阅读说明：本技术 自行车多级链轮和自行车链轮 (Multistage sprocket wheel and bicycle chainwheel ) 是由 福永康文 江村笃裕 于 2019-05-23 设计创作，主要内容包括：自行车多级链轮包括多个链轮。多个链轮包括第一链轮和第二链轮。第二链轮包括第二链轮主体和多个第二链轮齿,所述多个第二链轮齿相对于旋转中心轴线从第二链轮主体径向向外延伸。所述多个第二链轮齿包括至少一个链条弯曲限制齿,所述链条弯曲限制齿具有链条弯曲限制表面,所述链条弯曲限制表面构造为在自行车链条从所述至少一个链条弯曲限制齿朝向所述第一链轮倾斜的链条倾斜状态下,在轴向方向上支撑所述自行车链条的内链板,以防止多个第一链轮齿中的一个接合于设置在所述自行车链条的相对的一对外链板之间的外链空间中。(Multistage sprocket wheel includes multiple sprocket wheels.Multiple sprocket wheels include the first sprocket wheel and the second sprocket wheel.Second sprocket wheel includes the second sprocket body and multiple second sprockets, and the multiple second sprocket extends radially outwardly relative to center of rotation axis from the second sprocket body.The multiple second sprocket includes at least one chain flexes limitation tooth, the chain flexes limitation tooth has chain flexes limiting surface, the chain flexes limiting surface is configured to limit tooth towards under the inclined chain heeling condition of first sprocket wheel from least one described chain flexes in bicycle chain, the inner plate of the bicycle chain is supported, in the axial direction to prevent one in multiple first sprockets to be engaged in the outer chain space between opposite a pair of of outer plate that the bicycle chain is arranged in.)

1. a kind of multistage sprocket wheel, the multistage sprocket wheel include:

Multiple sprocket wheels, the multiple sprocket wheel include:

First sprocket wheel, first sprocket wheel have the first maximum outside diameter and including the first sprocket bodies and relative to the bicycle Multiple first sprockets that the center of rotation axis of multi-chain gear wheel extends radially outwardly from first sprocket body；With

Second sprocket wheel, second sprocket wheel have the second maximum outside diameter less than first maximum outside diameter, and including the second chain Wheel body and multiple second sprockets to extend radially outwardly relative to the center of rotation axis from second sprocket body, Second sprocket wheel is adjacent with first sprocket wheel in the axial direction relative to the center of rotation axis, therebetween without another One sprocket wheel,

The multiple second sprocket includes at least one chain flexes limitation tooth, at least one chain flexes limitation tooth tool There is chain flexes limiting surface, the chain flexes limiting surface is configured to curved from least one described chain in bicycle chain Song limitation tooth supports the bicycle chain along the axial direction towards under the inclined chain heeling condition of first sprocket wheel Inner plate, to prevent one in the multiple first sprocket to be engaged in, opposite one of the bicycle chain is set To in the outer chain space between outer plate.

2. multistage sprocket wheel according to claim 1, wherein

First sprocket wheel have the first bicycle inner surface and be arranged in the first bicycle inner surface along described The first bicycle outer surface in the opposite side of axial direction,

Second sprocket wheel have the second bicycle inner surface and be arranged in the second bicycle inner surface along described The second bicycle outer surface in the opposite side of axial direction,

The first bicycle outer surface and the second bicycle inner surface are facing with each other on the axial direction, and And

The chain flexes limiting surface is arranged in the second bicycle outer surface.

3. multistage sprocket wheel according to claim 1, wherein

The chain flexes limiting surface is at least partly in the extension in the radial direction relative to the center of rotation axis.

4. multistage sprocket wheel according to claim 2, wherein

At least one chain flexes limitation tooth has the chamfered part being arranged in the second bicycle outer surface, and And

The chain flexes limiting surface is disposed radially inwardly relative to the center of rotation axis from the chamfered part.

5. multistage sprocket wheel according to claim 4, wherein

At least one chain flexes limitation tooth has the additional corner portion being arranged in the second bicycle inner surface Point.

6. multistage sprocket wheel according to claim 4, wherein

The chamfered part is constructed so that the tooth top of at least one chain flexes limitation tooth is at least partly arranged to It is closer from the second bicycle outer surface from the second bicycle inner surface ratio on the axial direction.

7. multistage sprocket wheel according to claim 2, wherein

Second sprocket body has the axial lowered portion relative to the center of rotation axis axial depression, and

The axial lowered portion is disposed radially inwardly relative to the center of rotation axis from the chain flexes limiting surface.

8. multistage sprocket wheel according to claim 2, wherein

Second sprocket wheel has root circle, and

The chain flexes limiting surface is radially outward arranged relative to the center of rotation axis from the root circle.

9. multistage sprocket wheel according to claim 8, wherein

The chain flexes limiting surface is arranged in radial teeth area relative to the center of rotation axis,

The radial teeth area has relative to the radially end of the center of rotation axis and radially innermost end,

Described in the radial teeth area radially between end and the root circle of second sprocket wheel relative to the rotation Turn the first radial distance that central axis limits as 4.5mm, and

Relative to the rotation between the radially innermost end in the radial teeth area and the root circle of second sprocket wheel Turn the second radial distance that central axis limits as 2.5mm.

10. multistage sprocket wheel according to claim 2, wherein

The surface of the chain flexes limiting surface and second sprocket body in the second bicycle outer surface Between relative to the center of rotation axis limit axial distance, and

The range of the axial distance is 0mm to 0.3mm.

11. multistage sprocket wheel according to claim 10, wherein

The chain flexes limiting surface is from the surface of second sprocket body along the axial direction towards described The offset of two bicycle inner surfaces.

12. multistage sprocket wheel according to claim 10, wherein

The chain flexes limiting surface is from the surface of second sprocket body along the axial direction far from described The offset of two bicycle inner surfaces.

13. multistage sprocket wheel according to claim 1, wherein

The chain flexes limiting surface extends to the tooth top of at least one chain flexes limitation tooth.

14. multistage sprocket wheel according to claim 1, wherein

At least one chain flexes limitation tooth has the tooth radial height relative to the center of rotation axis, and

The tooth radial height of at least one chain flexes limitation tooth is greater than other teeth of the multiple second sprocket At least one of radial height.

15. multistage sprocket wheel according to claim 1, wherein

First sprocket wheel includes that at least one is configured to assist the bicycle chain from second sprocket wheel towards described First downshift auxiliary area of one sprocket shift,

The multiple first sprocket includes the first downshift original tooth and relative to the of the center of rotation axis axial depression One axial depression tooth,

The first axis recess tooth is adjacent with the first downshift original tooth on the downstream side of rotation driving direction, does not have therebetween There is another tooth,

The first downshift original tooth and first axis recess tooth setting are at least one described first downshift auxiliary area In,

When from the axial direction relative to the center of rotation axis, at least one chain flexes limitation tooth is in institute It states and is set as adjacent with first axis recess tooth on the downstream side of rotation driving direction, therebetween without another tooth, and

The chain flexes limiting surface is configured to limit tooth towards described the from the chain flexes in the bicycle chain Under the inclined chain heeling condition of one axial depression tooth, the interior chain of the bicycle chain is supported on the axial direction Plate, to prevent first axis recess toe joint together in being arranged between opposite a pair of of outer plate of the bicycle chain In outer chain space.

16. a kind of bicycle chainwheel, the bicycle chainwheel include:

Sprocket body, the sprocket body include that first axis towards surface and second is axially facing surface, the first axis Towards surface and described second be axially facing surface relative to the bicycle chainwheel center of rotation axis towards axial direction, Described second, which is axially facing surface, is arranged in the first axis towards surface in the opposite side of the axial direction, described First axis is in the case where the bicycle chainwheel is installed to the assembled state of bicycle towards the bicycle towards surface structure Central plane；

Multiple sprockets, the multiple sprocket radially outward prolong relative to the center of rotation axis from the sprocket body It stretches；

At least one upshift auxiliary area, it is described at least one upshift auxiliary area be configured to auxiliary bike chain from it is described from Sprocket wheel drive a vehicle towards compared with minor sprocket gear shift, it is described adjacent with the bicycle chainwheel on the axial direction compared with minor sprocket and its Between without another sprocket wheel；

The multiple sprocket include center tooth and relative to the center of rotation axis axial depression at least one is axial recessed Upshift tooth is fallen into, at least one axial depression upshift tooth is adjacent with the center tooth on the downstream side of rotation driving direction, Therebetween without another tooth, at least one axial depression upshift tooth is arranged at least one described upshift auxiliary area, The center tooth includes:

Tip portion is driven, the driving tip portion is at least partly arranged on the axial direction from the first axle It is closer to surface is axially facing from described second towards surface ratio；

Driving surface linear segment, the driving surface linear segment have in the driving surface linear segment and from the rotation Turn central axis and extends to the driving limited between the first radial line of the radially outermost edge of the driving surface linear segment Surface angle；With

Non-driven surface linear part, the non-driven surface linear part have the non-driven surface linear part and from The center of rotation axis is extended between the second radial line of the radially outermost edge of the non-driven surface linear part and is limited Fixed non-driven surface angle, the non-driven surface angle are greater than the driving surface angle；And

First non-step inclined plane, the first non-step inclined plane are arranged in circumferential direction relative to the center of rotation axis Between at least one axial depression upshift tooth and the center tooth.

17. bicycle chainwheel according to claim 16, further includes

At least one downshift auxiliary area, at least one described downshift auxiliary area be configured to assist the bicycle chain from compared with Minor sprocket towards the bicycle chainwheel gear shift, wherein

The multiple sprocket includes at least one axial depression downshift tooth relative to the center of rotation axis axial depression,

At least one axial depression downshift tooth is adjacent with the center tooth on the upstream side of the rotation driving direction, Between without another tooth, and

At least one axial depression downshift tooth setting is at least one described downshift auxiliary area.

18. bicycle chainwheel according to claim 17, further includes

Second non-step inclined plane, the second non-step inclined plane are arranged recessed at least one described axial direction in the circumferential direction It falls between downshift tooth and the first non-step inclined plane.

19. bicycle chainwheel according to claim 16, wherein

The range of the driving surface angle is 0 degree to 20 degree.

20. bicycle chainwheel according to claim 19, wherein

The range of the non-driven surface angle is 20 degree to 60 degree.

Technical field

The present invention relates to multistage sprocket wheel and bicycle chainwheels.

Background technique

Cycling is becoming the entertainment form being becoming increasingly popular and mode of transportation.In addition, cycling has become For by the competitive sport of amateur and professional person's welcome.No matter bicycle is for entertaining, and traffic is still raced, from Driving industry is all in the various parts for continuously improving bicycle.A kind of bicycle assembly parts redesigned extensively are voluntarily Blockchain wheel, especially multistage sprocket wheel.

Summary of the invention

According to the first aspect of the invention, a kind of multistage sprocket wheel includes multiple sprocket wheels.The multiple sprocket wheel includes First sprocket wheel and the second sprocket wheel.First sprocket wheel has the first maximum outside diameter and including the first sprocket body and relative to described Multiple first sprockets that the center of rotation axis of multistage sprocket wheel extends radially outwardly from first sprocket body.Institute Stating the second sprocket wheel has the second maximum outside diameter for being less than first maximum outside diameter.Second sprocket wheel includes the second sprocket body With multiple second sprockets to extend radially outwardly relative to the center of rotation axis from second sprocket body.Described Two sprocket wheels are adjacent with first sprocket wheel in the axial direction relative to the center of rotation axis, therebetween without another chain Wheel.The multiple second sprocket includes at least one chain flexes limitation tooth, at least one chain flexes limitation tooth tool There is a chain flexes limiting surface, the chain flexes limiting surface is configured in the bicycle chain from least one described chain Item bending limitation tooth supports the bicycle along the axial direction towards under the inclined chain heeling condition of first sprocket wheel The opposite of the bicycle chain is arranged in prevent one in the multiple first sprocket to be engaged in the inner plate of chain A pair of of outer plate between outer chain space in.

Using the multistage sprocket wheel according to first aspect, the chain flexes limiting surface of the second sprocket wheel supports interior chain Plate, to inhibit in multiple first sprockets during bicycle chain is from the second sprocket wheel to the gear-change operation of the first sprocket shift One is bonded in the outer chain space of bicycle chain.This enable bicycle chain in scheduled gear shift auxiliary area into The reliable gear-change operation of row, keeps gear-change operation more stable.

According to the second aspect of the invention, the multistage sprocket build according to first aspect is at making described One sprocket wheel have the first bicycle inner surface and be arranged in the first bicycle inner surface along the axial direction The first bicycle outer surface in opposite side.Second sprocket wheel has the second bicycle inner surface and setting described the The second bicycle outer surface in the opposite side of the axial direction of two bicycle inner surfaces.First bicycle Outer surface and the second bicycle inner surface are facing with each other on the axial direction.The chain flexes limiting surface It is arranged in the second bicycle outer surface.

Using the multistage sprocket wheel according to second aspect, the curved of bicycle chain can be reduced during shift operation It is bent.

According to the third aspect of the invention we, the multistage sprocket build according to first aspect or second aspect at So that the chain flexes limiting surface is at least partly in the extension in the radial direction relative to the center of rotation axis.

Using the multistage sprocket wheel according to the third aspect, the curved of bicycle chain can be reduced during shift operation It is bent.

According to the fourth aspect of the invention, the multistage sprocket build according to second aspect or the third aspect at So that at least one chain flexes limitation tooth has the chamfered part being arranged in the second bicycle outer surface.Institute It states chain flexes limiting surface and is disposed radially inwardly relative to the center of rotation axis from the chamfered part.

Using the multistage sprocket wheel according to fourth aspect, chamfered part makes at least one chain flexes limitation tooth and oneself The smooth engagement of driving chain.

According to the fifth aspect of the invention, the multistage sprocket build according to fourth aspect be so that it is described extremely Few chain flexes limitation tooth has the additional chamfered part being arranged in the second bicycle inner surface.

Using the multistage sprocket wheel according to the 5th aspect, additional chamfered part makes at least one chain flexes limit tooth With the smooth engagement of bicycle chain.

According to the sixth aspect of the invention, the multistage sprocket build according to fourth aspect or the 5th aspect is So that the chamfered part is constructed so that the tooth top of at least one chain flexes limitation tooth is at least partly arranged to It is closer from the second bicycle outer surface from the second bicycle inner surface ratio on the axial direction.

Using the multistage sprocket wheel according to the 6th aspect, can bicycle chain from compared with minor sprocket to the second sprocket wheel At least one chain flexes limitation tooth and bicycle chain is inhibited to be not intended to engage in the gear-change operation of gear shift.This makes from smaller The gear-change operation of sprocket wheel to the second sprocket wheel is steady.

According to the seventh aspect of the invention, the multistage according to second aspect either side into the 6th aspect Sprocket build is so that second sprocket body has the axial depression portion relative to the center of rotation axis axial depression Point.The axial lowered portion is disposed radially inwardly relative to the center of rotation axis from the chain flexes limiting surface.

Using the multistage sprocket wheel according to the 7th aspect, axial lowered portion improve from compared with minor sprocket to the second chain The gear-change operation of wheel, and from the second sprocket wheel to the gear-change operation of the first sprocket wheel.

According to the eighth aspect of the invention, the multistage according to second aspect either side into the 7th aspect Sprocket build is so that second sprocket wheel has root circle.The chain flexes limiting surface is relative to the Pivot axle Line is radially outward arranged from the root circle.

Using the multistage sprocket wheel according to eighth aspect, the curved of bicycle chain can be reduced during shift operation It is bent.

According to the ninth aspect of the invention, the multistage sprocket build according to eighth aspect is so that the chain Item is bent limiting surface and is arranged in radial teeth area relative to the center of rotation axis.The radial teeth area has relative to institute State radially end and the radially innermost end of center of rotation axis.The radially end and described the described in the radial teeth area The first radial distance limited between the root circle of two sprocket wheels relative to the center of rotation axis is 4.5mm.Described Relative to the center of rotation axis between the radially innermost end in radial teeth area and the root circle of second sprocket wheel The second radial distance limited is 2.5mm.

Using the multistage sprocket wheel according to the 9th aspect, the curved of bicycle chain can be reduced during shift operation It is bent.

According to the tenth aspect of the invention, the multistage according to second aspect either side into the 9th aspect Sprocket build is the chain flexes limiting surface and second sprocket wheel so that in the second bicycle outer surface Axial distance is limited relative to the center of rotation axis between the surface of main body.The range of the axial distance be 0mm extremely 0.3mm。

Using the multistage sprocket wheel according to the tenth aspect, the curved of bicycle chain can be reduced during shift operation It is bent.

According to the eleventh aspect of the invention, the multistage sprocket build according to the tenth aspect is so that described Chain flexes limiting surface is from the surface of second sprocket body along the axial direction towards second bicycle Inner surface offset.

Using the multistage sprocket wheel according to the tenth one side, bicycle chain can be reduced during shift operation Bending, while the gear-change operation of held stationary.

According to the twelfth aspect of the invention, the multistage sprocket build according to the tenth aspect is so that described Chain flexes limiting surface is from the surface of second sprocket body along the axial direction far from second bicycle Inner surface offset.

Using the multistage sprocket wheel according to the 12nd aspect, it can definitely reduce bicycle during shift operation The bending of chain.

According to the thirteenth aspect of the invention, the bicycle according to first aspect either side into the 9th aspect is more Grade sprocket build is so that the chain flexes limiting surface extends to the tooth top of at least one chain flexes limitation tooth.

Using the multistage sprocket wheel according to the 13rd aspect, it can definitely reduce bicycle during shift operation The bending of chain.

According to the fourteenth aspect of the invention, the bicycle according to first aspect either side into the 13rd aspect Multi-chain gear wheel is constructed so that at least one chain flexes limitation tooth has the tooth footpath relative to the center of rotation axis To height.The tooth radial height of at least one chain flexes limitation tooth is greater than other of the multiple second sprocket The radial height of at least one of tooth.

Using the multistage sprocket wheel according to fourteenth aspect, it can definitely reduce bicycle during shift operation The bending of chain.

According to the fifteenth aspect of the invention, the bicycle according to first aspect either side into the 15th aspect Multi-chain gear wheel is constructed so that first sprocket wheel includes that at least one is configured to assist the bicycle chain from described second First downshift auxiliary area of the sprocket wheel towards first sprocket shift.The multiple first sprocket includes that the first downshift is initial Tooth and relative to the center of rotation axis axial depression first axis be recessed tooth.The first axis recess tooth drives in rotation It is adjacent with the first downshift original tooth on the downstream side in dynamic direction, therebetween without another tooth.The first downshift original tooth With first axis recess tooth setting at least one described first downshift auxiliary area.When from relative to the rotation When the axial direction observation of mandrel line, at least one chain flexes limitation tooth is on the downstream side of the rotation driving direction It is set as adjacent with first axis recess tooth, therebetween without another tooth.The chain flexes limiting surface is configured to The bicycle chain limits tooth from the chain flexes and is recessed under the inclined chain heeling condition of tooth towards the first axis, The inner plate of the bicycle chain is supported on the axial direction, with prevent first axis recess toe joint together in It is arranged in the outer chain space between opposite a pair of of outer plate of the bicycle chain.

Using the multistage sprocket wheel according to the 15th aspect, at least one chain flexes limits tooth, the first downshift just Beginning tooth and first axis recess tooth make gear-change operation more stable.

According to the sixteenth aspect of the invention, a kind of bicycle chainwheel include sprocket body, multiple sprockets, at least one Upshift auxiliary area and the first non-step inclined plane.The sprocket body includes that first axis towards surface and second is axially facing table Face, the first axis are axially facing center of rotation axis face of the surface relative to the bicycle chainwheel towards surface and second Direction in the axial direction.Described second is axially facing the surface first axis the is arranged in phase along the axial direction towards surface On tossing about.The first axis towards surface structure be in the case where the bicycle chainwheel is installed to the assembled state of bicycle towards The central plane of the bicycle.The multiple sprocket relative to the center of rotation axis from the sprocket body it is radial to Outer extension.At least one upshift auxiliary area is configured to auxiliary bike chain from the bicycle chainwheel towards compared with chainlet rotation Shelves are described adjacent with the bicycle chainwheel on the axial direction compared with minor sprocket and therebetween without another sprocket wheel.It is described Multiple sprockets include center tooth and at least one axial depression upshift tooth relative to the center of rotation axis axial depression. At least one axial depression upshift tooth is adjacent with the center tooth on the downstream side of the rotation driving direction, does not have therebetween There is another tooth.At least one axial depression upshift tooth setting is at least one upshift auxiliary area.The center tooth Including driving tip portion, driving surface linear segment and non-driven surface linear part.The driving tip portion at least portion Point be set as on the axial direction being axially facing surface from described second towards surface ratio from the first axis it is closer. The driving surface linear segment has in the driving surface linear segment and extends to from the center of rotation axis described The driving surface angle limited between first radial line of the radially outermost edge of driving surface linear segment.The non-driven table Area linear part has in the non-driven surface linear part and extends to the non-driven table from the center of rotation axis The non-driven surface angle limited between second radial line of the radially outermost edge of area linear part.The non-driven surface angle Degree is greater than the driving surface angle.The first non-step inclined plane is set in circumferential direction relative to the center of rotation axis It sets and upshifts between tooth and the center tooth at least one described axial depression.

Using the bicycle chainwheel according to the 16th aspect, center tooth and at least one axial depression upshift tooth make voluntarily Blockchain item can carry out reliable gear-change operation in scheduled gear shift auxiliary area, so that gear-change operation is more stable.Voluntarily Blockchain item from compared with gear-change operation from minor sprocket to bicycle chainwheel gear shift during, can prevent center tooth first with bicycle chain Unintentionally engage.

According to the seventeenth aspect of the invention, the bicycle chainwheel according to the 16th aspect further includes being configured to assist The bicycle chain from compared with minor sprocket towards the bicycle chainwheel gear shift at least one downshift auxiliary area.It is the multiple Sprocket includes at least one axial depression downshift tooth relative to the center of rotation axis axial depression.It is described at least one Axial depression downshift tooth is adjacent with the center tooth on the upstream side of the rotation driving direction, therebetween without another tooth. At least one axial depression downshift tooth setting is at least one described downshift auxiliary area.

Using the bicycle chainwheel according to the 17th aspect, gear-change operation can be made steady.

According to the eighteenth aspect of the invention, the bicycle chainwheel according to the 17th aspect further includes the second non-ladder Inclined-plane, the second non-step inclined plane is arranged in the circumferential direction to downshift tooth and described at least one described axial depression Between first non-step inclined plane.

Using the bicycle chainwheel according to the 18th aspect, it can further make gear-change operation steady.

According to the nineteenth aspect of the invention, according to the 16th aspect either side into the 18th aspect voluntarily Blockchain wheel construction is so that the range of the driving surface angle is 0 degree to 20 degree.

Using the bicycle chainwheel according to the 19th aspect, it can further make gear-change operation steady.

According to a twentieth aspect of the invention, the bicycle chainwheel according to the 19th aspect is constructed so that the drive The range of dynamic surface angle is 20 degree to 60 degree.

Using the bicycle chainwheel according to the 20th aspect, it can further make gear-change operation steady.

Detailed description of the invention

It by reference to attached drawing and the following detailed description to embodiment selected by the present invention, can be readily available, simultaneously will More fully understand more complete intention of the invention and its many bonus.

Fig. 1 be include bicycle drivetrain bicycle schematic diagram.

Fig. 2 is the side view of the multistage sprocket wheel of bicycle drivetrain shown in Fig. 1.

The sectional view for the multistage sprocket wheel that line III-III of the Fig. 3 in Fig. 2 is intercepted.

Fig. 4 is the side view of the sprocket wheel of multistage sprocket wheel shown in Fig. 2.

Fig. 5 is the side view of the sprocket wheel of multistage sprocket wheel shown in Fig. 2.

Fig. 6 is the side view of the sprocket wheel of multistage sprocket wheel shown in Fig. 2.

Fig. 7 is the side view of the sprocket wheel of multistage sprocket wheel shown in Fig. 2.

Fig. 8 is the side view of the sprocket wheel of multistage sprocket wheel shown in Fig. 2.

Fig. 9 is the side view of the sprocket wheel of multistage sprocket wheel shown in Fig. 2.

Figure 10 is the side view of the sprocket wheel of multistage sprocket wheel shown in Fig. 2.

Figure 11 is the side view of the sprocket wheel of multistage sprocket wheel shown in Fig. 2.

Figure 12 is the side view of the sprocket wheel of multistage sprocket wheel shown in Fig. 2.

Figure 13 is the side view of the sprocket wheel of multistage sprocket wheel shown in Fig. 2.

Figure 14 is the side view of the sprocket wheel of multistage sprocket wheel shown in Fig. 2.

Figure 15 is the side view of the sprocket wheel of multistage sprocket wheel shown in Fig. 2.

Figure 16 is another side view of multistage sprocket wheel shown in Fig. 2.

Figure 17 is another side view of sprocket wheel shown in Fig. 5.

Figure 18 is another side view of sprocket wheel shown in Fig. 6.

Figure 19 is the partial side view that sprocket wheel shown in Fig. 4 and Fig. 5 has bicycle chain.

Figure 20 is the partial perspective view of sprocket wheel shown in Fig. 5.

Figure 21 is the partial side view of sprocket wheel shown in Fig. 5.

Figure 22 is the partial side view of the sprocket wheel of the modification of sprocket wheel shown in 1 according to fig. 2.

Figure 23 is another partial perspective view of sprocket wheel shown in Fig. 5.

Figure 24 is the partial front elevation view of sprocket wheel shown in Fig. 5.

Figure 25 is the partial front elevation view of the sprocket wheel of the modification of the sprocket wheel according to shown in Fig. 5.

Figure 26 is the sectional view of the sprocket wheel intercepted along the XXVI-XXVI line of Figure 21.

Figure 27 is the partial side view of sprocket wheel shown in Fig. 5.

Figure 28 is the partial front elevation view of sprocket wheel shown in Fig. 4.

Figure 29 is the partial side view of sprocket wheel shown in Fig. 4.

Figure 30 is the partial perspective view of sprocket wheel shown in Fig. 4.

Figure 31 is the partial front elevation view of sprocket wheel shown in Fig. 4.

Figure 32 is the partial perspective view of sprocket wheel shown in Fig. 4.

Figure 33 is the side view of the inner plate of the bicycle chain of bicycle drivetrain shown in Fig. 1.

Figure 34 is the partial side view that sprocket wheel shown in Fig. 4 has bicycle chain.

Figure 35 is the partial side view that sprocket wheel shown in Fig. 4 has bicycle chain.

Figure 36 is that the sprocket wheel intercepted along the line XXXVI-XXXVI of Figure 35 has the sectional view of bicycle chain.

Figure 37 is the partial side view of sprocket wheel shown in Figure 12.

Figure 38 is the partial front elevation view of sprocket wheel shown in Figure 12.

Figure 39 is the side view of the sprocket wheel of the modification of the sprocket wheel according to shown in Figure 12.

Figure 40 is the side view of the sprocket wheel of the modification of the sprocket wheel according to shown in Figure 13.

Figure 41 is the side view of the sprocket wheel of the modification of the sprocket wheel according to shown in Figure 14.

Figure 42 is the side view of the sprocket wheel of the modification of the sprocket wheel according to shown in Figure 15.

Figure 43 is the combination for the total number of teeth of sprocket wheel for indicating multistage sprocket wheel and the multistage chain according to modification The combined list of total number of teeth of the sprocket wheel of wheel.

Specific embodiment

It is now described with reference to the drawings embodiment, wherein similar appended drawing reference indicates corresponding or identical in the drawings Element.

Referring initially to Fig. 1, bicycle 10 includes cycle frame BF and bicycle drivetrain 11.Bicycle drivetrain 11 wraps Include crank assemblies 2, flower-drum component 4, multistage sprocket wheel 12 and bicycle chain C.Multistage sprocket wheel 12 is mounted on flower On drum component 4.Crank assemblies 2 include crank axle 2A, right crank arm 2B, left crank arm 2C and preceding sprocket wheel 2D.Right crank arm 2B and Left crank arm 2C is fixed to crank axle 2A.Preceding sprocket wheel 2D is fixed at least one of crank axle 2A and right crank arm 2B.Voluntarily Blockchain C is engaged with preceding sprocket wheel 2D and multistage sprocket wheel 12, and pedal force is transmitted to multistage from preceding sprocket wheel 2D Sprocket wheel 12.In the shown embodiment, crank assemblies 2 include the preceding sprocket wheel 2D as single sprocket wheel.However, crank assemblies 2 can wrap Include multiple preceding sprocket wheels.Multistage sprocket wheel 12 is rear sprocket assembly.However, the structure of multistage sprocket wheel 12 can be applied In preceding sprocket wheel.

In this application, following directional terminology "front", "rear", " forward ", " backward ", "left", "right", " transverse direction ", " to On " refer to " downward " and any other similar directional terminology based on the vehicle seat (not shown) for being sitting in bicycle and face To the user (cyclist) of handlebar (not shown) and determine those of direction.Therefore, for describing multistage sprocket wheel 12 These terms should relative to equipped with multistage sprocket wheel 12 on a horizontal surface uprightly to ride what posture used Bicycle is explained.

As shown in Fig. 2, multistage sprocket wheel 12 has center of rotation axis A1.Multistage sprocket wheel 12 is by flower-drum group Part 4 is pivotably supported relative to cycle frame BF (Fig. 1) around center of rotation axis A1.Multistage sprocket wheel 12 passes through lock Determine the sprocket support body that component 4A is fixed to flower-drum component 4.Multistage sprocket wheel 12 is configured to connect with bicycle chain C It closes, with transmitting drives rotary force F1 between bicycle chain C and multistage sprocket wheel 12 during scrunching.It was scrunching Cheng Zhong, multistage sprocket wheel 12 rotate on rotation driving direction D11 around center of rotation axis A1.Rotate driving direction D11 D1 is limited center of rotation axis A1 relative to multistage sprocket wheel 12 along circumferential direction.Reversely rotating direction D12 is rotation The opposite direction of driving direction D11 and along circumferential direction D1 are limited.

Multistage sprocket wheel 12 includes multiple sprocket wheel SP.Multiple sprocket wheel SP include the first sprocket wheel SP1 and the second sprocket wheel SP2.Multiple sprocket wheel SP include third sprocket wheel SP3 to the 12nd sprocket wheel SP12.First sprocket wheel SP1 to the 12nd sprocket wheel SP12 can also Bicycle chainwheel SP1 is referred to as to bicycle chainwheel SP12.Therefore, bicycle drivetrain 11 includes bicycle chainwheel and voluntarily Blockchain C.The sum of sprocket wheel SP is equal to or more than 10.The sum of sprocket wheel SP is preferably equal to or greater than 11.The sum of sprocket wheel SP More preferably equal to or greater than 12.In this embodiment, the sum of sprocket wheel SP is 12.However, the sum of sprocket wheel SP is not limited to this Embodiment and above range.

In this embodiment, sprocket wheel SP12 is the maximum sprocket wheel in multistage sprocket wheel 12.Third sprocket wheel SP3 is voluntarily Minimum sprocket wheel in vehicle multi-chain gear wheel 12.First sprocket wheel SP1 has the first maximum outside diameter DM1.Second sprocket wheel SP2 has less than the The second maximum outside diameter DM2 of one maximum outside diameter DM1.Third sprocket wheel SP3 has the third less than the second maximum outside diameter DM2 maximum outer Diameter DM3.4th sprocket wheel SP4 to the 12nd sprocket wheel SP12 is respectively provided with the 4th maximum outside diameter DM4 to the 12nd maximum outside diameter DM12. Third maximum outside diameter DM3 is minimum into the 12nd maximum outside diameter DM12 in the first maximum outside diameter DM1.12nd maximum outside diameter DM12 It is maximum into the 12nd maximum outside diameter DM12 in the first maximum outside diameter DM1.Sprocket wheel SP1 to the size relationship between sprocket wheel SP12 not It is limited to the embodiment.

As shown in figure 3, the second sprocket wheel SP2 is adjacent with the first sprocket wheel SP1, and in the axial direction relative to center of rotation axis A1 On the D2 of direction, therebetween without another sprocket wheel.Axial direction D2 is parallel to center of rotation axis A1.Third sprocket wheel SP3 and second Sprocket wheel SP2 is adjacent, in the axial direction on D2, therebetween without another sprocket wheel.Third sprocket wheel SP3, the second sprocket wheel SP2, the first chain Taking turns SP1 and the 4th sprocket wheel SP4 to the 12nd sprocket wheel SP12, in axial direction D2 is arranged in this order.Sprocket wheel SP1 to sprocket wheel SP12 It is component independent of each other.However, sprocket wheel SP1 at least two can at least partly set into sprocket wheel SP12 integrally to each other The formula that sets as one monomer members.Sprocket wheel SP1 to sprocket wheel SP12 is made of the metal material of such as titanium or aluminium.However, sprocket wheel SP1 is extremely The material of sprocket wheel SP12 is not limited to the embodiment.At least one of sprocket wheel SP1 to sprocket wheel SP12 can be by another metal material Material or nonmetallic materials are made.At least one of sprocket wheel SP1 to sprocket wheel SP12 can have by multiple material system different from each other At composite construction.

As shown in figure 4, the first sprocket wheel SP1 includes the first sprocket body SP1A and multiple first sprocket SP1B.Multiple One sprocket SP1B relative to multistage sprocket wheel 12 center of rotation axis A1 from the first sprocket body SP1A radially outward Extend.First sprocket wheel SP1 is referred to as bicycle chainwheel SP1.First sprocket body SP1A is referred to as sprocket body SP1A.Multiple first sprocket SP1B are referred to as multiple sprocket SP1B.That is, bicycle chainwheel SP1 includes sprocket body SP1A and multiple sprocket SP1B.Multiple sprocket SP1B relative to center of rotation axis A1 accessary sprocket wheel main body SP1A radially outward Extend.

First sprocket wheel SP1 includes multiple root portion SP1C.Root portion SP1C be arranged in two adjacent sprocket SP1B it Between.First sprocket wheel SP1 has the root circle RC1 limited by multiple root portion SP1C.Total number of teeth of bicycle chainwheel SP1 is (multiple The sum of sprocket SP1B) it is equal to or more than 11.In this embodiment, total number of teeth of the first sprocket wheel SP1 is 14.But first The sum of multiple sprocket SP1B of sprocket wheel SP1 is not limited to the embodiment.

First sprocket wheel SP1 includes being configured to auxiliary bike chain C from the first sprocket wheel SP1 of the second sprocket wheel SP2 (Fig. 3) direction At least one first downshift auxiliary area FD1 of gear shift.Bicycle chainwheel SP1 includes at least one upshift auxiliary area FU1, until A few upshift auxiliary area FU1 is configured to auxiliary bike chain C from bicycle chainwheel SP1 towards compared with minor sprocket SP2 (Fig. 3) Gear shift, it is adjacent with bicycle chainwheel SP1 compared with minor sprocket SP2 and in the axial direction on D2 therebetween without another sprocket wheel.At this In embodiment, the first sprocket wheel SP1 includes multiple downshift auxiliary area FD1 and multiple upshift auxiliary area FU1.In the embodiment In, the first sprocket wheel SP1 includes two downshift auxiliary area FD1 and two upshift auxiliary area FU1.However, downshift auxiliary area The sum of FD1 is not limited to the embodiment.The sum of upshift auxiliary area FU1 is not limited to the embodiment.

As shown in figure 5, the second sprocket wheel SP2 includes the second sprocket body SP2A and multiple second sprocket SP2B.Multiple Two sprocket SP2B extend radially outwardly relative to center of rotation axis A1 from the second sprocket body SP2A.Second sprocket wheel SP2 It is properly termed as bicycle chainwheel SP2.Second sprocket body SP2A is referred to as sprocket body SP2A.Multiple second sprockets SP2B is referred to as multiple sprocket SP2B.That is, bicycle chainwheel SP2 includes sprocket body SP2A and multiple sprockets SP2B.Multiple sprocket SP2B extend radially outwardly relative to center of rotation axis A1 accessary sprocket wheel main body SP2A.

Second sprocket wheel SP2 includes multiple root portion SP2C.Root portion SP2C be arranged in two adjacent sprocket SP2B it Between.Second sprocket wheel SP2 has the root circle RC2 limited by multiple root portion SP2C.Total number of teeth of bicycle chainwheel SP2 is (multiple The sum of sprocket SP2B) it is equal to or more than 11.In this embodiment, total number of teeth of the second sprocket wheel SP2 is 12.However, second The sum of multiple sprocket SP2B of sprocket wheel SP2 is not limited to the embodiment.

Sprocket wheel SP2 include be configured to auxiliary bike chain C from compared with minor sprocket SP3 towards sprocket wheel SP2 gear shift at least one A downshift auxiliary area FD2.Sprocket wheel SP2 includes being configured to auxiliary bike chain C accessary sprocket wheel SP2 direction to change compared with minor sprocket SP3 At least one upshift auxiliary area FU2 of shelves.In this embodiment, the second sprocket wheel SP2 include downshift auxiliary area FD2 with Multiple upshift auxiliary area FU2.In this embodiment, the second sprocket wheel SP2 includes two upshift auxiliary area FU2.However, downshift The sum of auxiliary area FD2 is not limited to the embodiment.The sum of upshift auxiliary area FU2 is not limited to the embodiment.

As shown in figure 3, the first sprocket wheel SP1 has the first bicycle inner surface SP1E and in axial direction D2 is arranged the The first bicycle outer surface SP1F in the opposite side of one bicycle inner surface SP1E.Second sprocket wheel SP2 have second from Driving inner surface SP2E and in axial direction D2 be arranged in the opposite side of the second bicycle inner surface SP2E second oneself Drive a vehicle outer surface SP2F.First bicycle outer surface SP1F and the second bicycle inner surface SP2E is in the axial direction on D2 It is facing with each other.First bicycle inner surface SP1E is configured to be installed to the assembled state of bicycle 10 in bicycle chainwheel SP1 Under the central plane 10A (Fig. 1) towards bicycle 10.Second bicycle inner surface SP2E is configured in bicycle chainwheel SP1 It is installed to the central plane 10A (Fig. 1) under the assembled state of bicycle 10 towards bicycle 10.

Sprocket body SP1A, which includes first axis, is axially facing surface SP1A2 towards surface SP1A1 and second, and second is axial Towards surface SP1A2 relative to bicycle chainwheel SP1 center of rotation axis A1 towards axial direction D2.Second is axially facing table In axial direction D2 is arranged in opposite side of the first axis towards surface SP1A1 face SP1A2.First axis is towards surface SP1A1 is configured to the central plane 10A under the assembled state that bicycle chainwheel SP1 is installed to bicycle 10 towards bicycle 10 (Fig. 1).

As shown in fig. 6, third sprocket wheel SP3 includes third sprocket body SP3A and multiple third sprocket SP3B.Multiple Three sprocket SP3B extend radially outwardly relative to center of rotation axis A1 from third sprocket body SP3A.Third sprocket wheel SP3 packet Include multiple root portion SP3C.Root portion SP3C is arranged between two adjacent sprocket SP3B.Third sprocket wheel SP3 has by more The root circle RC3 that a root portion SP3C is limited.Total number of teeth (sums of multiple sprocket SP3B) of third sprocket wheel SP3 is 10.So And the sum of multiple sprocket SP3B of third sprocket wheel SP3 is not limited to the embodiment.

As shown in fig. 7, the 4th sprocket wheel SP4 includes the 4th sprocket body SP4A and multiple 4th sprocket SP4B.Multiple Four sprocket SP4B extend radially outwardly relative to center of rotation axis A1 from the 4th sprocket body SP4A.4th sprocket wheel SP4 packet Include multiple root portion SP4C.Root portion SP4C is arranged between two adjacent sprocket SP4B.4th sprocket wheel SP4 has by more The root circle RC4 that a root portion SP4C is limited.Total number of teeth (sums of multiple sprocket SP4B) of bicycle chainwheel SP4 be equal to or Greater than 11.In this embodiment, total number of teeth of the 4th sprocket wheel SP4 is 16.But multiple sprocket SP4B of the 4th sprocket wheel SP4 Sum be not limited to the embodiment.

4th sprocket wheel SP4 include be configured to auxiliary bike chain C from compared with minor sprocket SP1 towards sprocket wheel SP4 gear shift to A few downshift auxiliary area FD4.Sprocket wheel SP4 includes being configured to auxiliary bike chain C accessary sprocket wheel SP4 towards compared with minor sprocket At least one upshift auxiliary area FU4 of SP1 gear shift.In this embodiment, the 4th sprocket wheel SP4 includes multiple downshift auxiliary areas FD4 and multiple upshift auxiliary area FU4.In this embodiment, the 4th sprocket wheel SP4 includes two downshift auxiliary area FD4 and two A upshift auxiliary area FU4.However, the sum of downshift auxiliary area FD4 is not limited to the embodiment.Upshift auxiliary area FU4's Sum is not limited to the embodiment.

As shown in figure 8, the 5th sprocket wheel SP5 includes the 5th sprocket body SP5A and multiple 5th sprocket SP5B.Multiple Five sprocket SP5B extend radially outwardly relative to center of rotation axis A1 from the 5th sprocket body SP5A.5th sprocket wheel SP5 packet Include multiple root portion SP5C.Root portion SP5C is arranged between two adjacent sprocket SP5B.5th sprocket wheel SP5 has by more The root circle RC5 that a root portion SP5C is limited.Total number of teeth (sums of multiple sprocket SP5B) of bicycle chainwheel SP5 be equal to or Greater than 11.In this embodiment, total number of teeth of the 5th sprocket wheel SP5 is 18.But multiple sprocket SP5B of the 5th sprocket wheel SP5 Sum be not limited to the embodiment.

Sprocket wheel SP5 include be configured to auxiliary bike chain C from compared with minor sprocket SP4 towards sprocket wheel SP5 gear shift at least one A downshift auxiliary area FD5.Sprocket wheel SP5 includes being configured to auxiliary bike chain C accessary sprocket wheel SP5 direction to change compared with minor sprocket SP4 At least one upshift auxiliary area FU5 of shelves.In this embodiment, the 5th sprocket wheel SP5 include multiple downshift auxiliary area FD5 and Multiple upshift auxiliary area FU5.In this embodiment, the 5th sprocket wheel SP5 includes two downshift auxiliary area FD5 and two upshifts Auxiliary area FU5.However, the sum of downshift auxiliary area FD5 is not limited to the embodiment.The sum of upshift auxiliary area FU5 is not It is limited to the embodiment.

As shown in figure 9, the 6th sprocket wheel SP6 includes the 6th sprocket body SP6A and multiple 6th sprocket SP6B.Multiple Six sprocket SP6B extend radially outwardly relative to center of rotation axis A1 from the 6th sprocket body SP6A.6th sprocket wheel SP6 packet Include multiple root portion SP6C.Root portion SP6C is arranged between two adjacent sprocket SP6B.6th sprocket wheel SP6 has by more The root circle RC6 that a root portion SP6C is limited.Total number of teeth (sums of multiple sprocket SP6B) of bicycle chainwheel SP6 be equal to or Greater than 19.In this embodiment, total number of teeth of the 6th sprocket wheel SP6 is 21.However, multiple sprocket SP6B of the 6th sprocket wheel SP6 Sum be not limited to the embodiment.

Sprocket wheel SP6 include be configured to auxiliary bike chain C from compared with minor sprocket SP5 towards sprocket wheel SP6 gear shift at least one A downshift auxiliary area FD6.Sprocket wheel SP6 includes being configured to auxiliary bike chain C accessary sprocket wheel SP6 direction to change compared with minor sprocket SP5 At least one upshift auxiliary area FU6 of shelves.In this embodiment, the 6th sprocket wheel SP6 include multiple downshift auxiliary area FD6 and Multiple upshift auxiliary area FU6.In this embodiment, the 6th sprocket wheel SP6 includes three downshift auxiliary area FD6 and three upshifts Auxiliary area FU6.However, the sum of downshift auxiliary area FD6 is not limited to the embodiment.The sum of upshift auxiliary area FU6 is not It is limited to the embodiment.

As shown in Figure 10, the 7th sprocket wheel SP7 includes the 7th sprocket body SP7A and multiple 7th sprocket SP7B.Multiple Seven sprocket SP7B extend radially outwardly relative to center of rotation axis A1 from the 7th sprocket body SP7A.7th sprocket wheel SP7 packet Include multiple root portion SP7C.Root portion SP7C is arranged between two adjacent sprocket SP7B.7th sprocket wheel SP7 has by more The root circle RC7 that a root portion SP7C is limited.Total number of teeth (sums of multiple sprocket SP7B) of bicycle chainwheel SP7 be equal to or Greater than 19.In this embodiment, total number of teeth of the 7th sprocket wheel SP7 is 24.But multiple sprocket SP7B of the 7th sprocket wheel SP7 Sum be not limited to the embodiment.

Sprocket wheel SP7 include be configured to auxiliary bike chain C from compared with minor sprocket SP6 towards sprocket wheel SP7 gear shift at least one A downshift auxiliary area FD7.Sprocket wheel SP7 includes being configured to auxiliary bike chain C accessary sprocket wheel SP7 direction to change compared with minor sprocket SP6 At least one upshift auxiliary area FU7 of shelves.In this embodiment, the 7th sprocket wheel SP7 include multiple downshift auxiliary area FD7 and Multiple upshift auxiliary area FU7.In this embodiment, the 7th sprocket wheel SP7 includes three downshift auxiliary area FD7 and three upshifts Auxiliary area FU7.However, the sum of downshift auxiliary area FD7 is not limited to the embodiment.The sum of upshift auxiliary area FU7 is not It is limited to the embodiment.

As shown in figure 11, the 8th sprocket wheel SP8 includes the 8th sprocket body SP8A and multiple 8th sprocket SP8B.Multiple Eight sprocket SP8B extend radially outwardly relative to center of rotation axis A1 from the 8th sprocket body SP8A.8th sprocket wheel SP8 packet Include multiple root portion SP8C.Root portion SP8C is arranged between two adjacent sprocket SP8B.8th sprocket wheel SP8 has by more The root circle RC8 that a root portion SP8C is limited.Total number of teeth (sums of multiple sprocket SP8B) of bicycle chainwheel SP8 be equal to or Greater than 25.In this embodiment, total number of teeth of the 8th sprocket wheel SP8 is 28.However, multiple sprocket SP8B of the 8th sprocket wheel SP8 Sum be not limited to the embodiment.

Sprocket wheel SP8 include be configured to auxiliary bike chain C from compared with minor sprocket SP7 towards sprocket wheel SP8 gear shift at least one A downshift auxiliary area FD8.Sprocket wheel SP8 includes being configured to auxiliary bike chain C accessary sprocket wheel SP8 to compared with minor sprocket SP7 gear shift At least one upshift auxiliary area FU8.In this embodiment, the 8th sprocket wheel SP8 includes multiple downshift auxiliary area FD8 and more A upshift auxiliary area FU8.In this embodiment, the 8th sprocket wheel SP8 includes that four downshift auxiliary area FD8 and four upshifts are auxiliary Help region FU8.However, the sum of downshift auxiliary area FD8 is not limited to the embodiment.Upshift the total unlimited of auxiliary area FU8 In the embodiment.

As shown in figure 12, the 9th sprocket wheel SP9 includes the 9th sprocket body SP9A and multiple 9th sprocket SP9B.Multiple Nine sprocket SP9B extend radially outwardly relative to center of rotation axis A1 from the 9th sprocket body SP9A.9th sprocket wheel SP9 It is properly termed as bicycle chainwheel SP9.9th sprocket body SP9A is referred to as sprocket body SP9A.Multiple 9th sprockets SP9B is referred to as multiple sprocket SP9B.Therefore, bicycle chainwheel SP9 includes sprocket body SP9A and multiple sprockets SP9B.Multiple sprocket SP9B extend radially outwardly relative to center of rotation axis A1 accessary sprocket wheel main body SP9A.

9th sprocket wheel SP9 includes multiple root portion SP9C.Root portion SP9C be arranged in two adjacent sprocket SP9B it Between.9th sprocket wheel SP9 has the root circle RC9 limited by multiple root portion SP9C.Total number of teeth of bicycle chainwheel SP9 is (multiple The sum of sprocket SP9B) it is equal to or more than 25.In this embodiment, total number of teeth of the 9th sprocket wheel SP9 is 32.However, the 9th The sum of multiple sprocket SP9B of sprocket wheel SP9 is not limited to the embodiment.

Bicycle chainwheel SP9 includes at least one upshift auxiliary area FU9, at least one upshift auxiliary area FU9 construction For auxiliary bike chain C from bicycle chainwheel SP9 direction compared with minor sprocket SP8 gear shift, compared on minor sprocket SP8 in the axial direction D2 It is adjacent with bicycle chainwheel SP9 and therebetween without another sprocket wheel.In this embodiment, bicycle chainwheel SP9 includes multiple liters Shelves auxiliary area FU9.In this embodiment, bicycle chainwheel SP9 includes four upshift auxiliary area FU9.However, upshift auxiliary The sum of region FU9 is not limited to the embodiment.

Bicycle chainwheel SP9 further include be configured to auxiliary bike chain C from compared with minor sprocket SP8 towards bicycle chainwheel At least one downshift auxiliary area FD9 of SP9 gear shift.In this embodiment, bicycle chainwheel SP9 includes multiple downshift auxiliary regions Domain FD9.In this embodiment, bicycle chainwheel SP9 includes four downshift auxiliary area FD9.However, downshift auxiliary area FD9 Sum be not limited to the embodiment.

As shown in figure 13, the tenth sprocket wheel SP10 includes the tenth sprocket body SP10A and multiple tenth sprocket SP10B.It is more A tenth sprocket SP10B extends radially outwardly relative to center of rotation axis A1 from the tenth sprocket body SP10A.Tenth sprocket wheel SP10 includes multiple root portion SP10C.Root portion SP10C is arranged between two adjacent sprocket SP10B.Tenth sprocket wheel SP10 has the root circle RC10 limited by multiple root portion SP10C.Total number of teeth (multiple sprockets of bicycle chainwheel SP10 The sum of SP10B) it is equal to or more than 25.In this embodiment, total number of teeth of the tenth sprocket wheel SP10 is 36.However, the tenth sprocket wheel The sum of multiple sprocket SP10B of SP10 is not limited to the embodiment.

Sprocket wheel SP10 include be configured to auxiliary bike chain C from compared with minor sprocket SP9 towards sprocket wheel

At least one downshift auxiliary area FD10 of SP10 gear shift.Sprocket wheel SP10 includes being configured to auxiliary bike chain C At least one upshift auxiliary area FU10 of the accessary sprocket wheel SP10 direction compared with minor sprocket SP9 gear shift.In this embodiment, the tenth sprocket wheel SP10 includes multiple downshift auxiliary area FD10 and multiple upshift auxiliary area FU10.In this embodiment, the tenth sprocket wheel SP10 Including four downshift auxiliary area FD10 and four upshift auxiliary area FU10.However, the sum of downshift auxiliary area FD10 is not It is limited to the embodiment.The sum of upshift auxiliary area FU10 is not limited to the embodiment.

As shown in figure 14, the 11st sprocket wheel SP11 includes the 11st sprocket body SP11A and multiple 11st sprockets SP11B.Multiple 11st sprocket SP11B relative to center of rotation axis A1 from the 11st sprocket body SP11A radially outward Extend.11st sprocket wheel SP11 includes multiple root portion SP11C.Two adjacent sprocket SP11B are arranged in root portion SP11C Between.11st sprocket wheel SP11 has the root circle RC11 limited by multiple root portion SP11C.Total tooth of bicycle chainwheel SP11 Number (sums of multiple sprocket SP11B) is equal to or more than 25.In this embodiment, total number of teeth of the 11st sprocket wheel SP11 is 40.However, the sum of multiple sprocket SP11B of the 11st sprocket wheel SP11 is not limited to the embodiment.

Sprocket wheel SP11 include be configured to auxiliary bike chain C from compared with minor sprocket SP10 towards sprocket wheel SP11 gear shift at least One downshift auxiliary area FD11.Sprocket wheel SP11 includes being configured to auxiliary bike chain C accessary sprocket wheel SP11 towards compared with minor sprocket At least one upshift auxiliary area FU11 of SP10 gear shift.In this embodiment, the 11st sprocket wheel SP11 includes that multiple downshifts are auxiliary Help region FD11 and multiple upshift auxiliary area FU11.In this embodiment, the 11st sprocket wheel SP11 includes four downshift auxiliary Region FD11 and four upshift auxiliary area FU11.However, the sum of downshift auxiliary area FD11 is not limited to the embodiment.Upshift The sum of auxiliary area FU11 is not limited to the embodiment.

As shown in figure 15, the 12nd sprocket wheel SP12 includes the 12nd sprocket body SP12A and multiple 12nd sprockets SP12B.Multiple 12nd sprocket SP12B relative to center of rotation axis A1 from the 12nd sprocket body SP12A radially outward Extend.12nd sprocket wheel SP12 includes multiple root portion SP12C.Two adjacent sprocket SP12B are arranged in root portion SP12C Between.12nd sprocket wheel SP12 has the root circle RC12 limited by multiple root portion SP12C.Total tooth of bicycle chainwheel SP12 Number (sums of multiple sprocket SP12B) is equal to or more than 41.In this embodiment, total number of teeth of the 12nd sprocket wheel SP12 is 45.But the sum of multiple sprocket SP12B of the 12nd sprocket wheel SP12 is not limited to the embodiment.

Sprocket wheel SP12 include be configured to auxiliary bike chain C from compared with minor sprocket SP11 towards sprocket wheel SP12 gear shift at least One downshift auxiliary area FD12.Sprocket wheel SP12 includes being configured to auxiliary bike chain C accessary sprocket wheel SP12 towards compared with minor sprocket At least one upshift auxiliary area FU12 of SP11 gear shift.In this embodiment, the 12nd sprocket wheel SP12 includes that multiple downshifts are auxiliary Help region FD12 and multiple upshift auxiliary area FU12.In this embodiment, the 12nd sprocket wheel SP12 includes five downshift auxiliary Region FD12 and five upshift auxiliary area FU12.However, the sum of downshift auxiliary area FD12 is not limited to the embodiment.Upshift The sum of auxiliary area FU12 is not limited to the embodiment.

As shown in figure 16, multistage sprocket wheel 12 includes sprocket carrier 14.Sprocket carrier 14 includes flower-drum joint portion 16 With multiple sprocket wheel installing arms 18.Flower-drum joint portion 16 is configured to engage with the sprocket support body 4B of flower-drum component 4.Multiple sprocket wheels Installing arm 18 extends radially outwardly from flower-drum joint portion 16.In this embodiment, the sum of sprocket wheel installing arm 18 is 6.However, chain The sum of wheel installing arm 18 is not limited to the embodiment.

As shown in figure 3, multiple sprocket wheel SP6, sprocket wheel SP7 and sprocket wheel SP9 are to sprocket wheel SP11 fixed to multiple sprocket wheel installing arms 18.Sprocket wheel SP6 is fixed to multiple sprocket wheel installing arms 18 (Figure 16) by multiple fastener F6.Sprocket wheel SP7 passes through multiple fasteners F7 is fixed to multiple sprocket wheel installing arms 18 (Figure 16).Sprocket wheel SP9 is fixed to multiple sprocket wheel installing arms 18 by multiple fastener F9 (Figure 16).Sprocket wheel SP10 is fixed to multiple sprocket wheel installing arms 18 (Figure 16) by multiple fastener F10.Sprocket wheel SP11 passes through multiple Fastener F11 is fixed to multiple sprocket wheel installing arms 18 (Figure 16).Sprocket wheel SP12 is fixed to sprocket wheel SP11 by multiple fastener F12 (Figure 16).

Sprocket wheel SP5 is fixed to sprocket wheel SP6 by multiple fastener F6.It is provided between sprocket wheel SP5 and sprocket wheel SP6 multiple Spacer SC6.Sprocket wheel SP8 is fixed to sprocket wheel SP9 by multiple fastener F9.Multiple intervals are set between sprocket wheel SP8 and SP9 Part SC9.Sprocket wheel SP12 is fixed to sprocket wheel SP11 by multiple fastener F12.It is provided between sprocket wheel SP11 and SP12 multiple Spacer SC12.

Flower-drum joint portion 16 includes flower in the flower-drum for being configured to engage with multiple external spline teeth (not shown) of flower-drum component 4 Key 19.Flower-drum internal spline 19 includes the first flower-drum internal spline 20 and the second flower-drum internal spline 22.In this embodiment, the first flower-drum Internal spline 20 is spaced apart on D2 in the axial direction with the second flower-drum internal spline 22, on D2 in the axial direction in the first flower-drum flower Annular recess 24 is limited between key 20 and the second flower-drum internal spline 22.First flower-drum internal spline 20 may be connected to flower in the second flower-drum Key 22.

First flower-drum internal spline 20 is multiple including being configured to engage with multiple external spline teeth (not shown) of flower-drum component 4 First inner spline gear 28.Second flower-drum internal spline 22 includes being configured to connect with multiple external spline teeth (not shown) of flower-drum component 4 Multiple second inner spline gears 30 closed.

As shown in fig. 7, sprocket wheel SP4 includes internal spline SP4S.Internal spline SP4S include be configured to it is multiple with flower-drum component 4 Multiple inner spline gear SP4H (Fig. 3) of external spline teeth (not shown) engagement.As shown in figure 3, being installed in multistage sprocket wheel 12 In the state of on flower-drum component 4, sprocket wheel SP4 is maintained at flower-drum joint portion 16 and the flower of sprocket carrier 14 on D2 in the axial direction Between the locking component 4A of drum component 4.

As shown in figure 4, sprocket wheel SP1 includes internal spline SP1S.Internal spline SP1S include be configured to it is multiple with flower-drum component 4 Multiple inner spline gear SP1H (Fig. 3) of external spline teeth (not shown) engagement.As shown in figure 3, being installed in multistage sprocket wheel 12 In the state of on flower-drum component 4, sprocket wheel SP1 is maintained at flower-drum joint portion 16 and the flower of sprocket carrier 14 on D2 in the axial direction Between the locking component 4A of drum component 4.

As shown in figure 17, sprocket wheel SP2 includes internal spline SP2S.Internal spline SP2S include be configured to it is more with flower-drum component 4 Multiple inner spline gear SP2H (Fig. 3) of a external spline teeth (not shown) engagement.As shown in figure 3, pacifying in multistage sprocket wheel 12 In the state of on flower-drum component 4, sprocket wheel SP2 is maintained at 16 He of flower-drum joint portion of sprocket carrier 14 on D2 in the axial direction Between the locking component 4A of flower-drum component 4.

As shown in figure 18, sprocket wheel SP3 includes torque transmitting profile SP3F.Torque transmitting profile SP3F includes being configured to and chain Wheel SP2 engagement is to transmit the multiple external spline teeth SP3G for driving rotary force F1.As shown in figure 5, sprocket wheel SP2 includes torque transfer wheel Wide SP2F.Torque transmitting profile SP2F includes being configured to be engaged with multiple external spline teeth SP3G of sprocket wheel SP3 to transmit driving rotation Turn multiple additional inner spline gear SP2G of power F1.

As shown in figure 5, multiple second sprocket SP2B include at least one chain flexes limitation tooth SP2L.In the embodiment In, multiple second sprocket SP2B include chain flexes limitation tooth SP2L.Specifically, including 12 the second sprocket SP2B Second sprocket wheel SP2 includes that a chain flexes limit tooth SP2L.However, limiting tooth SP2L instead of chain flexes or in addition to chain Except bending limitation tooth SP2L, multiple second sprocket SP2B may include another chain flexes limitation tooth.

As shown in figure 19, at least one chain flexes limitation tooth SP2L has chain flexes limiting surface SP2L1.Chain is curved Bent limiting surface SP2L1 is configured to limit tooth SP2L towards the first sprocket wheel SP1 from least one chain flexes in bicycle chain C Under inclined chain heeling condition, relative to the interior chain for supporting bicycle chain C on center of rotation axis A1 in the axial direction D2 The opposite of bicycle chain C is arranged in prevent one (for example, SP1R) in multiple first sprocket SP1B to be engaged in plate C1 A pair of of outer plate C2 between outer chain space C2A in.Chain flexes limiting surface SP2L1 contacts inner plate C1, voluntarily Blockchain C passes through derailleur (not shown) from the second sprocket wheel SP2 into the downshift operation of the first sprocket wheel SP1 gear shift, and limitation is opposite A pair of of outer plate C2 axial movement.

As shown in figure 20, chain flexes limiting surface SP2L1 is arranged in the second bicycle outer surface SP2F.At least one A chain flexes limitation tooth SP2L has the chamfered part SP2L2 being arranged in the second bicycle outer surface SP2F.

As shown in figure 21, chain flexes limiting surface SP2L1 relative to center of rotation axis A1 in radial directions at least Partly extend.Chain flexes limiting surface SP2L1 is arranged radially in chamfered part SP2L2 relative to center of rotation axis A1 Inside.Chain flexes limiting surface SP2L1 is arranged radially in the outside of root circle RC2 relative to center of rotation axis A1.

Chain flexes limiting surface SP2L1 is arranged in radial teeth area TR relative to center of rotation axis A1.Radial teeth area TR has the radially end TR1 and radially innermost end TR2 relative to center of rotation axis A1.Radial teeth area TR is arranged in tooth root The radial outside of circle RC2.The diameter of the radially innermost end TR2 of radial teeth area TR is arranged in the radially end TR1 of radial teeth area TR Outward.

In radially holding between the TR1 and root circle RC2 of the second sprocket wheel SP2 relative to rotation center for radial teeth area TR The first radial distance RD1 that axis A1 is limited is 4.5mm.The radially innermost end TR2 of TR and the second sprocket wheel SP2 in radial teeth area The the second radial distance RD2 limited between root circle RC2 relative to center of rotation axis A1 is 2.5mm.First radial distance RD1 The radially end TR1 of radial teeth area TR is radially outward limited to from root circle RC2.Second radial distance RD2 is from root circle RC2 Radially outward it is limited to the radially innermost end TR2 of radial teeth area TR.However, radial teeth area TR is not limited to the embodiment.

In this embodiment, chain flexes limiting surface SP2L1 does not extend at least one chain flexes limitation tooth SP2L Tooth top SP2L3.When observing along center of rotation axis A1, chamfered part SP2L2 is arranged in chain flexes limiting surface Between SP2L1 and the tooth top SP2L3 of chain flexes limitation tooth SP2L.However, as shown in figure 22, chain flexes limiting surface SP2L1 can extend to the tooth top SP2L3 of at least one chain flexes limitation tooth SP2L.In this variant, chamfered part SP2L2 It is omitted from chain flexes limitation tooth SP2L.

As shown in Figure 20 and Figure 21, chain flexes limitation tooth SP2L includes upstream face SP2L6 and downstream surface SP2L7. Upstream face SP2L6 is arranged on the upstream side of chain flexes limiting surface SP2L1 along rotation driving direction D11.Downstream surface SP2L7 is arranged on the downstream side of chain flexes limiting surface SP2L1 along rotation driving direction D11.Upstream face SP2L6 connection To chain flexes limiting surface SP2L1 and chamfered part SP2L2.Downstream surface SP2L7 is connected to chain flexes limiting surface SP2L1 and chamfered part SP2L2.

As shown in figure 23, at least one chain flexes limitation tooth SP2L, which has, is arranged in the second bicycle inner surface SP2E In additional chamfered part SP2L4.It is omitted however, additional chamfered part SP2L4 can be limited in tooth SP2L from chain flexes.Chain Item bending limitation tooth SP2L includes additional downstream surface SP2L8.Additional downstream surface SP2L8 is along rotation driving direction D11 setting On the downstream side of chain flexes limitation tooth SP2L.Additional downstream surface SP2L8 is connected to additional chamfered part SP2L4.

As shown in figure 24, chamfered part SP2L2 is constructed so that the tooth top of at least one chain flexes limitation tooth SP2L SP2L3 is at least partly arranged on D2 in the axial direction from the second bicycle inner surface SP2E ratio from the outside of the second bicycle Surface SP2F is closer.In this embodiment, the tooth top SP2L3 of chain flexes limitation tooth SP2L is partly set as in the axial direction D2 is upper closer from the second bicycle outer surface SP2F from the second bicycle inner surface SP2E ratio.Tooth top SP2L3 includes setting Axial center point CP1 on the circumferential end of tooth top SP2L3.First distance DS1 in axial direction D2 in axial center point CP1 and It is limited between the SP2A1 of surface.In axial direction D2 is limited second distance DS2 between axial center point CP1 and surface SP2A2. In axial direction D2 is arranged in the opposite side of surface SP2A2 surface SP2A1.First distance DS1 is less than second distance DS2. Angle part SP2L2 extends to chain flexes limiting surface from the tooth top SP2L3 of at least one chain flexes limitation tooth SP2L SP2L1。

Chain flexes limit of the axial distance AD relative to center of rotation axis A1 in the second bicycle outer surface SP2F It is limited between control surface SP2L1 and the surface SP2A2 of the second sprocket body SP2A.The range of axial distance AD be 0mm extremely 0.3mm.In this embodiment, axial distance AD is 0.1mm.However, axial distance AD is not limited to the embodiment and above range.

Chain flexes limiting surface SP2L1 from the surface SP2A2 of the second sprocket body SP2A in axial direction D2 towards the Two bicycle inner surface SP2E offset.However, as shown in figure 25, chain flexes limiting surface SP2L1 can be far from second It is deviated on the axial direction D2 of bicycle inner surface SP2E from the surface SP2A2 of the second sprocket body SP2A.

As shown in figure 26, the second sprocket body SP2A has the axial depression relative to center of rotation axis A1 axial depression Part SP2A3.In axial direction D2's axial lowered portion SP2A3 is recessed.Axial lowered portion SP2A3 is arranged in the second bicycle In outer surface SP2F.Axial lowered portion SP2A3 is relative to center of rotation axis A1 from chain flexes limiting surface SP2L1 diameter To inside setting.

As shown in figure 27, at least one chain flexes limitation tooth SP2L have relative to center of rotation axis A1 tooth footpath to Height RH1.The tooth radial height RH1 that at least one chain flexes limits tooth SP2L is greater than other of multiple second sprocket SP2B The radial height RH2 of tooth.Tooth radial height RH1 is radially outward limited to the tooth of chain flexes limitation tooth SP2L from root circle RC2 Push up SP2L3.Radial height RH2 is radially outward limited to the second sprocket SP2M of the second sprocket SP2B from root circle RC2 Tooth top SP2M3.

In this embodiment, for example, difference between tooth radial height RH1 and the radial height RH2 of the second sprocket SP2M For 0.5mm.However, the difference between tooth radial height RH1 and the radial height RH2 of the second sprocket SP2M is not limited to the implementation Example.

As shown in figure 4, multiple sprocket SP1B include multiple chain flexes limitation tooth SP1L.In this embodiment, first Sprocket wheel SP1 includes that 14 sprockets SP1B, 14 sprocket SP1B include that two chain flexes limit tooth SP1L.Such as Fig. 6 Shown, multiple sprocket SP3B include chain flexes limitation tooth SP3L.In this embodiment, third sprocket wheel SP3 includes ten chains The gear teeth SP3B, ten sprocket SP3B include that a chain flexes limit tooth SP3L.As shown in fig. 7, multiple sprocket SP4B packets Include multiple chain flexes limitation tooth SP4L.In this embodiment, the 4th sprocket wheel SP4 include 16 sprocket SP4B, 16 Sprocket SP4B includes that two chain flexes limit tooth SP4L.Chain flexes limit tooth SP1L, chain flexes limitation tooth SP3L and Chain flexes, which limit tooth SP4L, has the structure basically same structure that tooth SP2L is limited with the chain flexes of the second sprocket wheel SP2. Chain flexes limit tooth SP3L with the structure basically same structure with variation example shown in Figure 22.Therefore, for brevity, It is not detailed herein.

As shown in figure 4, multiple first sprocket SP1B are including the first downshift original tooth SP1N and relative to Pivot axle The first axis recess tooth SP1R of line A1 axial depression.First downshift original tooth SP1N is configured in bicycle chain C from smaller Sprocket wheel SP2 receives bicycle chain C into the downshift operation of the first sprocket wheel SP1 gear shift first.First axis recess tooth SP1R structure It makes to reduce the interference between the second sprocket wheel SP2 and bicycle chain C in downshift operation.

First axis be recessed tooth SP1R rotation driving direction D11 downstream side on first downshift original tooth SP1N phase Neighbour, therebetween without another tooth.First downshift original tooth SP1N and first axis recess tooth SP1R setting at least one first In downshift auxiliary area FD1.In this embodiment, multiple first sprocket SP1B include it is multiple first downshift original tooth SP1N and Multiple first axis recess teeth

SP1R.However, the sum of the first downshift original tooth SP1N is not limited to the embodiment.First axis is recessed tooth SP1R's Sum is not limited to the embodiment.

As shown in figure 28, in this embodiment, first axis recess tooth SP1R, which has, is arranged on the outside of the first bicycle table Recess S P1R1 on the SP1F of face.Recess S P1R1 from the first bicycle outer surface SP1F in axial direction D2 to the first bicycle Inner surface SP1E recess.

As shown in figure 19, when from the axial direction D2 relative to center of rotation axis A1, at least one chain is curved Song limitation tooth SP2L is set as adjacent with first axis recess tooth SP1R on the downstream side of rotation driving direction D11, does not have therebetween There is another tooth.Chain flexes limiting surface SP2L1 is configured in bicycle chain C from chain flexes limitation tooth SP2L towards the Under the one inclined chain heeling condition of axial depression tooth SP1R, the inner plate C1 of bicycle chain C is supported on D2 in the axial direction, To prevent first axis recess tooth SP1R to be engaged in the exterior chain between opposite a pair of of outer plate C2 that bicycle chain C is arranged in In the C2A of space.

As shown in figure 4, multiple sprocket SP1B include at least one axis relative to center of rotation axis A1 axial depression To recess upshift original tooth SP1U.In this embodiment, at least one axial depression upshift original tooth SP1U includes multiple axial directions Recess upshift original tooth SP1U.Specifically, at least one axial depression upshift original tooth SP1U includes first axis recess upshift Original tooth SP1UA and the second axial depression upshift original tooth SP1UB.However, the sum of axial depression upshift original tooth SP1U is not It is limited to the embodiment.

At least one axial depression upshifts original tooth SP1U setting at least one upshift auxiliary area FU1.At least one A axial depression upshift original tooth SP1U is configured in bicycle chain C from bicycle chainwheel SP1 towards compared with minor sprocket SP2 gear shift Upshift operation during make the inner plate C1 of bicycle chain C from least one axial depression upshift original tooth SP1U disengaging connect It closes.

Axial depression upshift original tooth SP1U is configured to change in bicycle chain C from the first sprocket wheel SP1 to compared with minor sprocket SP2 It is detached from bicycle chain C at axial depression upshift original tooth SP1U from the first sprocket wheel SP1.Axis It is configured in upshift operation take off from opposite a pair of of inner plate C1 of bicycle chain C first to recess upshift original tooth SP1U From engagement.Because the axial width of opposite a pair of of outer plate C2 is greater than the axial width of opposite a pair of of inner plate C1, Axial depression upshift original tooth SP1U is not configured in upshift operation first from opposite a pair of of outer plate of bicycle chain C C2 is disengaged.

Multiple sprocket SP1B include that the last chain adjacent at least one axial depression upshift original tooth SP1U engages Tooth SP1T.Last chain engaging teeth SP1T is initial at least one axial depression upshift relative to rotation driving direction D11 setting On the downstream side of tooth SP1U.Last chain engaging teeth SP1T is configured in upshift operation finally from the exterior chain of bicycle chain C Plate C2 is disengaged.In this embodiment, multiple sprocket SP1B include last chain engaging teeth SP1T.Last chain engaging teeth SP1T setting is in upshift auxiliary area FU9.

Multiple sprocket SP1B include at least one axial depression tooth SP1P, at least one axial depression tooth SP1P is opposite In first at least one axial depression upshift relative to rotation driving direction D11 on the circumferential direction D1 of center of rotation axis A1 It is adjacent at least one axial depression upshift original tooth SP1U on the upstream side of beginning tooth SP1U, therebetween without another tooth.At this In embodiment, multiple sprocket SP1B include multiple axial depression tooth SP1P.However, the sum of axial depression tooth SP1P is not limited to The embodiment.

Axial depression tooth SP1P is configured in bicycle chain C from the first sprocket wheel SP1 to the upshift compared with minor sprocket SP2 gear shift The interference between the first sprocket wheel SP1 and bicycle chain C is reduced in operation.Axial depression tooth SP1P setting is in upshift auxiliary area In FU1.

As shown in Figure 29 and Figure 30, at least one axial depression upshift original tooth SP1U includes driving surface SP1U1, non-drive Dynamic surface SP1U2 and tip portion SP1U3.Driving surface SP1U1 includes driving surface side tooth tip E11.Non-driven surface SP1U2 includes non-driven surface side tooth tip E12.Tip portion SP1U3 connection driving surface side tooth tip E11 and non-driven table Surface side tooth tip E12.Driving surface side tooth tip E11 is arranged at the radially end of driving surface SP1U1.Non-driven surface Side tooth tip E12 is arranged at the radially end of non-driven surface SP1U2.

As shown in figure 29, non-driven surface SP1U2 is from non-driven surface side tooth tip E12 along relative to center of rotation axis The circumferential direction D1 of A1 extends.Non-driven surface SP1U2 includes relative to center of rotation axis A1 from non-driven surface side tooth top The non-driven protrusion of surface SP1U4 that end E12 is disposed radially inwardly.Non-driven protrusion of surface SP1U4 has protrusion tip SP1U5. The radially inner side of non-driven surface side tooth tip E12 is arranged in relative to center of rotation axis A1 by protrusion tip SP1U5.Protrusion point The radial outside of the root circle RC1 of bicycle chainwheel SP1 is arranged in relative to center of rotation axis A1 by end SP1U5.

As shown in Figure 31 and Figure 32, protrusion tip SP1U5 is set as than non-driven surface side tooth top on D2 in the axial direction E12 is held closer to second to be axially facing surface SP1A2, so that lead-in chamfered SP1U6 is from protrusion tip SP1U5 towards first axis Extend towards surface SP1A1.Lead-in chamfered SP1U6 is arranged on non-driven protrusion of surface SP1U4 and in the axial direction on D2 It is closer towards surface SP1A1 ratio surface SP1A2 to be axially facing from second from first axis.

As shown in figure 33, bicycle chain C includes inner plate C1 and outer plate C2.Inner plate C1 includes link ends in first Part C11, link ends part C12 in second, and link ends part C12 in link ends part C11 and second in first is mutual The interior chain middle section C13 being connected.Link ends part C11 has in the longitudinal centre line relative to inner plate C1 in first First longitudinal direction on the longitudinal direction D3 of CL1 extends edge C 11A.First longitudinal direction extend edge C 11A D3 along the longitudinal direction from Extend on the first longitudinal direction direction D31 that link ends part C12 is limited towards link ends part C11 in first in second.In first Link ends part C11 includes chain open C 11B in have the first central axis CA11 first.Link ends part C12 packet in second Include chain open C 12B in second with the second central axis CA12.Longitudinal centre line CL1 and the first central axis CA11 and Two central axis CA12 intersection.Longitudinal direction D3 is parallel to longitudinal centre line CL1.

Link ends part C12 on longitudinal direction D3 there is second longitudinal direction to extend edge C 12A in second.Second longitudinal direction is prolonged To be partially toward link ends part C12 in second is limited second vertical for the link ends out of first in D3 along the longitudinal direction by long edge C12A Extend on the D32 of direction.

As shown in figure 34, first longitudinal direction extends one that edge C 11A is configured in multiple sprocket SP1B and is positioned at Under the engagement state in outer chain space C2A limited between a pair of of outer plate C2 of bicycle chain C, propped up on D2 in the axial direction Support one in multiple sprocket SP1B of bicycle chainwheel SP1.Second longitudinal direction extends edge C 12A and is configured in multiple sprocket wheels One in the tooth SP1B joint shape being positioned in the outer chain space C2A limited between a pair of of outer plate C2 of bicycle chain C Under state, one in multiple sprocket SP1B of bicycle chainwheel SP1 is supported on D2 in the axial direction.

As shown in Figure 35 and Figure 36, the lead-in chamfered SP1U6 of non-driven protrusion of surface SP1U4 is in bicycle chain C from certainly The sprocket wheel SP1 that drives a vehicle extends into the upshift operation compared with minor sprocket SP2 gear shift with the first longitudinal direction of the inner plate C1 of bicycle chain C Edge C 11A is accessible.Therefore, non-driven protrusion of surface SP1U4 guides bicycle chain C with lead-in chamfered SP1U6, so that axis In the outer chain space C2A for entering opposite a pair of of outer plate C2 in upshift operation to recess upshift original tooth SP1U (SP1UA). In upshift operation, axial depression upshifts original tooth SP1U (SP1UB) first from opposite a pair of of inner plate of bicycle chain C C1 is disengaged.

The sprocket of other sprocket wheels may include the structure of the axial depression upshift original tooth SP1U of sprocket wheel SP1.For example, as schemed Shown in 5, multiple sprocket SP2B include relative at the beginning of at least one axial depression upshift of center of rotation axis A1 axial depression Beginning tooth SP2U.In this embodiment, at least one axial depression upshift original tooth SP2U includes that multiple axial depression upshifts are initial Tooth SP2U.Specifically, at least one axial depression upshift original tooth SP2U include first axis recess upshift original tooth SP2UA and Second axial depression upshift original tooth SP2UB.However, the sum of axial depression upshift original tooth SP2U is not limited to the embodiment.

As shown in fig. 7, multiple sprocket SP4B include at least one axis relative to center of rotation axis A1 axial depression To recess upshift original tooth SP4U.In this embodiment, at least one axial depression upshift original tooth SP4U includes multiple axial directions Recess upshift original tooth SP4U.Specifically, at least one axial depression upshift original tooth SP4U includes first axis recess upshift Original tooth SP4UA and the second axial depression upshift original tooth SP4UB.However, the sum of axial depression upshift original tooth SP4U is not It is limited to the embodiment.

As shown in figure 8, multiple sprocket SP5B include at least one axis relative to center of rotation axis A1 axial depression To recess upshift original tooth SP5U.In this embodiment, at least one axial depression upshift original tooth SP5U includes multiple axial directions Recess upshift original tooth SP5U.Specifically, at least one axial depression upshift original tooth SP5U includes first axis recess upshift Original tooth SP5UA and the second axial depression upshift original tooth SP5UB.However, the sum of axial depression upshift original tooth SP5U is not It is limited to the embodiment.

As shown in figure 9, multiple sprocket SP6B include at least one axis relative to center of rotation axis A1 axial depression To recess upshift original tooth SP6U.In this embodiment, at least one axial depression upshift original tooth SP6U includes multiple axial directions Recess upshift original tooth SP6U.Specifically, at least one axial depression upshift original tooth SP6U includes first axis recess upshift Original tooth SP6UA, the second axial depression upshift original tooth SP6UB and third axial depression upshift original tooth SP6UC.However, axis The embodiment is not limited to the sum of recess upshift original tooth SP6U.

As shown in Figure 10, multiple sprocket SP7B include at least one axis relative to center of rotation axis A1 axial depression To recess upshift original tooth SP7U.In this embodiment, at least one axial depression upshift original tooth SP7U includes multiple axial directions Recess upshift original tooth SP7U.Specifically, at least one axial depression upshift original tooth SP7U includes first axis recess upshift Original tooth SP7UA, the second axial depression upshift original tooth SP7UB and third axial depression upshift original tooth SP7UC.However, axis The embodiment is not limited to the sum of recess upshift original tooth SP7U.

As shown in figure 11, multiple sprocket SP8B include at least one axis relative to center of rotation axis A1 axial depression To recess upshift original tooth SP8U.In this embodiment, at least one axial depression upshift original tooth SP8U includes multiple axial directions Recess upshift original tooth SP8U.Specifically, at least one axial depression upshift original tooth SP8U includes first axis recess upshift Original tooth SP8UA, the second axial depression upshift original tooth SP8UB, third axial depression upshift original tooth SP8UC and the 4th axis To recess upshift original tooth SP8UD.However, the sum of axial depression upshift original tooth SP8U is not limited to the embodiment.

Axial depression upshifts original tooth SP2U to axial depression upshift original tooth SP8U with the axial depression with sprocket wheel SP1 The structure basically same structure of upshift original tooth SP1U.Therefore, for brevity, will not be described in detail further here.

The sprocket of other sprocket wheels may include sprocket wheel SP1 first downshift original tooth SP1N, first axis recess tooth SP1R, The structure of axial depression tooth SP1P and last chain engaging teeth SP1T.For example, as shown in figure 5, multiple sprocket SP2B include the One downshift original tooth SP2N, first axis recess tooth SP2R, multiple axial depression tooth SP2P and multiple last chain engaging teeths SP2T.As shown in fig. 7, multiple sprocket SP4B include multiple first downshift original tooth SP4N, multiple first axis recess tooth SP4R, multiple axial depression tooth SP4P and multiple last chain engaging teeth SP4T.As shown in figure 8, multiple sprocket SP5B packets Include it is multiple first downshift original tooth SP5N, multiple first axis recess tooth SP5R, multiple axial depression tooth SP5P and it is multiple most Rear chain engaging tooth SP5T.As shown in figure 9, multiple sprocket SP6B include multiple first downshift original tooth SP6N, multiple first Axial depression tooth SP6R, multiple axial depression tooth SP6P and multiple last chain engaging teeth SP6T.As shown in Figure 10, Duo Gelian Gear teeth SP7B includes multiple first downshift original tooth SP7N, multiple first axis recess tooth SP7R, multiple axial depression tooth SP7P And multiple last chain engaging teeth SP7T.As shown in figure 11, multiple sprocket SP8B include multiple first downshift original tooths SP8N, multiple first axis recess tooth SP8R, multiple axial depression tooth SP8P and multiple last chain engaging teeth SP8T.

The first downshift downshift of original tooth SP2N to first original tooth SP8N has the first downshift original tooth with sprocket wheel SP1 The structure basically same structure of SP1N.First axis recess tooth SP2R has to first axis recess tooth SP8R and sprocket wheel SP1 First axis recess tooth SP1R structure basically same structure.Axial depression tooth SP2P to axial depression tooth SP8P have with The structure basically same structure of the axial depression tooth SP1P of sprocket wheel SP1.Last chain engaging teeth SP2T is engaged to last chain Tooth SP8T has the structure basically same structure with the last chain engaging teeth SP1T of sprocket wheel SP1.Therefore, for brevity, Here it will not be described in detail further.

As shown in figure 12, multiple sprocket SP9B include center tooth SP9M and relative to center of rotation axis A1 axial depression At least one axial depression upshift tooth SP9X.At least one axial depression upshifts tooth SP9X setting at least one upshift auxiliary In the FU9 of region.Axial depression upshift tooth SP9X is configured to change in bicycle chain C from bicycle chainwheel SP9 to compared with minor sprocket SP8 The interference between bicycle chainwheel SP9 and bicycle chain C is reduced in the upshift operation of shelves.In this embodiment, multiple sprocket wheels Tooth SP9B includes multiple axial depression upshift tooth SP9X.Axial depression upshifts tooth SP9X setting in upshift auxiliary area FU9.So And the sum of axial depression upshift tooth SP9X is not limited to the embodiment.

Multiple sprocket SP9B include at least one axial depression downshift relative to center of rotation axis A1 axial depression Tooth SP9D.At least one axial depression downshifts tooth SP9D setting at least one downshift auxiliary area FD9.Axial depression downshift Tooth SP9D is configured to reduce voluntarily from compared with minor sprocket SP8 into the downshift operation of bicycle chainwheel SP9 gear shift in bicycle chain C Interference between blockchain wheel SP9 and bicycle chain C.In this embodiment, multiple sprocket SP9B include multiple axial depressions Downshift tooth SP9D.Axial depression downshifts tooth SP9D setting in downshift auxiliary area FD9.The tooth SP9D however, axial depression downshifts Sum be not limited to the embodiment.Axial depression downshift tooth SP9D has and the first axis of sprocket wheel SP1 is recessed tooth SP1R (Fig. 4) Structure basically same structure.

As shown in figure 12, center tooth SP9M can be constructed to bicycle chain C from compared with minor sprocket SP8 to bicycle chain Take turns the axial depression downshift that the interference between bicycle chainwheel SP9 and bicycle chain C is reduced in the downshift operation of SP9 gear shift Tooth.Multiple sprocket SP9B include being configured in bicycle chain C from the drop compared with minor sprocket SP8 to bicycle chainwheel SP9 gear shift Multiple downshift original tooth SP9N of bicycle chain C are received in shelves operation first.The original tooth SP9N setting that downshifts is assisted in downshift In the FD9 of region.

Multiple sprocket SP9B include multiple first disengagings tooth SP9Y, multiple second disengaging tooth SP9Q and multiple upshifts auxiliary Tooth SP9Z.First disengaging tooth SP9Y is configured to the bicycle chain C in the first chain phase from bicycle chainwheel SP9 to smaller It is detached from bicycle chain C from bicycle chainwheel SP9.Second is detached from tooth SP9Q structure It makes as the bicycle chain C in the second chain phase for being different from the first chain phase from bicycle chainwheel SP9 to compared with chainlet Taking turns in the upshift operation of SP8 gear shift is detached from bicycle chain C from bicycle chainwheel SP9.Second is detached from tooth SP9Q construction For in upshift operation auxiliary bike chain C upshift assist tooth SP9Z at from bicycle chainwheel SP9 be detached from.Upshift assist tooth SP9Z is configured to finally be disengaged from bicycle chain C in the upshift operation in the second chain phase.Second is detached from tooth SP9Q is configured to finally be disengaged from bicycle chain C in the upshift operation in the first chain phase.First is detached from tooth SP9Y, second are detached from tooth SP9Q and upshift assist tooth SP9Z setting in upshift auxiliary area FU9.

Axial depression upshifts tooth SP9X with essentially identical with the function of the axial depression tooth SP1P (Fig. 4) of sprocket wheel SP1 Function.Therefore, axial depression upshift tooth SP9X is considered axial depression tooth SP9X.First, which is detached from tooth SP9Y and second, takes off There is the function essentially identical with the function of the axial depression of sprocket wheel SP1 upshift original tooth SP1U (Fig. 4) from tooth SP9Q.Therefore, First disengaging tooth SP9Y and the second disengaging tooth SP9Q are considered axial depression upshift original tooth SP9Y and axial depression liter Shelves original tooth SP9Q.Second is detached from tooth SP9Q and upshift assist tooth SP9Z with the last chain engaging teeth SP1T with sprocket wheel SP1 The essentially identical function of the function of (Fig. 4).Therefore, the second disengaging tooth SP9Q and upshift assist tooth SP9Z are considered finally Chain engaging teeth SP9Q and last chain engaging teeth SP9Z.

As shown in figure 3, sprocket body SP9A includes that first axis towards surface SP9E and second is axially facing surface SP9F. First axis is axially facing center of rotation axis A1 of the surface SP9F relative to bicycle chainwheel SP9 towards surface SP9E and second Towards axial direction D2.Second is axially facing surface SP9F, and in axial direction phase of the first axis towards surface SP9E is arranged in D2 On tossing about.First axis is configured to below the assembled state that bicycle chainwheel SP9 is installed to bicycle 10 towards surface SP9E To the central plane 10A (Fig. 1) of bicycle 10.

As shown in figure 37, at least one axial depression upshift tooth SP9X is on the downstream side of rotation driving direction D11 in Raker tooth SP9M is adjacent, therebetween without another tooth.Axial depression upshifts the edge tooth SP9X rotation driving direction D11 setting in center tooth On the downstream side of SP9M.At least one axial depression downshift tooth SP9D rotation driving direction D11 upstream side on center tooth SP9M is adjacent, therebetween without another tooth.Axial depression downshifts the edge tooth SP9D rotation driving direction D11 setting in center tooth SP9M Upstream side on.However, it is possible to along circumferential direction D1 axial depression downshift tooth SP9D and center tooth SP9M between be arranged it is another A tooth.

Center tooth SP9M includes driving tip portion SP9M1, driving surface linear segment SP9M2 and non-driven surface linear Part SP9M3.Driving surface linear segment SP9M2 has in driving surface linear segment SP9M2 and from center of rotation axis A1 Extend to the driving surface limited between the first radial line RL1 of the radially outermost edge E1 of driving surface linear segment SP9M2 Angle A G1.Non-driven surface linear part SP9M3 has in non-driven surface linear part SP9M3 and from center of rotation axis A1 extends to the non-drive limited between the second radial line RL2 of the radially outermost edge E2 of non-driven surface linear part SP9M3 Dynamic surface angle AG2.Non-driven surface angle AG2 is greater than driving surface angle A G1.The range of driving surface angle A G1 is 0 degree To 20 degree.The range of non-driven surface angle AG2 is 20 degree to 60 degree.In this embodiment, driving surface angle A G1 is 8 degree, And non-driven surface angle AG2 is 40 degree.However, driving surface angle A G1 is not limited to the embodiment and above range.It is non-driven Surface angle AG2 is not limited to the embodiment and above range.

Bicycle chainwheel SP9 includes being arranged on circumferential direction D1 at least one axial direction relative to center of rotation axis A1 The first non-step inclined plane SP9M4 between recess upshift tooth SP9X and center tooth SP9M.Bicycle chainwheel SP9 further includes in circumferential direction The second non-ladder between at least one axial depression downshift non-step inclined plane SP9M4 of tooth SP9D and first is set on the D1 of direction Inclined-plane SP9M5.However, the second non-step inclined plane SP9M5 can be omitted from bicycle chainwheel SP9.

As shown in figure 38, first axis thickness A T1 is limited to from the first non-step inclined plane SP9M4 on D2 in the axial direction One is axially facing surface SP9E.Second axial width AT2 is limited to from the second non-step inclined plane SP9M5 on D2 in the axial direction One is axially facing surface SP9E.First non-step inclined plane SP9M4 along circumferential direction D1 from center tooth SP9M towards axial depression liter Shelves tooth SP9X extends, to be gradually reduced first axis thickness A T1.Second non-step inclined plane SP9M5 along circumferential direction D1 from first Non- step inclined plane SP9M4 extends towards axial depression downshift tooth SP9D, to be gradually reduced the second axial width AT2.Therefore, first Each of non-non- step inclined plane SP9M5 of step inclined plane SP9M4 and second does not have any ladder.First axis thickness The maximum value of AT1 is equal to the maximum value of the second axial width AT2.Therefore, the first non-step inclined plane SP9M4 is on circumferential direction D1 The second non-step inclined plane SP9M5 is smoothly connected to without any ladder.

Driving tip portion SP9M1 is at least partly arranged on D2 in the axial direction from first axis towards surface SP9E It is more closer than being axially facing surface SP9F from second.In this embodiment, driving tip portion SP9M1 is partly set as in axial direction It is closer from first axis towards surface SP9E ratio surface SP9F to be axially facing from second on the D2 of direction.

As shown in figure 13, multiple sprocket SP10B include multiple center tooth SP10M, multiple axial depressions upshift tooth SP10X, multiple axial depressions downshift tooth SP10D, multiple downshift original tooth SP10N, multiple first are detached from tooth SP10Y, Duo Ge Two are detached from tooth SP10Q and multiple upshift assist tooth SP10Z.As shown in figure 14, multiple sprocket SP11B include multiple center tooths It is SP11M, multiple axial depressions upshift tooth SP11X, multiple axial depressions downshift tooth SP11D, multiple downshift original tooth SP11N, more A first is detached from tooth SP11Y, multiple second disengaging tooth SP11Q and multiple upshift assist tooth SP11Z.As shown in figure 15, Duo Gelian Gear teeth SP12B include multiple center tooth SP12M, multiple axial depressions upshift tooth SP12X, multiple axial depressions downshift tooth SP12D, Multiple downshift original tooth SP12N, multiple first are detached from tooth SP12Y, multiple second disengaging tooth SP12Q and multiple upshift assist tooths SP12Z。

Axial depression upshift tooth SP10X, axial depression upshift tooth SP11X and axial depression upshift tooth SP12X have and chain Take turns the structure basically same structure of the axial depression upshift tooth SP9X of SP9.Therefore, axial depression upshift tooth SP10X, axial direction are recessed It falls into upshift tooth SP11X and axial depression upshift tooth SP12X is considered axial depression tooth SP10X, axial depression tooth SP11X With axial depression tooth SP12X.Axial depression downshift tooth SP10D, axial depression downshift tooth SP11D and axial depression downshift tooth SP12D has the structure basically same structure with the axial depression of sprocket wheel SP9 downshift tooth SP9D.Downshift original tooth SP10N, drop Shelves original tooth SP11N and downshift original tooth SP12N have the knot essentially identical with the structure of the downshift original tooth SP9N of sprocket wheel SP9 Structure.First disengaging tooth SP10Y, the first disengaging tooth SP11Y and the first disengaging tooth SP12Y, which have, is detached from tooth with the first of sprocket wheel SP9 The structure basically same structure of SP9Y.Therefore, first tooth SP10Y, the first disengaging tooth SP11Y and the first disengaging tooth are detached from SP12Y is considered axial depression upshift original tooth SP10Y, axial depression upshift original tooth SP11Y and axial depression liter Shelves original tooth SP12Y.Second is detached from tooth SP10Q, the second disengaging tooth SP11Q and second is detached from tooth SP12Q with sprocket wheel SP9's Second is detached from the structure basically same structure of tooth SP9Q.Therefore, second tooth SP10Q, the second disengaging tooth SP11Q and second are detached from It is detached from tooth SP12Q and is considered axial depression upshift original tooth SP10Q, axial depression upshift original tooth SP11Q and axial direction Recess upshift original tooth SP12Q, or last chain engaging teeth SP10Q, last chain engaging teeth SP11Q and the engagement of last chain Tooth SP12Q.Assist tooth SP10Z, upshift assist tooth SP11Z and upshift assist tooth SP12Z upshift with auxiliary with the upshift of sprocket wheel SP9 Help the structure basically same structure of tooth SP9Z.Therefore, upshift assist tooth SP10Z, upshift assist tooth SP11Z and upshift assist tooth SP12Z is considered last chain engaging teeth SP10Z, last chain engaging teeth SP11Z and last chain engaging teeth SP12Z.Therefore, for brevity, will not be described in detail further here.

Variation example

The structure of the axial depression upshift original tooth SP1U of sprocket wheel SP1 can be applied to sprocket wheel SP9 to sprocket wheel SP12.Such as figure Shown in 39, for example, the structure of axial depression upshift original tooth SP1U can be applied to the sprocket SP9B of sprocket wheel SP9.In the change In type, multiple sprocket SP9B may include relative at the beginning of at least one axial depression upshift of center of rotation axis A1 axial depression Beginning tooth SP9U.Specifically, at least one axial depression upshift original tooth SP9U includes first axis recess upshift original tooth SP9UA, the second axial depression upshift original tooth SP9UB, third axial depression upshift original tooth SP9UC and the 4th axial depression Upshift original tooth SP9UD.

As shown in figure 40, the structure of axial depression upshift original tooth SP1U can be applied to the sprocket of sprocket wheel SP10 SP10B.In this variant, multiple sprocket SP10B may include relative to center of rotation axis A1 axial depression at least one Axial depression upshift original tooth SP10U.Specifically, at least one axial depression upshift original tooth SP10U includes that first axis is recessed Fall into upshift original tooth SP10UA, the second axial depression upshift original tooth SP10UB, third axial depression upshift original tooth SP10UC With the 4th axial depression upshift original tooth SP10UD.

As shown in figure 41, the structure of axial depression upshift original tooth SP1U can be applied to the sprocket of sprocket wheel SP11 SP11B.In this variant, multiple sprocket SP11B may include relative to center of rotation axis A1 axial depression at least one Axial depression upshift original tooth SP11U.Specifically, at least one axial depression upshift original tooth SP11U includes that first axis is recessed Fall into upshift original tooth SP11UA, the second axial depression upshift original tooth SP11UB, third axial depression upshift original tooth SP11UC With the 4th axial depression upshift original tooth SP11UD.

As shown in figure 42, the structure of axial depression upshift original tooth SP1U can be applied to the sprocket of sprocket wheel SP12 SP12B.In this variant, multiple sprocket SP12B may include relative to center of rotation axis A1 axial depression at least one Axial depression upshift original tooth SP12U.Specifically, at least one axial depression upshift original tooth SP12U includes that first axis is recessed Fall into upshift original tooth SP12UA, the second axial depression upshift original tooth SP12UB, third axial depression upshift original tooth SP12UC, 4th axial depression upshift original tooth SP12UD and the 5th axial depression upshift original tooth SP12UE.

In the above-described embodiments, sprocket has axial width substantially identical to one another.However, the axial width of sprocket It can be different from the axial width of another sprocket.For example, sprocket, which can have internal chaining, closes tooth and exterior chain soldered tooth.Outside The axial width of chain soldered tooth is greater than the axial width that tooth is closed in internal chaining.The axial width of exterior chain soldered tooth, which is greater than, to be arranged opposite A pair of of inner plate between axial distance, and be less than and axial distance between opposite a pair of of outer plate be set.Interior chain The axial width of soldered tooth is less than the axial distance of opposite inner plate.

In the above-described embodiments, as shown in Figure 1, crank assemblies 2 include the preceding sprocket wheel 2D as single sprocket wheel.However, bent Handle component 2 may include multiple sprocket wheels.When crank assemblies 2 include the preceding sprocket wheel 2D as single sprocket wheel, bicycle can be saved The weight of power train 11.When crank assemblies 2 include multiple sprocket wheels, the change gear grade of bicycle drivetrain 11 can be increased Sum.

In the above-described embodiments, as shown in figure 43, the combination of total number of teeth of sprocket wheel SP1 to sprocket wheel SP12 is 10,12,14, 16,18,21,24,28,32,36,40 and 45.However, multistage sprocket wheel 12 can have sprocket wheel SP1 to sprocket wheel SP12's Other combinations of total number of teeth.For example, another combination of total number of teeth of sprocket wheel SP1 to sprocket wheel SP12 can be 10,12,14,16, 18,21,24,28,33,39,45 and 51.In the case where the sum of sprocket wheel is 11, total number of teeth of sprocket wheel SP1 to sprocket wheel SP12 Another combination can be 10,12,14,16,18,21,24,28,33,39 and 45.

As used herein term " includes " and its derivative are intended to open-ended term, indicate the feature, The presence of component, assembly unit, group, entirety and/or step, but it is not excluded for feature, component, assembly unit, group that other do not state, whole The presence of body and/or step.This conception of species is also applied for the vocabulary of similar meaning, for example, term " having ", "comprising" and its group New word.

Term " component ", " section ", " portion ", " part ", " element ", " ontology " and " structure " can have when being used as odd number There is the double meaning of single part or multiple portions.

Such as ordinal number of " first " and " second " as described in this application is only to indicate, but do not have any other meaning, For example, particular order etc..In addition, for example, term " first element " does not imply that the presence of " second element ", term " in itself Two element " does not imply that the presence of " first element " in itself.

Other than a pair of of element has the construction of mutually the same shape or structure, the term as used herein " a pair " can To include construction of a pair of of element with shape different from each other or structure.

Term " one (one) ", " one or more " and "at least one" may be used interchangeably herein.

Finally, it is as used herein such as " substantially ", the degree term of " about " and " close " mean modified art Language makes the reasonable departure that final result will not significantly change.All numerical value described in this application can be interpreted Including such as " substantially ", the term of " about " and " close ".

It is apparent that according to the above instruction, many variations and modifications can be made to the present invention.It is therefore to be understood that Within the scope of the appended claims, the present invention is implemented other than can specifically describing herein.