阅读说明：本技术 可低阻力的触发式自润滑多孔材料滚动轴承 (Low-resistance trigger type self-lubricating porous material rolling bearing ) 是由 胡瑞 许春霞 于 2021-08-10 设计创作，主要内容包括：本发明公开了可低阻力的触发式自润滑多孔材料滚动轴承,涉及到轴承技术领域,包括外圈本体和内圈本体,所述外圈本体和所述内圈本体之间设置有保持架,所述保持架内通过保持孔均匀活动安装有多个相适配的滚动体,所述外圈本体内开设有储油腔,所述外圈本体的底部内壁上开设有补油滑槽,所述补油滑槽内滑动安装有与所述滚动体相接触的摩擦补油片,所述摩擦补油片上连接有限定复位单元。本发明通过摩擦补油片、触发控制组件和补油组件的设置,可在滚动体的转动阻力变大时,自动打开出油孔对滚动体进行补油处理,实现了触发式自润滑的目的,可有效保证滚动体处于低阻力有油润滑的运行状态,提高了轴承的使用寿命。(The invention discloses a low-resistance trigger type self-lubricating porous material rolling bearing, which relates to the technical field of bearings and comprises an outer ring body and an inner ring body, wherein a retainer is arranged between the outer ring body and the inner ring body, a plurality of adaptive rolling bodies are uniformly and movably arranged in the retainer through a retaining hole, an oil storage cavity is formed in the outer ring body, an oil supplementing sliding groove is formed in the inner wall of the bottom of the outer ring body, a friction oil supplementing sheet which is in contact with the rolling bodies is arranged in the oil supplementing sliding groove in a sliding mode, and a limiting reset unit is connected to the friction oil supplementing sheet. According to the invention, through the arrangement of the friction oil supplementing sheet, the trigger control assembly and the oil supplementing assembly, when the rotation resistance of the rolling body becomes large, the oil outlet hole can be automatically opened to supplement oil for the rolling body, so that the aim of trigger type self-lubricating is achieved, the rolling body can be effectively ensured to be in a low-resistance oil-lubricated running state, and the service life of the bearing is prolonged.)

1. But trigger formula self-lubricating porous material antifriction bearing of low resistance, including outer lane body (1) and inner circle body (2), its characterized in that: a retainer (3) is arranged between the outer ring body (1) and the inner ring body (2), a plurality of adaptive rolling bodies (4) are uniformly and movably arranged in the retainer (3) through the retaining holes, an oil storage cavity (5) is arranged in the outer ring body (1), an oil supplementing sliding groove is arranged on the inner wall of the bottom of the outer ring body (1), a friction oil-supplementing sheet (6) which is in contact with the rolling body (4) is arranged in the oil-supplementing sliding chute in a sliding way, the friction oil-supplementing sheet (6) is connected with a limited reset unit, the inner wall of the bottom of the oil-supplementing chute is provided with an oil outlet communicated with the oil storage cavity (5), an oil supplementing assembly for opening or closing the oil outlet is connected in the oil storage cavity (5), the oil supplementing assembly is connected with a trigger control assembly which is matched with the friction oil supplementing sheet (6) and used for controlling the operation of the oil supplementing assembly.

2. Low drag trigger self-lubricating porous material rolling bearing according to claim 1, characterized in that: mend oily subassembly including installing vertical pole setting (7) on oil storage chamber (5) bottom inner wall, control lever (8) have been cup jointed in the top of vertical pole setting (7) slip, the top of control lever (8) install with sealing plug (9) of oil outlet hole looks adaptation, the cover is equipped with first spring (10) on vertical pole setting (7), the both ends of first spring (10) respectively with the bottom of control lever (8) with the bottom inner wall of oil storage chamber (5) contacts, control lever (8) with trigger control assembly is connected.

3. Low drag trigger self-lubricating porous material rolling bearing according to claim 2, characterized in that: trigger control assembly includes that sliding sleeve connects and installs it moves pole (11) to mend triggering on the inner wall of oil spout bottom, trigger the top of moving pole (11) rotate install with friction mends triggering ball (12) of oil piece (6) looks adaptation, trigger the bottom that moves pole (11) and extend to in oil storage chamber (5) and install linkage ball (13), trigger move on pole (11) cup joint install with spacing separation blade (14) that oil storage chamber (5) top inner wall contacted, linkage ball (13) through the linkage unit with control lever (8) are connected.

4. Low drag trigger self-lubricating porous material rolling bearing according to claim 3, characterized in that: the linkage unit is including installing support round bar (15) on oil storage chamber (5) lateral part inner wall, it has cup jointed rotation pendulum rod (16) to support to rotate on round bar (15), the bottom of linkage ball (13) with the top of rotating pendulum rod (16) contacts, the one end slip of rotating pendulum rod (16) has cup jointed telescopic link (17), the one end of telescopic link (17) is rotated and is installed on the lateral part of control lever (8).

5. Low drag trigger self-lubricating porous material rolling bearing according to claim 1, characterized in that: limiting the reset unit and including installing two arc limit section of thick bamboo (18) on the oil supplementing chute lateral part inner wall, two equal slidable mounting has the arc to move pole (19) in the arc limit section of thick bamboo (18), two the arc moves the one end of pole (19) and installs jointly on the lateral part of oil piece (6) is mended in the friction, two all be provided with second spring (20) in the arc limit section of thick bamboo (18), two the both ends of second spring (20) respectively with two the arc moves the other end of pole (19) and two the lateral part inner wall of arc limit section of thick bamboo (18) contacts.

6. Low drag trigger self-lubricating porous material rolling bearing according to claim 1, characterized in that: cushion pads (21) are mounted on the inner walls of two sides, far away from each other, of the plurality of holding holes, and smearing holding pieces (22) which are in contact with the rolling bodies (4) are mounted on the side portions of the plurality of cushion pads (21).

7. Low drag trigger self-lubricating porous material rolling bearing according to claim 1, characterized in that: the oil filler point that the lateral part of outer lane body (1) seted up with oil storage chamber (5) are linked together, the screw plug (23) of looks adaptation is installed to the oil filler point internal thread, the tool groove has been seted up to the lateral part of screw plug (23).

8. Low drag trigger self-lubricating porous material rolling bearing according to claim 1, characterized in that: a plurality of reinforcing transverse ribs (24) and a plurality of reinforcing vertical ribs (25) are uniformly arranged on the inner wall of the peripheral side of the oil storage cavity (5).

Technical Field

The invention relates to the technical field of bearings, in particular to a low-resistance trigger type self-lubricating porous material rolling bearing.

Background

The bearing is an important part in the modern mechanical equipment; the main function of the device is to support the mechanical rotator, reduce the friction coefficient in the movement process and ensure the rotation precision; a rolling bearing is a precise mechanical element that reduces friction loss by changing sliding friction between a running shaft and a shaft seat into rolling friction.

Most current antifriction bearing do not have self-lubricating function generally, when it is carrying out the during operation, the part rolling element can not be lubricated, and outer lane and inner circle between the resistance grow, lead to the coefficient of friction increase, can make the rolling element stop rolling even, lead to rolling friction to become sliding friction, make the bearing impaired easily, and life is lower, can't trigger formula according to its self lubricated condition and mend oil, for this reason, but this application discloses trigger formula self-lubricating porous material antifriction bearing of low resistance satisfies people's demand.

Disclosure of Invention

The invention aims to provide a low-resistance trigger type self-lubricating porous material rolling bearing, and aims to solve the problems in the background art.

In order to achieve the above purpose, the present application provides the following technical solutions: a low-resistance triggering type self-lubricating porous material rolling bearing comprises an outer ring body and an inner ring body, a retainer is arranged between the outer ring body and the inner ring body, a plurality of rolling bodies which are matched with each other are uniformly and movably arranged in the retainer through a retaining hole, an oil storage cavity is arranged in the outer ring body, an oil supplementing sliding groove is arranged on the inner wall of the bottom of the outer ring body, a friction oil supplementing sheet which is in contact with the rolling body is arranged in the oil supplementing sliding chute in a sliding way, a limiting reset unit is connected on the friction oil supplementing sheet, an oil outlet communicated with the oil storage cavity is formed in the inner wall of the bottom of the oil supplementing sliding groove, an oil supplementing assembly used for opening or closing the oil outlet is connected in the oil storage cavity, the oil supplementing assembly is connected with a trigger control assembly which is matched with the friction oil supplementing sheet and is used for controlling the operation of the oil supplementing assembly.

Borrow by above-mentioned structure, when the rotation resistance grow of rolling element, it can drive the friction and mend the oil piece and remove, and the oil piece removal is mended in the friction can make the operation of trigger control subassembly, and then can make the operation of mend oil assembly to can open the oil outlet automatically, carry out the automatic oil supplementation processing to the rolling element, realize the purpose of trigger formula self-lubricating, can effectively guarantee that the rolling element is in low resistance has the running state of oil lubrication, improved the life of bearing.

Preferably, mend oily subassembly including installing vertical pole setting on the inner wall of oil storage chamber bottom, the control lever has been cup jointed in the top of vertical pole setting in a sliding manner, the top of control lever install with the sealing plug of oil outlet hole looks adaptation, the cover is equipped with first spring in the vertical pole setting, the both ends of first spring respectively with the bottom of control lever with the bottom inner wall in oil storage chamber contacts, the control lever with trigger control assembly is connected.

Further, through the setting of mend oily subassembly, when the control lever received the drive lapse that triggers the control assembly, can drive the sealing plug lapse, and then can open the oil outlet, mend oily processing to the rolling element, mend oily the completion back, under the spring action of first spring, can make sealing plug automatic re-setting rebound close the oil outlet, prevent that lubricating oil from leaking.

Preferably, the trigger control subassembly includes that sliding sleeve connects to install the pole is moved in the trigger on the inner wall of benefit oil spout bottom, the top that the pole was moved in the trigger rotate install with the ball that triggers of friction benefit oil piece looks adaptation, the bottom that the pole was moved in the trigger extends to the linkage ball is installed in the oil storage intracavity, the trigger move on the pole cup joint install with the spacing separation blade that oil storage chamber top inner wall contacted, the linkage ball through the linkage unit with the control lever is connected.

Further, through the setting of trigger control subassembly, when the rolling element drove the oil piece removal is mended in the friction, the oil piece can contact and the extrusion triggers the ball and moves down, and then can drive to trigger and move the pole and the linkage ball moves down to accessible linkage unit drives the control lever and moves down, has realized the purpose of triggering formula self-lubricating.

Preferably, the connecting unit is including installing support round bar on the oil storage chamber lateral part inner wall, it has cup jointed the rotation pendulum rod to rotate on the support round bar, the bottom of linkage ball with the top that rotates the pendulum rod contacts, the one end slip of rotating the pendulum rod has cup jointed telescopic link, telescopic link's one end is rotated and is installed on the lateral part of control lever.

Furthermore, through the arrangement of the connecting unit, when the linkage ball moves downwards, the rotating swing rod can be extruded to rotate downwards by taking the supporting round rod as a circle center, and then the control rod can be driven by the telescopic connecting rod to move downwards, so that oil is automatically supplemented to the rolling body, and the connecting effect is achieved.

Preferably, limiting the reset unit including installing two arc limit section of thick bamboo on the oil supplementing spout lateral part inner wall, two equal slidable mounting has the arc to move the pole in the arc limit section of thick bamboo, two the arc moves the one end of pole and installs jointly on the lateral part of oil piece is mended in the friction, two all be provided with the second spring in the arc limit section of thick bamboo, two the both ends of second spring respectively with two the arc moves the other end of pole and two the lateral part inner wall of arc limit section of thick bamboo contacts.

Furthermore, through the setting of injecing the reset unit, can play the confined guide effect to the moving direction of friction oil supplementing piece, guarantee that friction oil supplementing piece can stably drive the operation of trigger control subassembly, simultaneously after the completion of mending oil, can make friction oil supplementing piece automatic re-setting, be convenient for carry out the automatic oil supplementing of next trigger formula and handle.

Preferably, the inner walls of two sides of the plurality of holding holes, which are far away from each other, are provided with buffer pads, and the side parts of the plurality of buffer pads are provided with smearing holding pieces which are in contact with the rolling bodies.

Furthermore, through the setting of blotter and scribble the retainer plate, can play the limited guard action to the rolling element, reduce the range of rocking of rolling element, also can be with even the scribbling of lubricating oil on the rolling element simultaneously for rolling element pivoted is more smooth and easy.

Preferably, the lateral part of outer lane body seted up with the oil filler point that the oil storage chamber is linked together, the screw thread end cap of looks adaptation is installed to the oil filler point internal thread, the tool groove has been seted up to the lateral part of screw thread end cap.

Furthermore, through the arrangement of the oil filling hole and the threaded plug, lubricating oil in the oil storage cavity can be supplemented in time, so that the bearing can be continuously used.

Preferably, a plurality of reinforcing transverse ribs and a plurality of reinforcing vertical ribs are uniformly arranged on the inner wall of the peripheral side of the oil storage cavity.

Further, through strengthening horizontal muscle and strengthening the setting of erecting the muscle, can strengthen the bulk strength of outer lane body, prevent to cause the outer lane body to warp because the bearing capacity is too big.

In conclusion, the technical effects and advantages of the invention are as follows:

1. the oil-supplementing device has a reasonable structure, when the rotation resistance of the rolling body becomes large, the rolling body can drive the friction oil-supplementing sheet to move, the friction oil-supplementing sheet can move to enable the trigger control assembly to operate, and further enable the oil-supplementing assembly to operate, so that the oil outlet can be automatically opened, the rolling body is automatically supplemented with oil, the purpose of trigger type self-lubrication is achieved, the rolling body can be effectively ensured to be in a low-resistance oil-lubricated operating state, and the service life of the bearing is prolonged;

2. according to the invention, when the friction oil supplementing sheet moves, the friction oil supplementing sheet can contact and extrude the trigger ball to move downwards, the trigger ball moves downwards and extrudes the rotating swing rod through the trigger moving rod and the linkage ball to rotate downwards by taking the support round rod as a circle center, so that the control rod and the sealing plug can be driven to move downwards through the telescopic connecting rod, the oil outlet is opened, the aim of performing trigger type automatic oil supplementing on the rolling body is fulfilled, and the service life of the bearing is prolonged;

3. according to the invention, after oil supplement is finished, the friction oil supplement sheet can be automatically reset under the action of the elastic force of the second spring, so that the trigger ball can be loosened, at the moment, the sealing plug can be automatically reset to move upwards to close the oil outlet under the action of the elastic force of the first spring, so that lubricating oil leakage is prevented, and meanwhile, the trigger ball can be driven to automatically reset to move upwards, so that the next trigger type automatic oil supplement treatment is convenient;

4. according to the invention, through the arrangement of the buffer pads and the coating retaining pieces, the rolling bodies can be limited and protected, the shaking amplitude of the rolling bodies is reduced, meanwhile, lubricating oil can be uniformly coated on the rolling bodies, so that the rolling bodies can rotate more smoothly, and through the arrangement of the reinforcing transverse ribs and the reinforcing vertical ribs, the overall strength of the outer ring body can be enhanced, and the deformation of the outer ring body caused by overlarge bearing capacity is prevented.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic perspective view of a low-resistance triggered self-lubricating porous material rolling bearing according to an embodiment of the present application;

FIG. 2 is a partially enlarged view of FIG. 1;

FIG. 3 is a sectional structure diagram of the outer ring body in the embodiment of the present application;

FIG. 4 is a sectional view of the outer ring body at another view angle in the embodiment of the present application;

FIG. 5 is a partially enlarged view of FIG. 4;

fig. 6 is a partial schematic front sectional view of an embodiment of the present application.

In the figure: 1. an outer ring body; 2. an inner race body; 3. a holder; 4. a rolling body; 5. an oil storage chamber; 6. rubbing oil supplementing sheets; 7. a vertical upright rod; 8. a control lever; 9. a sealing plug; 10. a first spring; 11. triggering the moving rod; 12. triggering the ball; 13. linkage ball bearings; 14. a limiting baffle plate; 15. a support round bar; 16. rotating the swing rod; 17. a telescopic connecting rod; 18. an arc-shaped limiting cylinder; 19. an arc-shaped moving rod; 20. a second spring; 21. a cushion pad; 22. smearing the holding piece; 23. a threaded plug; 24. reinforcing the transverse ribs; 25. and reinforcing the vertical ribs.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): referring to fig. 1-6, the low-resistance triggering type self-lubricating porous material rolling bearing comprises an outer ring body 1 and an inner ring body 2, and it should be noted that the outer ring body 1 and the inner ring body 2 can be made of any material in the prior art, such as a porous metal material, which has the advantages of small specific gravity, good rigidity, good specific strength, good vibration absorption and sound absorption performance, and is formed by a network structure formed by a plurality of closed pores.

Be provided with holder 3 between outer lane body 1 and the inner circle body 2, have the rolling element 4 of a plurality of looks adaptations through the even movable mounting of holding hole in the holder 3, have seted up oil storage chamber 5 in the outer lane body 1, have seted up the oil supplementing spout on the bottom inner wall of outer lane body 1, and slidable mounting has the friction oil supplementing piece 6 that contacts with rolling element 4 in the oil supplementing spout, and friction oil supplementing piece 6 can be one arbitrary metal friction disc of seting up a plurality of through-holes among the prior art.

Be connected with on the oil piece 6 is mended in friction and prescribe a limit to the reset unit, offer the oil outlet that is linked together with oil storage chamber 5 on the bottom inner wall of benefit oil spout, 5 in-connection in the oil storage chamber have be used for opening or close the benefit oily subassembly of oil outlet, be connected with on the benefit oily subassembly with the friction mend the trigger control subassembly that is used for controlling the operation of benefit oily subassembly of oil piece 6 looks adaptation.

Borrow by above-mentioned structure, when the rolling resistance grow of rolling element 4, it can drive friction and mend oil piece 6 and remove, and friction is mended oil piece 6 and is removed and to be made the operation of trigger control subassembly, and then can make the operation of mend oil assembly to can open the oil outlet automatically, carry out automatic oil supplementation to rolling element 4 and handle, realized the purpose of trigger formula self-lubricating, can effectively guarantee that rolling element 4 is in low resistance has the running state of oil lubrication, improved the life of bearing.

As a preferred embodiment of this embodiment, referring to fig. 4 and 5, the oil supply assembly includes a vertical rod 7 installed on the inner wall of the bottom of the oil storage chamber 5, a control rod 8 is slidably sleeved on the top end of the vertical rod 7, a sealing plug 9 adapted to the oil outlet is installed on the top end of the control rod 8, and the sealing plug 9 may be any one of rubber plugs in the prior art and is fixed to the top end of the control rod 8 by screwing; the cover is equipped with first spring 10 on vertical pole setting 7, and the both ends of first spring 10 contact with the bottom of control lever 8 and the bottom inner wall in oil storage chamber 5 respectively, and control lever 8 is connected with the trigger control subassembly. The benefit that sets up like this is, when control lever 8 received the drive of trigger control subassembly and moves down, can drive sealing plug 9 and move down, and then can open the oil outlet, mends oily processing to rolling element 4, mends oily the completion back, under the spring action of first spring 10, can make sealing plug 9 automatic re-setting rebound close the oil outlet, prevents that lubricating oil from leaking.

In this embodiment, referring to fig. 6, the trigger control assembly includes a trigger moving rod 11 slidably sleeved on the inner wall of the bottom of the oil supplementing chute, a trigger ball 12 adapted to the friction oil supplementing sheet 6 is rotatably mounted at the top end of the trigger moving rod 11, the bottom end of the trigger moving rod 11 extends into the oil storage cavity 5 and is mounted with a linkage ball 13, and the trigger ball 12 may be any one of metal balls in the prior art; the linkage ball 13 triggers and moves and is fitted with the spacing separation blade 14 that contacts with the inner wall of oil storage chamber 5 top on the pole 11, and linkage ball 13 is connected with control lever 8 through the linkage unit. The benefit that sets up like this is, when rolling element 4 drove friction and mends oil piece 6 and removes, friction mends oil piece 6 and can contact and extrude and trigger ball 12 downstream, and then can drive and trigger and move pole 11 and linkage ball 13 downstream to accessible linkage unit drives control lever 8 downstream, has realized the purpose of triggering formula self-lubricating.

In this embodiment, referring to fig. 5, the connection unit includes a supporting rod 15 installed on the inner wall of the side portion of the oil storage chamber 5, a rotating swing rod 16 is rotatably sleeved on the supporting rod 15, the bottom of the linkage ball 13 contacts with the top of the rotating swing rod 16, a telescopic link 17 is slidably sleeved on one end of the rotating swing rod 16, and one end of the telescopic link 17 is rotatably installed on the side portion of the control rod 8. The advantage that sets up like this is, when linkage ball 13 moves down, can extrude to rotate pendulum rod 16 and use support round bar 15 as centre of a circle and rotate downwards, and then accessible telescopic link 17 drives the control lever 8 and moves down, carries out automatic oil supplementation to rolling element 4, has played the connection effect.

As a preferred embodiment of the present embodiment, referring to fig. 6, the limiting and resetting unit includes two arc-shaped limiting cylinders 18 installed on the inner wall of the side portion of the oil supplementing chute, arc-shaped moving rods 19 are installed in the two arc-shaped limiting cylinders 18 in a sliding manner, one ends of the two arc-shaped moving rods 19 are installed on the side portion of the friction oil supplementing sheet 6 together, second springs 20 are installed in the two arc-shaped limiting cylinders 18, and two ends of the two second springs 20 are respectively in contact with the other ends of the two arc-shaped moving rods 19 and the inner wall of the side portion of the two arc-shaped limiting cylinders 18. The benefit that sets up like this is, can mend oil piece 6's moving direction to the friction and play the limited guide effect, guarantees that oil piece 6 can stably drive the operation of trigger control subassembly to mend oil piece friction, simultaneously after mend oil and accomplish, can make 6 automatic re-setting of oil piece are mended in the friction, are convenient for carry out the automatic processing of mending of next trigger formula.

As a preferred embodiment of this embodiment, referring to fig. 1 and 2, cushion pads 21 are mounted on both inner walls of the plurality of holding holes away from each other, and smear holding pieces 22 contacting the rolling bodies 4 are mounted on the side portions of the plurality of cushion pads 21. The advantage of setting up like this can play the limited guard action to rolling element 4, has reduced the range of rocking of rolling element 4, also can be with even the smearing of lubricating oil on rolling element 4 simultaneously for rolling element 4 pivoted is more smooth and easy.

As a preferred embodiment of the present embodiment, referring to fig. 2, an oil filling hole communicating with the oil storage cavity 5 is formed at a side portion of the outer ring body 1, a thread plug 23 adapted to the oil filling hole is installed in an internal thread, and a tool groove is formed at a side portion of the thread plug 23. The advantage of setting up like this is, can be convenient for in time supply the lubricating oil in the oil storage chamber 5, make the bearing can last the use.

As a preferred embodiment of this embodiment, referring to fig. 3, a plurality of reinforcing transverse ribs 24 and a plurality of reinforcing vertical ribs 25 are uniformly mounted on the circumferential inner wall of the oil reservoir chamber 5. The advantage of this setting is, can strengthen the bulk strength of outer lane body 1, prevents to cause outer lane body 1 to warp because the bearing capacity is too big.

The working principle of the invention is as follows:

in the process that the bearing carries out work, when the rotational resistance grow of rolling element 4, it can drive friction and mend oil piece 6 and remove, and then can contact and extrude and trigger ball 12 downstream, trigger ball 12 downstream can move pole 11 and linkage ball 13 extrusion rotation pendulum rod 16 through triggering and use support round bar 15 as centre of a circle and rotate downwards, thereby accessible telescopic link 17 drives control lever 8 and sealing plug 9 downstream, open the oil outlet, the realization is triggered the automatic mesh of mending oil to rolling element 4, can effectively guarantee that rolling element 4 is in low resistance has the running state of oil lubrication, the life of bearing has been improved.

After the completion of mend oil, under the spring action of second spring 20, can make the friction mend oil piece 6 automatic re-setting, and then can loosen triggering ball 12, at this moment, under the spring action of first spring 10, can make sealing plug 9 automatic re-setting rebound close the oil outlet, prevent that lubricating oil from leaking, also can drive simultaneously and trigger ball 12 automatic re-setting rebound, be convenient for carry out the automatic oil processing of mending of next time.

Through blotter 21 and the setting of scribbling retaining piece 22, can play the limited guard action to rolling element 4, reduced rolling element 4's amplitude of rocking, also can be with the even smearing of lubricating oil on rolling element 4 simultaneously for rolling element 4 pivoted is more smooth and easy, and through strengthening horizontal muscle 24 and strengthening the setting of erecting muscle 25, can strengthen outer lane body 1's bulk strength, prevents to cause outer lane body 1 to warp because the bearing capacity is too big.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.