阅读说明：本技术 密封齿形链 (Sealed tooth chain ) 是由 甘启强 姚胜强 吴永忠 鲍晓萍 姚国平 于 2021-01-13 设计创作，主要内容包括：密封齿形链,包括外链板、内链板,所述外链板、内链板通过销轴连接形成齿形链,所述外链板安装于内链板的外侧用以连接径向相邻的内链板,轴向两侧外链板之间设有多层内链板,多层所述内链板之间沿径向形成与链轮齿啮合的连续齿廓,沿轴向相邻的内链板之间设有密封链板或密封环,所述内链板和外链板之间设有密封环或密封链板,所述外链板、内链板、密封链板和/或密封环均是套设在销轴上在销轴外形成封闭结构；所述密封链板的齿廓朝向与内链板的齿廓朝向一致且重叠设置,所述密封链板的齿廓两侧凸出内链板的齿廓两侧设置。本发明阻断了润滑油脂的流失,大大提高使用寿命；并极大降低维护保养难度,在开放式场合具有优越使用性能；极大降低其噪音。(The sealing tooth-shaped chain comprises outer chain plates and inner chain plates, the outer chain plates and the inner chain plates are connected through pin shafts to form a tooth-shaped chain, the outer chain plates are arranged on the outer sides of the inner chain plates and used for being connected with the inner chain plates which are adjacent in the radial direction, multiple layers of inner chain plates are arranged between the outer chain plates on two axial sides, continuous tooth profiles meshed with the teeth of the chain wheel are formed between the multiple layers of inner chain plates in the radial direction, sealing chain plates or sealing rings are arranged between the inner chain plates which are adjacent in the axial direction, sealing rings or sealing chain plates are arranged between the inner chain plates and the outer chain plates, the inner chain plates, the sealing; the tooth profile direction of the sealing chain plate is consistent with that of the inner chain plate and is overlapped, and two sides of the tooth profile of the sealing chain plate are arranged to protrude out of two sides of the tooth profile of the inner chain plate. The invention blocks the loss of the lubricating grease and greatly prolongs the service life; the maintenance difficulty is greatly reduced, and the open type automobile seat has excellent service performance in an open type occasion; greatly reducing the noise thereof.)

1. Sealed profile of tooth chain, including outer link joint, inner link joint and round pin axle, outer link joint, inner link joint form the profile of tooth chain through round pin hub connection, the outer link joint is installed in the outside of inner link joint and is used for connecting radial adjacent inner link joint, is equipped with the multilayer inner link joint between the outer link joint of axial both sides, the multilayer along the continuous flank profile of formation and sprocket tooth meshing between the inner link joint, its characterized in that: sealing chain plates or sealing rings are arranged between the inner chain plates which are adjacent along the axial direction, sealing rings or sealing chain plates are arranged between the inner chain plates and the outer chain plates, the inner chain plates, the sealing chain plates and/or the sealing rings are sleeved on the pin shaft to form a closed structure outside the pin shaft;

the tooth profile direction of the sealing chain plate is consistent with that of the inner chain plate and is overlapped, and two sides of the tooth profile of the sealing chain plate are arranged to protrude out of two sides of the tooth profile of the inner chain plate.

2. The sealing tooth chain as claimed in claim 1, wherein: one surface of the inner chain plate is a plane, and the other surface of the inner chain plate is provided with a cylinder at the pin hole, or the two surfaces of the inner chain plate are both provided with cylinders at the pin hole, or the two surfaces of the inner chain plate are both planes.

3. The sealing tooth chain as claimed in claim 2, wherein: and a sealing chain plate is arranged between the inner chain plate with the barrel and the inner chain plate or the outer chain plate opposite to the barrel, and the aperture of the sealing chain plate is smaller than the outer diameter of the barrel and is tightly matched and assembled with the barrel.

4. The sealing tooth chain as claimed in claim 3, wherein: the inner diameter of the cylinder is consistent with the diameter of the pin hole of the inner chain plate, and the outer diameter of the cylinder is larger than the diameter of the pin hole of the inner chain plate and smaller than the width of the head of the inner chain plate; the preferred height of the protruding inner link plate of the cylinder is between 0.3 and 1.5 times the thickness of the inner link plate.

5. The sealing tooth chain as claimed in claim 2, wherein: and a sealing chain plate is arranged between the inner chain plate with the plane surface and the inner chain plate or the outer chain plate opposite to the plane surface, two surfaces of the sealing chain plate are provided with rubber coating structures at the pin hole or the periphery, and the inner diameter of an elastomer of the rubber coating structures on the surface of the sealing chain plate is larger than, equal to or smaller than the pin hole diameter of the inner chain plate.

6. The sealing cog chain according to any of claims 1 to 5, characterized in that: the preferred size of the protruding tooth profile portion of the link plate is 10% to 50% of the thickness of the inner link plate, the link plate is made of an elastomeric material, and the total thickness of the link plate is set on the basis of 10% to 30% of post-assembly elastomeric compression or extension.

7. The sealing cog chain according to any of claims 1 to 5, characterized in that: one or more concave ring or convex ring structures for reducing pressure and improving sealing performance are arranged on two surfaces and the hole wall of the sealing chain plate.

8. The sealing tooth chain as claimed in claim 2, wherein: a seal ring is disposed between the inner link plate having the planar surface and the inner link plate or the outer link plate opposed to the planar surface.

9. The sealing tooth chain as claimed in claim 8, wherein: the planar surface of the inner link plate is provided with a concave platform or a concave ring shape at the pin hole to accommodate the sealing ring to reduce the gap between the link plates.

10. The sealing tooth chain as claimed in claim 8, wherein: the cross section of the sealing ring is of a rectangular, arc or X-shaped sealing ring structure and is made of an elastomer material, the inner diameter of the sealing ring is smaller than the outer diameter of the pin shaft, and the outer diameter of the sealing ring is smaller than the diameter of the maximum circle formed by taking the pin hole of the inner chain plate as the center.

11. The sealing tooth chain as claimed in claim 1, wherein: the sealing ring and/or the sealing chain plate and the inner chain plate are/is of an integrated structure manufactured in an embedding, rubber coating or sticking mode.

12. The sealing tooth chain as claimed in claim 1, wherein: the diameter of a pin hole of the inner chain plate is larger than that of the pin shaft and is in clearance fit with the pin shaft; the inner chain plate is provided with two tooth profiles, an outer included angle formed between the outer side edges of the two tooth profiles is 60 degrees, an inner included angle formed between the inner side edges of the two tooth profiles is 50-65 degrees, the two inner side edges are arc lines, and the inner side edges and the outer side edges are meshed with the sprocket teeth simultaneously, or meshed with the sprocket teeth sequentially or meshed with the sprocket teeth alternately.

13. The sealing tooth chain as claimed in claim 1, wherein: the diameter of the pin hole of the outer chain plate is smaller than that of the pin shaft, and the outer chain plate is tightly matched and assembled with the pin shaft.

14. The sealing tooth chain as claimed in claim 1, wherein: the pin shaft is of a cylindrical structure with a smooth outer surface or a cylindrical structure with a spiral oil storage groove on the circumferential surface, the axial slotting length of the spiral oil storage groove is the total length of the pin shaft penetrating all the inner chain plate apertures, the width of the spiral oil storage groove is preferably 10-30% of the diameter of the pin shaft, and the groove depth of the spiral oil storage groove is preferably 80% of the maximum allowable abrasion depth of the pin shaft.

Technical Field

The invention belongs to the technical field of transmission chains, and particularly relates to a sealing tooth-shaped chain.

Background

The existing round pin type tooth-shaped chains are very various in types, and are divided from meshing contact positions of chain teeth and chain wheel teeth, and can be divided into three types, namely an inner meshing tooth-shaped chain, an outer meshing tooth-shaped chain and a composite meshing tooth-shaped chain; however, whatever the toothed chain described above, it has significant drawbacks: firstly, the chain has large mass, and the area of a friction pair can be increased only by increasing the number of chain sheets in order to achieve the necessary strength and abrasion resistance, so that the mass of the chain is obviously larger than that of a roller chain under the same transmission power; secondly, the chain sheet is used as a friction pair, the aperture is small in contact area between the punched hole wall and the chain pin, and the chain sheet is easy to have microcracks and easy to wear and even break under the impact environment; thirdly, the heat dissipation, weather resistance and lubrication maintenance performance are poor, and the relatively low noise performance can be exerted only in a closed clean and oil bath environment; fourthly, the diameter of the pin shaft is limited by the pitch of the chain, the effective tensile section of the chain plate is reduced when the diameter of the pin shaft is enlarged, the tensile force of the chain plate can not be matched, the pressing surface of a pin bearing is reduced when the outer diameter of the pin shaft is reduced, and the tensile strength and the wear resistance of the pin shaft are not matched with those of the chain plate; this limits the range of applications of the toothed chain. In order to solve the above problems, patent CN209524043U proposes a new scheme, and discloses a wear-resistant and impact-resistant toothed chain, which is shown in fig. 1, and comprises an inner chain plate 1 ', an outer chain plate 2 ', and a pin shaft 3 ', wherein the inner chain plate 1 ' and the outer chain plate 2 ' are both matched with the pin shaft 3 ' through their own pin holes, and further comprises a cylinder body 4 ', the cylinder body 4 ' is arranged on the inner chain plate 1 ', and one end of the pin shaft 3 ' is located in the cylinder body 4 '. The utility model discloses a set up barrel 4 'on interior link joint 1', and barrel 4 'with round pin axle 3' contact, for only interior link joint and outer link joint and round pin axle cooperation originally, barrel 4 'can increase area of contact, reduce frictional force and impact force on the unit area, so improved the impact resistance and the wear resistance of whole device, nevertheless still exist at open service environment's lubricated maintenance difficulty, the problem of life weak point partially.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides the sealing tooth-shaped chain which blocks the loss of lubricating grease, greatly prolongs the service life, greatly reduces the maintenance difficulty, has excellent service performance in an open type occasion and greatly reduces the noise.

The technical scheme adopted by the invention is as follows:

sealed profile of tooth chain, including outer link joint, inner link joint and round pin axle, outer link joint, inner link joint form the profile of tooth chain through round pin hub connection, the outer link joint is installed in the outside of inner link joint and is used for connecting radial adjacent inner link joint, is equipped with the multilayer inner link joint between the outer link joint of axial both sides, the multilayer along the continuous flank profile of formation and sprocket tooth meshing between the inner link joint, its characterized in that: sealing chain plates or sealing rings are arranged between the inner chain plates which are adjacent along the axial direction, sealing rings or sealing chain plates are arranged between the inner chain plates and the outer chain plates, the inner chain plates, the sealing chain plates and/or the sealing rings are sleeved on the pin shaft to form a closed structure outside the pin shaft;

the tooth profile direction of the sealing chain plate is consistent with that of the inner chain plate and is overlapped, and two sides of the tooth profile of the sealing chain plate are arranged to protrude out of two sides of the tooth profile of the inner chain plate. According to the invention, the sealing chain plates and the sealing rings are arranged between the chain plates, so that the friction pair of the toothed chain is in a sealing state, the loss of lubricating grease is blocked, and the service life is greatly prolonged; the maintenance difficulty is greatly reduced, and the open type automobile seat has excellent service performance in an open type occasion; because the two sides of the tooth profile of the sealing chain plate protrude the two sides of the tooth profile of the inner chain plate, the tooth-shaped chain and the chain wheel are firstly buffered when being meshed, and the noise is greatly reduced.

Furthermore, one surface of the inner chain plate is a plane, and the other surface of the inner chain plate is provided with a cylinder at the pin hole, or the two surfaces of the inner chain plate are both provided with cylinders at the pin hole, or the two surfaces of the inner chain plate are both planes.

Furthermore, a sealing chain plate is arranged between the inner chain plate with the barrel and the inner chain plate or the outer chain plate opposite to the barrel, the aperture of the sealing chain plate is smaller than the outer diameter of the barrel, and the sealing chain plate is tightly assembled with the barrel in a matching way.

Furthermore, the inner diameter of the cylinder body is consistent with the diameter of the pin hole of the inner chain plate, and the outer diameter of the cylinder body is larger than the diameter of the pin hole of the inner chain plate and smaller than the width of the head of the inner chain plate; the preferred height of the protruding inner link plate of the cylinder is between 0.3 and 1.5 times the thickness of the inner link plate.

Or a sealing chain plate is arranged between the inner chain plate with the plane surface and the inner chain plate or the outer chain plate opposite to the plane surface, the two surfaces of the sealing chain plate are provided with rubber coating structures at the pin hole or the periphery, and the inner diameter of the elastomer of the rubber coating structures on the surface of the sealing chain plate can be larger than, equal to or smaller than the pin hole diameter of the inner chain plate.

Further, the preferred size of the tooth profile convex portion of the seal link plate is 10% to 50% of the thickness of the inner link plate, the seal link plate is made of an elastomer material, and the total thickness of the seal link plate is set on the basis of 10% to 30% of compression or extension after assembly of the elastomer.

Furthermore, one or more concave ring or convex ring structures are arranged on the two surfaces and the hole wall of the sealing chain plate, so that the sealing effect is improved, the pressure is reduced, and the rotation resistance of the chain link is reduced.

Alternatively, a seal ring is disposed between the inner link plate having the planar surface and the inner link plate or the outer link plate opposed to the planar surface.

Further, the planar surface of the inner link plate is provided with a concave platform or a concave ring shape at the pin hole to accommodate the sealing ring and reduce the gap between the link plates, thereby protecting the sealing ring from being damaged due to over compression.

Further, the cross section of the sealing ring is of a rectangular, arc or X-shaped sealing ring structure and is made of an elastomer material, the inner diameter of the sealing ring is smaller than the outer diameter of the pin shaft, and the outer diameter of the sealing ring is smaller than the diameter of the maximum circle formed by taking the pin hole of the inner chain plate as the center (namely, the sealing ring does not extend out of the chain plate after assembly).

Furthermore, the sealing ring and/or the sealing chain plate and the inner chain plate are/is of an integrated structure manufactured in an embedding, rubber coating or sticking mode.

Furthermore, the diameter of a pin hole of the inner chain plate is larger than that of the pin shaft and is in clearance fit with the pin shaft; the inner chain plate is provided with two tooth profiles, an outer included angle formed between the outer side edges of the two tooth profiles is 60 degrees, an inner included angle formed between the inner side edges of the two tooth profiles is 50-65 degrees, the two inner side edges are arc lines, and the inner side edges and the outer side edges are meshed with the sprocket teeth simultaneously, or meshed with the sprocket teeth sequentially or meshed with the sprocket teeth alternately.

Furthermore, the diameter of the pin hole of the outer chain plate is smaller than that of the pin shaft, and the outer chain plate is assembled with the pin shaft in a tight fit mode.

Furthermore, the pin shaft is of a cylindrical structure with a smooth outer surface or a cylindrical structure with a spiral oil storage groove on the circumferential surface, the axial grooving length of the spiral oil storage groove is the total length of the pin shaft penetrating through all the inner chain plate apertures, the width of the spiral oil storage groove is 10-30% of the diameter of the preferred pin shaft, and the groove depth of the spiral oil storage groove is preferably 80% of the maximum allowable wear depth of the pin shaft.

The invention has the beneficial effects that:

1. the inner chain plate with the cylinder takes the bore diameter of the cylinder formed by drawing or cold extrusion processing as a friction pair, so that the strength and the impact resistance are obviously improved while the friction area is improved, and the diameter of a pin shaft is also increased while the strength of the chain plate is ensured to be improved.

2. The sealing chain plates and the sealing rings are arranged between the chain plates, so that the friction pair of the toothed chain is in a sealing state, the loss of lubricating grease is blocked, and the service life is greatly prolonged; greatly reduces the maintenance difficulty and has excellent service performance in an open type occasion.

3. Because the two sides of the tooth profile of the sealing chain plate protrude the two sides of the tooth profile of the inner chain plate, the tooth-shaped chain and the chain wheel are firstly buffered when being meshed, and the noise is greatly reduced.

Drawings

Fig. 1 is a schematic structural view of a conventional toothed chain.

Fig. 2 is a schematic top view of the present invention.

Fig. 3 is a front view of a first assembly mode of the present invention.

Fig. 4 is a front view of a second assembly of the present invention.

Fig. 5 is a front view schematically illustrating a third assembly method of the present invention.

Fig. 6 is a front view schematically illustrating a fourth assembly method of the present invention.

Fig. 7 is a front view schematically illustrating a fifth assembly method of the present invention.

Fig. 8 is a bottom view structural schematic diagram and a front view structural schematic diagram of the outer link plate of the invention.

Fig. 9 is a bottom view, a front view, and a cross-sectional view of the first structure of the inner link plate of the present invention.

Fig. 10 is a bottom view, a front view, and a cross-sectional view of a second structure of the inner link plate of the present invention.

Fig. 11 is a bottom view, a front view, and a cross-sectional view of a third structure of the inner link plate of the present invention.

Fig. 12 is a bottom view, a front view, and a cross-sectional view of a fourth structure of the inner link plate of the present invention.

Fig. 13 is a bottom view, a front view, and a cross-sectional view of a fifth construction of an inner link plate according to the present invention.

Fig. 14 is a bottom view, a front view, and a cross-sectional view of a sixth structure of the inner link plate of the present invention.

Fig. 15 is a schematic bottom view of a structure of a sealing link plate of the present invention and a schematic front view of a structure of a straight edge and a circular arc edge with different thicknesses.

Fig. 16 is a schematic bottom view and a schematic front view of the end face or periphery encapsulated sealing link plate of the present invention.

Fig. 17 is a schematic bottom view and a schematic front view of the end face or the hollow of the sealing link plate provided with the concave-convex groove.

Fig. 18 is a bottom view and a front view of the sealing ring of the present invention.

Fig. 19 is a schematic diagram of pin structures of two different structures according to the present invention.

Detailed Description

The present invention is further illustrated by the following examples, which are not intended to limit the invention to these embodiments. It will be appreciated by those skilled in the art that the present invention encompasses all alternatives, modifications and equivalents as may be included within the scope of the claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example one

Referring to fig. 2 and 3, the embodiment provides a sealed toothed chain, which includes outer chain plates 1, inner chain plates 2 and a pin shaft 3, where the outer chain plates 1 and the inner chain plates 2 are connected by the pin shaft 3 to form a toothed chain, the outer chain plates 1 are installed on the outer sides of the inner chain plates 2 to connect the radially adjacent inner chain plates 2, multiple layers of inner chain plates 2 are installed between the outer chain plates 1 on both axial sides, a continuous tooth profile meshed with a sprocket tooth is formed between the multiple layers of inner chain plates 2 along the radial direction, a seal chain plate 3 or a seal ring 5 is installed between the axially adjacent inner chain plates 2, a seal ring 5 or a seal chain plate 3 is installed between the inner chain plate 2 and the outer chain plate 1, and the outer chain plates 1, the inner chain plates 2, the seal chain plates 4 and/or the seal rings 5 are all sleeved on;

the tooth profile orientation of the sealing chain plate 4 is consistent with that of the inner chain plate 2 and is overlapped, and two sides of the tooth profile of the sealing chain plate 4 protrude out of two sides of the tooth profile of the inner chain plate 2. According to the invention, the sealing chain plates 4 and the sealing rings 5 are arranged between the chain plates, so that the friction pair of the toothed chain is in a sealing state, the loss of lubricating grease is blocked, and the service life is greatly prolonged; the maintenance difficulty is greatly reduced, and the open type automobile seat has excellent service performance in an open type occasion; because the two sides of the tooth profile of the sealing chain plate 4 protrude the two sides of the tooth profile of the inner chain plate 2, the tooth-shaped chain is firstly buffered when being meshed with the chain wheel, and the noise is greatly reduced.

Specifically, referring to fig. 8, the diameter of the pin hole of the outer link plate 1 is smaller than the diameter of the pin shaft, and the outer link plate 1 is tightly assembled with the pin shaft 3. The outer chain plate 1 plays a role in limiting the position movement when the gear is meshed with the inner chain plate 2, so that the chain dropping is prevented, and the outer chain plate 1 does not participate in the transmission meshing work; but acts to compress the packing link plates 4 or the packing rings 5.

Referring to fig. 9, the diameter of the pin hole of the inner link plate 2 is larger than that of the pin shaft 3, and the pin hole is in clearance fit with the pin shaft 3; the inner chain plate 2 is provided with two tooth profiles, the outer included angle formed between the outer side edges of the two tooth profiles is 60 degrees, the outer side edges can be straight side edges or arc side edges, the inner included angle formed between the inner side edges of the two tooth profiles is 50-65 degrees, and the two inner side edges are arc lines, and the inner side edges and the outer side edges can be meshed with matched gears independently or together, can be meshed with the matched gears simultaneously or sequentially or alternately.

In the embodiment, one surface of the inner link plate 2 is a plane, and the other surface is provided with a cylinder 21 at the pin hole. 4 layers of inner chain plates 2 are arranged between the outer chain plates 1 on the two sides, the cylinder bodies 21 of the first layer of inner chain plates and the fourth layer of inner chain plates are arranged towards the corresponding outer chain plates 1, the cylinder bodies 21 of the second layer of inner chain plates and the third layer of inner chain plates are arranged oppositely, and the planes of the first layer of inner chain plates and the second layer of inner chain plates and the planes of the third layer of inner chain plates and the fourth layer of inner chain plates are arranged oppositely. The inner diameter of the cylinder body 21 is consistent with the diameter of the pin hole of the inner chain plate 2, and the outer diameter of the cylinder body is larger than the diameter of the pin hole of the inner chain plate 2 and smaller than the width of the head of the inner chain plate 2; the height of the protruding inner chain plate 2 of the cylinder 21 is between 0.3 and 1.5 times the thickness of the inner chain plate 2.

In the embodiment, the sealing chain plates 4 are arranged between the first layer of inner chain plates and the corresponding outer chain plates 1 and between the fourth layer of inner chain plates and the corresponding outer chain plates 1, the sealing chain plates 4 are arranged between the second layer of inner chain plates and the third layer of inner chain plates, the outer contours of the sealing chain plates 4 are similar to those of the inner chain plates 2, the holes of the sealing chain plates 4 are sleeved on the barrel body 21 to achieve a sealing effect, and the hole diameters of the sealing chain plates 4 are smaller than the outer diameter of the barrel body 21 and are tightly assembled with the barrel body 21.

The external dimension of the sealing chain plate 4 of the embodiment can be larger than, equal to or smaller than the external dimension of the inner chain plate 2 on the premise of not interfering in rotation; the width of the tooth part of the sealing chain plate 4 protrudes out of the tooth part of the inner chain plate, namely, two sides of the tooth profile of the sealing chain plate 4 protrude out of two sides of the tooth profile of the inner chain plate 2, and the protruding height is preferably 10-50% of the thickness of the inner chain plate; the outer profile of the sealing link plate 4 may be a straight edge, a circular arc edge or a concave surface with other shapes for storing lubricating grease, see fig. 15. The sealing chain plate 4 is made of an elastomer material, preferably, the Shore hardness of the sealing chain plate is 80-90A, and the sealing chain plate can be made of a foaming material and other synthetic rubber and plastic materials; the total thickness of the sealing chain plate 4 is set on the basis of 10 to 30 percent of compression or stretching after the assembly of the elastomer, namely the total thickness is equal to 1.1 to 1.3 times of the length of the cylinder body 21 when the sealing chain plate is tightly pressed with the single inner chain plate 2; when the two cylinders 21 are pressed, the length of the two cylinders 21 is 1.1 to 1.3 times of the sum of the lengths of the 2 cylinders 21.

Of course, referring to fig. 17, the two surfaces and the hole wall of the sealing link plate 4 according to this embodiment may be provided with one or more concave rings or convex rings to reduce the pressure, so as to improve the sealing effect and reduce the pressure, thereby reducing the rotational resistance of the link.

In the embodiment, the sealing rings 5 are arranged between the first layer inner chain plate and the second layer inner chain plate and between the third layer inner chain plate and the fourth layer inner chain plate, and the sealing rings 5 are sleeved on the pin shaft 3 to play a role in sealing. The section of the sealing ring 5 can be a common sealing ring structure such as a rectangle, an arc, an X shape and the like, referring to fig. 18, the material is made of an elastomer material, can be a foam material and other synthetic rubber and plastic materials, and preferably has a Shore hardness of 80-90A; the inner diameter of the sealing ring 5 is smaller than the outer diameter of the pin shaft, and the outer diameter of the sealing ring is smaller than the maximum circle formed by taking the pin hole of the inner chain plate 2 as the center, namely the sealing ring 5 does not extend out of the tooth profile of the inner chain plate 2 after being sleeved and compressed. Referring to fig. 8, the flat surface of the inner link plate 2 of the present embodiment may be provided with a recessed land or ring 22 at the pin aperture to accommodate the sealing ring to reduce the gap between the link plates and protect the sealing ring from damage due to over-compression.

The thickness of the inner chain plate 2 in the embodiment can be different according to the requirements of the total strength and the wear resistance balance of the chain; similarly, the heights of the cylindrical bodies 21 of the inner link plates 2 may be assembled differently. The inner chain plates 2 are preferably combined in an even number during assembly, and the orientation of the cylinder 21 of the inner chain plates 2 can be freely adjusted according to requirements.

Referring to fig. 19, the pin 3 of the present embodiment may have a cylindrical structure with a smooth outer surface; in order to prolong the service life, the pin shaft 3 can also be a cylindrical structure with a spiral oil storage groove 31 on the circumferential surface, the axial slotting length of the spiral oil storage groove 31 is the total length of the pin shaft penetrating all the inner chain plate apertures, the width of the spiral oil storage groove 31 is preferably 10-30% of the pin shaft diameter, and the groove depth of the spiral oil storage groove 31 is preferably 80% of the maximum allowable pin shaft wear depth.

When the chain works, the sprocket teeth firstly contact the position of the sealing chain plate 4 protruding out of the tooth profile of the inner chain plate when being meshed with the teeth of the inner chain plate 2, and then contact the tooth profile of the inner chain plate 2 after being buffered, so that the impact force is reduced. The inner hole friction surface of the inner chain plate 2 is changed into a structure closed by the sealing chain plate 4 and the sealing ring 5 from an original open type oil leakage-prone structure, lubricating grease is locked in the inner hole to maintain lubrication of a friction pair for a long time, the service life can be prolonged by more than one time, and the impact strength of chain teeth and a chain wheel is obviously reduced; greatly reduces the noise during transmission.

Example two

Referring to fig. 4, the present embodiment is different from the first embodiment in that: the orientations of the cylindrical bodies 21 of the inner link plates 2 are different. Specifically, the cylinder 21 of the first layer inner chain plate is arranged towards the plane of the second layer inner chain plate, the second layer inner chain plate is arranged opposite to the cylinder 21 of the third layer inner chain plate, the cylinder 21 of the fourth layer inner chain plate is arranged towards the plane of the third layer inner chain plate, and the planes of the first layer inner chain plate and the fourth layer inner chain plate are arranged opposite to the corresponding outer chain plate 1.

Sealing chain plates 4 are arranged between the first layer of inner chain plates and the second layer of inner chain plates, between the second layer of inner chain plates and the third layer of inner chain plates and between the fourth layer of inner chain plates and the third layer of inner chain plates; and sealing rings 5 are arranged between the first layer inner chain plate and the fourth layer inner chain plate and the corresponding outer chain plate.

The rest of the structure and the function are the same as those of the first embodiment.

EXAMPLE III

Referring to fig. 5 and fig. 11, the present embodiment is different from the first embodiment in that: both surfaces of the inner link plate 2 of the present embodiment are provided with the cylinder 21 at the pin hole. Specifically, sealing chain plates 4 are arranged between the first layer of inner chain plates and the second layer of inner chain plates, between the second layer of inner chain plates and the third layer of inner chain plates, and between the fourth layer of inner chain plates and the third layer of inner chain plates; and sealing chain plates 4 are arranged between the first layer inner chain plate and the fourth layer inner chain plate and the corresponding outer chain plates.

The cylinder 21 of the inner chain plate 2 can be symmetrically distributed on two sides, and the direction does not need to be selected during assembly; when the inner chain plates 2 of the two-sided cylinder body 21 are selected, the sealing rings 5 are not used for sealing, and only the sealing chain plates 4 with different thicknesses are used.

The rest of the structure and the function are the same as those of the first embodiment.

Example four

Referring to fig. 12, the present embodiment is different from the first embodiment in that: both surfaces of the inner link plate 2 of the present embodiment are flat.

The requirement on the service life is not high, and the common flat-plate-shaped inner chain plate can be selected under the working condition that the total width of the chain is limited, and the sealing chain plate 4 can be manufactured by adopting a flat-plate-shaped metal piece double-surface rubber coating or peripheral rubber coating mode; and the sealing ring 5 or the sealing chain plate 4 is selected to seal (or the sealing ring and the sealing chain plate are mixed to seal) according to the number of the inner chain plates 2 and the arrangement mode.

Referring to fig. 6, in the embodiment, sealing rings 5 are respectively installed between the first layer inner chain plate and the second layer inner chain plate, between the second layer inner chain plate and the third layer inner chain plate, and between the fourth layer inner chain plate and the third layer inner chain plate; and sealing rings 5 are arranged between the first layer inner chain plate and the fourth layer inner chain plate and the corresponding outer chain plate. Only the sealing ring 5 is used for sealing.

Of course, referring to fig. 7 and 14, in this embodiment, only one layer of the inner link plate 2 may be provided, the sealing link plate 4 is installed between the inner link plate 2 and the outer link plate 1, both sides of the sealing link plate 4 are provided with the encapsulating structure at or around the pin hole, and the inner diameter of the elastomer of the encapsulating structure on the surface of the sealing link plate 4 may be greater than, equal to or smaller than the pin hole diameter of the inner link plate 2. Only the sealing link plates 4 are used for sealing.

The rest of the structure and the function are the same as those of the first embodiment.

EXAMPLE five

The difference between the present embodiment and the first embodiment is: in this embodiment, the sealing ring 5 and/or the sealing link plate 4 and the inner link plate 2 may be integrally formed by embedding, encapsulating, or adhering. The compression or extension ratio of the sealing chain plate 4 and the sealing ring 5 after assembly is preferably 10-30% of the thickness of the sealing chain plate. The plane of the sealing chain plate 4 can be provided with a groove or a convex ring to reduce the pressure and improve the sealing effect.

Referring to fig. 13, the inner link plate 2 of the present embodiment may be provided with a seal link plate 4 on one surface and a seal ring 5 on the other surface.

Referring to fig. 14, the inner link plate 2 of the present embodiment may also be provided with the sealing link plate 4 on both surfaces.

Of course, both surfaces of the inner link plate 2 may be provided with the seal rings 5. The rest of the structure and the function are the same as those of the first embodiment.