transmission

Abstract

A transmission device includes an oil-sealed chain and a sprocket for engaging the oil-sealed chain. The oil-sealed chain includes a plurality of pivot units, a plurality of inner chain units, a plurality of outer chain units, a plurality of oil-sealed rings, and a plurality of engaging spaces. The oil-sealed rings are respectively sleeved on the pivot units and sandwiched between the inner chain units and the outer chain units. An outer periphery of each of the oil-sealed rings protrudes beyond an outer periphery of the adjacent inner chain unit. The sprocket includes a wheel body, engaging portions radially protruding outward from a periphery of the wheel body and used for engaging the engaging spaces, and two boss portions respectively protruding outward from two opposite sides of the wheel body. The boss portions can be used for abutting against the oil-sealed rings of the oil-sealed chain, thereby reducing wear, vibration, and noise during transmission.

Description

Technical Field

[0001] This utility model relates to a power transmission mechanism, and more particularly to a transmission device for a chain and sprocket. Background Technology

[0002] Existing chains and sprockets achieve transmission by having the sprocket's teeth directly mesh with the chain. However, this direct metal-to-metal meshing method generates considerable impact force during transmission. This not only easily causes wear and tear on the chain and sprocket but also produces vibrations and collision noises. This not only affects the stability and lifespan of the equipment but also generates significant noise. Utility Model Content

[0003] The purpose of this invention is to provide a transmission device that can overcome at least one of the shortcomings of the prior art.

[0004] The transmission device of this utility model includes an oil seal chain and a sprocket for engaging and driving the oil seal chain.

[0005] The oil seal chain includes several pivot units arranged at intervals along the transmission direction, several inner chain units arranged at intervals along the transmission direction, several outer chain units arranged outwards of the inner chain units in a staggered manner along the transmission direction, several oil seal rings respectively sleeved on the pivot units, and several meshing spaces defined by the cooperation between the pivot units and the inner chain units.

[0006] Each of the pivot units includes a chain pin extending in a tandem direction orthogonal to the drive direction. Each of the inner chain units is fitted onto two adjacent pivot units. Each of the outer chain units is fitted onto the chain pin of two adjacent pivot units. Oil seals are respectively sandwiched between the inner and outer chain units. The outer periphery of each oil seal protrudes beyond the outer periphery of the adjacent inner chain unit.

[0007] The sprocket includes a wheel body rotatable about a rotation axis, a meshing portion protruding radially outward from the periphery of the wheel body, and two bosses protruding outward from opposite sides of the wheel body and surrounding the rotation axis. The meshing portion engages with the meshing space of the oil seal chain. The bosses serve as abutments for the oil seal ring of the oil seal chain.

[0008] In the transmission device of this utility model, the boss portion is arranged in a ring around the rotation axis.

[0009] The transmission device of this utility model further includes two annular grooves in the sprocket. Each annular groove is formed between the corresponding boss and the meshing part and is recessed from the periphery of the wheel body toward the rotation axis.

[0010] The transmission device of this utility model includes a plurality of meshing teeth that extend radially outward from the periphery of the sprocket body at equal angular intervals in the meshing part, the meshing teeth being used to mesh the meshing space.

[0011] The transmission device of this utility model includes a bushing that is rotatably fitted over the chain pin and a roller that is rotatably fitted over the bushing. Each inner chain unit includes two inner chain pieces fitted over the bushings of two adjacent pivot units and located on both sides of the roller. The roller and the inner chain pieces cooperate to define the meshing space. The roller is used for meshing transmission by the meshing teeth of the sprocket. The oil seal rings are respectively fitted over the two opposite ends of the bushing.

[0012] The transmission device of this utility model has each oil seal ring of the oil seal chain having a ring body surrounding a central axis, the central axis extending along the serial connection direction, and each ring body having two opposite surfaces spaced apart along the central axis having oil grooves surrounding the central axis.

[0013] The transmission device of this utility model has an oil seal ring of the oil seal chain having a ring body surrounding a central axis, the central axis extending along the serial connection direction, and each ring body having two oil grooves on two opposite sides arranged at intervals along the central axis, respectively, surrounding the central axis and concentrically surrounding it.

[0014] The beneficial effects of this utility model are as follows: the elasticity of the oil seal ring of the oil seal chain abuts against the boss of the sprocket, which has a buffering effect during transmission, thereby reducing wear, vibration and noise. Attached Figure Description

[0015] Other features and beneficial effects of this utility model will be clearly presented in the embodiments with reference to the accompanying drawings, wherein:

[0016] Figure 1 This is an incomplete exploded perspective view illustrating a first embodiment of the transmission device of this utility model;

[0017] Figure 2 This is an incomplete front view illustrating the structure of the first embodiment;

[0018] Figure 3 It is along Figure 2 The incomplete side sectional view taken by line II in the figure illustrates the structure of the first embodiment;

[0019] Figure 4 This is an incomplete top sectional view illustrating the structure of an oil seal chain in the first embodiment;

[0020] Figure 5 A partial sectional perspective view illustrating the structure of an oil seal ring in the first embodiment; and

[0021] Figure 6 This is a partial sectional perspective view illustrating the structure of the oil seal ring according to a second embodiment of the transmission device of this utility model. Detailed Implementation

[0022] Before this utility model is described in detail, it should be noted that similar elements are represented by the same reference numerals in the following description.

[0023] See Figure 1 and Figure 2 A first embodiment of the transmission device of this utility model includes an oil seal chain 1 and a sprocket 2 for engaging and driving the oil seal chain 1.

[0024] See Figure 1 , Figure 3 and Figure 4 The oil seal chain 1 includes several pivot units 11 spaced apart along a transmission direction D1, several inner chain units 12 spaced apart along the transmission direction D1, several outer chain units 13 staggered along the transmission direction D1 outside the inner chain units 12, several oil seal rings 14 respectively sleeved on the pivot units 11, and several meshing spaces 15 defined by the cooperation of the pivot units 11 and the inner chain units 12.

[0025] Each of the pivot units 11 includes a chain pin 111 extending along a tandem direction D2 orthogonal to the transmission direction D1, a bushing 112 rotatably fitted over the chain pin 111, and a roller 113 rotatably fitted over the bushing 112. Each of the inner chain units 12 includes two inner chain links 121 fitted over the bushings 112 of two adjacent pivot units 11 and located on both sides of the roller 113. Each of the outer chain units 13 includes two outer chain links 131 fitted over the chain pins 111 of two adjacent pivot units 11. The outer chain links 131 are staggered along the transmission direction D1 and arranged outside the inner chain links 121.

[0026] See Figures 3 to 5The oil seal rings 14 are respectively fitted onto the two opposite ends of the bushing 112 and sandwiched between the inner chain unit 12 and the outer chain unit 13. Each oil seal ring 14 has a ring body 142 surrounding a central axis 141. The central axis 141 extends along the serial connection direction D2. The outer periphery of each ring body 142 protrudes beyond the outer periphery of the adjacent inner chain piece 121. Each ring body 142 has an oil groove 143 surrounding the central axis 141 on two opposite surfaces spaced apart along the central axis 141. The ring body 142 is made of an elastic material such as, but not limited to, rubber or silicone, which can be used to seal oily liquids.

[0027] Since lubricating oil is added between the chain pin 111 and the bushing 112, the oil seal ring 14 prevents lubricating oil from leaking out. The presence of each oil groove 143 can also increase the space for storing lubricating oil, making it less likely for lubricating oil to leak out, thereby extending the service life of the relevant parts.

[0028] The meshing space 15 is defined by the interaction of the roller 113 and the inner chain piece 121.

[0029] Each of the aforementioned chain pins 111, bushings 112, rollers 113, inner chain links 121, and outer chain links 131 has a variety of designs and is not the focus of this utility model's improvement. They can all be used for meshing and transmission with the sprocket 2, and their shapes and appearances are not limited to the styles shown in the accompanying drawings. The number or appearance of the inner chain links 121 in each inner chain unit 12 can also be varied according to actual needs, and is not limited to two links; other numbers or appearances suitable for meshing and transmission with the sprocket 2 can also be used.

[0030] See Figures 1 to 3 The sprocket 2 includes a wheel body 21 that can rotate around a rotation axis 211, a meshing part 22 that protrudes radially outward from the periphery of the wheel body 21, two bosses 23 that protrude outward from two opposite sides of the wheel body 21 and surround the rotation axis 211, and two annular grooves 24 that are recessed from the periphery of the wheel body 21 toward the rotation axis 211.

[0031] The meshing portion 22 includes several meshing teeth 221 that extend radially outward from the periphery of the wheel body 21 at equal angular intervals, and several tooth grooves 222 located between the meshing teeth 221. The meshing teeth 221 are used to engage the meshing space 15 of the oil seal chain 1. Each tooth groove 222 has a groove bottom 223 that is closest to the rotation axis 211. When each meshing tooth 221 engages with the oil seal chain 1, it inserts into the corresponding meshing space 15 to drive the oil seal chain 1.

[0032] In other embodiments of this utility model, the pivot unit 11 of the oil seal chain 1 may also exclude the roller 113.

[0033] The boss portion 23 can be used for the oil seal ring 14 of the oil seal chain 1 to abut against. The boss portion 23 is annular around the rotation axis 211. In other embodiments of this utility model, the boss portion 23 may also be disc-shaped, non-continuous circular wavy, or have the corresponding tooth groove 222 position.

[0034] Each of the aforementioned annular groove portions 24 is formed between the corresponding boss portion 23 and the engaging portion 22, serving to prevent the sprocket 2 from colliding with the inner chain link 121 when the boss portion 23 abuts against the oil seal ring 14. In other embodiments of this utility model, the sprocket 2 may not include the annular groove portions 24, as long as it does not affect the transmission; that is, the engaging portion 22 and its respective boss portion 23 may not have a portion recessed towards the rotation axis 211.

[0035] In this embodiment, during transmission, the meshing portion 22 of the sprocket 2 first inserts into the meshing space 15 of the oil seal chain 1. During this meshing process, the roller 113 first rolls or slides into the tooth groove 222. Before the roller 113 impacts the groove bottom 223, the oil seal ring 14 is first pressed or abuts against the boss portion 23. Then, the roller 113 impacts and meshes with the groove bottom 223. Because the outer periphery of the ring body 142 of the oil seal ring 14 protrudes beyond the outer periphery of the adjacent inner chain piece 121, the oil seal ring 14 can better contact the boss portion 23.

[0036] Therefore, through the structural design of the boss portion 23 and the oil seal ring 14, not only can the meshing area between the sprocket 2 and the oil seal chain 1 be increased, providing support and increasing the stability of meshing, but also the elasticity of the oil seal ring 14 can be combined to achieve the functions of buffering and noise reduction, making the transmission process smoother and more stable.

[0037] See Figure 6 A second embodiment of the transmission device of this utility model has a generally similar overall structure to the first embodiment, the difference being the structural design of each of the oil seal rings 14 of the oil seal chain 1. In this second embodiment, each of the oil seal rings 14 has two oil grooves 143 that surround the central axis 141 and are concentrically arranged on two opposite sides of the ring body 142 along the central axis 141.

[0038] In summary, the transmission device of this utility model, through the elasticity of the oil seal ring 14 of the oil seal chain 1 against the boss portion 23 of the sprocket 2, can have a buffering effect during transmission, thereby reducing wear, vibration and noise. Therefore, it can indeed achieve the purpose of this utility model.

[0039] The above description is merely an embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Any simple equivalent changes and modifications made in accordance with the claims and description of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A transmission device, characterized in that: Includes: an oil-sealed chain comprising several pivot units spaced apart along the transmission direction, several inner chain units spaced apart along the transmission direction, several outer chain units staggered along the transmission direction outside the inner chain units, several oil seal rings respectively fitted onto the pivot units, and several meshing spaces defined by the pivot units and the inner chain units. Each pivot unit includes a chain pin extending along a serial connection direction orthogonal to the transmission direction. Each inner chain unit is fitted onto two adjacent pivot units, and each outer chain unit is fitted onto two adjacent pivot units. In addition to the chain pin of the unit, the oil seal rings are respectively sandwiched between the inner chain unit and the outer chain unit, and the outer periphery of each oil seal ring protrudes beyond the outer periphery of the adjacent inner chain unit; and a sprocket for engaging and driving the oil seal chain, and including a wheel body that can rotate about a rotation axis, a meshing portion that protrudes radially outward from the periphery of the wheel body, and two boss portions that protrude outward from two opposite sides of the wheel body and surround the rotation axis, the meshing portion for engaging the meshing space of the oil seal chain, and the boss portions for the oil seal rings of the oil seal chain to abut against.

2. The transmission device according to claim 1, characterized in that: The boss portion is arranged in a ring around the axis of rotation.

3. The transmission device according to claim 1, characterized in that: The sprocket also includes two annular grooves, each of which is formed between the corresponding boss and the meshing part and is recessed from the periphery of the sprocket body toward the axis of rotation.

4. The transmission device according to claim 1, characterized in that: The meshing portion of the sprocket includes several meshing teeth that extend radially outward from the periphery of the sprocket body at equal angular intervals, and the meshing teeth are used to engage the meshing space.

5. The transmission device according to claim 4, characterized in that: Each pivot unit of the oil seal chain further includes a bushing that is rotatably fitted over the chain pin, and a roller that is rotatably fitted over the bushing. Each inner chain unit includes two inner chain plates fitted over the bushings of two adjacent pivot units and located on both sides of the roller. The roller and the inner chain plates cooperate to define the meshing space. The roller is driven by the meshing teeth of the sprocket. The oil seal rings are respectively fitted over the two opposite ends of the bushing.

6. The transmission device according to claim 1, characterized in that: Each of the oil seal rings in the oil seal chain has a ring body surrounding a central axis that extends along the serial connection direction, and each ring body has two opposite sides spaced apart along the central axis, each having an oil groove surrounding the central axis.

7. The transmission device according to claim 1, characterized in that: Each of the oil seal rings of the oil seal chain has a ring body surrounding a central axis that extends along the serial connection direction, and each ring body has two oil grooves on two opposite sides spaced apart along the central axis, which are concentrically arranged around the central axis.

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