High-speed silent chain transmission system for electric vehicle

Abstract

A high-speed silent chain transmission system for an electric vehicle, relating to the field of chain transmission. The high-speed silent chain transmission system comprises a chain (1) and a sprocket wheel (2); the chain (1) comprises inner chain links (11); every two adjacent inner chain links (11) are connected by means of an outer chain plate (12); each inner chain link (11) comprises an inner chain plate (13); the inner side of the inner chain plate (13) is provided with two inner engagement teeth (132); each inner engagement tooth (132) has two engagement surfaces (131); the sprocket wheel (2) is provided with outer engagement teeth (21); each inner chain link (11) is internally provided with at least one shock absorption chain plate (14), and the inner side of the shock absorption chain plate (14) is provided with shock absorption teeth (141); each shock absorption tooth (141) has shock absorption surfaces (142), and a plurality of engagement protrusions (145) are distribution on each shock absorption surface (142); a shock absorption pad (3) made of an elastic material is provided on the sprocket wheel (2), and the shock absorption pad (3) is located on the side surfaces of the outer engagement teeth (21). The high-speed silent chain transmission system can adjust the damping characteristic of the chain, reduce the noise of the chain transmission system in a shock absorption mode, and expand the application scenario of the chain transmission system.

Description

A high-speed silent chain transmission system for electric vehicles Technical Field

[0001] The present invention relates to the field of chain transmission, and in particular to a high-speed silent chain transmission system for electric vehicles. Background Art

[0002] Chain drive systems are a common transmission structure in the mechanical field. There are many different types of chains, including toothed chains. Toothed chains consist of inner links connected to each other in a ring-like pattern by outer link plates. The inner links consist of inner link plates with internal teeth on the inner side. These teeth mesh with the outer teeth on the corresponding sprockets.

[0003] In the existing toothed chain, when the chain meshes with the sprocket, due to the different linear speeds of the inner and outer teeth at the moment of engagement, a certain rigid impact will be generated between the inner and outer teeth. The rigid impact will cause problems such as loud noise and reduced service life, affecting the use effect.

[0004] The contact impact between the internal and external teeth increases with speed, making the problem more pronounced at high speeds. For example, electric vehicles commonly use toothed chain drives. The motor speeds are much higher than those of conventional fuel vehicles, generating significantly higher vibration and noise than conventional vehicles. This makes the noise problem of chain drive systems even more pronounced.

[0005] The purpose of this application is to provide a high-speed silent chain that can effectively reduce operating noise based on the above-mentioned characteristics of the chain transmission system.

[0006] Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a high-speed silent chain drive system for electric vehicles, which can adjust the damping characteristics of the chain, reduce the noise of the chain drive system through vibration reduction, and expand the applicable scenarios of the chain drive system.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a high-speed silent chain transmission system for an electric vehicle, comprising a chain and a sprocket, wherein the chain comprises a plurality of inner chain links distributed in an annular shape, and each two adjacent inner chain links are connected by an outer chain plate; the inner chain link comprises an inner chain plate, and the inner side of the inner chain plate is provided with two inner meshing teeth, and the inner meshing teeth have two meshing surfaces; the sprocket is provided with outer meshing teeth, and the outer meshing teeth match the inner meshing teeth;

[0009] Each of the inner chain links is provided with at least one vibration-damping chain plate, the vibration-damping chain plate being made of an elastic material; the inner side of the vibration-damping chain plate is provided with vibration-damping teeth, the vibration-damping teeth being arranged in a one-to-one correspondence with the inner meshing teeth; the vibration-damping teeth are provided with a vibration-damping surface, the vibration-damping surface being distributed with a plurality of meshing protrusions, the meshing protrusions being arranged to protrude relative to the meshing surface;

[0010] The sprocket is provided with a vibration-damping pad made of elastic material. The vibration-damping pad is located on the side surface of the outer meshing teeth and is arranged in a ring shape around the rotation center of the sprocket.

[0011] Because the meshing protrusions protrude relative to the meshing surface, when the chain and sprocket mesh, the outer teeth first come into contact with the meshing protrusions during engagement. Because the damping chain plates are made of an elastic material, the engagement of the outer teeth compresses the meshing protrusions, forcing them to deform and absorb energy. This reduces the impact energy of the subsequent meshing of the outer and inner teeth, lowering operating noise and enabling better adaptation to high-speed operating conditions.

[0012] In addition, during the meshing process of the chain and sprocket, there is also a certain impact noise in the contact between the outer link plate and the sprocket. By setting a vibration damping pad, the contact between the outer link plate and the sprocket can be effectively buffered, thereby further reducing the operating noise.

[0013] Preferably, the vibration-damping chain plates and vibration-damping pads are made of rubber or nylon.

[0014] Preferably, a deformation notch is provided between two adjacent engagement protrusions on the vibration-damping surface, and the deformation notch is concave relative to the engagement surface.

[0015] When the meshing protrusions are squeezed by the outer meshing teeth, they generate significant internal stress. If this internal stress cannot be effectively released, the service life of the vibration damping chain plate will be affected. The deformation notch provides space for the meshing protrusions to deform during extrusion, releasing internal stress and ensuring that the vibration damping chain plate always operates within the elastic deformation range, thereby extending the service life of the vibration damping chain plate.

[0016] Preferably, the protruding height of the engaging protrusion relative to the engaging surface is 0.02 to 1 mm, and the concave depth of the deformation notch relative to the engaging surface is 0.02 to 1 mm.

[0017] Preferably, a plurality of vibration-damping bosses are distributed on the outer edge surface of the vibration-damping pad, and the vibration-damping bosses correspond one-to-one to the external meshing teeth; and the height of the vibration-damping bosses is 0.02-1 mm.

[0018] During the contact between the outer link plate and the vibration damping pad, the vibration damping boss can deform and absorb energy, further improving the vibration damping effect.

[0019] Preferably, an outer side surface of the vibration-damping chain plate is provided with an outer vibration-damping portion, and the outer vibration-damping portion is protruding relative to the outer side surface of the inner link plate.

[0020] The outer vibration damping part can be deformed when the outer side of the chain contacts external equipment, thereby playing a vibration damping and buffering role, further reducing operating noise.

[0021] Preferably, the protruding height of the outer vibration damping portion relative to the outer side surface of the inner link plate is 0.1 to 2 mm.

[0022] Preferably, vibration-damping chain plates are provided on both sides of the inner chain link, and the inner chain link and the outer chain plate jointly press the vibration-damping chain plates.

[0023] Since the vibration-damping chain plate has a certain elastic deformation capacity, under the premise of ensuring normal operation, the lateral clearance between the inner chain plate and the outer chain plate can be eliminated by compression, thereby improving the smoothness of chain operation and eliminating the operating noise caused by lateral movement between the inner chain plate and the outer chain plate.

[0024] In addition, arranging the vibration-damping chain plates on both sides of the inner chain links can ensure that the inner chain plates are fully engaged with the sprockets, thereby meeting the requirements of load transfer.

[0025] Preferably, each of the inner chain links includes at least two inner chain plates; a reinforcing chain plate is provided between two adjacent inner chain links, and the reinforcing chain plate is aligned with the outer chain plate and is located between two adjacent inner chain plates in the same inner chain link.

[0026] Preferably, a vibration-damping chain plate is distributed on at least one side of the reinforcing chain plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic structural diagram of a high-speed silent chain transmission system for an electric vehicle according to an embodiment of the present invention;

[0028] FIG2 is a schematic diagram of a partial structure of a high-speed silent chain transmission system for an electric vehicle according to this embodiment;

[0029] FIG3 is a schematic diagram of a partial structure of a chain in a high-speed silent chain transmission system for an electric vehicle according to this embodiment;

[0030] FIG4 is a top view of a chain in a high-speed silent chain transmission system for an electric vehicle according to this embodiment;

[0031] FIG5 is a schematic structural diagram of the cooperation between the inner chain plate and the vibration-damping chain plate in the high-speed silent chain transmission system for electric vehicles according to this embodiment;

[0032] FIG6 is a rear side view of the inner chain plate and the vibration-damping chain plate in the high-speed silent chain transmission system for electric vehicles according to this embodiment;

[0033] FIG7 is a schematic diagram of the partial structure of the inner chain plate and the vibration-damping chain plate in the high-speed silent chain transmission system for electric vehicles according to this embodiment;

[0034] FIG8 is a schematic diagram of the partial structure of the outer chain plate and the vibration damping pad in the high-speed silent chain transmission system for electric vehicles according to this embodiment. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] Example

[0037] As shown in Figures 1-4, a high-speed silent chain drive system for an electric vehicle includes a chain 1 and a sprocket 2. The chain 1 comprises a plurality of inner chain links 11 arranged in a ring, with each adjacent inner chain link 11 connected by an outer link plate 12. As shown in Figures 4-6, the inner chain links 11 include inner link plates 13, each inner side of which is provided with two inner meshing teeth 132, each of which has two meshing surfaces 131. The sprocket 2 is provided with outer meshing teeth 21, which mate with the inner meshing teeth 132.

[0038] As shown in Figures 4 to 6, each of the inner chain links 11 is provided with at least one vibration-damping chain plate 14, and the vibration-damping chain plate 14 is made of an elastic material. Specifically, the vibration-damping chain plate 14 is made of rubber or nylon. The inner side of the vibration-damping chain plate 14 is provided with a vibration-damping tooth 141, and the vibration-damping tooth 141 is arranged in a one-to-one correspondence with the inner meshing tooth 132. As shown in Figures 5 to 7, the vibration-damping tooth 141 is provided with a vibration-damping surface 142, and the vibration-damping surface 142 is distributed with a plurality of meshing protrusions 145, and the meshing protrusions 145 are arranged to protrude relative to the meshing surface 131. Specifically, the protruding height of the meshing protrusion 145 relative to the meshing surface 131 is 0.02 to 1 mm.

[0039] Specifically, as shown in FIG. 5 , both tooth surfaces of the vibration-damping tooth 141 are vibration-damping surfaces 142 , which can simultaneously meet the vibration-damping requirements of both internal meshing and external meshing.

[0040] Because the engagement protrusions 145 protrude relative to the engagement surface 131, during the meshing of the chain 1 and sprocket 2, the outer teeth 21 first come into contact with the engagement protrusions 145. Because the vibration-damping chain plate 14 is made of an elastic material, the engagement of the outer teeth 21 compresses the engagement protrusions 145, forcing them to deform and absorb energy. This reduces the impact energy during the subsequent meshing of the outer teeth 21 and the inner teeth 132, lowering operating noise and enabling better adaptation to high-speed operating conditions.

[0041] 7 , a deformation notch 144 is provided between two adjacent engagement protrusions 145 on the vibration damping surface 142. The deformation notch 144 is recessed relative to the engagement surface 131. The depth of the deformation notch 144 relative to the engagement surface 131 is 0.02 to 1 mm.

[0042] When the meshing protrusions 145 are squeezed by the outer meshing teeth 21, they generate significant internal stress. If this internal stress cannot be effectively released, the service life of the vibration-damping chain plate 14 will be affected. The provision of the deformation notch 144 provides space for the meshing protrusions 145 to be squeezed and deformed, relieving the internal stress and ensuring that the vibration-damping chain plate 14 always operates within the elastic deformation range, thereby extending the service life of the vibration-damping chain plate 14.

[0043] Specifically, as shown in FIG. 4 , vibration-damping chain plates 14 are respectively provided on both sides of the inner chain link 11 , and the inner chain link 11 and the outer chain plates 12 jointly press the vibration-damping chain plates 14 .

[0044] Because the damping plates 14 have a certain degree of elastic deformation, they can eliminate lateral clearance between the inner and outer plates 13, 12 by compressing them while ensuring normal operation. This improves the smooth operation of the chain 1 and eliminates operating noise caused by lateral movement between the inner and outer plates 13, 12. Furthermore, positioning the damping plates 14 on both sides of the inner link 11 ensures full engagement between the inner plates 13 and the sprocket 2, thereby meeting load transfer requirements.

[0045] Furthermore, as shown in Figures 1 and 8 , the sprocket 2 is equipped with a vibration-damping pad 3 made of an elastic material. The pad 3 is located on the side of the external meshing teeth 21 and is arranged in a ring around the sprocket's rotation center. The vibration-damping chain plate 14 and the pad 3 are made of rubber or nylon. Specifically, the outer edge of the pad 3 is provided with a plurality of vibration-damping bosses 31, each corresponding to one of the external meshing teeth 21. The height of each boss 31 is 0.02 to 1 mm.

[0046] During the meshing of the chain 1 and sprocket 2, the contact between the outer link plates 12 and sprocket 2 also produces a certain amount of impact noise. The provision of vibration-damping pads effectively cushions the contact between the outer link plates 12 and sprocket 2, further reducing operating noise. During the contact between the outer link plates 12 and the vibration-damping pads, the vibration-damping bosses 31 deform to absorb energy, further enhancing the vibration-damping effect.

[0047] Furthermore, as shown in Figures 5 and 6, the outer side of the vibration-damping chain plate 14 is provided with an outer vibration-damping portion 143. This outer vibration-damping portion 143 protrudes from the outer side of the inner chain plate 13. The protrusion height of the outer vibration-damping portion 143 relative to the outer side of the inner chain plate 13 is 0.1 to 2 mm. This outer vibration-damping portion deforms when the outer side of the chain 1 contacts external equipment, thereby providing a vibration-damping and buffering effect, further reducing operating noise.

[0048] As a specific embodiment, as shown in FIG4 , each inner link 11 includes at least two inner link plates 13. A reinforcing link plate 15 is provided between two adjacent inner link plates 11. The reinforcing link plate 15 is aligned with the outer link plates 12 and is located between two adjacent inner link plates 13 in the same inner link 11. A vibration-damping link plate 14 is provided on at least one side of the reinforcing link plate.

[0049] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-speed silent chain drive system for an electric vehicle, comprising a chain and a sprocket, wherein the chain comprises a plurality of inner chain links arranged in an annular pattern, with each adjacent inner chain link connected by an outer chain plate; the inner chain link comprises an inner chain plate, wherein the inner side of the inner chain plate is provided with two inner meshing teeth, each inner meshing tooth having two meshing surfaces; the sprocket is provided with outer meshing teeth, the outer meshing teeth matching the inner meshing teeth; Its characteristics are: Each of the inner chain links is provided with at least one vibration-damping chain plate, the vibration-damping chain plate being made of an elastic material; the inner side of the vibration-damping chain plate is provided with vibration-damping teeth, the vibration-damping teeth being arranged in a one-to-one correspondence with the inner meshing teeth; the vibration-damping teeth are provided with a vibration-damping surface, the vibration-damping surface being distributed with a plurality of meshing protrusions, the meshing protrusions being arranged to protrude relative to the meshing surface; The sprocket is provided with a vibration-damping pad made of elastic material. The vibration-damping pad is located on the side surface of the outer meshing teeth and is arranged in a ring shape around the rotation center of the sprocket.

2. The high-speed silent chain transmission system according to claim 1, characterized in that: The vibration-damping chain plates and vibration-damping pads are made of rubber or nylon.

3. The high-speed silent chain transmission system according to claim 1, characterized in that: A deformation notch is provided between two adjacent engagement protrusions on the vibration-damping surface, and the deformation notch is concave relative to the engagement surface.

4. The high-speed silent chain transmission system according to claim 3, characterized in that: The protruding height of the engaging protrusion relative to the engaging surface is 0.02 to 1 mm, and the concave depth of the deformation notch relative to the engaging surface is 0.02 to 1 mm.

5. The high-speed silent chain transmission system according to claim 1, characterized in that: A plurality of vibration-damping bosses are distributed on the outer edge surface of the vibration-damping pad, and the vibration-damping bosses correspond one-to-one to the external meshing teeth; the height of the vibration-damping bosses is 0.02-1 mm.

6. The high-speed silent chain transmission system according to claim 1, characterized in that: An outer vibration-damping portion is provided on the outer side surface of the vibration-damping chain plate, and the outer vibration-damping portion is protruded relative to the outer side surface of the inner chain plate.

7. The high-speed silent chain transmission system according to claim 6, characterized in that: The protrusion height of the outer vibration damping portion relative to the outer side surface of the inner link plate is 0.1 to 2 mm.

8. The high-speed silent chain transmission system according to any one of claims 1 to 7, characterized in that: Vibration-damping chain plates are respectively provided on both sides of the inner chain link, and the inner chain link and the outer chain plate jointly press the vibration-damping chain plates.

9. The high-speed silent chain transmission system according to claim 8, characterized in that: Each of the inner chain links includes at least two inner chain plates; a reinforcing chain plate is provided between two adjacent inner chain links, and the reinforcing chain plate is aligned with the outer chain plate and is located between two adjacent inner chain plates in the same inner chain link.

10. The high-speed silent chain transmission system according to claim 9, characterized in that: A vibration-damping chain plate is distributed on at least one side of the reinforcing chain plate.

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