Dust cover, driving assembly and vehicle

Abstract

The utility model provides a dust cover, drive subassembly and vehicle, dust cover includes cover body, major diameter end connecting edge and minor diameter end connecting edge, major diameter end connecting edge and minor diameter end connecting edge are respectively connected to the both ends of cover body, the cover body along the axial direction includes a plurality of wave crest structure and wave trough structure that alternate connection in proper order, the wave crest structure is provided with a large-diameter end wave crest face facing the large-diameter end connecting edge and a small-diameter end wave crest face facing the small-diameter end connecting edge, and at least one of the large-diameter end wave crest face and the small-diameter end wave crest face is provided with a drainage groove. The drainage grooves extend from the positions close to the trough structures to the positions away from the trough structures. According to the dustproof cover, the contact area and the water amount between the two adjacent wave crest structures are reduced, so that the siphonic effect and the stick-slip effect between the two adjacent wave crest structures are reduced, and the periodic abnormal sound of a vehicle in the large-angle steering process is relieved or eliminated.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle accessories, and particularly relates to a dust cover, a driving assembly and a vehicle. Background Art

[0002] With the improvement of people's living standards, the requirements for the comfort of riding in vehicles are also getting higher and higher. The vehicle drive shaft plays a crucial role in reducing the noise of vehicle steering and starting. At present, the dust covers on the drive shafts of most vehicle models are elastic bodies made of active noise reduction materials, and lubricating components will naturally precipitate on the material surface to reduce frictional noise. With the improvement of customers' requirements for riding comfort, the time for this material to naturally recover the ability to precipitate lubricating components is relatively long, and it can no longer meet the customers' requirements. In addition, this material cannot completely eliminate the abnormal noise problem under special working conditions. For example, when the vehicle is running, the lubricating components (such as wax and grease) on the material surface are washed away or damaged due to wading. When the vehicle turns, due to the influence of the stiffness of the transmission system, there is a certain torsional angle from the power output end to the wheel end of the dust cover, and the dust cover also twists accordingly. The adjacent two wave peak surfaces are squeezed against each other. When the surface of the dust cover is wetted by water, water generates adhesion on its surface, forming a siphon effect and a stick-slip effect, increasing the friction coefficient between the two contacting wave peak surfaces. Therefore, the dust cover rubs during rotation, thereby causing periodic abnormal noise. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a dust cover, a driving assembly and a vehicle, aiming to solve the technical problem that the existing dust cover generates abnormal noise when the vehicle turns.

[0004] To achieve the above purpose, the technical solutions adopted by the utility model are as follows:

[0005] In the first aspect, a dust cover is provided, which includes a cover body, a large-diameter end connecting edge and a small-diameter end connecting edge. The large-diameter end connecting edge and the small-diameter end connecting edge are respectively connected to both ends of the cover body. The cover body axially includes a plurality of alternately connected wave crest structures and wave trough structures in sequence. The wave crest structure has a large-diameter end wave crest surface facing the large-diameter end connecting edge and a small-diameter end wave crest surface facing the small-diameter end connecting edge. At least one of the large-diameter end wave crest surface and the small-diameter end wave crest surface is provided with a drainage groove, and the drainage groove extends from a position close to the wave trough structure towards a position away from the wave trough structure.

[0006] In one of the embodiments of the first aspect, the drainage grooves are provided on both the large-diameter end wave crest surface and the small-diameter end wave crest surface.

[0007] In one of the embodiments of the first aspect, the drainage groove is in a net shape surrounding the wave trough structure.

[0008] In one embodiment of the first aspect, the drain groove includes a plurality of first groove portions and a plurality of second groove portions. The extending direction of the first groove portion is deflected toward the first rotation direction, and the extending direction of the second groove portion is deflected toward the second rotation direction. The first rotation direction is opposite to the second rotation direction. A plurality of the first groove portions are arranged parallel and equidistantly around the trough structure, and a plurality of the second groove portions are arranged parallel and equidistantly around the trough structure. The first groove portions and the second groove portions are staggered with each other.

[0009] In one embodiment of the first aspect, the angle by which the extending direction of the first groove portion is deflected toward the first rotation direction is 5°-30°, and the angle by which the extending direction of the second groove portion is deflected toward the second rotation direction is 5°-30°.

[0010] In one embodiment of the first aspect, the drain groove is formed by enclosing a plurality of convex platforms with irregular shapes and spaced apart from each other.

[0011] In one embodiment of the first aspect, the drain groove on the large-diameter end wave crest surface is spaced apart from the drain groove on the small-diameter end wave crest surface.

[0012] In a second aspect, a drive assembly is provided, including a first universal joint, a shaft rod, and the dust cover described in the above embodiments. One end of the shaft rod is connected to the first universal joint. The large-diameter end connecting edge is sealingly sleeved outside the first universal joint, and the small-diameter end connecting edge is sealingly sleeved outside the shaft rod.

[0013] In one embodiment of the second aspect, the large-diameter end connecting edge sequentially includes a connected first fixing section and a first connecting section along the axial direction. The cover body is connected to the first connecting section. The first fixing section is fixedly connected to the first universal joint. The first connecting section is disposed around the first universal joint and is spaced apart from the first universal joint. And / or, the small-diameter end connecting edge sequentially includes a connected second fixing section and a second connecting section along the axial direction. The cover body is connected to the second connecting section. The second fixing section is fixedly connected to the shaft rod. The second connecting section is disposed around the shaft rod and is spaced apart from the shaft rod.

[0014] In a third aspect, a vehicle is provided, including the drive assembly described in the above embodiments.

[0015] The technical effects of the present utility model relative to the prior art are as follows: When the vehicle makes a large-angle turn and the driving component twists, the cover body twists accordingly. The turning sides of two adjacent wave crest structures squeeze against each other. During the squeezing process, the ends of the two wave crest structures close to the wave trough structure are squeezed first, and then the squeezing surface gradually increases in the direction away from the wave trough structure until the large-diameter end wave crest surfaces and the small-diameter end wave crest surfaces facing each other on the turning sides of the two adjacent wave crest structures are completely fitted radially. During this process, since at least one of the large-diameter end wave crest surface and the small-diameter end wave crest surface is provided with a drainage groove, during the twisting process of the driving component, the water bodies on the large-diameter end wave crest surface and the small-diameter end wave crest surface are gradually squeezed radially from the inside to the outside into the drainage groove, so that the water bodies in the drainage groove flow from the inside to the outside until they flow out from the outer end of the drainage groove. Since the water bodies on the large-diameter end wave crest surface and the small-diameter end wave crest surface are squeezed into the drainage groove during the squeezing process, the area of the contacting large-diameter end wave crest surface and small-diameter end wave crest surface and the amount of water between the large-diameter end wave crest surface and the small-diameter end wave crest surface are reduced, thereby reducing the siphon effect and the stick-slip effect between the two adjacent wave crest structures, and reducing the friction coefficient between the contacting large-diameter end wave crest surface and small-diameter end wave crest surface, thus reducing or eliminating the periodic abnormal noise during the large-angle turning of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments of the present utility model or the description of the prior art. Obviously, the following described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is a cross-sectional view of the driving component provided by an embodiment of the present utility model;

[0018] Figure 2 is Figure 1 the cross-sectional view of the driving component in [FIGURE] at A-A;

[0019] Figure 3 is a state diagram of the dust cover when the vehicle is at a large turning angle;

[0020] Figure 4 is Figure 1 the enlarged view at B in [FIGURE];

[0021] Figure 5 is Figure 1 the enlarged view at C in [FIGURE];

[0022] Figure 6 is a partial enlarged view at the drainage groove in some embodiments;

[0023] Figure 7 It is a partial enlarged view at the drain groove in some other embodiments.

[0024] Explanation of reference numerals:

[0025] 100, dust cover; 10, cover body; 11, wave crest structure; 111, large-diameter end wave crest surface; 112, small-diameter end wave crest surface; 113, tip surface; 12, wave trough structure; 101, drain groove; 1011, first groove portion; 1012, second groove portion; 1013, boss; 20, large-diameter end connecting edge; 21, first fixing section; 22, first connecting section; 30, small-diameter end connecting edge; 200, first universal joint; 300, shaft rod; 90, clamp. Detailed implementation manners

[0026] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0029] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0031] With the improvement of people's living standards, the requirements for the comfort of vehicles are also getting higher and higher. The drive shaft of a vehicle plays a crucial role in reducing the noise during vehicle steering and starting. Currently, the dust covers on the drive shafts of most vehicle models are made of elastomers with active noise reduction materials, and lubricating components will naturally precipitate on the material surface to reduce frictional noise. With the increasing requirements of customers for driving comfort, the time for this material to naturally recover the ability to precipitate lubricating components is relatively long and can no longer meet customer requirements. In addition, this material cannot completely eliminate abnormal noise problems under special working conditions. For example, during vehicle driving, when wading, the lubricating components (such as wax and grease) on the material surface are washed away or damaged. When the vehicle turns, due to the influence of the stiffness of the transmission system, there is a certain torsional angle from the power output end to the wheel end of the dust cover, and the dust cover twists accordingly. The adjacent two wave crest surfaces are squeezed against each other. Under the condition that the surface of the dust cover is wet with water, water generates adhesion on its surface, forming a siphon effect and a stick-slip effect. Contact friction, extrusion friction and separation friction are generated between the two contacting wave crest surfaces. The presence of water increases the friction coefficient between the two contacting wave crest surfaces. Therefore, the dust cover rubs during rotation, thereby causing periodic abnormal noise.

[0032] During vehicle operation, the internal parts of the dust cover roll and rub against each other, and lubrication and cooling with grease are required to extend its service life. Therefore, the sealing performance of the dust cover is extremely important for the retention of grease. Currently, the cost of the rubber and plastic materials widely used in the market is higher than that of rubber materials, and the processing technologies are different. The dust cover made of rubber material is manufactured by an injection molding process, and the dust cover made of rubber and plastic materials is manufactured by an injection molding process plus a blow molding process. Specifically, the large-diameter end connecting edge and the small-diameter end connecting edge of the dust cover are made by an injection molding process, and the main body part of the middle cover is made by a blow molding process. Considering the service performance, process and cost of the dust cover, the dust cover made of rubber and plastic materials is generally relatively thin, generally about 1.2 mm. When the vehicle travels on rough roads (such as gravel roads and Gobi roads), the sand or other hard objects rolled up by the tires will hit the exposed dust cover. In addition, when the drive assembly is disassembled and assembled during vehicle maintenance, it is inevitable to bump into the dust cover, especially at the large-diameter end connecting edge and the small-diameter end connecting edge. Due to the support of the universal joint, the two sides are easily damaged due to the shear force generated by being hit or bumped, resulting in the leakage of grease inside the dust cover and the wear and failure of the internal parts of the dust cover.

[0033] To solve the above problems, please refer to Figure 1 , this embodiment provides a dust cover 100, a drive assembly and a vehicle. The vehicle includes the drive assembly, and the drive assembly includes a first universal joint 200, a shaft rod 300 and the dust cover 100 provided in this embodiment.

[0034] The first universal joint 200 is a universal joint, which is a mechanical part for realizing power transmission at variable angles and is used in positions where the direction of the transmission axis needs to be changed. It is a "joint" component in the drive system of a vehicle. The shaft rod 300 is rod-shaped, and one end of the shaft rod 300 is connected to the first universal joint 200 to achieve multi-angle twisting of the shaft rod 300. Both ends of the dust cover 100 are respectively connected to the first universal joint 200 and the end of the shaft rod 300 far from the first universal joint 200. An installation cavity is formed inside the dust cover 100, and some grease can be retained in the installation cavity to lubricate and cool the parts inside the dust cover 100. Among them, both ends of the dust cover 100 can be hermetically connected to the first universal joint 200 and the shaft rod 300 through a clamp 90 or other connecting parts.

[0035] In other embodiments, the drive assembly may include a first universal joint, a second universal joint, a shaft rod, and the dust cover in the embodiment of the present application. Both ends of the shaft rod are respectively connected to the first universal joint and the second universal joint, and both ends of the dust cover are respectively connected to the first universal joint and the second universal joint, which is not limited herein.

[0036] Please refer to Figure 1 , a dust cover 100 in this embodiment includes a cover body 10, a large-diameter end connecting edge 20, and a small-diameter end connecting edge 30.

[0037] The large-diameter end connecting edge 20 and the small-diameter end connecting edge 30 are respectively connected to both ends of the cover body 10. The large-diameter end connecting edge 20 is hermetically sleeved outside the first universal joint 200, and the small-diameter end connecting edge 30 is hermetically sleeved outside the shaft rod 300. Among them, the cover body 10 is in a corrugated shape, one end of the cover body 10 has a large diameter, and the other end has a small diameter. Both the large-diameter connecting edge and the small-diameter connecting edge are annular, the circumference of the large-diameter connecting edge is greater than the circumference of the small-diameter connecting edge, the large-diameter end connecting edge 20 is connected to the large-diameter side of the cover body 10 and is connected to the edge of the large-diameter side of the cover body 10, and the small-diameter end connecting edge 30 is connected to the small-diameter side of the cover body 10 and is connected to the edge of the small-diameter side of the cover body 10.

[0038] The direction from the large-diameter end connecting edge 20 to the small-diameter end connecting edge 30 is the axial direction of the cover body 10. The cover body 10 includes a plurality of alternately connected peak structures 11 and valley structures 12 along the axial direction. Among them, both the peak structure 11 and the valley structure 12 are annular, and the cross-section of the valley structure 12 is approximately V-shaped, and the cross-section of the peak structure 11 is approximately inverted V-shaped. The peak structure 11 has a large-diameter end peak surface 111 facing the large-diameter end connecting edge 20 and a small-diameter end peak surface 112 facing the small-diameter end connecting edge 30. The cover body 10 can be axially telescoped and deformed, and at this time, the angle between the large-diameter end peak surface 111 and the small-diameter end peak surface 112 alternately increases and decreases.

[0039] In this embodiment, the cover body 10, the large-diameter end connecting edge 20 and the small-diameter end connecting edge 30 are integrally formed and are all made of elastic materials, such as rubber materials or rubber-plastic materials.

[0040] Please refer to Figure 2 , at least one of the large-diameter end wave crest surface 111 and the small-diameter end wave crest surface 112 is provided with a drainage groove 101, and the drainage groove 101 extends from a position close to the trough structure 12 towards a position away from the trough structure 12. Among them, the drainage groove 101 can be formed into a regular shape or an irregular shape. In the following embodiments, the side of the drainage groove 101 close to the trough structure 12 is the inner side, and the side of the drainage groove 101 away from the trough structure 12 is the outer side.

[0041] Please refer to Figure 3 , when the vehicle makes a large-angle turn and the drive assembly twists, the cover body 10 twists accordingly, and is squeezed by the turning sides of two adjacent wave crest structures 11, and the reverse sides of the turning sides of two adjacent wave crest structures 11 open and stretch to adapt to the turning driving of the vehicle. One end of the two wave crest structures 11 on the turning side close to the trough structure 12 is first squeezed, and then the squeezing surface gradually increases in the direction away from the trough structure 12 until the large-diameter end wave crest surface 111 and the small-diameter end wave crest surface 112 facing each other on the turning sides of two adjacent wave crest structures 11 are completely fitted in the radial direction. During this process, since at least one of the large-diameter end wave crest surface 111 and the small-diameter end wave crest surface 112 is provided with a drainage groove 101, when the drive assembly twists, if there is water on the dust cover, the water on the large-diameter end wave crest surface 111 and the water on the small-diameter end wave crest surface 112 can be gradually squeezed from the inside to the outside in the radial direction into the drainage groove 101, so that the water in the drainage groove 101 flows from the inside to the outside until it flows out from the outer end of the drainage groove 101. Since the water on the large-diameter end wave crest surface 111 and the water on the small-diameter end wave crest surface 112 are squeezed into the drainage groove 101 during the squeezing process, the area of the large-diameter end wave crest surface 111 and the small-diameter end wave crest surface 112 in contact and the amount of water between the large-diameter end wave crest surface 111 and the small-diameter end wave crest surface 112 are reduced, thereby reducing the siphon effect and the stick-slip effect between two adjacent wave crest structures 11, reducing the friction coefficient between the large-diameter end wave crest surface 111 and the small-diameter end wave crest surface 112 in contact, thereby reducing or eliminating the periodic abnormal noise during the large-angle turning of the vehicle, improving the riding comfort of the vehicle, and the cost is not increased.

[0042] In some embodiments, please refer to Figure 4 and Figure 5, drainage grooves 101 are provided on both the large-diameter end wave crest surface 111 and the small-diameter end wave crest surface 112 to further reduce the contact area between the large-diameter end wave crest surface 111 and the small-diameter end wave crest surface 112 in contact and improve the drainage effect. It should be noted that the opening shapes of the drainage grooves 101 on the large-diameter end wave crest surface 111 and the drainage grooves 101 on the small-diameter end wave crest surface 112 may be the same or different, and no limitation is made here.

[0043] In other embodiments, the drainage groove 101 may be provided only on the large-diameter end wave crest surface 111 and not on the small-diameter end wave crest surface 112, or the drainage groove 101 may be provided only on the small-diameter end wave crest surface 112 and not on the large-diameter end wave crest surface 111.

[0044] In some embodiments, please refer to Figure 6 , the drainage groove 101 is in a net shape to increase the distribution area of the drainage groove 101, facilitating the water body on the large-diameter end wave crest surface 111 and the small-diameter end wave crest surface 112 to be squeezed into the drainage groove 101.

[0045] As one of the implementation manners, please refer to Figure 6 , the drainage groove 101 includes a plurality of first groove portions 1011 and a plurality of second groove portions 1012. The extending direction of the first groove portion 1011 deflects toward the first rotation direction, and the extending direction of the second groove portion 1012 deflects toward the second rotation direction. The first rotation direction is opposite to the second rotation direction. The first rotation direction may be the clockwise direction around the central axis of the cover body 10, and the second rotation direction may be the counterclockwise direction around the central axis of the cover body 10. The plurality of first groove portions 1011 are arranged parallel and equidistantly around the wave crest structure 11, and the plurality of second groove portions 1012 are arranged parallel and equidistantly around the wave crest structure 11. The first groove portion 1011 and the second groove portion 1012 are staggered to form the net-shaped drainage groove 101. Since the driving component may rotate by a certain angle during the torsion process, the first groove portion 1011 with the first rotation direction deflection and the second groove portion 1012 with the second rotation direction deflection are provided to better adapt to the centrifugal direction of the driving component, so that the water body can flow in the drainage groove 101 along the screwing direction until it is extruded from the outer end of the drainage groove 101.

[0046] Optionally, since the screwing angle of the driving component during the torsion process is approximately 5° - 15°, in this embodiment, the angle by which the extending direction of the first groove portion 1011 deflects toward the first rotation direction is 5° - 30°, and the angle by which the extending direction of the second groove portion 1012 deflects toward the second rotation direction is 5° - 30°, so that the first groove portion 1011 and the second groove portion 1012 are more adapted to the centrifugal direction of the driving component.

[0047] As another implementation manner, please refer to Figure 7, the drain groove 101 is formed by enclosing a plurality of convex platforms 1013 with irregular shapes and spaced apart from each other. It can be understood that the gaps between the plurality of convex platforms 1013 communicate with each other to form the drain groove 101. The tabletop of the convex platform 1013 forms a large-diameter end wave crest surface 111 or a small-diameter end wave crest surface 112. In this way, the requirements for the manufacturing process and error of the drain groove 101 are reduced. At the same time, the groove width at the grid intersection of the drain groove 101 is relatively large, facilitating the flow of water in the drain groove 101. Among them, the irregular shape means that the top tabletop of the convex platform 1013 is an irregular figure, and this irregular figure can be an irregular polygon, an irregular figure formed by enclosing with curves, or a figure formed by jointly enclosing with connected straight lines and curves, etc., and there is no limitation here.

[0048] In some embodiments, please refer to Figure 2 and Figure 3 , the drain groove 101 on the large-diameter end wave crest surface 111 is spaced apart from the drain groove 101 on the small-diameter end wave crest surface 112. It can be understood that the large-diameter end wave crest surface 111 and the small-diameter end wave crest surface 112 are connected by a pointed end surface 113, and the pointed end surface 113 forms the tip of the wave crest structure 11. The outer ends of the drain groove 101 on the large-diameter end wave crest surface 111 and the outer ends of the drain groove 101 on the small-diameter end wave crest surface 112 both terminate at the pointed end surface 113. When the driving component is twisted to the maximum angle, the pointed end surface 113 is not squeezed. In this way, after the water in the drain groove 101 is extruded from the outer end of the drain groove 101, it converges on the pointed end surface 113. The water on the pointed end surface 113 can be thrown out under the action of centrifugal force as the vehicle travels, thus avoiding the inward backflow of water and causing repeated abnormal noises. At the same time, it is avoided that the water in the drain groove 101 on the large-diameter end wave crest surface 111 is connected with the water in the drain groove 101 on the small-diameter end wave crest surface 112, resulting in difficulty in throwing out the water from the drain groove 101.

[0049] In other embodiments, the drain groove 101 may also extend to the pointed end surface 113, and there is no limitation here.

[0050] In some embodiments, the groove side wall at the outer end of the drain groove 101 can be inclined so that the bottom of the drain groove 101 and the pointed end surface 113 have a smooth transition, facilitating the water in the drain groove 101 to flow out along the inclined groove side wall.

[0051] In the above embodiments, the large-diameter end connecting edge 20 and the small-diameter end connecting edge 30 are both made by injection molding process, and the cover body 10 can be made by blow molding process. The above drain groove 101 can be formed by a mold during the blow molding process.

[0052] In some embodiments, please refer to Figure 1The large diameter end connecting edge 20 includes a first fixed section 21 and a first connecting section 22 connected in sequence along the axial direction. The cover body 10 is connected to the first connecting section 22. The first fixed section 21 is fixedly connected to the first universal joint 200. The first connecting section 22 is arranged around the first universal joint 200 and is spaced from the first universal joint 200. In this way, the gap between the first connecting section 22 and the first universal joint 200 forms a buffer zone during collision, thereby preventing the first connecting section 22 from contacting the first universal joint 200 when being bumped, thereby improving the anti-bumping performance of the dust cover 100, preventing the sealing failure at the first connecting section 22 from causing grease leakage in the dust cover 100, and improving the overall service life of the drive assembly.

[0053] In some embodiments, the small-diameter end connecting edge 30 includes a second fixed section and a second connecting section connected in sequence along the axial direction, the cover body 10 is connected to the second connecting section, the second fixed section is fixedly connected to the shaft 300, and the second connecting section is arranged around the shaft 300 and is spaced from the shaft 300. In this way, the gap between the second connecting section and the shaft 300 forms a buffer zone when bumped, preventing the second connecting section from contacting the shaft 300 when bumped, thereby improving the anti-bumping performance of the dust cover 100, preventing the seal failure at the second connecting section from causing grease leakage in the dust cover 100, and improving the overall service life of the drive assembly.

[0054] In other embodiments, only the first connecting section 22 may be spaced apart from the first universal joint 200, while the second connecting section may be in contact with the shaft rod 300; or, only the second connecting section may be spaced apart from the shaft rod 300, while the first connecting section 22 may be in contact with the first universal joint 200. There is no limitation here.

[0055] The above description is only a preferred embodiment of the utility model, and only specifically describes the technical principle of the utility model. These descriptions are only for explaining the principle of the utility model and cannot be interpreted as limiting the protection scope of the utility model in any way. Based on the explanation here, any modification, equivalent replacement and improvement made within the spirit and principle of the utility model, and other specific implementation methods of the utility model that can be associated with the technicians in this field without creative labor, should be included in the protection scope of the utility model.

Claims

1. A dust cover, characterized in that, It includes a cover body, a large-diameter end connecting edge and a small-diameter end connecting edge. The large-diameter end connecting edge and the small-diameter end connecting edge are respectively connected to both ends of the cover body. The cover body axially includes a plurality of alternately connected crest structures and trough structures in sequence. The crest structure has a large-diameter end crest surface facing the large-diameter end connecting edge and a small-diameter end crest surface facing the small-diameter end connecting edge. At least one of the large-diameter end crest surface and the small-diameter end crest surface is provided with a drainage groove. The drainage groove extends from a position close to the trough structure towards a position away from the trough structure, and the drainage groove is in a net shape surrounding the trough structure.

2. The dust cover according to claim 1, characterized in that, The drainage groove is provided on both the large-diameter end crest surface and the small-diameter end crest surface.

3. The dust cover according to claim 1, characterized in that, The drainage groove includes a plurality of first groove parts and a plurality of second groove parts. The extending direction of the first groove part deflects towards a first rotation direction, and the extending direction of the second groove part deflects towards a second rotation direction. The first rotation direction is opposite to the second rotation direction. A plurality of the first groove parts are arranged around the trough structure in parallel and at equal intervals, and a plurality of the second groove parts are arranged around the trough structure in parallel and at equal intervals. The first groove part and the second groove part are staggered.

4. The dust cover according to claim 3, characterized in that, The angle by which the extending direction of the first groove part deflects towards the first rotation direction is 5°-30°, and the angle by which the extending direction of the second groove part deflects towards the second rotation direction is 5°-30°.

5. The dust cover according to claim 1, characterized in that, The drainage groove is surrounded by a plurality of convex platforms with irregular shapes and spaced apart from each other.

6. The dust cover according to claim 2, characterized in that, The drainage groove on the large-diameter end crest surface is spaced apart from the drainage groove on the small-diameter end crest surface.

7. A driving component, characterized in that, It includes a first universal joint, a shaft rod and a dust cover according to any one of claims 1 to 6. One end of the shaft rod is connected to the first universal joint. The large-diameter end connecting edge is sealingly sleeved outside the first universal joint, and the small-diameter end connecting edge is sealingly sleeved outside the shaft rod.

8. The drive assembly according to claim 7, wherein, The large-diameter end connecting edge axially sequentially includes a connected first fixing section and a first connecting section. The cover body is connected to the first connecting section. The first fixing section is fixedly connected to the first universal joint. The first connecting section is looped around the first universal joint and is spaced apart from the first universal joint. And / or, the small-diameter end connecting edge axially sequentially includes a connected second fixing section and a second connecting section. The cover body is connected to the second connecting section. The second fixing section is fixedly connected to the shaft rod. The second connecting section is looped around the shaft rod and is spaced apart from the shaft rod.

9. A vehicle, characterized in that, It includes a driving assembly according to claim 7 or 8.

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