Driving mechanism and vehicle

Abstract

The utility model provides a driving mechanism and a vehicle. The driving mechanism comprises a driving assembly and a dustproof assembly. The driving assembly comprises a universal joint and a shaft rod connected to the universal joint. The dustproof assembly comprises a dustproof cover, a metal cover and a sealing rib, the universal joint is sleeved with the first end of the metal cover, the second end of the metal cover is connected with the first end of the dustproof cover in a sealed mode, the shaft rod is sleeved with the second end of the dustproof cover, and the sealing rib is made of elastic materials. The sealing rib is annular and clamped between the metal cover and the universal joint, the sealing rib is provided with a first abutting ring face abutting against the metal cover and a second abutting ring face abutting against the universal joint, and at least the second abutting ring face is provided with a plurality of annular racks sequentially arranged in the axial direction. And the sealing ribs are equivalent to a plurality of O-shaped rings arranged between the universal joint and the metal cover, so that the sealing effect between the universal joint and the metal cover is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle parts, and in particular relates to a driving mechanism and a vehicle. Background Art

[0002] The dust cover in the drive mechanism of most current vehicles is directly connected to the universal joint. For cross-race universal joints, when the vehicle turns at a large angle, the inner star wheel in the universal joint also participates in the large-stroke sliding. During this process, the dust cover may be squeezed into the interior of the universal joint, causing damage to the dust cover. Therefore, a metal cover is often added between the dust cover and the universal joint. At this time, the dust cover and the metal cover together form a dustproof assembly to protect the universal joint and the shaft. The metal cover can increase the stiffness of the dustproof assembly.

[0003] In common drive mechanisms, the metal cover and the universal joint are sealed by an O-ring. However, many factors, such as the hardness dispersion of different metal covers, the width of the joint surface between the O-ring and the metal cover, the surface roughness of the metal cover, the processing accuracy of the metal cover and the universal joint, and the assembly accuracy error, may cause the metal cover to shift along the axial direction of the cross-raceway universal joint after being pressed, causing the extrusion force between the O-ring and the metal cover to change, resulting in uneven radial extrusion force between the metal cover, the outer star wheel of the universal joint, and the O-ring. With the slip and deflection of the inner star wheel, a pressure difference will be formed between the inside and the outside of the universal joint. When the air pressure in the universal joint is high, the base oil such as the grease inside it will be squeezed toward the side with less extrusion force, causing oil leakage in the drive mechanism. In the case of slight leakage, the oil in the drive mechanism will form oil stains on the surface of the drive mechanism. In the case of severe leakage, the oil will be thrown onto the high-temperature components with the rotation of the drive mechanism, causing smoke in the engine compartment of the vehicle where the drive mechanism is installed, causing customer complaints. Utility Model Content

[0004] The utility model aims to provide a driving mechanism and a vehicle, aiming to solve the technical problem that the existing driving mechanism is prone to oil leakage.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] In a first aspect, a driving mechanism is provided, including a driving component and a dustproof component.

[0007] The driving assembly includes a universal joint and a shaft connected to the universal joint;

[0008] The dustproof assembly includes a dust cover, a metal cover and a sealing rib, the first end of the metal cover is sleeved on the outside of the universal joint, the second end of the metal cover is sealed and connected to the first end of the dust cover, the second end of the dust cover is sleeved on the outside of the shaft, the sealing rib is made of elastic material, the sealing rib is annular and clamped between the metal cover and the universal joint, the sealing rib has a first abutting annular surface abutting the metal cover and a second abutting annular surface abutting the universal joint, at least the second abutting annular surface is formed with a plurality of annular racks arranged in sequence along the axial direction.

[0009] As one of the implementation modes, the first abutting annular surface is fixedly connected to the inner annular surface of the first end of the metal cover.

[0010] As one of the embodiments, the dustproof assembly further includes a clamp, which is sleeved on the outside of the first end of the metal cover and is used to clamp the metal cover toward the universal joint.

[0011] As one of the embodiments, a groove is formed on the outer annular surface of the first end of the metal cover, and the clamp is at least partially accommodated in the groove in the thickness direction.

[0012] As one of the implementation modes, the sealing rib is located between the clamp and the universal joint.

[0013] As one of the embodiments, a tightening groove is formed on the outer surface of the universal joint, the tightening groove surrounds the universal joint, and the sealing rib is at least partially received in the tightening groove in the radial direction.

[0014] As one of the embodiments, a rivet point groove is further provided on the outer surface of the universal joint, the rivet point groove surrounds the universal joint and is spaced apart from the tightening groove, and the metal cover is riveted into the rivet point groove.

[0015] As one of the embodiments, the metal cover has a plurality of riveting positions, and the plurality of riveting positions are arranged at equal intervals around the metal cover.

[0016] As one of the implementation modes, the rivet point groove is located on a side of the fastening groove close to the dust cover.

[0017] In a second aspect, a vehicle is provided, comprising a driving mechanism as described in the above embodiments.

[0018] The technical effect of the utility model relative to the prior art is: the driving mechanism replaces the O-ring between the universal joint and the metal cover in the current driving mechanism with a sealing rib, the sealing rib surrounds the outside of the universal joint and has a certain width in the axial direction, and a plurality of annular racks are formed on the second abutting annular surface of the sealing rib, each of which is equivalent to an O-ring of the current driving mechanism, so that the sealing rib is equivalent to setting a plurality of O-rings between the universal joint and the metal cover, improving the sealing effect between the universal joint and the metal cover, and at the same time, the setting of the annular rack on the second abutting annular surface can increase the roughness of the second abutting annular surface, in addition, because the sealing rib is elastic, after the metal cover is sleeved on the outside of the universal joint, the sealing rib is compressed in the radial direction, increasing the contact area between the annular rack and the universal joint, thus increasing the friction between the sealing rib and the universal joint, limiting the axial movement of the metal cover, and improving the stability and reliability of the connection between the metal cover and the universal joint. Secondly, the sealing rib can also buffer the circumferential and axial tensions generated by the universal joint on the metal cover when the shaft moves relative to the outer star wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a three-dimensional structural diagram of the driving mechanism provided by the embodiment of the utility model;

[0021] Figure 2 yes Figure 1 Exploded diagram of the drive mechanism in;

[0022] Figure 3 yes Figure 1 A partial cross-sectional view of the drive mechanism in FIG.

[0023] Description of reference numerals:

[0024] 10. Driving assembly; 11. Universal joint; 101. Tightening groove; 102. Riveting point groove; 20. Dustproof assembly; 201. Clamping groove; 202. Riveting position; 21. Dust cover; 22. Metal cover; 221. Cover body; 222. Connecting ring; 2221. First connecting section; 2222. Second connecting section; 23. Sealing rib; 231. Annular rack; 24. Clamp; 25. Clamp. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0026] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are 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 therefore cannot be understood as a limitation on the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] The utility model provides a driving mechanism and a vehicle, wherein the vehicle comprises the driving mechanism and realizes steering through the driving mechanism. The driving mechanism can reduce or avoid oil leakage, and the vehicle can avoid oil in the driving mechanism from being thrown onto other parts, thereby causing smoke in the engine room, by arranging the driving mechanism.

[0031] See also Figure 1The driving mechanism includes a driving assembly 10 and a dustproof assembly 20. The dustproof assembly 20 is sleeved outside the driving assembly 10 and is used to protect the driving assembly 10 and prevent oil leakage between the driving assembly 10 and the dustproof assembly 20. The driving mechanism has a first end and a second end along the axial direction. In the illustrated embodiment, the first end represents the lower end and the second end represents the upper end.

[0032] The driving assembly 10 includes a universal joint 11 and a shaft connected to the universal joint 11. The shaft is torsionally twisted through the universal joint 11.

[0033] In this embodiment, the universal joint 11 can be a cross-track universal joint 11, which includes an inner wheel, an outer star wheel and a ball, the outer star wheel surrounds the inner star wheel, and the ball is located between the inner wheel and the outer star wheel to achieve the torsion of the inner wheel in the outer star wheel. The first end of the shaft is connected to the inner star wheel, and the dustproof component 20 is connected to the outer star wheel and the shaft, and together with the outer star wheel and the shaft, forms a sealed accommodating chamber, and oil can be retained in the accommodating chamber to lubricate and cool the drive component 10.

[0034] Please combine Figure 2 The dustproof assembly 20 includes a dustproof cover 21 , a metal cover 22 and a sealing rib 23 .

[0035] The metal cover 22 can be elastically deformed to a certain extent, and the metal cover is made of metal material, such as copper, stainless steel, etc. The first end of the metal cover 22 is sleeved on the outside of the universal joint 11, specifically, on the outside of the outer star wheel. The second end of the metal cover 22 is sealed and connected to the first end of the dust cover 21, and the sealing connection method is to first sleeve the first end of the dust cover 21 on the second end of the metal cover 22, and then clamp the dust cover 21 on the outside of the metal cover 22 through the clamp 25. The second end of the dust cover 21 is sleeved on the outside of the shaft. The second end of the dust cover 21 is sealed and connected to the shaft, and the sealing connection method is to first sleeve the second end of the dust cover 21 on the shaft, and then clamp the dust cover 21 on the outside of the shaft through the clamp 25. Among them, a buffer groove can be opened on the outer ring surface of the first end of the dust cover 21. When the clamp 25 clamps the dust cover 21, the buffer groove is located on the inner side of the clamp 25, and the elastic deformation of the part of the dust cover 21 located between the clamp 25 and the metal cover 22 can be absorbed by the buffer groove.

[0036] The sealing rib 23 is a sealing rib 23 made of an elastic material, such as rubber material, polyurethane elastomer (PU), etc. The sealing rib 23 is annular and clamped between the metal cover 22 and the universal joint 11 to seal the connection between the metal cover 22 and the universal joint 11. The sealing rib 23 has a first abutting annular surface and a second abutting annular surface opposite to each other. The first abutting annular surface abuts against the metal cover 22, specifically against the inner annular surface of the first end of the metal cover 22, and the second abutting annular surface abuts against the universal joint 11, specifically against the outer annular surface of the outer star wheel. At least a plurality of annular racks 231 arranged in sequence along the axial direction are formed on the second abutting annular surface, so that the cross section of the second abutting annular surface is sawtooth-shaped.

[0037] The driving mechanism replaces the O-ring between the universal joint 11 and the metal cover 22 in the current driving mechanism with a sealing rib 23. The sealing rib 23 surrounds the outside of the universal joint 11 and has a certain width in the axial direction. A plurality of annular racks 231 are formed on the second abutting annular surface of the sealing rib 23. Each annular rack 231 is equivalent to an O-ring of the current driving mechanism. In this way, the sealing rib 23 is equivalent to a plurality of O-rings between the universal joint 11 and the metal cover 22, thereby improving the sealing between the universal joint 11 and the metal cover 22. The sealing effect is improved. At the same time, the setting of the annular rack 231 on the second abutting annular surface can increase the roughness of the second abutting annular surface. In addition, since the sealing rib 23 is elastic, after the metal cover 22 is sleeved on the outside of the universal joint 11, the sealing rib 23 is compressed in the radial direction, increasing the contact area between the annular rack 231 and the universal joint 11, thereby increasing the friction between the sealing rib 23 and the universal joint 11, limiting the axial movement of the metal cover 22, and improving the stability and reliability of the connection between the metal cover 22 and the universal joint 11. Secondly, the sealing rib 23 can also buffer the circumferential and axial tension generated by the universal joint 11 on the metal cover 22 when the shaft moves relative to the outer star wheel.

[0038] In order to improve the tightness of the connection between the sealing rib 23 and the universal joint 11, the sealing rib 23 can be interference fit with the universal joint 11, that is, the sealing rib 23 sleeved on the outside of the universal joint 11 is in a stretched state to increase the friction between the sealing rib 23 and the universal joint 11.

[0039] In some embodiments, the first abutting annular surface is fixedly connected to the inner annular surface of the first end of the metal cover 22. In this embodiment, the sealing rib 23 can be fixedly connected to the inner annular surface of the first end of the metal cover 22 by spinning or vulcanization. At this time, the sealing rib 23 and the metal cover 22 form an integrated structure, which facilitates the assembly between the dustproof component 20 and the universal joint 11, avoids relative movement between the metal cover 22 and the sealing rib 23 during the torsion of the universal joint 11, and improves the structural stability. Of course, the fixed connection between the first abutting annular surface and the inner annular surface of the first end of the metal cover 22 can also be bonding, clamping, injection molding, etc., which is not limited here.

[0040] In other embodiments, the sealing rib 23 may not be fixedly connected to the metal cover 22. When assembling the driving mechanism, the sealing rib 23 may be sleeved outside the outer planetary wheel first, and then the first end of the metal cover 22 may be sleeved outside the outer planetary wheel, and the sealing rib 23 may be clamped between the metal cover 22 and the outer planetary wheel. At this time, an annular rack may also be provided on the second abutting annular surface to improve the tightness of the connection between the sealing rib 23 and the metal cover 22.

[0041] In order to reduce the pulling force of the sealing rib 23 caused by the torsional movement of the universal joint 11, the metal cover 22 can be placed against the outer surface of the universal joint 11 to avoid the tension of the universal joint 11 being entirely applied to the sealing rib 23 due to the gap between the metal cover 22 and the universal joint 11, resulting in cracks at the connection between the metal cover 22 and the sealing rib 23, causing the dustproof component 20 to fail prematurely.

[0042] Optionally, the metal cover 22 can be riveted to the outer surface of the universal joint 11. Specifically, the metal cover 22 includes a cover body 221, a connecting ring 222 connected to the cover body 221, and the connecting ring 222 includes a first connecting section 2221 and a second connecting section 2222 connected in sequence along the axial direction. The first connecting section 2221 is connected to the cover body 221, and the second connecting section 2222 is connected to a side of the first connecting section 2221 away from the cover body 221. The first connecting section 2221 can be riveted to the outer surface of the outer star wheel, and the sealing rib 23 is connected to the inner annular surface of the second connecting section 2222.

[0043] In some embodiments, see Figure 1 The dustproof assembly 20 further includes a clamp 24, which is sleeved outside the first end of the metal cover 22 and is used to clamp the metal cover 22 toward the universal joint. In this way, the reliability of the connection between the metal cover 22 and the universal joint 11 is improved. The clamp 24 can be a single-ear stepless clamp 24, an earless stepless clamp 24 or an integral clamp 24 (MulticrimpClamp, MCR), etc.

[0044] In some embodiments, see Figure 3, the sealing rib 23 is located between the clamp 24 and the universal joint 11. It can be understood that the clamp 24 is clamped on the second connecting section 2222, so that the clamp 24 can further press the sealing rib 23 while clamping the metal cover 22, which not only further increases the contact area between the sealing rib 23 and the universal joint 11, but also increases the radial pressure exerted by the sealing rib 23 on the universal joint 11, thereby further improving the tightness of the connection between the metal cover 22 and the universal joint 11, and preventing the driving mechanism from leaking oil at the connection between the metal cover 22 and the universal joint 11.

[0045] In some embodiments, see Figure 2 and Figure 3 The metal cover 22 is formed with a slot 201 on the outer ring surface of the first end, and the clamp 24 is at least partially accommodated in the slot 201 in the thickness direction. Specifically, the slot 201 is formed on the connecting ring 222, and the connecting ring 222 can be bent to form the slot 201. The width of the clamp 24 can be adapted to the width of the slot 201, or can be interference fit to limit the movement of the clamp 24 relative to the metal cover 22 in the axial direction.

[0046] Optional, see Figure 2 and Figure 3 The slot 201 is formed on the second connecting section 2222, so that the clamp 24 can accurately clamp the sealing rib 23. Since the sealing rib 23 is elastic, the requirement for the matching accuracy of the clamp 24 and the universal joint 11 is reduced.

[0047] In some embodiments, see Figure 2 and Figure 3 The outer surface of the universal joint 11 is provided with a tightening groove 101, which surrounds the universal joint 11, and the sealing rib 23 is at least partially received in the tightening groove 101 in the radial direction. The tightening groove 101 can limit the movement of the sealing rib 23 in the radial direction.

[0048] Optional, see Figure 2 and Figure 3 The tightening groove 101 is adapted or interference fit with the sealing rib 23, thus increasing the contact area between the universal joint 11 and the sealing rib 23, thereby further increasing the friction between the sealing rib 23 and the universal joint 11. At the same time, the sealing path between the sealing rib 23 and the universal joint 11 can be a curved path, so as to further improve the sealing performance between the universal joint 11 and the dustproof assembly 20.

[0049] In some embodiments, see Figure 2 and Figure 3The outer surface of the universal joint 11 is also provided with a rivet point groove 102, which surrounds the universal joint 11 and is spaced apart from the tightening groove 101, and the metal cover 22 is riveted into the rivet point groove 102. The rivet point groove 102 can provide a riveting position for the metal cover 22. At the same time, since the rivet point groove 102 is spaced apart from the tightening groove 101, the protrusion between the rivet point groove 102 and the tightening groove 101 can support the metal cover 22, thereby preventing the metal cover 22 from axially displacing under the tensile force of riveting when the metal cover 22 is riveted. At the same time, when the metal cover 22 is riveted toward the rivet point groove 102, the connecting ring 222 is pressed toward the sealing rib 23 under radial pressure to improve the sealing effect between the sealing rib 23 and the universal joint 11.

[0050] In addition, after the metal cover 22 is riveted into the rivet point groove 102 , the riveted position may be bent toward the inside of the rivet point groove 102 , and the bent area may further limit the axial displacement of the metal cover 22 relative to the universal joint 11 .

[0051] Optional, see Figure 2 and Figure 3 The rivet point groove 102 is located on the side of the tightening groove 101 close to the dust cover 21. In this way, the bending area can form the first layer of sealing between the metal cover 22 and the universal joint 11, thereby reducing the amount of oil flowing to the sealing rib 23, so as to further reduce the risk of oil leakage in the driving mechanism.

[0052] Among them, see Figure 2 The metal cover 22 has a plurality of riveting positions 202 which are arranged at equal intervals around the metal cover 22 so that the metal cover 22 is subjected to uniform circumferential force and has a uniform sealing degree, thereby avoiding oil leakage at a position with lower pressure due to uneven pressure.

[0053] 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 driving mechanism, characterized in that: include: A driving assembly, comprising a universal joint and a shaft connected to the universal joint; A dustproof assembly comprises a dust cover, a metal cover and a sealing rib, wherein the first end of the metal cover is sleeved on the outside of the universal joint, the second end of the metal cover is sealed and connected to the first end of the dust cover, the second end of the dust cover is sleeved on the outside of the shaft, the sealing rib is made of elastic material, the sealing rib is annular and clamped between the metal cover and the universal joint, the sealing rib has a first abutting annular surface abutting the metal cover and a second abutting annular surface abutting the universal joint, and at least the second abutting annular surface is formed with a plurality of annular racks arranged in sequence along the axial direction.

2. The driving mechanism according to claim 1, characterized in that: The first abutting annular surface is fixedly connected to the inner annular surface of the first end of the metal cover.

3. The driving mechanism according to claim 1, characterized in that: The dustproof assembly also includes a clamp, which is sleeved outside the first end of the metal cover and is used to clamp the metal cover toward the universal joint.

4. The driving mechanism according to claim 3, characterized in that: The metal cover is formed with a clamping groove on the outer ring surface of the first end, and the clamp is at least partially accommodated in the clamping groove in the thickness direction.

5. The driving mechanism according to claim 4, characterized in that: The sealing rib is located between the clamp and the universal joint.

6. The driving mechanism according to claim 1, characterized in that: A tightening groove is formed on the outer surface of the universal joint, and the tightening groove surrounds the universal joint. The sealing rib is at least partially received in the tightening groove in the radial direction.

7. The driving mechanism according to claim 6, characterized in that: The outer surface of the universal joint is also provided with a rivet point groove, which surrounds the universal joint and is spaced apart from the tightening groove, and the metal cover is riveted into the rivet point groove.

8. The driving mechanism according to claim 7, characterized in that: The metal cover is provided with a plurality of riveting positions, and the plurality of riveting positions are arranged at equal intervals around the metal cover.

9. The driving mechanism according to claim 7, characterized in that: The rivet point groove is located on a side of the fastening groove close to the dust cover.

10. A vehicle, characterized in that: Comprising a driving mechanism as claimed in any one of claims 1 to 9.

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