Drive shaft assembly, drive assembly and vehicle

Abstract

The utility model discloses a kind of drive shaft assembly, drive assembly and vehicle, it is related to vehicle manufacturing technical field, drive shaft assembly includes: drive shaft, drive shaft includes the fixed shaft portion and drive shaft portion being connected along axial direction, drive shaft portion is suitable for being arranged in wheel hub structure and with wheel hub structure transmission cooperation, the outer diameter of fixed shaft portion is greater than the outer diameter of drive shaft portion, to form with the end face of cooperation at the end of fixed shaft portion towards drive shaft portion;Anti-rattling structure, anti-rattling structure includes rolling element and anti-rattling cover, anti-rattling cover is rotatably connected in end face, rolling element is installed at end face and with anti-rattling cover rolling cooperation, anti-rattling cover is suitable for with the end face of wheel hub structure and press-fit cooperation.The drive shaft assembly of the utility model, anti-rattling structure is installed in drive shaft, sliding friction between fixed shaft portion and wheel hub structure can be converted into rolling friction, to reduce the abnormal sound emitted by vehicle, and simple structure, easy to install, easily replace, relatively low in cost.

Description

Technical Field

[0001] This utility model relates to the field of vehicle manufacturing technology, and in particular to a drive shaft assembly, a drive assembly having the drive shaft assembly, and a vehicle having the drive assembly. Background Technology

[0002] In the modern automotive industry, abnormal noises often occur at the contact point between the drive shaft and the wheel hub bearing end face when a car starts and reverses. Related technologies generally employ a drive shaft spline with a helical structure and add a friction-reducing structure to the fixed end face of the drive shaft to reduce noise. However, traditional friction-reducing structures require the installation of friction-reducing shims or the application of friction-reducing coatings, which is a complex and costly process. Furthermore, the friction-reducing coating is prone to peeling off during assembly, transportation, and in humid environments, thus losing its noise-reducing effect, indicating room for improvement. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a drive shaft assembly that can reduce abnormal noises from vehicles, and is simple in structure, easy to install, easy to replace, and low in cost.

[0004] A drive shaft assembly according to an embodiment of the present invention includes: a drive shaft, the drive shaft including a fixed shaft portion and a drive shaft portion connected axially, the drive shaft portion passing through a hub structure and engaging with the hub structure in a transmission manner, the outer diameter of the fixed shaft portion being larger than the outer diameter of the drive shaft portion, such that a mating end face is formed at one end of the fixed shaft portion facing the drive shaft portion; and an anti-noise structure, the anti-noise structure including a rolling element and an anti-noise cover plate, the anti-noise cover plate being rotatably connected to the mating end face, the rolling element being mounted at the mating end face and engaging with the anti-noise cover plate in a rolling manner, and the anti-noise cover plate engaging with the end face of the hub structure in a pressing manner.

[0005] According to the drive shaft assembly of this utility model embodiment, the installation of an anti-noise structure on the drive shaft can convert the sliding friction between the fixed shaft and the wheel hub structure into rolling friction, thereby reducing the generation of vehicle noise. Moreover, the structure is simple, easy to install, easy to replace, and low in cost.

[0006] According to some embodiments of the present invention, the drive shaft assembly has a rolling mounting groove on the mating end face, the rolling element is rotatably mounted in the rolling mounting groove, and at least a portion of the rolling element extends out of the rolling mounting groove to make rolling contact with the noise-reducing cover.

[0007] According to some embodiments of the present invention, in the drive shaft assembly, there are multiple rolling mounting grooves and multiple rolling elements, with each rolling element correspondingly mounted in one of the multiple rolling mounting grooves, and the multiple rolling mounting grooves are distributed around the center of the mating end face.

[0008] According to some embodiments of the present invention, in the drive shaft assembly, the rolling mounting groove is constructed as an elongated groove, the rolling element is constructed as a cylindrical roller, and the cylindrical roller is installed in the elongated groove and has a clearance fit with the inner wall of the elongated groove.

[0009] According to some embodiments of the present utility model, in the drive shaft assembly, the anti-noise cover is provided with a first anti-detachment part, the fixed shaft part is provided with a first anti-detachment mating part, and the first anti-detachment part and the first anti-detachment mating part are limited to fit along the axial direction of the fixed shaft part;

[0010] And / or, the noise-proof cover is provided with a second anti-detachment part, the drive shaft part is provided with a second anti-detachment mating part, and the second anti-detachment part and the second anti-detachment mating part are limited and fitted along the axial direction of the drive shaft part.

[0011] According to some embodiments of the present invention, in the drive shaft assembly, one of the first anti-detachment portion and the first anti-detachment mating portion is configured as a first anti-detachment protrusion and the other is configured as a first anti-detachment groove. The first anti-detachment protrusion and the first anti-detachment groove are radially inserted into the fixed shaft portion to limit the fit along the axial direction.

[0012] And / or, one of the second anti-detachment portion and the second anti-detachment mating portion is configured as a second anti-detachment protrusion and the other is configured as a second anti-detachment groove, the second anti-detachment protrusion and the second anti-detachment groove being inserted radially along the drive shaft portion to achieve axial limiting fit.

[0013] According to some embodiments of the present invention, the drive shaft assembly has a limiting flange along the outer periphery of the noise-proof cover plate. The limiting flange protrudes and extends toward the fixed shaft portion. At least a portion of the limiting flange is sleeved on the outer side of the fixed shaft portion. The first anti-detachment portion is disposed on the inner side of the limiting flange, and the first anti-detachment mating portion is disposed on the outer peripheral wall of the fixed shaft portion.

[0014] According to some embodiments of the present invention, in the drive shaft assembly, the noise-proof cover plate has a clearance hole for the drive shaft portion to pass through, the inner periphery of the clearance hole is provided with a second anti-detachment portion, and the outer peripheral wall of the drive shaft portion has a second anti-detachment mating portion.

[0015] This utility model also proposes a drive assembly.

[0016] The drive assembly according to an embodiment of the present utility model includes a hub structure and a drive shaft assembly as described in any of the above embodiments. The hub structure includes a hub body and a hub bearing. The drive shaft is inserted into the hub body and is circumferentially driven by the hub body. The hub bearing is installed outside the hub body, and the end face of the hub bearing abuts against the noise-reducing cover.

[0017] This utility model also proposes a vehicle.

[0018] The vehicle according to the present invention includes the drive assembly of any of the above embodiments.

[0019] The vehicle and the drive assembly have the same advantages over the prior art as the aforementioned drive shaft assembly, and will not be repeated here.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of the drive shaft assembly according to an embodiment of the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the drive shaft assembly according to an embodiment of the present invention. Figure 2 ;

[0024] Figure 3 This is a schematic diagram of the structure of the rolling element according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the noise-reducing cover plate according to an embodiment of this utility model;

[0026] Figure 5 This is a cross-sectional view of the noise-reducing cover plate according to an embodiment of this utility model;

[0027] Figure 6 This is a schematic diagram of the drive assembly according to an embodiment of the present utility model;

[0028] Figure 7 This is a cross-sectional view of the first anti-detachment part and the limiting flange of this utility model embodiment;

[0029] Figure 8 This is a schematic diagram of the hub structure and the noise-reducing cover plate of this utility model embodiment.

[0030] Figure label:

[0031] Drive shaft assembly 100,

[0032] Drive shaft 1, fixed shaft portion 11, first anti-detachment mating portion 111, drive shaft portion 12, second anti-detachment mating portion 121, mating end face 13, rolling mounting groove 131.

[0033] Noise-proof structure 2, rolling element 21, noise-proof cover 22, first anti-detachment part 221, second anti-detachment part 222, limiting flange 223, clearance hole 224.

[0034] Wheel hub structure 200, wheel hub body 2001, wheel hub bearing 2002.

[0035] Drive assembly 300. Detailed Implementation

[0036] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0037] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] The following is for reference. Figures 1-8The drive shaft assembly 100 according to the present utility model embodiment describes that by installing an anti-noise structure 2 on the drive shaft 1, the anti-noise structure 2 can play a buffering and vibration reduction effect between the wheel hub structure 200 and the mating end face 13 of the drive shaft 1, thereby reducing the abnormal noise emitted by the vehicle. Moreover, the structure is simple, easy to install, easy to replace, and low in cost.

[0040] like Figure 1 and Figure 2 As shown, the drive shaft assembly 100 according to an embodiment of the present invention includes: a drive shaft 1 and an anti-noise structure 2.

[0041] The drive shaft 1 is a key component in the vehicle's transmission system, transmitting power from the drive motor to the wheels, thereby driving the wheels to rotate and propelling the vehicle. The drive shaft 1 includes a fixed shaft portion 11 and a drive shaft portion 12 connected axially. The fixed shaft portion 11 provides support and positioning for the drive shaft 1, meaning it can be fixedly installed to the vehicle body to ensure the stability of the drive shaft 1 during operation and prevent displacement under external forces such as vibration and impact. The drive shaft portion 12 is a rotating component involved in power transmission, directly transmitting the rotational power of the drive motor to the wheels to drive their rotation. Thus, through the cooperation of the drive shaft portion 12 and the fixed shaft portion 11, the drive shaft 1 can transmit power smoothly and efficiently.

[0042] The wheel hub structure 200 is the core component connecting the wheel and the vehicle drive system, supporting the wheel, transmitting power, and ensuring the smooth rotation of the wheel. The drive shaft 12 passes through the wheel hub structure 200 and is in a transmission engagement with it. That is, the drive shaft 1 and the wheel hub structure 200 can be plugged into each other to achieve mutual connection. Furthermore, the drive shaft 1 and the wheel hub structure 200 can form a circumferential transmission engagement at the connection point. Thus, when the drive shaft 1 rotates, it drives the wheel hub structure 200 to rotate synchronously, thereby transmitting the rotational power of the drive motor to the wheel hub structure 200, causing the wheel hub structure 200 to rotate, and ultimately driving the wheel to rotate.

[0043] The outer diameter of the fixed shaft portion 11 is larger than the outer diameter of the drive shaft portion 12, so that a mating end face 13 is formed at the end of the fixed shaft portion 11 facing the drive shaft portion 12; that is, the end face at the connection between the fixed shaft portion 11 and the drive shaft portion 12 is the mating end face 13, that is, one end of the drive shaft portion 12 is connected to the mating end face 13, and the anti-noise structure 2 is installed on the fixed shaft portion 11 at the mating end face 13, so that the anti-noise structure 2 reduces the abnormal noise generated by the vehicle at the connection between the drive shaft 1 and the wheel hub structure 200.

[0044] The noise reduction structure 2 includes a rolling element 21 and a noise reduction cover 22. The noise reduction cover 22 is rotatably connected to the mating end face 13. That is, the noise reduction cover 22 can be installed at the end of the fixed shaft portion 11 that is close to the drive shaft portion 12. Furthermore, the noise reduction cover 22 can rotate after being installed on the mating end face 13, thus facilitating its installation on the fixed shaft portion 11 and making it easy to replace. Specifically, after the noise reduction structure 2 is installed on the mating end face 13 of the fixed shaft portion 11, the noise reduction cover 22 is located between the hub structure 200 and the mating end face 13. During the rotation of the hub structure 200 driven by the drive shaft 1, the noise reduction cover 22 can separate the contact area between the mating end face 13 and the hub structure 200, preventing direct contact between the hub structure 200 and the mating end face 13 from generating frictional noise.

[0045] Furthermore, the rolling element 21 is installed at the mating end face 13, and the rolling element 21 rolls in contact with the anti-noise cover 22, that is, the anti-noise cover 22 presses against the fixed shaft portion 11 through the rolling element 21. In actual transmission, when the hub structure 200 moves closer to the mating end face 13, the hub structure 200 presses against the anti-noise cover 22 and is spaced apart from the mating end face 13. As the hub structure 200 rotates, the anti-noise cover 22 rotates relative to the mating end face 13 under the driving action of the hub structure 200. When the anti-noise cover 22 rotates, it drives the rolling element 21 to roll.

[0046] In other words, by setting the anti-noise structure 2, the sliding contact between the hub structure 200 and the mating end face 13 can be converted into rolling friction between the anti-noise cover 22 and the mating end face 13 through the rolling element 21. This reduces the friction between the fixed shaft portion 11 and the hub structure 200, thereby reducing the generated noise. The anti-noise cover 22 can be made of a flexible material so that the anti-noise cover 22 and the end face of the hub structure 200 have flexible contact, reducing contact noise between the anti-noise cover 22 and the hub structure 200.

[0047] In actual installation, the drive shaft 12 of the drive shaft 1 can rotate and drive the hub structure 200 to rotate synchronously. One side of the anti-noise cover 22 is in rolling contact with the mating end face 13 of the fixed shaft 11 through the rolling element 21, and the other side is in mutual pressure with the end face of the hub structure 200. Thus, when the drive shaft 12 drives the hub structure 200 to rotate, the fixed shaft 11 remains stationary, that is, the hub structure 200 and the fixed shaft 11 undergo relative displacement in the circumferential direction. The hub structure 200 drives the anti-noise cover 22 to rotate synchronously through sliding friction, that is, the anti-noise cover 22 is rotated synchronously. The noise-inducing cover 22 will generate circumferential displacement relative to the fixed end face. At the same time, the rolling element 21 that rolls with the noise-inducing cover 22 will roll. Thus, the rolling element 21 can convert the sliding friction between the noise-inducing cover 22 and the mating end face 13 into rolling friction. That is, the friction between the fixed shaft part 11 and the end face of the hub structure 200 is rolling friction, thereby reducing the friction between the drive shaft 1 and the hub structure 200, thereby reducing the generation of noise. Moreover, the frictional force of rolling friction is smaller, which is beneficial to the rotation of the hub structure 200 and extends the service life of the structure.

[0048] According to the embodiment of the present utility model, the drive shaft assembly 100 is provided with an anti-noise structure 2, which allows the drive shaft 1 and the anti-noise structure 2 to cooperate with each other, thereby converting the sliding friction between the fixed shaft part 11 and the hub structure 200 into rolling friction, thereby reducing the generated noise. The structure is simple, easy to install, easy to replace, and low in cost.

[0049] In some embodiments, the mating end face 13 is provided with a rolling mounting groove 131, and the rolling element 21 is rolled and mounted in the rolling mounting groove 131. That is, the rolling mounting groove 131 can accommodate the rolling element 21 and allow the rolling element 21 to be movably mounted in the rolling mounting groove 131. In other words, the mating end face 13 uses the rolling mounting groove 131 to position the rolling element 21 at the desired location. Also, at least a portion of the rolling element 21 extends out of the rolling mounting groove 131 to roll and contact the anti-noise cover 22. That is, the outer diameter of the rolling element 21 is greater than the depth of the rolling mounting groove 131, so that when the rolling element 21 is mounted in the rolling mounting groove 131, a portion of the outer peripheral wall of the rolling element 21 extends out of the rolling mounting groove 131 and rolls and engages with the anti-noise cover 22.

[0050] Specifically, such as Figure 2As shown, the mating end face 13 is provided with an inwardly recessed rolling mounting groove 131. During actual installation, the rolling element 21 can be pressed against the rolling mounting groove 131, and then the anti-noise cover 22 is connected to the mating end face 13. In this way, the rolling element 21 is located between the mating end face 13 and the anti-noise cover 22, and the rolling element 21 presses against the anti-noise cover 22. While the anti-noise cover 22 is pressing against the rolling element 21, it does not contact the mating end face 13. Therefore, only rolling friction occurs between the anti-noise cover 22 and the mating end face 13, which is beneficial to the rotation of the wheel and reduces the generation of abnormal noise.

[0051] Therefore, by providing a rolling mounting groove 131 on the mating end face 13, the inner wall of the rolling mounting groove 131 is used to limit the installation of the rolling element 21, ensuring that the rolling element 21 can roll in a fixed position, preventing the rolling element 21 from moving between the fixed shaft part 11 and the anti-noise cover plate 22, and ensuring the reliability of the rolling support of the rolling element 21.

[0052] In some embodiments, there are multiple rolling mounting grooves 131 and multiple rolling elements 21, with each rolling element 21 corresponding to one of the multiple rolling mounting grooves 131. That is, there can be two, three, or more rolling mounting grooves 131, and there can be two, three, or more rolling elements 21. The number of rolling mounting grooves 131 and the number of rolling elements 21 are the same, that is, each rolling element 21 has a corresponding rolling mounting groove 131. Thus, each rolling element 21 can be installed into its corresponding rolling mounting groove 131, and each rolling mounting groove 131 has one rolling element 21 installed. This allows rolling friction between the mating end face 13 and the anti-noise cover 22 through multiple rolling elements 21, further reducing friction and noise.

[0053] Meanwhile, multiple rolling elements 21 extend at least to press against the noise-reducing cover 22, thereby minimizing contact between the noise-reducing cover 22 and the mating end face 13, and thus preventing sliding friction. Furthermore, multiple rolling mounting grooves 131 are distributed around the center of the mating end face 13, meaning the rolling mounting grooves 131 are evenly distributed circumferentially along the mating end face 13. This means the rolling mounting grooves 131 are evenly spaced circumferentially. Therefore, when the rolling elements 21 and the noise-reducing cover 22 are in rolling contact, the rolling elements 21 can cause the noise-reducing cover 22 to experience evenly distributed rolling friction in the circumferential direction, thereby facilitating the rotation of the noise-reducing cover 22 and reducing noise generation.

[0054] Specifically, such as Figure 2As shown, the mating end face 13 has 18 rolling mounting grooves 131, which are evenly distributed circumferentially along the mating end face 13. Simultaneously, 18 rolling elements 21 are installed into the rolling mounting grooves 131, with only one rolling element 21 installed in each groove 131. That is, the 18 rolling elements 21 can be evenly distributed circumferentially along the mating end face 13. When the hub structure 200 drives the anti-noise cover 22 to rotate, all 18 rolling elements 21 that are pressing against the anti-noise cover 22 roll, forming multi-point rolling support between the anti-noise cover 22 and the mating end face 13. This facilitates the rotation of the anti-noise cover 22 and reduces the generation of abnormal noise.

[0055] In some embodiments, the rolling mounting groove 131 is constructed as an elongated groove, and the rolling element 21 is constructed as a cylindrical roller. By designing the rolling element 21 as a cylindrical roller, the load generated when it presses against the noise-reducing cover 22 can be evenly distributed on the contact surface. This means the rolling element 21 ensures that the noise-reducing cover 22 is subjected to uniform force, thereby reducing stress concentration and preventing premature wear or deformation of the noise-reducing cover 22. This avoids the increased costs associated with frequent replacements of the noise-reducing cover 22. Furthermore, the cylindrical shape facilitates manufacturing and processing, ensuring the machining accuracy of the rolling element 21, guaranteeing dimensional consistency and surface finish for each rolling element 21. This allows each rolling element 21 to function smoothly, improving structural stability. Additionally, the cylindrical rollers are easy to produce and replace, thus reducing maintenance costs.

[0056] Among them, such as Figure 2 As shown, the cylindrical roller is installed in the elongated groove, and the cylindrical roller is clearance-fitted with the inner wall of the elongated groove. That is to say, the cylindrical roller can roll in the elongated groove, that is, the rolling element 21 can roll in the rolling mounting groove 131. Thus, the rolling element 21 and the anti-noise cover 22 can achieve a rolling fit, and the sliding friction between the anti-noise cover 22 and the mating end face 13 is converted into rolling friction, which helps to reduce the generation of abnormal noise.

[0057] In some embodiments, the noise-reducing cover 22 is provided with a first anti-detachment part 221, and the fixed shaft part 11 is provided with a first anti-detachment mating part 111. The first anti-detachment part 221 and the first anti-detachment mating part 111 are mutually limited and fitted along the axial direction of the fixed shaft part 11. That is, the first anti-detachment part 221 and the first anti-detachment mating part 111 can be fixed in the axial direction, that is, the noise-reducing cover 22 and the fixed shaft part 11 can be relatively fixed in the axial direction, so that the noise-reducing cover 22 is connected to the mating end. Thus, the noise-reducing cover 22 and the rolling element 21 can be prevented from detaching from the mating end face 13, thereby ensuring the structural stability of the noise-reducing structure 2.

[0058] And / or, in other embodiments, the noise-reducing cover 22 is provided with a second anti-detachment portion 222, and the drive shaft portion 12 is provided with a second anti-detachment mating portion 121. The second anti-detachment portion 222 and the second anti-detachment mating portion 121 are axially limited and engaged. That is, the second anti-detachment portion 222 and the second anti-detachment mating portion 121 can be relatively fixed in the axial direction, so that the noise-reducing cover 22 is connected to the mating end face 13 so that the rolling element 21 is fixedly limited in the rolling mounting groove 131, thereby ensuring the structural effectiveness of the noise-reducing structure 2.

[0059] Specifically, such as Figure 2 , Figure 4 , Figure 5 and Figure 7 As shown, the outer periphery of the noise-reducing cover 22 is provided with a first anti-detachment part 221, and the inner periphery is provided with a second anti-detachment part 222. The fixed shaft part 11 is provided with a first anti-detachment mating part 111 corresponding to the first anti-detachment part 221, and the drive shaft part 12 is provided with a second anti-detachment mating part 121 that mates with the second anti-detachment part 222. The first anti-detachment mating part 111 and the second anti-detachment mating part 121 are in the same cross section. In actual installation, the noise-reducing cover 22 can be gradually moved closer to the drive shaft 1 and pressed against the fixed shaft part 11. Thus, the first anti-detachment part 221 and the first anti-detachment mating part 111 achieve a limiting fit in the axial direction. At the same time, the second anti-detachment part 222 and the second anti-detachment mating part 121 achieve a limiting fit in the axial direction. Through the axial limiting fit at both locations, the noise-reducing cover 22 can be fixedly connected to the mating end face 13 with high connection strength and facilitate assembly of the structure.

[0060] In some embodiments, one of the first anti-detachment portion 221 and the first anti-detachment mating portion 111 is configured as a first anti-detachment protrusion and the other is configured as a first anti-detachment groove. That is, the first anti-detachment portion 221 can be configured as a first anti-detachment protrusion and the first anti-detachment mating portion 111 can be configured as a first anti-detachment groove, or the first anti-detachment portion 221 can be configured as a first anti-detachment groove and the first anti-detachment mating portion 111 can be configured as a first anti-detachment protrusion, both of which can achieve mutual mating between the first anti-detachment portion 221 and the first anti-detachment mating portion 111; and the first anti-detachment protrusion and the first anti-detachment groove are inserted radially along the fixed shaft portion 11 to achieve axial limiting mating, thereby, the noise-reducing cover 22 can be fixedly connected to the mating end face 13 through the limiting mating mating of the first anti-detachment portion 221 and the first anti-detachment mating portion 111.

[0061] And / or, in other embodiments, one of the second anti-detachment portion 222 and the second anti-detachment mating portion 121 is configured as a second anti-detachment protrusion and the other is configured as a second anti-detachment groove. That is, the second anti-detachment portion 222 can be configured as a second anti-detachment protrusion and the second anti-detachment mating portion 121 can be configured as a second anti-detachment groove, or the second anti-detachment portion 222 can be configured as a second anti-detachment groove and the second anti-detachment mating portion 121 can be configured as a second anti-detachment protrusion, both of which can achieve mutual mating between the second anti-detachment portion 222 and the second anti-detachment mating portion 121; and the second anti-detachment protrusion and the second anti-detachment groove are inserted radially along the drive shaft portion 12 to achieve axial limiting mating, thereby, the limiting mating between the second anti-detachment portion 222 and the second anti-detachment mating portion 121 can achieve the fixed connection of the anti-noise cover 22 to the mating end face 13.

[0062] Specifically, such as Figure 2 , Figure 5 and Figure 7 As shown, the noise-reducing cover 22 is provided with a first anti-detachment part 221 and a second anti-detachment part 222, the fixed shaft part 11 is provided with a first anti-detachment mating part 111, and the drive shaft part 12 is provided with a second anti-detachment mating part 121. The first anti-detachment part 221 and the second anti-detachment part 222 are constructed as a first anti-detachment protrusion and a second anti-detachment protrusion, and the first anti-detachment mating part 111 and the second anti-detachment mating part 121 are constructed as a first anti-detachment groove and a second anti-detachment groove. In actual installation, the first anti-detachment protrusion extends radially into the first anti-detachment groove, and the second anti-detachment protrusion extends radially into the second anti-detachment groove. Thus, the axial limiting fit between the noise-reducing cover 22 and the mating end face 13 is realized, thereby fixing the rolling element 21 in the rolling mounting groove 131, which is beneficial for assembly and reduces the generation of noise.

[0063] In some embodiments, the outer periphery of the noise-reducing cover 22 is provided with a limiting flange 223, which protrudes toward the fixed shaft portion 11. At least a portion of the limiting flange 223 is sleeved on the outside of the fixed shaft portion 11. That is, the noise-reducing cover 22 can be fastened to the fixed shaft portion 11, and the limiting flange 223 can abut against the outer peripheral wall of the fixed shaft portion 11. Thus, a radial limiting fit can be achieved between the noise-reducing cover 22 and the fixed shaft portion 11, avoiding radial relative displacement between the noise-reducing cover 22 and the fixed shaft portion 11, facilitating rolling fit with the rolling element 21, and ensuring the structural effectiveness of the noise-reducing structure 2. Furthermore, the first anti-detachment part 221 is provided on the inner side of the limiting flange 223, and the first anti-detachment mating part 111 is provided on the outer peripheral wall of the fixed shaft part 11. Thus, through the cooperation of the first anti-detachment part 221 and the first anti-detachment mating part 111, the limiting flange 223 and the fixed shaft part 11 can achieve axial limiting cooperation.

[0064] Specifically, such as Figure 2As shown, the noise-reducing cover 22 can approach each other axially with the fixed shaft portion 11, and the limiting flange 223 is fastened to the fixed shaft portion 11. The first anti-detachment portion 221 on the inner side of the limiting flange 223 and the first anti-detachment mating portion 111 on the fixed shaft portion 11 are inserted into each other, thereby fixing the noise-reducing cover 22 and the fixed shaft portion 11 relative to each other. This fixes the rolling element 21 in the rolling mounting groove 131 so as to achieve rolling mating with the noise-reducing cover 22 and reduce the generation of noise.

[0065] In some embodiments, the noise-reducing cover 22 is formed with a clearance hole 224 for the drive shaft portion 12 to pass through. That is, the noise-reducing cover 22 presses against the mating end face 13 by allowing the drive shaft portion 12 to pass through the clearance hole 224, thereby achieving connection and fixation with the mating end face 13. Furthermore, a second anti-detachment portion 222 is provided along the inner periphery of the clearance hole 224, and a second anti-detachment mating portion 121 is formed on the outer peripheral wall of the drive shaft portion 12. The second anti-detachment portion 222 and the second anti-detachment mating portion 121 can cooperate with each other to achieve axial limiting fixation, thereby connecting and fixing the noise-reducing cover 22 to the drive shaft 1 at the inner periphery of the clearance hole 224, that is, the noise-reducing cover 22 is limited and fixed on the mating end face 13 of the fixed shaft portion 11.

[0066] Specifically, such as Figure 2 , Figure 5 and Figure 7 As shown, the second anti-detachment part 222 can be configured as a second anti-detachment protrusion, and the second anti-detachment mating part 121 can be configured as a second anti-detachment groove. In actual installation, the drive shaft part 12 can be aligned with the clearance hole 224, and the noise-reducing cover 22 can be gradually moved closer to the fixed shaft part 11. The drive shaft part 12 can pass through the clearance hole 224, and as the noise-reducing cover 22 and the fixed shaft part 11 press against each other, the second anti-detachment part 222 on the periphery of the clearance hole 224 extends radially into the second anti-detachment mating part 121, that is, the second anti-detachment protrusion and the second anti-detachment groove form an insertion fit, thereby fixing the noise-reducing cover 22 and the fixed shaft part 11 in the axial upper limit. Thus, the noise-reducing cover 22 is connected to the mating end face 13, which facilitates the fixed installation of the rolling element 21 in the rolling mounting groove 131, and helps to reduce the generation of abnormal noise.

[0067] This utility model also proposes a drive assembly 300.

[0068] The drive assembly 300 according to an embodiment of the present invention includes the drive shaft assembly 100 of any of the above embodiments. Specifically, as shown... Figure 6 and Figure 8As shown, the wheel hub structure 200 includes a wheel hub body 2001 and a wheel hub bearing 2002. The drive shaft 12 passes through the wheel hub body 2001 and is circumferentially driven by the wheel hub body 2001. Thus, the rotation of the drive shaft 12 can drive the rotation of the wheel hub body 2001, and in turn drive the rotation of the wheel. The wheel hub bearing 2002 is installed outside the wheel hub body 2001, and the end face of the wheel hub bearing 2002 presses against the anti-noise cover 22. Thus, the wheel hub bearing 2002 can drive the anti-noise cover 22 to rotate through sliding friction, so that the anti-noise cover 22 and the rolling element 21 can roll together, thereby reducing the generation of abnormal noise.

[0069] This utility model also proposes a vehicle.

[0070] The vehicle according to the present invention includes a drive assembly 300 of any of the above embodiments. By providing an anti-noise structure 2, the drive shaft 1 and the anti-noise structure 2 cooperate with each other, thereby converting the sliding friction between the fixed shaft portion 11 and the wheel hub structure 200 into rolling friction, thus reducing the generated noise. Furthermore, the structure is simple, easy to install, easy to replace, and has a low cost.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0072] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A drive shaft assembly, characterized in that, include: A drive shaft (1) includes a fixed shaft portion (11) and a drive shaft portion (12) connected axially. The drive shaft portion (12) passes through a hub structure (200) and is in transmission cooperation with the hub structure (200). The outer diameter of the fixed shaft portion (11) is larger than the outer diameter of the drive shaft portion (12) so that a mating end face (13) is formed at one end of the fixed shaft portion (11) facing the drive shaft portion (12). The noise-proof structure (2) includes a rolling element (21) and a noise-proof cover plate (22). The noise-proof cover plate (22) is rotatably connected to the mating end face (13). The rolling element (21) is installed at the mating end face (13) and rolls with the noise-proof cover plate (22). The noise-proof cover plate (22) presses against the end face of the wheel hub structure (200).

2. The drive shaft assembly according to claim 1, characterized in that, The mating end face (13) is provided with a rolling mounting groove (131), the rolling element (21) is rolled in the rolling mounting groove (131), and at least a portion of the rolling element (21) extends out from the rolling mounting groove (131) to roll into contact with the noise-proof cover plate (22).

3. The drive shaft assembly according to claim 2, characterized in that, There are multiple rolling mounting grooves (131) and multiple rolling elements (21). The multiple rolling elements (21) are installed in the multiple rolling mounting grooves (131) in a one-to-one correspondence, and the multiple rolling mounting grooves (131) are distributed around the center of the mating end face (13).

4. The drive shaft assembly according to claim 2, characterized in that, The rolling mounting groove (131) is constructed as an elongated groove, and the rolling element (21) is constructed as a cylindrical roller. The cylindrical roller is installed in the elongated groove and has a clearance fit with the inner wall of the elongated groove.

5. The drive shaft assembly according to claim 1, characterized in that, The noise-proof cover (22) is provided with a first anti-detachment part (221), and the fixed shaft part (11) is provided with a first anti-detachment mating part (111). The first anti-detachment part (221) and the first anti-detachment mating part (111) are limited and fitted along the axial direction of the fixed shaft part (11). And / or, the noise-proof cover (22) is provided with a second anti-detachment part (222), the drive shaft part (12) is provided with a second anti-detachment mating part (121), and the second anti-detachment part (222) and the second anti-detachment mating part (121) are limited to fit along the axial direction of the drive shaft part (12).

6. The drive shaft assembly according to claim 5, characterized in that, One of the first anti-detachment part (221) and the first anti-detachment mating part (111) has a first anti-detachment protrusion and the other has a first anti-detachment groove. The first anti-detachment protrusion and the first anti-detachment groove are inserted into the radial part of the fixed shaft part (11) to limit the fit along the axial direction. And / or, one of the second anti-detachment part (222) and the second anti-detachment mating part (121) is configured as a second anti-detachment protrusion and the other is configured as a second anti-detachment groove, the second anti-detachment protrusion and the second anti-detachment groove are inserted radially along the drive shaft part (12) to limit the engagement along the axial direction.

7. The drive shaft assembly according to claim 5, characterized in that, The outer periphery of the noise-proof cover plate (22) is provided with a limiting flange (223), the limiting flange (223) protrudes and extends toward the fixed shaft part (11), at least part of the limiting flange (223) is sleeved on the outside of the fixed shaft part (11), the first anti-detachment part (221) is provided on the inside of the limiting flange (223), and the first anti-detachment mating part (111) is provided on the outer peripheral wall of the fixed shaft part (11).

8. The drive shaft assembly according to claim 5, characterized in that, The noise-proof cover plate (22) has a clearance hole (224) for the drive shaft part (12) to pass through. The inner periphery of the clearance hole (224) is provided with a second anti-detachment part (222), and the outer peripheral wall of the drive shaft part (12) is provided with a second anti-detachment mating part (121).

9. A drive assembly (300), characterized in that, The device includes a hub structure (200) and a drive shaft assembly according to any one of claims 1-8. The hub structure (200) includes a hub body (2001) and a hub bearing (2002). The drive shaft portion (12) passes through the hub body (2001) and is circumferentially driven in cooperation with the hub body (2001). The hub bearing (2002) is installed outside the hub body (2001), and the end face of the hub bearing (2002) presses against the noise-reducing cover plate (22).

10. A vehicle, characterized in that, Includes the drive assembly (300) as described in claim 9.

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