Driving shaft assembly and vehicle

Abstract

The utility model provides a driving shaft assembly and a vehicle, and relates to the technical field of automobiles, the driving shaft assembly comprises a walking wheel assembly and a ball cage, the walking wheel assembly comprises a hub bearing, and the hub bearing is constructed to be arranged in a walking wheel; the ball cage comprises a bell-shaped shell and an anti-attrition part, the bell-shaped shell comprises a bell-shaped shell body and a driving shaft connected to the outer end of the bell-shaped shell body, the driving shaft penetrates through the hub bearing to be connected with the walking wheel, a limiting structure is arranged on the peripheral wall of the driving shaft, and the anti-attrition part is arranged between the limiting structure and the outer end face of the bell-shaped shell body. Therefore, the hub bearing is prevented from being in contact with the bell housing body. According to the driving shaft assembly and the vehicle provided by the utility model, the anti-attrition piece is fixed firmly and is not easy to fall off.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a drive shaft assembly and a vehicle. Background Art

[0002] The drive shaft is a key component of a car, mainly used to transmit power to the car. Usually the drive shaft is connected to the wheel hub bearing with a spline. When the car starts, in order to eliminate the spline clearance, a slight misalignment will occur, resulting in abnormal noise.

[0003] In order to solve the abnormal friction noise between the end face of the drive shaft and the end face of the wheel hub bearing when the vehicle starts, the common technical means at present is to put a layer of wear-reducing parts between the wheel hub bearing and the drive shaft. When installing the wear-reducing parts, it is necessary to first wipe off the anti-rust oil on the end face of the drive shaft, then apply glue, and keep a certain pressure on the wear-reducing parts. After the glue is dry, the wear-reducing parts can be adhered to the end face of the fixed section of the drive shaft.

[0004] However, this traditional drive shaft structure makes the wear-reducing component not firmly fixed and easily fall off. Utility Model Content

[0005] The embodiments of the present application provide a drive shaft assembly and a vehicle, so that the wear-reducing component is firmly fixed and not easy to fall off.

[0006] In the first aspect, the utility model provides a drive shaft assembly, including a traveling wheel assembly and a ball cage, the traveling wheel assembly including a wheel hub bearing, the wheel hub bearing being constructed to be arranged inside the traveling wheel; the ball cage including a bell-shaped shell and a wear-reducing part, the bell-shaped shell including a bell-shaped shell body and a drive shaft connected to the outer end of the bell-shaped shell body, the drive shaft passing through the wheel hub bearing to be connected to the traveling wheel, and a limiting structure is provided on the outer peripheral wall of the drive shaft, the wear-reducing part is arranged between the limiting structure and the outer end face of the bell-shaped shell body, and a gap is provided to avoid contact between the wheel hub bearing and the outer end face of the bell-shaped shell body.

[0007] As in the above-mentioned drive shaft assembly, optionally, the wear reducing member has a center hole, the drive shaft passes through the center hole, and the limiting structure surrounds the circumferential outer side of the drive shaft.

[0008] As for the drive shaft assembly as mentioned above, optionally, the limiting structure includes a limiting boss, a mounting groove is formed between the limiting boss and the outer end surface of the bell housing body, and the wear reducing member is clamped in the mounting groove.

[0009] As in the drive shaft assembly described above, optionally, the limiting boss is formed on the circumferential side wall of the drive shaft.

[0010] As for the drive shaft assembly as mentioned above, optionally, the side of the limiting boss facing the hub bearing is a guiding inclined surface inclined relative to the drive shaft, and the side of the limiting boss facing the bell housing body is a limiting end surface.

[0011] As for the drive shaft assembly as mentioned above, optionally, the limiting structure includes an elastic retaining ring, which surrounds the outside of the drive shaft and is disposed on a side of the outer end surface of the wear reducing member that is away from the bell housing body.

[0012] As in the above-mentioned drive shaft assembly, optionally, the elastic retaining ring is a nylon ring or a rubber ring.

[0013] As in the drive shaft assembly described above, optionally, the inner diameter of the circlip in the unstretched state is smaller than the diameter of the drive shaft, so that the circlip is tightly clamped on the drive shaft.

[0014] The drive shaft assembly as mentioned above may optionally include a shaft rod, with mounting parts respectively provided at both ends of the shaft rod, and the ball cage includes a mounting hole, and the mounting part is inserted into the mounting hole to fix the ball cage and the shaft rod in connection.

[0015] In a second aspect, the utility model provides a vehicle, comprising the above-mentioned drive shaft assembly, and the above-mentioned drive shaft assembly is fixedly arranged inside the vehicle body.

[0016] The utility model provides a drive shaft assembly and a vehicle, wherein the drive shaft assembly comprises a travel wheel assembly and a ball cage, wherein the travel wheel assembly comprises a wheel hub bearing, wherein the wheel hub bearing is configured to be arranged inside the travel wheel; wherein the ball cage comprises a bell-shaped housing and a wear reducing member, wherein the bell-shaped housing comprises a bell-shaped housing body and a drive shaft connected to the outer end of the bell-shaped housing body, wherein the drive shaft is passed through the wheel hub bearing to be connected to the travel wheel, and wherein a limiting structure is arranged on the outer peripheral wall of the drive shaft, wherein the wear reducing member is arranged between the limiting structure and the outer end surface of the bell-shaped housing body to avoid contact between the wheel hub bearing and the bell-shaped housing body. In the drive shaft assembly and the vehicle provided by the utility model, the wear reducing member is firmly fixed and is not easy to fall off.

[0017] The structure of a drive shaft assembly and a vehicle provided by the utility model as well as other utility model purposes and beneficial effects thereof will be more clearly understood through the description of the preferred embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a structural schematic diagram of a drive shaft assembly provided in an embodiment of the present application;

[0019] Figure 2 is a cross-sectional view of a drive shaft assembly provided in an embodiment of the present application;

[0020] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0021] Figure 4 It is a structural schematic diagram of a ball cage in a drive shaft assembly provided in an embodiment of the present application;

[0022] Figure 5 is a schematic structural diagram of another drive shaft assembly provided in an embodiment of the present application;

[0023] Figure 6 yes Figure 5 A partial enlarged view of point B in the middle;

[0024] Figure 7 It is a structural schematic diagram of another ball cage in a drive shaft assembly provided in an embodiment of the present application;

[0025] Figure 8 It is a cross-sectional view of another ball cage in a drive shaft assembly provided in an embodiment of the present application.

[0026] Description of reference numerals:

[0027] 10-drive shaft assembly;

[0028] 100-wheel hub bearing;

[0029] 200-ball cage;

[0030] 210- bell housing;

[0031] 211- bell housing body;

[0032] 212-drive shaft;

[0033] 220-friction reducing parts;

[0034] 230-limiting boss;

[0035] 231- guiding slope;

[0036] 232-limiting end surface;

[0037] 240-installation groove;

[0038] 250- elastic retaining ring;

[0039] 260-Shaft. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] The drive shaft is a key component of a car, mainly used to transmit power to the car. Usually the drive shaft is connected to the wheel hub bearing with a spline. When the car starts, in order to eliminate the spline clearance, a slight misalignment will occur, resulting in abnormal noise.

[0042] In order to solve the abnormal friction noise between the end face of the drive shaft and the end face of the wheel hub bearing when the vehicle starts, the common technical means at present is to put a layer of wear-reducing parts between the wheel hub bearing and the drive shaft. When installing the wear-reducing parts, it is necessary to first wipe off the anti-rust oil on the end face of the drive shaft, then apply glue, and keep a certain pressure on the wear-reducing parts. After the glue is dry, the wear-reducing parts can be adhered to the end face of the fixed section of the drive shaft.

[0043] However, this traditional drive shaft structure makes the wear-reducing component not firmly fixed and easily fall off.

[0044] To this end, the present application provides a drive shaft assembly and a vehicle, which adopts a design of connecting a wear-reducing part between the ball cage and the wheel hub bearing to avoid direct contact between the wheel hub bearing and the outer end face of the ball cage to produce abnormal noise; a limit boss is set on the drive shaft to limit the position of the wear-reducing part, and a mounting groove is formed between the limit boss and the outer end face of the bell housing body, and the wear-reducing part is clamped inside the mounting groove, or an elastic retaining ring is used, and the elastic retaining ring is set outside the wear-reducing part to fix the wear-reducing part on the drive shaft. Compared with the traditional method of using glue to bond the gasket to the outer end face of the drive shaft, the wear-reducing part fixing method of the drive shaft is more firm and not easy to fall off.

[0045] A drive shaft assembly in this embodiment is further described below.

[0046] Figure 1 is a structural schematic diagram of a drive shaft assembly provided in an embodiment of the present application; Figure 2 is a cross-sectional view of a drive shaft assembly provided in an embodiment of the present application; Figure 3 yes Figure 2 A partial enlarged view of the middle A; Figure 4 It is a structural schematic diagram of a ball cage in a drive shaft assembly provided in an embodiment of the present application; Figure 5 is a schematic structural diagram of another drive shaft assembly provided in an embodiment of the present application; Figure 6 yes Figure 5 A partial enlarged view of point B in the middle; Figure 7 It is a structural schematic diagram of another ball cage in a drive shaft assembly provided in an embodiment of the present application; Figure 8 It is a cross-sectional view of another ball cage in a drive shaft assembly provided in an embodiment of the present application.

[0047] like Figures 1 to 4 As shown, the embodiment of the present application provides a drive shaft assembly 10. Figure 4It can be seen that the drive shaft assembly 10 includes a traveling wheel assembly and a ball cage 200. The traveling wheel assembly includes a wheel hub bearing 100. The wheel hub bearing 100 is constructed to be arranged inside the traveling wheel; the ball cage 200 includes a bell-shaped shell 210 and a wear-reducing member 220. The bell-shaped shell 210 includes a bell-shaped shell body 211 and a drive shaft 212 connected to the outer end of the bell-shaped shell body 211. The drive shaft 212 is penetrated by the wheel hub bearing 100 to be connected to the traveling wheel, and a limiting structure is provided on the outer peripheral wall of the drive shaft 212. The wear-reducing member 220 is arranged between the limiting structure and the outer end face of the bell-shaped shell body 211 to avoid contact between the wheel hub bearing 100 and the outer end face of the bell-shaped shell body 211.

[0048] In this way, by adopting the design of connecting the wear reducing member 220 between the ball cage 200 and the wheel hub bearing 100, the wheel hub bearing 100 is prevented from directly contacting the outer end surface of the ball cage 200 to produce abnormal noise; a limiting boss 230 is provided on the drive shaft 212 to limit the position of the wear reducing member 220, and a mounting groove 240 is formed between the limiting boss 230 and the outer end surface of the bell housing body 211, and the wear reducing member 220 is clamped inside the mounting groove 240, or an elastic retaining ring 250 is used and the elastic retaining ring 250 is blocked outside the wear reducing member 220, so that the wear reducing member 220 is fixedly connected to the drive shaft 212. Compared with the traditional method of gluing the gasket to the outer end surface of the drive shaft, the fixing method of the wear reducing member of the drive shaft is more firm and not easy to fall off.

[0049] Among them, the drive shaft assembly 10 connects the engine and the running wheels to transmit the power generated by the engine to the running wheels, driving the vehicle forward. It plays an important role in the vehicle transmission system in transmitting power, adjusting speed and torque, supporting vehicle weight and steering control. It is a key component for the normal driving and operation of the vehicle.

[0050] Specifically, the wheel hub bearing 100 is connected to the drive shaft 212 via a spline, and the purpose of such a setting is that the spline structure has the characteristics of high strength and high transmission efficiency, and is easy to disassemble and maintain. However, if the ball cage 200 is not set properly, when the car starts, a slight displacement will occur to eliminate the spline matching clearance, resulting in abnormal noise.

[0051] In this embodiment, the wear reducing member 220 is disposed between the wheel hub bearing 100 and the outer end surface of the bell housing body 211, so that when the driving shaft 212 drives the wheel hub bearing 100 to rotate, the outer end surface of the bell housing body 211 is prevented from directly contacting the wheel hub bearing 100 and generating abnormal noise.

[0052] In some embodiments, the friction reducing member 220 has a central hole, the driving shaft 212 passes through the central hole, and the limiting structure surrounds the circumferential outer side of the driving shaft 212 .

[0053] The type of the wear-reducing component 220 is a wear-reducing gasket, which has the characteristic of good wear resistance and can reduce the friction between the wheel hub bearing 100 and the outer end surface of the bell housing body 211 .

[0054] In some embodiments, the limiting structure includes a limiting boss 230 , a mounting groove 240 is formed between the limiting boss 230 and the outer end surface of the bell housing body 211 , and the wear reducing member 220 is clamped in the mounting groove 240 .

[0055] Among them, the width of the installation groove 240 is greater than the thickness of the wear-reducing member 220. One or more wear-reducing members 220 can be placed in the installation groove 240 according to actual needs to avoid direct contact between the wheel hub bearing 100 and the bell housing body 211 and reduce the wear of the wheel hub bearing 100.

[0056] The limiting boss 230 is a conical boss, which is provided to play a guiding role when the wear reducing member 220 is pressed in, so as to facilitate the pressing in of the wear reducing member 220 .

[0057] Specifically, the outer diameter of the limiting boss 230 is about 2 mm larger than the inner diameter of the wear reducing member 220 . This setting is intended to ensure that the mounting groove 240 can hold the wear reducing member 220 and facilitate the installation of the wear reducing member 220 .

[0058] In some embodiments, the limiting boss 230 is formed on the circumferential side wall of the driving shaft 212. Figure 3 As shown, the purpose of such arrangement is to fix the wear reducing member 220 between the wheel hub bearing 100 and the outer end surface of the bell housing body 211 to prevent the wear reducing member 220 from moving along the axial direction of the drive shaft 212 during the rotation of the drive shaft 212, thereby preventing it from falling off.

[0059] Among them, Figure 3 As shown, the outer diameter of the limiting boss 230 is larger than the inner diameter of the hub bearing 100. The purpose of such a setting is to prevent the limiting boss 230 from interfering with the hub bearing 100, thereby affecting its mechanical properties.

[0060] In some embodiments, the side of the limiting boss 230 facing the hub bearing 100 is a guiding inclined surface 231 inclined relative to the driving shaft 212 , and the side of the limiting boss 230 facing the bell housing body 211 is a limiting end surface 232 .

[0061] Among them, the inner diameter of the wear reducing member 220 is larger than the diameter of the drive shaft 212 and smaller than the outer diameter of the limiting boss 230. Specifically, the wear reducing member 220 will undergo elastic deformation when passing through the guiding bevel 231, and the diameter of the wear reducing member 220 will gradually increase, so that it passes through the guiding bevel 231. When the wear reducing member 220 passes through the guiding bevel 231, the elastic force applied to the wear reducing member 220 disappears, and the diameter of the wear reducing member 220 returns to its original size. The purpose of such a setting is to enable the wear reducing member 220 to be fixedly placed in the mounting groove 240 with strong stability.

[0062] Among them, Figure 3 As shown, the purpose of setting the guiding bevel 231 on the limiting boss 230 is to allow the wear reducing member 220 to easily pass through the limiting boss to facilitate installation. As an optional embodiment, the included angle of the guiding bevel 231 is 45°.

[0063] In order to ensure that the limiting boss 230 can withstand vibration, impact and torque under working conditions, specifically, the limiting boss 230 should have a certain thickness so that it has sufficient strength and durability to prevent breakage, thereby affecting the performance of the ball cage 200.

[0064] Among them, Figure 3 As shown, the limiting end surface 232 is a right-angle surface, and the mounting groove 240 is a rectangular groove. The purpose of such a setting is to increase the contact area with the wear reducing member 220, so that the wear reducing member 220 is fixed more tightly and can also withstand a larger load.

[0065] Specifically, the surface of the mounting groove 240 should be properly treated, such as finish, lubrication and anti-corrosion treatment, to ensure that the surface of the mounting groove 240 is smooth and clean and can provide a good working environment.

[0066] In some embodiments, the limiting structure includes an elastic retaining ring 250, which surrounds the outside of the driving shaft 212 and is disposed on the outer end surface of the wear reducing member 220 away from the bell housing body 211. Figure 5 and Figure 6 shown.

[0067] The elastic retaining ring 250 has a certain elasticity in the axial direction of the drive shaft 212 , and can absorb axial displacement or deformation, maintain a certain stability and balance of the drive shaft 212 , and avoid problems caused by axial clearance or offset of the drive shaft 212 .

[0068] Specifically, the circlip 250 can absorb and disperse the impact and vibration force on the drive shaft 212, play a role of buffering and shock absorption, protect other components of the drive shaft assembly 10 from impact and vibration, and extend the service life. In addition, the circlip 250 is easy to install, replace and maintain.

[0069] In some embodiments, optionally, the elastic retaining ring 250 is a nylon ring or a rubber ring.

[0070] The elastic retaining ring 250 is usually made of elastic material and has certain elasticity and deformation ability. When external force or pressure acts on the elastic retaining ring 250, it will undergo elastic deformation to form a certain deformation amount and shape, thereby generating a certain reaction force.

[0071] In some embodiments, the inner diameter of the circlip 250 in the unstretched state is optionally smaller than the diameter of the drive shaft 212, so that the circlip 250 is tightly clamped on the drive shaft 212. Figure 7 and Figure 8 shown.

[0072] The tightening principle of the circlip 250 is to provide a certain pressure or damping effect through its elastic deformation characteristics, so as to achieve the tightening and fixing of the mechanical device. Specifically, the elastic deformation of the circlip 250 will cause it to apply a certain pressure to the drive shaft 212, and transmit the external force or pressure to the wear reducing member 220 to keep it in a certain position or state, thereby achieving the tightening effect, preventing the wear reducing member 220 from loosening or falling off, and ensuring the stability and safety of the drive shaft assembly 10.

[0073] Specifically, the elastic retaining ring 250 can be an O-ring, and the nominal value of the inner diameter of the wear reducing member 220 is the same as the nominal value of the outer diameter of the limiting boss 230, wherein the inner diameter of the wear reducing member 220 has an upper tolerance of 0.5 mm, and the outer diameter of the limiting boss 230 has a lower tolerance of 0.5 mm. The purpose of such a setting is to ensure that the wear reducing member 220 can be placed on the limiting boss 230.

[0074] The inner diameter of the O-ring is smaller than the inner diameter of the guide boss 230 . After the O-ring is installed, the O-ring is in a stretched state and can maintain a contraction force so as to be tightly fitted on the guide boss 230 .

[0075] Among them, as an optional implementation, the material of the wear-reducing part 220 is a composite material, which has good wear resistance and stable performance. Since the wear-reducing part 220 is made of composite materials, even if the two sides of the wear-reducing part 220 produce a slight friction with the wheel hub bearing 100 and the bell-shaped shell body 211 made of metal material, no abnormal sound will occur, and it can also serve for a long time in the high temperature environment inside the ball cage 200.

[0076] In some embodiments, a shaft rod 260 is included, and mounting portions are respectively provided at both ends of the shaft rod. The ball cage 200 includes a mounting hole, and the mounting portion is inserted into the mounting hole, so that the ball cage 200 is fixedly connected to the shaft rod 260 .

[0077] The drive shaft assembly 10 further includes a shaft 260, and the ball cage 200 is arranged at both ends of the shaft 260, and is used to connect the differential and the running wheel of the vehicle. The function of the ball cage 200 is to enable the shaft 260 of the vehicle to transmit power at different angles while maintaining the stability and balance of the transmission system. It plays an important role in transmitting torque, allowing displacement, reducing vibration and noise, and adjusting the working angle in the drive shaft assembly 10, and is an indispensable component of the drive shaft assembly 10. Specifically, the ball cage 200 includes a star sleeve, a retainer, and a steel ball. The star sleeve is arranged inside the bell housing body 211, and the shaft 260 is inserted into the star sleeve to connect the shaft 260 with the ball cage 200.

[0078] The drive shaft assembly 10 provided in this embodiment includes a traveling wheel assembly and a ball cage 200. The traveling wheel assembly includes a wheel hub bearing 100. The wheel hub bearing 100 is constructed to be arranged inside the traveling wheel. The ball cage 200 includes a bell-shaped shell 210 and a wear-reducing member 220. The bell-shaped shell 210 includes a bell-shaped shell body 211 and a drive shaft 212 connected to the outer end of the bell-shaped shell body 211. The drive shaft 212 is penetrated by the wheel hub bearing 100 to be connected to the traveling wheel, and a limiting structure is provided on the outer peripheral wall of the drive shaft 212. The wear-reducing member 220 is arranged between the limiting structure and the outer end surface of the bell-shaped shell body 211, and the two ends of the wear-reducing member are respectively to avoid contact between the wheel hub bearing 100 and the outer end surface of the bell-shaped shell body 211. In this way, by adopting the design of connecting the wear reducing member 220 between the ball cage 200 and the wheel hub bearing 100, the wheel hub bearing 100 is prevented from directly contacting the outer end surface of the ball cage 200 to produce abnormal noise; a limiting boss 230 is provided on the drive shaft 212 to limit the position of the wear reducing member 220, and a mounting groove 240 is formed between the limiting boss 230 and the outer end surface of the bell housing body 211, and the wear reducing member 220 is clamped inside the mounting groove 240, or an elastic retaining ring 250 is used and the elastic retaining ring 250 is blocked outside the wear reducing member 220, so that the wear reducing member 220 is fixedly connected to the drive shaft 212. Compared with the traditional method of gluing the gasket to the outer end surface of the drive shaft, the fixing method of the wear reducing member of the drive shaft is more firm and not easy to fall off.

[0079] The present embodiment further provides a vehicle, including a vehicle body and a drive shaft assembly 10 disposed on the vehicle body, wherein the specific structure, function and working principle of the drive shaft assembly 10 have been described in detail in the aforementioned embodiments and will not be repeated here.

[0080] The drive shaft assembly 10 can be applied to vehicles such as small passenger cars, station wagons, and multi-purpose passenger cars.

[0081] It should be noted that the embodiments represented by "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0082] In general, terms should be understood, at least in part, by the context in which they are used. For example, the terms "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "an" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0083] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0084] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A drive shaft assembly, characterized in that: It includes a running wheel assembly and a ball cage, wherein the running wheel assembly includes a wheel hub bearing, and the wheel hub bearing is configured to be arranged inside the running wheel; The ball cage includes a bell-shaped shell and a wear-reducing component. The bell-shaped shell includes a bell-shaped shell body and a drive shaft connected to the outer end of the bell-shaped shell body. The drive shaft passes through the wheel hub bearing to be connected to the running wheel, and a limiting structure is provided on the outer peripheral wall of the drive shaft. The wear-reducing component is provided between the limiting structure and the outer end surface of the bell-shaped shell body to avoid contact between the wheel hub bearing and the outer end surface of the bell-shaped shell body.

2. The drive shaft assembly according to claim 1, characterized in that: The wear reducing member has a central hole, the driving shaft passes through the central hole, and the limiting structure surrounds the circumferential outer side of the driving shaft.

3. The drive shaft assembly according to claim 1 or 2, characterized in that: The limiting structure comprises a limiting boss, a mounting groove is formed between the limiting boss and the outer end surface of the bell-shaped housing body, and the wear-reducing member is clamped in the mounting groove.

4. The drive shaft assembly according to claim 3, characterized in that: The limiting boss is formed on the circumferential side wall of the driving shaft.

5. The drive shaft assembly according to claim 3, characterized in that: The side of the limiting boss facing the wheel hub bearing is a guiding inclined surface inclined relative to the driving shaft, and the side of the limiting boss facing the bell-shaped housing body is a limiting end surface.

6. The drive shaft assembly according to claim 1 or 2, characterized in that: The limiting structure comprises an elastic retaining ring, which surrounds the outer side of the driving shaft and is disposed on a side of the outer end surface of the wear-reducing component that is away from the bell-shaped housing body.

7. The drive shaft assembly according to claim 6, characterized in that: The elastic retaining ring is a nylon ring or a rubber ring.

8. The drive shaft assembly according to claim 7, characterized in that: The inner diameter of the circlip in an unstretched state is smaller than the diameter of the drive shaft so that the circlip is tightly clamped on the drive shaft.

9. The drive shaft assembly according to claim 1 or 2, characterized in that: It comprises a shaft rod, both ends of which are respectively provided with mounting parts, and the ball cage comprises a mounting hole, and the mounting part is inserted into the mounting hole so that the ball cage is fixedly connected to the shaft rod.

10. A vehicle, characterized in that: It comprises the drive shaft assembly and a vehicle body as described in any one of claims 1 to 9, wherein the drive shaft assembly is fixedly arranged inside the vehicle body.

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