Hub bearing assembly, driving shaft assembly and vehicle

Abstract

The utility model provides a hub bearing assembly, drive shaft assembly and vehicle, the hub bearing assembly includes hub bearing, ball cage and connecting piece, wherein one end of hub bearing is equipped with first end face spline, one end of ball cage is equipped with second end face spline, connecting piece is equipped with connecting hole and working face, and the working face is equipped with the first end face spline and the second end face spline. The connecting piece is connected with one of the hub bearing and the ball cage through the connecting hole and abuts against the other one of the hub bearing and the ball cage through the working face, so that the hub bearing and the ball cage abut against each other, and the first end face spline is connected with the second end face spline. According to the hub bearing assembly, the length of the cantilever can be shortened in the length direction of the hub bearing, and the connecting piece with a large diameter can be adopted in the radial direction of the hub bearing, so that the design and development difficulty of the connecting piece can be reduced, the requirement of a severe working environment can be met, the production cost is low, and the connection reliability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle parts, and in particular to a wheel hub bearing assembly. At the same time, the utility model also relates to a drive shaft assembly using the wheel hub bearing assembly, and a vehicle equipped with the drive shaft assembly. Background Art

[0002] At present, in the structure where the wheel hub bearing and the ball cage are connected by the end face spline, the locking bolt is generally screwed to the bell housing of the ball cage. The working environment of the locking bolt is relatively harsh. In addition to bearing the axial tension transmitted to the drive shaft when the vehicle is running, the locking bolt also needs to bear the axial tension of the torque acting on the tooth surface of the end face teeth because the end face teeth are used to transmit the torque.

[0003] Locking bolts are often connected using the torque angle method. The locking process of the torque angle method is to first tighten the locking bolt to the specified locking torque, and then apply a torque to tighten the bolt to the critical point of the yield strength of the metal material. The elastic deformation of the material is overcome by a slight yield of the material to achieve anti-loosening.

[0004] For the above reasons, this puts forward higher design requirements for the structural design, material selection, process, and product consistency of the locking bolts. Ordinary bolts are difficult to meet the requirements of the working environment. Therefore, the locking bolts in the above structure are still a special non-standard part. When developing locking bolts, it is also necessary to produce corresponding molds, tooling, and inspection fixtures. After they are purchased by the OEM, they need to be managed by a dedicated person in inventory. During production and assembly, the operators of the production line need to be professionally trained, resulting in relatively high explicit and implicit costs for the application of locking bolts.

[0005] In addition, due to the improvement of bolt performance indicators and fewer supply chain resources, the purchase price of locking bolts is much higher than that of ordinary bolts. Moreover, due to structural design defects or insufficient quality assurance capabilities of suppliers, locking bolts may suffer brittle or fatigue fractures during actual use, resulting in safety risks for customers during driving. Utility Model Content

[0006] In view of this, the utility model aims to provide a wheel hub bearing assembly to avoid the problems caused by the use of locking bolts.

[0007] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0008] A wheel hub bearing assembly comprises a wheel hub bearing, a ball cage and a connecting piece; wherein:

[0009] One end of the hub bearing is provided with a first end face spline;

[0010] One end of the ball cage is provided with a second end face spline;

[0011] A connecting hole is provided in the connecting member, and a working surface is provided on the connecting member. The connecting member is connected to one of the wheel hub bearing and the ball cage through the connecting hole, and is pressed against the other of the wheel hub bearing and the ball cage via the working surface, so that the wheel hub bearing and the ball cage are pressed against each other, and the first end face spline is connected to the second end face spline.

[0012] Furthermore, the connecting member is threadedly connected to the wheel hub bearing through the connecting hole;

[0013] The connecting piece is movably arranged on the ball cage;

[0014] The ball cage is provided with a blocking portion, and the blocking portion is used to prevent the connecting member from being separated from the ball cage.

[0015] Furthermore, the blocking portion is a boss provided on the outer shell of the ball cage, and one end of the connecting hole is provided with a bent portion bent inwardly;

[0016] The boss blocks one side of the bending portion, and the working surface is provided at one end of the bending portion facing the boss.

[0017] Furthermore, a threaded anti-loosening structure is provided between the connecting piece and the wheel hub bearing.

[0018] Furthermore, the connecting member is screwed to the ball cage through the connecting hole;

[0019] One end of the ball cage is provided with a protruding column extending outward, the protruding column and the second end face spline are located at the same end of the ball cage, and the protruding column is arranged through the inner ring of the wheel hub bearing;

[0020] The connecting piece is a nut, the nut is threadedly connected to the boss, and one end of the nut is provided with the working surface.

[0021] Furthermore, a threaded anti-loosening structure is provided between the connecting piece and the ball cage.

[0022] Furthermore, one end of the ball cage is provided with a protruding column extending outward, the protruding column and the second end face spline are located at the same end of the ball cage, the protruding column is arranged through the inner ring of the wheel hub bearing, and a groove is provided on the protruding column;

[0023] The connecting member is a clip spring, which is embedded in the groove, and one end of the clip spring is provided with the working surface.

[0024] Furthermore, a positioning structure is provided between the boss and the inner ring, and when the boss passes through the inner ring, the positioning structure can limit the radial position of the boss relative to the inner ring.

[0025] Compared with the prior art, the utility model has the following advantages:

[0026] The wheel hub bearing assembly described in the utility model adopts a connecting piece with a connecting hole to replace the locking bolt, so as to realize the end face spline connection structure of the wheel hub bearing and the ball cage. In the length direction of the wheel hub bearing, it is beneficial to shorten the cantilever length. In the radial direction of the wheel hub bearing, a connecting piece with a larger diameter can be used, thereby reducing the difficulty of designing and developing the connecting piece. The connecting piece can adopt a nut, for example, to meet the requirements of harsh working environment. The storage cost, design and development cost, and testing cost are all low, and the connection reliability is high, so it has good practicality.

[0027] In addition, the connecting piece is connected to the wheel hub bearing or the ball cage, which is convenient for disassembly and assembly. The connecting piece is movably arranged on the ball cage to prevent the connecting piece from being separated from the ball cage, which is convenient for assembly and not easy to lose. The blocking part is set as a boss, and a bending part is set at one end of the connecting hole, which has a simple structure, occupies less space, and is convenient for processing and arrangement.

[0028] In addition, the connector is screwed to the ball cage, which is convenient for assembly and disassembly. A boss is set at one end of the ball cage, and the connector is set as a nut. The nut can be a standard part, such as other nuts on the vehicle, to achieve universality, and the design and development cost is low. The diameter of the boss is larger than the diameter of the locking bolt. During the installation process, the boss can be used to cooperate with the inner ring of the wheel hub bearing to achieve radial positioning, which can improve the convenience of assembly. In addition, this structure is also conducive to improving the versatility of the ball cage. The ball cage prepared by a forging die can be used with a variety of wheel hub bearings of different specifications by simply adjusting the blanking weight. The threaded anti-loosening structure can further improve the reliability of the connection between the connector and the wheel hub bearing or the ball cage.

[0029] At the same time, a structure in which the boss cooperates with the retaining spring is provided. In addition to the same function as described above, the boss has a simple structure, and the retaining spring can be made of standard parts, which has a low cost.

[0030] Another object of the present invention is to provide a drive shaft assembly, wherein the drive shaft assembly comprises the wheel hub bearing assembly as described above.

[0031] The drive shaft assembly of the utility model can reduce production costs and has high structural reliability by applying the aforementioned wheel hub bearing assembly.

[0032] In addition, another object of the present invention is to provide a vehicle, on which the drive shaft assembly as described above is provided.

[0033] The vehicle described in the utility model, by applying the aforementioned wheel hub bearing assembly, does not need to worry about the risk of breakage caused by the use of locking bolts, and can improve the safety of vehicle driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0035] Figure 1 This is a schematic structural diagram of a wheel hub bearing assembly according to Embodiment 1 of the present utility model;

[0036] Figure 2 It is a schematic structural diagram of the wheel hub bearing assembly according to the second embodiment of the utility model and the existing wheel hub bearing assembly;

[0037] Figure 3 This is a schematic structural diagram of a wheel hub bearing assembly according to Embodiment 2 of the present utility model;

[0038] Figure 4 This is a schematic structural diagram of a wheel hub bearing assembly according to Embodiment 2 of the present utility model;

[0039] Figure 5 This is a schematic diagram of the structure of the ball cage according to an embodiment of the utility model;

[0040] Figure 6 This is a schematic structural diagram of the wheel hub bearing assembly described in Embodiment 3 of the present utility model.

[0041] Description of reference numerals:

[0042] 1. Wheel hub bearing; 2. Ball cage; 3. Connector; 4. Locking bolt;

[0043] 101, inner ring; 102, outer ring; 103, inner ring protective sleeve;

[0044] 201, bell housing; 202, cage; 203, steel ball; 204, inner star wheel;

[0045] 2011, blocking portion; 2012, convex column;

[0046] 301, connecting hole; 302, working surface; 303, bending portion; 304, retaining spring. DETAILED DESCRIPTION

[0047] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0048] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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 position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0049] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0050] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0051] Embodiment 1

[0052] The present embodiment relates to a wheel hub bearing assembly, which mainly improves the connection structure of the wheel hub bearing 1 and the ball cage 2 connected by the end face spline, increases the commonality of parts, reduces production costs, and is conducive to improving connection reliability.

[0053] Based on the above design concept, an exemplary structure of the hub bearing assembly of this embodiment is as follows: Figure 1 As shown, it mainly includes a hub bearing 1, a ball cage 2 and a connecting piece 3; wherein the hub bearing 1 mainly includes an inner ring 101, an outer ring 102 and an inner ring protective sleeve 103. The ball cage 2 mainly includes a bell housing 201, a retaining frame 202, steel balls 203 and an inner star wheel 204.

[0054] One end of the wheel hub bearing 1, specifically one end of the inner ring 101, is provided with a first end face spline, and one end of the ball cage 2, specifically one end of the bell housing 201, is provided with a second end face spline. After the wheel hub bearing 1 and the ball cage 2 are assembled together, the inner ring 101 and the bell housing 201 are connected by the first end face spline and the second end face spline.

[0055] In order to achieve the purpose of improving the commonality rate and reducing the production cost, in this embodiment, a connecting hole 301 is provided in the connecting member 3, and a working surface 302 is provided on the connecting member 3. The connecting member 3 is connected to one of the wheel hub bearing 1 and the ball cage 2 through the connecting hole 301, and is pressed against the other of the wheel hub bearing 1 and the ball cage 2 through the working surface 302, so that the wheel hub bearing 1 and the ball cage 2 are pressed against each other, and the first end face spline is connected to the second end face spline.

[0056] As a preferred embodiment, the connecting member 3 is threadedly connected to the wheel hub bearing 1 or the ball cage 2 through the connecting hole 301. Specifically, an internal thread is provided in the connecting hole 301, and an external thread matching the internal thread is provided on one of the wheel hub bearing 1 and the ball cage 2. The connecting member 3 is threadedly connected to the wheel hub bearing 1 or the ball cage 2, which is convenient for assembly and disassembly. Figure 1 As shown, in this embodiment, the connecting member 3 is substantially sleeve-shaped, and is connected to the external thread on the inner ring 101 of the hub bearing 1 through the connecting hole 301 .

[0057] In a preferred embodiment, the connecting member 3 is movably disposed on the cage 2, and a blocking portion 2011 is disposed on the cage 2, and the blocking portion 2011 is used to prevent the connecting member 3 from being separated from the cage 2. In this structure, the connecting member 3 is movably disposed on the cage 2, which can prevent the connecting member 3 from being separated from the cage 2, and the connecting member 3 and the inner ring 101 are easy to assemble and are not easily lost.

[0058] In a preferred embodiment, the blocking portion 2011 is a boss disposed on the outer shell of the cage 2, and one end of the connecting hole 301 is provided with a bent portion 303 bent inwardly, the boss can be blocked on one side of the bent portion 303, and one end of the bent portion 303 facing the boss constitutes a working surface 302. Here, the blocking portion 2011 is set as a boss, and the bent portion 303 is set at one end of the connecting hole 301, which has a simple structure, occupies less space, and is convenient for layout.

[0059] It should be understood that, in addition to the blocking portion 2011 being a boss, it can also be configured as other structures, for example, the bell housing 201 is provided with threads, the blocking portion 2011 is a ring screwed on the bell housing 201, or a slot is provided on the bell housing 201, the blocking portion 2011 is configured as a retaining ring, and is embedded in the slot. The bent portion 303 at one end of the connecting hole 301 can also be configured as other structures, for example, a protrusion protruding radially inwardly is provided in the connecting hole 301.

[0060] In actual processing, the shape of the bending portion 303 can be, for example, a continuous annular member, and the number of bosses can be multiple, and the multiple bosses are distributed at intervals in the circumferential direction of the bell housing 201, and the number of bosses is not limited here. Figure 1As shown, the initial state of each boss can be convex to the left along the axial direction of the ball cage 2. After the connecting member 3 is installed from left to right, a tool is used to bend each boss 90 degrees to form Figure 1 As shown in the radially outwardly protruding state of the ball cage 2, the boss can be blocked on the left side of the bent portion 303 to prevent the connecting member 3 from being separated from the bell housing 201 without affecting the threaded connection between the connecting member 3 and the inner ring 101.

[0061] When the wheel hub bearing 1 and the ball cage 2 are assembled, after the wheel hub bearing 1 and the ball cage 2 are aligned at the installation position, the connecting piece 3 is tightened so that the working surface 302 on the left side of the bent portion 303 is pressed against the boss, and the assembly is completed.

[0062] As a preferred embodiment, a threaded anti-loosening structure is provided between the connector 3 and the hub bearing 1, which can further improve the reliability of the connection between the connector 3 and the hub bearing 1. The threaded anti-loosening structure refers to the structure in the prior art, and for example, a riveting tool can be used to knock and deform a local area of ​​the connector 3 into a corresponding groove on the inner ring 101 to achieve physical anti-loosening, or a nylon insert can be used to prevent loosening, or a pin hole can be used to prevent loosening. The deformation area can also be pre-processed on the connector 3, and the internal thread of the connector 3 and the external thread of the inner ring 101 generate an extrusion force to prevent loosening.

[0063] The wheel hub bearing assembly of this embodiment adopts a connecting piece 3 with a connecting hole 301 to replace the locking bolt 4, so as to realize the end face spline connection structure of the wheel hub bearing 1 and the ball cage 2, thereby avoiding the risk of bolt breakage, reducing the procurement inventory cost of standard parts and the process risk of new technology application.

[0064] In the length direction of the hub bearing 1, the connector 3 in this embodiment is conducive to shortening the cantilever length. In the radial direction of the hub bearing 1, a connector 3 with a larger diameter can be used, thereby reducing the difficulty of designing and developing the connector 3. The connector 3 can more easily meet the requirements of harsh working environments, has low design and development costs, and has high connection reliability, and has good practicality.

[0065] Embodiment 2

[0066] This embodiment relates to a wheel hub bearing assembly, such as Figures 2 to 5 As shown, the difference between the hub bearing assembly of the first embodiment and the first embodiment is that the connecting member 3 is screwed to the ball cage 2 through the connecting hole 301, rather than connected to the wheel hub bearing 1, so that it is easy to disassemble and assemble. And the ball cage 2 in the first embodiment can be provided with the following boss 2012 according to the needs, while in the present embodiment, the boss 2012 is indispensable.

[0067] Figure 5An exemplary structure of the ball cage 2 is shown, where an outwardly extending boss 2012 is provided at one end of the bell-shaped housing 201, the boss 2012 extends outward of the bell-shaped housing 201 along the axial direction of the ball cage 2, and the boss 2012 and the second end face spline are located at the same end of the ball cage 2.

[0068] like Figure 4 and Figure 5 As shown, when the wheel hub bearing 1 and the ball cage 2 are assembled together, the boss 2012 is arranged through the inner ring 101 of the wheel hub bearing 1, and Figure 5 The boss 2012 shown has a large diameter section with a diameter of D1 and a small diameter end with a diameter of D2, D1 is larger than D2, the large diameter section and the small diameter section are connected by a connecting section in the shape of a truncated cone, the outer surface of the large diameter section is a smooth rod, and the outer surface of the small diameter section is provided with an external thread.

[0069] As a preferred embodiment, a positioning structure is provided between the boss 2012 and the inner ring 101, and the positioning structure can limit the radial position of the boss 2012 on the inner ring 101 during the process of the boss 2012 passing through the inner ring 101. In this embodiment, the positioning structure is composed of a large diameter section and the wall of the opening of the inner ring 101, and the two are clearance-matched, so that during the process of the boss 2012 passing through the inner ring 101, the axial center lines of the opening of the inner ring 101 and the large diameter section of the boss 2012 can coincide, thereby playing a role in radial centering.

[0070] The connecting piece 3 in the present embodiment is preferably a nut. When the boss 2012 passes into the inner ring 101 from right to left, the large diameter section of the boss 2012 is matched with the clearance of the hole wall of the inner ring 101, and the matching clearance is 0.05-0.2mm, for example, it can be 0.05mm, 0.1mm or 0.2mm, which can play a role in radial positioning, that is, the pre-centering of the assembly, which is beneficial for the bell housing 201 and the inner ring 101 to quickly find the installation position. Subsequently, the nut is screwed together with the small diameter section of the boss 2012 by rotating it, and the end of the nut that is close to the inner ring 101 constitutes the working surface 302 of the present embodiment.

[0071] It should be pointed out here that, according to actual needs, the large diameter section of the boss 2012 and the hole wall of the inner ring 101 can adopt other matching methods besides the clearance fit, such as a larger gap between the two. In addition, the large diameter section can be a polished rod, Figure 3 As shown, the diameter of the protruding column 2012 is not divided into a large diameter section and a small diameter section, and it is also possible to directly set it as a threaded rod with the same diameter.

[0072] After tightening the nut to the specified torque using a torque wrench, use a rivet point tool to knock the deformed area of ​​the nut into the groove corresponding to the boss 2012 to achieve physical anti-loosening, and use an inspection marker pen to inspect and mark the rivet points. At this point, the assembly of the ball cage 2 and the wheel hub bearing 1 is completed.

[0073] In addition, other existing thread anti-loosening structures can be used between the nut and the boss 2012. The thread anti-loosening structure can be specifically described in the first embodiment, and will not be described in detail here.

[0074] During the assembly process, the wheel-end brake disc (not shown in the figure) is rotated to connect the second end face spline of the ball cage with the first end face spline of the hub bearing 1, and then the brake disc is pushed to the predetermined position of the assembly tool. At this time, the large diameter section and the opening of the hub bearing 1 still have a centering effect, and the second end face spline of the ball cage 2 will not fall off the first end face spline of the hub bearing 1, causing the problem of repeated assembly.

[0075] In order to intuitively see the advantages of the bearing assembly of this embodiment over the existing hub assembly using the locking bolt 4, as shown in FIG. Figure 2 As shown, the structure above the center line is the structure of the wheel hub bearing assembly of this embodiment, and the structure below the center line is the structure of the existing wheel hub bearing assembly.

[0076] In this embodiment, the large diameter section D1 can be adjusted according to the output torque and thread specifications of the vehicle to meet the requirements of the structural strength of the boss under different torque conditions. The diameter of the boss 212 is larger than the diameter when the locking bolt 4 is used. At the same time, it can play the role of an assembly centering shaft during assembly, reducing the labor intensity of the assembly workers and improving production efficiency. The bell housing 201 is generally made by forging technology, and the large diameter section D1 does not need to be machined. When the end face tooth spline of the bell housing 201 is finished, the large diameter section D1 can be finished together.

[0077] Still refer to Figure 2 Combined with Figure 4 As shown, in the existing structure, when the locking bolt 4 is used to connect the wheel hub bearing 1 and the ball cage 2, the cantilever length of the locking bolt 4 is L2, and when the nut is used to replace the locking bolt 4, the cantilever length of the boss 2012 is L1, and the value of L1 can be much smaller than L2, which is convenient for the assembly of the wheel hub bearing 1 and the ball cage 2, and also has a higher structural strength, while reducing the design and development requirements for the nut.

[0078] In this embodiment, the cantilever length is relatively short, so the cantilever length can also be used as a standardized parameter for design, thereby reducing the risk of thread failure due to changes in the cantilever length and improving the design reliability of the technical solution.

[0079] In addition, the length L3 of the boss 2012 can be adjusted according to the thickness of the wheel hub bearing 1, which can optimize the disadvantage of having a wide variety of fixed joints due to large differences in the thickness of the wheel hub bearing 1 under different tire offsets. For example, in different car models, the thickness of the wheel hub bearing 1 matched with the same specification of the ball cage 2 may be different. In order to ensure the connection strength, the length of the boss 2012 should be adjusted accordingly when the thickness of the wheel hub bearing 1 is different.

[0080] At this time, the same specification of ball cages 2 can use the same forging and finishing molds to improve the commonality of the molds. The length L3 of the boss 2012 can be compensated in the length direction by adjusting the blanking weight, avoiding the development of multiple forging molds due to different product structures or the increase in the cost of a single part due to mold stagnation caused by the incommonality of the molds.

[0081] In addition, in this embodiment, the small diameter section D2 can be adjusted according to the power output torque value of the whole vehicle or the change in the weight of the whole vehicle, thereby reducing the risk of thread failure caused by changes in axial tension due to changes in power parameters.

[0082] After calculation, it is found that the wheel hub bearing assembly of this embodiment and the existing wheel hub bearing assembly have the same weight, and the weight will not increase due to structural changes.

[0083] In this embodiment, a nut with a connecting hole 301 is used to replace the locking bolt 4, which can reduce the risk of bolt breakage, reduce the procurement inventory cost of standard parts and the process risk of new technology application, and does not need to use the torque angle method for tightening, and does not need to purchase a special torque wrench with the corresponding torque. The nut can be consistent with the locking nut used by the OEM, ultimately reducing the manufacturing cost and after-sales cost for the OEM and bringing a better product experience to the end customers.

[0084] In addition, the selection of thread specifications is not affected by the limitations of the internal structure of the wheel hub bearing 1, and larger thread specifications can be used for tightening. When the connector 3 uses a nut, the cantilever length of the threaded connection can be strengthened by lengthening the boss 2012 to increase the structural strength. The force arm length of the threaded connection is shortened accordingly, which can reduce the stress value of the threaded connection, avoid the problem of loosening or breaking caused by deformation of the locking bolt 4 in the aftermarket, and improve the reliability of the threaded connection.

[0085] In this embodiment, end splines are used for torque transmission, and the boss of the ball cage 2 does not need to be subjected to medium frequency heat treatment. The structure of this embodiment is different from the existing structure of connecting the wheel hub bearing 1 and the ball cage 2 with end splines, and there is no increase in the cost of the manufacturing process.

[0086] Embodiment 3

[0087] This embodiment relates to a wheel hub bearing assembly, such as Figure 6As shown, it has substantially the same structure as the wheel hub bearing assembly of the second embodiment, except that, in this embodiment, the connecting member 3 is a retaining spring 304 .

[0088] In this embodiment, a boss 2012 extending outward is provided at one end of the ball cage 2. The boss 2012 and the second end face spline are located at the same end of the ball cage 2. The boss 2012 is passed through and placed in the inner ring 101 of the hub bearing 1, and a groove is provided on the boss 2012. The aforementioned connecting member 3 is a retaining spring 304, which is embedded in the groove, and a working surface 302 is provided at one end of the retaining spring 304.

[0089] The hub bearing assembly of this embodiment uses a retaining spring 304 with a connecting hole 301 to replace the locking bolt 4, which can reduce the risk of bolt breakage, reduce the procurement inventory cost of standard parts and the process risk of new technology application. In addition, a structure in which the boss 212 cooperates with the retaining spring 304 is provided, and the boss 212 has the same function as described above. The structure is simple, and the retaining spring 304 can be a standard part, which is relatively low in cost.

[0090] Embodiment 4

[0091] This embodiment relates to a drive shaft assembly, which includes at least one wheel hub bearing assembly as described in Embodiments 1 to 3.

[0092] At the same time, this embodiment also relates to a vehicle, on which the drive shaft assembly as described above is provided.

[0093] The drive shaft assembly and the vehicle of this embodiment have the same beneficial effects as the wheel hub bearing assembly in Embodiments 1 to 3 relative to the prior art, and will not be described in detail here.

[0094] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wheel hub bearing assembly, characterized in that: It comprises a wheel hub bearing (1), a ball cage (2) and a connecting piece (3); One end of the hub bearing (1) is provided with a first end face spline; One end of the ball cage (2) is provided with a second end face spline; The connecting member (3) is provided with a connecting hole (301) therein, and a working surface (302) is provided on the connecting member (3). The connecting member (3) is connected to one of the wheel hub bearing (1) and the ball cage (2) through the connecting hole (301), and is pressed against the other of the wheel hub bearing (1) and the ball cage (2) via the working surface (302), so that the wheel hub bearing (1) and the ball cage (2) are pressed against each other, and the first end face spline is connected to the second end face spline.

2. The wheel hub bearing assembly according to claim 1, characterized in that: The connecting member (3) is threadedly connected to the wheel hub bearing (1) through the connecting hole (301); The connecting member (3) is movably arranged on the ball cage (2); The ball cage (2) is provided with a blocking portion (2011), and the blocking portion (2011) is used to prevent the connecting member (3) from detaching from the ball cage (2).

3. The wheel hub bearing assembly according to claim 2, characterized in that: The blocking portion (2011) is a boss provided on the outer shell of the cage (2), and one end of the connecting hole (301) is provided with a bent portion (303) bent inwardly; The boss blocks one side of the bent portion (303), and the working surface (302) is provided at one end of the bent portion (303) facing the boss.

4. The wheel hub bearing assembly according to claim 2, characterized in that: A threaded anti-loosening structure is provided between the connecting piece (3) and the wheel hub bearing (1).

5. The wheel hub bearing assembly according to claim 1, characterized in that: The connecting member (3) is screwed to the ball cage (2) through the connecting hole (301); One end of the ball cage (2) is provided with a protruding column (2012) extending outward, the protruding column (2012) and the second end face spline are located at the same end of the ball cage (2), and the protruding column (2012) is arranged through the inner ring (101) of the wheel hub bearing (1); The connecting member (3) is a nut, the nut is threadedly connected to the boss (2012), and one end of the nut is provided with the working surface (302).

6. The wheel hub bearing assembly according to claim 5, characterized in that: A threaded anti-loosening structure is provided between the connecting piece (3) and the ball cage (2).

7. The wheel hub bearing assembly according to claim 1, characterized in that: One end of the ball cage (2) is provided with a protruding column (2012) extending outward, the protruding column (2012) and the second end face spline are located at the same end of the ball cage (2), the protruding column (2012) is arranged through the inner ring (101) of the wheel hub bearing (1), and a groove is provided on the protruding column (2012); The connecting member (3) is a clip (304), the clip (304) is embedded in the groove, and one end of the clip (304) is provided with the working surface (302).

8. The wheel hub bearing assembly according to claim 5 or 7, characterized in that: A positioning structure is provided between the boss (2012) and the inner ring (101), and when the boss (2012) passes through the inner ring (101), the positioning structure can limit the radial position of the boss (2012) on the inner ring (101).

9. A drive shaft assembly, characterized in that: The drive shaft assembly comprises the wheel hub bearing assembly according to any one of claims 1-8.

10. A vehicle, characterized in that: The vehicle is provided with the drive shaft assembly described in claim 9.

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