A maintenance-free wheel hub assembly

Abstract

The application discloses a maintenance-free wheel hub assembly and belongs to the technical field of automobile wheel hubs. The wheel hub assembly comprises a wheel hub body, a bearing body, and an interference fit is arranged in the center hole of the bearing body. The bearing body is used for effectively transmitting the radial load and the axial load of the wheel hub body and a vehicle to an axle, so that the stable rotation of the wheel hub body around the axle is realized. Through the optimization of the structural design, the interference fit of the outer sealing ring and the bearing outer ring and the interference fit of the inner sealing ring and the bearing inner ring, the combination of the insertion ring and the groove, the elimination of the transverse movement during operation, the guarantee of the stable engagement relationship and the non-separation, the further fixation of the position of the sealing assembly by the end cover limiting groove, the avoidance of the installation positioning deviation, the reinforcement of the sealing reliability, the synergistic effect of the double sealing and the multiple limiting, the solution of the problems of the leakage of the lubricating grease and the invasion of the impurities, and the frequent maintenance, the maintenance-free wheel hub assembly is provided.

Description

Technical Field

[0001] This application relates to the field of automotive wheel hub technology, and more specifically, to a maintenance-free wheel hub assembly. Background Technology

[0002] As a key component of a vehicle's driving system, the performance of the wheel hub directly affects the vehicle's driving safety and stability. A traditional wheel hub assembly typically includes components such as the wheel hub body, bearings, oil seals, and dust covers. Among these, the bearings, as the core rotating component, require regular lubrication with grease. Simultaneously, the sealing performance of the oil seals must be checked to prevent grease leakage and the entry of external impurities.

[0003] However, traditional wheel hub assemblies often use a single sealing structure for their sealing components. During installation, the seal positioning is prone to deviation, and during operation, the lack of effective limiting causes lateral movement, resulting in seal separation, grease leakage, and impurity intrusion. At the same time, the fit between the sealing component and the bearing ring is not stable enough, and the meshing clearance is prone to increase or separation during rotation, leading to seal failure. Frequent disassembly and maintenance are required to replace the seal and replenish the grease, which not only increases labor costs but also seriously affects vehicle operating efficiency and even poses safety hazards. Utility Model Content

[0004] The purpose of this application is to provide a maintenance-free wheel hub assembly that can effectively solve the problem of positioning deviation of the seals during use in the prior art, and achieve the effect of stable positioning of the sealing components.

[0005] This application provides a maintenance-free wheel hub assembly, including a wheel hub body; The bearing body is interference-fitted into the center hole of the bearing body to effectively transfer the radial and axial loads of the wheel hub body and the vehicle to the axle, so as to realize the stable rotation of the wheel hub body around the axle. The sealing component is installed at one end of the bearing body to prevent the lubricating oil inside the bearing body from leaking out, and at the same time to prevent dust and other impurities in the air from entering the lubrication cavity of the bearing body. An end cap is fixed to the end of the hub body and presses the sealing assembly together.

[0006] Through the above technical solution, the sealing assembly, through the interference fit between the outer sealing ring and the outer ring of the bearing, and the inner sealing ring and the inner ring of the bearing, combined with the fitting and limiting of the insert ring and the groove, prevents lateral movement during operation and ensures a stable meshing relationship without separation. The end cover limiting groove further fixes the position of the sealing assembly, avoids installation positioning deviation, and enhances sealing reliability. The synergistic effect of double sealing and multiple limiting solves the problems of grease leakage and impurity intrusion, eliminating the need for frequent maintenance.

[0007] The present invention is further configured such that the bearing body includes an outer ring, an inner ring is disposed in the middle of the outer ring, a cage is disposed between the outer ring and the inner ring, rolling elements are arranged in an array within the cage, and the outer ring is interference-fitted into the center hole of the hub body.

[0008] The present invention is further configured such that the sealing assembly includes an outer sealing ring, a first extension ring is provided at the lower end of the outer sealing ring, a groove is provided at the upper end of the outer sealing ring, an inner sealing ring is provided in the middle of the outer sealing ring, a second extension ring is provided at the lower end of the inner sealing ring, and an insert ring is provided at the upper end of the inner sealing ring. The insert ring is located in the groove, and both the first extension ring and the second extension ring are connected to the bearing body.

[0009] The present invention is further configured such that the outer wall of the first extension ring is interference-fitted with the inner ring, and the outer wall of the second extension ring is interference-fitted with the inner wall of the outer ring.

[0010] The present invention is further configured such that the end cap is fixedly connected to the hub body by an array of bolts, one end of the end cap is provided with a limiting groove for limiting the sealing component, the upper ends of the outer sealing ring and the inner sealing ring are in contact with the end cap, and the end cap is provided with a through array of holes.

[0011] The beneficial effects of this utility model are as follows: By optimizing the structural design, the sealing assembly, through the interference fit between the outer sealing ring and the outer ring of the bearing, and the inner sealing ring and the inner ring of the bearing, combined with the fitting and limiting of the insert ring and the groove, prevents lateral movement during operation and ensures a stable meshing relationship without separation. The end cover limiting groove further fixes the position of the sealing assembly, avoids installation positioning deviation, and enhances sealing reliability. The synergistic effect of double sealing and multiple limiting solves the problems of grease leakage and impurity intrusion, eliminating the need for frequent maintenance.

[0012] The installation process is simple and orderly, with precise positioning, which reduces assembly difficulty, improves assembly efficiency, extends the service life of the wheel assembly, significantly reduces usage and maintenance costs, and ensures the safety and continuity of vehicle operation. Attached Figure Description

[0013] Figure 1 This is a first-view structural diagram of a maintenance-free wheel hub assembly according to this utility model; Figure 2 This is a partial structural diagram of a maintenance-free wheel hub assembly according to this utility model; Figure 3 This is a partial structural burst drawing of a maintenance-free wheel hub assembly according to this utility model; Figure 4 This is an exploded view of the sealing component of a maintenance-free wheel hub assembly according to this utility model; Figure 5This is a schematic diagram of the end cap of a maintenance-free wheel hub assembly according to this utility model.

[0014] The following are the labels in the diagram: 1. Hub body; 2. Bearing body; 21. Outer ring; 22. Inner ring; 23. Cage; 24. Rolling element; 3. Sealing assembly; 31. Outer seal ring; 311. First extension ring; 312. Groove; 32. Inner seal ring; 321. Second extension ring; 322. Insert ring; 4. End cap; 41. Limiting groove; 42. Hole. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0016] like Figures 1-5 As shown, a maintenance-free wheel hub assembly in this embodiment includes a wheel hub body 1.

[0017] It also includes a bearing body 2, which is interference-fitted into the center hole of the bearing body 2, and is used to effectively transfer the radial and axial loads of the hub body 1 and the vehicle to the axle, so as to realize the stable rotation of the hub body 1 around the axle. The bearing body 2 includes an outer ring 21, an inner ring 22 is provided in the middle of the outer ring 21, a cage 23 is provided between the outer ring 21 and the inner ring 22, and rolling elements 24 are arranged in an array in the cage 23. The outer ring 21 is interference-fitted into the center hole of the hub body 1.

[0018] It also includes a sealing component 3, which is installed at one end of the bearing body 2 to prevent the lubricating oil in the bearing body 2 from leaking out, and at the same time to prevent dust and other impurities in the air from entering the lubrication cavity of the bearing body 2. The sealing component 3 includes an outer sealing ring 31, a first extension ring 311 at the lower end of the outer sealing ring 31, a groove 312 at the upper end of the outer sealing ring 31, an inner sealing ring 32 in the middle of the outer sealing ring 31, a second extension ring 321 at the lower end of the inner sealing ring 32, and a retaining ring 322 at the upper end of the inner sealing ring 32. The retaining ring 322 is located in the groove 312. Both the first extension ring 311 and the second extension ring 321 are connected to the bearing body 2. The outer wall of the first extension ring 311 is interference-fitted with the inner ring 22, and the outer wall of the second extension ring 321 is interference-fitted with the inner wall of the outer ring 21. The center hole of the inner sealing ring 32 is consistent with the center hole of the bearing body 2.

[0019] The sealing assembly 3, through the interference fit between the outer sealing ring 31 and the outer ring 21 of the bearing, and the inner sealing ring 32 and the inner ring 22 of the bearing, combined with the fitting and limiting of the insert ring 322 and the groove 312, prevents the sealing assembly 3 from moving laterally during operation, ensuring a stable meshing relationship without separation. This prevents the loss of lubricating oil in the bearing body 2, which in turn allows external dust and other impurities to enter the bearing body 2, affecting the stable operation of the bearing body 2.

[0020] It also includes an end cap 4, which is fixed to the end of the hub body 1 and presses the sealing assembly 3. The end cap 4 is fixedly connected to the hub body 1 by an array of bolts. One end of the end cap 4 is provided with a limiting groove 41 for limiting the sealing assembly 3. The upper ends of the outer sealing ring 31 and the inner sealing ring 32 are in contact with the end cap 4. The end cap 4 is provided with a through array of holes 42. The limiting groove 41 of the end cap 4 further fixes the position of the sealing assembly 3, avoids installation positioning deviation, and enhances sealing reliability. The double sealing and multiple limiting work together to solve the problems of grease leakage and impurity intrusion, eliminating the need for frequent maintenance and reducing labor costs.

[0021] The overall installation process is simple and orderly, with precise positioning, reducing assembly difficulty, improving assembly efficiency, extending the service life of the wheel assembly, significantly reducing usage and maintenance costs, and ensuring the safety and continuity of vehicle operation.

[0022] The working principle of this utility model is as follows: When installing this device, firstly, the bearing body 2 is installed inside the wheel hub body 1. Then, the end of the bearing body 2 away from the end cover 4 is sealed with a sealing component 3, and this end is securely installed with an end cover 4 having mounting holes. Then, the installed device is installed on the automobile axle. When the sealing component 3 is installed near the end cover 4, the outer wall of the first extension ring 311 of the outer sealing ring 31 is press-fitted with the inner wall of the outer ring 21 of the bearing body 2, and the outer wall of the second extension ring 321 of the inner sealing ring 32 is press-fitted with the inner wall of the inner ring 22 of the bearing body 2. The inner sealing ring 32 is fitted over the outer sealing ring 31. At this time, the insert ring 322 of the inner sealing ring 32 is located in the groove 312 of the outer sealing ring 31, and the interaction restricts its lateral displacement. Finally, the end cover 4 is installed on the wheel hub body 1 with bolts. The sealing component 3 is located in the limiting groove 41 provided on one side of the end cover 4, which further restricts the position of the sealing component 3 and prevents the sealing component 3 from failing during operation.

[0023] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A maintenance-free wheel hub assembly, characterized in that, include: Wheel hub body (1); The bearing body (2) is interference-fitted into the center hole of the bearing body (2) to effectively transfer the radial and axial loads of the hub body (1) and the vehicle to the axle, thereby achieving stable rotation of the hub body (1) around the axle. The sealing component (3) is installed at one end of the bearing body (2) to prevent the lubricating oil in the bearing body (2) from leaking out, and at the same time to prevent dust and other impurities in the air from entering the lubrication cavity of the bearing body (2). End cap (4), which is fixed to the end of the hub body (1) and presses the sealing assembly (3) together.

2. The maintenance-free wheel hub assembly according to claim 1, characterized in that: The bearing body (2) includes an outer ring (21), an inner ring (22) is provided in the middle of the outer ring (21), a cage (23) is provided between the outer ring (21) and the inner ring (22), and rolling elements (24) are arranged in an array in the cage (23). The outer ring (21) is interference-fitted into the center hole of the hub body (1).

3. The maintenance-free wheel hub assembly according to claim 2, characterized in that: The sealing assembly (3) includes an outer sealing ring (31), a first extension ring (311) is provided at the lower end of the outer sealing ring (31), a groove (312) is provided at the upper end of the outer sealing ring (31), an inner sealing ring (32) is provided in the middle of the outer sealing ring (31), a second extension ring (321) is provided at the lower end of the inner sealing ring (32), and a retainer ring (322) is provided at the upper end of the inner sealing ring (32). The retainer ring (322) is located in the groove (312), and both the first extension ring (311) and the second extension ring (321) are connected to the bearing body (2).

4. The maintenance-free wheel hub assembly according to claim 3, characterized in that: The outer wall of the first extension ring (311) is interference-fitted with the inner ring (22), and the outer wall of the second extension ring (321) is interference-fitted with the inner wall of the outer ring (21).

5. A maintenance-free wheel hub assembly according to claim 3, characterized in that: The end cap (4) is fixedly connected to the hub body (1) by bolts arranged in an array. One end of the end cap (4) is provided with a limiting groove (41) for limiting the sealing assembly (3). The upper ends of the outer sealing ring (31) and the inner sealing ring (32) are in contact with the end cap (4). The end cap (4) is provided with holes (42) arranged in an array.

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