Hub bearing assembly of half shaft type
By integrating the wheel hub bearing with the drive half-shaft into a half-shaft structure, and adopting a protective cover and double oil seal design, the assembly complexity and reliability issues of existing wheel hub bearing assemblies are solved, achieving a compact structure, high reliability and strong load-bearing capacity, which is suitable for commercial vehicles.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU HUABO AUTO PARTS
- Filing Date
- 2025-10-23
- Publication Date
- 2026-06-16
AI Technical Summary
Existing wheel hub bearing assemblies are complex in structure, have large assembly errors, are inconvenient to install, and have limited reliability and load-bearing capacity, making it difficult to meet the needs of commercial vehicles.
It adopts a half-shaft structure, integrating the hub bearing with the drive half-shaft. The load distribution is optimized through bearing sleeves and flanges, and it is designed as a compact assembly component. The bearing is protected by a protective cover and double oil seals, and is fixed with lock nuts.
It features a compact structure, high reliability, convenient installation and maintenance, strong load-bearing capacity, and suitability for commercial vehicles.
Smart Images
Figure CN224360928U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of wheel hub bearing units, specifically to a wheel hub bearing assembly with a half-shaft structure. Background Technology
[0002] The wheel bearing assembly is a key component of the automotive drive axle system. Its main functions are to support the vehicle's weight, transmit torque, and ensure smooth wheel rotation. The traditional structure is as follows:
[0003] Split-type bearings: Early automobiles often used a combination of two sets of single-row tapered roller bearings or ball bearings, which required adjusting clearance, lubricating, and sealing during assembly, making the process complex and resulting in lower reliability. Traditional split-type structures require on-site adjustment of clearance and sealing, which can easily lead to assembly errors.
[0004] Semi-floating and fully floating half-shafts:
[0005] Fully floating half-shaft: It only transmits torque and does not bear bending moment. The hub is mounted on the axle housing through two tapered roller bearings, which is convenient for disassembly and assembly and is widely used in commercial vehicles.
[0006] Semi-floating half-shaft: It can transmit torque and withstand bending moment. It has a simple structure but limited load-bearing capacity and is inconvenient to disassemble and assemble. It is mostly used in light vehicles. Summary of the Invention
[0007] This utility model mainly addresses the shortcomings of existing technologies by providing a half-shaft type wheel hub bearing assembly, which features a compact structure, high reliability, convenient installation and maintenance, and strong load-bearing capacity. By adopting a half-shaft structure and optimizing load distribution through bearing sleeves and flanges, the traditional wheel hub bearing unit is integrated and optimized with the transmission half-shaft, forming a compact, easy-to-install, and highly reliable assembly.
[0008] The above-mentioned technical problems of this utility model are mainly solved by the following technical solutions:
[0009] A hub bearing assembly with a half-shaft structure includes a drive axle, with hubs on both sides of the drive axle. A drive half-shaft is provided between the hubs and the drive axle, and a hub bearing assembly is provided between the hubs and the drive half-shaft. The hub bearing assembly includes a hub flange that is inserted and fixed to the drive half-shaft. A bearing sleeve that engages with the drive half-shaft is provided between the hub flange and the drive axle. A bearing that is nested between the bearing sleeve and the drive half-shaft, and the bearing sleeve and the drive half-shaft, are also provided.
[0010] Preferably, a protective cover is provided between the hub flange and the bearing sleeve, and the hub flange and the protective cover are provided between the hub flange and the protective cover, and between the drive half shaft and the bearing sleeve, and oil seals are provided at both ends of the bearing.
[0011] Preferably, the outer side of the hub flange is provided with a locking nut that is threadedly connected to the drive half shaft, and a gasket that is connected to the drive half shaft is provided between the locking nut and the hub flange.
[0012] Preferably, the transmission half-shaft is provided with a limiting key that is engaged with the hub flange.
[0013] Preferably, the hub flange and the hub are connected and fixed using a bolt and nut structure.
[0014] This invention can achieve the following effects:
[0015] This utility model provides a wheel hub bearing assembly with a half-shaft structure, which, compared with the prior art, features a compact structure, high reliability, convenient installation and maintenance, and strong load-bearing capacity. By adopting a half-shaft structure and optimizing load distribution through bearing sleeves and flanges, the traditional wheel hub bearing unit is integrated and optimized with the transmission half-shaft, forming a compact, easy-to-install, and highly reliable assembly.
[0016] Compact structure: The bearings, flanges, oil seals and other components are integrated into one assembly, which facilitates overall installation and replacement.
[0017] High reliability: The "protective cover + double oil seal" design effectively protects the bearing; the spline is used to transmit torque and the locking nut is used for axial fixation, making the connection firm and reliable.
[0018] Easy installation and maintenance: The modular design allows for quick replacement of the entire assembly during vehicle repairs, shortening repair time.
[0019] High load-bearing capacity: This type of half-axle structure is typically used in commercial vehicles or heavy vehicles that need to withstand large loads, and its design concept meets the needs of heavy-duty applications. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model.
[0021] Figure 2 This is a structural cross-sectional view of the wheel hub bearing assembly in this utility model.
[0022] In the diagram: 1. Wheel hub, 2. Wheel hub bearing assembly, 3. Drive half shaft, 4. Drive axle, 5. Gasket, 6. Lock nut, 7. Wheel hub flange, 8. Bearing sleeve, 9. Oil seal, 10. Bearing, 11. Protective cover, 12. Limit key. Detailed Implementation
[0023] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.
[0024] Example: Figure 1 and Figure 2 As shown, a half-shaft type wheel hub bearing assembly includes a drive axle 4, with wheel hubs 1 on both sides of the drive axle 4. A drive half-shaft 3 is located between the wheel hubs 1 and the drive axle 4, and a wheel hub bearing assembly 2 is located between the wheel hubs 1 and the drive half-shaft 3. The wheel hub bearing assembly 2 includes a wheel hub flange 7, which is splinedly inserted and fixed to the drive half-shaft 3. The wheel hub flange 7 and the wheel hub 1 are connected and fixed by a bolt and nut structure. A limiting key 12 is provided on the drive half-shaft 3, which is snap-fitted into the wheel hub flange 7. A locking nut 6 is provided on the outside of the wheel hub flange 7, which is threadedly sleeved on the drive half-shaft 3. A gasket 5 is provided between the locking nut 6 and the wheel hub flange 7, which is sleeved on the drive half-shaft 3. A bearing sleeve 8, which is fitted onto the drive axle 4, is provided between the hub flange 7 and the drive axle 4. A protective cover 11, which is flange-connected and fixed to the bearing sleeve 8, is provided between the hub flange 7 and the bearing sleeve 8. Oil seals 9 are located at both ends of the bearing 10 between the hub flange 7 and the protective cover 11, and between the drive axle 3 and the bearing sleeve 8. A bearing 10, which is nested between the bearing sleeve 8 and the drive axle 3, is provided between the drive axle 3 and the bearing sleeve 8.
[0025] The workflow is as follows:
[0026] Power input: The power of the engine / motor is transmitted to the drive half shaft 3 via the drive axle 4.
[0027] Torque transmission: The drive half-shaft 3 transmits torque to the wheel hub flange 7 via a splined connection with the wheel hub flange 7.
[0028] Drive wheel: The hub flange 7 is rigidly connected to the hub 1 (and the brake disc and wheel fixed on the hub) through a bolt and nut structure, thereby driving the wheel to rotate.
[0029] Rotary support: The entire rotating part (hub, flange, drive shaft) is stably supported on the fixed bearing sleeve 8 by the bearing 10, and the bearing sleeve 8 is fixed relative to the drive axle (4).
[0030] In summary, this half-shaft type wheel hub bearing assembly features a compact structure, high reliability, convenient installation and maintenance, and strong load-bearing capacity. By adopting a half-shaft structure and optimizing load distribution through bearing sleeves and flanges, the traditional wheel hub bearing unit is integrated and optimized with the drive half-shaft, forming a compact, easy-to-install, and highly reliable assembly.
[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0032] In summary, the above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.
Claims
1. A half-shaft type wheel hub bearing assembly, comprising a drive axle (4), wherein wheel hubs (1) are provided on both sides of the drive axle (4), characterized in that: A transmission half-shaft (3) is provided between the wheel hub (1) and the drive axle (4), and a wheel hub bearing assembly (2) is provided between the wheel hub (1) and the transmission half-shaft (3); the wheel hub bearing assembly (2) includes a wheel hub flange (7) that is inserted and fixed to the transmission half-shaft (3), a bearing sleeve (8) that is sleeved with the transmission half-shaft (3) is provided between the wheel hub flange (7) and the drive axle (4), and a bearing (10) that is nested between the bearing sleeve (8) and the transmission half-shaft (3) and the bearing sleeve (8).
2. The wheel hub bearing assembly with a half-shaft structure according to claim 1, characterized in that: The hub flange (7) and the bearing sleeve (8) are provided with a protective cover (11) that is fixed to the bearing sleeve (8) in a flange-type connection. The hub flange (7) and the protective cover (11) and the transmission half shaft (3) and the bearing sleeve (8) are provided with oil seals (9) located at both ends of the bearing (10).
3. The wheel hub bearing assembly with a half-shaft structure according to claim 1, characterized in that: The outer side of the hub flange (7) is provided with a locking nut (6) that is threadedly connected to the drive half shaft (3), and a gasket (5) that is connected to the drive half shaft (3) is provided between the locking nut (6) and the hub flange (7).
4. The wheel hub bearing assembly with a half-shaft structure according to claim 1, characterized in that: The transmission half-shaft (3) is provided with a limiting key (12) that is interlocked with the hub flange (7).
5. The wheel hub bearing assembly with a half-shaft structure according to claim 1, characterized in that: The hub flange (7) and the hub (1) are connected and fixed by bolts and nuts.