A full-floating rear axle suitable for light passenger vehicles

Abstract

The utility model discloses a full floating rear axle suitable for light passenger vehicle, including drive mechanism, drive axle housing, half axle and wheel hub connecting unit, drive axle housing is located at drive mechanism both sides, and half axle rotates and is located in drive axle housing, and half axle is away from drive mechanism one end and is equipped with wheel hub connecting unit, and wheel hub connecting unit is connected with outside wheel rim, and the inboard of wheel hub connecting unit is equipped with brake disc, and the central position of brake disc is equipped with bearing seat, and bearing seat is equipped with bearing in, and bearing sleeve is connected in the outer periphery of half axle, and the right side of bearing seat is equipped with first flange, and first flange is connected with inboard wheel rim. The utility model has the beneficial effects that: solve the problem that traditional light passenger vehicle half floating rear axle half axle is easy to fatigue, and the problem of fracture is solved, and the durability and reliability are improved, and the brake efficiency and stability, the adaptability of complex working condition are improved, and the integration design of drive mechanism improves the power transmission efficiency, and the demand of light passenger vehicle to load, safety, maintenance and performance is considered as a whole.

Description

Technical Field

[0001] This utility model relates to the field of automotive chassis technology, specifically to a fully floating rear axle suitable for light passenger vehicles. Background Technology

[0002] As a core component of the automobile chassis, the rear axle bears the crucial functions of transmitting power, supporting the weight of the vehicle body, and achieving braking. Its structural form directly affects the vehicle's load-bearing capacity, driving stability, and service life. Currently, automobile rear axles are mainly divided into two types: fully floating and semi-floating.

[0003] The core feature of a fully floating rear axle is that the half-shaft is only responsible for transmitting torque and does not bear the weight of the vehicle body or radial force. The weight of the vehicle is directly transmitted to the wheels through components such as the drive axle housing and bearings. Therefore, the half-shaft is simple to bear, has excellent fatigue resistance, and high reliability. It is widely used in heavy-duty vehicles such as heavy trucks and large buses.

[0004] Light passenger vehicles (referred to as "light buses"), as the main vehicle type for urban logistics, business commuting, and short-distance passenger transport, have long been constrained by cost control and have mostly adopted semi-floating rear axles. The semi-floating rear axle not only transmits power torque but also bears complex loads such as radial forces and bending moments from the vehicle's weight, resulting in a harsh stress state for the semi-floating axle. In actual use, especially during frequent starts and stops, large load fluctuations, or driving in complex road conditions, the semi-floating axle is highly susceptible to fatigue cracks due to stress concentration, and in severe cases, it may even break. This not only increases the frequency and cost of vehicle maintenance but may also lead to traffic accidents.

[0005] Furthermore, with the development of the light commercial vehicle market, users are increasingly demanding higher requirements for vehicle load-bearing capacity, durability, and safety. The shortcomings of existing semi-floating rear axles in terms of load capacity and service life are becoming increasingly apparent: on the one hand, the load-bearing requirements of light commercial vehicles in urban logistics scenarios are constantly increasing, and semi-floating structures are unable to meet the stable operation under long-term heavy loads; on the other hand, business commuting light commercial vehicles have higher requirements for driving smoothness and reliability, and the vibration and abnormal noise caused by the stress on the half-shaft of the semi-floating rear axle also affect the driving experience.

[0006] Therefore, developing a fully floating rear axle that can balance cost and performance, and addressing the shortcomings of semi-floating rear axles in terms of stress rationality, durability, and safety, has become an important direction for the current upgrade of light commercial vehicle chassis technology, taking into account the usage characteristics of light commercial vehicles. Utility Model Content

[0007] The purpose of this invention is to provide a fully floating rear axle suitable for light passenger vehicles, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a fully floating rear axle suitable for light passenger vehicles, comprising a drive mechanism, a drive axle housing, a half-shaft, and a hub connection unit. The drive axle housing is disposed on both sides of the drive mechanism, and the half-shaft is rotatably disposed within the drive axle housing. A hub connection unit is provided at the end of the half-shaft away from the drive mechanism. The hub connection unit is connected to the outer wheel rim. A brake disc is provided inside the hub connection unit, and a bearing seat is provided at the center of the brake disc. A bearing is provided inside the bearing seat, and the bearing is sleeved on the outer circumference of the half-shaft. A first flange is provided on the right side of the bearing seat, and the first flange is connected to the inner wheel rim.

[0009] Preferably, the wheel hub connection unit includes a second flange and a shaft cover. The shaft cover is connected to the first flange by hexagonal socket head caps. The second flange is provided with connecting bolts, which are connected to the outer vehicle rim.

[0010] Preferably, the brake disc is provided with a brake caliper, and the brake caliper is connected to a brake motor.

[0011] Preferably, the drive axle housing has a mounting plate at one end near the brake disc, and the brake caliper is mounted on the mounting plate.

[0012] Preferably, the mounting plate is also provided with a dust cover.

[0013] Preferably, the drive mechanism includes a drive motor and a reduction gearbox, the reduction gearbox being connected to the half-shaft.

[0014] Preferably, the drive axle housing is provided with a leaf spring mounting base.

[0015] Preferably, the drive axle housing is provided with a shock absorber mounting bracket.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model adopts a fully floating structure design, which allows the half-shaft to transmit torque without bearing radial force and bending moment, solving the problem of fatigue and breakage of the half-shaft of the semi-floating rear axle in traditional light passenger vehicles, and improving durability and reliability; the integrated design of the braking system and wheel hub connection unit, combined with a stable installation structure, improves braking efficiency and stability; the combined wheel hub connection unit and leaf spring mounting base facilitate assembly and docking with the chassis, and the dust cover enhances the adaptability to complex working conditions; the integrated design of the drive mechanism improves power transmission efficiency, and the overall design takes into account the needs of light passenger vehicles for load-bearing capacity, safety, maintenance and performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the hub connection unit structure of this utility model;

[0019] Figure 3 This is a schematic diagram showing the connection between this utility model and the automobile chassis.

[0020] In the diagram: 1. Drive mechanism; 2. Drive axle housing; 3. Leaf spring mounting base; 4. Hub connection unit; 5. Brake disc; 6. Bearing housing; 7. First flange; 8. Second flange; 9. Shaft cover; 10. Socket head bolt; 11. Connecting bolt; 12. Brake caliper; 13. Brake motor; 14. Mounting plate; 15. Dust cover; 101. Drive motor; 102. Gearbox; 16. Shock absorber mounting bracket. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1 to 3 This utility model provides a technical solution: a fully floating rear axle suitable for light passenger vehicles, including a drive mechanism 1, a drive axle housing 2, a half shaft and a hub connecting unit 4. The drive axle housing 2 is located on both sides of the drive mechanism 1, and the half shaft is rotatably located inside the drive axle housing 2. The hub connecting unit is located at the end of the half shaft away from the drive mechanism. The hub connecting unit is connected to the outer wheel rim. A brake disc 5 is located inside the hub connecting unit. A bearing seat 6 is located at the center of the brake disc 5. A bearing is located inside the bearing seat 6 and is sleeved on the outer circumference of the half shaft. A first flange 7 is located on the right side of the bearing seat 6 and is connected to the inner wheel rim.

[0023] In one embodiment of this utility model, the wheel hub connection unit includes a second flange 8 and a shaft cover 9. The shaft cover 9 is connected to the first flange 7 by an internal hex bolt 10. The second flange 8 is provided with a connecting bolt 11, which is connected to the outer vehicle steel rim.

[0024] In one embodiment of this utility model, a brake caliper 12 is provided on the brake disc 5, and the brake caliper 12 is connected to a brake motor 13.

[0025] In one embodiment of the present invention, a mounting plate 14 is provided at one end of the drive axle housing 2 near the brake disc 5, and the brake caliper 12 is provided on the mounting plate 14.

[0026] In one embodiment of this utility model, a dust cover 15 is also provided on the mounting plate 14.

[0027] In one embodiment of the present invention, the drive mechanism 1 includes a drive motor 101 and a reduction gearbox 102, the reduction gearbox 102 being connected to the half shaft.

[0028] In one embodiment of this utility model, a leaf spring mounting base 3 is provided on the drive axle housing.

[0029] In one embodiment of this utility model, a shock absorber mounting bracket 16 is provided on the drive axle housing.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fully floating rear axle suitable for light passenger vehicles, characterized in that: The device includes a drive mechanism, a drive axle housing, a half-shaft, and a hub connection unit. The drive axle housing is located on both sides of the drive mechanism. The half-shaft is rotatably located within the drive axle housing. The hub connection unit is located at the end of the half-shaft away from the drive mechanism and is connected to the outer wheel rim. A brake disc is located inside the hub connection unit. A bearing seat is located at the center of the brake disc. A bearing is located inside the bearing seat and is fitted onto the outer circumference of the half-shaft. A first flange is located on the right side of the bearing seat and is connected to the inner wheel rim.

2. The fully floating rear axle for light passenger vehicles according to claim 1, characterized in that: The wheel hub connection unit includes a second flange and a shaft cover. The shaft cover is connected to the first flange by hex bolts. The second flange is provided with connecting bolts, which are connected to the outer vehicle rim.

3. A fully floating rear axle suitable for light passenger vehicles according to claim 2, characterized in that: The brake disc is equipped with a brake caliper, and the brake caliper is connected to a brake motor.

4. A fully floating rear axle suitable for light passenger vehicles according to claim 3, characterized in that: The drive axle housing has a mounting plate at one end near the brake disc, and the brake caliper is mounted on the mounting plate.

5. A fully floating rear axle suitable for light passenger vehicles according to claim 4, characterized in that: The mounting plate is also equipped with a dust cover.

6. A fully floating rear axle suitable for light passenger vehicles according to claim 5, characterized in that: The drive mechanism includes a drive motor and a reduction gearbox, with the reduction gearbox connected to the half-shaft.

7. A fully floating rear axle suitable for light passenger vehicles according to claim 6, characterized in that: The drive axle housing is provided with a leaf spring mounting base.

8. A fully floating rear axle for light passenger vehicles according to claim 7, characterized in that: The drive axle housing is equipped with a shock absorber mounting bracket.

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