A front drive axle assembly wheel end self-sealing device

Abstract

The utility model provides a kind of front drive axle assembly wheel end self-sealing device, it is characterized by: it includes the end portion of intermediate transmission shaft one end is equipped with self-locking nut and connecting sleeve in turn, wheel edge transmission shaft is inserted in one end of connecting sleeve, bearing and dust cover are in turn equipped with on connecting sleeve, corresponding matching wheel end sleeve is equipped with on the outside of bearing, corresponding matching oil seal is equipped between dust cover and wheel end sleeve.The utility model is simple in structure, convenient to use, avoid because wheel edge transmission shaft running process causes the problem of oil leakage of oil seal caused by the gap between dust cover and dustproof lip on wheel edge transmission shaft, because transmission shaft and adapter sleeve are split type, reduce processing difficulty, reduce processing cost and improve quality coefficient.

Description

Technical Field

[0001] This utility model relates to the field of automotive technology, specifically to a self-sealing device for the wheel ends of a front drive axle assembly. Background Technology

[0002] With the increasing popularity of pickup trucks in urban areas and the growing acceptance of them in the export market, pickup truck sales have been steadily rising. Four-wheel drive systems can provide pickups with greater power. To highlight the superiority of their products and quickly capture the high-end market, customers have actively developed four-wheel drive systems, including the front drive axle assembly. This assembly enables part-time drive for the entire vehicle, increasing torque based on operating conditions to deliver greater power. When developing this front drive axle assembly, the selection of the fixing and connection structure between its various components is particularly important.

[0003] Due to the overall vehicle layout, an intermediate driveshaft needs to be added on the main reducer side of the front axle to ensure consistent distances from both sides of the interface to the wheel ends. Currently, the driveshaft in front-drive axle assemblies both domestically and internationally is an integral structure, meaning one side is connected to the main reducer via internal splines, and the other side is connected to the wheel-side driveshaft via internal splines. With increased power, the structural strength of this integral output shaft needs to be improved, and manufacturing costs also increase dramatically.

[0004] Currently, front-drive axle assemblies, both domestically and internationally, typically connect to the wheel-side drive shaft via oil seals. Therefore, under harsh operating conditions, this can lead to significant radial runout of the wheel-side drive shaft and excessive bearing movement, ultimately causing oil leakage from the wheel-side oil seals. Utility Model Content

[0005] The present invention aims to overcome the shortcomings of the prior art by providing a self-sealing device for the wheel ends of a front drive axle assembly.

[0006] This application provides the following technical solution:

[0007] A self-sealing device for the wheel end of a front drive axle assembly is characterized in that: it includes a self-locking nut and a connecting sleeve sequentially fitted at one end of an intermediate drive shaft, a wheel-side drive shaft inserted into one end of the connecting sleeve, a bearing and a dust cover sequentially fitted on the connecting sleeve, a corresponding wheel end sleeve fitted on the outside of the bearing, and a corresponding oil seal between the dust cover and the wheel end sleeve.

[0008] Based on the above technical solutions, the following further technical solutions are also possible:

[0009] A corresponding retaining ring is provided between the connecting sleeve and the wheel-side drive shaft.

[0010] An elastic retaining ring is provided on one side of the bearing to correspond to and cooperate with the wheel end sleeve.

[0011] A raised ring is provided on the connecting sleeve between the bearing and the dust cover.

[0012] Advantages of the utility model:

[0013] This utility model has a simple structure and is easy to use. It avoids the problem of oil leakage caused by gaps between the dust cover on the wheel-side drive shaft and the dust lip of the oil seal due to the lateral movement of the wheel-side drive shaft during operation. Since the drive shaft and the adapter sleeve are separate, the processing difficulty is reduced, the processing cost is reduced, and the quality coefficient is improved. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0015] like Figure 1 As shown, a self-sealing device for the wheel ends of a front drive axle assembly includes a self-locking nut 2 and a connecting sleeve 5 sequentially fitted onto one end of an intermediate drive shaft 1. A limiting shoulder 1a corresponding to the connecting sleeve 5 is provided at one end of the intermediate drive shaft 1. A sealing adhesive layer is applied at the splined interface between the intermediate drive shaft and the connecting sleeve.

[0016] A wheel-side drive shaft 7 is inserted into one end of the connecting sleeve 5, and an annular retaining spring 8, which corresponds to and mates with the inner wall of the connecting sleeve 5, is installed at the inserted end of the wheel-side drive shaft 7. This enables the intermediate drive shaft 1 to be connected to the wheel-side drive shaft 7 through the connecting sleeve 5.

[0017] A convex ring 5a extends outward from the middle of the outer wall of the connecting sleeve 5. A bearing 4 is fitted onto the outer wall of the connecting sleeve 5 on one side of the convex ring 5a, and a corresponding wheel end sleeve 3 is fitted onto the outside of the bearing 4. A dust cover 9 is fitted onto the outer wall of the connecting sleeve 5 on the other side of the convex ring 5a. The dust cover 9 has an L-shaped cross-section. An oil seal 6 is fitted onto the outside of the dust cover 9, which corresponds to the inner wall of the wheel end sleeve 3.

[0018] An elastic retaining ring 10 is fitted on one side of the bearing 4, which corresponds to and fits the inner wall of the wheel end sleeve 3.

Claims

1. A self-sealing device for wheel ends of a front drive axle assembly, characterized in that: It includes a self-locking nut (2) and a connecting sleeve (5) sequentially fitted at one end of an intermediate drive shaft (1), a wheel-side drive shaft (7) inserted at one end of the connecting sleeve (5), a bearing (4) and a dust cover (9) sequentially fitted on the connecting sleeve (5), a corresponding matching wheel end sleeve (3) fitted on the outside of the bearing (4), and a corresponding matching oil seal (6) between the dust cover (9) and the wheel end sleeve (3).

2. The self-sealing device for the wheel ends of a front drive axle assembly according to claim 1, characterized in that: A corresponding snap ring (8) is provided between the connecting sleeve (5) and the wheel-side drive shaft (7).

3. The self-sealing device for the wheel ends of a front drive axle assembly according to claim 1, characterized in that: An elastic retaining ring (10) is provided on one side of the bearing (4) to cooperate with the wheel end sleeve (3).

4. The self-sealing device for the wheel ends of a front drive axle assembly according to claim 1, characterized in that: A raised ring (5a) is provided on the connecting sleeve (5) between the bearing (4) and the dust cover (9).

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