Oil-leakage-proof integrated rear axle housing assembly for commercial vehicle
By integrally casting the axle housing rear cover, leaf spring seat and ABS bracket fixing seat and designing the main reducer mounting hole as a blind hole, the problems of poor axle housing rigidity and oil leakage in commercial vehicles are solved, high rigidity and anti-oil leakage effects are achieved, ensuring driving safety.
Patent Information
- Application Number
- CN202422708975.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-11-07
AI Technical Summary
Existing commercial vehicle axle housing structures have problems such as poor rigidity, poor overload performance and easy oil leakage. In particular, axle housings with stamped and welded structures and split cast structures are prone to high-temperature damage to gears and bearings when insufficient lubrication is caused, affecting driving safety.
An overall integrated design is adopted, with the axle housing rear cover, leaf spring seat and ABS bracket fixing seat cast into one piece, and the main reducer mounting hole is designed as a blind hole, which is connected to the axle housing shell by fixing bolts to ensure sealing.
It improves the rigidity and load-bearing capacity of the bridge housing, prevents lubricating oil from leaking, ensures driving safety, and solves the hidden dangers of oil leakage and insufficient rigidity of traditional bridge housing structures.
Smart Images
Figure CN223395999U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rear axle housings for commercial vehicles, in particular to an oil leakage-proof integrally integrated rear axle housing assembly for commercial vehicles. Background Art
[0002] The rear axle is one of the key components of the commercial vehicle axle assembly for carrying and transmitting torque. Its main function is to ensure load-bearing and torque transmission, realize the transmission of longitudinal torque to lateral torque, and realize the differential capability. In addition to load-bearing, lubrication must also be guaranteed. Therefore, the 350 bridge housing is designed as a hollow structure to store lubricating oil inside. At the same time, it must be ensured that the lubricating oil does not leak and that the bridge housing is absolutely sealed.
[0003] At present, commercial vehicle axle housings have stamping and welding structures and casting structures. Stamping and welding structures are suitable for lightweight commercial vehicles, but have poor rigidity and overload performance. Figure 5 、 6 7. The stamped and welded axle housing is primarily welded together by the axle shaft sleeve 1, upper leaf spring seat 2, lower leaf spring seat 3, and rear axle housing cover 4. The main reducer fixing hole 6 on the final reducer mounting surface 5 is a through-hole structure. This through-hole structure is highly susceptible to oil leakage. Furthermore, the axle housing's welding of the axle shaft sleeve 1, upper leaf spring seat 2, lower leaf spring seat 3, and rear axle housing cover 4 results in poor overall structural rigidity and overload resistance.
[0004] Existing cast axle housings have a separate rear cover and axle housing body, secured with bolts with blind holes. This separation and the blind holes create a high risk of oil leakage. If the required lubricant is insufficient to lubricate the transmission system, gears and bearings can overheat and damage, compromising driving safety. Summary of the Invention
[0005] In view of the deficiencies in the existing technology, the technical problem to be solved by the present invention is to provide an oil-leakage-proof integrated rear axle housing assembly for commercial vehicles with high rigidity, good load-bearing performance and better oil-leakage-proof effect.
[0006] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: an oil-leakage-proof integrated rear axle housing assembly for commercial vehicles, including a half-axle sleeve, an axle housing shell and a final reducer mounting surface, the half-axle sleeve and the axle housing shell are connected by fastening screws, a final reducer mounting hole is provided on the final reducer mounting surface, and the final reducer mounting surface is connected to the axle housing shell by fixing bolts, the axle housing shell is integrally cast by an axle housing rear cover, a leaf spring seat and an ABS bracket fixing seat, and the final reducer mounting hole is a blind hole.
[0007] The above-mentioned oil-leakage-proof integrated rear axle housing assembly for commercial vehicles has a main reducer mounting stop size of
[0008] The aforementioned oil-leakage-proof integrated rear axle housing assembly for commercial vehicles has a rear cover of the axle housing that is semicircular.
[0009] The above-mentioned oil-leakage-proof integrated rear axle housing assembly for commercial vehicles has a main reducer installation center height of 70±0.15mm.
[0010] In the aforementioned oil-leakage-proof integrated rear axle housing assembly for commercial vehicles, the size of the fixing bolts is M12-6H.
[0011] In the above-mentioned oil-leakage-proof integrated rear axle housing assembly for commercial vehicles, the main reducer mounting hole is a threaded hole.
[0012] In the aforementioned oil-leakage-proof integrated rear axle housing assembly for commercial vehicles, the main reducer mounting hole distribution circle diameter is 345 mm.
[0013] The aforementioned oil-leakage-proof integrated rear axle housing assembly for commercial vehicles has 12 fixing bolts.
[0014] The beneficial effects of the utility model of the oil-leakage-proof integrated rear axle housing assembly for commercial vehicles are as follows: the utility model improves the rigidity of the axle housing by integrating the axle housing rear cover, the ABS bracket fixing seat and the leaf spring seat as a whole, and at the same time makes the holes of the main reducer mounting surface into blind holes, thereby solving the technical problems of poor rigidity of the existing stamped and welded axle housing and the lack of an integrated rear cover in the traditional cast axle housing, and oil leakage through the main reducer surface mounting holes of the stamped and traditional cast axle housings, and achieving a good oil leakage-proof effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0016] Figure 2 This is a schematic cross-sectional structural diagram of the AA portion of the present invention;
[0017] Figure 3 It is a partial cross-sectional structural schematic diagram of the utility model;
[0018] Figure 4 This is a schematic cross-sectional view of the utility model;
[0019] Figure 5 This is a schematic diagram of the existing stamped and welded bridge shell structure;
[0020] Figure 6 This is a schematic diagram of the cross-sectional structure of the existing stamped and welded bridge housing;
[0021] Figure 7 It is an enlarged view of part C of the present invention. DETAILED DESCRIPTION
[0022] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.
[0023] like Figure 1-7 The figure shows an oil-leakage-proof, integrated rear axle housing assembly for commercial vehicles, comprising axle sleeves 7, an axle housing shell 8, and a final reducer mounting surface 9. In this embodiment, the axle sleeves and the axle housing shell are connected by fastening screws 10. Final reducer mounting surface 9 is provided with final reducer mounting holes 11, which are fixedly connected to the axle housing shell 8 by fixing bolts. In this embodiment, final reducer mounting holes 11 are blind holes, eliminating the potential oil leakage problem associated with through-hole mounting holes in conventional final reducer mounting surfaces.
[0024] The key feature of this embodiment is that the axle housing rear cover 12, leaf spring seat 13, and ABS bracket mounting 14 are integrally cast into the axle housing 8. This effectively addresses the technical issue of the poor rigidity of conventional stamped and welded axle housings. This significantly improves the axle housing's load-bearing capacity while eliminating the potential for lubricant leakage associated with existing technologies. The semicircular shape of the axle housing rear cover 12 in this embodiment effectively ensures smooth lubrication of the lubricant within the axle housing.
[0025] In order to better improve the performance of the utility model, the main reducer installation stop size of the rear axle housing assembly is set to The center height of the rear axle housing assembly's main reducer installation is 70 ± 0.15 mm. Twelve fixing bolts are M12-6H. The main reducer mounting holes 11 are threaded. Except for one with a 15° angle, all other threaded holes on the main reducer mounting surface are evenly spaced. The distribution circle diameter of the main reducer mounting holes 11 is 345 mm.
[0026] The innovations of the present utility model are as follows: first, the final reducer mounting hole 11 of the final reducer mounting surface 9 is set as a blind hole, thereby ensuring that the axle housing is absolutely sealed; second, the axle housing rear cover 12, the leaf spring seat 13 and the ABS bracket fixing seat 14 are integrated as a whole, which greatly improves the load-bearing and torque transmission capacity of the axle housing, thereby ensuring driving safety.
[0027] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the essence of the present invention are intended to be included in the scope of protection of the present invention.
Claims
1. An oil-leakage-proof integrated rear axle housing assembly for commercial vehicles, comprising a half-axle sleeve, an axle housing shell, and a final reducer mounting surface, wherein the half-axle sleeve is connected to the axle housing shell by fastening screws, a final reducer mounting hole is provided on the final reducer mounting surface, and the final reducer mounting surface is connected to the axle housing shell by fixing bolts, characterized in that: The axle housing shell is integrally cast by the axle housing rear cover, the leaf spring seat and the ABS bracket fixing seat, and the main reducer mounting hole is a blind hole.
2. The oil-leakage-proof integrated rear axle housing assembly for commercial vehicles according to claim 1 is characterized by: The size of the main reducer mounting stop of the rear axle housing assembly is Φ315 + 0 0.2 mm.
3. The oil-leakage-proof integrated rear axle housing assembly for commercial vehicles according to claim 2 is characterized by: The bridge housing rear cover is semicircular.
4. The oil-leakage-proof integrated rear axle housing assembly for commercial vehicles according to claim 3 is characterized by: The main reducer installation center height of the rear axle housing assembly is 70±0.15mm.
5. The oil-leakage-proof integrated rear axle housing assembly for commercial vehicles according to claim 4 is characterized by: The size of the fixing bolt is M12-6H.
6. The oil-leakage-proof integrated rear axle housing assembly for commercial vehicles according to claim 5 is characterized by: The main reducer mounting hole is a threaded hole.
7. The oil-leakage-proof integrated rear axle housing assembly for commercial vehicles according to claim 6 is characterized by: The distribution circle diameter of the main reducer mounting holes is 345 mm.
8. The oil-leakage-proof integrated rear axle housing assembly for commercial vehicles according to claim 7 is characterized by: The number of the fixing bolts is 12.