Drive axle speed reducer shell and main speed reducer assembly

Abstract

The invention belongs to the technical field of automobile parts, and particularly relates to a drive axle speed reducer shell and a main speed reducer assembly. A drive axle speed reducer shell comprises a shell body, a guide bearing seat is fixed in the shell body, a plurality of longitudinally-arranged reinforcing ribs A are fixed on the inner wall of the shell body between the upper side face of a guide bearing seat supporting face of the guide bearing seat and the lower surface of an upper flange face, the reinforcing ribs A extend in the axial direction, and the two ends of each reinforcing rib A are fixed on the guide bearing seat and the upper flange face respectively. Compared with the prior art, the bearing seat has the technical effects that the reinforcing ribs extend to the upper flange face from the bearing seat supporting face, the reinforcing ribs are optimized to be connected with a differential bearing hole and a reducer shell, the rigidity of the reducer shell is improved, deformation of a guide bearing hole when a gear is loaded is reduced, the reverse dragging torque of a main reducer is improved, and meanwhile the transmission error of the gear is reduced; and the NVH performance is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile parts, and specifically relates to a drive axle reducer housing and a main reducer assembly. Background Art

[0002] The reducer housing is an important automotive component technology. For example, patent document CN205244308U discloses a new lightweight main reducer housing.

[0003] like Figure 4 The upper side surface (the side close to the upper flange surface 1) of the guide bearing seat support surface 5 of the guide bearing seat 6 is fixed with a reinforcing rib 10-1 to improve the rigidity.

[0004] Technical problem: Currently the stiffness of the reducer housing cannot meet the design requirements. Summary of the invention

[0005] The technical problem to be solved by the present invention is: how to design a drive axle reducer housing and a main reducer assembly to improve the rigidity of the reducer housing.

[0006] The technical solution of the present invention is specifically as follows: A drive axle reducer housing includes a housing, a guide bearing seat is fixed in the housing, a plurality of longitudinally arranged reinforcing ribs A are fixed on the inner wall of the housing between the upper side surface of the guide bearing seat support surface and the lower surface of the upper flange surface, the reinforcing ribs A extend along the axial direction, and the two ends thereof are respectively fixed on the guide bearing seat and the upper flange surface.

[0007] The number of screw holes A on the upper flange surface is 2n, where n is a natural number, the number of reinforcing ribs A is n, and the reinforcing ribs A are located between two adjacent screw holes A.

[0008] Two symmetrical differential bearing mounting components are fixed on the housing, and the differential bearing mounting components include two vertical load-bearing columns, and a semi-annular differential bearing mounting platform is arranged between the two load-bearing columns. The housing is fixed by three reinforcing ribs B below the differential bearing mounting platform, and the load-bearing columns fix the housing by reinforcing ribs C, and the reinforcing ribs C are located in the opposite direction of the differential bearing mounting platform.

[0009] A positioning pin hole is arranged on the upper flange surface.

[0010] A drive main reducer assembly includes the above-mentioned drive axle reducer housing. When the upper flange surface of the drive axle reducer housing is installed with the main cone bearing seat, the locating pin passes through the locating pin hole on the main cone bearing seat and the locating pin hole on the upper flange surface.

[0011] Compared with the prior art, the technical effect of the present invention is that the reinforcing ribs provided in the present invention extend from the bearing seat support surface to the upper flange surface, optimizing the reinforcing ribs to connect the differential bearing hole and the reducer shell, improving the reducer shell stiffness, reducing the deformation of the guide bearing hole when the gear is loaded, and improving the back-drag torque of the main reducer, while reducing the transmission error of the gear and improving the NVH performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional schematic diagram of the present invention (I).

[0013] Figure 2 It is a three-dimensional schematic diagram (II) of the present invention.

[0014] Figure 3 It is a schematic diagram of the present invention.

[0015] Figure 4 Schematic diagram of prior art patent literature. DETAILED DESCRIPTION

[0016] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments thereof.

[0017] like Figure 1-2 A drive axle reducer housing includes a housing 10, a guide bearing seat 23 is fixed in the housing 10, and a plurality of longitudinally arranged reinforcing ribs A24 are fixed on the inner wall of the housing 10 between the upper side surface of the guide bearing seat support surface of the guide bearing seat 23 and the lower surface of the upper flange surface 20. The reinforcing ribs A24 extend along the axial direction, and the two ends thereof are respectively fixed on the guide bearing seat 23 and the upper flange surface 20.

[0018] In this way, the two ends and one side of the reinforcing rib A24 are fixed on the housing 10, so that the guide bearing seat 23, the upper flange surface 20, and the reinforcing rib A24 form a three-dimensional structure, which can be related and involved in the longitudinal and transverse directions, thereby enhancing the rigidity of the reducer housing.

[0019] The number of screw holes A21 on the upper flange surface 20 is 2n, where n is a natural number. The number of reinforcing ribs A24 is n, and the reinforcing rib A24 is located between two adjacent screw holes A21.

[0020] like Figure 1-2 Two symmetrical differential bearing mounting components are fixed on the housing 10, and the differential bearing mounting components include two vertical load-bearing columns 30. A semi-annular differential bearing mounting platform 31 is provided between the two load-bearing columns 30. The housing 10 is fixed below the differential bearing mounting platform 31 by three reinforcing ribs B32. The load-bearing columns 30 fix the housing 10 by reinforcing ribs C33. The reinforcing ribs C33 are located in the opposite direction of the differential bearing mounting platform 31.

[0021] In this way, the load-bearing column 30, the differential bearing mounting platform 31, the reinforcing ribs B32 and C33 are similar to the structure of a suspension bridge, the structure is relatively stable, and the rigidity of the reducer housing is enhanced.

[0022] During installation, the main cone bearing seat and other parts are not easy to align, so the improvements are as follows: like Figure 1 A locating pin hole 25 is provided on the upper flange surface 20. When the upper flange surface 20 and the main cone bearing seat are installed, the locating pin passes through the locating pin hole on the main cone bearing seat and the locating pin hole 25 on the upper flange surface 20.

[0023] A drive axle reducer assembly includes the above-mentioned drive axle reducer housing. When the upper flange surface 20 of the drive axle reducer housing is installed with the main cone bearing seat, the locating pin passes through the locating pin hole on the main cone bearing seat and the locating pin hole 25 on the upper flange surface 20.

[0024] A pin hole 41 is provided on the lower flange surface 40 of the housing 10 .

[0025] Features of this application: S1. The main reducer housing is newly designed. By optimizing the reinforcing ribs connecting the guide bearing seat and the upper surface bolt holes, and optimizing the reinforcing ribs connecting the differential bearing holes and the reducer housing, the reducer housing stiffness is improved, the deformation of the guide bearing holes when the gears are loaded is reduced, the anti-drag torque of the main reducer is increased, and the transmission error of the gears is reduced, thereby improving the NVH performance.

[0026] NVH performance: refers to the noise, vibration and harshness generated by a car during driving, and is an important indicator for measuring the comfort and quality of a car. NVH performance not only affects the user's riding experience, but also directly reflects the manufacturing process and quality level of the car. S2. The differential bearing hole is connected to the housing body through annular ribs to reduce the deformation of the differential bearing hole position when loaded and improve NVH performance.

[0027] S3. The main reducer housing and the main cone bearing seat are positioned by locating pins and fastened by bolts, which reduces the housing offset distance error caused by the shaft hole matching clearance and improves the installation accuracy of the main and driven bevel gears.

[0028] For other contents, please refer to the prior art.

[0029] The above description is only the preferred implementation mode of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, which should also be regarded as the protection scope of the present invention.

Claims

1. A drive axle reducer housing, comprising a housing (10), a guide bearing seat (23) fixed inside the housing (10), characterized in that: A plurality of longitudinally arranged reinforcing ribs A (24) are fixed on the inner wall of the housing (10) between the upper side surface of the guide bearing seat support surface of the guide bearing seat (23) and the lower surface of the upper flange surface (20). The reinforcing ribs A (24) extend in the axial direction, and two ends thereof are respectively fixed on the guide bearing seat (23) and the upper flange surface (20).

2. The drive axle reducer housing according to claim 1, characterized in that: The number of screw holes A (21) on the upper flange surface (20) is 2n, where n is a natural number. The number of reinforcing ribs A (24) is n, and the reinforcing ribs A (24) are located between two adjacent screw holes A (21).

3. The drive axle reducer housing according to claim 2, characterized in that: Two symmetrical differential bearing mounting components are fixed on the housing (10), and the differential bearing mounting components include two vertical load-bearing columns (30). A semi-annular differential bearing mounting platform (31) is provided between the two load-bearing columns (30). The housing (10) is fixed below the differential bearing mounting platform (31) via three reinforcing ribs B (32). The load-bearing columns (30) are fixed to the housing (10) via reinforcing ribs C (33), and the reinforcing ribs C (33) are located in the direction opposite to the differential bearing mounting platform (31).

4. The drive axle reducer housing according to claim 3, characterized in that: A positioning pin hole (25) is provided on the upper flange surface (20).

5. A main reducer assembly, characterized in that: It comprises the drive axle reducer housing as claimed in claim 1, wherein when the upper flange surface (20) of the drive axle reducer housing is installed with the main cone bearing seat, the locating pin passes through the locating pin hole on the main cone bearing seat and the locating pin hole (25) on the upper flange surface (20).

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