Drive axle speed reducer shell and main speed reducer assembly

Abstract

The utility model 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 utility model has the technical effects that the reinforcing ribs extend from the bearing seat supporting surface to the upper flange surface, so that the reinforcing ribs are optimized to be connected with the differential bearing hole and the reducer housing, the rigidity of the reducer housing is improved, the deformation of the guide bearing hole when the gear is loaded is reduced, and the reverse dragging torque of the main reducer is improved; meanwhile, the transmission error of the gear is reduced, and the NVH performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile parts, specifically relates to a drive axle speed reducer shell and main speed reducer assembly. BACKGROUND

[0002] The speed reducer shell is an important automobile part, and like patent document CN205244308U, a novel lightweight main speed reducer shell is disclosed.

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

[0004] Technical problem: The rigidity of the current speed reducer shell cannot be designed as required. Utility model content

[0005] The technical problem to be solved by the utility model: how to design a drive axle speed reducer shell and main speed reducer assembly to improve the rigidity of the speed reducer shell.

[0006] The technical scheme of the utility model is as follows:

[0007] A drive axle speed reducer shell comprises a shell body, a guide bearing seat is fixed in the shell body, a plurality of reinforcing ribs A are fixed on the inner wall of the shell body between the upper side of the guide bearing seat support surface of the guide bearing seat and the lower surface of the upper flange surface, the reinforcing ribs A extend along the axial direction, and the two ends of the reinforcing ribs A are fixed on the guide bearing seat and the upper flange surface respectively.

[0008] The screw holes A of the upper flange surface are 2n, n is a natural number, the number of the reinforcing ribs A is n, and the reinforcing ribs A are located between two adjacent screw holes A.

[0009] Two symmetrical differential mechanism bearing mounting components are fixed on the shell body, the differential mechanism bearing mounting component comprises two vertical bearing columns, a half-ring-shaped differential mechanism bearing mounting table is arranged between the two bearing columns, the shell body is fixed below the differential mechanism bearing mounting table through three reinforcing ribs B, the bearing column is fixed to the shell body through a reinforcing rib C, and the reinforcing rib C is located in the direction opposite to the differential mechanism bearing mounting table.

[0010] The upper flange surface is provided with a positioning pin hole.

[0011] A drive main speed reducer assembly comprises the above drive axle speed reducer shell, when the upper flange surface of the drive axle speed reducer shell is mounted with a main conical bearing seat, a positioning pin penetrates the positioning pin hole on the main conical bearing seat and the positioning pin hole on the upper flange surface.

[0012] Compared with the prior art, the technical effect of the utility model is that the reinforcing rib of the utility model extends from the bearing seat supporting surface to the upper flange surface, the reinforcing rib is connected with the differential gear bearing hole and the reduction shell, the stiffness of the reduction shell is improved, the deformation of the guide bearing hole when the gear is loaded is reduced, the reverse drag torque of the main reducer is improved, the transmission error of the gear is reduced, and the NVH performance is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the three-dimensional schematic view (one) of the utility model.

[0014] Figure 2 is the three-dimensional schematic view (two) of the utility model.

[0015] Figure 3 is the schematic view of the utility model.

[0016] Figure 4 is the schematic view of the prior art patent document. DETAILED DESCRIPTION

[0017] The utility model will be described in detail below in combination with the drawings and the specific implementation.

[0018] As Figures 1-2 A kind of drive axle reducer shell, including shell 10, guiding bearing seat 23 is fixed in shell 10, the upper side surface of the guiding bearing seat supporting surface of guiding bearing seat 23 is fixed with the lower surface of upper flange surface 20 between the inner wall of shell 10, multiple longitudinal setting reinforcing rib A24 are fixed on the inner wall of shell 10, reinforcing rib A24 extends along the axial direction, and its two ends are fixed on guiding bearing seat 23, upper flange surface 20 respectively.

[0019] In this way, the two end portions of reinforcing rib A24, one side surface are fixed on shell 10, so that guiding bearing seat 23, upper flange surface 20, reinforcing rib A24 form three-dimensional structure, can be supported and related in longitudinal direction, transverse direction, so that the stiffness of reducer shell is enhanced.

[0020] The screw hole A21 of upper flange surface 20 is 2n, and n is natural number, the number of reinforcing rib A24 is n, and reinforcing rib A24 is located between two adjacent screw hole A21.

[0021] As Figures 1-2 Two symmetrical differential gear bearing mounting components are fixed on shell 10, and the differential gear bearing mounting component includes two vertical bearing columns 30, a half-ring differential gear bearing mounting table 31 is arranged between the two bearing columns 30, the shell 10 is fixed by three reinforcing ribs B32 below the differential gear bearing mounting table 31, the bearing column 30 is fixed to the shell 10 by reinforcing rib C33, and the reinforcing rib C33 is located in the direction opposite to the differential gear bearing mounting table 31.

[0022] In this way, the load bearing column 30, the differential bearing mounting platform 31, the reinforcing rib B 32 and the reinforcing rib C 33 are similar to the structure of a suspension bridge, and the structure is relatively stable, so that the rigidity of the reducer shell is enhanced.

[0023] During installation, the main cone bearing seat and other components are not easy to align, and therefore the following improvements are made:

[0024] As Figure 1 The upper flange surface 20 is provided with a positioning pin hole 25, and when the upper flange surface 20 is installed with the main cone bearing seat, the positioning pin is inserted through the positioning pin hole on the main cone bearing seat and the positioning pin hole 25 on the upper flange surface 20.

[0025] A drive main reducer assembly includes the above-mentioned drive axle reducer shell, and when the upper flange surface 20 of the drive axle reducer shell is installed with the main cone bearing seat, the positioning pin is inserted through the positioning pin hole on the main cone bearing seat and the positioning pin hole 25 on the upper flange surface 20.

[0026] The lower flange surface 40 of the shell 10 is provided with a pin hole 41.

[0027] The features of the present application are:

[0028] S1, the main reducer shell is newly designed, the reinforcing rib is connected to the guide bearing seat and the upper surface bolt hole, the reinforcing rib is connected to the differential bearing hole and the reducer shell, the rigidity of the reducer shell is improved, the deformation of the guide bearing hole when the gear is loaded is reduced, the reverse drag torque of the main reducer is improved, the transmission error of the gear is reduced, and the NVH performance is improved.

[0029] NVH performance: refers to the noise (Noise), vibration (Vibration) and sound roughness (Harshness) generated during the driving process of the automobile, which is an important indicator for measuring the comfort and quality of the automobile. The NVH performance not only affects the user's driving experience, but also directly reflects the manufacturing process and quality level of the automobile.

[0030] S2, the differential bearing hole is connected to the reducer shell body through the ring rib, the deformation of the differential bearing hole position when loaded is reduced, and the NVH performance is improved.

[0031] S3, the main reducer shell and the main cone bearing seat are positioned by the positioning pin and fastened by the bolt, the shell offset distance error caused by the gap between the shaft holes is reduced, and the installation precision of the main and driven bevel gears is improved.

[0032] Other contents refer to the prior art.

[0033] The above is only the preferred embodiment of the present application, and it should be pointed out that for those skilled in the art, without departing from the overall concept of the present application, some changes and improvements can be made, which should be regarded as the protection range of the present application.

Claims

1. A drive axle reduction gear housing comprising a housing (10) in which a stationary pilot bearing seat (23) is fixed, characterised in that: A plurality of longitudinal reinforcing ribs A (24) are fixed on the inner wall of the casing (10) between the upper side 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 along the axial direction, and two ends of the reinforcing ribs A (24) are fixed on the guide bearing seat (23) and the upper flange surface (20) respectively.

2. The drive axle reducer housing of claim 1, wherein: The screw holes A (21) of the upper flange surface (20) are 2n in number, n is a natural number, the number of the 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 of claim 2, wherein: Two symmetrical differential bearing mounting components are fixed on the casing (10), the differential bearing mounting component comprises two vertical bearing columns (30), a half-ring-shaped differential bearing mounting table (31) is arranged between the two bearing columns (30), the casing (10) is fixed below the differential bearing mounting table (31) through three reinforcing ribs B (32), the bearing column (30) is fixed on the casing (10) through a reinforcing rib C (33), and the reinforcing rib C (33) is located on the opposite side of the differential bearing mounting table (31).

4. The drive axle reducer housing of claim 3, wherein: The upper flange surface (20) is provided with a positioning pin hole (25).

5. A drive main reducer assembly, characterized by: The drive axle reducer casing comprises the drive axle reducer casing and a main cone bearing seat, when the main cone bearing seat is mounted on the upper flange surface (20) of the drive axle reducer casing, the positioning pin penetrates through the positioning pin hole on the main cone bearing seat and the positioning pin hole (25) on the upper flange surface (20).

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