Electric drive axle shell welding structure

Abstract

The utility model relates to an electric drive axle shell welding structure which comprises a left differential shell, a left planet carrier, a right planet carrier and a right differential shell. The right end of the left planet carrier and the left end of the right planet carrier are welded and fixed, the right planet carrier is arranged outside the left differential case in a sleeving mode and welded and fixed, and the right end of the right planet carrier and the left end of the right differential case are welded and fixed. The left differential case, the right differential case, the left planet carrier and the right planet carrier are arranged into a whole, use of bolts is reduced, space arrangement of the cases is optimized, the weight of an electric drive axle is reduced, and light weight is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of the structural design of automotive electric drive axles, and particularly relates to a welding structure of an electric drive axle housing. Background Art

[0002] At present, in the development of electric drive axle reducers, the structural space layout is compact and complex, and the housing space layout is limited. In the traditional structure, the left and right planetary carrier housings are connected by bolts. As Figure 1 shown, the left and right differential housings are also connected by bolts. As Figure 2 shown, and the left and right planetary carriers and the left and right differential housings are arranged separately, occupying a large space, having a heavy weight and a high cost. Summary of the Utility Model

[0003] Based on the above description, the utility model provides a welding structure of an electric drive axle housing to solve the technical problems in the prior art that the left and right differential housings are connected by bolts, the left and right planetary carrier housings and the left and right differential housings are arranged separately, occupying a large space, having a heavy weight and a high cost.

[0004] The technical solution of the utility model for solving the above technical problems is as follows:

[0005] A welding structure of an electric drive axle housing, which comprises a left differential housing, a left planetary carrier, a right planetary carrier and a right differential housing;

[0006] The right end of the left planetary carrier and the left end of the right planetary carrier are welded and fixed. The right planetary carrier is sleeved outside the left differential housing and welded and fixed. The right end of the right planetary carrier and the left end of the right differential housing are welded and fixed.

[0007] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects:

[0008] The present invention innovates the layout structure and connection method of the left and right planetary carriers and the left and right differential housings, and uses welding connection between them. The left and right differential housings and the left and right planetary carriers are arranged as a whole, reducing the use of bolts, optimizing the housing space layout, reducing the weight of the electric drive axle, and achieving lightweight.

[0009] On the basis of the above technical solution, the utility model can be further improved as follows.

[0010] Further, the left differential housing includes a cylindrical portion and a disc-shaped portion. The disc-shaped portion is coaxially connected to the right end of the cylindrical portion. A stepped hole is formed inside the right planetary carrier, and the stepped hole corresponds to the outer edge of the disc-shaped portion.

[0011] Further, the left planetary carrier is sleeved on the left differential housing and does not contact the left differential housing.

[0012] Further, the weldings between the left planet carrier and the right planet carrier, between the right planet carrier and the left differential case, and between the right planet carrier and the right differential case are all laser weldings.

[0013] Further, the right end of the left planet carrier and the left end of the right planet carrier are butt-jointed with consistent outer contours.

[0014] Further, the right end of the right planet carrier and the left end of the right differential case are butt-jointed with consistent outer contours. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a schematic structural diagram of the left and right planet carriers connected by bolts in the prior art;

[0016] Figure 2 FIG. is a schematic structural diagram of the left and right differential cases connected by bolts in the prior art;

[0017] Figure 3 FIG. is a schematic structural diagram of a welding structure of an electric drive axle housing provided by an embodiment of the present application.

[0018] In the figure, 10 is the left differential case, 20 is the left planet carrier, 30 is the right planet carrier, and 40 is the right differential case. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0021] As Figure 3 shown, an embodiment of the present application provides a welding structure of an electric drive axle housing, which includes a left differential case 10, a left planet carrier 20, a right planet carrier 30, and a right differential case 40.

[0022] Among them, the right end of the left planet carrier 20 and the left end of the right planet carrier 30 are welded and fixed, the right planet carrier 30 is sleeved outside the left differential case 10 and welded and fixed, and the right end of the right planet carrier 30 and the left end of the right differential case 40 are welded and fixed.

[0023] In a preferred embodiment of the present application, the left differential case 10 includes a cylindrical portion 11 and a disc-shaped portion 12. The disc-shaped portion 12 is coaxially connected to the right end of the cylindrical portion 11. A stepped hole 301 is formed inside the right planet carrier 30, and the stepped hole 301 is arranged corresponding to the outer edge of the disc-shaped portion 12.

[0024] Such a structural design increases the contact area between the right planet carrier 30 and the left differential case 10, ensuring the stability of the structure after welding.

[0025] Wherein, the left planet carrier 20 is sleeved on the left differential case 10 and does not contact the left differential case 10. The right end of the left planet carrier 20 and the left end of the right planet carrier 30 are butt-jointed with each other and have the same outer contour.

[0026] Furthermore, the welding between the left planet carrier 20 and the right planet carrier 30, between the right planet carrier 30 and the left differential case 10, and between the right planet carrier 30 and the right differential case 40 are all laser welding, preferably laser brazing welding. The right end of the right planet carrier 30 and the left end of the right differential case 40 are butt-jointed with each other and have the same outer contour.

[0027] The present invention innovates the layout structure and connection method of the left and right planet carriers and the left and right differential cases. Welding connections are adopted between them, arranging the left and right differential cases and the left and right planet carriers as a whole, reducing the use of bolts, optimizing the layout of the housing space, reducing the weight of the electric drive axle, and achieving lightweight.

[0028] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A welding structure of an electric drive axle housing, characterized in that, It includes a left differential case, a left planet carrier, a right planet carrier, and a right differential case; The right end of the left planet carrier and the left end of the right planet carrier are welded and fixed. The right planet carrier is sleeved outside the left differential case and welded and fixed. The right end of the right planet carrier and the left end of the right differential case are welded and fixed.

2. The welding structure of the electric drive bridge housing according to claim 1, characterized in that, The left differential case includes a cylindrical portion and a disc-shaped portion. The disc-shaped portion is coaxially connected to the right end of the cylindrical portion. A stepped hole is formed inside the right planet carrier, and the stepped hole is correspondingly arranged with the outer edge of the disc-shaped portion.

3. The welding structure of the electric drive bridge housing according to claim 1, characterized in that The left planet carrier is sleeved on the left differential case and does not contact the left differential case.

4. The welding structure of the electric drive bridge housing according to claim 1, wherein, The weldings between the left planet carrier and the right planet carrier, between the right planet carrier and the left differential case, and between the right planet carrier and the right differential case are all laser weldings.

5. The welding structure of the electric drive bridge housing according to claim 1, characterized in that, The right end of the left planet carrier and the left end of the right planet carrier are butt-jointed and have the same outer contour.

6. The welding structure of the electric drive bridge housing according to claim 1, wherein, The right end of the right planet carrier and the left end of the right differential case are butt-jointed and have the same outer contour.

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