Novel triangular plate structure for drive axle housing

Abstract

The utility model relates to a novel triangular plate structure for a drive axle housing, which comprises a housing upper body, an axle housing lower body and a triangular plate assembly, the axle housing upper body and the axle housing lower body adopt a plate punch forming process structure to form a notch of a U-shaped cavity, and the notch of the axle housing upper body and the notch of the axle housing lower body are welded by adopting a butt weld. Four triangular notches are formed in the front face and the rear face, and the triangular plate assembly is welded to the triangular notches formed by butt welding of the upper axle housing body and the lower axle housing body. According to the structure, the instability of triangular sharp point gaps caused by differences among the axle housing upper body, the axle housing lower body and the triangular plates is eliminated, meanwhile, the small base plate prevents front welding fluid from leaking, welding burnthrough is avoided, the requirement for the designed penetration depth is met, oil leakage at the triangular sharp points is prevented, and the quality of welded products is improved.

Description

Technical Field

[0001] The utility model relates to the field of automobile parts, in particular to a novel triangular plate structure for axle housing of a driving axle. Background Art

[0002] During the processing of the drive axle housing assembly, a certain drive axle housing assembly with a triangle plate leaked oil at the sharp weld of the triangle plate. The oil leakage will cause the driving gear and driven gear, bearings, etc. of the drive axle to have poor lubrication or even no oil lubrication. Poor lubrication will aggravate gear wear and bearing burning, which will lead to early damage to the drive axle and affect the transmission function.

[0003] There are three main reasons for the oil leakage at the tip of the triangle plate: 1. From the design and structural analysis, since this point is a stress concentration point, the weld penetration depth at this point is required to be higher; 2. The tip of the triangle plate is assembled from three parts (upper body, lower body, triangle plate), and is affected by the differences of each part, resulting in unstable gaps at the tip of the triangle. According to the normal welding process, when the tip is first spot-welded and then fully welded, the weld penetration depth at this point fluctuates, affecting the product quality; 3. After analyzing the faulty parts, it was found that the weld penetration depth at the oil leakage tip position was only 65%, which did not meet the process requirement of ≥70%.

[0004] Based on the existing technical problems, the present application improves the triangular plate structure used for a new type of drive axle housing. Utility Model Content

[0005] The purpose of the utility model is to solve the defects of the prior art and provide a novel triangular plate structure for a drive axle housing.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A novel triangular plate structure for a drive axle housing comprises an upper housing body, a lower housing body and a triangular plate assembly. The upper housing body and the lower housing body are formed by a sheet metal stamping process to form a notch of a U-shaped cavity. The notch of the upper housing body and the notch of the lower housing body are butt welded to form a total of four triangular notches at the front and rear sides. The triangular plate assembly is welded at the triangular notches of the butt welding of the upper housing body and the lower housing body.

[0008] Furthermore, the triangle plate assembly includes a triangle plate and a small pad, wherein the small pad is arranged at the midline of a non-arc sharp corner of the triangle plate, and the small pad extends 3-6 mm beyond the non-arc sharp corner of the triangle plate.

[0009] Furthermore, the small pad is spot welded at a non-arc sharp corner of the triangular plate.

[0010] Further, an angle of the triangular plate is designed to be the angle of a triangle formed by the butt welding of the upper body of the bridge housing and the lower body of the bridge housing;

[0011] The other two angles of the triangular plate are designed to be arc-shaped sharp angles tangent to the assembly of the main reduction housing of the drive axle. The angles of the two arc-shaped sharp angles are the same, and the single-sided gap of the triangle butt-welded with the upper body of the bridge housing and the lower body of the bridge housing is maintained at 0.5mm.

[0012] Furthermore, the small pad extends beyond the non-arc-shaped sharp corner of the triangle plate by 5 mm, and the thickness of the small pad is 3 mm.

[0013] The beneficial effects of the utility model are as follows: the structure eliminates the instability of the gap between the triangle tip caused by the differences between the upper body of the bridge housing, the lower body of the bridge housing and the triangle plate. At the same time, the small pad prevents the front welding liquid from dripping, avoids welding burn-through, ensures the design melting depth requirements, prevents oil leakage at the triangle tip, and improves the quality of the welding product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of the drive axle housing body welding;

[0015] Figure 2 for Figure 1 Schematic diagram of the cross section along line YY;

[0016] Figure 3 This is a partial schematic diagram of the internal welding of the drive axle housing body;

[0017] Figure 4 This is a schematic diagram of welding of the triangular plate assembly of the utility model;

[0018] Figure 5 It is a structural schematic diagram of a small cushion block of the utility model. DETAILED DESCRIPTION

[0019] Reference Figure 1 A novel triangular plate structure for a drive axle housing comprises an upper housing body 1, a lower housing body 2 and a triangular plate assembly 3. The upper housing body 1 and the lower housing body 2 are formed by a sheet metal stamping process to form a notch of a U-shaped cavity. The notch of the upper housing body and the notch of the lower housing body are butt welded, forming a total of four triangular notches at the front and rear sides. The triangular plate assembly 3 is welded at the triangular notch of the butt welding of the upper housing body and the lower housing body.

[0020] Furthermore, the triangle plate assembly 3 includes a triangle plate 3-1 and a small pad 3-2. The small pad 3-2 is arranged at the midline of a non-arc sharp corner of the triangle plate 3-1. The small pad extends 5mm beyond the non-arc sharp corner of the triangle plate. The size of the small pad is 65*20mm and the thickness is 3mm.

[0021] Furthermore, the small pad 3-2 is spot welded at a non-arc-shaped sharp corner of the triangular plate 3-1. One angle of the triangular plate 3-1 is designed to be the angle of a triangle formed by the butt welding of the upper body 1 of the bridge housing and the lower body 2 of the bridge housing; the other two angles of the triangular plate 3-1 are designed to be arc-shaped sharp angles formed by being tangent to the assembly of the main reduction housing of the drive axle. The angles of the two arc-shaped sharp angles are the same, and the single-sided gap of the triangle butt welding with the upper body 1 of the bridge housing and the lower body 2 of the bridge housing is maintained at 0.5mm.

[0022] The actual assembly of the triangular plate structure is as follows:

[0023] Fix the notches of the bridge housing upper body 1 and the bridge housing lower body 2 with fixtures and level them, and weld them firmly with butt welds. At the midline of a non-arc sharp corner of the triangle plate 3-1, place the small pad 3-2 about 5mm beyond the non-arc sharp corner of the triangle plate 3-1, and use spot welding to weld them firmly. Then, level the faces of a triangle plate assembly 3 without the small pad 3-2 with the faces of the bridge housing upper body 1 and the bridge housing lower body 2, and the small pad 3-2 is inside the U-shaped cavity of the bridge housing upper body 1 and the bridge housing lower body 2. According to the normal welding process, fix the triangle plate assembly 3 with fixtures, and first spot weld and fix the triangle plate assembly 3 at the sharp point just above the small pad 3-2, and then fully weld the edges of the triangle plate 3-1 and the bridge housing upper body 1 and the bridge housing lower body 2. After the bridge housing upper body 1 and the bridge housing lower body 2 are welded, a total of four triangular areas are formed, and four triangular plate assemblies 3 are welded firmly in the same way.

[0024] After adding a small pad 3-2 to the triangle plate 3-1, the instability of the gap at the triangle tip caused by the difference between the upper body 1 of the bridge housing, the lower body 2 of the bridge housing and the triangle plate 3-1 is eliminated. At the same time, the small pad 3-2 prevents the front welding liquid from dripping, avoids welding burn-through, and prevents oil leakage at the triangle tip, thereby improving the quality of the welding product and ensuring the safety of vehicle driving.

[0025] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A novel triangular plate structure for a drive axle housing, comprising an upper axle housing body, a lower axle housing body and a triangular plate assembly, characterized in that: The upper body of the bridge housing and the lower body of the bridge housing are structured by plate stamping process to form a notch of a U-shaped cavity. The notch of the upper body of the bridge housing and the notch of the lower body of the bridge housing are welded by butt welds, and a total of four triangular notches are formed on the front and back surfaces. The triangular plate assembly is welded at the triangular notches of the butt welds of the upper body of the bridge housing and the lower body of the bridge housing.

2. A novel triangular plate structure for a drive axle housing according to claim 1, characterized in that: The triangular plate assembly includes a triangular plate and a small pad, wherein the small pad is arranged at the midline of a non-arc sharp corner of the triangular plate, and the small pad extends beyond the non-arc sharp corner of the triangular plate by 3-6 mm.

3. A novel triangular plate structure for a drive axle housing according to claim 2, characterized in that: The small pad is spot welded at a non-arc sharp corner of the triangular plate.

4. The novel triangular plate structure for axle housing of a drive axle according to claim 2 is characterized in that: An angle of the triangular plate is designed to be the angle of a triangle formed by the butt welding of the upper body of the axle housing and the lower body of the axle housing; The other two angles of the triangular plate are designed to be arc-shaped sharp angles formed by tangent assembly with the main reduction housing of the drive axle. The angles of the two arc-shaped sharp angles are the same, and the single-side gap of the triangle butt-welded with the upper body of the bridge housing and the lower body of the bridge housing is maintained at 0.5mm.

5. The novel triangular plate structure for axle housing of a drive axle according to claim 2 is characterized in that: The small pad extends beyond the non-arc sharp corner of the triangular plate by 5 mm, and the thickness of the small pad is 3 mm.

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