Structure of light truck axle housing lateral support and welding strengthening method

Abstract

The invention discloses a light truck axle housing lateral support structure and a welding strengthening method.The light truck axle housing lateral support structure comprises an axle housing body, an air chamber support, an air chamber support, a connecting bolt, an air chamber and a nut, and the air chamber support is welded and fixed to the axle housing body in a welding mode; the air chamber support is fixed on the air chamber support of the axle housing body through the connecting bolt, the air chamber is inserted into the air chamber support and fastened through the nut, and the air chamber support is fixed on the axle housing body in the mode of a middle annular welding seam and a transverse welding seam. Due to the optimization of the structure, the transverse welding seams which are arranged up and down do not have the process hidden danger of poor welding consistency of the arc starting part and the arc stopping part of the original longitudinal welding seam, the dependence on the welding process is greatly reduced, and the qualified rate of products is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of light truck bridges, and in particular to a structure of a lateral support of a light truck bridge housing and a welding reinforcement method. Background Art

[0002] The drive axle is a core component of commercial vehicles. Light truck axle housings are welded with various supports in the fore-aft direction. These supports are subject to repeated vertical impacts on bumpy and impactful roads. Improper design can lead to insufficient support strength or cracking of the welds at the bottom of the supports, and in severe cases, fracture of the axle housing itself. Vibration acceleration measurements collected on real vehicles on rough roads revealed that the vibration acceleration at the center of mass of the motor of a 6T new energy light truck can reach up to 60G, and the vibration acceleration at the center of mass of the air chamber of a 7T new energy light truck can reach up to 35G. Both trucks experience varying degrees of cracking in their lateral supports or welds. Summary of the Invention

[0003] The purpose of the present invention is to solve the defects of the prior art and provide a structure and welding strengthening method for a lateral support of a light truck axle housing.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A light truck axle housing lateral support structure includes an axle housing body, an air chamber support, an air chamber bracket, connecting bolts, an air chamber, and nuts. The air chamber support is welded and fixed to the axle housing body. The air chamber bracket is fixed to the air chamber support of the axle housing body through connecting bolts, and the air chamber is inserted into the air chamber bracket and fastened by the nut.

[0005] Furthermore, the air chamber support is fixed to the bridge housing body in the form of a central annular weld and a transverse weld.

[0006] Furthermore, a welding reinforcement method for the lateral support of the light truck bridge housing is provided, wherein the air chamber support is welded to the bridge housing body, and the air chamber support adopts a hollow structure, which is both light in weight and convenient for arranging welds in multiple locations.

[0007] Furthermore, the air chamber support only allows two vertical welds to be arranged on the outside, and the structure supports square ring welding in the middle area and one transverse weld in the upper and lower areas.

[0008] Furthermore, the square ring weld in the middle area of ​​the air chamber support improves the connection strength between the support and the bridge housing body and has a certain ability to resist lateral impact. The other two lateral welds in the upper and lower areas play a role in resisting the vertical impact caused by the weight of the air chamber.

[0009] The beneficial effects of the present invention are: 1. Transverse ribs are added to the middle part of the air chamber support to improve the strength of the air chamber support; 2. The middle part of the air chamber support and the bridge shell body are fixed by an annular weld, which improves the connection strength between the air chamber support and the bridge shell; 3. The transverse welds arranged above and below the air chamber support can convert the stress generated by the impact vibration at the upper and lower points of the original longitudinal welds into the entire transverse weld compared to the traditional bracket longitudinal welds, and the stress value is reduced to less than 30% of the original, which greatly improves the impact resistance of the product; 4. Thanks to the optimization of the structure, the transverse welds arranged above and below do not have the process hidden danger of poor welding consistency at the arc starting and arc ending parts of the original longitudinal welds, which greatly reduces the dependence on welding technology and improves the product qualification rate.

[0010] This simple, reliable, high-impact lateral support structure and welding reinforcement method can fundamentally improve the support's impact resistance, reduce the requirements for welding technology, and greatly improve the weld qualification rate and the vehicle road test pass rate; it can serve as a design reference for air chamber supports, motor fixing supports, and shock absorber brackets used in the arrangement of camshaft brakes. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a diagram of the assembly structure of the air chamber support; Figure 2 This is a schematic diagram of the structure and welding position of the existing traditional air chamber support; Figure 3 It is a schematic diagram of the structure and welding position of the air chamber support of the present invention. DETAILED DESCRIPTION

[0012] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0013] Reference Figure 1 A structure of a lateral support of a light truck bridge housing includes a bridge housing body 1, an air chamber support 2, an air chamber bracket 3, a connecting bolt 4, an air chamber 5, and a nut 6.

[0014] The air chamber support 2 is welded and fixed to the axle housing body 1, the air chamber bracket 3 is fixed to the air chamber support 2 of the axle housing through connecting bolts 4, the air chamber 5 is inserted into the air chamber bracket 3, and fastened with nuts 6.

[0015] like Figure 2 The structure and welding position diagram of the conventional air chamber support is shown below, which further illustrates the existing embodiment: The traditional air chamber support adopts a hollow structure with the middle area not connected to the axle housing; The structural setting determines that the air chamber support can only be fixed to the bridge housing body 1 using the outer longitudinal weld 001 and the outer longitudinal weld 002; When the vehicle is in motion, especially over bumpy roads, the weight of the air chamber, through the lever arm formed by the air chamber bracket, generates a torque on the welds between the axle housing and the air chamber support. As vertical vibration intensifies, this torque acts on the welds, generating stress that exceeds the weld strength, causing cracks or even tears in the axle housing, leading to oil leaks and breakage. Therefore, the vertical impact force tolerance of this structure and weld placement is limited, and this torque initially acts on the upper and lower cusps of the longitudinal weld, which coincide with the arc starting and ending points. This makes welding consistency difficult to control and results in poor process performance.

[0016] like Figure 3 The structure and welding position diagram of the air chamber support of the present invention are further explained in the existing embodiment: The air chamber support of the present invention adds two transverse ribs that can be flush with the bridge housing body on the basis of the traditional air chamber support; The air chamber support of the present invention is fixed to the bridge housing body 1 in the form of a central annular weld 003 and transverse welds 004 and 005; By comparing the structures and welding positions of the above two air chamber supports, it can be summarized that the structure and welding strengthening method of the light truck bridge shell lateral support of the present invention have the following advantages: 1. Transverse ribs are added to the middle part of the air chamber support to improve the strength of the air chamber support; 2. The middle part of the air chamber support and the bridge shell body are fixed by an annular weld, which improves the connection strength between the air chamber support and the bridge shell; 3. The transverse welds arranged above and below the air chamber support can convert the stress generated by the impact vibration at the upper and lower points of the original longitudinal welds into the entire transverse weld compared to the longitudinal welds of the traditional bracket, and the stress value is reduced to less than 30% of the original, which greatly improves the impact resistance of the product; 4. Thanks to the optimization of the structure, the transverse welds arranged above and below do not have the process hidden danger of poor welding consistency at the arc starting and arc ending parts of the original longitudinal welds, which greatly reduces the dependence on the welding process and improves the qualified rate of the product.

[0017] From the above description, this simple and reliable high-impact lateral support structure and welding reinforcement method can fundamentally improve the support's impact resistance, reduce the requirements for welding technology, greatly improve the weld qualification rate and the vehicle road test pass rate; it can be used as a design reference for air chamber supports, motor fixing supports and shock absorber brackets used in the arrangement of camshaft brakes.

[0018] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A light truck axle housing lateral support structure, comprising an axle housing body, an air chamber support, an air chamber bracket, connecting bolts, an air chamber, and nuts, characterized in that: The air chamber support is welded and fixed to the axle housing body by welding; The air chamber bracket is fixed to the air chamber support of the axle housing body through connecting bolts, and the air chamber is inserted into the air chamber bracket and fastened by the nut.

2. The structure of the light truck axle housing lateral support according to claim 1, characterized in that: The air chamber support is fixed to the bridge housing body in the form of a central annular weld and a transverse weld.

3. A welding strengthening method for a light truck axle housing lateral support according to claim 1, characterized in that: The air chamber support is welded to the bridge housing body. The air chamber support adopts a hollow structure, which is light in weight and convenient for arranging welds in multiple places.

4. The welding strengthening method according to claim 3, characterized in that: The air chamber support only allows two vertical welds to be arranged on the outside. The structure supports square ring welding in the middle area and one transverse weld in the upper and lower areas.

5. The welding strengthening method according to claim 3, characterized in that: The square ring weld in the middle area of ​​the air chamber support improves the connection strength between the support and the bridge shell body and has a certain ability to resist lateral impact. The other two transverse welds in the upper and lower areas play a role in resisting the vertical impact caused by the weight of the air chamber.

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