CN218929130U

CN218929130U - Novel back torsion beam structure

Info

Publication number: CN218929130U
Application number: CN202223488079.6U
Authority: CN
Inventors: 姜飞
Original assignee: Liaoning Sg Automotive Group Co ltd
Current assignee: Liaoning Sg Automotive Group Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-04-28
Anticipated expiration: 2032-12-27

Abstract

The utility model provides a novel rear torsion beam structure, which is characterized in that: the device comprises a cross beam formed by integral molding and two longitudinal arms positioned at two ends of the cross beam, wherein the two ends of the cross beam are U-shaped, and the middle part of the cross beam is V-shaped; the lower edge of the cross beam is arc-shaped; a connecting arm is arranged above the longitudinal arm, and a sleeve is arranged above the connecting arm; a wheel bracket is arranged at the end part of the longitudinal arm; a spring support is arranged below the longitudinal arm, and a shock absorber bracket is also arranged on the spring support; the novel reinforced plastic plate comprises a reinforcing plate, wherein one end of the reinforcing plate is provided with a bending part, and the end part of the bending part is provided with a V-shaped opening; the reinforcing plate is arranged at the opening below the longitudinal arm, and the bending part is positioned at the opening below the end part of the cross beam. According to the utility model, through the rear torsion beam structure with the longitudinal arms and the cross beams integrated, a structural mode of welding the longitudinal arms and the cross beams of the traditional rear torsion beam auxiliary frame is replaced, the integral strength and reliability are improved, and the risks caused by weld defects and the like in the prior art are reduced.

Description

Novel back torsion beam structure

Technical Field

The utility model belongs to the technical field of automobile chassis structures, and relates to a novel rear torsion beam structure.

Background

The automobile industry is rapidly developed and brands are numerous, but with the continuous improvement of the living standard of people, the requirements on comprehensive performance indexes such as safety, operability, comfort and the like of automobiles are higher and higher. For the whole car manufacturer, how to build a high-cost-performance and low-cost car is important in competition. At present, the class A car in the domestic market is the first choice of a household car, the auxiliary frame structure of the rear torsion beam is widely applied, the structure is simple, the cost is low, the weight is light, the occupied space is small, the vehicle is loved by the class A car and the small and medium SUV, and the semi-independent suspension structure of the torsion beam structure is the first choice of the class A car. How to realize the improvement of the performance, the cost and the space of the chassis by changing the structure of the rear torsion beam is a key factor of the whole vehicle design.

As shown in fig. 5, the existing auxiliary frame of the rear torsion beam assembly adopts an H-shaped structure at present, and is formed by welding left and right longitudinal arms 2 and a cross beam 1, most of the cross beam is formed by stamping a low-carbon steel plate, the welding area is small, the welding part bears larger weight load, the welding effect is good or bad, the safety is directly affected, a large amount of welding is problematic, and great hidden danger can be brought to the safety of the whole vehicle. In addition, the traditional torsion beam is formed by welding left and right longitudinal arms and a cross beam, the requirements on stamping and welding processes are high, when the road surface bumpy and uneven wheels jump up and down and are impacted, the whole torsion and torsion of the rear torsion beam are driven, the phenomenon of weld cracking easily occurs, particularly, the positions of the welding seams 10 of the left and right longitudinal arms and the cross beam are extremely high in fatigue failure risk, a plurality of difficulties are brought to production management and quality control, and the cost is high. There are also a small number of product cross beams which adopt a closed beam structure and are formed by internal high pressure, but the cost is higher and the production efficiency is lower. Therefore, how to match the structures of the cross beam, the longitudinal arm, the vehicle body connecting sleeve, the wheel bracket, the spring support and the shock absorber bracket is particularly important to design a novel rear torsion beam.

Disclosure of Invention

The purpose of the utility model is that: the novel rear torsion beam structure is provided to solve the problem that the potential safety hazard of the whole vehicle possibly caused by the problems of welding seams and the like in the prior art.

The utility model is realized by the following technical scheme: novel back torsion beam structure, its characterized in that: the cross beam is formed by integral molding, and two longitudinal arms are positioned at two ends of the cross beam, wherein the cross sections of the two ends of the cross beam are U-shaped, and the cross section of the middle part of the cross beam is V-shaped; the lower edge of the cross beam is arc-shaped; a connecting arm is arranged above the longitudinal arm, and a sleeve is arranged above the connecting arm; a wheel bracket is arranged at the end part of the longitudinal arm; a spring support is arranged below the longitudinal arm, and a shock absorber bracket is also arranged on the spring support; the novel reinforced plastic plate comprises a reinforcing plate, wherein one end of the reinforcing plate is provided with a bending part, and the end part of the bending part is provided with a V-shaped opening; the reinforcing plate is arranged at the opening below the longitudinal arm, and the bending part is positioned at the opening below the end part of the cross beam.

Further: the lower extreme of linking arm is provided with the recess that matches with the appearance of trailing arm, and the linking arm overlap joint is on the trailing arm and welded connection.

The utility model has the advantages that: according to the utility model, through the rear torsion beam structure with the longitudinal arms and the cross beams integrated, a structural mode of welding the longitudinal arms and the cross beams of the traditional rear torsion beam auxiliary frame is replaced, the integral strength and reliability are improved, and the risks caused by weld defects and the like in the prior art are reduced. In addition, in this structure, the mode such as rigidity, intensity, tired of torsion beam sub vehicle frame after also can be simple through changing cross-section size, cavity size, material thickness, reinforcing plate welded position, length etc. adjusts overall performance such as stress concentration, produces the risk of inefficacy, has reduced welding cost simultaneously, quality control cost to satisfy the performance requirement of whole car.

Drawings

The utility model is further described below with reference to the accompanying drawings.

FIG. 1 is a schematic view of a rear torsion beam structure of the present utility model;

FIG. 2 is a schematic diagram of the beam structure of the present utility model;

FIG. 3 is a schematic view of the reinforcement structure of the present utility model;

FIG. 4 is a cross-sectional schematic view of a cross-beam;

fig. 5 is a schematic view of a rear torsion beam structure in the prior art.

The serial numbers in the figures illustrate: the vehicle wheel comprises a cross beam 1, a longitudinal arm 2, a connecting arm 3, a sleeve 4, a wheel bracket 5, a spring bracket 6, a shock absorber bracket 7, a reinforcing plate 8, a V-shaped opening 9, a welding seam 10 and a lower edge 11.

Detailed Description

The following description of the embodiments of the present utility model will be made in detail and with reference to the accompanying drawings, wherein it is apparent that the embodiments described are only some, but not all embodiments of the present utility model. All other embodiments, which can be made by a person of ordinary skill in the art without the need for inventive faculty, are within the scope of the utility model, based on the embodiments described in the present utility model.

As shown in fig. 1-4, the utility model discloses a novel rear torsion beam structure, which comprises a beam 1 formed by integral molding and two longitudinal arms 2 positioned at two ends of the beam, wherein the two ends of the beam are big, middle and small and are in smooth transition, the sections of the two ends of the beam are U-shaped, the section of the middle is V-shaped (see fig. 4 in particular, the sections of the two positions in a circle in fig. 4 along the length direction of the beam); the lower edge 11 of the cross beam is arc-shaped; a connecting arm 3 is arranged above the longitudinal arm, and a sleeve 4 is arranged above the connecting arm; a wheel bracket 5 is arranged at the end part of the trailing arm; a spring bracket 6 is arranged below the longitudinal arm, and a shock absorber bracket 7 is also arranged on the spring bracket; the novel reinforced plastic plate further comprises a reinforced plate 8, wherein a bending part is arranged at one end of the reinforced plate, and a V-shaped opening 9 is arranged at the end part of the bending part; the reinforcing plate is arranged at the opening below the longitudinal arm, and the bending part is positioned at the opening below the end part of the cross beam.

Preferably: the lower extreme of linking arm is provided with the recess with the appearance matched with of trailing arm, and the recess of linking arm is the same with the trailing arm appearance of junction, and welded connection can form longer welding seam after the overlap joint is on the trailing arm and improve the welding area, increases the reliability.

In the scheme, other parts except the cross beam are two, and are distributed symmetrically or approximately symmetrically relative to the cross beam, so that a novel cross beam assembly structure is provided. After the reinforcing plate is welded with the lower part of the longitudinal arm, the open longitudinal arm forms an approximately sealed cavity structure, the strength of the longitudinal arm is enhanced, and the spring support is convenient to fixedly mount. The bending part at the front end of the reinforcing plate is matched with the included angle between the longitudinal arm and the cross beam, and the V-shaped opening enables the reinforcing plate to be welded on the two edges of the lower part of the cross beam better, so that the stress effect can not be generated.

In this scheme, crossbeam and two trailing arms form a horizontal "[ shape" that puts, weld the link arm structure in the shoulder, fixed spring support isotructure through the reinforcing plate in the lower part. Reasonable arrangement, reliable fixation and easy operation and processing. The cross beam adopts an arc transition mode from U shape to V shape, thereby ensuring the strength and improving the torsionality. In addition, in this scheme structure, adaptable different motorcycle types and requirement, whole back torsion beam structure adjusts the rigidity, intensity, the overall performance such as modality of torsion beam through adjusting cross-section size, cavity size, material thickness, reinforcing plate welded position, length of straight line portion in the middle of the crossbeam to satisfy the performance requirement of whole car

This scheme is in the use, jolts the unevenness and makes the wheel beat from top to bottom and receive the impact when the road, drives whole vibrations of back torsion beam, twists reverse, and traditional torsion beam is H shape welding and by forming, easily takes place the phenomenon of weld opening fracture, and the back torsion beam crossbeam structure of this scheme adopts trailing arm and crossbeam integral type structure, when the crossbeam takes place torsional deformation, has avoided the stress concentration that brings by trailing arm and crossbeam welding, premature fatigue and the risk of welding seam fracture.

Claims

1. Novel back torsion beam structure, its characterized in that: comprises a cross beam formed by integral molding and two longitudinal arms positioned at two ends of the cross beam,

the cross sections of the two ends of the cross beam are U-shaped, and the cross section of the middle part of the cross beam is V-shaped; the lower edge of the cross beam is arc-shaped;

a connecting arm is arranged above the longitudinal arm, and a sleeve is arranged above the connecting arm;

a wheel bracket is arranged at the end part of the longitudinal arm;

a spring support is arranged below the longitudinal arm, and a shock absorber bracket is also arranged on the spring support;

the novel reinforced plastic plate comprises a reinforcing plate, wherein one end of the reinforcing plate is provided with a bending part, and the end part of the bending part is provided with a V-shaped opening; the reinforcing plate is arranged at the opening below the longitudinal arm, and the bending part is positioned at the opening below the end part of the cross beam.

2. The novel rear torsion beam structure according to claim 1, wherein: the lower extreme of linking arm is provided with the recess that matches with the appearance of trailing arm, and the linking arm overlap joint is on the trailing arm and welded connection.