CN103522864B

CN103522864B - Torsion beam rear axle crossbeam

Info

Publication number: CN103522864B
Application number: CN201310207682.9A
Authority: CN
Inventors: 许光
Original assignee: Shanghai Huizhong Automotive Manufacturing Co Ltd
Current assignee: Shanghai Huizhong Automotive Manufacturing Co Ltd
Priority date: 2013-05-29
Filing date: 2013-05-29
Publication date: 2017-02-22
Anticipated expiration: 2033-05-29
Also published as: CN103522864A

Abstract

The invention aims to provide a torsion beam rear axle crossbeam. The torsion beam rear axle crossbeam is characterized by comprising a crossbeam body, and the cross section of the crossbeam body is in a U shape; two longitudinal edges of the crossbeam body are provided with longitudinal upsiding down edges, and the belly portions of the two ends of the crossbeam body are higher than the belly portion of the middle section of the crossbeam body; transition sections are arranged from the end portions of the crossbeam body to the middle section of the crossbeam body, two reinforced plates are arranged on the inner side of the crossbeam body and extend towards the middle of the crossbeam body respectively from the different end portions of the crossbeam body, and the two sides of each reinforced plate are connected with the sidewall of the crossbeam body.

Description

Torsion beam rear axle crossbeam

Technical field

The present invention relates to automobile torsion beam rear axle crossbeam.

Background technology

Passenger-car chassis rear suspension adopts the structural shape of torsion beam rear axle to get more and more at present, mainly due to its structure letter Single, take up room little.But it is simple, on the contrary it is generally the case that torsion beam rear axle has a lot of performance needs that this does not represent its design Seek to address that the demand of vehicle performance.The torsional rigidity of wherein torsion beam rear axle is exactly one of its important performance parameter.In the past The control of the torsional rigidity of such product generally adopts nature round edge banding steel plate or closed section crossbeam, complex process, material Development cost remains high.

Content of the invention

It is an object of the invention to provide a kind of torsion beam rear axle crossbeam.

For realizing the torsion beam rear axle crossbeam of described purpose, it is characterized in, become the cross-beam body of U-shaped including cross section, horizontal Two longitudinal edges of beam body carry longitudinal flange, and the two ends belly of described cross-beam body will exceed interlude belly, described horizontal stroke There is changeover portion the end of beam body to interlude, is provided with two reinforcing plates inside described cross-beam body, and two reinforcing plates are from crossbeam originally The extension in the middle of cross-beam body respectively of the different ends of body, the side wall of the both sides of each reinforcing plate and cross-beam body connects.

Described torsion beam rear axle crossbeam, its further feature is that the width of described longitudinal flange is more than crossbeam thickness of slab 2 More than times.

Described torsion beam rear axle crossbeam, its further feature is that the two ends belly of described cross-beam body compares interlude Belly will exceed the 20% of interlude height.

Described torsion beam rear axle crossbeam, its further feature is that the leap width of described changeover portion is not less than crossbeam Body cross-section width.

Described torsion beam rear axle crossbeam, its further feature is, the mistake of the end of described cross-beam body to interlude The original position crossing section is integrally closer in the middle of described cross-beam body than the spring holder of torsion beam rear axle.

Described torsion beam rear axle crossbeam, its further feature is, two longitudinal edges of each described reinforcing plate and Interior end edge in the middle of described cross-beam body is formed with flange, and the centre of described reinforcing plate is formed with and takes the shape of the letter U in reinforcing plate Concave bar.

Described torsion beam rear axle crossbeam, its further feature is that the outer end of described reinforcing plate is formed with weakening strength Structure, to allow the torsional displacement in the flexible scope of reinforcing plate.

Described torsion beam rear axle crossbeam, its further feature is that the length of each described reinforcing plate is for described crossbeam originally The 1/4 of body, the starting point of described concave bar is located at the centre of the length of described changeover portion.

Described torsion beam rear axle crossbeam, its further feature is that described reinforcing plate is more towards the portion that cross-beam body is middle Part is the closer to the belly of cross-beam body.

The aforementioned features of the present invention with respect to existing torsion beam rear axle crossbeam can eliminate produce fatigue a series of because Element.

The aftermentioned brief description of joint and specific embodiment are carried out more detailed by the object defined above of the present invention, feature and advantage Thin illustration.

Brief description

Fig. 1 is the upward view of torsion beam rear axle in the embodiment of the present invention.

Fig. 2 is the rearview of torsion beam rear axle in the embodiment of the present invention.

Fig. 3 is the profile of the line A-A along along Fig. 2.

Fig. 4 is the profile of the line B-B along along Fig. 2.

Fig. 5 is the profile of the line C-C along along Fig. 2.

Fig. 6 is the rearview of embodiment of the present invention middle-end reinforcing plate.

Fig. 7 is the upward view of embodiment of the present invention middle-end reinforcing plate.

Fig. 8 is the half-sectional view along its length of embodiment of the present invention middle-end reinforcing plate.

Specific embodiment

In aftermentioned embodiment, the orientation such as forward and backward, upper and lower term is usually to be installed on vehicle body with torsion beam rear axle State is reference.

As shown in Figure 1, Figure 2, Figure 3 shows, torsion beam rear axle includes crossbeam 1, two longerons 2, spring holder 4, damper bracket, wheel Support etc..Crossbeam 1 has the cross-beam body that cross section becomes U-shaped.As shown in figure 3, two longitudinal edges of cross-beam body carry longitudinally Flange 10,11.As shown in Fig. 2 left and right two ends 12 belly of cross-beam body will exceed interlude 15 belly, surmount is h, crossbeam There is changeover portion 14 end 12 of body to interlude 15, is provided with two reinforcing plates 16, two reinforcing plates 16 are from horizontal stroke inside cross-beam body The different ends of beam body are respectively to the centre extension of cross-beam body, the both sides of reinforcing plate 16 and crossbeam basis as shown in Figures 3 to 5 The side wall of body connects.

In the preferred embodiment, the width of longitudinal flange 10,11 is more than more than 2 times of the thickness of slab of cross-beam body.

In the preferred embodiment, the belly at both ends 12 exceeds the surmount h about centre of interlude belly The 20% of section 15.

In the preferred embodiment, as shown in Fig. 2 the reinforcement structure such as changeover portion 14 spring holder 4 to be crossed, it is more It is close to inner side, cross over the section width that width w is no less than crossbeam 1.

In the preferred embodiment, length L of reinforcing plate 16 is about the 1/4 of cross-beam body length, such as Fig. 6 and Tu Shown in 7, its two longitudinal edge and interior end edge edge have flange 160,161, Intermediate Gray concave bar 17 respectively, and concave bar 17 is in reinforcing plate U-shaped is become, as shown in figure 1, its starting point is located at changeover portion 14 on 16（Width w）Centre.As shown in fig. 7, the outer end of reinforcing plate 16 There is weakening strength structure 162, weakening strength structure 162 is, for example, in two breach 162, and the outer end of reinforcing plate 16 and crossbeam 1 The welding of side will be interrupted, and be so beneficial to the torsional displacement that elastic range can occur and do not interfere.As shown in figure 8, reinforcing plate 16 Sectional median plane center line be similar to half recessed bar parabola, more the part towards in the middle of cross-beam body is the closer to cross-beam body Belly.

Inventor is found by practice, and the torsional rigidity of torsion beam rear axle depends greatly on crossbeam section structure In pattern and crossbeam two ends strengthening version etc. structure design combination to be counted, the front and back position of other such as crossbeams, longeron shape Shape and section, spring holder and damper bracket, wheel stand etc. all require to be difficult to big change due to general layout etc., reverse The main cause that fatigue fracture in beam crossbeam shirt rim is derived from 2 aspects：Stress suffered by a certain scope section produces larger torsion Angular displacement, this scope section opposing torsional deformation ability are weaker, so proposing every improvement of the present invention.

Claims

1. torsion beam rear axle crossbeam is it is characterised in that include the cross-beam body that cross section becomes U-shaped, two longitudinal edges of cross-beam body Marginal zone has longitudinal flange, and the two ends belly of described cross-beam body will exceed interlude belly, the end of described cross-beam body in Between section have changeover portion, be provided with two reinforcing plates inside described cross-beam body, two reinforcing plates are from the different ends of cross-beam body respectively The extension in the middle of cross-beam body, the side wall of the both sides of each reinforcing plate and cross-beam body connects, and the width of described longitudinal flange is big In more than 2 times of crossbeam thickness of slab, the two ends belly of described cross-beam body will exceed the 20% of interlude height than interlude belly, institute The leap width stating changeover portion is not less than cross-beam body cross-sectional width, the changeover portion of the end of described cross-beam body to interlude Original position be integrally closer in the middle of described cross-beam body than the spring holder of torsion beam rear axle, two of each described reinforcing plate indulge Interior end edge to edge and in the middle of described cross-beam body is formed with flange, and the centre of described reinforcing plate is formed with to be strengthened The concave bar taking the shape of the letter U on plate, part more towards in the middle of cross-beam body for the described reinforcing plate is the closer to the belly of cross-beam body.

2. torsion beam rear axle crossbeam as claimed in claim 1 is it is characterised in that to be formed with intensity weak for the outer end of described reinforcing plate Change structure, to allow the torsional displacement in the flexible scope of reinforcing plate.

3. torsion beam rear axle crossbeam as claimed in claim 1 is it is characterised in that the length of each described reinforcing plate is described crossbeam The 1/4 of body, the starting point of described concave bar is located at the centre of the length of described changeover portion.