CN101284487B

CN101284487B - Torsion girder-like rear suspension

Info

Publication number: CN101284487B
Application number: CN2008100277767A
Authority: CN
Inventors: 胡晓斌; 吕波涛
Original assignee: SAIC Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2008-04-29
Filing date: 2008-04-29
Publication date: 2011-09-21
Anticipated expiration: 2028-04-29
Also published as: CN101284487A

Abstract

The invention relates to a structure of a torsion beam-type rear suspension of an automobile; the left and the right suspension vertical arms (10) composed of pipe fittings of the torsion beam-type suspension are arranged on the two sides along the front and the back directions of the automobile; a torsion beam body (20) with a sulciform section is connected therebetween. The structure is characterized in that: the torsion beam body (20) is sulciform member with downwardly-arranged opening; the section of the torsion beam body (20) includes two trough rims (21), (22) formed by flat plate surfaces, the middle part is a smoothing curved surface transition, two ends of the torsion beam body (20) are V-shaped sections, at least one trough rim of the trough rims (21), (22) of the middle rod of the torsion beam body (20) includes two folding surfaces. The structure effectively improves the roll center of the rear suspension, solves the problems of large angle of the automobile body when the automobile is turning, and at the same time, significantly refrains the over-turning of the rear shaft when the automobile is turning, thus promoting and improving the operational stable performance of the automobile.

Description

Torsion girder-like rear suspension

Technical field

The present invention relates to automotive suspension, specifically just relate to the structure of the torsion girder-like rear suspension of automobile.

Background technology

Turn round that this body section of beam opening adopts forward substantially or backward opening is arranged in the existing torsion beam suspension, cause that to turn round the beam shear center on the low side, the rear suspension roll center is lower, causes the Ackermann steer angle vehicle roll angle bigger; Turn round between beam and the vehicle body the direct coupled mode that adopts, no transition connects support, causes installing relatively difficulty, to body mounts locate, requirement of strength is higher; The trailing arm front end adopts and is arranged in parallel, and Fig. 1 is the structural representation of the torsion beam suspension of routine in the prior art, and the trailing arm angle theta is 0 °, and in addition, bush structure design-calculated more complicated could suppress the rear axle transition and turn to, and cost is higher, development difficulty is bigger; The rear shock absorber mounting bracket adopts bolt to the formula of wearing, and difficulty is installed in the shock absorber lower end, is unfavorable for improving efficiency of assembling.

Summary of the invention

Technical matters to be solved by this invention is that a kind of torsion girder-like rear suspension will be provided, and under the situation low-cost, that efficiency of assembling is high, improves the vehicle handling and stability energy.

One of technical scheme that realizes the employing of foregoing invention purpose is: a kind of torsion beam type suspension, the left and right sides suspension trailing arm (10) that is made of pipe fitting is arranged in both sides along the vehicle fore-and-aft direction, being connected with the cross section between the two is the torsion beam body (20) of flute profile, it is characterized in that: torsion beam body (20) is the flute profile rod member, Open Side Down arranges for it, the cross section of described torsion beam body (20) comprises the trough rim (21) that two platen surface constitute, (22), the middle part is the smooth surface transition, the two ends of described torsion beam body (20) are the cross section of vee shape, the trough rim (21) of torsion beam body (20) the stage casing body of rod, (22) at least one trough rim comprises that two sections folding faces constitute in.

Technique scheme, Open Side Down arranges for the torsion beam body, overcome effectively that prior art middle section opening adopts forward or backward opening arrange cause turn round beam shear center defective on the low side, the rear suspension roll center improves relatively, has effectively improved the bigger problem of Ackermann steer angle vehicle roll angle.

Description of drawings

Fig. 1 is the birds-eye view of torsion girder-like rear suspension in the prior art;

Fig. 2 is a plan structure scheme drawing of the present invention;

Fig. 3 is the upward view of Fig. 2;

Fig. 4 is an A-A cutaway view among Fig. 3;

Fig. 5 is a B-B cutaway view among Fig. 3;

The specific embodiment

Torsion beam type suspension, the left and right sides suspension trailing arm 10 that is made of pipe fitting is arranged in both sides along the vehicle fore-and-aft direction, and being connected with the cross section between the two is the torsion beam body 20 of flute profile, and torsion beam body 20 is the flute profile rod member, and Open Side Down arranges for it.

The front end that the left and right sides suspension trailing arm 10 that links to each other with torsion beam body 20 is positioned at connecting portion is extratensive type, and transition has turned to significant inhibitory effect to the Ackermann steer angle rear axle in this improvement design.

Described torsion beam body 20 is provided with

reinforcement gusset

40,50 with the rear portion and the bottom of left and right sides suspension trailing arm 10 junctions.

The cross section of described torsion beam body 20 is V-arrangement on the whole, can obtain good anti-shear ability like this, as shown in Figure 4.

The cross section of described torsion beam body 20 comprises that two platen surface constitute

trough rim

21,22, and the middle part is the smooth surface transition, and the transition of middle part employing smooth surface can reduce the stress concentration of intermediate location effectively, referring to Fig. 4,5.

Described torsion beam body 20 can identically also can suitably be optimized in the cross section of whole bar length direction.As shown in Figure 5, at least one trough rim comprises that two sections folding faces constitute, and can further improve integral anti-shearing, bending resistance and the anti-twisting property of torsion beam body 20 like this in the

trough rim

21,22 of the stage casing body of rod of described torsion beam body 20.In conjunction with Fig. 2-5, the preferred version among the present invention is that the trough rim 21 that is positioned at the front side adopts the structure of two sections folding faces.

Described torsion beam body 20 end cross-sectional are smooth transition to the cross section of the stage casing body of rod.Like this by two ends to the middle part gradually the scheme of transition can reduce stress concentration.

Torsion beam body 20 strikes out the vee shape of variable section with steel plate, arranges down along the vehicle-width direction opening, and the two ends of its length direction keep the cross section of vee shape, is convenient to respectively to weld in center with the fore-and-aft direction of above-mentioned suspension trailing arm 10.Change in beam body 20 stamping processes, the first time forming V-shape as shown in Figure 4, on this basis, strike out U-shaped roughly once more at the middle part of turning round beam body 20, as shown in Figure 5, both sides broad section is a B-B section among Fig. 3, can guarantee the weld strength of its two ends and suspension trailing arm 10.Open Side Down arranges also to have the advantage of avoiding accumulating the earth dirt in it, reducing windage for torsion beam body 20, cooperate and strengthen

gusset

40,50 and trailing arm 10 welding, increased the intensity of weld, made torsional strength that the center of twist of torsion beam body 20 is in more weak lateral middle position relatively.

The leading section of left and right sides suspension trailing arm 10 is provided with and connects support 30, between described connection support 30 and the left and right sides suspension trailing arm 10 rubber bush 60 is set.Be connected between the mode that adopt to connect support 30 transition and the vehicle body, installs very convenient, to body mounts locate, the higher relative reduction of requirement of strength.

Suspension trailing arm 10 front ends outer subtended angle in the described left and right sides is 30 °～60 °, left and right sides suspension trailing arm 10, its outer subtended angle becomes symmetry shape with car body, outer subtended angle θ between a left side or right suspension trailing arm 10 front ends and the vehicle commander's direction is 15 °～30 ° in other words, because being positioned at the front end of connecting portion, left and right sides suspension trailing arm 10 is extratensive type, transition has turned to significant inhibitory effect to the Ackermann steer angle rear axle in this improvement design, improves and improve the vehicle handling and stability energy thereby improve, as shown in Figure 3.Suspension trailing arm 10 material selection round steel pipes in the left and right sides are arranged along the vehicle fore-and-aft direction, adopt punching press, nest folding mode to be shaped, by rubber bush 60 with is connected support 30 connections, the installation of realization trailing arm.The version of lining 60 is simplified, and reduces exploitation and manufacturing cost.

The rear end of described left and right sides suspension trailing arm 10 is provided with damper mounting pin 70.Damper mounting pin 70 is located at the rear end of above-mentioned trailing arm, adopts the trailing arm perforate, and set pin is welded on above-mentioned trailing arm tapping, is used for mounting dampers.

Claims

1. torsion beam type suspension, the left and right sides suspension trailing arm (10) that is made of pipe fitting is arranged in both sides along the vehicle fore-and-aft direction, being connected with the cross section between the two is the torsion beam body (20) of flute profile, it is characterized in that: torsion beam body (20) is the flute profile rod member, Open Side Down arranges for it, the cross section of described torsion beam body (20) comprises the trough rim (21) that two platen surface constitute, (22), the middle part is the smooth surface transition, the two ends of described torsion beam body (20) are the cross section of vee shape, the trough rim (21) of torsion beam body (20) the stage casing body of rod, (22) at least one trough rim comprises that two sections folding faces constitute in.

2. torsion beam type suspension according to claim 1 is characterized in that: described torsion beam body (20) end cross-sectional is a smooth transition to the cross section of the stage casing body of rod.

3. torsion beam type suspension according to claim 1 and 2 is characterized in that: the front end that the left and right sides suspension trailing arm (10) that links to each other with torsion beam body (20) is positioned at connecting portion is extratensive type, and its outer subtended angle becomes symmetry shape with car body.

4. torsion beam type suspension according to claim 3, it is characterized in that: the leading section of left and right sides suspension trailing arm (10) is provided with and connects support (30), between described connection support (30) and the left and right sides suspension trailing arm (10) rubber bush (60) is set, the rear end of described left and right sides suspension trailing arm (10) is provided with damper mounting pin (70).