CN207241350U - Automobile rear torsion beam suspension - Google Patents

Abstract

The utility model automobile rear torsion beam suspension, belongs to automobile component field, it is therefore an objective to the bonding strength between tire support and trailing arm is improved, to there is the cracking probability of the weld seam between reduction tire support and trailing arm.Including torsion beam and the trailing arm for being fixed on torsion beam both ends；Trailing arm is fixedly arranged at the front end with the rear axle body support frame being connected with vehicle body, the rear end of trailing arm is welded to connect the tire support for being useful for installation tire, in tire support extension is fixedly connected with close to one end of trailing arm front end, extension one end is fixedly connected on tire support and extends close to one end of trailing arm front end, the other end along the axis of trailing arm to the front end of trailing arm；Extension is welded to connect with trailing arm.The utility model, by in extension, increasing tire support and the weld seam of trailing arm welding, the stress of trailing arm and the weld seam bottom of tire support is scatter, concentrated so as to avoid weld seam bottom stress and cause weld cracking, improve the intensity and safety coefficient of tire support and trailing arm welding position.

Description

Automobile rear torsion beam suspension

Technical field

The utility model belongs to automobile component field, particularly automobile rear torsion beam suspension.

Background technology

Torsion beam semi-independent suspension is currently used rear overhang hanging hang structure, passes through the V-arrangement or channel section of an entirety Torsion beam the trailing arm of the left and right sides is welded together, making strand formula by rubber-metal support and vehicle body in the front end of trailing arm connects Connect, be connected in the rear end of trailing arm with wheel hub, damper and spring.The trailing arm of torsion beam can be swung up and down around rigid connection point so as to Vibrations are absorbed by damper and damping spring, play the role of shock-absorbing, when both sides Suspension Deformation does not wait, torsion beam is turned round Change shape, because the torsion beam has larger elasticity, stabilizer bar can be played the role of.Therefore torsion beam is that torsion girder-like half is only Critical component in vertical suspension, it plays the role of power transmission, stress and connection balance both sides, and suspension be related to it is Vehicle handling And comfort.

In the prior art, as shown in figure 3, trailing arm is in curved rod-shaped, tire support extends close to the end of trailing arm front end Bending part to trailing arm curature variation stops, being welded to trailing arm due to the tire support of torsion beam together with, i.e. tire branch The bending part of the weld seam of frame and trailing arm to trailing arm curature variation stops, when meeting steering situation or uneven road surface, torsion beam Weld seam between tire support and trailing arm is easily cracking.

Utility model content

It is strong that technical problem to be solved in the utility model is to provide a kind of connection improved between tire support and trailing arm Degree, to there is girl after the automobile of the cracking probability of the weld seam between reduction tire support and trailing arm to turn beam suspension.

The technical solution adopted in the utility model is：Automobile rear torsion beam suspension, including torsion beam and it is fixed on torsion beam The trailing arm at both ends；Trailing arm is fixedly arranged at the front end with the rear axle body support frame being connected with vehicle body, and the rear end of trailing arm, which is welded to connect, to be useful for pacifying The tire support of tire is filled, extension, the extension are fixedly connected with close to one end of trailing arm front end in the tire support One end is fixedly connected on tire support and extends close to one end of trailing arm front end, the other end along the axis of trailing arm to the front end of trailing arm； The extension is welded to connect with trailing arm.

Further, the extension is integrated part with tire support.

Further, the arc-shaped transition in junction of the extension and tire support.

Further, the weld seam between the extension and trailing arm is a continuous weld.

Further, the length of the extension is 30-50mm.

The beneficial effects of the utility model are：The utility model, by the tire support close to trailing arm front end one End set along the extension of trailing arm axis and with the extension that trailing arm is welded to connect, increase the weldering of tire support and trailing arm welding Seam, the stress of trailing arm and the weld seam bottom of tire support is scatter, and is concentrated so as to avoid weld seam bottom stress and is caused weld seam Cracking, substantially increases the intensity and safety coefficient of tire support and trailing arm welding position.

Brief description of the drawings

Fig. 1 is the utility model structure diagram；

Fig. 2 is the utility model tire support and trailing arm connection diagram；

Fig. 3 is tire support in the prior art and trailing arm connection diagram.

In figure, torsion beam 1, trailing arm 2, rear axle body support frame 3, tire support 4, extension 5.

Embodiment

The utility model is described further with reference to the accompanying drawings and examples as follows：

Automobile rear torsion beam suspension, as depicted in figs. 1 and 2, including torsion beam 1 and the trailing arm for being fixed on 1 both ends of torsion beam 2；Trailing arm 2 is fixedly arranged at the front end with the rear axle body support frame 3 being connected with vehicle body, and the rear end of trailing arm 2, which is welded to connect, is useful for installation tire Tire support 4, be fixedly connected with extension 5, the extension 5 one close to one end of 2 front end of trailing arm in the tire support 4 End is fixedly connected on tire support 4 and prolongs close to one end of 2 front end of trailing arm, the other end along the front end of axis to the trailing arm 2 of trailing arm 2 Stretch；The extension 5 is welded to connect with trailing arm 2.

Torsion beam 1 is critical component in the semi-independent suspension of torsion girder-like, plays the work of power transmission, stress and connection balance both ends With, when both ends Suspension Deformation, torsion beam 1 deforms, to torsion beam 1 and trailing arm 2 and tire support 4 and trailing arm 2 Level weld seam requirement is very high, it is easy to so that the weld seam between torsion beam 1 and trailing arm 2, tire support 4 and trailing arm 2 cracks, so that Influence the security of vehicle.

The utility model, by prolonging in the tire support 4 close to what one end of 2 front end of trailing arm was set along 2 axis of trailing arm Extension 5 that is stretching and being welded to connect with trailing arm 2, increases the weld seam that tire support 4 is welded with trailing arm 2, by trailing arm 2 and tire The stress of the weld seam bottom of stent 4 scatter, and is concentrated so as to avoid weld seam bottom stress and causes weld cracking, substantially increased Tire support 4 and the intensity and safety coefficient of 2 welding position of trailing arm.It should be noted that weldquality will be got well, it is ensured that intensity energy Enough meet the requirements, it is impossible to phenomena such as solder skip, weld seam is not uneven, full, burn-through occur.

In order to improve the globality of extension 5 and tire support 4, to avoid extension 5 and tire support 4 because of external force effect Generation fracture etc. destroys, so that influence to improve tire support 4 and the intensity of 2 welding position of trailing arm and the effect of safety coefficient, it is excellent Choosing, the extension 5 is integrated part with tire support 4.

In order to avoid the junction of extension 5 and tire support 4 occurs phenomena such as stress concentration, further avoiding extension 5 destroy with tire support 4 because external force acts on, it is preferred that the arc-shaped mistake in junction of the extension 5 and tire support 4 Cross.

In order to which further trailing arm 2 and the stress of the weld seam bottom of tire support 4 scatter, so as to avoid weld seam bottom Stress concentration causes weld cracking, substantially increases the intensity and safety coefficient of tire support 4 and 2 welding position of trailing arm.It is preferred that , the weld seam between the extension 5 and trailing arm 2 is a continuous weld.

The longer the better for extension 5, but in order to avoid being interfered with vehicle body miscellaneous part, therefore, extension 5 cannot mistake It is long, it is still, undesirable to the stress effect of improvement herein if extension 5 extends less than 30mm, it can't resolve what is cracked herein Problem.If extension 5 does not interfere more than 50mm, and with vehicle body miscellaneous part, but can increase materials, cause to waste. Therefore, it is preferred that the length of the extension 5 is 30-50mm.

Claims (5)

1. automobile rear torsion beam suspension, including torsion beam (1) and the trailing arm (2) for being fixed on torsion beam (1) both ends；Trailing arm (2) The rear axle body support frame (3) being connected with vehicle body is fixedly arranged at the front end with, the rear end of trailing arm (2) is welded to connect the tire for being useful for installation tire Stent (4), it is characterised in that：Extension (5) is fixedly connected with close to one end of trailing arm (2) front end in the tire support (4), Described extension (5) one end is fixedly connected on tire support (4) close to one end of trailing arm (2) front end, and the other end is along trailing arm (2) Axis extends to the front end of trailing arm (2)；The extension (5) is welded to connect with trailing arm (2).

2. automobile rear torsion beam suspension as claimed in claim 1, it is characterised in that：The extension (5) and tire support (4) It is integrated part.

3. automobile rear torsion beam suspension as claimed in claim 1 or 2, it is characterised in that：The extension (5) and tire support (4) the arc-shaped transition in junction.

4. automobile rear torsion beam suspension as claimed in claim 1 or 2, it is characterised in that：The extension (5) and trailing arm (2) Between weld seam be a continuous weld.

5. automobile rear torsion beam suspension as claimed in claim 1 or 2, it is characterised in that：The length of the extension (5) is 30-50mm。