torsion beam suspension
A torsion beam suspension, torsion beam technology, applied in suspension, elastic suspension, transportation and packaging, etc., can solve problems such as durability decline, peeling, and weight increase, and achieve the effect of preventing adverse effects
Active Publication Date: 2015-08-05
HONDA MOTOR CO LTD
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Problems solved by technology
[0009] However, in the torsion beam type suspension device described in the above-mentioned Patent Document 1, since the trailing arm portion and the torsion beam portion are overlapped and welded, there is a problem that the weight increases due to the overlapped portion.
[0010] Therefore, if the tailor-welded blank described in the above-mentioned Patent Document 2 is used in the torsion beam type suspension device, the increase in weight can be prevented, but there is a problem that the stress in the tailor-welded blank is Concentration of welded ends causes peeling, which causes a decrease in durability
In the invention of the above-mentioned Patent Document 2, the stress concentration on the welded portion is alleviated by forming notches on both sides of the welded end portion of the edge of the tailored welded blank. Cracks, which may reduce the durability of the torsion beam suspension
Method used
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Embodiment 1
[0077] Such as figure 1 As shown, the torsion beam suspension device S of the vehicle is formed in an H shape as a whole, and has a pair of left and right trailing arms 11, 11 extending substantially along the vehicle body front and rear direction, and two trailing arms 11 extending along the vehicle body left and right direction. , 11 the torsion beam 12 connected to the middle part of the front-back direction.
[0078] The upper half of the left and right longitudinal arms 11, 11 and the torsion beam 12 are made of tailor welded blanks 13 (refer to Figure 7 )constitute. Tailored welded blanks 13 are formed by butting and welding the second blanks 13b, 13b having a small thickness and the first blank 13a having a large thickness, and by pressing them, an upper member 16 can be obtained. The member 16 integrally has the torsion beam part 14 formed from the 1st blank 13a, and the left and right trailing arm parts 15 and 15 formed from the 2nd blank 13b and 13b. By using suc...
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A torsion beam type suspension device is provided in which a trailing arm part (15) and a torsion beam part (14) are formed as a unit by press-forming a tailored blank material in which end parts of plate materials having different thicknesses are butt-welded via a weld part. A weld part (17) of the tailored blank material comprises a U-shaped cross section in which front and rear side wall portions (32, 33) are connected via a bottom wall portion (31), and a pair of cutouts (34a, 34b; 35c, 35d) are formed at the edge of each of the side wall portions (32, 33) at positions sandwiching the weld part (17), and therefore, when the torsion beam part (14) is twistedly deformed, shifting the concentration of stress from the weld part (17) to the cutout (34a, 34b; 35c, 35d) enables peeling apart of the weld end part to be prevented and the durability of the torsion beam type suspension device to be enhanced.
Description
technical field [0001] The present invention relates to a torsion beam type suspension device, which includes: extending along the front-rear direction of the vehicle body, the front end is pivotally supported on the vehicle body so as to be able to swing up and down, and the rear end supports the wheel shaft as a freely rotatable left and right longitudinal arm. part; a torsion beam part extending along the left-right direction of the vehicle body and connected to the left and right longitudinal arm parts at both ends, wherein the longitudinal arm part and the torsion beam part are integrally formed by stamping tailor-welded blanks, The tailor-welded blanks are formed by butting end portions of plates having different thicknesses and welding them at the welded portions. Background technique [0002] According to the following Patent Document 1, there is known a technique in which the left and right trailing arm portions and the torsion beam portion of a torsion beam suspens...
Claims
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IPC IPC(8): B60G9/04
CPCB60G2206/8102B60G2206/20B60G2206/8201B60G2206/722B60G21/051B60G2200/23
Inventor 大堂孝树森理史冈崎崇藤田匠
Owner HONDA MOTOR CO LTD