CN100387449C - Torque beam suspension - Google Patents
Torque beam suspension Download PDFInfo
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- CN100387449C CN100387449C CNB031485901A CN03148590A CN100387449C CN 100387449 C CN100387449 C CN 100387449C CN B031485901 A CNB031485901 A CN B031485901A CN 03148590 A CN03148590 A CN 03148590A CN 100387449 C CN100387449 C CN 100387449C
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- trailing arm
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Abstract
To suppress increase in size of both end parts of a torsion beam to the minimum extent to reduce material cost and welding cost and increase effective length of the torsion beam capable of being twisted and deformed to ensure durability of a welded part. A torsion beam type suspension is constituted by connecting connection parts 19 at both ends of the torsion beam 11 having U-shaped cross section and extending in the right and left directions of a vehicle body with trailing arms 10L, 10R on the left and right sides extending in the forward and backward directions of the vehicle body and swinging vertically. The connection part 19 is provided with a slit 20 which is formed on a longitudinal wall 17 of the torsion beam 11 and extends in the left and right directions and whose one end is opened and upper and lower flanges 17a overhanging in the forward and backward directions from upper and lower fringe parts of the slit 20. While the slit 20 is fitted into the trailing arms 10L, 10R, outer end fringes of an upper wall 16 and a lower wall and the upper and lower flanges 17a are welded on the trailing arms 10L, 10R. (C)2004,JPO.
Description
Technical field
The present invention relates to a kind of torque beam suspension, it comprises: left and right sides trailing arm, and they move to carry out vertical oscillation along the longitudinal direction extension of car body; And torque beam, it extends and has the U-shaped cross section along the horizontal direction of car body, and has interconnective upper wall, vertically wall and lower wall, and the connecting bridge at the opposed end place of this torque beam is connected on the trailing arm of the left and right sides.
Background technology
The open No.2000-94917 of Japanese patent application discloses a kind of traditional torque beam suspension.
The opposed end of the torque beam of this torque beam suspension is by being welded to connect on vertical centre portion of left and right sides trailing arm, but when this torque beam is subjected to torsional deflection owing to the difference between the vertical oscillation motion angle of left and right sides trailing arm, may have bigger stress on welding region, thereby cause durability to reduce.In the open No.2000-94917 of Japanese patent application in the disclosed suspension, the vertical width by increasing the torque beam opposed end reduces to act on stress on the welding region to increase weld length.
But, under the vertical width that makes this torque beam opposed end increases with the situation that increases weld length, the following problem of meeting appearance: the opposed end change of this torque beam is big, thereby not only causes material cost to increase, so and owing to the weld length increase also causes the welding cost increase.And also following problem can occur: the rigidity of the opposed end of torque beam increases, and this torque beam is difficult to torsional deflection thus.Therefore, but the effective length of the torsional deflection of this torque beam centre portion reduce, thereby cause the stress on welding region further to increase.
The opposed end of the torque beam of traditional suspension is connected with vertical centre portion of left and right sides trailing arm, and this torque beam forms has the U-shaped cross section, and open its front surface or rear surface, thereby it is easily owing to torsional deflection appears in difference between the vertical oscillation motion angle of left and right sides trailing arm.When the moment of torsion Liangqi was shaped as the U-shaped with aforesaid opening portion, stress concentrated on the open end edge part especially easily.
With opening portion its is shaped as that torque beam of U-shaped normally forms by punching press, so open end edge partly comprises tangent plane and section.If big stress is in these lip-deep words, then crackle begins from the section edge that especially has unstable apparent order and condition to produce easily.Therefore, generally by polishing with make level and smooth and this edge of rounding of open end edge part, thereby prevent to crack.
The open No.2000-52733 of Japanese patent application discloses a kind of suspension, and wherein for fear of polishing process, this operation can increase the machinework cost, round by the edge of mold pressing with the open end edge part.
But, when the edge being rounded by mold pressing, in order to make the radius of curvature that rounds part stable, importantly make before the mold pressing open end surface portion accurately the location and apparent order and condition is stablized and cooperation at pressing mold in quality control.In order to keep the quality of batch manufacturing workpiece, must give one's full attention to breaking and wearing and tearing of pressing mold, thereby cause the operating cost of these moulds to increase.
Summary of the invention
Therefore, the size that first purpose of the present invention is to reduce the torque beam opposed end increases, thereby reduces material cost and welding cost, but and increase the effective length of the torsional deflection of torque beam, thereby guarantee the durability of welding region.
Second purpose of the present invention be, need not polish or the situation of mold pressing under prevent from reliably to crack in the ora terminalis part at torque beam, this torque beam has the open section of U-shaped.
In order to realize first purpose, in accordance with a first feature of the invention, provide a kind of torque beam suspension, it comprises: left and right sides trailing arm, they move so that carry out vertical oscillation along the longitudinal direction extension of car body; And torque beam, it is a U-shaped along horizontal direction extension and its cross sectional shape of car body, this torque beam has interconnective upper wall, vertical wall and lower wall, connecting bridge at the opposed end place of described torque beam is connected with described left and right sides trailing arm, in the described connecting bridge each comprises the slit that is formed on the described vertical wall, one end opening and the horizontal expansion of this slit, and last lower flange stretches out from the last lower edge of described slit in a longitudinal direction, and under described slit has been assemblied in state on the described trailing arm, described upward lower flange and the described external end edge of going up lower wall are welded on each trailing arm, and the welding region of the welding region of last lower flange and the external end edge of last lower wall disposes in the mode that is separated from each other in a lateral direction at car body.
By above-mentioned layout, the slit of an end opening is formed in the vertical wall of connecting bridge, and it is that the opposed end of the torque beam of U-shaped is connected with trailing arm that these connecting bridges make cross sectional shape; These slits are assemblied in above the trailing arm, and go up lower flange and stretch out from the last lower edge of these slits, and the external end edge of the last lower wall of torque beam is welded on the trailing arm.Therefore, can be by the rigidity that these slits reduce these connecting bridges be set, reducing the size of these connecting bridges at the opposed end place of torque beam simultaneously increases, thereby material cost and welding cost have been reduced, but can increase the torsional deflection effective length of this torque beam thus, and can reduce the stress that acts on the welding region, thereby guarantee durability.
Specifically, because these flanges stretch out from the last lower edge of these slits in a longitudinal direction, thus can increase fore-and-aft distance from the welding region of the external end edge of last lower wall to the welding region of flange, thus the prenex rigidity of suspension increased.Be assemblied in above the trailing arm by these slits that will be arranged in torque beam, thereby this torque beam and these trailing arms relative to each other are provided with, improved bonding accuracy thus.
In order to realize first purpose,, except first feature, form the groove shape otch on described on the external end edge of lower wall, and these otch are located partly to be welded on the described trailing arm at their interior periphery according to second feature of the present invention.
By top layout, the groove shape otch that is formed in the external end edge of lower wall is partly located to be welded on the trailing arm at their interior periphery.Therefore, just needn't weld the bight of front and back end of the external end edge of lower wall, can prevent that therefore scolder from being peeled off from these bights and cause the reduction durability.
In order to realize this second purpose, according to the 3rd feature of the present invention, provide a kind of torque beam suspension, it comprises: left and right sides trailing arm, they move to carry out vertical oscillation along the longitudinal direction extension of car body; And torque beam, it is a U-shaped along horizontal direction extension and its cross sectional shape of car body, it has interconnective upper wall, vertical wall and lower wall, connecting bridge at the opposed end place of described torque beam is connected with described left and right sides trailing arm, wherein bandy flange is formed on described going up at least one of lower wall, and the direction of described bent flanges tilts in 40 °-60 ° scope with respect to the perpendicular movement track of described torque beam.
By top layout, bandy flange is formed on its cross sectional shape be U-shaped and have interconnective upper wall, vertically at least one in the last lower wall of the torque beam of wall and lower wall, and the direction of these bent flanges is with respect to 40 °-60 ° of the perpendicular movement track inclinations of torque beam.Therefore, can reduce stress on the top that acts on bent flanges.Therefore, can prevent the generation of crackle, and need not the ora terminalis of torque beam is polished or mold pressing, help to reduce the machinework cost thus.
From the following explanation of preferred embodiment and will understand above and other objects of the present invention, feature and advantage in conjunction with the accompanying drawings.
Description of drawings
Fig. 1-10 demonstrates first embodiment of the present invention, wherein:
Fig. 1 is the planar view of whole torque beam suspension;
Fig. 2 is the transparent view of whole torque beam suspension;
Fig. 3 is by the enlarged drawing of parts of 3 expressions in Fig. 1;
The cutaway view that Fig. 4 cuts open for the 4-4 line in Fig. 3;
The cutaway view that Fig. 5 cuts open for the 5-5 line in Fig. 3;
The cutaway view that Fig. 6 cuts open for the 6-6 line in Fig. 3;
The cutaway view that Fig. 7 cuts open for the 7-7 line in Fig. 3;
The cutaway view that Fig. 8 cuts open for the 8-8 line in Fig. 3;
Fig. 9 is the decomposition diagram of trailing arm and torque beam;
Figure 10 demonstrates the torque beam that is in the torsional deflection state;
But Figure 11 is and the similar view according to second embodiment of the invention of Fig. 3;
But Figure 12 is and the similar view according to third embodiment of the invention of Fig. 3;
But Figure 13 is and the similar view according to four embodiment of the invention of Fig. 3;
Figure 14-17 demonstrates the 5th embodiment of the present invention, wherein:
Figure 14 is the planar view of whole torque beam suspension;
The enlarged view that Figure 15 sees for arrow 15 directions in Figure 14;
The amplification view of Figure 16 for cutting open along the 16-16 in Figure 14; And
The diagram of curves of Figure 17 for concerning between the angle of bent flanges and the stress.
The specific embodiment
Describe now with reference to Fig. 1-10 pair of first embodiment of the present invention.
As shown in Fig. 1 and 2, the torque beam suspension that is used for automobile back wheel comprise the left and right sides trailing arm 10L that extends along the car body longitudinal direction and 10R and transversely direction extend and make left and right sides trailing arm 10L and the interconnective torque beam 11 of 10R.Cylindrical trailing arm strut member 12,12 is welded on the front end of trailing arm 10L and 10R, and is moved to carry out vertical oscillation on car body by the hinged support of rubber bush joint (not shown) that is contained in the trailing arm strut member 12,12.Left and right sides trailing wheel W, W are supported on the axle 14,14 rotationally, and this is fixed on the axle bearing plate 13,13 on the outer back end that is welded on trailing arm 10L and 10R.The spring perch 15,15 that is used for supporting the axle spring lower end is located at the place, the inner at trailing arm 10L and 10R rear portion.
From Fig. 3-9, as can be seen, be U-shaped at torque beam 11 its cross sectional shapes of front openings, and have interconnective upper wall 16, vertical wall 17 and lower wall 18 along the car body direction.Connecting bridge 19,19 has the width that vertically increases a little at its opposed end place.Slit 20 at its lateral outer ends place opening is formed in the vertical wall 17, and this vertical wall 17 rises along the perpendicular direction of each connecting bridge 19 of torque beam 11.Last lower flange 17a and 17b stretch out backward from the last lower edge of slit 20.This slit 20 has circular lateral inner ends, so that reduce stress concentration, thereby has prevented the crackle generation.
Among left and right sides trailing arm 10L and the 10R each is a hollow part, has the first half 21 and the lower part 22 that are welded to each other in their periphery office to one.Basically smooth the first pontes 21a and the second smooth basically connecting bridge 21b are formed on the first half 21, and the 3rd smooth basically connecting bridge 22a and the 4th smooth basically connecting bridge 22b are formed on the lower part 22.
The right connecting bridge 19 of torque beam 11 is connected with right trailing arm 10R in the following ways: the slit in the vertical wall 17 of torque beam 11 is assemblied in above the trailing arm 10R; The outer end of upper wall 16 is welded on the first pontes 21a of the first half 21 at the w2 place; The flange 17a that is positioned at slit 20 tops is welded on the second connecting bridge 21b of the first half 21 at the w3 place; The outer end of lower wall 18 is welded on the 3rd connecting bridge 22a of lower part 22 at the w4 place; And the flange 17b that is positioned at slit 20 belows is welded on the 4th connecting bridge 22b of lower part 22 at the w5 place.
Identical at the structure of torque beam 11 and the part of left trailing arm 10L junction and right connecting bridge 19 with the said structure of the part of right trailing arm 10R junction at torque beam 11.
In having the torque beam suspension of said structure, as the left and right sides trailing arm 10L that is used to support left and right sides wheel W, W and 10R because transverse force during motor turning or inhomogeneous road surface and during with the different angles vertical oscillation, torsional deflection by torque beam 11 produces restoring force, is used for making the angle equilibrium of left and right sides trailing arm 10L and 10R.
One end opening of slit 20,20 and being formed on is arranged in the vertical wall 17 of each connecting bridge 19,19 at opposed end place that the cross section is the torque beam 11 of U-shaped, slit 20,20 is assemblied in trailing arm 10L and above the 10R, and the last lower flange 17a that stretches out from the last lower edge of slit 20,20 and the upper wall 16 of 17b and torque beam 11 and the external end edge of lower wall 18 are welded on trailing arm 10L and the 10R at w2 to w5.Therefore, even will reduce in the recruitment of the size of each connecting bridge 19,19 at the opposed end place of torque beam 11, to reduce material cost and welding cost, also may reduce the rigidity of connecting bridge 19,19, thereby can carry out elastic deformation by flange 17a and the 17b that forms slit 20,20 or only be formed in the part place of slit 20,20 by welding at w3 and w5 place.Therefore, but can increase the effective length of torsional deflection of the core of torque beam 11, and reduce the stress that acts on the welding region w2 to w5, thereby guarantee durability.
In addition, because flange 17a and 17b stretch out forward from the last lower edge of slit 20,20, so the zone that is welded on w2 and w4 from the external end edge of upper wall 16 and lower wall 18 increases to the fore-and-aft distance that flange 17a and 17b are welded on the zone at w3 and w5 place, therefore trailing arm 10L and 10R can form them and be difficult to swing in horizontal surface, thereby have improved the prenex rigidity of suspension.And torque beam 11 and trailing arm 10L and 10R can be positioned opposite to each other, thereby cause bonding accuracy to improve.
Now with reference to Figure 11 second embodiment of the present invention is described.
In this second embodiment, in the outer end of the upper wall 16 of torque beam 11 and lower wall 18, be formed with otch 16a and the 16b that is shaped as the half elliptic reaming, and the inside circumference of these otch 16a and 16b is welded on w2 and w4 place.This layout needn't be welded the bight a and the b of front and back end of the outer end of upper wall 16 and lower wall 18, and stress concentration appears in bight a and b easily, can prevent that therefore welding from peeling off from bight a and b, thereby improve durability.
Now with reference to Figure 12 the 3rd embodiment of the present invention is described.
In the 3rd embodiment, the opposed end of torque beam 11 by independent parts 11 ', 11 ' form.More particularly, vertically the part of each is cut open at the opposed end place of torque beam 11 in wall 17 and upper wall 16 and the lower wall 18, and with separate part 11 ' fit in the cut-away portions and welding thereon.With the same in first and second embodiments, each separate part 11 ' have slit 20 and flange 17a and 17b.According to the 3rd embodiment, compare by the situation that single parts form with wherein identical shaped torque beam, since the torque beam 11 that has vertical increase width at its opposed end place by separate part 11 ', 11 ' form, so can reduce the needed width of this material, thereby cause material efficiency to improve.
Now with reference to Figure 13 the 4th embodiment of the present invention is described.
Opposite with first to the 3rd embodiment, all do not have spring perch 15 according to the trailing arm 10L of the 4th embodiment torque beam suspension and each among the 10R, and the cross section be the torque beam 11 of U-shaped along the car body direction at rear side place opening.Also with good grounds the 4th embodiment can realize and similar in the first embodiment function and effect.
Describe referring now to Figure 14-17 pair of the 5th embodiment of the present invention.
From Figure 14-16, as can be seen, be formed with the crooked flange 16a that is inclined upwardly at sweep a place at the opening leading edge place of the upper wall 16 of torque beam 11.Torque beam 11 is in vertical motion the axis L that the center that is centered on is a trailing arm strut member 12 under its torsional deflection situation.With the angle [alpha] bending, this tangent line T is on around the circular arc C of axis L and pass sweep a with respect to tangent line T for bent flanges 16a.The structure of other parts of this torque beam suspension is with identical in the first embodiment.
Curve in Figure 17 demonstrates the variation with respect to the variation (referring to axis of abscissa) of the bent angle alpha of the bent flanges 16a of torque beam 11 of the stress located at the interior location (the position i in Figure 16) on the top of external position on the top of bent flanges 16a (the position o in Figure 16) and bent flanges 16a.Position externally, stress increases in bent angle alpha is equal to or less than 20 ° zone; This stress is in 20 °-60 ° the scope constant substantially in bent angle alpha; And stress reduces in bent angle alpha is equal to or greater than 60 ° zone.At interior location i place, stress increases in bent angle alpha is equal to or less than 50 ° zone; This stress is in 50 °-60 ° the scope constant substantially in bent angle alpha; And stress reduces in bent angle alpha is equal to or greater than 60 ° zone.Therefore, if angle of bend is set at 40 °-60 °, then can will externally suppress for being equal to or less than acceptable numerical value, thereby can prevent the generation of crackle reliably, and need not to polish or the top of mold pressing bent flanges 16a with the stress at interior location o and i place.Why can be reduced in the reason of stress of top end of bent flanges 16a as follows by form bent flanges 16a on upper wall 16:
The same as shown in Figure 10, as the left and right sides trailing arm 10L that is used to support left and right sides wheel W, W and 10R during with different angle vertical oscillation, from the front, torque beam 11 bends to S shape, and the part of torque beam 11 (for example representing) vertical curve (speaking by the book) along the direction of the tangent line T that is passed in the sweep a among Figure 16 by reference number A.When the thickness of bent flanges 16a is represented by t, and the height of bent flanges 16a by h represent (＞t) time, if this bent flanges 16a is along the direction bending as the tangent line T of the track of its perpendicular movement, if i.e. α=0, then the section factor Za of this bent flanges 16a equals th
2/ 6, this is a maxim.On the other hand, if the direction of bent flanges 16a is vertical with the direction of tangent line T, if i.e. α=90 °, then the section factor Za of this bent flanges 16a equals ht
2/ 6, this is a minimum value.
The size of the moment M at the part A place in Figure 10 can be considered to constant, and with the orientation independent of bent flanges 16a, therefore, the flexure stress σ=M/Z that acts on the bent flanges 16a depends on section factor Z.Therefore, when section factor Z shows as maxim Za (when α=0 °), flexure stress σ=M/Z shows as minimum value, and when section factor Z shows as minimum value Za (when α=90 °), flexure stress σ=M/Z shows as maxim.
But, because the rubber bush joint is installed in the office, hinged support portion of trailing arm 10L and 10R, so the actual hunting motion center and the axis L of each among trailing arm 10L and the 10R depart from (referring to Figure 15 and 16), thereby when when the torsional capacity angle [alpha] of the characteristic of rubber bush joint and torque beam 11 is in 40 ° to 60 ° scope, rather than when angle [alpha] equaled 0 °, the stress on bent flanges 16a showed as minimum value.
Though embodiment of the present invention are had been described in detail, it being understood that under the situation that does not break away from spirit of the present invention and protection domain and can make various improvement in design.
For example, flange 16a is formed in the 5th embodiment on the upper wall 16 of torque beam 11, but this bent flanges can be formed on the lower wall 18, perhaps is formed on upper wall 16 and lower wall 18 on both.
In addition, bent flanges 16a can be in Figure 16 the either side of tangent line T tilt, and as long as angle [alpha] is in 40 ° to 60 ° scope, though then this bent flanges along with in Figure 16 by the same opposite sense inclination shown in the dotted line, also can realize identical effect.
In addition, it is opening that torque beam 11 is located in its front side in the 5th embodiment, but can be at its rear side place opening.
Claims (2)
1. torque beam suspension, it comprises: left and right sides trailing arm, they extend along the longitudinal direction of car body and move so that carry out vertical oscillation; And torque beam, it extends and its cross sectional shape is a U-shaped along the horizontal direction of car body, and this torque beam has interconnective upper wall, vertically wall and lower wall, and the connecting bridge at the opposed end place of described torque beam is connected with described left and right sides trailing arm,
In the wherein said connecting bridge each comprises the slit that is formed on the described vertical wall, one end opening and the horizontal expansion of this slit, and last lower flange stretches out from the last lower edge of described slit in a longitudinal direction, and under described slit has been assemblied in state on the described trailing arm, described upward lower flange and the described external end edge of going up lower wall are welded on each trailing arm, and described welding region and the described welding region of going up the external end edge of lower wall of going up lower flange disposes in the mode that is separated from each other in a lateral direction at car body; And the described lower flange of going up is arranged on the described torque beam integratedly.
2. torque beam as claimed in claim 1 is characterized in that, be formed with the groove shape otch on the external end edge of lower wall on described, and these groove shape otch is located partly to be welded on the described trailing arm at their interior periphery.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002196219A JP3944012B2 (en) | 2002-07-04 | 2002-07-04 | Torsion beam suspension |
| JP2002196220A JP4282956B2 (en) | 2002-07-04 | 2002-07-04 | Torsion beam suspension |
| JP196219/2002 | 2002-07-04 | ||
| JP196220/2002 | 2002-07-04 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101074869A Division CN100551729C (en) | 2002-07-04 | 2003-07-04 | Torque beam suspension |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1495054A CN1495054A (en) | 2004-05-12 |
| CN100387449C true CN100387449C (en) | 2008-05-14 |
Family
ID=34277056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031485901A Expired - Fee Related CN100387449C (en) | 2002-07-04 | 2003-07-04 | Torque beam suspension |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100387449C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100457486C (en) * | 2004-07-21 | 2009-02-04 | 日产自动车株式会社 | Wheel suspension system |
| CN103123288B (en) * | 2006-03-03 | 2016-03-16 | 芙罗服务管理公司 | Load measurement method and device |
| JP4301307B2 (en) * | 2007-03-01 | 2009-07-22 | トヨタ自動車株式会社 | Torsion beam suspension |
| ITTO20070941A1 (en) * | 2007-12-27 | 2009-06-28 | Sistemi Sospensioni Spa | CROSSBEAM FOR A REAR SUSPENSION WITH TORCENT BRIDGE FOR MOTOR VEHICLES |
| CN103097152B (en) * | 2010-07-23 | 2015-08-05 | 本田技研工业株式会社 | Torsional beam type suspension device |
| JP5703062B2 (en) * | 2011-02-25 | 2015-04-15 | フタバ産業株式会社 | Torsion beam suspension |
| EP2952371B2 (en) * | 2013-01-30 | 2021-08-25 | Nippon Steel & Sumitomo Metal Corporation | Torsion beam, torsion beam assembly, torsion beam-type suspension device |
| JP6136523B2 (en) * | 2013-04-23 | 2017-05-31 | スズキ株式会社 | Torsion beam suspension |
| CN106627011A (en) * | 2017-02-24 | 2017-05-10 | 浙江春风动力股份有限公司 | All terrain vehicle rear rocker arm |
| JP6893637B2 (en) * | 2017-07-27 | 2021-06-23 | 株式会社ワイテック | Vehicle torsion beam structure |
| CN113525013A (en) * | 2021-07-20 | 2021-10-22 | 安徽大昌科技股份有限公司 | Combined type torsion beam longitudinal arm structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000052733A (en) * | 1998-08-13 | 2000-02-22 | Toyota Motor Corp | Torsion beam type rear suspension and manufacture of torsion beam |
| CN1249246A (en) * | 1998-09-25 | 2000-04-05 | 丰田自动车株式会社 | Torsion beam suspension |
| US6047978A (en) * | 1997-02-27 | 2000-04-11 | Toyota Jidosha Kabushiki Kaisha | Wheel suspension by trailing arms and torsion beam assembled by welding with means for relieving weld seam from high stress |
| JP2001113925A (en) * | 1999-10-21 | 2001-04-24 | Honda Motor Co Ltd | Torsion beam suspension |
-
2003
- 2003-07-04 CN CNB031485901A patent/CN100387449C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6047978A (en) * | 1997-02-27 | 2000-04-11 | Toyota Jidosha Kabushiki Kaisha | Wheel suspension by trailing arms and torsion beam assembled by welding with means for relieving weld seam from high stress |
| JP2000052733A (en) * | 1998-08-13 | 2000-02-22 | Toyota Motor Corp | Torsion beam type rear suspension and manufacture of torsion beam |
| CN1249246A (en) * | 1998-09-25 | 2000-04-05 | 丰田自动车株式会社 | Torsion beam suspension |
| JP2001113925A (en) * | 1999-10-21 | 2001-04-24 | Honda Motor Co Ltd | Torsion beam suspension |
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|---|---|
| CN1495054A (en) | 2004-05-12 |
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Granted publication date: 20080514 Termination date: 20160704 |