JP2006192932A - Rear suspension device of automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rear suspension device of an automobile capable of improving riding comfort by reducing vibration transmitted from rear wheels to a vehicle body. <P>SOLUTION: A suspension cross member 5 is provided with a pair of left and right side members 16 directed in the vehicle body longitudinal direction and cross members 14 and 15 for connecting a pair of side member parts 16 directed in the vehicle width direction. As three pairs of mount parts for connecting each of the side members 16 to the vehicle body, a front side mount part 32 with an elastic body disposed at a front end part of each of the side members 16, a rigid rear side mount part 34 disposed at a rear end part of each of the side members 16 and a rigid intermediate mount part 33 disposed between the front side mount part 32 and the rear side mount part 34 of each of the side members 16 are provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention includes a suspension cross member that swingably supports an end portion of a suspension arm on the inner side of a vehicle body, and the suspension cross member is connected to the vehicle body by a total of six mount portions on one side. The present invention relates to a rear suspension device.

  Conventionally, as a rear suspension device of this type of automobile, there is one described in German Patent No. 19615207 (DE19615207C1). As shown in FIG. 8 and FIG. 9 only on one side, a total of three elastic mount parts, a front end mount part 92, an intermediate mount part 93, and a rear end mount part 94, are arranged on the rear suspension frame 91. As shown in FIG. 8, the elastic mount portions 92 to 94 are arranged on a straight line on a line 95 extending in the front-rear direction of the vehicle body in a plan view, and the mount portions 92 to 94 are connected in a side view as shown in FIG. Straight lines 96 to 98 are arranged to form a triangle.

  In a conventional general rear suspension device, the suspension cross member is supported on the vehicle body by a total of four elastic mount portions on the left and right. In this case, since the input load input from the wheel side is supported at four points, it is necessary to set the spring constant of the elastic mount portion to a certain extent.

However, as shown in FIGS. 8 and 9, if three elastic mount portions on one side and six on the left and right sides are adopted, the spring constant of the elastic mount portions 92 to 94 can be lowered, and the ride comfort can be improved. As shown in FIG. 9, since the load can be received on the triangular surface, the lateral rigidity can be improved. In particular, when the elastic mounts 92 to 94 are arranged in a straight line on the line 95, the elastic center is located on the line 95 when the vertical load is input, and an unnecessary moment is not generated, which is advantageous in terms of rigidity of the rear suspension device. It improves both ride comfort and handling stability.
German Patent No. 19615207

  The rear suspension device described in Patent Document 1 employs a total of six elastic mounts on one side, so that although the spring constant of the mount can be set low, riding comfort can be improved. Since the point mounts are all made of elastic mounts that incorporate rubber bushes, the rigidity of the vehicle body (especially torsional rigidity) can be strengthened by effectively utilizing the suspension cross member, such as when used in open-body vehicles. I can't.

Conventionally, it is also known that the suspension cross member is connected to the vehicle body by four mounting portions, and all the four mounting portions are formed as rigid mounting portions.
Therefore, it is also conceivable to connect the suspension cross member of the above-described rear suspension device to the vehicle body by six rigid mount portions. However, in this case, all the vibrations from the rear wheels are directly transmitted to the vehicle body, so the road noise propagating to the passenger compartment is deteriorated and the riding comfort is lowered.

  The rear suspension apparatus for an automobile according to claim 1 is a rear suspension apparatus for an automobile provided with a suspension cross member that swingably supports an end portion of the suspension arm on the inner side of the vehicle body. A pair of left and right side members extending in the vehicle width direction, and a cross member extending in the vehicle width direction and connecting the pair of side member portions to each other, and connecting each of the pair of side members to the vehicle body 3 As a set of mount portions, a front mount portion disposed at the front end portion of the side member, a rear mount portion disposed at the rear end portion of the side member, a front mount portion and a rear mount portion of the side member, An intermediate mount portion disposed between the intermediate mount portion and the rear mount portion for rigidly connecting the side member to the vehicle body, Und unit is characterized in that is adapted to couple through the elastic body side member to the vehicle body.

  Here, the rear suspension device may be configured as a double wishbon type in which the suspension arm has an upper arm and a lower arm, and the cross member among the suspension cross members includes a front cross member and a rear cross member. It is good also as a structure which has.

  In this rear suspension device, each of the pair of left and right side members of the suspension cross member is connected to the vehicle body by a total of six mount portions on one side, three points on the front mount portion, intermediate mount portion, and rear mount portion. Therefore, the lateral rigidity of the rear suspension device is improved. Moreover, since the intermediate mount portion and the rear mount portion are configured to rigidly connect the side member to the vehicle body, the lateral rigidity of the rear suspension device is further improved, and the vehicle body is effectively reinforced by the suspension cross member. Thus, the vehicle body rigidity (particularly torsional rigidity) can be enhanced.

  Therefore, the rear suspension device is suitable for use in an automobile that is disadvantageous in terms of vehicle body rigidity, such as an open body type automobile. In addition, since the front-most front mount portion is configured to connect the side member to the vehicle body via an elastic body, the front-side mount portion propagates from the rear wheel to the vehicle body as compared to a case where the front mount portion is configured as a rigid mount portion. Vibration can be reduced and riding comfort can be improved.

  According to a second aspect of the present invention, there is provided a vehicle rear suspension apparatus according to the first aspect, wherein the suspension arm is swingably connected to an upper end portion of a wheel support member that rotatably supports a wheel and swingable to the side member. An upper lateral arm having two upper connecting portions to be connected, and a two-point lower connecting portion that is swingably connected to the vicinity of the lower end of the wheel support member and swingably connected to the side member. A lower lateral arm, and the intermediate mount portion is disposed between the two upper connecting portions and in front of the rear lower connecting portion in a plan view.

  Therefore, most of the lateral force acting from the upper lateral arm and the lower lateral arm can be shared by the intermediate mount portion and the rear mount portion that are rigidly connected to the vehicle body, so that the lateral rigidity of the rear suspension device is increased. At the same time, the spring constant of the elastic body of the front mount portion can be lowered to increase the ride comfort.

  According to a third aspect of the present invention, there is provided a rear suspension apparatus for an automobile according to the second aspect, wherein the suspension arm is swingably connected to a substantially middle height portion of a front end portion of a wheel support member and swingable to a side member. The toe control link to be connected has a toe control link disposed in front of the intermediate mount portion in plan view. Therefore, during cornering, the side force input from the rear wheel causes the toe control link to deflect the portion of the side member in front of the intermediate mount portion toward the inside of the vehicle body, and by using this bending, the rear wheel is moved in the toe-in direction. The steering stability can be improved.

  According to the first aspect of the present invention, the suspension cross member is connected to the vehicle body by the mount portions of three points on one side for a total of six points, so that the lateral rigidity of the rear suspension device is improved. In addition, since the intermediate mount portion and the rear mount portion rigidly connect the side members to the vehicle body, the lateral rigidity of the suspension device is further improved, and the vehicle body is effectively reinforced by the suspension cross member to enhance the vehicle body rigidity (particularly torsional). Rigidity) can be strengthened.

  Therefore, the rear suspension device is suitable for use in an automobile that is disadvantageous in terms of vehicle body rigidity, such as an open body type automobile. In addition, since the front-most front mount portion is configured to connect the side member to the vehicle body via an elastic body, the front-side mount portion propagates from the rear wheel to the vehicle body as compared to a case where the front mount portion is configured as a rigid mount portion. Vibration can be reduced and riding comfort can be improved.

  According to the invention of claim 2, since most of the lateral force acting from the upper lateral arm and the lower lateral arm can be shared by the intermediate mount portion and the rear mount portion that are rigidly connected to the vehicle body, In addition to increasing the lateral rigidity of the suspension device, the spring constant of the elastic body of the front mount portion can be lowered to increase the ride comfort.

  According to the invention of claim 3, during cornering, the toe control link bends the portion of the side member in front of the intermediate mount portion inward of the vehicle body by the lateral force input from the rear wheel, and uses this bending. Thus, the rear wheels can be directed in the toe-in direction, and the steering stability can be improved.

The rear suspension apparatus for an automobile according to the present invention includes a suspension cross member that swingably supports the end of the suspension arm on the vehicle body inner side. The suspension cross member includes a pair of left and right side members extending in the longitudinal direction of the vehicle body, and a cross member extending in the vehicle width direction and connecting the pair of side member portions.
As a set of three mounting portions for connecting each of the pair of side members to the vehicle body, a front mounting portion disposed at the front end portion of the side member and a rear mounting portion disposed at the rear end portion of the side member And an intermediate mount portion disposed between the front mount portion and the rear mount portion of the side member. The intermediate mount portion and the rear mount portion rigidly connect the side member to the vehicle body, and the front mount portion is configured to connect the side member to the vehicle body via an elastic body.

  An automobile rear suspension apparatus according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a power unit 3 including an engine 1 and a transmission 2 is arranged at the front of an open body type vehicle so as to constitute a drive system of an FR (front engine / rear wheel drive) system. The rear differential device 4 is disposed at the rear of the automobile, and the output shaft 2 a of the transmission 2 and the input shaft of the rear differential device 4 are connected by a propeller shaft 6.

The rotational force of the engine 1 is transmitted in the order of the transmission 2, the universal joint 8, the propeller shaft 6, the universal joint 9, and the rear differential device 4, and the left and right rear wheels are driven via the axle shafts 7 and 7. The case of the power unit 3 and the case of the rear differential device 4 are connected by a power plant frame 10 extending in the vehicle front-rear direction.
The power plant frame 10 is a frame that allows movement in the roll direction from the engine drive system, while preventing the rear differential device 4 from winding up. The power plant frame 10 has high bending rigidity and flexibility with respect to torsion. It is configured.

  The main part of the power plant frame 10 is formed in a rectangular closed cross-sectional structure as shown in FIG. 2A, and in the vicinity of the attachment part to the transmission case and the attachment part to the differential case, it is shown in FIG. Thus, the cross section is formed in a U-shape.

Next, the rear suspension device 11 will be described with reference to FIGS.
As shown in FIGS. 3 and 4, the rear suspension device 11 is a multi-link suspension device among double wishbone suspension devices that independently suspend left and right rear wheels, and is configured to be substantially symmetrical to the left and right. Has been. The rear suspension device 11 includes a suspension cross member 5 that supports the end of the suspension arm on the inner side of the vehicle body in a swingable manner.

  As shown in FIGS. 3 and 4, the suspension arms are provided on the right side and the left side of the automobile, respectively, but the suspension arms on one side are more than the front and rear lower lateral arms 12F and 12R and the lower lateral arms 12F and 12R. It is composed of front and rear upper lateral arms 13F and 13R having a short arm length.

  The suspension cross member 5 includes a pair of curved left and right side members 16 and 16 extending in the longitudinal direction of the vehicle body and a pair of side members 16 and 16 extending in the vehicle width direction so as to be rigidly connected to each other. The front cross member 14 and the rear cross member 15 are configured in a frame shape in plan view.

  As shown in FIGS. 4 and 5, the rear lower lateral arm 12R is formed to be longer than the upper lateral arms 13F, 13R. The outer end of the lower lateral arm 12R has a wheel support 17 (wheel support member). ) Is pivotally supported by a rear extension 17a through a hard elastic bush, and a lower connecting portion at the inner end of the lower lateral arm 12R is swung through a hard elastic bush at the lower portion of the rear cross member 15. It is freely pivoted.

  As shown in FIGS. 4 and 5, the outer end of the front lower lateral arm 12F is pivotally supported by the lower extension 17c of the wheel support 17 via a hard elastic bush so as to be able to swing inside the lower lateral arm 12F. The lower connecting portion at the end is pivotally supported on the lower surface of the front portion of the side member 16 via a hard elastic bush. The outer end portions of the upper arms 13F and 13R are swingably connected to the upper extension portion 17b (upper end portion) of the wheel support 17 via the ball joint 18, and are connected to the upper ends of the inner ends of the upper arms 13F and 13R. The part is pivotally supported by the front part and the rear part of the side member 16 via a hard elastic bush 19 and a bracket 20 so as to be swingable.

  The outer end portion of the control link 22 is pivotally supported by a front extension portion 17d at a middle height position of the wheel support 17 through a ball joint so that the inner end portion of the control link 22 is a front portion of the side member 16. The upper surface is pivotably supported. Further, a stabilizer 25 is held by a bracket 23 and a holder 24 on the rear surface portion of the rear cross member 15, and this stabilizer 25 suppresses a roll angle at the time of bumping only one wheel or rebounding by its torsional rigidity.

  As shown in FIGS. 3 to 5, a damper 30 is provided between the inwardly extending portion 17 e of the wheel support 17 and the body. The damper 30 includes an upper seat 26, a lower seat 27, a coil spring 28, and a strut 29. I have. The damper 30 is disposed between the front and rear apparel arms 13F and 13R. Further, as shown in FIG. 4, a reinforcing member 31 is stretched obliquely between the front lower surface of the side member 16 and the front vertical wall of the rear cross member 15.

  As shown in FIG. 3, as a pair of mount parts for connecting each of the pair of side members 16, 16 to the vehicle body, a front mount part 32 disposed at the front end of the side member 16, A rear mount portion 34 disposed at the rear end portion and an intermediate mount portion 33 disposed between the front mount portion 32 and the rear mount portion 34 of the side member 16 are provided, and the intermediate mount portion 33 is provided. The rear mount portion 34 rigidly connects the side member 16 to the vehicle body, and the front mount portion 32 is configured to connect the side member 16 to the vehicle body via an elastic body.

  As shown in FIG. 3, the front mount portion 32, the intermediate mount portion 33, and the rear mount portion 34 each having three points on one side are arranged in the front-rear direction, and the intermediate mount portion 33 and the rear side in the plan view shown in FIG. The mount portion 34 is disposed so that the line connecting them is substantially parallel to the vehicle body center line L2 extending in the vehicle longitudinal direction. Further, the intermediate mount portion 33 is disposed so as to be located on the vehicle body inner side with respect to the straight line L1 connecting the front mount portion 32 and the rear mount portion 34, and the vehicle width between the left and right intermediate mount portions 33, 33 The span of the direction is shortened.

  Here, both end portions of the front cross member 14 are fixed to portions of the left and right side members 16 between the front mounting portion 32 and the intermediate mounting portion 33, and both end portions of the rear cross member 15 are fixed to the left and right side members 16. It is fixed to a portion between the intermediate mount portion 33 and the rear mount portion 34. Therefore, the inner end portion of the rear lower lateral arm 12 </ b> R is pivotally supported by the rear cross member 15 between the intermediate mount portion 33 and the rear mount portion 34. The damper 30 is disposed in the vicinity of the intermediate mount portion 33 between the intermediate mount portion 33 and the rear mount portion 34.

  As shown in FIG. 1, the engine 1 is supported on the vehicle body via brackets 37 and 37 and engine mounts 38 and 38 that extend outward in the vehicle width direction from both left and right portions. The rear differential member 4 is attached to the rear cross member 15 via brackets 35, 35 fixed to the front vertical wall.

  As shown in FIGS. 3 and 5, the side member 16 is formed in a curved shape that protrudes inward in the vehicle width direction in plan view, and its front portion extends obliquely downward toward the vehicle body outer side direction. Is formed. As shown in FIG. 5, the intermediate mount portion 33 and the rear mount portion 34 are provided on substantially the same horizontal plane as viewed from the side, while the front mount portion 32 is positioned on the vehicle body lower side than the horizontal plane. It is provided at the front end of the member 16. A bracket 39 is provided at the lower portion of the front mount portion 32 and extends forward from the lower portion in the vehicle outward direction.

  The structure of the intermediate mount portion 33 and the rear mount portion 34 that rigidly connect the side member 16 to the vehicle body will be described. As shown in FIG. 6, a flanged sleeve body 40 is fitted into a circular hole formed in the side member 16, and a reinforcing plate 42 is fixed to the rear side frame 41 of the vehicle body so as to correspond to the sleeve body 40. A synthetic resin or metal thick sleeve 43 is fitted and fixed to the sleeve body 40, and a metal circular plate 43a is disposed on the lower end side of the thick sleeve 43, and the thick sleeve 43 and the circular plate 43a are disposed. The side member 16 is rigidly connected to the vehicle body by screwing the bolts 44 inserted through to the reinforcing plate 42.

  The structure of the front mounting portion 32 that connects the side member 16 to the vehicle body via an elastic body will be described. As shown in FIG. 7, a flanged sleeve body 45 is fitted into a circular hole formed in the side member 16, and a reinforcing plate 46 is fixed to the rear side frame 41 of the vehicle body so as to correspond to the sleeve body 45. A thick sleeve-like elastic body block 47 is fitted and fixed to the sleeve body 45, and the side member 16 is elastically attached to the vehicle body by screwing a bolt 48 inserted through the elastic body block 47 into the reinforcing plate 46. It is connected. The elastic body block 47 includes a metal inner cylinder 47a, a rubber bush 47b fitted to and fixed to the inner cylinder 47a (corresponding to an elastic body), a metal sleeve 47c fitted and fixed to the rubber bush 47b, and a rubber bush 47b. A flange plate 47d fixed to the lower end and externally fitted to the inner cylinder 47a is integrally formed.

The operation and effect of the rear suspension device 11 will be described.
Since each of the pair of left and right side members 16 of the suspension cross member 5 is connected to the vehicle body by a total of six points on one side, three points on the front side mounting portion 32, the intermediate mounting portion 33, and the rear mounting portion 34, The lateral rigidity of the air suspension device 11 is improved. Moreover, since the intermediate mount portion 33 and the rear mount portion 34 are configured to rigidly connect the side member 16 to the vehicle body, the lateral rigidity of the rear suspension device 11 is further improved, and the vehicle body is supported by the suspension cross member 5. Can be effectively reinforced to enhance vehicle body rigidity (particularly torsional rigidity).

  Therefore, the rear suspension device 11 is suitable for use in an automobile that is disadvantageous in terms of vehicle body rigidity, such as an open body type automobile. In addition, since the front-most front mounting portion 32 is configured to connect the side member 16 to the vehicle body via the elastic body (47b), the rear mounting portion 32 is rearward compared to a case where the front mounting portion 32 is configured as a rigid mounting portion. It is possible to improve the ride comfort by reducing the vibration propagating from the wheel to the vehicle body.

  The suspension arms are swingably connected to the upper end portion of the wheel support 17 and upper lateral arms 13F and 13R having two upper connection portions that are swingably connected to the side member 16, and the lower end of the wheel support 17. Lower lateral arms 12F and 12R having two lower connecting portions that are swingably connected to the vicinity and are swingably connected to the side member 16, and the intermediate mount portion 33 has the two points in plan view. Since most of the lateral force acting from the upper lateral arms 13F and 13R and the lower lateral arms 12F and 12R is rigidly connected to the vehicle body. Since the intermediate mount portion 33 and the rear mount portion 34 can be shared, the rear suspension device To increase the lateral stiffness of 1, it is possible to improve the riding comfort by reducing the spring constant of the elastic body of the front mounting part 32.

  Further, since the toe control link 22 is disposed in front of the intermediate mount portion 33 in a plan view, the toe control link 22 is located in front of the intermediate mount portion 33 due to a lateral force input from the rear wheel during cornering. By deflecting the side member 16 inward of the vehicle body and utilizing this bending, the rear wheels can be directed in the toe-in direction, and steering stability can be improved.

  Since the intermediate mount portion 33 and the rear mount portion 34 are arranged so that the line connecting them is substantially parallel to the vehicle body center line extending in the vehicle longitudinal direction, the engine roll is particularly attached to the suspension cross member 5. When acting, since the input load is received by the intermediate mount portion 33 and the rear mount portion 34, no twisting occurs, and the riding comfort can be improved and the noise can be reduced. Further, since the intermediate mount portion 33 is disposed on the vehicle body inner side than the line connecting the front mount portion 32 and the rear mount portion 34 in a plan view, the span between the left and right intermediate mount portions 33 is shortened. As a result, it is possible to reduce the shock and vibration when the engine roll acts on the suspension cross member 5, and it is possible to suppress a decrease in steering stability.

  The cross member of the suspension cross member 5 includes a front cross member 14 having both ends fixed to a portion between the front mount portion 32 and the intermediate mount portion 33 of the left and right side members 16, 16, and the left and right side members. 16 and 16, a rear cross member 15 having both ends fixed to a portion between the intermediate mount portion 33 and the rear mount portion 34 is provided. The differential device 4 is supported by the rear cross member 15, and the rear cross member 15 is supported. Since both end portions of the member 15 are fixed to the portion between the intermediate mount portion 33 and the rear mount portion 34 of the left and right side members 16, 16, vibration force from the engine, particularly engine roll, is applied to the suspension cross member 5. When applied, this input load can be shared by both the intermediate mount portion 33 and the rear mount portion 34. Since it is, the spring constant of the elastic body of the front mounting portion 32 that can be lowered, it is possible to achieve the comfort improve ride, to improve the steering stability.

  The intermediate mount portion 33 and the rear mount portion 34 are disposed on substantially the same horizontal plane in a side view, and the front mount portion 32 is disposed on the lower side of the vehicle body from the horizontal plane. The mount 33 and the rear mount 34 receive vibrations from the engine, and allow torsion of the portion where the front mount 32 located on the lower side of the vehicle body from the horizontal plane is disposed, and the elasticity of the front mount 32 is allowed. The body's spring constant can be reduced to improve riding comfort, and transmission of road noise to the passenger compartment can be reduced.

  Since the front mount portion 32, the intermediate mount portion 33, and the rear mount 34 are arranged in a triangular shape in plan view, the natural frequency is improved, the differential vibration can be reduced, and the suspension cross member 5 can be reduced in weight. In addition, since the intermediate elastic mount 33 is disposed on the inner side of the vehicle body from the line connecting the front end mount portion 32 and the rear mount 34, the span between the left and right intermediate mount portions 33, 33 is shortened. As a result, it is possible to reduce the vibration when the engine roll due to the action of the power plant frame 10 acts on the suspension cross member 5, and it is possible to suppress a decrease in steering stability.

  In addition, both end portions of the rear cross member 15 are fixed between the intermediate mount portion 33 and the rear mount portion 34 of the left and right side members 16, 16, and the rear differential device 4 is supported by the rear cross member 15. When the vibration from the engine acts on the suspension cross member 5 via the rear differential device 4, the vibration can be shared mainly between the intermediate mount portion 33 and the rear mount portion 34.

Next, a modification example in which the rear suspension device 11 according to the embodiment is partially changed will be described.
1) It is also possible to change the rear suspension device type from a multi-link type to a pure double wishbon type. In this case, the two upper lateral arms 13F and 13R of the suspension arm may be constituted by one upper lateral arm, and the two lower lateral arms 12F and 12R may be constituted by one lower lateral arm.

  2) The structure of the suspension cross member 5 shows an example, and suspension cross members having various structures can be employed.

  3) The structure of the intermediate mount portion 33 and the rear mount portion 34 shown in FIG. 6 employs a thick sleeve 43 and a circular plate 43a instead of the elastic body block 47 in the front mount portion 32 of FIG. Compatible with elastic mount part. However, the structure of the mount parts 33 to 34 is not limited to the structure shown in FIGS. 6 and 7, and mount parts having various structures can be employed.

  4) In addition, those skilled in the art can implement the present invention by adding various modifications without departing from the spirit of the present invention, and the present invention includes those various modifications. .

1 is a plan view of an automobile drive system and a rear suspension device according to an embodiment of the present invention. It is sectional drawing of a power plant frame. It is sectional drawing of a power plant frame. It is a top view of a rear suspension apparatus. It is a bottom view of a rear suspension device. The side view of the principal part of a rear suspension apparatus. It is sectional drawing of an intermediate | middle mount part and a rear side mount part. It is sectional drawing of a front side mount part. It is a principal part top view of the conventional suspension cross member. It is a side view of the suspension cross member of FIG.

Explanation of symbols

4 Rear differential device 5 Suspension cross member 10 Power plant frame 11 Rear suspension device 12F, 12R Lower lateral arm 13F, 13R Apparel arm 14 Front cross member 15 Rear cross member 16 Side member 32 Front mount portion 33 Intermediate mount portion 34 Rear side Mount part

Claims (3)

In a rear suspension device for an automobile provided with a suspension cross member that swingably supports an end of the suspension arm on the inner side of the vehicle body,
The suspension cross member includes a pair of left and right side members extending in the longitudinal direction of the vehicle body, and a cross member extending in the vehicle width direction and connecting the pair of side member portions to each other. As three sets of mount portions for connecting each of the members to the vehicle body, a front mount portion disposed at the front end portion of the side member, a rear mount portion disposed at the rear end portion of the side member, and a side member An intermediate mount portion disposed between the front mount portion and the rear mount portion is provided,
The intermediate mount portion and the rear mount portion rigidly connect the side member to the vehicle body, and the front mount portion is configured to connect the side member to the vehicle body via an elastic body.
A rear suspension device for an automobile. The suspension arm is swingably connected to an upper end portion of a wheel support member that rotatably supports a wheel and has an upper lateral arm having two upper connecting portions that are swingably connected to the side member;
A lower lateral arm having a two-point lower connecting portion that is swingably connected to a lower end vicinity portion of the wheel support member and is swingably connected to a side member;
The intermediate mount portion is disposed between the two upper connecting portions and in front of the rear lower connecting portion in a plan view.
The rear suspension device for an automobile according to claim 1. The suspension arm is a toe control link that is swingably connected to a substantially middle height portion of the front end portion of the wheel support member and is also swingably connected to a side member. The rear suspension apparatus for an automobile according to claim 2, further comprising a toe control link disposed in front of the section.

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