JP2010137736A - Suspension member structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce weight by obtaining strength and rigidity necessary for a suspension member by a simple structure. <P>SOLUTION: A suspension member structure includes a suspension member 12 including an arm member 28 that becomes an attaching part to a front side member 20 (a vehicle body); and an arm support 36 for supporting a suspension arm 34 by a vehicle front sidewall 30 and a vehicle rear sidewall 32. The arm member 28 is set at the same position as the arm support 36 when the vehicle is viewed from above and connected to at least one of the vehicle front sidewall 30 and the vehicle rear sidewall 32 in the arm support 36 so as to be overlapped with each other. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a suspension member structure.

It consists of a member body in which an upper member (upper arm) and a lower member (lower arm) are joined by welding or the like, and a pipe that penetrates the inside of the member body in the left-right direction, and body attachment portions are formed at the left and right ends of the pipe A suspension member is disclosed (see Patent Document 1). A suspension member having a cross member positioned in the center and extending in the vehicle width direction of the vehicle, and a left member and a right member as side members joined to the left and right ends of the cross member, the cross member being formed of a pipe material is provided. It is disclosed (see Patent Document 2).
JP-A-11-115796 Japanese Patent Application Laid-Open No. 2004-216989

  In general, the suspension member structure needs to support the lower arm of the suspension, the engine torque rod, and the like, and ensure the rigidity and strength necessary to receive input from them.

  However, in the conventional examples described in Patent Document 1 and Patent Document 2 described above, the vehicle front side mounting position of the lower arm with respect to the suspension member is set at a position offset from the body mounting portion in plan view of the vehicle. It is irrational to receive power for the input. In addition, the structure is complicated, and it is considered that a considerable amount of mass is necessary to ensure the necessary rigidity and strength.

  In view of the above facts, an object of the present invention is to reduce the weight of the suspension member with a simple structure so that the necessary strength and rigidity can be obtained.

  The invention according to claim 1 includes a suspension member including an arm member serving as a mounting portion to the vehicle body, and an arm support portion that supports the suspension arm by a wall portion on the vehicle front side and a wall portion on the vehicle rear side, The arm member is set at the same position as the arm support portion in a plan view of the vehicle, and is overlapped and joined to at least one of the wall portion on the vehicle front side and the wall portion on the vehicle rear side in the arm support portion.

  In the suspension member structure according to claim 1, the arm member that is the attachment portion of the suspension member to the vehicle body is set at the same position as the arm support portion that supports the suspension arm in a vehicle plan view, and the vehicle in the arm support portion. Since it is overlapped and joined to at least one of the front wall portion and the vehicle rear wall portion, the arm support portion and the suspension arm have high coupling rigidity and strength, and the suspension can be applied to the input from the suspension arm. The necessary strength and rigidity can be obtained as a member. Since the strength and rigidity required for the suspension member can be obtained with such a simple structure, the weight of the suspension member can be reduced.

  According to a second aspect of the present invention, in the suspension member structure according to the first aspect, the engine torque rod that connects the engine and the suspension member, and the suspension member structure are arranged at the same position as the engine torque rod in the vehicle width direction. And a suspension member for connecting the suspension member and a vehicle body part located on the opposite side of the engine torque rod in the vehicle longitudinal direction, and receiving an input from the engine torque rod in the axial direction.

  In the suspension member structure according to claim 2, the engine torque rod for connecting the engine and the suspension member is disposed at the same position as the engine torque rod in the vehicle width direction. The suspension member is connected to the vehicle body part located on the opposite side of the direction and the suspension member and receives the input from the engine torque rod in the axial direction. Directional rigidity can be increased.

  According to a third aspect of the present invention, in the suspension member structure according to the second aspect, the vehicle body portion is a tunnel portion provided on the floor panel and extending in the vehicle front-rear direction.

  In the suspension member structure according to claim 3, since the vehicle body portion is a tunnel portion provided on the floor panel and extending in the vehicle front-rear direction, input from the engine to the suspension member via the engine torque rod is performed via the connecting member. As a result, the floor panel can be efficiently transmitted to the relatively high rigidity tunnel portion.

  As described above, according to the suspension member structure according to the first aspect of the present invention, the strength and rigidity necessary for the suspension member can be obtained with a simple structure, and the light weight can be reduced. Is obtained.

  According to the suspension member structure of the second aspect, it is possible to obtain an excellent effect that the rigidity of the suspension member in the vehicle longitudinal direction at the position of the engine torque rod can be increased.

  According to the suspension member structure according to claim 3, the input from the engine to the suspension member via the engine torque rod is efficiently transmitted to the relatively high rigidity tunnel portion of the floor panel via the connecting member. The excellent effect of being able to be obtained is obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, the suspension member structure S according to the present embodiment relates to the suspension member structure at the front portion of the vehicle 10, for example, and includes a suspension member 12, an engine torque rod 14, and a connecting member 16.

  First, the structure of the front part of the vehicle 10 will be described. A central side member 18 that is a vehicle body skeleton member extends in the vehicle front-rear direction at both sides in the vehicle width direction at the lower part of the vehicle. As shown in FIGS. 1 and 2, the front side member 20 connected to the front side of the center side member 18 has curved portions 20 </ b> A and 20 </ b> B that bend in the vehicle width direction and the vehicle vertical direction, for example. The bending portion 20A is located at the rear end portion of the front side member 20, and is, for example, convexly curved toward the vehicle lower side and curved convexly toward the inside in the vehicle width direction. The bending portion 20B is located on the front side of the vehicle with respect to the bending portion 20A. For example, the bending portion 20B is convexly curved toward the vehicle upper side and is curved convexly outward in the vehicle width direction. Of the front side member 20, a portion 20C on the vehicle front side from the curved portion 20B extends along the vehicle front-rear direction. The portion 20C is located on the vehicle upper side than the central side member 18.

  A floor panel 22 is provided between the central side members 18 on both sides. At the center of the floor panel 22 in the vehicle width direction, for example, a tunnel portion 24 is provided that is convex on the vehicle upper side and extends in the vehicle longitudinal direction. Further, as shown in FIG. 1, an engine 26 is disposed between the front side members 20 on both sides.

  1 and 2, the suspension member 12 has a suspension arm 34 formed by an arm member 28 serving as an attachment portion to a front side member 20 as an example of a vehicle body, a wall portion 30 on the front side of the vehicle, and a wall portion 32 on the rear side of the vehicle. And an arm support portion 36 for supporting. Specifically, the suspension member 12 has, for example, a closed cross-sectional structure having a rectangular cross section, extends in the vehicle width direction at the center in the vehicle width direction, and extends from both ends to the vehicle width direction outer side and the vehicle front.

  The positions of the arm support portions 36 are respectively set at both end portions of the suspension member 12. The suspension arm 34 is, for example, a lower arm in a suspension device (not shown). A mounting portion 40 on the vehicle front side of the suspension arm 34 is supported by an arm support portion 36 of the suspension member 12. Further, the mounting portion 42 on the vehicle rear side of the suspension arm 34 is elastically supported by a support portion 44 provided at the rear end portion of the front side member 20 via a bolt 45 and a bush (not shown), for example.

  As shown in FIG. 1, the arm member 28 is set at the same position as the arm support portion 36 in a plan view of the vehicle. As shown in FIG. 4, the arm member 28 is overlapped and joined to at least one of the vehicle front side wall portion 30 and the vehicle rear side wall portion 32 of the arm support portion 36. In the present embodiment, the arm member 28 is overlapped and joined to both the wall portion 30 on the vehicle front side and the wall portion 32 on the vehicle rear side. In other words, share coupling is performed in consideration of the input in the vehicle width direction from the suspension arm 34.

  Specifically, as shown in FIGS. 4 and 5, the arm member 28 includes, for example, a front wall portion 28 </ b> F, a rear wall portion 28 </ b> R, an inner wall portion 28 </ b> B in the vehicle width direction, and an outer wall portion 28 </ b> A in the vehicle width direction. It has a closed cross-sectional structure. A flange 28C is provided at the lower edge of the wall 28B on the inner side in the vehicle width direction. The flange 28 </ b> C is overlapped and joined on the upper wall portion 46 of the suspension member 12. Flange 28D extended to the vehicle lower side rather than flange 28C is provided in the lower edge part of front wall part 28F and rear wall part 28R, respectively. These flanges 28 </ b> D straddle the suspension member 12 and are joined to the wall portion 30 on the vehicle front side and the wall portion 32 on the vehicle rear side so as to overlap each other.

  A through hole 50 for passing, for example, a bolt 48 that supports the mounting portion 40 of the suspension arm 34 on the vehicle front side in the vehicle front side wall portion 30 and the vehicle rear side wall portion 32 of the arm support portion 36. Is formed. The front and rear flanges 28D are formed with through holes 28E corresponding to the through holes 50, respectively.

  A flange 52 is formed at each end edge of the upper wall portion 46 of the suspension member 12 in the vehicle width direction. The flange 52 is overlapped and joined to the inner surface of the wall portion 28A on the outer side in the vehicle width direction of the arm member 28. The upper portion of the wall portion 28A on the outer side in the vehicle width direction is a pedestal portion 28G for the collar 56, and the pedestal portion 28G is provided with a through hole 28H through which the bolt 60 is passed.

  As shown in FIG. 2, a mounting bracket 58 for the suspension member 12 is fixed to the lower surface of the front side member 20. A nut 62 to which the bolt 60 (FIG. 5) is fastened is fixed to the mounting bracket 58 by, for example, welding. As shown in FIG. 4, a collar 56 is placed on a pedestal portion 28G of the arm member 28, a bolt 60 is inserted from the vehicle lower side of the pedestal portion 28G, and the bolt 60 is attached to a mounting bracket as shown in FIG. The suspension member 12 is attached to the front side member 20 by being fastened to 58 nuts 62.

  On the other hand, as shown in FIG. 4, the mounting portion 40 on the vehicle front side of the suspension arm 34 includes a through hole 28 </ b> E of the front and rear flanges 28 </ b> D in the arm member 28, and a wall portion on the vehicle front side in the arm support portion 36 of the suspension member 12. 30 and the through hole 50 provided in the rear wall portion 32 are supported by the arm support portion 36 by, for example, passing a bolt 48 from the vehicle front side and tightening a nut 64 from the vehicle rear side. As a result, the attachment portion 40 on the vehicle front side of the suspension arm 34 is supported so as to be rotatable about the vehicle front-rear direction as a rotation axis.

  In FIG. 1, the engine torque rod 14 is a kind of anti-vibration support mechanism that connects the engine 26 and the suspension member 12, and is excellent in suppressing vibration transmission from the engine 26 that is the main vibration generation source of the vehicle 10 to the vehicle body. It is used to realize a comfortable ride and to protect the vehicle body and various components attached to the vehicle body from vibration.

  As shown in FIG. 6A, the engine torque rod 14 includes a pair of rubber bushes 70 each including, for example, an outer cylinder 66, an inner cylinder (not shown), and a rubber elastic body 68, and the pair of rubber bushes 70. A connecting rod 72 for connecting the outer cylinders 66 to each other, the inner cylinder in the rubber bush 70 on the front side of the vehicle is connected to the engine 26 side, and the inner cylinder in the rubber bush 70 on the rear side of the vehicle is on the vehicle body side. The suspension member 12 is connected. For this connection, for example, a bolt 74 and a nut 76 are used. A bolt 74 is passed through the rubber bush 70 on the vehicle front side in the vehicle width direction, and a bolt 74 is passed through the rubber bush 70 on the vehicle rear side in the vehicle vertical direction. Thereby, the engine torque rod 14 is connected to the engine 26 side so as to be rotatable in the vehicle vertical direction, and is connected to the suspension member 12 side so as to be rotatable in the vehicle width direction.

  As shown in FIGS. 1 and 2, mounting brackets 78 and 80 to which the rubber bushing 70 is connected are provided on the engine 26 side and the suspension member 12 side, respectively. As shown in FIGS. 3 and 6A, the mounting bracket 80 is a pair of plate-like members fixed to the upper wall portion 46 and the lower wall portion 47 of the suspension member 12, for example. A through hole 80A for passing in the vertical direction is formed.

  1 and 2, the connecting member 16 is disposed at the same position as the engine torque rod 14 in the vehicle width direction, and a vehicle body part located on the opposite side of the engine torque rod 14 in the vehicle front-rear direction with respect to the suspension member 12. The suspension member 12 is connected to the vehicle body portion so as to receive an input from the engine torque rod 14 in the axial direction. Here, the vehicle body part is, for example, a tunnel portion 24 provided on the floor panel 22 and extending in the vehicle front-rear direction. Specifically, as shown in FIG. 6A, the connecting member 16 is fixed to, for example, a wall portion 32 on the vehicle rear side of the suspension member 12 and extends rearward of the vehicle, and is shown in FIG. As described above, a through hole 16A penetrating in the vehicle vertical direction is formed in the rear end portion 16R.

  On the other hand, a mounting bracket 82 is fixed on the lower surface side of the tunnel portion 24. A nut 86 is fixed to the mounting bracket 82 by welding, for example. The rear end portion 16R of the connecting member 16 is aligned with the lower surface of the mounting bracket 82, the bolt 84 is inserted into the through hole 16A from the lower side of the vehicle, and tightened to the nut 86, whereby the rear end portion 16R is connected to the mounting bracket 82. ing.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. 1 and 2, in the suspension member structure S according to the present embodiment, the arm member 28 that is a mounting portion of the suspension member 12 to the vehicle body is the same as the arm support portion 36 that supports the suspension arm 34 in a vehicle plan view. Since the arm support portion 36 is overlapped and joined to both the vehicle front side wall portion 30 and the vehicle rear side wall portion 32 of the arm support portion 36, the arm support portion 36 and the suspension arm 34 are coupled to each other. The strength is high, and the strength and rigidity necessary for the suspension member 12 can be obtained with respect to the input from the suspension arm 34 in the vehicle width direction, for example.

  Thus, since the strength and rigidity required for the suspension member 12 can be obtained with a simple structure, the weight of the suspension member 12 can be reduced. Moreover, since the suspension member 12 can be easily formed by such a simple structure, high-strength steel can be used as a material, thereby ensuring strength and rigidity required for the suspension member 12. However, further weight reduction can be achieved.

  In addition, the suspension member structure S according to the present embodiment is disposed at the same position as the engine torque rod 14 in the vehicle width direction, and the engine torque rod 14 that connects the engine 26 and the suspension member 12. Since the vehicle body part located on the opposite side of the engine torque rod 14 in the vehicle front-rear direction and the suspension member 12 are connected, and a connecting member 16 that receives the input from the engine torque rod 14 in the axial direction is provided. The rigidity of the suspension member 12 in the longitudinal direction of the vehicle at the position of the engine torque rod 14 can be increased.

  In particular, the vehicle body portion to which the rear end portion 16R of the connecting member 16 is connected is the tunnel portion 24 provided on the floor panel 22 and extending in the vehicle front-rear direction, so that the engine 26 via the engine torque rod 14 is connected to the suspension member 12. Can be received in the axial direction of the connecting member 16 and efficiently transmitted to the relatively high-rigidity tunnel portion 24 of the floor panel 22.

  In the present embodiment, the suspension member structure S has been described as being applied to the front portion of the vehicle 10. However, the present invention is not limited to this, and the suspension member structure S is applied to the rear portion of the vehicle 10, that is, a suspension member for a rear suspension (not shown). It is also possible. When the engine 26 is mounted on the rear portion of the vehicle 10, the engine 26 and the suspension member 12 are connected by the engine torque rod 14, and the suspension member 12 and a vehicle body part on the vehicle front side of the suspension member 12 are connected. Can be connected by the connecting member 16.

It is a top view which shows the suspension member structure provided in the front part of the vehicle. It is a perspective view which shows the suspension member structure provided in the front part of the vehicle. It is a perspective view which shows a suspension member structure. FIG. 4 is an enlarged perspective view showing a state in which an arm member is provided on an arm support portion of a suspension member, and a mounting portion on the vehicle front side of the suspension arm is supported on the arm support portion. It is an exploded perspective view showing a suspension member, an arm member, and a collar. (A) It is a 6A-6A arrow expanded sectional view in FIG. 2 which shows the connection state of an engine torque rod and a suspension member, and the connection state of the connection member extended from this suspension member to a vehicle rear, and a tunnel part. (B) It is a 6B-6B arrow expanded sectional view in FIG. 2 which shows the connection state of a connection member and a tunnel part.

Explanation of symbols

12 Suspension member 14 Engine torque rod 16 Connecting member 20 Front side member (vehicle body)
22 Floor panel 24 Tunnel part (body part)
26 Engine 28 Arm member 30 Wall portion on the front side of vehicle 32 Wall portion on the rear side of vehicle 34 Suspension arm 36 Arm support portion S Suspension member structure

Claims (3)

A suspension member including an arm member serving as a mounting portion to the vehicle body, and an arm support portion that supports the suspension arm by a wall portion on the vehicle front side and a wall portion on the vehicle rear side;
The arm member is set at the same position as the arm support part in a plan view of the vehicle, and is a suspension that is overlapped and joined to at least one of the wall part on the vehicle front side and the wall part on the vehicle rear side in the arm support part. Member structure. An engine torque rod connecting the engine and the suspension member;
A vehicle body part that is disposed at the same position as the engine torque rod in the vehicle width direction and is located on the opposite side of the engine torque rod in the vehicle front-rear direction with respect to the suspension member is coupled to the suspension member, and from the engine torque rod A connecting member that receives the input of
The suspension member structure according to claim 1.   The suspension member structure according to claim 2, wherein the vehicle body portion is a tunnel portion provided on a floor panel and extending in a vehicle front-rear direction.

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