JPH10217741A - Suspension subframe structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suspension subframe structure effectively enhancing the rigidity of a suspension subframe through a bracket. SOLUTION: In a suspension subframe structure, a suspension subframe 20 is provided with a recessed groove 21 for placing a stabilizer 30, and a bracket 10 for installing the stabilizer 30 through a bush 40 on the suspension subframe 20. Both the ends of the bracket 100 are provided with a pair of fastening parts 11 fastened to the suspension subframe 20 by striding over the recessed groove 21. A connecting part 123 connected to the bush is provided between each fastening part 11 of the bracket 10. The connecting part 12 is offset in the bottom direction of the recessed groove 21 with respect to each fastening part 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a suspension subframe structure for supporting a suspension arm swinging with wheels on a vehicle body.

[0002]

2. Description of the Related Art As a conventional suspension subframe structure, for example, there is one shown in FIG.

[0003] To explain this, the stabilizer 30 is supported midway between the suspension subframe 20 and the bracket 10 via a bush 40. Both ends of the stabilizer 30 are connected to the left and right suspension arms, so that the left and right suspension arms are prevented from moving in opposite phases, and the inclination of the vehicle in the roll direction is suppressed.

The suspension sub-frame 20 has a recess 21 for disposing the stabilizer 30 therein. The concave groove 21 extends above the side member portion 22 of the suspension subframe 20 in the lateral direction of the vehicle body, and allows the stabilizer 30 to pass therethrough.

[0005]

However, in such a conventional suspension sub-frame structure, the formation of the concave groove 21 causes a reduction in the rigidity of the suspension sub-frame 20.

The bracket 10 serves as a reinforcing member against bending stress centered on the concave groove 21 of the suspension subframe 20. However, since the bracket 10 is provided close to the concave groove 21, the amount of deformation of the bracket 10 is increased. And the bending rigidity of the suspension subframe 20 cannot be sufficiently increased.

[0007] The present invention has been made in view of the above problems, and has as its object to provide a suspension subframe structure capable of effectively increasing the rigidity of the suspension subframe via a bracket.

[0008]

According to a first aspect of the present invention, there is provided a suspension subframe structure having a concave groove for supporting a suspension arm with respect to a vehicle body and providing a stabilizer.
A suspension subframe including a stabilizer for suppressing movement of each suspension arm in opposite phases, a bush interposed between the stabilizer and the groove, and a bracket for attaching the stabilizer to the groove of the suspension subframe via the bush. In the structure, a fastening portion to be fastened to the suspension subframe across the concave groove is provided at both ends of the bracket, and a joining portion to be joined to the bush is provided between each fastening portion of the bracket, and the joining portion is attached to each fastening portion. On the other hand, it is offset in the direction of the bottom of the concave groove.

According to a second aspect of the present invention, there is provided a suspension subframe structure according to the first aspect of the present invention, wherein the suspension subframe is provided with a seat to be joined to each fastening portion of the bracket, and each of the seats is formed at the bottom of a concave groove. And formed so as to bulge substantially upward of the vehicle away from the vehicle.

The suspension subframe structure according to claim 3 is the invention according to claim 1 or 2,
The bracket is provided with a holding plate portion having each fastening portion and a joint portion, and the bracket is provided with a reinforcing plate portion bent from around the holding plate portion, and the reinforcing plate portion has a groove inner reinforcement fitted inside the groove. Part was formed.

According to a fourth aspect of the present invention, in the suspension subframe structure according to any one of the first to third aspects, the bracket includes a holding plate portion having a fastening portion and a joining portion. A reinforcing plate portion that bends from around the holding plate portion is formed on the bracket, and a concave groove outer reinforcing portion that connects each fastening portion is formed on the reinforcing plate portion.

[0012]

In the suspension subframe structure according to the first aspect, the stabilizer is supported between the concave groove of the suspension subframe and the bracket via a bush.

The bracket is connected to the suspension sub-frame across the groove, and serves as a reinforcing member against bending stress around the groove.

The present invention provides a structure in which the joint of the bracket is offset with respect to each fastening part in the direction of the bottom of the concave groove.
The bracket is attached to the suspension subframe substantially apart from the bottom of the groove, and the bending rigidity of the suspension subframe can be effectively increased through the bracket.

As a result, the weight of the suspension subframe can be reduced while ensuring sufficient support rigidity for the suspension arm.

In the suspension subframe structure according to the second aspect, a seat portion for joining the fastening portions of the bracket is formed on the suspension subframe so as to bulge substantially upward in the vehicle so as to be away from the bottom of the concave groove. Because
The bracket is attached to the suspension subframe substantially apart from the bottom of the groove, and the bending rigidity of the suspension subframe can be effectively increased through the bracket.

In the suspension subframe structure according to the third aspect, the reinforcing portion inside the concave groove of the bracket is bent from the holding plate portion to form a beam having a U-shaped cross section. This beam is sandwiched inside the groove, and resists bending stress centered on the groove of the suspension subframe, and effectively increases the bending rigidity of the suspension subframe via the bracket.

[0018] In the suspension subframe structure according to the fourth aspect, the reinforcing portion outside the concave groove of the bracket is bent from the holding plate portion to form a beam having a U-shaped cross section. This beam is located outside the groove and sandwiched between the joints, counters the bending stress centered on the groove of the suspension subframe, and effectively increases the bending rigidity of the suspension subframe via the bracket. Can be

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 3, reference numeral 20 denotes a suspension subframe. The suspension subframe 20
It serves to support the left and right suspension arms with respect to the vehicle body. Each suspension arm (not shown) functions to support the left and right front wheels so as to be displaceable with respect to the suspension subframe 20.

The suspension subframe 20 includes a cross member 21 extending in the lateral direction of the vehicle body, side members 22 extending in the front-rear direction of the vehicle from both ends of the cross member 21, and protruding upward from the front end of the side member 22. It has a tower section 23 and the like. The suspension subframe 20 is connected to the vehicle body via an insulator mounting portion 24 provided at a rear end of the side member 22 and an insulator mounting portion 25 provided at an upper end of the tower portion 23.
At the front end of the side member 22, a mounting seat to which a suspension arm is swingably connected is provided.

Reference numeral 30 denotes a stabilizer which functions to increase the roll rigidity when the left and right wheels move in opposite phases during cornering of the vehicle or the like. Both ends of the stabilizer 30 are bent in an L-shape and connected to the left and right suspension arms. When the left and right front wheels try to move in opposite phases during cornering of the vehicle, the stabilizer 30 is twisted to prevent the left and right wheels from moving in opposite phases due to its elastic restoring force. Thereby, the inclination of the vehicle in the roll direction is suppressed.

The stabilizer 30 is locked to the suspension subframe 20 via the bracket 10 in the middle.

A recess 21 is formed in the suspension subframe 20 for passing the stabilizer 30. Groove 21
Extends above the side member portion 22 of the suspension sub-frame 20 in the lateral direction of the vehicle body, and
0 is inserted.

As shown in FIG. 2, the cross member portion 21 and the side member portion 22 of the suspension sub-frame 20 are formed by aligning the openings of upper and lower box-shaped frames 27, 28. , 28 are secured together by welding.

Each of the frames 27 and 28 is formed by press working. The concave groove 21 is also formed in the upper frame 27 constituting the side member portion 22 by press working.

As shown in FIG. 1, the bracket 10
It is arranged so as to straddle the concave groove 21, and both ends thereof are fastened to the upper frame 27 via a pair of bolts 9. A pair of nuts 8 are attached to the lower surface of the upper frame 27.
Each bolt 9 passes through the bracket 10 and the upper frame 27 and is screwed to each nut 8.

A bush 40 through which the stabilizer 30 penetrates is provided. The bush 40 is housed in the concave groove 21 and is pressed via the bracket 10. Bush 40
Is formed of an elastic material such as rubber, and elastically supports the stabilizer 30 with respect to the suspension subframe 20. The bush 40 is formed in a cylindrical shape through which the stabilizer 30 penetrates, and has a peripheral surface 41 joined to the wall surface 21 a of the concave groove 21 and an upper surface 42 joined to the bracket 10.

The bracket 10 has a holding plate portion 14 that faces the suspension subframe 20 and the bush 40 across the groove 21 and a reinforcing plate portion 15 that is bent from around the holding plate portion 14.

The holding plate portion 14 includes a pair of fastening portions 11 fastened to the upper frame 27 via the bolts 9, and each of the fastening portions 1.
1 to join to the upper surface 42 of the bush 40
2

Incidentally, the suspension subframe 2
No. 0 has a problem that it is difficult to secure its rigidity because of the structure in which the concave groove 21 is formed.

To cope with this, the present invention offsets each fastening portion 11 upward with respect to the joint portion 12 away from the bottom of the concave groove 21. The cross section of the holding plate portion 14 is
It is formed in a plate shape bent in a crank shape from 1 to the joint portion 12.

In the upper frame 27 of the suspension sub-frame 20, a seat portion 29 for joining each fastening portion 11 of the bracket 10 is formed so as to protrude upward away from the bottom of the concave groove 21. That is, since the seat portion 29 is formed to bulge in the direction opposite to the direction in which the concave groove 21 is depressed, the line segment A connecting the lower surfaces of the fastening portions 11 of the bracket 10 is formed on the side view of FIG. The upper surface 42 of the bush 40 can be offset upward away from the bottom of the concave groove 21.

The reinforcing plate 15 rises in a flange shape from around the holding plate 14. Thereby, the bracket 10
Has a U-shaped cross-section beam structure.

The reinforcing plate portion 15 has a concave groove inside reinforcing portion 16 sandwiched inside the concave groove 21. This concave groove inner reinforcing portion 16
Indicates a lower portion of the reinforcing plate portion 15 closer to the concave groove 21 than the line segment A connecting the fastening portions 11.

The reinforcing plate portion 15 has a concave groove outer reinforcing portion 17 connecting the fastening portions 11. The concave groove outside reinforcing portion 17 indicates a portion of the reinforcing plate portion 15 that is above the line segment A connecting the fastening portions 11 and is separated from the bottom of the concave groove 21.

The operation will be described next.

The bracket 10 functions as a reinforcing member against bending stress centered on the concave groove 21 of the suspension subframe 20.
The bending rigidity around the concave groove 21 of the suspension subframe 20 increases as the distance from the bottom of the suspension subframe 20 increases.

The present invention provides a structure in which each of the fastening portions 11 is offset upward from the bottom of the concave groove 21 with respect to the joint portion 12 so that the bracket 10 is substantially separated from the bottom of the concave groove 21. 20, the bending rigidity of the suspension subframe 20 can be effectively increased through the bracket 10.

The reinforcing portion 16 inside the concave groove of the bracket 10
The beam is bent from the holding plate portion 14 to have a U-shaped cross section. This beam fits inside the groove 21 and resists bending stress around the groove 21 of the suspension subframe 20.

The concave groove outside reinforcing portion 17 of the bracket 10 also
The beam is bent from the holding plate portion 14 to have a U-shaped cross section. This beam is located outside the groove 21 and each bolt 9
To oppose bending stress centered on the concave groove 21 of the suspension subframe 20.

Thus, the suspension subframe 20
By effectively increasing the bending rigidity through the bracket 10, the weight can be reduced while sufficiently supporting the suspension arm.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a perspective view of the same.

FIG. 4 is a perspective view showing a conventional example.

[Explanation of symbols]

 Reference Signs List 9 bolt 10 bracket 11 fastening part 12 joining part 14 holding plate part 15 reinforcing plate part 16 concave groove inner reinforcing part 17 concave groove outer reinforcing part 20 suspension subframe 21 concave groove 29 seat part 30 stabilizer 40 bush

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroshi Nagaoka 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd.

Claims (4)

[Claims] 1. A suspension sub-frame having a concave groove for supporting a suspension arm with respect to a vehicle body and arranging a stabilizer, a stabilizer for suppressing movement of each suspension arm in opposite phases, A suspension subframe structure comprising: a bush interposed therebetween; and a bracket for attaching a stabilizer to the concave groove of the suspension subframe via the bush, wherein the bracket is fastened to the suspension subframe across the concave groove at both ends of the bracket. A suspension sub-joint, wherein a joint to be joined to the bush is provided between each joint of the bracket, and the joint is offset toward the bottom of the concave groove with respect to each joint. Frame structure. 2. The vehicle according to claim 1, wherein said suspension sub-frame is provided with a seat portion for joining to each fastening portion of the bracket, and each seat portion is formed so as to bulge substantially upward in the vehicle so as to be away from the bottom of the concave groove. The suspension sub-frame structure according to claim 1. 3. The bracket is provided with a holding plate portion having each fastening portion and a joint portion, and the bracket is provided with a reinforcing plate portion bent from around the holding plate portion, and fitted into the reinforcing plate portion inside the concave groove. The suspension sub-frame structure according to claim 1 or 2, wherein a concave groove inner reinforcing portion is formed. 4. A bracket provided with a holding plate portion having a fastening portion and a joining portion on the bracket, a reinforcing plate portion bent from around the holding plate portion on the bracket, and a concave groove connecting the fastening portions to the reinforcing plate portion. The suspension subframe structure according to any one of claims 1 to 3, wherein an outer reinforcing portion is formed.