JP4753071B2 - Vehicle rear suspension mounting structure - Google Patents

Description

  The present invention relates to a vehicle rear suspension mounting structure, and more particularly to a suspension bracket that pivotally supports a trailing arm and a mounting structure of the bracket.

The rear suspension bracket is a part that affects running performance, and high rigidity is required. Therefore, the rear suspension bracket has a triangular recess formed on the lower surface of the rear side member, and a lean force is coupled to the recess, and both ends of the lean force are coupled to both side walls for pivotally supporting the mount. (See, for example, Patent Document 1) or by attaching an overhanging portion of the rocker rail inner panel to one of the side walls for pivotally supporting the mount and attaching a protruding portion of the cross sill to the other side. The rigidity is increased (for example, Patent Document 2).
JP-A-7-164845 (see FIG. 1) JP 2000-153778 A (see FIG. 1)

  An object of the present invention is to provide a vehicle suspension mounting structure that solves the above-described problems and has improved rigidity.

In order to solve the above problems, the present invention is mounted between a first side wall disposed on the lower side of a floor side member and disposed on the center side of the vehicle and a second side wall disposed on the side of the vehicle. the rear suspension attaching structure of a vehicle equipped with a suspension bracket for supporting the, by extending the side sill toward the rear of the vehicle, said second side wall of the suspension bracket, attached to the side sill and the floor side member, the wheel house An end portion of the inner panel on the vehicle center side is extended to the rear of the vehicle, the second side wall of the suspension bracket is coupled to the extended portion, and the upper end of the first side wall is connected to the side surface of the floor side member. bound, while additionally provided a reinforcement to the first side wall, that the reinforcement attached to the lower surface of the floor side member A.
In addition, the present invention lies in that a connecting wall is formed by bending a front end portion of the lean force toward the vehicle side, and the connecting wall is coupled to the second side wall.
Further, according to the present invention, the front side end of the first side wall of the vehicle is bent to the side of the vehicle to form a front wall that covers the front of the connecting wall, and the lower end of the front wall is connected to the connecting side. In addition to being coupled to the lower end of the wall, the front wall is extended away from the connecting wall as it goes upward, and the upper end of the front wall is coupled to the lower surface of the floor side member.

The part where the side sill of the closed cross-section structure disappears is a sudden change part of rigidity, which is an important part for the torsional rigidity of the vehicle. In the case where the suspension bracket is disposed in such a part, a device for increasing the rigidity is required.
According to the present invention, even in the case of arranging the suspension bracket to the connecting portion near the rear end and the wheel house side sill, and coupling the suspension bracket on the floor side member and the side sill of the vehicle wheel house inner panel A center side end portion extending rearward of the vehicle, the second side wall of the suspension bracket being coupled to the extension portion, an upper end of the first side wall being coupled to a side surface of the floor side member, Since the lean force is attached to the first side wall and the lean force is coupled to the lower surface of the floor side member , the suspension bracket is firmly fixed to the vehicle body, and the rigidity of the bracket is improved. Since the connection between the rear end of the side sill and the wheel house is strengthened, Sex is improved, thereby, to improve the running stability of the vehicle, rigidity feeling during running of the vehicle is increased, thereby improving the marketability. Moreover, since the 2nd side wall was couple | bonded with the wheel house, the rigidity of the 2nd side wall further improves. Since the upper end of the first side wall is joined to the side surface of the floor side member, the lateral force of the vehicle input from the suspension (mainly generated during cornering) is in the peeling direction, so the coupling strength It will be disadvantageous. Furthermore, since the first side wall is coupled not only to the side surface of the floor side member but also to the lower surface of the floor side member, the rigidity of the first side wall is improved and the durability against the force received from the suspension of the bracket is improved.
According to the second aspect of the present invention, the first side wall and the second side wall are coupled to each other at the front end portion of the vehicle with a plate-like structure (a structure having a width in the vertical direction). The side wall and the second side wall are prevented from falling in the thickness direction, and the rigidity of the bracket is improved.
Further, since the first side wall and the second side wall are coupled to each other, the bracket components can be coupled and assembled in advance, and the assembly workability is improved.
According to the invention of claim 3 , since the closed wall having a triangular cross section is formed by the front wall of the first side wall, the connecting wall of the reinforcement, and the lower surface of the floor side member, the rigidity of the suspension bracket is further improved. .

A vehicle rear suspension mounting structure according to the present invention will be described below in detail with reference to the drawings.
FIG. 1 is a perspective view of a rear suspension mounting structure for a vehicle according to the present invention as viewed from the lower part of the vehicle, FIG. 2 is an enlarged perspective view of a main part in FIG. 1, and FIG. 4 is a perspective view of the suspension bracket as seen from above the front, FIG. 5 is a perspective view of the suspension bracket as seen from above the rear, FIG. 6 is a cross-sectional view taken along line AA in FIG. It is the BB sectional view taken on the line in FIG.

1 to 5, in the vehicle according to the present embodiment, a pair of left and right rear floor side members (hereinafter referred to as side members) 1 are disposed along the front-rear direction of the vehicle body on the rear lower surface of the vehicle body. A side sill 2 is provided on the lower side of the side surface corresponding to the door opening of the vehicle body along the longitudinal direction of the vehicle body.
The inner panel 2a of the side sill 2 is extended up to a portion curved above the side member 1 and toward the center of the vehicle. A suspension bracket 4 that supports the suspension arm of the rear wheel is provided along with the wheel house 3 on the rear side of the side sill 2.
The lower end of the inner panel 3 a of the wheel house 3 extends rearward, and the extended portion 3 a is joined to the inner panel 2 a of the side sill 2.

  The suspension bracket 4 includes a first side wall 10, a second side wall 20, a lean force 30, and a connecting member 40. Since the distance between the first side wall 10 and the second side wall 20 of the suspension bracket 4 is formed in accordance with the width of the suspension arm, the width of the side member 1 is the first side wall of the suspension bracket 4. 10 and a width larger than the distance between the second side wall 20.

  The first side wall 10 extends in the front-rear direction of the vehicle, and has a mount mounting wall 12 having a bolt insertion hole 11 through which the mount mounting bolt 5 is inserted, and a vehicle center direction and upward from the upper edge of the mount mounting wall 12. A bulging wall 13 that extends from the upper edge of the bulging wall 13, a flange 14 that extends upward from the upper edge of the bulging wall 13 and is joined to the side surface 1 b of the side member 1, and a front edge of the mount mounting wall 12. A front wall 15 that is bent to the side of the vehicle and has a lower edge joined to a lower end of a front wall, which will be described later, of the lean force 30 and inclined forward and upward from the upper edge of the front wall 15 And a flange 16 that is joined to the lower surface of the floor side member 1 and a flange 17 that extends forward to the side edge of the vehicle on the front wall 15 and is joined to the inner panel 2a of the side sill 2. Been That.

  The second side wall 20 extends in the front-rear direction of the vehicle, and has a mount mounting wall 22 having a bolt insertion hole 21 through which the mount mounting bolt 5 is inserted, and bends from the upper edge of the mount mounting wall 22 toward the center of the vehicle. The ceiling wall 23 is joined to the lower surface of the floor side member 1.

  The lean force 30 is disposed from the inner surface side of the first side wall 10 to the front end of the mount mounting wall 22 of the second side wall 20, and has a mount mounting wall having a bolt insertion hole 31 through which the mount mounting bolt 5 is inserted. 32, an upper edge of the mount mounting wall 32 extending to the side of the vehicle, a ceiling wall 33 joined to the lower surface of the floor side member 1, a front edge of the mount mounting wall 32, and a front end of the ceiling wall 33 The front wall 34 is arranged vertically from the edge.

  The connecting member 40 includes a rear wall 41 that extends in the width direction of the vehicle, a ceiling wall 42 that extends rearward from the upper edge of the rear wall 41, and is joined to the lower surface of the floor side member 1. 41 is formed by flanges 43 and 44 that extend forward and are joined to the mount mounting wall 12 and the mount mounting wall 22 respectively.

The ceiling wall 33 of the lean force 30 is joined to the ceiling wall 23 of the second side wall 20 at its front end, and the vehicle side edge of the front wall 34 of the lean force 30 is the mount mounting wall of the second side wall 20. 22 joined to the leading edge.
Further, the mount mounting wall 12 of the first side wall 10 is joined to the mount mounting wall 32 of the lean force 30 so that the bolt insertion hole 11 matches the bolt insertion hole 31 of the mount mounting wall 32 of the lean force 30. The lower end edge of the front wall 15 of the first side wall 10 is joined to the lower end edge of the front wall 34 of the lean force 30.
The connecting member 40 has a flange 43 joined to the rear end edge of the mount mounting wall 12 of the first side wall 10, and a flange 44 joined to the rear end edge of the mount mounting wall 22 of the second side wall 20. The

  As shown in FIGS. 3, 6, and 7, the bracket 2 formed in this way has the ceiling wall 23 of the second side wall 20 and the ceiling wall 33 of the lean force 30 on the lower surface 1 a of the side member 1. The flange 14 of the first side wall 10 is joined to the vehicle side surface 1b of the side member 1, and the mount mounting wall 22 of the second side wall 20 is joined to the side sill inner panel 2a. The flange 17 of the side wall 10 is joined to the side sill inner panel 2a.

According to the above embodiment, the following effects can be obtained.
Even when the suspension bracket 4 is arranged in the vicinity of the connecting portion between the rear end of the side sill 2 and the wheel house 3, the suspension bracket 4 is firmly connected to the vehicle body because the suspension bracket 4 is coupled to the floor side member 1 and the side sill 2. It is fixed and the rigidity of the suspension bracket 4 is improved. In addition, the suspension bracket 4 strengthens the joint between the rear end of the side sill 2 and the wheel house 3, so that the rigidity of the vehicle is improved, thereby improving the running stability of the vehicle and the feeling of rigidity when the vehicle is running. Will increase and the merchantability will improve. Since the suspension bracket 4 is disposed at a position where it can be seen from the wheel house 3, bolts can be inserted and fastened from the side of the vehicle, and the assembly workability is improved.

Moreover, since the rear end of the inner panel 2a forming the side sill 2 is extended rearward and the second side wall 20 is coupled to the wheel house 3, the rigidity of the suspension bracket 4 is further improved. Since the mounting wall 22 of the second side wall 20 is connected to the wheel house inner panel 3a that closes the rear of the side sill 2 and forms a cross section, the rigidity of the suspension bracket 4 is improved. That is, since the mount mounting wall 22 of the second side wall 20 is connected to the corner of the rear end of the side sill 2, it is connected to the two-direction surfaces of the rear end of the side sill 2 and the end of the wheel house inner panel 3a. The rigidity of the suspension bracket 4 is improved.
The first side wall 10 is extended upward and forward, and the flanges 14 and 16 are coupled not only to the side surface of the floor side member 1 but also to the lower surface of the floor side member 1. And the durability against the force received from the suspension of the suspension bracket 4 is improved.

Since the first side wall 10 and the second side wall 20 extending downward from the floor side member 1 are coupled to each other by the lean force 30 at the front end portion of the vehicle that does not interfere with the suspension arm, the first side wall 10 and the second side wall 20 are connected to each other. The side wall 20 is prevented from falling in the thickness direction, and the rigidity of the suspension bracket 4 is improved.
Further, since the first side wall 10 and the second side wall 20 are coupled to each other, the components of the suspension bracket 4 can be coupled and assembled in advance, and the assembly workability is improved.
Further, since the front wall 15 of the first side wall 10, the connecting wall of the lean force 30, and the lower surface of the floor side member 1 form a closed cross section having a triangular cross section, the rigidity of the suspension bracket 4 is further improved.
Further, since the first side wall 10 and the lean force 30 are welded and joined around the mount bolt fastening nut and at the lower end, the front side of the first side wall 10, the lean force 30 and the floor side member 1 is The closed cross section is configured in the same manner as described above, and the rigidity of the first side wall 10 is improved. Since the Z-shaped bent portion is formed by the mount mounting wall 12, the front wall 15 and the flange 17 of the first side wall 10, the rigidity can be improved. Since the trapezoidal bent surface is formed by the flange 16 of the first side wall 10, the front wall 15, and the lower wall surface of the front wall 15, the rigidity can be improved.

Further, as shown in FIG. 2, beads 10a, 10b, 20a, etc. are provided on the walls such as the mount mounting wall 12, the front wall 15 of the first side wall 10 and the mount mounting wall 22 of the second side wall 20, respectively. If formed, the strength of the suspension bracket 4 can be further increased.

  The present invention is not limited to the above embodiment. For example, the first side wall 10, the second side wall 20, the lean force 30, and the connecting member 40 that constitute the suspension bracket 4 are: The plate thickness and size can be changed as necessary, and the width and number of beads can be arbitrarily set. In addition, it goes without saying that the present invention can be implemented with appropriate modifications within a range not changing the gist of the present invention.

It is the perspective view which looked at the rear suspension mounting structure of the vehicle concerning the present invention from the vehicle lower part. It is a principal part expansion perspective view in FIG. It is the perspective view which looked at the suspension bracket from the center side lower part of the vehicle. It is the perspective view which looked at the suspension bracket from the front upper part. It is the perspective view which looked at the suspension bracket from the rear upper part. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Floor side member 1a Lower surface 1b Center side surface of vehicle 2 Side sill 2a Inner panel
3 Wheelhouse 3a Inner panel 4 Suspension bracket 5 Mount mounting bolt 10 First side wall 11 Bolt insertion hole 12 Mount mounting wall
13 bulging wall 14 flange 15 front wall 16 flange 17 flange 20 second side wall 21 bolt insertion hole
22 Mount Mounting Wall 23 Ceiling Wall 30 Reinforce 31 Bolt Insertion Hole 32 Mount Mounting Wall 33 Ceiling Wall 34 Front Wall 40 Connecting Member 41 Rear Wall 42 Ceiling Wall 43, 44 Flange

Claims (3)

A vehicle equipped with a suspension bracket that is installed at a lower portion of a floor side member and pivotally supports a mount between a first side wall disposed on the vehicle center side and a second side wall disposed on the vehicle side side. In the rear suspension mounting structure,
A side sill is extended to the rear of the vehicle, and the second side wall of the suspension bracket is coupled to the floor side member and the side sill,
Extending the vehicle center side end of the wheel house inner panel to the rear of the vehicle, and connecting the second side wall of the suspension bracket to the extended portion,
An upper end of the first side wall is coupled to a side surface of the floor side member, a lean force is attached to the first side wall, and the lean force is coupled to a lower surface of the floor side member. The vehicle's rear suspension mounting structure. The vehicle front side end portion of the reinforcement to form the connecting wall is bent to the side of the vehicle side, the vehicle according to claim 1, characterized in that the connecting wall bonded to the second side wall rear Suspension mounting structure. The front side end of the first side wall of the vehicle is bent to the side of the vehicle to form a front wall that covers the front of the connecting wall, and the lower end of the front wall is coupled to the lower end of the connecting wall. The rear of the vehicle according to claim 2 , wherein the front wall extends away from the connection wall as it goes upward, and an upper end of the front wall is coupled to a lower surface of the floor side member. Suspension mounting structure.

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