JPH0976718A - Rear suspension fitting part construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase supporting rigidity of the connecting part of the front end part of a trailing arm so as to improve stable controllability by embossing a bead part in the vertical direction on a protector facing to the outside, and combining a stay extending over the bead part and the bottom part of a side sill adjacent to the outside of a rear side member. SOLUTION: The load of a vehicle body is applied to a protector 21 in the vertical direction, but the section modulus of the protector 21 is enlarged so as to enlarge resistance against the load in the vertical direction, by embossing a bead part 22 in the vertical direction on the nearly center part of the protector 21 so as to form into an almost hat shaped section. In addition, because a box-shaped stay 23 is combined extending over the bead part 22 and the bottom part of a sill inner 4a, a load at lifting up can be dispersedly borne on a side sill 4 to be a strength skelton member of a vehicle body. Hereby, buckling deformation of not only the protector 21 but the external wall 8b of a bracket 8 joined with the protector 21 can be surely prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear suspension mounting structure.

[0002]

2. Description of the Related Art FIGS. 4 to 6 show a structure of a conventional rear suspension mounting portion, 1 is a rear floor panel, 2 is a cross member joined to the lower surface of the rear floor panel 1 in the vehicle width direction, and both side ends thereof. Is the rear side members 3, 3 joined to the lower surface of both sides of the rear floor panel 1 in the vehicle longitudinal direction.
It is joined on top.

Each of the cross member 2 and the rear side members 3 and 3 is formed in an inverted hat shape in cross section and forms a closed cross section with the rear floor panel 1 to form a floor skeleton portion.

A pair of inverted triangular brackets 5 and 5 are arranged on the front and rear side surfaces of the cross member 2 so as to be joined to each other over substantially the entire width. The rear suspension extends across the tops 5a and 5a of the brackets 5 and 5. 10 lateral links 12
Has one end supported by a vibration-proof bush (not shown).

The other end of the lateral link 12 is axially supported by a torsion beam 11 having an inverted U-shaped cross section through a vibration-proof bush 13.

The front ends of the trailing arms 14 and 14 in which the rear ends are joined to both ends of the torsion beam 11 are as follows:
The rear side members 3 and 3 are pivotally supported via a vibration-proof bush 15 on a bracket 8 joined to the front portion joined to the side sill 9 by changing its shape into an L-shaped cross section.

The bracket 8 is formed in a generally U-shape in plan view by the inner and outer walls 8a and 8b and their connecting portions 8c. The inner wall 8a is joined to the side wall 3a of the rear side member 3 and the outer wall 8b and the connecting portion 8c are connected to each other. The upper edge flange 8d of the installation portion 8c is joined to the bottom wall 3b of the rear side member 3 (see FIG. 2), and the front end portions of the trailing arms 14 and 14 are attached to the inner and outer walls 8a and 8b as described above. Anti-vibration bush 15
Is pivoted through.

The upper ends of the shock absorbers 16, 16 whose lower ends are axially supported outside the joints of the trailing arms 14, 14 of the torsion beam 11 have rear wheel houses 6, 6 and rear side members 3, 3, respectively.
The rear strut towers 7, 7 joined together are supported by bolts and nuts (not shown).

At the time of maintenance and inspection of parts under the floor, the sill inner 4a and the sill outer 4b form a closed cross section,
A lifter attachment 20 (lifter is not shown) is applied to the bottom of the side sill 4, which is a strength skeleton member in the vehicle front-rear direction adjacent to the outside of the rear side member 3, to lift up the vehicle body. The jack-up point) is a front portion of the rear wheels 18, 18 pivotally supported by the stabilizers 17, 17 at both end portions of the torsion beam 11, and may be set in the vicinity of the pivotal support portions at the front end portions of the trailing arms 14, 14. Many.

However, when the vehicle body is lifted up with the attachment 20 displaced from the jack-up point of the side sill 4 to the floor center side, the trailing arms 14 and 14 are arranged in the front-rear direction below the front end portions thereof. The wire / tubular parts 19 such as the parking brake cable and the fuel tube may be damaged.

Therefore, as shown in FIG. 6, the outer wall 8b of the bracket 8 is joined with a protector 21 which is disposed laterally of the wire / tubular component 19 and extends downward from the wire / tubular component 19. Even when the vehicle body is lifted up with the attachment 20 displaced to the center side of the floor, the protector 21 receives the attachment 20 to protect the wire / tubular component 19.

This similar structure is shown, for example, on pages C-43 to C-48 of an introduction of a new model car N15 type car published by Nissan Motor Co., Ltd. in January 1995.

[0013]

The protector 21 has a reinforcing flange 21a formed by bending from the front edge to the lower edge of the protector 21. However, since the protector 21 is formed of a single flat steel plate material, the attachment is made by the protector 21. When the vehicle body is lifted up by receiving 20, the plate thickness of the protector 21 needs to be large in order to secure sufficient surface rigidity to withstand the vehicle body load, and the plate thickness of the bracket 8 and the outer wall 8b is large. Difference becomes large and the bondability deteriorates.

Further, due to the difference in plate thickness between the protector 21 and the outer wall 8b, the outer wall 8b side may be buckled and deformed during the lift-up.

Therefore, the present invention can prevent deformation of the protector and the support bracket of the trailing arm even when the vehicle body is lifted up through the protector, and of course, the support rigidity of the connecting portion of the front end of the trailing arm. It is intended to provide a rear suspension mounting portion structure capable of improving the maneuverability by increasing the height.

[0016]

According to a first aspect of the present invention, a front end of a trailing arm joined to both ends of a torsion beam is pivotally supported between an inner wall and an outer wall of a bracket joined to a rear side member. In a structure in which a protector that is arranged laterally of a wire / tubular component arranged in the front-rear direction on the lower side of the front end of the trailing arm on the outer wall of the bracket is joined to a protector extending below the line / tubular component,
The protector is embossed with a vertical bead portion facing outward, and a stay is connected across the bead portion and the bottom of the side sill adjacent to the outer side of the rear side member.

According to the structure of claim 1, the protector has a large cross-section coefficient due to the formation of the bead portion in the vertical direction, and the resistance against the load acting in the vertical direction when the vehicle body is lifted up through the protector. Since the stay is connected over the bead and the side sill, the load at the time of lift-up can be distributed to the side sill side through the stay, so the buckling deformation of the protector and bracket outer wall can be ensured. Can be prevented.

On the other hand, since the resistance of the protector can be increased, the thickness of the protector can be reduced and the bondability with the outer wall of the bracket can be improved, so that the bonding work can be facilitated and the bonding strength can be appropriately adjusted. Can be increased.

Further, since the bead portion is embossed toward the outside, it does not interfere with the wire / tubular parts.
It is possible to avoid generation of interference noise due to vibration during traveling.

Further, since the suspension input acting on the bracket via the trailing arm can be distributed to the side sill side via the stay, the supporting rigidity of the connecting portion at the front end of the trailing arm can be increased. Therefore, the maneuverability can be improved.

According to a second aspect of the present invention, the bead portion of the outer wall of the bracket according to the first aspect is formed into an open cross-sectional area having a size capable of ensuring a non-interference clearance between the stay fastening portion and the wire / tubular component. It is characterized by that.

According to the second aspect of the present invention, since the open cross-sectional area of the bead portion is made sufficiently large, the non-interference clearance between the stay fastening member and the wire / tubular component can be secured,
It is possible to avoid the occurrence of interference noise between the stay fastening member and the wire / tubular component due to vibration during traveling.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

1 to 5, the rear suspension 1
Reference numeral 0 indicates that the shock absorbers 16, 16 axially supported on both side ends of the torsion beam 11 are bolt-nut coupled to the rear strut towers 7, 7, and the other end of the lateral link 12 having one end connected to the torsion beam 11 is cross member 2. Top 5 of brackets 5, 5 joined to
inner and outer walls 8a and 8b of the bracket 8 in which the front end portions of the trailing arms 14 and 14 which are pivotally supported between a and 5a and which are joined to both end portions of the torsion beam 11 are joined to the rear side members 3 and 3, respectively. The trailing arms 14, 1 are attached to the outer wall 8b of the bracket 8 which is pivotally supported between them.
Wires / tubular parts 1 such as a parking brake cable and a fuel tube arranged in the front-rear direction below the front end of 4
The basic configuration is similar to the above-mentioned conventional one, such as a protector 21 which is disposed on the side of 9 and extends below the wire / tubular component 19 in a joined manner.

The protector 21 is embossed with a longitudinal bead portion 22 facing outward, and the sill inner 4a of the side sill 4 adjacent to the outer side of the bead portion 21 and the rear suspensions 3,3. The stay 23 is connected by a bolt 24 and a nut 25 across the bottom of the.

In this embodiment, a single bead portion 22 is provided at a substantially central portion of the protector 21, and a non-interference clearance is provided between the bolt 24 and the nut 25 which are stay fastening members and the wire / tubular component 19. It is formed to have an open cross-sectional area of a size that can secure S, has a substantially hat-shaped cross-sectional shape, and is formed by bending the reinforcing flange 21a inward from the front edge to the bottom edge and the rear edge of the protector 21. is there.

On the other hand, the stay 23 is formed in a box shape having a lower opening which is obliquely connected to the bead portion 22 and the bottom of the sill inner 9a.

The nuts 25, 25 are arranged so as to be joined to the inner surfaces of the bead 22 and the bottom of the sill inner 4a, and the bolts 2 are attached from the inside of the mounting seats 23a, 23b of the stay 23.
4, 24 are inserted, and these nuts 25, 25 are screwed and fastened.

According to the structure of the above embodiment, when the vehicle body is lifted up, the attachment 20 of the lifter (not shown) is originally set near the bracket 8 which pivotally supports the front end of the trailing arm 14. This is done by applying it to the jack-up point on the bottom of the side sill 4, but accidentally attach this attachment 20 to the side sill 4
When it is arranged at a position deviated to the center side of the floor from the above and lifted up, the attachment 20 can be received by the protector 21 and the wire / tubular component 19 can be protected by this protector 21.

At this time, the load of the vehicle body acts on the protector 21 in the vertical direction, but a bead portion 22 in the vertical direction is embossed at a substantially central portion of the protector 21 to form a substantially hat-shaped cross section. Since the cross-sectional modulus of the protector 21 is increased to increase the resistance to the vertical load, and the box-shaped stay 23 is connected to the bead portion 22 and the bottom portion of the sill inner 4a, the lift-up time is increased. The load of the protector 2 can be distributed to the side sill 4, which is the strength frame member of the vehicle body.
In addition to 1, it is possible to reliably prevent buckling deformation of the outer wall 8b of the bracket 8 to which the protector 21 is joined.

As described above, since the resisting force of the protector 21 against the vertical load can be increased and its buckling deformation can be prevented, the protector 21 can be thinned to have the same plate thickness as the outer wall 8b of the bracket 8. Therefore, the bondability between the protector 21 and the outer wall 8b of the bracket 8 is improved, the bonding work can be easily performed, and the bonding strength can be increased by appropriately performing the bonding.

Since the bead portion 22 is embossed outwardly, the bead portion 22 and the wire / tubular component 19 are formed.
Therefore, it is possible to avoid generation of interference noise due to vibration during traveling.

In particular, in the present embodiment, the stay 23 is fastened and fixed to the bead portion 22 with the bolt 24 and the nut 25. However, the bead portion 22 is formed to have a sufficiently large open cross-sectional area so that the bolt 24 and the nut 25 are joined together. Since the non-interference clearance S with the wire / tubular part 19 is secured, these bolts 24, nuts 25 and the wire / tubular part 1 due to vibration during traveling
It is possible to avoid the occurrence of interference noise with 9.

Further, the suspension input acting on the bracket 8 via the trailing arm 14 is connected to the stay 2
Since the load can be distributed to the side sill 4 side through 3, the supporting rigidity of the connecting portion between the front end of the trailing arm 14 and the bracket 8 can be increased, and the maneuverability can be further improved.

In the above-described embodiment, the single bead portion 22 having a relatively large open cross-sectional area is provided substantially in the center of the protector 21. However, the bead portion 22 has a small open cross-sectional area and a plurality of lines thereof. It may be arranged in a row in the vertical direction.

The stay 23 may be joined to the bead portion 22 of the protector 21 in advance.

[0037]

As described above, according to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, the protector has a large cross-section coefficient due to the formation of the bead portion in the vertical direction and a large drag force against the load in the vertical direction. Moreover, the protector is provided by the stay connected across the bead portion and the side sill. The vertical load acting on the side sill can be distributed to the side sill side via the stay, so even if the body of the vehicle is accidentally lifted up by the protector, this protector as well as the seat of the outer wall of the bracket to which the protector is joined are accidentally lifted. Flexural deformation can be reliably prevented, and the quality and reliability can be enhanced.

Further, since the resistance to the vertical load of the protector can be increased in this manner, the thickness of the protector can be reduced, and therefore the bondability between the protector and the outer wall of the bracket is improved and the bonding work is facilitated. In addition to the above, it is possible to appropriately perform the joining and increase the joining strength.

In addition, since the bead portion is embossed outward, there is no interference between the bead portion and the wire / tubular parts, and the occurrence of interference noise due to vibration during traveling is avoided to improve the quality. be able to.

Further, since the suspension input acting on the bracket via the trailing arm can be distributed to the side sills via the stay, the supporting rigidity of the connecting portion at the front end of the trailing arm can be increased to improve the steering stability. It is possible to further improve the sex.

According to the second aspect, since the open cross-sectional area of the bead portion is made sufficiently large, a non-interference clearance between the stay fastening member and the wire / tubular component can be secured, and these stay fastening due to vibration during traveling is ensured. It is possible to avoid the occurrence of interference noise between the member and the wire / tubular component.

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view of a main part of the same embodiment.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a perspective view of a rear suspension.

FIG. 5 is a perspective view of a rear floor on which a rear suspension is mounted.

FIG. 6 is a cross-sectional view showing a conventional structure.

[Explanation of symbols]

 1 Rear Floor Panel 3 Rear Side Member 8 Bracket 8a Bracket Inner Wall 8b Bracket Outer Wall 10 Rear Suspension 11 Torsion Beam 14 Trailing Arm 19 Wire / Tubular Parts 21 Protector 22 Bead Part 23 Stay 24, 25 Stay Fastening Member

Claims (2)

[Claims] 1. A front end of a trailing arm joined to both end portions of a torsion beam is pivotally supported between an inner wall and an outer wall of a bracket joined to a rear side member, and a lower side of the front end of the trailing arm is attached to an outer wall of the bracket. Is placed on the side of the wire / tubular part that is routed in the front-back direction,
In a structure in which a protector extending below the wire / tubular component is joined, a longitudinal bead portion is embossed on the protector toward the outside, and a side sill adjacent to the outside of the bead portion and the rear side member. Rear suspension mounting structure, characterized in that the stay is connected to the bottom of the rear suspension. 2. The rear suspension according to claim 1, wherein the bead portion of the outer wall of the bracket is formed to have an open cross-sectional area large enough to secure a non-interference clearance between the stay fastening portion and the wire / tubular component. Mounting structure.