JPH1159152A - Rear suspension structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost by reducing the number of parts and improve the degree of freedom of layout of a link or a shock absorber constituting a suspension. SOLUTION: In a rear suspension structure provided with suspension members 1 mounted on car body frames 4 in both the side parts of a car width direction and coil springs 16 which are arranged in each of both the side parts of the car width direction and are mounted on the car body frames 4, a mounting part 2 on the car body frames 4 of the suspension members 1 and a mounting part on the car body frames 4 of the coil spring 16 are substantially coaxially arranged in a car height direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear member having a suspension member attached to a vehicle body frame on both sides in the vehicle width direction, and a coil spring disposed on both sides in the vehicle width direction and attached to the vehicle body frame. Related to suspension structure.

[0002]

2. Description of the Related Art As a conventional rear suspension structure of this type, both sides in the vehicle width direction of a suspension member are respectively attached to a body frame via insulators and the like, and coil springs are arranged on both sides in the vehicle width direction. It is known that the coil spring is mounted at a position different from the mounting position of the suspension member on the body frame via an insulator or the like.

[0003]

However, in the above-mentioned conventional rear suspension structure, since the suspension member and the coil spring are respectively mounted at different positions on the body frame, not only the number of parts such as insulators but also the number of parts becomes large. However, there is an inconvenience that layout restrictions such as a link and a shock absorber constituting the above are increased.

SUMMARY OF THE INVENTION The present invention has been made to solve such inconvenience, and it is possible to reduce the number of parts to reduce the cost, and to improve the flexibility of layout of links and shock absorbers constituting a suspension. It is an object to provide a rear suspension structure that can be achieved.

[0005]

In order to achieve the above object, a rear suspension structure according to claim 1 has a suspension member attached to a vehicle body frame at both sides in a vehicle width direction, and a suspension member attached to both sides in a vehicle width direction. In a rear suspension structure including a coil spring disposed and mounted on a vehicle body frame, a mounting portion of the suspension member to the vehicle body frame and a mounting portion of the coil spring to the vehicle body frame are substantially aligned in a vehicle height direction. It is characterized by being arranged coaxially.

According to a second aspect of the present invention, there is provided a rear suspension structure according to the first aspect, wherein an upper seat is disposed below a mounting portion of the suspension member, and the upper seat is mounted on the vehicle body frame. A cylinder portion is disposed between the cylinder portion and both ends of the cylinder portion are fixed to the vehicle body frame and the upper seat, respectively. A mounting portion of the suspension member is attached to the cylinder portion via an insulator, and the upper seat The end of the coil spring is brought into contact with the lower surface of the coil spring.

According to a third aspect of the present invention, in the second aspect, the substantially central portion of the upper seat is partially bulged toward the vehicle body frame, and the bulged portion is used as the cylindrical portion. It is characterized by.

[0008]

According to the first aspect of the present invention, the mounting portion of the suspension member to the vehicle body frame and the mounting portion of the coil spring to the vehicle body frame are arranged substantially coaxially in the vehicle height direction. When the coil spring is mounted on the vehicle body frame, the insulator and the like can be shared, and as a result, the number of parts can be reduced, and the cost can be reduced.

Further, since the mounting portion of the suspension member to the vehicle body frame and the mounting portion of the coil spring to the vehicle body frame are disposed substantially coaxially in the vehicle height direction, the links and shock absorbers constituting the suspension are provided. The advantage is that the degree of freedom in layout can be improved.

[0010] In the invention of claim 2, in addition to claim 1,
By receiving the spring reaction force of the coil spring in the upper seat and the cylindrical portion, the structure can be made such that the reaction force does not act on the insulator, so that the constraint on the durability of the insulator can be reduced, and as a result,
The effect that the insulator can be made low in rigidity and road noise can be reduced can be obtained.

According to the third aspect of the present invention, in addition to the second aspect,
Costs can be reduced by eliminating the need for a separate cylinder,
Moreover, the suspension member mounting portion is attached to the bulging portion via the insulator, and the upper seat is mounted on the vehicle body frame in this state, whereby the suspension member mounting portion is positioned. The effect that simplification can be achieved is obtained.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a main part for explaining a rear suspension structure as an example of an embodiment of the present invention. FIG. 2 is an overall perspective view of the rear suspension structure.
FIG. 4 is a partially enlarged perspective view of FIG. 2, and FIG. 4 is a cross-sectional view of a main part for describing a rear suspension structure according to another embodiment of the present invention.

1 to 3, reference numeral 1 denotes a suspension member that is long in the vehicle width direction, and two (four in total) mounting portions 2 are provided on both sides of the suspension member 1 in the vehicle width direction. Are spaced apart from each other in the front-rear direction. An insulator 3 is fitted into the mounting portion 2 of the suspension member 1 by press fitting or the like, and two mounting portions 2 provided on the rear side in the front-rear direction of the vehicle include bolts and nuts (both not shown). Is attached to the body frame 4.

On the other hand, the insulators 3 of the two mounting portions 2 provided on the front side of the suspension member 1 in the front-rear direction of the vehicle are externally fitted to a collar (tube portion) 5. It is arranged between the mounting portion 2 and an upper sheet 6 provided below the mounting portion 2.

The upper seat 6 includes a seat portion 7 disposed below the mounting portion 2 and a front portion of the vehicle from the seat portion.
Mounting arms 8a, 8b, 8c extending obliquely upward toward the rear and inward in the vehicle width direction, respectively. The distal ends of the mounting arms 8a, 8b, 8c are provided with bolts 9 and nuts 10 respectively. And is fixed to the body frame 4 via the Also,
Bolt insertion holes 11 and 12 are formed in the body frame 4 and the seat portion 7 located on the axis of the collar 5, respectively. The bolt 13 is inserted from the bolt insertion hole 11 on the body frame 4 side, and the bolt 13 is inserted into the collar 5 and the seat portion 7.
The upper and lower ends of the collar 5 are respectively inserted into the body frame 4 and the upper seat 6 by screwing the nuts 14 into the protruding ends of the bolts 13 protruding from the bolt insertion holes 12. It is fixed to the seat 7.

A circumferential groove 15 is formed substantially concentrically with the bolt insertion hole 12 around the bolt insertion hole 12 on the lower surface of the seat portion 7 of the upper sheet 6. The upper end is inserted and supported. The lower end of the coil spring 16 is inserted and supported in an insertion hole 17 a provided on the upper surface of the lower arm 17, whereby
The coil spring 16 is attached to the vehicle body frame 4 via the upper seat 6, the collar 5, and the insulator 3, and the mounting part 2 of the suspension member 1 to the vehicle body frame 4 and the mounting part of the coil spring 16 to the vehicle body frame 4 are formed. It is arranged substantially coaxially in the vehicle height direction.

As is apparent from the above description, in the rear suspension structure of this embodiment, the mounting portion 2 of the suspension member 1 to the vehicle body frame 4 and the mounting portion of the coil spring 16 to the vehicle body frame 4 are different from each other. Since the suspension member 1 and the coil spring 16 are mounted on the vehicle body frame 4 because they are arranged substantially coaxially in the high direction, the insulator 3, the collar 5, and the bolt 13 can be shared, and as a result, the number of parts is reduced. The cost can be reduced and cost can be reduced.

Further, since the mounting portion 2 of the suspension member 1 to the vehicle body frame 4 and the mounting portion of the coil spring 16 to the vehicle body frame 4 are disposed substantially coaxially in the vehicle height direction, the link constituting the suspension is provided. The degree of freedom of the layout of the shock absorber and the shock absorber can be improved.

Furthermore, since the upper seat 6 and the collar 5 receive the spring reaction force of the coil spring 16 so that the reaction force does not act on the insulator 3, the restriction on the durability of the insulator 3 is reduced. As a result, it is possible to reduce the rigidity of the insulator 3 and reduce road noise.

Further, since the supporting portion at the upper end of the coil spring 16 also serves as a kind of pin gusset for the bolt 13, the supporting rigidity of the bolt 13 can be increased. In the above-described embodiment, the case where the insulator 3 of the suspension member attaching portion 2 is attached to the collar 5 is taken as an example. However, this is not always necessary. For example, as shown in FIG. 20, a substantially central portion of the seat portion 21 is bulged toward the body frame 4, the insulator 3 of the suspension member mounting portion 2 is fitted over the bulged portion 22, and the upper end surface of the bulged portion 22 is May be fixed via a bolt 23 and a nut 24.

In this way, the collar 5 can be dispensed with, the bolt 23 can be shortened, and the cost can be further reduced.
2 is an insulator 3 of the suspension member mounting portion 2
The suspension member mounting portion 2 can be positioned simply by externally fitting the upper seat 20 to the vehicle body frame 4, so that the operation of mounting the suspension member mounting portion 2 can be facilitated. Other configurations, functions and effects are the same as those of the above-described embodiment.

[Brief description of the drawings]

FIG. 1 is a fragmentary cross-sectional view for explaining a rear suspension structure that is an example of an embodiment of the present invention.

FIG. 2 is an overall perspective view of a rear suspension structure.

FIG. 3 is a partially enlarged perspective view of FIG. 2;

FIG. 4 is a cross-sectional view of a main portion for describing a rear suspension structure according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Suspension member 2 ... Suspension member attaching part 3 ... Insulator 4 ... Body frame 5 ... Collar (tubular part) 6, 20 ... Upper seat 7, 21 ... Seat part 16 ... Coil spring 22 ... Swelling part (cylindrical part)

Claims (3)

[Claims] 1. A rear suspension structure comprising: a suspension member attached to a vehicle body frame on both sides in a vehicle width direction; and coil springs respectively mounted on the vehicle body frame on both sides in a vehicle width direction. A rear suspension structure, wherein a mounting portion of the member to the vehicle body frame and a mounting portion of the coil spring to the vehicle body frame are disposed substantially coaxially in a vehicle height direction. 2. An upper seat is provided below a mounting portion of the suspension member, and the upper seat is mounted on the vehicle body frame. A tubular portion is disposed between the vehicle body frame and the upper seat, and Both ends are fixed to the vehicle body frame and the upper seat, respectively, and a mounting portion of the suspension member is mounted on the cylindrical portion via an insulator, and an end of the coil spring is brought into contact with a lower surface of the upper seat. The rear suspension structure according to claim 1, wherein: 3. The rear suspension structure according to claim 2, wherein a substantially central portion of the upper seat is partially bulged toward the vehicle body frame, and the bulged portion is the cylindrical portion.