JPH0834219A - Independent suspension type suspension - Google Patents

Abstract

PURPOSE:To reduce the whole manufacturing cost of an independent suspension type suspension by dispensing with such complicated work as casting for manufacturing a supporting body to supportingly connect each part of the suspension, and to simply and properly carry out connecting work for each part of the suspension. CONSTITUTION:A supporting body 2 is equipped with a pair of right and left side parts which are mutually opposite at fixed intervals along the direction of car width and a bottom part, and a spindle 1 is penetratedly inserted in through holes 20a, 20b provided in at least either of the side parts of the supporting body 2 and fixed, and the other end 3b of a suspension rod 3 is inserted between the side parts of the supporting body 2, and pivotally attached between a pair of these side parts. The other end 4b of a leaf spring 4 is held between the bottom of the supporting body 2 and a plate-shaped body 70 attached to the above bottom and fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an independent suspension type suspension.

[0002]

2. Description of the Related Art Conventionally, a suspension of this type is disclosed in Japanese Patent Laid-Open No. 4-252713. That is, as shown in FIG. 1 of the publication, this conventional one pivotally attaches each one end of a suspension rod and a leaf spring arranged along the longitudinal direction of the vehicle body to a vehicle body frame and Is connected to a support body that supports a spindle for mounting wheels. Then, at the time of connection, the other end of the leaf spring is rigidly connected to the support.

According to such a structure, the elasticity of the leaf spring can be utilized to exert the elastic holding function in the vertical direction, and it is not necessary to rigidly connect the leaf spring to the body frame side. It is not necessary to increase the strength of the vehicle body frame side more than necessary, and various advantages can be obtained in manufacturing the vehicle body.

[0004]

However, in the prior art, consideration for efficiently mounting each member such as the spindle, suspension rod, and leaf spring to the support has been lacking. Therefore, in the past,
The form of the support body provided with a plurality of mounting portions for mounting the above-mentioned members is considerably complicated, and the actual situation is that the support body is manufactured by casting or forging. As a result, conventionally, the manufacturing cost is high and the weight is high, and there is still room for improvement in this respect.

Further, conventionally, the work of connecting and attaching each member constituting the suspension has not been so easy, and there has been a problem in a series of assembling workability.

In addition, conventionally, U-bolts are generally used as fixing means for leaf springs. However, in the fixing means using the U bolt, U
Stress is likely to be concentrated on a part of the leaf spring that is tightened by the bolt, which may cause damage to the leaf spring and shorten the service life.

The present invention has been devised under such circumstances, and it is necessary to manufacture a support for supporting and connecting the respective parts of the independent suspension type suspension by a complicated work such as casting. The objective is to reduce the overall manufacturing cost without doing so and to make it possible to easily and properly connect the suspension parts.

[0008]

In order to solve the above problems, the present invention takes the following technical means.

That is, the present invention is provided with a suspension rod and a leaf spring, each of which is pivotally attached to the vehicle body frame at one end thereof and provided along the front-rear direction of the vehicle body, and a support for supporting a spindle for mounting wheels. An independent suspension type suspension in which the other ends of the suspension rod and the leaf spring are connected to the support body, wherein the support body faces each other at a constant interval at least along the vehicle width direction. A pair of left and right side portions, and a bottom surface portion that connects the lower portions of the pair of side surface portions to each other, and the spindle is provided on at least one of the left and right side portions of the support. The suspension rod is fixed by penetrating through the provided through hole, and the other end of the suspension rod is a pair of left and right side surfaces of the support. And is pivotally mounted between the pair of side surface portions, and the other end portion of the leaf spring is disposed between the bottom surface portion of the support and the plate-shaped body attached to the bottom surface portion. It is characterized by being sandwiched and fixed.

[0010]

In the independent suspension type suspension according to the present invention, the spindle is attached and fixed to the support body through the through hole provided in at least one of the pair of left and right side surface portions of the support body. It can be easily done by inserting the spindle through it. In addition, the connection for pivotally attaching the other end of the suspension rod to the support is performed by inserting the other end of the suspension rod between a pair of left and right side faces of the support and then bolting the support. It can be easily done by means. Further, the other end portion of the leaf spring can be attached and fixed to the support body easily by sandwiching the other end portion of the leaf spring between the bottom surface portion of the support body and the plate-shaped body attached to the bottom surface portion. Therefore, the work of attaching or connecting the above respective parts to the support becomes very easy, and the workability of a series of assembling work can be improved.

Moreover, since the above-mentioned support may have a form having at least a pair of left and right side surfaces and a bottom surface, unlike the conventional case, this support is manufactured by a complicated work such as casting or forging. It is not necessary and can be easily manufactured by cutting an appropriate member such as a square pipe. Therefore, the manufacturing cost of the entire suspension can be reduced, and further the weight can be reduced.

Further, when fixing the other end of the leaf spring, unlike the conventional general mounting, a fixing structure using U bolts or the like is not used, but a bottom of the support and a plate-shaped body separate from this. Since the leaf spring is sandwiched between the two with a constant area, it is possible to eliminate or reduce the concentration of stress on a part of the leaf spring, and extend the useful life of the leaf spring. There are also advantages such as

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described below.
A specific description will be given with reference to the drawings.

FIG. 1 is an overall schematic perspective view showing an example of an independent suspension type suspension according to the present invention, and FIG. 2 is a longitudinal sectional view of a main part thereof.

In FIG. 1, this suspension includes a spindle 1 for mounting a wheel T, and this spindle 1
A support body 2 for supporting the vehicle body, a suspension rod 3 arranged vertically in the longitudinal direction of the vehicle body, a leaf spring 4, an upper link 50 arranged vertically in the vehicle width direction, and The lower link 51 is provided. Further, a shock absorber bracket 7 for attaching the lower end portion of the shock absorber 6 is attached to the lower surface side of the support body 2.

The support 2 is formed, for example, by cutting a metal rectangular pipe material having a hollow rectangular cross section into a predetermined length, and the left and right sides facing each other along the vehicle width direction. A pair of side surface portions 2a and 2b, and these side surface portions 2
It has a top surface portion 2c and a bottom surface portion 2d that connect the upper and lower portions of a and 2b to each other.

The spindle 1 is attached to the support 2 so that the tip of the spindle 1 projects toward the outer side of the vehicle body. As shown in FIG. 2, the rear side of the collar portion 10 formed in the central portion of the spindle 1 has a different diameter through hole 20 formed in series on the side surface portions 2a and 2b of the support 2.
It is positioned and held on this support 2 by being inserted through a and 20b. Then, the outer periphery and the rear end of the collar portion 10 of the spindle 1 indicated by the symbols C1 and C2 are welded to the side surface portions 2a and 2b of the support body 2 to fix them.

In FIG. 1, the suspension rod 3 and the leaf spring 4 are respectively provided with one end portion 3 thereof.
a and 4a are pivotally attached to the vehicle body frame 8 via appropriate brackets 80a and 80b. This allows
The suspension rod 3 and the leaf spring 4 are
It is possible to swing in the up-down direction with these one ends 3a, 4a as fulcrums. One of the suspension rods 3 has a relatively large rigidity and is unlikely to be bent and deformed, while the other leaf spring 4 is relatively easily elastically deformed by a bending force and has an excellent elastic restoring force. It is something to demonstrate.

The other end 3b of the suspension rod 3
Are inserted between the side surface portions 2 a and 2 b of the support body 2.
Then, as shown in FIG. 2, a bolt 9a inserted through the holes 21a and 21b of the support 2 is inserted through the other end 3b. As a result, this suspension rod 3
The other end 3b of the bolt is pivotally attached in the vertical direction by the shaft of the bolt 9a.

The other end 4b of the leaf spring 4 is
It is arranged so as to come into contact with the lower surface of the bottom surface portion 2d of the support 2, and the bottom surface portion 2d and the bolts and nuts 9c,
The bracket 7 is fixed by being sandwiched between the bracket 7 and the upper surface portion 70 of the bracket 7 which is attached using 9d. This bracket 7
The upper surface portion 70 corresponds to an example of the plate-shaped body according to the present invention.

The bracket 7 is formed by cutting a steel material (angle material) having a substantially L-shaped cross section, and the vertical plate portion 71 bent downward from the upper surface portion 70 has a shock absorber. A shaft body 72 for mounting the lower end portion of 6 is provided so as to project inward of the vehicle body.

The upper link 50 and the lower link 51 are for exerting strength against so-called side force acting in the vehicle width direction. These respective one ends 50a, 51a are pivotally attached to the vehicle body frame 8 via appropriate brackets 80c, 80d so as to be rotatable in the vertical direction. In addition, these other ends 50
The b and 51b are rotatably connected to the support 2 or the bracket 7 in the vertical direction.

Specifically, the other end portion 50b of the upper link 50 is inserted between the pair of bracket pieces 22, 22 fixed to the side surface portion 2b of the support body 2. A bolt 9e penetrates through the other end 50b and is attached rotatably in the vertical direction about the shaft of the bolt 9e. Also, the other end 5 of the lower link 51
1b is inserted between a pair of bracket pieces 75 and 75 fixed to the side surface portion of the vertical plate portion 71 of the bracket 7, and the bolt 9f is penetrated. As a result, like the upper link 50, the other end portion 51b of the lower link 51 is formed.
Is also rotatably mounted in the vertical direction.

In the independent suspension type suspension having the above-described structure, when the vehicle T is bumped or suddenly turned and an upward force is applied to the wheels T mounted on the spindle 1, the support 2 is moved relative to the vehicle body frame 8. And then rise. Then, a bending force acts on the leaf spring 4 to cause bending deformation. Then, the elastic restoring force is exerted by the deformation of the leaf spring 4, and the force for returning the support body 2 and the wheel T to the original state is applied to the vehicle body frame 8. Therefore, elastic support of the vehicle body can be appropriately performed, and excellent ride comfort and maneuverability can be obtained.

On the other hand, in the above-mentioned suspension, the support 2 supporting or connecting the spindle 1, the suspension rod 3, the leaf spring 4 and other parts.
As described above, it can be easily manufactured by appropriately cutting, for example, a square pipe or the like and performing a predetermined boring operation. The bracket 7 for the shock absorber 6 can also be manufactured by appropriately performing a punching operation on an angle member or the like. Therefore, it is not necessary to manufacture each of these parts by a troublesome work such as casting, and the manufacture of each of these parts becomes easy. Also, the weight can be reduced.

Further, in the above suspension, the other end portion 4b of the leaf spring 4 is sandwiched between the bottom surface portion 2d of the support 2 and the top surface portion 70 of the bracket 7 having a constant area. Therefore, it is possible to avoid the problem that the stress is locally concentrated and acts on a part of the leaf spring 4. Further, in this embodiment, the bracket 7 for mounting the shock absorber 6 is effectively used as a member for sandwiching the other end portion 4b of the leaf spring 4 with the bottom surface portion 2d of the support body 2. There is also an advantage that the number of parts can be reduced.

Further, since the spindle 1 is attached to the support 2 only by inserting the spindle 1 into the through holes 20a and 20b and then performing welding, the attaching operation can be easily performed and the suspension rod can be mounted. Also for the work of connecting desired parts of each member other than the spindle 1 such as 3 and the leaf spring 4 to the support body 2, it is only necessary to substantially tighten the bolts at those parts. Therefore, a series of assembly work of the suspension is easy.

In the above embodiment, two sets of bracket pieces 22 and 75 are provided on the support body 2 and the bracket 7, and the upper link 50 and the lower link 51 can be connected to each of these portions. Link 50,
There is no need to separately provide a dedicated support means for connecting the 51, and there is an advantage that the structure of the entire suspension can be further simplified. However, in the invention of the present application, the configuration relating to the attachment of the upper link 50 and the lower link 51 is not an essential requirement, and does not necessarily have to be configured as in the above embodiment.

Further, in the above embodiment, the two through holes 20 provided in the pair of left and right side surface portions 2a, 2b of the support body 2 are provided.
Although the spindle 1 is inserted through both a and 20b, the present invention is not limited to this. In the present invention, for example, the through hole 20a may be provided only in one of the side surface portions 2a and 2b of the support body 2a, and the spindle 1 may be passed through the through hole 20a and then fixed. . This fixing means is not limited to welding, and may be fixed using, for example, a nut.

Further, in the above embodiment, the support 2 has a hollow rectangular cross section, but the present invention is not limited to this.
The specific cross-sectional shape of is not limited to this. For example, when the support 2 shown in the above-mentioned embodiment is taken as a specific example, the upper surface 2c of the support 2 is not always necessary, and the upper surface 2c may not be provided.

Further, in the present invention, the design can be changed in various ways for the specific construction of each portion other than the above. For example, as means for pivotally attaching the other end portion 3b of the suspension rod 3 to the side surface portions 2a, 2b of the support body 2, for example, the other end portion 3b of the suspension rod 3 is made to project a shaft portion, and this shaft portion is Holes 21 on the side surfaces 2a and 2b of the support 2
You may make it support by inserting in a and 21b.

Besides, it goes without saying that the present invention can be used not only as a suspension for the rear wheels of a vehicle but also as a suspension for the front wheels.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an example of an independent suspension type suspension according to the present invention.

FIG. 2 is a sectional view of a main part of the independent suspension type suspension shown in FIG.

[Explanation of symbols]

 1 Spindle 2 Supports 2a, 2b Side part (of support) 2d Bottom part (of support) 3 Suspension rod 3a One end (of suspension rod) 3b Other end (of suspension rod) 4 Leaf spring 4a One end ( Leaf spring) 4b Other end (of leaf spring) 6 Shock absorber 7 Bracket 8 Body frame 20a, 20b Through hole 70 Bracket upper surface (plate) T Wheel

Claims (1)

[Claims] 1. One end of each body is pivotally attached to a body frame,
A suspension rod and a leaf spring are provided along the front-rear direction of the vehicle body, and a support body that supports a spindle for mounting wheels, and the other end portions of the suspension rod and the leaf spring are connected to the support body. An independent suspension type suspension, wherein the support connects at least a pair of left and right side portions facing each other at a constant interval along the vehicle width direction and lower portions of the pair of side portions to each other. A bottom surface portion, and the spindle is fixed by penetrating through a through hole provided in at least one of the pair of left and right side surface portions of the support, and the other end of the suspension rod. The portion is inserted between the pair of left and right side surface portions of the support body and is pivotally connected between the pair of side surface portions, and An independent suspension type suspension characterized in that the other end of the spring is sandwiched and fixed between the bottom of the support and a plate attached to the bottom.