JPH0643552Y2 - Leaf spring support device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a support device for a leaf spring, and is particularly suitable for firmly supporting the body side end of a reinforced plastic (FRP) leaf spring. The present invention relates to a support device for leaf springs.

[Conventional technology]

In a conventionally used FRP leaf spring, a supporting device having a structure as shown in FIGS. 3 and 4 is used.

For example, in the device having the structure shown in FIG. 3, a large number of bolt holes 34 are provided at the body side end portion of the leaf spring 33 for supporting the axle housing 32 on the body 31 of the vehicle. It is often the case that a bolt 35 and an insulator 36 are used via 34 and they are fixed to each other.

Further, in the conventional example as shown in Japanese Utility Model Laid-Open No. 56-103305, a structure is used in which the body side end of the cantilever type leaf spring supports the axle housing via a body bracket.

[Problems to be solved by the invention]

By the way, the cantilever type leaf spring has a drawback that the force in the front-rear direction of the body is likely to be slightly disadvantageous as compared with the conventional vertically mounted leaf spring having both ends. In order to eliminate the drawback, it is necessary to support the leaf spring body side end portion with a strong structure with respect to the body.

For that purpose, the best method is to fix it directly to the leaf spring body using bolts, but in that case, in addition to transmitting the vehicle vibration directly to the body, The drawback is that noise cannot be prevented.

Further, when fixing with a bolt through an insulator as in the above-mentioned conventional technique, it is not possible to increase the size of the insulator mounting hole due to its strength problem, which narrows the tuning range of the insulator. However, there is a problem that the compliance in the front-back direction (A-B direction) cannot be large.

An object of the present invention is to support the leaf spring, which solves the above-mentioned problems and effectively reduces the vibration of the leaf spring in the longitudinal direction, thereby increasing the degree of freedom in setting the elastic body that gives compliance. It is to provide a device.

[Means for solving problems]

In order to achieve such an object, a leaf spring supporting device according to the present invention is a leaf spring supporting device for supporting a leaf spring on a body side member, wherein the leaf spring has a convex portion at a body side end portion, A member for supporting the leaf spring on the body is housed in a bracket fixed to the body, and an engaging member made of an elastic material having a concave portion for engaging the convex portion and a member provided apart from the engaging member are provided. It is provided with a holding member made of an elastic material, which has both sides on the shorter side of the middle portion of the spring and surfaces for supporting the upper and lower surfaces.

[Action]

By engaging the convex portion of the leaf spring with the engaging portion of the engaging member made of an elastic material, a force acting in the longitudinal direction of the leaf spring is received. Further, the leaf spring is held at the intermediate position by the holding member, and receives the force in the lateral direction and the force acting in the vertical direction of the leaf spring.

〔Example〕

 Hereinafter, the present invention will be described based on an embodiment shown in the drawings.

1 and 2 relate to an embodiment of the present invention and show a cantilever leaf spring supporting device 1 which is an example of a leaf spring supporting device. A first insulator device 2 and a second insulator device are shown. The device 3 is provided.

The leaf spring 5 is made of FRP, and a convex portion, for example, a cylindrical body 6 is formed at one end of the leaf spring 5 on the body side.
A member (not shown) for locking the axle housing is formed at the other end.

The first insulator device 2 forms an outer member by the front body bracket 8 and the front bracket 9, and has a front insulator 10 made of an elastic material, which is an engaging member, for example, a relatively soft rubber inside the outer member. ,
11 respectively, and the two insulators 10 and 11
The recesses 10a and 11a are formed so as to face each other, and the cylindrical body 6 of the leaf spring 5 is housed and engaged in the substantially cylindrical engaging portion 12 formed by the two recesses 10a and 11a.

The second insulator device 3 forms an outer member by the rear-side body bracket 13 and the rear-side bracket 15, accommodates the rear-side insulators 16 and 18 therein, and the two insulators 16 and 18 respectively. The recesses 16a and 18a are formed in a state of facing each other. And 2
The abutment member 19 of a substantially rectangular prism formed by the two recesses 16a and 18a abuts both lateral surfaces and upper and lower surfaces of a middle portion of the leaf spring 5. Here, the contact member 19
Is the first contact with both sides of the leaf spring 5 on the shorter side.
The contact member 19A is divided into a second contact member 19B that contacts the upper and lower surfaces of the leaf spring 5.

The respective members configured as described above are mounted on the body 20 of the vehicle as shown in FIG. That is, the first insulator device 2 and the second insulator device 2 are provided on the lower surface of the body 20 of the vehicle.
Of the leaf spring 5 are fixed to the first insulator device 2 and the second insulator device 3 of FIG. The insulator device 3 is configured so as to support an intermediate part of the leaf spring 5.

Next, the operation of the present invention will be described.

Since the cylindrical body 6 of the leaf spring 5 is engaged with the engaging portion 12 made of soft rubber, the force acting on the leaf spring 5 in the longitudinal direction (vertical direction) is received by the engaging portion 12, Thereby, a large compliance is taken in the longitudinal direction of the leaf spring 5, that is, the front-back direction of the body 20, and the vibration of the vehicle is absorbed. Further, since the lateral side surfaces and the upper and lower surfaces of the leaf spring 5 are in contact with the first and second contact members 19A and 19B made of hard rubber, respectively, the leaf spring support device 1 of the present embodiment.
Has a rigidity enough to deal with the lateral and vertical forces of the leaf spring 5.

In addition, in the leaf spring support device 1 of the present embodiment, the leaf springs 5 are supported at two locations, so that the distance between the two insulator devices 2 and 3 is also the vibration characteristics of the leaf springs 5, or other conditions. It is possible to arbitrarily change it depending on the situation, and even if there is a slight gap or the like between the insulator and the surface of the leaf spring 5, it will be easily eliminated by tightening with the bolt 21. However, it is not necessary to manufacture those parts particularly precisely.

Further, the insulator for supporting the leaf spring 5 can have any shape, and the material and thickness of the rubber can be changed depending on the weight of the vehicle and other conditions. . In addition, the insulator is not limited to rubber, and in addition,
It is also possible to use other materials as long as they have similar elasticity.

The cylindrical body 6 of the leaf spring 5 is
Is formed integrally with the body-side short portion when the FRP is molded by FRP, but other manufacturing methods, for example, a method in which the columnar body 6 is a separate body and is fixed to the leaf spring 5 by a procedure such as adhesion, Of course, it can be used, and even if some unevenness remains in the portion that comes into contact with the insulator device after its manufacture, it is not necessary to carry out the correction work. In the present embodiment, the convex portion 6 of the leaf spring 5 is formed in a cylindrical shape, but this is only required to be able to receive the load in the front-rear direction and does not necessarily have to be a cylindrical shape. This may be formed in a cylindrical shape or a prism shape as long as the end portion of the leaf spring 5 forms a convex portion. Further, the insulators 16 and 18 may be non-elastic bodies, and in that case, the bracket is unnecessary.

[Effect of device]

As described above, according to the present invention, it is possible to firmly support the body side of the leaf spring, and the longitudinal vibration transmitted through the axle housing is absorbed by the insulator made of an elastic material, and ,
Since the degree of freedom in setting the insulator can be increased, the compliance in the front-rear direction of the body can be increased, and the cause of noise can be reduced.

Further, by adjusting the position of the holding member back and forth, it is possible to easily adjust the elastic force with respect to the vertical force of the leaf spring.

Also, the FRP leaf spring of the present invention does not need to be machined after its manufacture, thus simplifying its manufacturing process. Furthermore, since the insulator that comes into contact with the leaf spring is made of elastic material such as rubber, even if there are some irregularities in the shape of the FRP leaf spring, it is not necessary to correct it and its manufacture No particular precision is required.

[Brief description of drawings]

1 and 2 relate to an embodiment of the present invention. FIG. 1 is an exploded perspective view of a supporting device for a leaf spring, FIG. 2 is a longitudinal sectional view showing a mounting structure of the supporting device for a leaf spring, and FIG. FIG. 4 and FIG. 4 relate to a conventional example, FIG. 3 is a perspective view showing a mounting structure of a leaf spring, and FIG. 4 is an exploded perspective view showing a structure of an end portion of the leaf spring. 1 ... Leaf spring support device, 5 ... Leaf spring, 6 ... Cylindrical body as an example of convex portion, 8 ... Front side body bracket, 9 ... Front side bracket,
10, 11 ... Insulator which is an engaging member, 12 ... Engaging portion, 19 ... Abutting member, 19A ... First abutting member, 19B ...
Second contact member.

Claims (1)

[Scope of utility model registration request] 1. A leaf spring supporting device for supporting a leaf spring on a body side member, wherein the leaf spring has a convex portion at an end portion on the body side, and a member for supporting the leaf spring on the body is fixed to the body. And an engaging member made of an elastic material that has a concave portion that engages with the convex portion and that is provided separately from the engaging member and that is located on both short side surfaces of the intermediate portion of the leaf spring. A support device for a leaf spring, comprising: a holding member made of an elastic material having a surface for supporting a lower surface.