JPH04127440U - Urethane bumper in suspension system - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a urethane bumper that can prevent corrosion and rust of a piston rod due to water and increase the fixing force to the piston rod without sacrificing the advantage of urethane bumper's ease of deformation. do. [Structure] The bumper is characterized in that a portion of the inner circumference of the urethane bumper body 7a that contacts the piston rod 3 is made of a rubber material 7b.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is based on urethane used in strut suspension systems for vehicles such as automobiles. It concerns the bumper.

0002

[Conventional technology]

In a strut suspension system, it absorbs the impact when the shock absorber pushes up. Bumpers used for storage are traditionally made of rubber or urethane. There is.

0003 The urethane bumper, which is made of urethane, is based on Japanese Utility Model Application Publication No. 63-20547. An example of this is shown, but it is easier to deform and has a greater amount of shock absorption than a rubber one. It has the advantage of being

0004

[Problem that the idea aims to solve]

Urethane bumpers are made of open-cell urethane. The water adhering to the bumper is absorbed into the bumper, and as shown in Figure 3, the urethane bumper It seeps into the contact part c of the par a with the piston rod b, and in the contact part c, the piston There is a problem that the stone rod b corrodes and rusts.

[0005]

[Means to solve the problem]

In order to solve the above problems, this invention has a piston on the inner circumference of the urethane bumper body. It is characterized in that the part that comes into contact with the rod is made of a rubber material.

[0006]

[Effect]

According to the present invention, the portion of the urethane bumper that comes into contact with the piston rod is It is made of a rubber material that does not allow water to pass through, so it does not adhere to or be absorbed by the urethane bumper body. As a result of preventing the moisture from seeping into the piston rod contact area, Corrosion and rusting of the piston rod can be prevented.

[0007] Also, the urethane bumper is fixed to the piston rod with its tension, but the piston By using rubber material for the contact part of the tongue rod, the tension force is increased and the fixing force is increased. You can achieve great results.

[0008] Furthermore, in this invention, the rubber material is attached to the piston rod on the inner circumference of the urethane bumper body. Since the structure is limited to the parts that come into contact with the surface, the deformation of urethane It is possible to maintain the advantages of being easy and having a large amount of shock absorption.

[0009]

【Example】

FIG. 1 shows a first embodiment of the invention. 1. Attach the lower end to the knuckle on the vehicle side (Fig. (not shown) is connected to the shock absorber 2, which is connected to the shock absorber 1. The lower end of the coil spring 2 is a coil spring arranged so as to surround the shock absorber. The coil spring 2 is supported by a spring support part 4 attached to the main body of the quad absorber 1. The upper end is in contact with the spring receiving member 5. The lower surface of the spring receiving member 5 is provided with a seal. Urethane bumper to absorb shock when the main body of shock absorber 1 is pushed up. -7 are placed in contact with each other.

0010 The spring receiving member 5 is supported by an intermediate metal member 9 via a bearing 8, and The upper end of the piston rod 3 of the shock absorber 1 is fixedly connected to this intermediate metal member 9. has been established. Then, the intermediate metal member 9 is attached to the mounting member 1 via the support rubber 10. 1, and this mounting member 11 is fixed to the vehicle body 15 with bolts and nuts 12. has been done. A dust cover 6 is attached to the lower outer periphery of the urethane bumper 7. It is being

[0011] The main body 7a of the urethane bumper 7 is made of open-cell urethane. , a portion of the inner periphery that contacts the piston rod 3 is made of a rubber material 7b.

0012 Specifically, the overall shape of the urethane bumper 7 is designed to facilitate deformation in the compression direction. It is formed into a bellows shape, and its inner periphery contacts the part that contacts the piston rod 3. Although the rubber material 7b has a shape in which there are alternating parts that do not contact each other, the rubber material 7b It is provided only in certain areas. As a method for integrally joining the rubber material 7b to the main body 7a, Although it is preferable to use insert molding, it is also possible to use adhesive methods, etc. be.

[0013] The urethane bumper 7 is fixed to the piston rod 3 by its own tension force. It will be done.

[0014] FIG. 2 shows a second embodiment of the invention. In this example, the urethane bumper A rubber material 7b similar to that of the first embodiment is attached to the inner circumference of the piston rod 3 at a portion that contacts the piston rod 3. In addition to providing these rubber members 7b, a A thin rubber material 7c is also provided in the non-contact areas. Both rubber materials 7b and 7c are integrated It is molded and joined to the urethane main body 7a by insert molding. In addition, thin The meat rubber material 7c is formed so as not to impair the deformability of urethane. There is.

[0015]

[Effect of the idea]

According to the present invention, without sacrificing the advantage of urethane bumper's ease of deformation, , prevents corrosion and rusting of the piston rod due to water, and provides solidity to the piston rod. It is possible to provide a urethane bumper that can increase constant force.

[Brief explanation of drawings]

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

FIG. 2 is a sectional view showing a second embodiment of the present invention.

FIG. 3 is a schematic diagram showing a conventional example.

[Explanation of symbols]

3 Piston rod 7 Urethane bumper 7a Main body 7b Rubber material

Claims (1)

[Scope of utility model registration request] 1. A urethane bumper for a suspension system, characterized in that a portion of the inner periphery of the urethane bumper body that contacts a piston rod is made of a rubber material.