JPS6015685Y2 - Bound stopper made of urethane foam - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bounce stopper made of urethane foam, and more specifically to prevent swinging arms, leaf springs, etc. installed in automobile suspension systems from hitting the vehicle body when the automobile makes a large bounce. This invention relates to a bounce stopper made of urethane foam that prevents.

Generally, rubber bound stoppers were used as the above-mentioned bound stoppers, but rubber bound stoppers are heavy and have little flexibility between load and displacement.
There is a problem in that when a load is applied, there is a large displacement in the direction perpendicular to the direction of the load, that is, there is large lateral wobbling.

In order to solve the above problem, bound stoppers made of urethane foam have been used, but unlike bound stoppers made of rubber, these bound stoppers cannot be installed on metal car bodies. Since brackets cannot be attached by welding, molding, especially
It is formed with a mounting bracket embedded.

However, when a load is applied to the bound stopper made of foamed urethane during use, the degree of lateral wobbling is different between the part where the mounting bracket is buried and the part made only of the foamed urethane material without such buried objects. In some cases, cracks occur at the boundary, or separation occurs between the mounting bracket and the urethane foam, resulting in an unsatisfactory relationship between load and displacement.

Therefore, an object of the present invention is to solve the above-mentioned problems occurring in bound stoppers made of urethane foam.

In this invention, the outer diameter of the main body part of the polyurethane stopper, which extends from the vehicle body attachment end where the mounting bracket is embedded toward the free end, is smaller than the outside diameter of the vehicle body attachment end. It is characterized by

Examples will be described below with reference to the drawings.

As shown in FIG. 1, the urethane foam bound stopper 10 of the present invention includes a stopper 12 made of urethane foam, and a metal mounting bracket 14 embedded within the stopper 12.

The stopper 12 has one side formed at the vehicle body attachment end 16 and the other side formed at the free end 18.
A mounting bracket 14 is buried in the vicinity of.

A through hole 20 is provided in the center of the mounting bracket 14, and the mounting bracket 14 is mounted to the vehicle body using a bolt passing through the through hole.

The outer diameter of a main body portion 24 of the stopper 12 that extends from the vehicle body attachment end portion 22 in which the mounting bracket 14 is embedded toward the free end 18 is smaller than the outer diameter of the vehicle body attachment end portion 22.

As in this example, from the vehicle body attachment end portion 22, through a reduced diameter portion 26 whose outer diameter gradually becomes smaller, to an intermediate portion 28 that occupies most of the main body portion 24, and further from this intermediate portion 28 to a second reduced diameter portion 30. The outer diameter of the main body portion 24 is gradually adjusted to the vehicle body attachment end portion 22, and so on.
Alternatively, the main body portion 24 may be formed such that the outer diameter decreases approximately linearly from the body attachment end portion 22 to the free end 18.

In short, the outer diameter of the main body portion 24 may be smaller than the outer diameter of the vehicle body attachment end portion 22.

In this case, the boundary from the vehicle body attachment end portion 22 to the main body portion 24 is formed so as to be gradually reduced in diameter.

The planar shape and length of the stopper 10 can be set arbitrarily.

Bound stopper 10 of the present invention formed as described above
As shown in FIG. 2, for example, in an automobile suspension system, the mounting bracket 14 is attached to a vehicle body 34 by passing a bolt through a through hole 20 provided in a mounting bracket 14.

However, when the car bounces while running, the swing arm 36 swings, and when the degree of bounce is small, the swing arm 36 does not hit the bounce stopper 10 and the spring 38
The fluctuation is attenuated by

However, when the degree of bouncing increases and exceeds the set limit, the raised portion 40 of the swinging arm 36 abuts against the bound stopper 10, and a load is applied to the bound stopper 10.

As a result, the bound stopper 10 is deformed and exhibits lateral bulge, but the main body portion 24 is attached to the vehicle body attachment end portion 2.
2, it is softer and deforms significantly, but the end portion 22 that attaches to the vehicle body is difficult to deform and deforms only slightly.

Therefore, the relative movement between the mounting bracket buried in the mounting end of the vehicle body and the foamed urethane material is reduced.
The possibility of cracks occurring is greatly reduced.

According to the present invention, although the problem of the rubber bound stopper is solved, it effectively prevents the occurrence of a situation where cracks occur and reduce the bounce deterrent force, so its function is sufficient. It will be demonstrated.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view of the urethane foam bound stopper of the present invention, and FIG. 2 is an explanatory diagram of the state of use. 10: Bound stopper, 12: Stopper, 14: Mounting bracket, 16: Vehicle body mounting end, 18 Two free ends, 22:
Vehicle body attachment end portion, 24: Main body portion.

Claims (1)

[Scope of utility model registration request] It includes a polyurethane stopper formed on one side at the vehicle body attachment end and on the other side at the free end, and a mounting bracket to the vehicle body embedded in the vehicle body attachment end portion of the stopper, and of the stopper, the mounting bracket A bound stopper made of urethane foam, in which the outer diameter of the main portion extending from the vehicle body attachment end portion where the is buried toward the free end is smaller than the outer diameter of the vehicle body attachment end portion.