JPH0665634U - Layered leaf spring with silencer - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a leaf spring that does not generate squeak noise and has a long life. [Structure] The middle leaf 1 has silencers 4 on both sides thereof.
And a leaf spring having a silencer 4 on one of its sliding surfaces on the uppermost leaf 1 and the lowermost leaf 1. [Effect] Since the sliding surfaces are in contact with each other between the silencers 4, wear of the silencer is small. Therefore, it has a long life.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a leaf spring having a silencer between upper and lower leaves of a leaf spring.

[0002]

[Prior art]

 A large number of leaf springs are used as a part of suspension systems, which are mainly suspension parts of automobiles. In this leaf spring, the relative sliding between the leaves that are in contact with each other causes a noise (hereinafter referred to as squeak noise) that metal rubs from the leaf end with high surface pressure.

In recent vehicles, the engine, which has been conventionally considered as a source of noise, has been improved and the noise generated from the vehicle has been reduced. Therefore, the squeaking noise generated from the leaf springs becomes noticeable. Came. In particular, in box-type vehicles such as buses, the body itself acts as a resonance box, causing gritty noise and complaining.

As a solution to this, as shown in FIG. 3, a plate-shaped body 4 called a silencer, which is mainly made of synthetic resin, is mounted so as to be sandwiched between the ends of the leaves 1 of the leaf spring. It was Explaining in detail, a through hole 1 is provided at the end of each leaf 1 excluding the uppermost leaf, and a silencer 4 having a protrusion 3 having a size that fits in the through hole 1 is attached to the upper surface of each leaf 1. It is a leaf spring.

However, since each leaf 1 is heat-treated, a so-called black skin (iron oxide film) is formed on the surface thereof and is not smooth. Further, since the leaf spring is a foot part, soil, muddy water, etc. infiltrate between the leaves, so that the silencer 4 that is rubbed against the leaves is extremely worn and its life is shortened. . Furthermore, in reality, each silencer 4 and the leaf 1 on the silencer 4 are caught in the through hole 2 and the slide between the silencer 4 and the leaf 1 is not sufficiently exerted.

[0006]

[Problems to be solved by the device]

 The present invention is intended to provide a leaf spring that improves the slippage between the leaf and the silencer, fully exerts the function of the silencer, and prolongs the life of the silencer.

[0007]

[Means for Solving the Problems]

 The structure of the present invention for solving the above problems is a leaf spring as described in the scope of claims for utility model registration. That is, the leaf spring is characterized in that each leaf 1 has a sliding surface provided on each of the sliding surfaces facing each other.

Explaining in detail with reference to the drawings, it is a leaf spring in which a silencer 4 is sandwiched between the sliding surface of a leaf 1 having a through hole 2 as shown in FIG. However, since the uppermost leaf and the lowermost leaf have a single sliding surface, the silencer 4 is provided on one surface, and the intermediate leaf 1 has the silencer 4 on both surfaces. Since the silencer 4 has the projections 3 sized to fit into the through holes 2, even if the leaves 1 slide relative to each other, they can slide together with the leaf 1.

The uppermost leaf is not a through hole, but is provided with a recess 6 having a size that allows the protrusion 3 of the leaf to be inserted. The leaf spring shown in FIG. 2 is provided with two through holes 2 or two recesses 6 for each leaf 1, and a silencer 4 is also provided with two projections 3 that enter the through holes. It shows a specific example.

According to the present invention, as is apparent from the above description, the silencer 4 is always in contact with the opposing ridge surface of each leaf 1, and the leaves are in direct contact like the conventional leaf springs. The leaf and silencer do not slide against each other. Further, since the through hole 2 of the leaf is filled with the protrusion 3 of the silencer 4, the silencer 4 does not scratch the through hole 2 of the adjacent leaf 1 and hinder the sliding like the conventional leaf spring. . Therefore, wear of the silencer 4 is reduced and its life is extended. Therefore, the frequency of replacement of the leaf springs or silencer is reduced, and the labor cost and parts cost for the replacement can be reduced.

[0011]

[Effect of device]

 As described above, in the leaf spring of the present invention, the wear of the silencer is small, the life of the leaf spring is long, and the replacement frequency is low, so the maintenance and management costs can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view of a specific example of one end of a leaf spring of the present invention,

FIG. 2 is a sectional view of another embodiment of one end of the leaf spring of the present invention,

FIG. 3 is a cross-sectional view of a specific example of one end of a conventional leaf spring.

[Explanation of symbols]

 1 Leaf 2 Through Hole 3 Protrusion 4 Silencer 5 Bushing 6 Recess

Claims (1)

[Scope of utility model registration request] 1. A leaf spring including a leaf and a silencer on each of the sliding surfaces of the leaves facing each other.