JPS5813767B2 - Coil spring seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coil spring seat that fits onto an end of a coil spring, and more particularly to a coil spring seat that is provided with a cushioning material interposed between corresponding wires of the coil spring. Concerning Yoza.

When a coil spring made of helically wound strands is used in a device that is subject to impact loads, such as a vehicle suspension system, the strands may collide with each other and produce a large amount of noise.

In particular, coils with non-linear load-deflection characteristics, such as unequal pitch coil springs with varying pitch between wires, or tapered wire coil springs using wires tapered in the length direction. Since a spring obtains nonlinear characteristics due to the close contact between the wires in the low-rigidity portions, collisions between the wires due to the action of impact load are inevitable.

For this reason, a method has been proposed to absorb the impact force by inserting a cushioning material between the wires, but it is necessary to securely hold the cushioning material so that it does not escape from between the wires of the coil spring, which repeatedly expands and contracts at high speed. This is extremely difficult.

The present invention aims to reduce the noise generated when a collision load is applied by providing a cushioning material in the main body of a coil spring seat to prevent collisions between the wires of the coil springs. It is.

Hereinafter, one embodiment of the present invention will be described in detail based on the accompanying drawings.

A first embodiment of the present invention is shown in FIGS. 1 and 2.

In the figure, reference numeral 51 denotes a main body having a circular planar surface, and a spiral slope 53 is formed on the outer periphery of the upper surface, and a device groove 54 having a semicircular cross section is bored in this slope 53.

Reference numeral 55 is a bellows-shaped cushioning material with a spirally protruding bulging portion 56, which is formed integrally with the main body 51 at the inner edge of the opening of the device groove 54, and at the upper end. An air vent hole 57 is provided in the center.

In this embodiment, when the coil spring S is fitted onto the upper part of the buffer material 55 and rotated, it descends along the spiral bulge 56, and the first turn of the wire S1 fits into the device groove 54. Since the bulging portions 56 are interposed between the first turn of the strand S1 and the second turn of the strand S2, and between the second turn of the strand S2 and the third turn of the strand S3, a load is applied to the coil spring S. acts and is compressed as shown in FIG. 2, each strand S1. The bulge 56 is compressed between S2 and S3 to prevent the strands from colliding with each other, thereby suppressing noise generation.

A second embodiment of the invention is shown in FIG.

In the figure, 61 is a main body having a circular planar shape with a spiral slope 63 formed on the outer periphery of the upper surface, a device groove 64 having a semicircular cross section is bored in the slope 63, and the outer wall is formed higher than the inner wall. ing.

Reference numeral 65 denotes a bellows-shaped shock absorbing material with a spirally protruding bulge 66, which is formed integrally with the main body 1 at the outer edge of the opening of the device groove 64.

In this embodiment, unlike the first embodiment, the strands of the coil spring S fit inside the device groove 64 and the bulge 66 of the buffer material 65, but the effect is the same as in the first embodiment. It is.

As clarified by the above description, the coil spring seat of the present invention is inserted between the strands of the coil spring in a main body that has a device groove into which the end of the coil spring is almost tightly fitted. Since the bellows-shaped cushioning material is provided, the coil spring can be held in a fixed position in the same way as conventionally known coil spring seats.
In addition, it has a function of preventing interference between the coil spring and the fixture, and the elastic contraction of the bellows-shaped cushioning material alleviates collisions between the wires of the coil spring, reducing noise.
This has the effect of preventing partial impact stress from acting on the strands and improving durability.

Furthermore, since the buffer material blocks or suppresses the movement of the wires of the coil spring, it has the effect of preventing surging.

[Brief explanation of drawings]

1 to 3 show an example of the present invention; FIGS. 1 and 2 are longitudinal cross-sectional views of the first embodiment, and FIG. 3 is a longitudinal cross-sectional view of the second embodiment. 51, 61: Main body, 54, 64: Device groove, 55, 65:
Buffer material.

Claims (1)

[Claims] 1. For coil springs, characterized in that a bellows-shaped cushioning material interposed between the strands of the coil spring is integrally formed on a main body in which a device groove into which the end of the coil spring is almost tightly fitted is formed. seat.