JPH0487814A - Bound stopper for leaf spring type suspension - Google Patents

Abstract

PURPOSE:To prevent the generation of friction noise due to collision of a leaf spring regardless of the mounting position of a bound stopper by mounting the cushion of a resilient substance rotatable around an axle on a car body or the leaf spring. CONSTITUTION:A bound stopper 20 is mounted on a leaf spring type suspension to support a wheel 24 through a leaf spring 22 arranged in the longitudinal direction of a car body 18. The bound stopper regulates bouncing of the leaf spring 22 and contains a cushion 26. The cushion 26 is formed of rubber, resin, and other resilient substance, and the car body 18 is rotatably mounted on the leaf spring 22 through an axle. Namely, the bound stopper 20 comprises the cushion 26, a roller 38, an axle 40, and a bracket 42. The cushion 26 is cylindrical rubber and adhered on the outer periphery of the roller 38, and the roller 38 is rotatably mounted on the bracket 42 by means of the axle 40. The bracket 42 is mounted on a side member 28 by means of bolts 44.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a bound stopper for a leaf spring type suspension.

(Conventional Technique #T) In the leaf spring type suspension, which supports the wheels by leaf springs arranged in the longitudinal direction of the vehicle body, the bound stopper is attached to the side member of the vehicle body (
It is fixedly attached to a leaf spring (Japanese Utility Model Application No. 1-127006) or a leaf spring (Japanese Utility Model Publication No. 1-128807), and is configured so that the bound stopper and the leaf spring come into contact with each other during a large bounce.

(Problem to be solved by the invention) When a bound stopper and a leaf spring collide when a vehicle is traveling on a rough road, a slight relative slip may occur between the bound stopper and the leaf spring. . That is, as shown in FIG. 3, when the load F is applied manually during bouncing, the end surface of the bound stopper 10 and the upper surface of the leaf spring 11 do not hit uniformly over the entire surface facing each other, and one side is tilted relative to the other. At this abutting point, the bound stopper 1 faces approximately in the longitudinal direction of the leaf spring 11.
A minute displacement X of 0 occurs, and this minute displacement causes a relative slip S in the tangential direction between the bound stopper 10 and the leaf spring.

As shown in FIG. 4, even when the bound stopper 12 is formed into a substantially elliptical rotating body, the leaf spring 11
When the leaf spring hits the bound stopper 12 from an inclined direction, a slight displacement X of the bound stopper 12 similarly occurs, and a relative slip S occurs between the bound stopper 12 and the leaf spring 11.

When the above-mentioned relative slip occurs between the bound stopper and the leaf spring, friction occurs and a so-called stick-slip phenomenon occurs, resulting in the generation of friction noise. This fricative sound is originally small, but in recent years, as a result of the overall reduction in the noise level in the vehicle interior, the fricative sound can be heard as abnormal noise.

In order to prevent the generation of frictional noise, the leaf spring should perpendicularly hit the contact surface of the bound stopper and prevent minute displacement of the bound stopper. In practice, this is difficult due to variations in the human force conditions of the load.

Therefore, an object of the present invention is to provide a bound stopper for a leaf spring type suspension that can prevent the generation of Fj friction noise due to the collision between the bound stopper and the leaf spring without considering the mounting position of the bound stopper. There is a particular thing.

(Means for Solving the Problems) The present invention provides a bound stopper for a leaf spring type suspension that supports wheels by leaf springs disposed in the longitudinal direction of a vehicle body. It includes a resilient cushion attached thereto and rotatable about the axis.

(Operation and Effect) Bouncing occurs while the vehicle is driving on rough roads, etc.
When the cushion and leaf spring collide, if the leaf spring is not perpendicular to the cushion but is tilted, there will be a force that tends to relatively displace the cushion in the tangential direction at the point of contact between the cushion and the leaf spring. However, since the cushion rotates around the axis due to the force, no minute displacement occurs in the cushion in the longitudinal direction of the leaf spring.

Therefore, no relative slip occurs between the cushion and the leaf spring, and no FJ friction noise occurs due to this relative slip.

Since no relative slip occurs between the cushion and the leaf spring, the durability of the cushion can be improved.

(Example) As shown in FIGS. 1 and 2, the bound stopper 20 prevents the bouncing of the leaf springs 22 in a leaf spring type suspension in which the wheels 24 are supported by the leaf springs 22 arranged in the longitudinal direction of the vehicle body 18. and includes a cushion 26.

A side member 28 is provided on the vehicle body 18, and the leaf springs 22 are arranged along the side member 28 in the front-rear direction. The front end of the leaf spring 22 is swingably connected to a bracket fixed to the side member 28, and the rear end of the leaf spring 22 is swingably connected to a bracket fixed to the side member 28 via a shackle. movably connected. The above configuration is known.

The wheel 24 is coupled to a shaft 32 rotatably supported by the axle housing 30 .
0 is attached to the leaf spring 22 by a U port 34 and a spring seat 36.

The cushion 26 is made of rubber, resin, or other elastic material.
It is attached to the vehicle body 18 or the leaf spring 22 via a shaft so as to be rotatable around the shaft.

In the illustrated embodiment, the bound stop 20 comprises a cushion 26, a roller 38, a shaft 40, and a bracket 42. The cushion 26 is made of cylindrical rubber and is adhered to the outer periphery of a roller 38, which is rotatably attached to a bracket 42 by a shaft 40. Bracket 42 is attached to side member 28 by port 44.

Incidentally, in the above embodiment, the cushion 26 is attached to the side member 28 of the vehicle body by the shaft 40, the bracket 42, etc., but instead of this, the bracket is placed above the leaf spring 22, and the cushion 26 is attached to the side member 28 by the U port 34. The same effect can be obtained by attaching it to the leaf spring 22.

[Brief explanation of drawings]

Fig. 1 is a side view of the bound stopper according to the present invention, Fig. 2 is a side view of the bound stopper according to the present invention;
The figure is a perspective view of a leaf spring suspension equipped with a bound stopper, and FIGS. 3 and 4 are side views showing the function of a conventional bound stopper. 20: Bound stopper, 22: Leaf spring, 26: Cushion, 38: Roller, 40: Shaft.

Claims (1)

[Claims] A bound stopper for a leaf spring type suspension that supports wheels by leaf springs arranged in the longitudinal direction of a vehicle body, the bounce stopper being attached to the vehicle body or the leaf spring via a shaft and capable of rotating around the shaft. Bound stopper for leaf spring suspension, including body cushion.