Collision stop for suspension apparatus

Abstract

Provided is a shock stopper made of polyurethane foam for a suspension device, which can prevent the generation of unpleasant abnormal sound caused by friction against a spring seat when the stopper acts. In the impact stopper (46) made of foamed polyurethane that elastically abuts against the cylinder to limit the excessive contraction displacement of the shock absorber when jumping, the large-diameter fitting portion (60) at the upper end and the axial compression The portion between the deformable ring-shaped narrowing portion (48), and the insertion portion (80) in the state of being inserted into the concave fitting portion (44) of the spring seat (42) in the state of compression deformation when the vehicle jumps On the outer peripheral surface, a diameter reduction inducing portion (82) is provided, which has a substantially inverted tapered shape whose outer diameter gradually decreases toward the upper side, and induces a diameter reduction deformation accompanied by compression deformation, and at least at the insertion portion An annular gap for diameter-reducing deformation is formed between the inner peripheral surface (72) of the center hole (47) of (80) and the piston rod.

Description

technical field [0001] The present invention relates to a shock stopper (boundstopper) made of tubular foamed polyurethane used in a vehicle suspension device including a shock absorber and a coil spring as structural elements, and particularly relates to a shock stopper characterized in that it is used to prevent abnormalities. The technical means of sound is the shock limiter. Background technique [0002] Conventionally, in a vehicle suspension device including a shock absorber and a coil spring as structural elements, a shock limiter that contacts the cylinder of the shock absorber when the vehicle bounces and controls the excessive contraction displacement of the shock absorber is used. Bit device. [0003] For example, Patent Document 1 below describes a shock stopper. [0004] This shock stopper has a rubber shock stopper and a foam polyurethane shock stopper. In particular, when the impact stopper is made of the latter foamed polyurethane, it has a higher compress...

AI Technical Summary

Problems solved by technology

[0009] The spring seat is an important protective part on the vehicle. Because it requires rust resistance, cationic coating is applied on the surface, and the surface becomes a "smooth" smooth surface. Therefore, the impact stopper acts as a stopper. During compression and deformation, friction occurs against the spring seat, specifically, against the inner peripheral surface of the inverted cup-shaped concave fitting portion, so there is a problem that abnormal sound consisting of stick slip sound is likely to be generated.

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