Method for designing spacer bush of rod end spherical hinge

Abstract

The invention relates to the field of damping of elastic rubber parts, and particularly relates to a method for designing a spacer bush of a rod end spherical hinge. The rod end spherical hinge comprises an outer sleeve, a mandrel and a rubber layer, the spacer bush is arranged in the rubber layer, the spacer bush is provided with a spacer bush upper side surface, a spacer bush lower side surface and a spacer bush end surface, one end of the spacer bush end surface is connected with the spacer bush upper side surface, the other end, opposite to the upper side surface of the spacer bush, of the spacer bush end surface is connected with the spacer bush lower side surface, a tip B1 is formed between the spacer bush end surface and the spacer bush upper side surface, the tip B1 between the spacer bush upper side surface and the spacer bush end surface is in point contact with a mold, the spacer bush is axially located in the vulcanization process by adopting point contact between the tip B1 and the mold, and the requirement on the tolerance of the spacer bush is reduced.

Description

technical field [0001] The invention relates to a design method for a spacer sleeve of a rod-end ball joint, and belongs to the technical field of shock absorption of elastic rubber parts. Background technique [0002] The rod end ball joint is an important shock-absorbing connection element, which is mostly used in trains, high-speed rail, automobiles, ships or airplanes. When the body is subjected to complex load conditions such as radial, torsion and deflection, the deformation of the rod end ball joint is used to bear Deviated torsion angle and radial load to prevent the body from rolling over during operation. The current rod end ball joint generally adopts a single-layer rubber joint form of a metal jacket-single-layer rubber layer-metal inner sleeve or a pure metal joint form; the radial stiffness of the single-layer rubber joint is small, and can only bear small radial loads. The anti-bias torsional load capacity is poor. Because the rubber layer is an integral stru...

AI Technical Summary

Problems solved by technology

[0004] 1. The end face of the spacer is a conventional structure. Due to space constraints, the thickness of the spacer in the multi-layer rubber structure is usually very small, which makes the spacer easily deformed and difficult to position stably in the mold, which makes the distribution of the spacers in the finished product uneven. Average, affecting fatigue resistance, product life cannot be guaranteed

[0005] 2. With the existing design, when the radial load is large, due to the problem of the force angle, the product is still prone to poor fatigue resistance and product damage.

[0006] In view of the problem that the spacer is difficult to be positioned stably in the mold, in the prior art, the end of the spacer is usually set as figure 1 In the form of the rectangular end C on the right side of the dotted line D, the upper end face 7, the lower end face 10 and the side end face 8 of the rectangular end C are used for surface contact positioning with the mold between the end of the spacer and the mold. This method requires very high precision between the mold and the metal spacer, the tolerance of the spacer is poor, and the product cost is high

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