Engaging rubber joint and method of making the same

Abstract

The invention relates to an engaged rubber joint, which comprises a mandrel, an elastic rubber body and a metal sleeve, and the mandrel, the elastic rubber body and the metal sleeve are integrally vulcanized together. The engaged rubber joint is characterized in that upper projections and lower projections which are distributed along the circumferential direction of the mandrel and have the same shape and size are arranged on the wall of the mandrel, the upper projections and the lower projections are symmetrically arranged relative to the central axis of the mandrel, both the upper projections and the lower projections are evenly and separately distributed along the axial direction of the mandrel, the width of the upper projection along the radial direction of the mandrel is less than or equal to the diameter of the middle part of the mandrel, and the inner wall of the metal sleeve is provided with inner upper projections engaged with the upper projections and inner lower projections engaged with the lower projections. The ratio of the radial stiffness and axial stiffness of the engaged rubber joint disclosed by the invention is less than 5:1, moreover, the radial stiffness and axial stiffness adjustment range is wide, the whole rubber joint has two different torsional stiffnesses, and therefore the service life is longer. The invention also provides a fabrication method of the engaged rubber joint.

Description

technical field [0001] The invention relates to the technical field of damping components, in particular to rubber joints and a manufacturing method thereof, which are mainly used in rubber elastic components for various locomotive bogies, and are also suitable for vibration damping parts of engineering machinery. Background technique [0002] Rubber joint, also known as ball joint rubber, is a commonly used rubber-metal composite damping element, which can be widely used in various damping parts, especially in the bogies of rolling stock. The most common structure used in rubber joints is the three-piece structure (metal jacket + rubber + mandrel), and the performance of this structure basically meets the use of various working conditions. The disadvantage is that when the radial / axial direction of the rubber When the stiffness ratio is less than 5:1, this structure cannot meet the requirements. In recent years, with the advancement of technology, there have been serrated ...

AI Technical Summary

Problems solved by technology

[0003] The invention aims at the technical problem that the joint rubber in the prior art cannot meet the vibration damping requirements of the vibration damping part with a large range of radial stiffness and axial stiffness during use and has a short service life. The ratio of axial and axial stiffness is less than 5:1 and the adjustment range of radial and axial stiffness is large. The entire rubber joint has two different deflection stiffnesses and has a longer service life

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