Double-layer rubber spring and air spring using double-layer rubber spring

Abstract

The invention provides a double-layer rubber spring and an air spring using the double-layer rubber spring, and belongs to the field of air springs. The double-layer rubber spring comprises an upper-layer outer sleeve, an upper-layer partition plate, an upper-layer core shaft, an upper-layer rubber, a lower-layer outer sleeve, a lower-layer partition plate, a lower-layer core shaft and a lower-layer rubber, a limiting ring is arranged at the upper end of the lower-layer separation plate, the limiting ring can contain the lower end of the upper-layer partition plate, a circle of boss is arranged on the outer side of the lower-layer outer sleeve, a circle of groove is formed in the outer side of the upper-layer outer sleeve, a boss of the lower-layer outer sleeve can be contained in the groove of the upper-layer outer sleeve, a circle of boss is arranged on the outer side of the lower core shaft, a circle of groove is formed in the outer side of the upper core shaft, a groove of the upper-layer core shaft can contain a boss of the lower-layer core shaft, a circle of gap interval with an oval cross section is arranged between the upper-layer rubber and the lower-layer rubber, the upper rubber is made of natural rubber, and the lower rubber adopts modified chloroprene rubber. The double-layer rubber spring has the beneficial effects that the requirement of the air spring for stress is met, the requirement for the fireproof performance of the EN45545 by the air spring is met, and the installation and the maintenance are convenient.

Description

technical field [0001] The invention belongs to the field of air springs, and in particular relates to a double-layer rubber spring and an air spring using a double-layer rubber spring. Background technique [0002] Rail vehicles have a large passenger flow, most of the lines are in relatively confined spaces, and they are crowded places with disorderly people. It is difficult to escape and rescue in the event of a disaster. In recent years, there have been many train fire accidents, resulting in many casualties and serious property losses. Therefore, countries all over the world have continuously put forward higher prevention standards for potential fire safety hazards that may occur in rail transit vehicles. [0003] For the fire test standards of railway vehicle materials, the test standards and methods are different in various countries. The European Union has launched a plan called Firestarr Project (Fiestal Project), which aims to research and establish a set of flamma...

AI Technical Summary

Problems solved by technology

According to the current fire protection requirements of EN45545, it is difficult for the rubber materials used to meet the mechanical properties and fire performance of conical rubber springs at the same time

[0006] Chinese patent CN204488810 discloses an air spring for urban express passenger car bogie. This utility model provides an air spring using a conical rubber spring, which effectively solves the problem of frame stress concentration, but the conical rubber spring in the patent Once the rubber is damaged, the entire conical spring needs to be replaced, and this utility model cannot solve the problem of fire resistance of the air spring. At present, there is a lack of rubber materials with high fire resistance and high mechanical properties on the market

[0007] Chinese patent CN207997867 discloses an air spring, a bogie equipped with the air spring, and a rail vehicle. This utility model provides an air spring that uses flat rubber and conical rubber in series, which effectively reduces the stiffness of the rubber spring and satisfies the The stiffness requirements of the air spring in the case of air loss, but this patent also does not solve the defects of the air spring in terms of fire resistance

[0008] The patent with the publication number CN105987117 discloses an air spring with a fireproof cover. This invention mainly achieves fire protection by installing an additional fireproof cover on the outside of the air spring using a conical rubber spring and filling the fireproof cover with inert gas. Purpose, although this patent provides an air spring with improved fireproof performance, installing a fireproof cover on the outside of the air spring means increasing the volume of the air spring, and secondly, it is necessary to set an air inlet and an air outlet filled with inert gas. The invention increases the volume of the air spring and needs to increase the inert gas charging and discharging port, which causes great problems for the installation, maintenance and disassembly of the air spring

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