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Low-ovality center pin bush capable of meeting bidirectional variable stiffness requirement

A technology of variable stiffness and ellipticity, which is applied in the field of rail vehicle shock-absorbing parts manufacturing, can solve problems such as unfavorable product installation, inability to achieve variable stiffness, low torsional stiffness, etc., to ensure service life, high load-carrying capacity, and reduce ellipticity Effect

Pending Publication Date: 2022-05-06
ZHUZHOU TIMES RUIWEI ANTI VIBERATION EQUIP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The utility model has a simple structure, and has different radial stiffness when bearing radial loads in different directions, and variable stiffness can be realized in the longitudinal direction, so as to reduce the influence of the longitudinal impact of the bogie on the center pin when the vehicle starts and brakes; Low torsional rigidity meets the requirement that when the vehicle curve is too small, the internal connection parts of the central traction device will not be relatively loose. However, this patent can only realize variable stiffness in the longitudinal direction of the track, and cannot achieve variable stiffness in the lateral direction of the track. The bearing capacity is low. And it is not conducive to the installation of the product

Method used

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  • Low-ovality center pin bush capable of meeting bidirectional variable stiffness requirement
  • Low-ovality center pin bush capable of meeting bidirectional variable stiffness requirement
  • Low-ovality center pin bush capable of meeting bidirectional variable stiffness requirement

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Experimental program
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Embodiment 1

[0031] The following is attached Figure 1-3 This embodiment will be further described in detail.

[0032] A low ellipticity central pin bushing that can achieve bidirectional variable stiffness requirements, such as figure 1 and figure 2 As shown, it includes an outer casing 1, a mandrel 2 and a rubber body 3 vulcanized between the outer casing 1 and the mandrel 2. The rubber body 3 is provided with a two-way air-to-rigidity unit located on the transverse M and the longitudinal N. The two-way air-to-space variable stiffness unit can reduce the torsional stiffness of the rubber body 3 in the transverse direction M and the longitudinal direction N, and realize the non-linear rigidity requirement of the rubber body in the transverse direction M and the longitudinal direction N. At the same time, in order to improve the radial Stiffness in the space direction, a hard stop 5 is provided in the rigidity variable unit in the space direction, and the hard stopper 5 is connected on...

Embodiment 2

[0042] The difference between this embodiment and Embodiment 1 is that, as Figure 4 As shown, the side wall of the deformation through hole 6 located on the rubber body 3 has a three-stage profile structure, specifically including arc wall one 9 and arc wall two 10 protruding toward the side away from the center line L3 of the deformation through hole 6, and the arc wall two 10. The arc wall three 11 is connected between the face wall one 9 and the arc wall two 10, and the arc wall three 11 protrudes towards the center line L3 side near the deformation through hole 6; the deformation can be increased by the arc wall one 9 and the arc wall two 10 The volume space of the hole 6 improves the deflection torsion ability of the center pin sleeve, and the radial stiffness of the rubber body 3 can be increased through the arc surface wall 3 11. The rubber profile of the three-stage combined structure can also avoid rubber accumulation and discount during the deformation process, and ...

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Abstract

The invention relates to the field of railway vehicle damping component manufacturing, in particular to a low-ovality center pin bush capable of meeting the bidirectional variable stiffness requirement, which comprises an outer sleeve, a mandrel and a rubber body vulcanized between the outer sleeve and the mandrel, and the rubber body is provided with empty variable stiffness units in the transverse M direction and the longitudinal N direction. A hard backstop which is connected to the outer wall of the inner sleeve and has a displacement gap with the inner wall of the outer sleeve is arranged in the null rigidity-variable unit; and the null rigidity-variable unit is uniformly divided into two through deformation through holes by the hard backstop. According to the center pin bush, nonlinear rigidity changing can be achieved in the transverse M direction and the longitudinal N direction, the ovality of the outer diameter of the center pin bush can be reduced, the shrinkage stress of rubber of the center pin bush in the whole circumferential direction is similar, and the requirement for deflection torsional rigidity can be met while the radial rigidity is met.

Description

technical field [0001] The invention relates to a low ellipticity central pin sleeve capable of realizing the requirement of variable stiffness in two directions, and belongs to the field of rail vehicle damping component manufacturing. Background technique [0002] As the center of rotation of the rail vehicle traction system, the center pin is one of the key components of the rail vehicle bogie, and is mainly used to transmit longitudinal and lateral forces. The center part of the center pin is matched with the traction center pin seat through the center pin sleeve, so the center pin sleeve is an important part connecting the center pin and the bogie. The center pin sleeve is usually composed of a metal inner sleeve, a metal outer sleeve and a middle rubber body. It is vulcanized, and the relative rotation between the car body and the bogie can be satisfied through the rubber deformation of the center pin sleeve, so as to improve the vibration performance of the vehicle an...

Claims

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Application Information

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IPC IPC(8): F16B19/02B61F5/50
CPCF16B19/02B61F5/50
Inventor 蒋仲三安然罗俊曾先会张玉祥陈俊辉李静
Owner ZHUZHOU TIMES RUIWEI ANTI VIBERATION EQUIP LTD