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Pull rod joint design method

A design method and node technology, applied in railway car body parts, bogies, transportation and packaging, etc., to achieve the effect of improving reliability and avoiding fatigue cracking

Active Publication Date: 2020-12-04
ZHUZHOU TIMES RUIWEI ANTI VIBERATION EQUIP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The above-mentioned patent does not involve: how to ensure the high reliability of the tie-rod node and the design method of the tie-rod node that satisfies the stability of the rail vehicle operation at the same time

Method used

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  • Pull rod joint design method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1 as Figures 5 to 7 As shown: when the stiffness K of the tie rod node is less than or equal to the maximum stiffness Km of the rubber layer, the tie rod node adopts the linear stiffness design scheme of Embodiment 1. The tie rod node includes: a cylindrical mandrel 1, a circular rubber layer 2 and a circular outer jacket 3, the rubber layer 2 is pressed into the space between the mandrel 1 and the outer jacket 3 through a press-fitting device, or it can be vulcanized It is connected with the mandrel 1 and the jacket 3 as a whole.

[0052] Then the overcoat 3 can also be radially compressed by the pressing equipment, and then the rubber layer 2 can be compressed by compressing the overcoat 3 to increase the density of the rubber layer 2, thereby increasing the stiffness K1 of the rubber layer 2, so as to improve the rubber layer 2. Carrying capacity.

Embodiment 2

[0053] Example 2 as Figures 8 to 10 As shown: when the stiffness K of the tie rod node is less than or equal to the maximum stiffness Km of the rubber layer, the tie rod node can also adopt the linear stiffness design scheme of Embodiment 2. The tie rod node includes: a cylindrical mandrel 1 , an arc-shaped rubber layer 2 and an annular casing 3 , and a cavity 6 along the axial direction of the tie rod node is also provided between the mandrel 1 and the outer casing 3 . The rubber layer 2 is arranged between the mandrel 1 and the casing 3 by pressing or vulcanizing.

[0054] The difference from Example 1 is that in Example 2, the rubber layer 2 does not fill the annular space between the mandrel 1 and the jacket 3 , and an axial cavity 6 is provided between the mandrel 1 and the jacket 3 . The tie-rod nodes have greater rigidity in the direction where the rubber layer 2 is arranged, and the tie-rod nodes have smaller stiffness in the direction where the cavity 6 is arranged....

Embodiment 3

[0055] Example 3 as Figures 11 to 13 As shown: when the stiffness K of the tie rod node is greater than the maximum stiffness Km of the rubber layer, the tie rod node adopts the non-linear variable stiffness design scheme of Embodiment 3.

[0056] The tie rod node with variable stiffness design includes: a mandrel 1, a rubber layer 2, an outer jacket 3 and an inner stopper 4. The rubber layer 2 is pressed into the space between the mandrel 1 and the outer jacket 3 through a press-fitting device, or it can be vulcanized The method is connected with the mandrel 1 and the overcoat 3 as a whole. Then the overcoat 3 can also be radially compressed by the pressing equipment, and then the rubber layer 2 can be compressed by compressing the overcoat 3 to increase the density of the rubber layer 2, thereby increasing the stiffness K1 of the rubber layer 2, so as to improve the rubber layer 2. Carrying capacity.

[0057] The rubber layer 2 is provided with a cavity 6 along the axial ...

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Abstract

The invention relates to a pull rod joint design method. The method comprises the steps that the pull rod joint rigidity requirement of a user is compared with the maximum rigidity of a rubber layer;and linear stiffness design or variable stiffness design is adopted for pull rod nodes according to the comparison result. Variable stiffness design is achieved in the mode that the inner backstop isarranged between a mandrel and an outer sleeve. An inner backstop and a rubber layer are used for bearing fatigue load together so as to control the fatigue load borne by the rubber layer and the strain of the rubber layer, fatigue cracking caused by overlarge strain of the rubber layer is avoided, and the reliability of the traction joint is improved.

Description

technical field [0001] The invention relates to the field of rail vehicle accessories, in particular to a design method for tie rod nodes. Background technique [0002] The traction rod node is an important part of the rail vehicle. It is installed at both ends of the bogie draw rod. One end is connected to the car body and the other end is fixed to the bogie. Tie rod nodes need to provide elastic effects such as torsional deformation and deflection deformation. The traction link nodes work together with air springs and other rubber components to provide stable and comfortable running performance for the car body. Its main function is to transmit traction and braking force. If the product stiffness is too high, it will affect the shock absorption and buffering effect and affect the comfort of passengers. If the product rigidity is too small, it will affect the service life of the product. Failure of the drawbar joints can result in drawbar failure, traction and braking sh...

Claims

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Application Information

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IPC IPC(8): B61F5/50
CPCB61F5/50
Inventor 陈俊辉李涛冯万盛邓梦君李静曾先会罗俊黄涛
Owner ZHUZHOU TIMES RUIWEI ANTI VIBERATION EQUIP LTD