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Mechanical self-locking device of TKH series change-over switch

A transfer switch and self-locking device technology, which is applied to locomotives and other directions, can solve problems such as air leakage from the working air pressure cylinder, transfer switch cannot maintain normal working status, and use is dangerous, so as to achieve the effect of improving reliability

Active Publication Date: 2014-03-26
CSR CHENGDU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the original design of the TKH series transfer switch has some shortcomings in the process of use: the transfer switch must maintain the normal pressure of the air cylinder to maintain the reliable switching state; once the electro-pneumatic valve fails, the working air pressure is too low, Air leakage and other problems, the transfer switch can not maintain normal working condition
This shortcoming will bring potential danger to the use of

Method used

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  • Mechanical self-locking device of TKH series change-over switch
  • Mechanical self-locking device of TKH series change-over switch
  • Mechanical self-locking device of TKH series change-over switch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: A mechanical self-locking device for a TKH series changeover switch, including a cylinder body 1 and a piston rod 5. The piston rod 5 is respectively provided with two sliders connected by a slider spring 2 at a distance from each other on the upper and lower sides of the piston rod 5. 3. Two static contacts 4 are respectively arranged on the upper and lower inner walls of the cylinder body 1 to correspond between two adjacent sliders 3 .

[0015] The sum of the length of the slider spring 2 when it is compressed by the gravity of the slider 3 , the length of the slider 3 and the length of the static contact 4 is greater than the distance between the inner wall of the cylinder body 1 and the surface of the piston rod 5 . Only such length setting can make the piston rod 5 move left and right, there is contact between the slider 3 and the static contact 4, and the effect of locking is played.

Embodiment 2

[0016] Embodiment 2: as figure 1 As shown, a TKH series transfer switch mechanical self-locking device includes a cylinder body 1 and a piston rod 5. The piston rod 5 is respectively provided with two sliders 3 connected by a slider spring 2 at a distance from each other on the upper and lower sides of the piston rod 5. , the upper and lower inner walls of the cylinder body 1 are respectively provided with two static contacts 4 corresponding between two adjacent sliders 3, the length of the slider spring 2 when it is compressed by the gravity of the slider 3, and the length of the slider 3 And the sum of the lengths of the static contact 4 is greater than the distance between the inner wall of the cylinder body 1 and the surface of the piston rod 5 .

[0017] The slider spring 2 is sleeved on a rod vertically and fixedly connected to the surface of the piston rod 5, and the slider 3 is movably sleeved on the upper part of the rod.

[0018] The end of the static contact 4 is r...

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Abstract

The invention discloses a mechanical self-locking device of a TKH series change-over switch, the mechanical self-locking device comprises a cylinder body and a piston rod, the upper and lower sides of the piston rod are respectively provided with two sliders which are connected by slider springs and are a distance apart, the upper and lower inner walls of the cylinder body are respectively provided with two static contacts corresponding between the two adjacent sliders, and the sum of the length of the slider spring compressed by the slider gravity, the length of the slider and the length of the static contact is greater than the distance between the cylinder body inner wall to the piston rod surface. The beneficial effects of the invention are that: mechanical self-locking and unlocking can be realized by friction; except the wind cylinder body and the piston rod, the change-over switch external dimension and other components may not be affected; under the condition of failures of a wind source and an electric pneumatic valve, the reliable operation of the TKH series change-over switch can be manually realized; and the normal operation reliability of the TKH series change-over switch can be improved.

Description

technical field [0001] The invention relates to the technical field of self-locking devices, in particular to a mechanical self-locking device of a TKH series transfer switch. Background technique [0002] TKH series transfer switches are used in the main circuit circuit of China Railway Shaoshan series electric locomotives. There are two main functions: one is to change the running direction of the locomotive; the other is to realize the conversion of the locomotive from traction to braking. The working principle of this series of transfer switches is to determine the transfer position of the transfer switch by controlling the on-off of the electric air valve on the transmission cylinder, and maintain this state. [0003] Although TKH series transfer switches are divided into TKH3, TKH4, TKH9 and other models, they are all derived from TKH3. However, the original design of the TKH series transfer switch has some shortcomings in the process of use: the transfer switch must ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61C17/00
Inventor 邬静远
Owner CSR CHENGDU
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