A ejector rod and a tripping device and an operating mechanism using the ejector rod

Abstract

The invention discloses a push rod and a releasing device using the same and an operation mechanism. The push rod has more than two segments which are successively and serially connected along the rod length in a mobile manner; the contrary ends of the two segments on the two ends of each segment along the rod length are input end which is pressed by an operation swinging arm and an output end for pressing a releasing swinging arm; and an elastic member is installed between adjacent two segments and is capable of stretching out and drawing back along the rod length direction. Through the above arrangement, the releasing swinging arm is swung in the place after a grapping element is released from a corresponding half shaft; at this time, the operation swinging arm, the push rod and the releasing swinging arm maintain relative standstill, so that all the segments of the push rod relatively compress the elastic member in order to absorb the pressure power applied the on the push rod through elastic deformation of the elastic member when torque is continually applied on the operation swinging arm because of the misoperation and inappropriate operation, which reduces the pressure power transmitted from the push rod to the swinging arm and reduces the mechanic damage caused by the over releasing acting among the structures of releasing operation.

Description

technical field [0001] The invention relates to a push rod, a tripping device and an operating mechanism using the push rod. Background technique [0002] At present, the vacuum circuit breakers used for voltage levels below 40.5KV are still mainly spring operating mechanisms. The spring operating mechanism not only has complete electric functions, but also its manual closing and opening functions must meet the relevant national standards. For example, the "manual opening and closing device of the operating mechanism" disclosed in the Chinese patent document CN 102592859 A (announcement date is August 20, 2014), includes the frame and the manual tripping device assembled on it, and the manual tripping device includes control The closing and tripping arm of the closing detent, the opening and tripping arm of the opening detent, and the pressing and closing tripping arm deviate from the other one at the same time. The swing arm is rotated and assembled on the frame through t...

AI Technical Summary

Problems solved by technology

However, during the process of triggering the opening and closing actions, the pressure force is transmitted sequentially through the rigid parts between the operating swing arm, ejector rod and tripping swing arm, so after the detent has been tripped on the corresponding half shaft, If you continue to apply the tripping torque on the manual operation shaft, the operating swing arm will continue to press the corresponding tripping swing arm through the ejector rod, and the operating swing arm, ejector rod and tripping swing arm are all exquisite in structure but strong. Relatively limited structural parts, these structural parts are prone to mechanical damage such as bending deformation, bending, or even breaking if they are continuously pressed when they are stopped relative to the frame, resulting in unreliable actions for the next tripping action , and even the problem of not being able to trip

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