Three-station mechanism

Abstract

The invention discloses a three-station mechanism, which comprises a support frame, wherein two transmission devices are arranged on the support frame, each transmission device comprises a transmission shaft which is rotatably arranged on the support frame, a first swing arm, a second swing arm, a third swing arm and a fourth swing arm are arranged on the transmission shaft, the first swing arm isfixed on the transmission shaft, the second swing arm, the third swing arm and the fourth swing arm rotatably sleeves the transmission shaft, the second swing arm is connected with the fourth swing arm through a connecting rod, the first swing arm and the third swing arm are both provided with notches, the connecting rod is positioned in the notches, the support frame is also rotatably provided with an opening and closing gate shaft, the fourth swing arm is connected with the opening and closing gate shaft through a locking plate rotatably arranged on the support frame, the third swing arm ishinged with one end of a push-pull rod, the other end of the push-pull rod is hinged with the opening and closing gate shaft, and a punch spring is hinged between the second swing arms in two transmission devices. The invention aims to provide the three-station mechanism which is convenient to install and does not cause switching failure.

Description

technical field [0001] The invention relates to an electric device, in particular to a three-position mechanism for isolation and load switch. Background technique [0002] The isolation mechanism and grounding mechanism of the switch on the market generally use two or one overshoot spring and one main shaft to complete the closing and opening operations. The advantage of its mechanism is that the structure is simple, but the corresponding disadvantage is that the overshoot spring is generally installed on the shell or bracket, which is inconvenient to install and not beautiful. The main problem is that the opening and closing failure will occur; there is also a A more common isolation mechanism is the coil spring mechanism, which is slightly larger and more expensive. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a three-station mechanism which is easy to install and does not fail to open and close. [0004]...

AI Technical Summary

Problems solved by technology

The advantage of its mechanism is that the structure is simple, but the corresponding disadvantage is that the overshoot spring is generally installed on the shell or bracket, which is inconvenient to install and not beautiful. The main problem is that the opening and closing failure will occur; there is also a A more common isolation mechanism is the coil spring mechanism, which is slightly larger and more expensive

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