The invention discloses an elevator over travel prevention triple protection device mounted between a car and a hoistway. The device comprises a guide wheel mounted above the top of the hoistway and a terminal limit switch, wherein the guide wheel is wound with a steel wire rope; a counterweight block is arranged at one end of the steel wire rope, and the other end is connected with the car; a guide rail is arranged in the vertical horizontal plane direction of the inner wall of the hoistway; a limit switch upper touch wheel, an upper limit switch and an upper forced speed reducing switch are arranged at the upper part of the guide rail in sequence from top to bottom; an upper switch beating plate fitting the limit switch upper touch wheel, the upper limit switch and the upper forced speed reducing switch is arranged above the car; a lower forced speed reducing switch, a lower limit switch and a limit switch lower touch wheel are arranged at the lower part of the guide rail in sequence from top to bottom; and a lower switch beating plate fitting the lower forced speed reducing switch, the lower limit switch and the limit switch lower touch wheel is arranged below the car. The forced speed reducing switches, the limit switches and the limit switches are formed to three barriers of preventing the over travel of an elevator so as to prevent the over travel causing faults in the operation.
Elevator over travel prevention triple protection device
2015-10-21
Patent
Elektronische Ressource
Englisch
IPC: | B66B Aufzüge , ELEVATORS |
Elevator car movement prevention protection mechanism
Europäisches Patentamt | 2020
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