Bidirectional speed limited safety pliers for elevator

The utility model relates to a bidirectional speed limited safety plier for an elevator which is matched with a guide way of the elevator, comprising a plier seat. The upper part and the lower part inside the plier seat are basically symmetrical and are provided with a descending overspeed braking device and an ascending overspeed braking device. The descending overspeed braking device is hinged with a swivel arm of a lifting mechanism of a the overspeed governor by a pinned plate; the pinned plate is connected with an upper pressing plate and a descending compression spring. The ascending overspeed braking device is hinged with a rotary arm of the lifting mechanism of the overspeed governor by a draw rod; the draw rod is fixed on a lower pressing plate and an ascending compression spring by screws. The upper and the lower pressing plates are connected with a pair of movable wedge which are arranged on two sides of the guide way of an elevator car. A corresponding fixed wedge block is contacted and connected with the movable wedge; a disk type spring is arranged between the fixed wedge block and the plier seat. The utility model is served as a safety apparatus for the elevator; the bidirectional speed limited safety plier for an elevator can act and make the elevator car stop in order to effectively prevent error action when the elevator is overspeed during descending and ascending. The bidirectional speed limited safety plier for an elevator has the advantages of compact structure, small size and light weight.