Electric speed limiter without machine room

The utility model relates to an electric speed limiter without a machine room, which is used for limiting the speed of an elevator without a machine room so as to ensure the safety of the elevator operation, and the utility model is an improved design on the base of an original one-way speed limiter. The utility model comprises a rope pulley component arranged on a machine frame, a ratchet wheel ratchet pawl gearing, a switching device, an electromagnet, a triggering plate hinged on the machine frame and a box-shaped plate. A switching top plate is fixed on a ratchet wheel and is in contact with and is connected with a switching contact, a slope of the upper part of the triggering plate is connected with a shaft pin of the head of a ratchet pawl, a touch block of the triggering plate is in contact with and is connected with the electromagnet, a draw rod of the box-shaped plate component is hinged with the ratchet wheel, and the box-shaped plate component has a brake scotch. The utility model not only maintains the advantages of stable speed, flexible action, small volume, compact structure, convenient installation and convenient debugging of the original one-way speed limiter, but also realizes the electric restoration outside a hoistway in an electrical control mode and the utility model makes the speed limiter happen mechanical action. When moving at an overspeed in the ascending direction and the descending direction, the elevator can be respectively switched off and stopped only by one switch. The rated speed scope of the utility model is wide, and the rated speed from 0.5m/s to 2.5m/s can be used.