Microcomputer rotary position-limiting and speed-limiting combination switch

• Main Author: LIU ZEZHOU
• Format: Patent
• Language: Chinese; English
• Published: 11.11.2009
• Subjects: CRANES; HAULING; HOISTING; LIFTING; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES; PERFORMING OPERATIONS; TRANSPORTING

The utility model discloses a microcomputer rotary position-limiting and speed-limiting combination switch, which has the advantages of simple structure, small size, accurate control and real-time display of the accurate value of a rotating speed. The combination switch is provided with a rotary position-limiting mechanical switch which is arranged beside a winding drum shaft of a crane, a rotary disc which is arranged on the winding drum shaft of the crane, and a digital quantity speed-measuring sensor which is arranged to be corresponding to the rotary disc; the output of the digital quantity speed-measuring sensor is connected with a proportional operation amplifier; and the output of the proportional operation amplifier is connected with a display circuit and an over speed control execution circuit.