Energy-saving power-off locking brake

The utility model discloses an energy-saving power-off locking brake. The energy-saving power-off locking brake comprises a hydraulic block type brake and a locking mechanism. The locking mechanism comprises a rotating disc, a swing arm, a compression spring and a cam, the rotating disc is coaxially and fixedly installed on the center shaft, a notch is formed in the outer periphery of the rotating disc, the middle of the swing arm is rotatably installed on a supporting shaft, the two ends of the compression spring abut against the portion between the swing arm and a fixing body respectively, the cam is rotatably installed, and the cam is fixedly installed on the rotating disc. A protruding part is arranged on the outer periphery of the cam. According to the energy-saving type power-off locking brake, after the left brake arm and the right brake arm are opened, the left brake arm and the right brake arm are kept in the opened state through limiting of the swing arm, the pusher does not need to be powered on co