Hole pitch-adjustable crank arm structure

The utility model relates to the technical field of disconnecting switches, and discloses a pitch-adjustable crank arm structure, which comprises a disconnecting switch, a fixed block and a sliding block, the upper surface of the disconnecting switch is fixedly connected with the bottom surface of the fixed block, the sliding block is connected inside the fixed block in a sliding manner, the bottom surface of the sliding block is contacted with the upper surface of the disconnecting switch, and the upper surface of the disconnecting switch is connected with the fixed block. Two positioning holes are formed in the front face of the sliding block, a positioning bolt is in threaded connection with the interior of each positioning hole, and the end, away from the sliding block, of each positioning bolt penetrates through the corresponding positioning hole and extends to the back face of the fixing block; according to the utility model, the isolation switch, the fixing block, the sliding block, the positioning hol