Speed sensor shell used on main traction motor of bullet train

The utility model provides a speed sensor housing used on a main traction motor of a motor train unit, and belongs to the technical field of speed sensors. The speed sensor shell for the main traction motor of the bullet train comprises a mounting seat, a protective shell is arranged at the bottom of the mounting seat, a speed sensor is fixedly mounted between the mounting seat and the protective shell, the mounting seat comprises a mounting seat body, and connecting clamping blocks are fixedly mounted on the two sides of the mounting seat body. The protective shell comprises a protective shell body, limiting sliding grooves are formed in the two sides of the protective shell body, sliding clamping blocks are slidably connected to the limiting sliding grooves, screw holes are formed in the tops of one ends of the limiting sliding grooves, screw rods are in threaded connection with the interiors of the screw holes, the screw rods penetrate through the sliding clamping blocks, and rotary knobs are fixedly insta