Rat preventer for power transmission and transformation

The utility model discloses a ratproof device for power transmission and transformation. The ratproof device comprises an arc-shaped shell, a first circular shell and a locking unit. The arc-shaped shell is a hard plastic arc-shaped shell; a second circular shell is hinged to the left side of the upper end of the outer arc face of the first circular shell through a hinge, and notches symmetrically formed in the lower end face of the second circular shell and notches symmetrically formed in the upper end face of the first circular shell are slidably connected with arc-shaped sliding grooves correspondingly formed in the front and rear ends of the outer arc face of the arc-shaped shell through arc-shaped sliding strips; the locking unit comprises an L-shaped fixing plate, a counterbore, a fixing block and a countersunk locking screw, the L-shaped fixing plate is arranged on the right side of the upper end of the inner cambered surface of the first circular shell, a counterbore is formed in the right side of the