Device for milling inner clamp spring groove in transmission shaft accessory

The device comprises a fixed seat and a base, a plurality of fixing clamps used for locking the accessory are arranged on the upper portion of the base, each fixing clamp comprises a support located on the left side and the right side of the accessory and fixedly arranged on the base, and a sliding groove penetrating through the support is formed in the middle of the support; a sliding block sliding up and down is arranged in the sliding groove. The oil cylinder penetrates through the sliding block and slides along with the sliding block, and the action end of the oil cylinder is used for stretching into the lug holes in the two sides of the accessory and being connected with the accessory in a clamped mode; the pressing pieces are located on the front side and the rear side of the accessory and comprise the first pressing piece and the second pressing piece, and the rotated first pressing piece and the rotated second pressing piece are used for pressing the front side and the rear side of the accessory corre