Vibration excitation force adjusting device

An excitation force adjusting device comprises a motor main shaft, a motor shell and two end covers fixed to the two axial ends of the motor shell in a one-to-one correspondence mode. The fixed eccentric block and the movable eccentric block are arranged in the end cover side by side; the adjusting nuts are in threaded connection with the two ends of the motor spindle, and the outer wall of each adjusting nut is integrally connected with a pull rod; one end of the axial inner side of the compression spring is propped against the spacer bush, and one end of the axial outer side of the compression spring is propped against the adjusting nut; a V-shaped opening is formed in one end of the axial inner side of the axial pressing block, and the end, facing the axial inner side, of the V-shaped opening is correspondingly matched with the first inclined planes of the two connecting parts; one end of the axial outer side of the axial pressing block abuts against the adjusting nut. According tothe exciting force adjust