Telescopic Machine Core

A telescopic machine core comprises a shell (1), a sliding wheel disc (2) and a bracket (3), which is characterized in that the top of the shell (1) is bolted with a motor (4), the output shaft of the motor (4) is connected with a reciprocating screw rod (5) through the coupling, two symmetrical spiral grooves (6) are arranged on the reciprocating screw rod (5), the inner cavity of the spiral groove (6) is slidably connected with a driving block (7), the spiral groove (6) of the reciprocating screw rod (5) drives the sliding wheel disc (2) through the driving block (7), the top of the reciprocating screw rod (5) penetrates through the bracket (3) and is connected with two eccentric wheels (10) by key connection, both sides of the top of the bracket (3) are integrally formed with a fixing bracket (11), the opposite side of the fixing bracket (11) is rotatably connected with the head supporting shaft, and the top of the head supporting shaft is in contact with a vibrating head (12), the bottom of the vibrating head (12) is provided with the guiding groove matched with the eccentric wheels (10).