Pull Training Device

Abstract

A pull training device is provided, including a pull grip, a cable having an end connected to the pull grip and a power module connected with the other end of the cable and can pull the cable. The power module includes a power input unit and a power output unit. The power input unit includes a motor and a cylinder combined with the motor in a torsional manner. The power output unit includes a rotating wheel and a winding shaft. The motor is connected to the rotating shaft of the rotating wheel. The cylinder is connected to spokes of the rotating wheel. The winding shaft is coaxial with the rotating shaft. The cable is coiled on the winding shaft. In a rotation circle of the rotating wheel driven by a pull, the torsion formed by the cylinder and motor together changes periodically, so the pull provided for training muscles is not a single source. The pull changes regularly in a circle, thus the muscles are trained a quick contraction and relaxation mode.

What is claimed is: 
     
         1 . A pull training device, comprising a pull grip, a cable having an end connected to the pull grip and a power module which is connected with the other end of the cable and can pull the cable, characterized in that: the power module includes a power input unit and a power output unit; the power input unit includes a motor and a cylinder combined with the motor in a torsional manner; the power output unit includes a rotating wheel and a winding shaft; the motor is connected to the rotating shaft of the rotating wheel; the cylinder is connected to spokes of the rotating wheel; the winding shaft is coaxial with the rotating shaft; and the cable is coiled on the winding shaft; wherein, the motor provides the input unit with a constant driving force, while the cylinder provides the input unit with a driving force that changes periodically. 
     
     
         2 . A pull training device according to  claim 1 , characterized in that the cylinder has a piston moving up and down; the piston has a rotational rigid link rod; one end of the link rod is rotationally connected to the piston, while the other end is fixed at the spokes of the rotating wheel. 
     
     
         3 . A pull training device, comprising a pull grip, a cable having an end connected to the pull grip and a power module which is connected with the other end of the cable and can pull the cable, characterized in that the power module includes a power input unit and a power output unit; the power input unit includes a motor, a cylinder combined with the motor in a torsional manner and a first rotating wheel; the motor is connected to the rotating shaft of the first rotating wheel; the cylinder is connected to the spokes of the first rotating wheel; the power output unit includes a second rotating wheel and a winding shaft; the winding shaft is coaxial with the second rotating shaft; the cable is coiled on the winding shaft; the first rotating wheel and the second rotating wheel transmit rotation there-between through a transmission belt. 
     
     
         4 . A pull training device according to  claim 3 , characterized in that the transmission belt is a V-shape transmission belt. The first rotating wheel and the second rotating wheel have a V-shaped belt trough. 
     
     
         5 . A pull training device according to  claim 3 , characterized in that the cylinder has a piston moving up and down; the piston has a rotational rigid link rod; one end of the link rod is rotationally connected to the piston, while the other end is fixed at the spokes of the first rotating wheel. 
     
     
         6 . A method for generating combined torsion in the pull training device according to  claim 3 , characterized in that the power input unit is driven by the motor and the cylinder at the same time, the motor drives the power input unit by a rotating driving force at a constant speed, while the cylinder drives the power input unit by a periodically changing force. 
     
     
         7 . A pull training device, comprising a pull grip, a cable having an end connected to the pull grip and a power module, characterized in that the power module is connected with the other end of the cable and drives the cable; the power module includes a power input unit and a power output unit; the power input unit includes a first rotating wheel, a motor, and a cylinder combined with the motor in a torsional manner; the motor is connected to the rotating shaft of the first rotating wheel; the cylinder is connected to the spokes of the rotating wheel; the power output unit includes a second rotating wheel and a winding shaft; the winding shaft is coaxial with the second rotating shaft; the cable is coiled on the winding shaft; the first rotating wheel and the second rotating wheel transmit rotation there-between through a transmission belt; the motor drives the rotating shaft of the first rotating wheel at a constant rotating speed, while the cylinder drives the spokes of the first rotating wheel by a periodically changing force.