Z axis power assisting system of rectangular coordinate robot

The invention belongs to the technical field of handling equipment, and discloses a Z axis power assisting system of a rectangular coordinate robot. The system is connected with a Y axis support through a Y axis linear guide rail pair; a Z axis lifting lift car is connected with a Z axis supporting seat through two groups of double linear guide rail pairs, and the lower end face of the Z axis lifting lift car is connected with a robot clamping mechanism through screws; a Z axis lifting servo motor is fixed on one side face of the Z axis supporting seat through screws, and racks of a rack-and-pinion are fixed on one side face of the lifting lift car through screws; and a Z axis power assisting cylinder is connected with the Z axis supporting seat through a hinged supporting seat and threaded connection, a cylinder piston rod head is connected with the lifting lift car through a rod end knuckle bearing, and a power assisting system pneumatic control panel is fixed on the upper end face of the Z axis supporting