Hydraulic driver for mechanical arm joint

The utility model relates to a mechanical arm joint hydraulic driver, which belongs to the field of robot equipment and comprises a main body frame, a rotating drum is arranged on the upper surface of the main body frame, and a first support arm is hinged to the upper surface of the rotating drum; the beneficial effects of the utility model are that through the work of the hydraulic pump, the hydraulic pump injects hydraulic oil into the left side of the first hydraulic cylinder through the oil nozzle at the left side, and pushes the piston rod to protrude rightwards, so that the first support arm rotates anticlockwise, and similarly, through the extension of the telescopic end of the second hydraulic cylinder, the second support arm rotates anticlockwise; the flow of hydraulic oil entering the first hydraulic cylinder can be controlled through the proportional valve, and when the operation end of the mechanical arm is close to a designated place, the proportional valve reduces the flow, so that the oil cylin