Improved pressure accumulator of gearbox

The utility model relates to an improved pressure accumulator of a gearbox. The pressure accumulator comprises a tank body, a piston and a bottom cover, a pre-inflating device is arranged at the top end of the tank body, the piston is arranged in the tank body, and a limiting device for preventing the piston from being separated from the bottom of the tank body is mounted on the piston; the bottom end of the tank body is detachably connected with the bottom cover, and an oil way connector is arranged on the bottom cover and used for being communicated with a gearbox hydraulic oil way. According to the pressure accumulator, faults caused by breakage of the valve plate of the electromechanical control unit can be prevented, when faults occur, the damaged electromechanical control unit can be repaired without dismantling the valve plate, lossless repair can be achieved, computer matching is not needed after installation, time and labor are saved, cost is low, and the effect can be achieved once and for all. 本实用新