Hydraulische Hubvorrichtung über drehbetriebene Flurförderzeuge

摘要

The lifting apparatus consists of at least one hydraulic cylinder, providing a lifting function, which converts the potential energy, gained in lifting, into hydraulic power for secondary functions as well as recharging the batteries. A DC motor (10) drives an hydraulic pump (12) which supplies hydraulic fluid from the tank (14) to the lifting cylinder (20), via a control valve system (18). When the cylinder falls the hydraulic fluid is returned through the pipe (28) to a point between the pump (12) and a non-return valve (16), causing the pump (12) to act as an hydraulic motor, and the motor (10) as a generator, charging the supply battery. The hydraulic pressure may also be returned through the valve system (18) to operate other hydraulic functions (22).