The self propelled wake - - vehicle clearing snow

摘要

The self propelled wake - - clearing snow vehicle, comprising:a drive chassis (12; 221), which is connected to the drive wheels (231, 23r; 222l, 222r) for driving the wake - - vehicle clearing snow is provided;a vehicle frame (15; 230), which at its front end section with a worm (31; 231) is provided for the removal of snow, wherein the vehicle frame is connected pivotably to the drive chassis;a frame lift mechanism (16; 233l, 233r), the front end portion of the vehicle frame (15; 230) relative to the drive chassis (12; 221) to lift up and down, the frame lifting mechanism of an electrohydraulic cylinder actuator (16; 233l, comprises 233r) with a piston rod (82; 234l, 234r) and an electric motor (85), which is driven in rotation, in order to provide a fluid pressure - for a back and forth movement of the piston rod between a fully retracted position and a fully extended position to produce;an operating switch (100), which is adapted to be actuated manually, in order to the electric motor (85) in both directions; as well as a control unit (28; 245) for a control operation of the electric motor (85), thereby obtaining an operation of the frame lift mechanism (16; 233l, to control 233r),wherein the control unit (28) is provided for this purpose, the electric motor (85) then forcibly if a predetermined time has elapsed after the control switch (100) has been activated, wherein the predetermined period of time equal to an operating time of the cylinder actuator (16), which is required, in order to the piston rod (82), by means of a maximum stroke of - or retract, which between the fully extended position and the fully retracted position is defined.