AUTOMATIC DEVICE FOR RELEASING PARKING BRAKE OF CONSTRUCTION HEAVY EQUIPMENT

摘要

PURPOSE: An automatic device is provided to release the parking brake after passing the regular time when a driver operates a switch for selecting a forward movement and a rearward movement in a state of cutting a switch for releasing the parking brake. CONSTITUTION: An automatic device for releasing a parking brake electrically connects a forward and rearward solenoid valve(3) and a battery(B+) without a short cut. The device opens a traveling pressure switch(14) between a circuit branching off from the select mode for the forward movement and the rearward movement of the solenoid valve and a circuit branching off between a switch(5) for releasing the parking brake and a parking brake solenoid valve(6). When the traveling pressure switch is selectively operated, the parking brake is released by electrically connecting the parking brake solenoid valve.