Mainpump for mini excavator having regulator for minimum flow control system using auto idle pressure signal

摘要

The present invention is a small class with a minimum flow discharge regulator with auto idle signal relates to an excavator for the main pump, and an object thereof is provided with a minimum discharge flow rate regulator with a small consumption of the class excavator to prevent auto idle signal, and to minimize the unnecessary fuel by each of the swash plate from the idle state to enable small class Excavators are used to provide the main pump. In the configuration of the present invention, the main pump flow rate control system of a small class excavator, auto idle piston 122 and the swash plate 115 and the connection to be installed; The auto idle spring providing an elastic force to the piston 123; made of regulator 120 is further configured to include an auto idle pressure formed from the auto idle pressure line provided in the main control valve to one side of the regulator 120 If F2 power supply accepts this by configuring the spring so that the elastic force (F2) is applied to the piston toward the auto idle power (F1) is applied at the same time Jim and applied toward the sprinkler compared to F1, the main move to reduce the inclination angle of the swash plate and with a minimum discharge flow rate regulators using the auto idle signal configured to reduce the flow rate discharged from the pump for a small class excavator main pump of the invention is characterized in. ;