Title:
WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2024/085269
Kind Code:
A1
Abstract:
This work machine may comprise: a tank; a working fluid pump configured to receive a fluid from the tank, pressurize the fluid, and discharge the working fluid; a quick coupler having a coupling position, at which the quick coupler is coupled to a work tool, and an uncoupling position, at which the quick coupler receives a first working fluid from the working fluid pump and becomes uncoupled from a work tool due to the pressure of the first working fluid; a flow control valve located between the working fluid pump and the tank and configured to switch between a neutral position, at which the flow of a second working fluid returning from the working fluid pump to the tank is permitted, and a non-neutral position, at which the flow of the second working fluid returning from the working fluid pump to the tank is blocked, and control the flow rate of the second working fluid returning from the working fluid pump to the tank according to the amount of switching from the neutral position to the non-neutral position; an input unit that receives a command to uncouple the work tool and the quick coupler; and a control unit that controls the flow control valve while the uncoupling command input to the input unit is being maintained, the flow control valve being controlled so that the switching amount of the flow control valve from the neutral position to the non-neutral position is reduced to a value greater than zero after the flow control valve is switched to the non-neutral position.
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Inventors:
SON YOUNGJIN (KR)
LEE CHANGHOON (KR)
LEE CHANGHOON (KR)
Application Number:
PCT/KR2022/015854
Publication Date:
April 25, 2024
Filing Date:
October 18, 2022
Export Citation:
Assignee:
VOLVO CONSTRUCTION EQUIPMENT AB (SE)
SON YOUNGJIN (KR)
LEE CHANGHOON (KR)
SON YOUNGJIN (KR)
LEE CHANGHOON (KR)
International Classes:
E02F3/36; E02F9/22
Attorney, Agent or Firm:
KIM, Seon-Min (KR)
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