A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Hydraulic system for working machine, and working machine
The present invention suppresses a decrease in the response speed of an electromagnetic proportional valve (45) at low temperatures. HYDRAULIC SYSTEM (S) FOR WORKING MACHINE (1), HYDRAULIC ACTUATOR (AC), DIRECTION SWITCHING VALVE (41), ELECTROMAGNETIC PROPERTIAL VALVE (45), CONTROL DEVICE (70) FOR CONTROLLING CURRENT SUPPLY TO ELECTROMAGNETIC PROPERTIAL VALVE (45), OPERATING MEMBER (75) FOR OPERATING HYDRAULIC ACTUATOR (AC), AND HYDRAULIC ACTUATOR (AC) The control device (70) performs switching operation between a permitted operation for driving the hydraulic fluid and a disallowed operation for not permitting the driving of the hydraulic fluid when the permitted operation (77) is performed with the disallowed operation and the temperature of the hydraulic fluid is less than a predetermined temperature, and performs switching operation between a permitted operation for driving the hydraulic fluid and a disallowed operation for not permitting the driving of the hydraulic fluid. A first standby current of a first current value (Ia) defined in a range in which the switching position of the direction switching valve (41) is not switched is supplied to the electromagnetic proportional valve (45).
抑制低温时的电磁比例阀(45)的响应速度的降低。作业机(1)的液压系统(S)具有：液压致动器(AC)、方向切换阀(41)、电磁比例阀(45)、控制向电磁比例阀(45)供给的电流的控制装置(70)、供作业者操作液压致动器(AC)的操作构件(75)、以及能够在允许液压致动器(AC)的驱动的允许操作和不允许驱动的不允许操作之间进行切换操作的允许操作件(77)，控制装置(70)在允许操作件(77)被执行不允许操作，且工作油的温度小于规定温度的情况下，向电磁比例阀(45)供给被定义在方向切换阀(41)的切换位置不切换的范围中的第一电流值(Ia)的第一待机电流。
Hydraulic system for working machine, and working machine
The present invention suppresses a decrease in the response speed of an electromagnetic proportional valve (45) at low temperatures. HYDRAULIC SYSTEM (S) FOR WORKING MACHINE (1), HYDRAULIC ACTUATOR (AC), DIRECTION SWITCHING VALVE (41), ELECTROMAGNETIC PROPERTIAL VALVE (45), CONTROL DEVICE (70) FOR CONTROLLING CURRENT SUPPLY TO ELECTROMAGNETIC PROPERTIAL VALVE (45), OPERATING MEMBER (75) FOR OPERATING HYDRAULIC ACTUATOR (AC), AND HYDRAULIC ACTUATOR (AC) The control device (70) performs switching operation between a permitted operation for driving the hydraulic fluid and a disallowed operation for not permitting the driving of the hydraulic fluid when the permitted operation (77) is performed with the disallowed operation and the temperature of the hydraulic fluid is less than a predetermined temperature, and performs switching operation between a permitted operation for driving the hydraulic fluid and a disallowed operation for not permitting the driving of the hydraulic fluid. A first standby current of a first current value (Ia) defined in a range in which the switching position of the direction switching valve (41) is not switched is supplied to the electromagnetic proportional valve (45).
抑制低温时的电磁比例阀(45)的响应速度的降低。作业机(1)的液压系统(S)具有：液压致动器(AC)、方向切换阀(41)、电磁比例阀(45)、控制向电磁比例阀(45)供给的电流的控制装置(70)、供作业者操作液压致动器(AC)的操作构件(75)、以及能够在允许液压致动器(AC)的驱动的允许操作和不允许驱动的不允许操作之间进行切换操作的允许操作件(77)，控制装置(70)在允许操作件(77)被执行不允许操作，且工作油的温度小于规定温度的情况下，向电磁比例阀(45)供给被定义在方向切换阀(41)的切换位置不切换的范围中的第一电流值(Ia)的第一待机电流。
Hydraulic system for working machine, and working machine
作业机的液压系统以及作业机
HORII HIROSHI (author) / MORI YUYA (author)
2024-06-21
Patent
Electronic Resource
Chinese
Hydraulic system for working machine, and working machine
| European Patent Office | 2024
Hydraulic system for working machine, and working machine
| European Patent Office | 2023
HYDRAULIC SYSTEM FOR WORKING MACHINE, AND WORKING MACHINE
| European Patent Office | 2023
HYDRAULIC SYSTEM FOR WORKING MACHINE, AND WORKING MACHINE
| European Patent Office | 2023
Hydraulic system for working machine, and working machine
| European Patent Office | 2024