This electro-hydraulic actuator is provided with: a pump (7) that uses a motor (3) as power; a hydraulic actuator (5) that is preloaded so as to be in a first state, and that reciprocates between the first state and a second state; a reservoir (4); and a fluid circuit that controls the hydraulic actuator using hydraulic pressure, the fluid circuit having: a pressurization flow path (201) that supplies fluid from the pump to the hydraulic actuator; a discharge flow path (300) for discharging the fluid from the hydraulic actuator to the accumulator via an unloading valve (61); a pilot flow path (301) that branches midway in the pressurization flow path and supplies the fluid pressurized to the pilot pressure to the unloading valve; a means (27) for generating pilot pressure during the operation of the pump; a check valve (26) that causes the fluid to pass only in the direction from the pump toward the hydraulic cylinder shifts to the second state when the pump performs an operation, and returns to the first state when the pump is stopped.
本发明的电动液压致动器具有:泵(7),其将电机(3)作为动力;液压致动器(5),其以成为第1状态的方式被预紧,并且在第1状态和第2状态之间往返运动;储液器(4);流体回路,其利用液压对液压致动器进行控制,流体回路具有:将流体从泵供给至液压致动器的加压用流路(201);将流体从液压致动器经由卸载阀(61)向储液器排出的排出用流路(300);在加压用流路的中途进行分支而对卸载阀供给被加压至先导压的流体的先导流路(301);在泵动作中产生先导压的机构(27);使流体仅向从泵朝向液压缸的方向通过的止回阀(26),如果泵执行动作,则转入第2状态,如果泵停止,则恢复为第1状态。
Electro-hydraulic actuator and brake device
电动液压致动器以及制动器装置
2025-04-25
Patent
Electronic Resource
Chinese