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1. 发明申请

WO1980000268A1 DEVICE FOR REMOTE CONTROL OF HYDRAULIC CRANES 审中-公开
标题翻译：液压开关远程控制装置
公开(公告)号：WO1980000268A1
公开(公告)日：1980-02-21
申请号：PCT/JP1979000181
申请日：1979-07-07
申请人： UNIC CORP , AYANO H , MATANO K
发明人： UNIC CORP
IPC分类号： F15B11/04
CPC分类号： B66C13/18 , F15B21/08
摘要： A device for remote control of a hydraulic crane which includes a hydraulic pump, a plurality of fluid actuators for hoisting a boom tilting cylinder, a boom telescopic cylinder, a hoisting motor and a turning motor or the like connected in parallel via oil passages to hydraulic oil supply and exhaust circuits connected to a hydraulic oil tank, operation selecting solenoid valves connected to the oil passage, a proportional solenoid relief valve provided in the oil passage for bypassing the exhaust side of the pump to the tank for controlling the exhaust side hydraulic oil from the hydraulic pump in a crane body and automotive body side, respectively, operation selecting switches for the respective operation selecting solenoids and a potentiometer for controlling the proportional solenoid relief valve in an operation terminal unit wherein the solenoids of the solenoid valves are electrically connected via cables to the switches and potentiometer. In order to control the crane hoisting speed, the conventional relief valve heretofore provided at the exhaust side of the hydraulic pump as a hydraulic oil source is constructed of the proportional solenoid relief valve instead of the conventional flow control valve to thereby control the hydraulic oil and accordingly the operating oil pressure at the exhaust side of the pump. This controls the operating speed of the fluid actuator for hoisting to thereby enable an economical and smooth hoisting operation as well as its remote speed control.

2. 发明申请

WO1981001868A1 HYDRAULIC CIRCUIT FOR HYDRAULIC CRANE 审中-公开
标题翻译：液压起重机液压回路
公开(公告)号：WO1981001868A1
公开(公告)日：1981-07-09
申请号：PCT/JP1980000207
申请日：1980-09-11
申请人： UNIC CORP , NAKAJYO T
发明人： UNIC CORP
IPC分类号： F15B11/16
CPC分类号： F15B11/16 , B66C13/18 , B66C13/42 , F15B2211/30565 , F15B2211/3111 , F15B2211/3116 , F15B2211/3144 , F15B2211/31576 , F15B2211/324 , F15B2211/327 , F15B2211/71 , F15B2211/8643
摘要： A hydraulic circuit for a hydraulic-operated crane, which comprises a manually-operated changeover valve center-bypassed at a neutral position for switching the hydraulic oil from a pump to thereby operate the actuator of the crane, a solenoid valve connected to the return hydraulic circuit of the hydraulic circuit for switching the hydraulic oil to the actuator of the crane to be remotely operated and connected in parallel with the manually-operated changeover valve, said solenoid valve being also connected at the output port to the actuator of the crane, and a proportional solenoid relief valve connected in parallel with the solenoid valve. Thus, the hydraulic crane can be manually directly or remotely independently operated. When both the manual and remote operations are simultaneously executed, the crane can be precisely operated in a superinching manner. The crane can be simply stopped in emergency in both the manual and remote operations.
摘要翻译：一种用于液压起重机的液压回路，其包括在中间位置中心旁路的手动切换阀，用于从泵切换液压油，从而操作起重机的致动器;电磁阀，连接到回油液压用于将液压油切换到起重机致动器的液压回路，用于将其远程操作并与手动切换阀并联连接，所述电磁阀还在输出端口处连接到起重机的致动器，以及与电磁阀并联连接的比例电磁溢流阀。因此，液压起重机可以手动地直接或远程地独立操作。当手动和远程操作同时执行时，起重机可以精确地以超级方式操作。起重机可以在手动和远程操作中紧急停止。

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