The invention discloses a hydraulic control system of a plug pin mechanism and engineering machinery, the plug pin mechanism comprises a pin pulling plate and a cylinder pin which are installed on a telescopic oil cylinder, and the hydraulic control system comprises a central oil duct which axially penetrates through the telescopic oil cylinder; the oil supply and return path is connected to the front end of the central oil duct and is provided with a front reversing valve for controlling oil supply or oil return; the telescopic control oil way is connected to the rear end of the center oil way and provided with a rear reversing valve, and the rear reversing valve is used for switching the rear end of the center oil way to be communicated with the control cavity of the pin pulling plate or the control cavity of the cylinder pin. Wherein the central oil duct can keep a high-pressure state, on this basis, the extension and retraction of the pin pulling plate and the cylinder pin can be controlled through the extension and retraction control oil way and the rear reversing valve, and the retraction state of the pin pulling plate and the cylinder pin is not locked by an electromagnetic valve, but the central oil duct keeps high pressure all the time, so that the reliability is greatly improved; in addition, when the rear reversing valve is in a power-off state, the pin pulling plate can be retracted, the oil cylinder and the suspension arm are retracted, and maintenance operation is facilitated.
本申请公开了一种插销机构的液压控制系统和工程机械,插销机构包括安装于伸缩油缸上的拔销板和缸销,液压控制系统包括中心油道,轴向贯穿伸缩油缸;供油回油油路,连接至中心油道的前端并设有控制供油或回油的前换向阀;以及伸缩控制油路,连接于中心油道的后端并设有后换向阀,后换向阀用于将中心油道的后端切换连通至拔销板的控制腔或缸销的控制腔。其中,中心油道可保持高压状态,在此基础上可通过伸缩控制油路和后换向阀控制拔销板、缸销的伸缩,因拔销板、缸销的回缩状态不依靠电磁阀锁定,而是中心油道一直保持高压即可,使得可靠性大大提升,另外在后换向阀的失电状态下也可将拔销板缩回,油缸连同吊臂缩回,便于维修操作。
Hydraulic control system of bolt mechanism and engineering machinery
插销机构的液压控制系统和工程机械
2024-01-05
Patent
Elektronische Ressource
Chinesisch
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