The invention discloses an energy-saving heavy dumper with lifting protection and a hydraulic control system thereof. The energy-saving heavy dump truck comprises a truck head, a truck frame and a truck box arranged on the truck frame, the bottom of one end of the truck box is hinged to the truck frame, a lifting oil cylinder is arranged on the top face of the end, close to the truck head, of the truck frame, a supporting rod is arranged on the top face of the end, away from the truck head, of the truck frame, and the bottom end of the supporting rod is hinged to the truck frame. A first control rod, a second control rod and a guide rod are arranged on the side face of the supporting rod, a double-end oil cylinder is arranged in the frame, a first pull wire is arranged between the output end of the side, away from the supporting rod, of the double-end oil cylinder and the first control rod, and a second pull wire is connected to the output end of the side, close to the supporting rod, of the double-end oil cylinder and connected with the second control rod. During lifting, the first pull wire and the second pull wire are controlled to act through the double-head oil cylinder to achieve lifting of the supporting rod, overhauling is conducted after the carriage is lifted, and the potential safety hazard that the carriage falls down is effectively avoided; when the lifting oil cylinder is lifted to the limit position, the piston rod of the limiting valve is pushed, oil feeding is cut off, excessive lifting is avoided, hydraulic pressure impact is avoided, and the service life and structural stability of the oil cylinder are improved.
本发明公开一种带举升保护的节能重型自卸车及其液压控制系统,包括车头、车架以及设在车架上的车箱,车箱一端底部与车架铰接,车架靠近车头一端顶面设有举升油缸,远离车头一端顶面设有用于支撑杆,支撑杆底端与车架铰接,支撑杆侧面设有第一控制杆、第二控制杆和导向杆,车架内设有双头油缸,双头油缸远离支撑杆一侧的输出端与第一控制杆间设有第一拉线,双头油缸靠近支撑杆一侧输出端连接有第二拉线,第二拉线经过导向杆与第二控制杆连接。本发明举升时通过双头油缸控制第一拉线和第二拉线动作实现支撑杆的举升,对车箱举起后检修进行支撑有效避免箱体下落安全隐患;当举升油缸举升至极限位置时推动限位阀活塞杆,断开进油,避免过量举升,避免液压压力冲击提高油缸寿命和结构稳定性。
Energy-saving heavy dump truck with lifting protection function and hydraulic control system of energy-saving heavy dump truck
一种带举升保护的节能重型自卸车及其液压控制系统
2021-04-16
Patent
Elektronische Ressource
Chinesisch
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