Backhoe loader energy recovery and reuse system and control method thereof, and backhoe loader

A control method of a backhoe loader energy recovery and reuse system that includes an actuator configured to drive a working device of a backhoe loader to perform an action with hydraulic oil as a medium, the actuator having a first cavity and a second cavity;

• a reversing valve, having a first working oil port communicated with the first cavity and a second working oil port communicated with the second cavity, the reversing valve being configured to reverse the actuator;
• a stabilizing valve group, having a first oil port, a second oil port, a third oil port, and a fourth oil port, the first oil port and the second oil port being communicated with the first cavity and the second cavity, respectively. and the third oil port being communicated with an oil tank;
• and an energy storage part, communicated with the fourth oil port and configured to store hydraulic energy;
• wherein the first oil port and the third oil port have a first communication state therebetween, in the first communication state, the hydraulic oil in the first cavity can enter the oil tank;
• the second oil port and the fourth oil port can be selectively connected or disconnected, and in a connected state, the second cavity is communicated with the energy storage part;
• wherein the actuator comprises a derricking cylinder configured to drive an excavation arm or a loading arm to rotate in a vertical plane;
• and wherein the backhoe loader energy recovery and reuse system further comprises a detection component which comprises:
• a first displacement sensor, configured to detect a displacement of a piston rod of the derricking cylinder;
• and a first pressure sensor, configured to detect a pressure in the first cavity of the derricking cylinder, the method comprising:
• receiving at least one of a working state of the actuator and the working device detected by the detection component;
• and
• in case that a displacement of the piston rod of the derricking cylinder detected by the first displacement sensor exceeds a first preset displacement, and the pressure in the derricking cylinder detected by the first pressure sensor exceeds a first preset pressure, making the stabilizing valve group in a state of communicating the second cavity with the energy storage part.