Electro-hydraulic proportional valve

An electro-hydraulic proportional valve, comprising:

• a valve core;
• a valve sleeve, configured to sleeve an outside of the valve core;
• a valve body, configured to sleeve an outside of the valve sleeve and fixedly connected to the valve sleeve;
• a left end cap, configured to cover an end of the valve body, wherein a left sensitive cavity is defined by the left end cap, the valve body, and the valve sleeve;
• a right end cap, configured to cover another end of the valve body, wherein a right sensitive cavity is defined by the right end cap, the valve body, and the valve sleeve;
• a driving mechanism, disposed at an outside of the valve body;
• and
• a transmission mechanism, connected to the driving mechanism and the valve core, wherein the transmission mechanism is configured to be driven by the driving mechanism to drive the valve core to rotate along a circumferential direction of the valve core with respect to the valve sleeve, enabling a hydraulic pressure difference to be generated between the left sensitive cavity and the right sensitive cavity, and the valve core is configured to be driven by the hydraulic pressure difference to move along an axial direction of the valve core with respect to the valve sleeve;
• wherein a middle portion of the valve body defines a through hole, a middle portion of the valve core defines a slot;
• the driving mechanism is disposed on a side of the valve body along a radial direction of the valve core;
• the transmission mechanism comprises a transmission rod and a lever, an end of the transmission rod is connected to an end of the lever, another end of the transmission rod is connected to the driving mechanism, and another end of the lever is received in and passes through the through hole and is received in the slot;
• the lever and the transmission rod are eccentrically configured;
• the transmission rod is configured to be driven by the driving mechanism to rotate;
• the transmission rod is configured to drive the lever to rotate around the transmission rod;
• the lever is configured to drive the valve core to rotate along the circumferential direction of the valve core with respect to the valve body;
• a size of the slot along the axial direction of the valve core is greater than a size of the slot along a direction perpendicular to the axial direction of the valve core and an axial direction of the transmission rod.