Telescopic rotary hydraulic cylinder

Abstract

The invention discloses a telescopic rotary hydraulic cylinder. The telescopic rotary hydraulic cylinder comprises a cylinder body, a piston, a piston rod and end covers covering the two ends of the cylinder body, the piston rod and the end covers are matched in the mode that the piston rod and the end covers can axially slide in a sealed mode and can rotate in a sealed mode, the inner sides of the end covers are connected with rotating assemblies used for being driven by hydraulic oil injected into or flowing out of the cylinder body to rotate, a guide rod axially penetrating through the piston in a sliding mode is arranged in the cylinder body, and the two ends of the guide rod are connected to the rotating assemblies and synchronously rotate along with the rotating assemblies. Hydraulic oil injected into or flowing out is used as power, the piston can be driven to axially slide and rotate, other external power equipment additionally arranged for driving the piston rod to rotate is not needed, circumferential acting force can be applied to the piston through the cooperation of the piston and the guide rod, axial resistance to the piston can be reduced, and the local stress concentration phenomenon of the piston is improved, so that the piston slides smoothly in the axial direction, and the operation stability and reliability of the whole hydraulic cylinder are improved.

Description

technical field [0001] The invention relates to the technical field of hydraulic cylinders, in particular to a telescopic rotary hydraulic cylinder. Background technique [0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy. When it is used to realize reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the movement is stable. It is widely used in hydraulic systems of various machines. The traditional hydraulic cylinder includes a cylinder body, a piston and a piston rod. There are oil inlet and outlet ports on the cylinder body. The movement of the piston and piston rod is realized through the entry and exit of hydraulic oil, and various control functions are realized through external components. The hydraulic rod The motions are linear motions, and the driven external components also do linear motions. [0003] In the actual production process, many external component...

AI Technical Summary

Problems solved by technology

At present, the commonly used method is to realize the rotation of the hydraulic cylinder by adding other hydraulic systems, or using valve groups and other auxiliary mechanisms, which has the disadvantages of complex structure and high cost of the overall hydraulic system.

Images