Novel electro-hydraulic motor

Abstract

A novel electro-hydraulic motor comprises a motor, a pump and a hydraulic motor. Initial torque is input through a motor shaft, the torque is transmitted to a space cam through meshing transmission ofa gear pair, and a space cam on a piston shaft generates reciprocating motion under the constraint of a bevel roller. Water is sucked in and pressed out through reciprocating motion of the piston, apressing opening of the piston corresponds to a suction opening of the hydraulic motor, a suction opening of the hydraulic pump corresponds to an outlet of the hydraulic motor, and therefore a closedloop between the pump and the hydraulic motor is achieved; high-pressure fluid pushes the piston in a motor cylinder body to move, and then two end face cams are driven to rotate to convert pressure energy into rotating mechanical energy; and splines on the cams enable a motor shaft to rotate. The working efficiency of the novel electro-hydraulic motor is greatly improved, on the other hand, the service life of the electro-hydraulic motor is prolonged, and the novel electro-hydraulic motor has the advantages of being large in torque and small in overall structure.

Description

technical field [0001] The invention relates to a hydraulic motor, which belongs to hydraulic pumps and hydraulic motors in the field of fluid transmission and control. Background technique [0002] The hydraulic motor is the actuator in the hydraulic system, and it is an energy conversion device that converts the hydraulic energy provided by the hydraulic pump into mechanical energy. Hydraulic motors can be divided into two categories, high-speed hydraulic motors and low-speed hydraulic motors. High-speed hydraulic motors include gear motors, screw motors, vane motors, and axial piston motors. Low-speed hydraulic motors include single-acting connecting rod radial piston motors and multi-acting internal curve radial piston motors. The oil inlet and outlet ports of the gear motor are equal, and the leaked oil needs to be led out of the casing through a separate oil drain port. Generally, the gear motor has a large number of teeth, poor sealing performance, and low volumetric...

AI Technical Summary

Problems solved by technology

The structure of the screw motor is relatively complicated and the price is relatively expensive

The output torque of the axial piston motor is larger than that of the gear motor and the vane motor, and the volumetric efficiency is higher, but the anti-pollution ability is worse than that of the gear motor, and the speed cannot be too high

The single-acting connecting rod radial piston motor has a five-pointed star shape (or seven-star shape), large volume and weight, torque pulsation, and poor low-speed stability

The multi-action internal curve radial piston motor adopts the combination of rollers moving in the rails and has a compact structure, but the torque to push the rotor during the transition period is small, the manufacturing process is complicated, and the accuracy is difficult to guarantee

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