Force balance type electric cylinder featuring fluid circulation

Abstract

The invention discloses a force balance type electric cylinder featuring fluid circulation, comprising a bearing, a screw, a screw nut and an oil cylinder body. The oil cylinder body comprises a cylinder barrel, a front end cover, a rear end cover and a piston rod which can move back and forth in the cylinder barrel. The front end cover and the rear end cover are respectively arranged in front ofand at the back of the cylinder barrel. The screw nut is in rigid connection with the piston rod. A first oil holding cavity is formed between the screw and the piston rod. A second oil holding cavityis formed between the cylinder barrel of the oil cylinder body and the piston rod. A first hydraulic circuit connector and a second hydraulic circuit connector are arranged on the oil cylinder body and are respectively connected with a first one-way valve and a second one-way valve, with opposite flow directions, by pipelines. An energy accumulator is connected between the first one-way valve andthe second one-way valve by a pipeline. The front end of the cylinder barrel is provided with at least a group of first magnetic inductive switches and the rear end thereof is provided with at leasta group of second magnetic inductive switches. A permanent magnet guiding slide block is arranged at the rear end of the piston rod. A guide rail is arranged at one side of the cylinder barrel. A tensile hydraulic damping buffer mechanism for limit protection and a retractile hydraulic damping buffer mechanism for limit protection are arranged between the oil cylinder body and the piston rod. Thefirst oil holding cavity, the second oil holding cavity, the first one-way valve, the second one-way valve, the energy accumulator and a connecting pipeline are full of hydraulic circulating media with pressure.

Description

Technical field: [0001] The invention relates to the technical field of electric linear actuators, in particular to an electric cylinder. Background technique: [0002] The electric cylinder is an integrated mechanical mechanism that converts the rotational motion of the motor into a linear telescopic motion, also known as an electric linear actuator. Generally, the motor drives the ball screw (or planetary screw, body screw, etc.) to complete the power transmission. According to the installation method of the motor, it can be divided into linear type, folding type, vertical type and other structural types. [0003] The electric cylinder can realize position control, linear pull pressure control, and has the function of self-locking position when power is off. Electric cylinders are used in industrial robots, CNC machine tools, clamping equipment, lifting equipment, multi-degree-of-freedom motion platforms, wave machines, reciprocating vibrating screens and other fields. ...

AI Technical Summary

Problems solved by technology

[0004] In the application field of electric cylinder with axial compression load, the positive and negative torque output of the electric cylinder motor is unbalanced. If the average output torque in the positive direction is more than twice the average output torque in the negative direction, the user often chooses a large-load motor to solve the problem, but it will bring The problem of waste of resources and costs

Images