Electro-hydraulic servo numerical control push rod device

Abstract

The invention discloses an electro-hydraulic servo numerical control push rod device. The electro-hydraulic servo numerical control push rod device comprises a shell and a servo motor located inside the shell, wherein a coaxially-arranged screw rod is connected with one output shaft of the servo motor; a nut is in threaded sleeved with the screw rod; the electro-hydraulic servo numerical control push rod device further comprises a push rod which is coaxially fixedly connected with the nut. The electro-hydraulic servo numerical control push rod device is characterized in that the servo motor is a double-shaft motor; another output shaft of the servo motor drives a set of hydraulic push system composed of an oil pump, a hydraulic cavity, a hydraulic channel and an electromagnetic control valve. The electro-hydraulic servo numerical control push rod device integrates the advantages of an existing two kinds of push rod devices, and overcomes the disadvantages of the both push rod devices, so that not only can the movement precision be accurately controlled, but also the flexible regulation can be realized. Furthermore, the electro-hydraulic servo numerical control push rod device can be used for bearing a large load and a flexible load, and has a wide application range.

Description

technical field [0001] The invention relates to a push rod device, in particular to an electro-hydraulic servo numerical control push rod device. [0002] Background technique [0003] The push rod device is a power device used to generate reciprocating push action, and is suitable for various occasions that need to provide repeated directional thrust. [0004] At present, push rod devices on the market generally have two structural forms. One is an electric push rod, which includes an electric servo push rod. Its structure is to use a motor as a power source. Generally, the rotation is converted into the horizontal movement of the screw by the cooperation of the screw nut pair to achieve reciprocating push. When the motor is a servo motor It is the servo push rod. The other is a hydraulic push rod. Its structure is to use a hydraulic pump as a power source. The hydraulic pump controls and converts the hydraulic pressure of the oil chamber at both ends of the piston, and ...

AI Technical Summary

Problems solved by technology

[0005] Ordinary electric push rods can only do intermittent push-pull movements with a load of several tons and can be self-locking, with a 40% lower efficiency

The servo push rod has high motion precision and can adjust the speed. It is suitable for places with motion precision requirements, but it is not suitable for force push and pull control of a load of more than ten tons. The servo power is high and the cost is high, and there is no force feedback control.

The hydraulic push rod is suitable for intermittent vigorous push and pull, flexible load relief, and can sense the push and pull force, but the precision is low, it cannot be operated at high speed, and the heat is serious for a long time

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