Multi-stage synchronous screw rod push rod mechanism

Abstract

The invention discloses a multi-stage synchronous screw rod push rod mechanism. The multi-stage synchronous screw rod push rod mechanism comprises a transmission mechanism, a stretching mechanism, a fixing mechanism and a guide mechanism. A servo motor of the transmission mechanism drives a first-stage ball screw of a first-stage transmission mechanism to rotate through a motor synchronous pulleyand a ball screw synchronous pulley sequentially, the first-stage ball screw drives a first-stage ball nut and a first-stage guide mechanism to move so as to drive the other-stage hollow ball screws to rotate separately, thereby driving the ball nuts and guide mechanisms corresponding to the hollow ball screws at the same stage to move through the stretching mechanism. The multi-stage synchronousscrew rod pushing rod mechanism is small in size and capable of realizing large-stroke transmission, high-precision expansion about n times of the length of the mechanism is realized, and a pluralityof sections can be expanded and retracted simultaneously. The multi-stage ball screw push rod mechanism can achieve synchronous expansion and retraction of the multi-stage ball screws at the same speed, and has the characteristics of being high in transmission precision, small in occupied space, high in transmission efficiency, low in noise and the like.

Description

technical field [0001] The invention belongs to the technical field of mechanical device transmission and the technical field of rolling functional component transmission, in particular to a multi-stage synchronous screw push rod mechanism. Background technique [0002] The push rod mechanism is a driving device that converts a certain form of motion into a linear reciprocating motion of the push rod. It can be used as an executive machine and used in various simple or complex processes to achieve remote control, centralized control or automatic control. As a relatively general auxiliary drive device, the push rod mechanism is widely used in the fields of mechanical transmission, platform lifting, and heavy object lifting. There are various forms of push rod mechanisms: the driving forms include manual, electric, pneumatic and hydraulic, etc., and the push rod forms also include cam type, scissor type and hydraulic cylinder type. The push rod mechanism has the characterist...

AI Technical Summary

Problems solved by technology

[0003] Although electric push rod mechanisms with the characteristics of small size and large stroke have appeared on the market at present, there are still relatively few electric push rod mechanisms that can have the advantages of small size, large stroke, easy automatic control, accurate and controllable end position and speed, etc. Lack, especially the high rigidity, high precision, large stroke multi-stage electric push rod mechanism that can be applied to film and television shooting equipment, precision cutting machine tools and other industries, is almost blank or just in its infancy

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