Helical plastic wire flexible shaft for reducing noise and manufacturing method thereof

Abstract

The invention discloses a helical plastic wire flexible shaft for reducing the noise and a manufacturing method thereof, belonging to the field of mechanical transmission components. The helical plastic wire flexible shaft is characterized in that multiple steel wires are helically wound on the surface of a shaft core in layers; one steel wire at the outermost layer is replaced by a plastic wire; the flexible shaft wound therefrom is shaped through square upsetting; the plastic wires formed on the square surface and the sides opposite the angle are convex to be tightly matched in square-hole parts. The specific manufacturing method comprises the steps of: dismantling one steel wire of the common flexible shaft which undergoes heat treatment, and synchronously placing a plastic covered steel wire or a pure plastic wire to manufacture a semi-finished helical plastic-wire flexible shaft; carrying out square upsetting on the semi-finished helical plastic-wire flexible shaft; dragging, with a fixed length, the semi-finished helical plastic-wire flexible shaft to a burring device to remove the burrs generated in the square upsetting process; and dragging, with a fixed length, the semi-finished helical plastic-wire flexible shaft to a cutting device to cut off the flexible shaft from the square upsetting position, so as to manufacture a finished helical plastic-wire flexible shaft. The invention has simple product structure, can greatly reduce and even eliminate the occurrence of the noise, prolongs the service life of the flexible shaft, and has the advantages of simple manufacturing process and high degree of automation.

Description

technical field [0001] The invention relates to a flexible shaft for transmitting rotary motion in a mechanical transmission part, in particular to a spiral plastic wire flexible shaft for reducing noise and a preparation method thereof. Background technique [0002] When the parts that rotate in mechanical equipment or mechanical devices rotate around the axis, they will also rotate or swing away from the axis, which requires the use of flexible shafts instead of hard shafts for the transmission of rotational motion; In automobiles or other mechanical equipment, flexible shafts are often used to transmit torque. One end of the flexible shaft is connected to the coupling in the engine or power output device, and the other end is connected to the rotating parts; the existing soft shaft The shaft is generally made of a metal rope or wire as the shaft core, and a plurality of steel wires are wound outside, which not only has flexibility, but also has good torsional strength; T...

AI Technical Summary

Problems solved by technology

[0002] When the parts that rotate in mechanical equipment or mechanical devices rotate around the axis, they will also rotate or swing away from the axis, which requires the use of flexible shafts instead of hard shafts for the transmission of rotational motion; In automobiles or other mechanical equipment, flexible shafts are often used to transmit torque. One end of the flexible shaft is connected to the coupling in the engine or power output device, and the other end is connected to the rotating parts; the existing soft shaft The shaft is generally made of a metal rope or wire as the shaft core, and a plurality of steel wires are wound outside, which not only has flexibility, but also has good torsional strength; There is a certain gap in the connection of the square hole of the coupling in the output device, which causes the flexible shaft to rub or collide with the square hole during repeated high-speed operation, causing wear on the square head of the flexible shaft and the square hole of the accessories, affecting the flexible shaft. service life, the bigger problem is that it produces a lot of noise, which affects the comfort of the driver of the vehicle or mechanical equipment

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