Rolling friction trapezoidal screw rod

Abstract

The invention belongs to the field of trapezoidal screw rod driving, and relates to manufacturing of a rolling friction trapezoidal screw rod. The rolling friction trapezoidal screw rod is newly characterized by being formed by two large parts: a trapezoidal screw rod and a rolling friction nut, wherein the rolling friction nut is formed by a nut shell, a trapezoidal screw rolling element and a bearing; the nut shell is connected and fixed with multiple trapezoidal screw pillar rolling elements with screw pitch leads being the same as a screw pitch lead of the trapezoidal screw rod through a bearing; the trapezoidal screw pillar rolling elements are circumferentially distributed in a planet surrounding way in the axial direction of the trapezoidal screw rod and are mutually embedded and enclasped; when the trapezoidal screw rod rotates and the rolling friction nut is fixed, the trapezoidal screw pillar rolling elements self-rotate synchronously along with the trapezoidal screw rod; andmeanwhile, through a screw drive principle, the rotary power of the trapezoidal screw rod is transmitted to the load-carrying nut shell through the bearing, and the rolling friction trapezoidal screwrod is a mechanical product for converting the rotation motion of the trapezoidal screw rod into the straight reciprocating motion of the nut. The rolling friction trapezoidal screw rod provided by the invention becomes a second high-quality type followed in a sliding friction trapezoid screw rod, namely, a common trapezoid screw rod, has a self-locking function, and is reasonable in design and wide in application.

Description

technical field [0001] The invention relates to the field of manufacturing trapezoidal screw rods for thread transmission, in particular to a manufacturing scheme for rolling friction trapezoidal screw rods. Background technique [0002] At present, the known structure of trapezoidal screw mandrel is made up of nut and trapezoidal screw mandrel as a set. When the trapezoidal screw rotates and the nut is fixed, under the action of the helix angle, slippage is generated to push the nut to produce linear displacement motion. There is a helical surface contact sliding friction between the nut and the trapezoidal screw. For this reason, the screw and the nut wear each other and generate thermal effects, which reduces the transmission accuracy. There is sliding friction between the components, which consumes a large input power, so the efficiency Low. Generally, the trapezoidal screw will be equivalently referred to as a sliding friction screw, while the ball and roller screw wi...

AI Technical Summary

Problems solved by technology

Although the current ball and roller screws can handle higher design loads like the trapezoidal screw, and have high transmission efficiency, they cannot replace the trapezoidal screw in many applications.

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