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Backstop used for transmission spacing of lead screw and silk nut

A technology of backstop and lead screw, which is applied in transmission devices, belts/chains/gears, mechanical equipment, etc. It can solve the problems of cumbersome repeated positioning of the debugging end position, etc., and achieve simple structure, easy manufacturing, and improved reliability. Effect

Active Publication Date: 2013-01-23
中国航天科工集团第二研究院二十三所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a backstop for the limit of screw and screw nut drive, which solves the cumbersome process of screw and screw drive at the two ends of the travel limit "hitting the top" and the repeated positioning of the debugging end. The problem

Method used

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  • Backstop used for transmission spacing of lead screw and silk nut
  • Backstop used for transmission spacing of lead screw and silk nut
  • Backstop used for transmission spacing of lead screw and silk nut

Examples

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Embodiment Construction

[0032] A backstop for the transmission limit of a lead screw 2 and a screw nut 4, comprising: a backstop block 1, a support rod 6, a spring 5, a bottom plate 7 and a stop rod 3.

[0033] The middle part of the backstop block 1 is a round hole, and there is an axisymmetric groove around the hole. One side of the groove is an upright edge, and the other side is an introduction groove. The direction of the introduction groove is the same as that of the lead screw 2 or nut 4 There are six stepped holes on the backstop block 1; there are six stepped holes on the bottom plate 7 corresponding to the stepped holes of the backstop block 1; the stop rod 3 is a cylinder, placed on the screw 2 top and bottom ends. The leading screw 2 passes through the middle of the circular hole in the middle part of the backstop block 1 . The support rod 6 passes through the step hole of the backstop block 1 and the step hole of the bottom plate 7, and connects the backstop block 1 and the bottom plate...

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Abstract

The invention discloses a backstop used for transmission spacing of a lead screw and a silk nut. The backstop comprises a back stop block (1), a lead screw (3), a stop rod (4), a silk nut (5), a spring (6), a support rod (7) and a bottom plate (8), wherein the backstop is interacted with the stop rod (4) so as to generate an effect of similar machine limit stop, and specifically, the stop rod (4) sinks into a groove of the back stop block (1) so as to achieve a clamping purpose. Axial pressure is changed into periphery tangential pressure, thereby not causing locking. As the stop rod (4) is clamped in the back stop block (1), the length of the limiting journey of the two ends of the stop rod (4) is fixed, two limiting positions have high repeatability, and the spacing precision and spacing repeatable accuracy are maximally improved.

Description

technical field [0001] The invention relates to a screw and screw nut drive limiting device, in particular to a backstop for screw and screw nut drive limit. Background technique [0002] The transmission form of screw and screw nut is widely used in the mechanical design of turning rotary motion into linear motion. For the safety limit method at both ends of the stroke, limit switches are generally used to realize stop control to prevent running to the limit position. However, once the limit switch becomes loose or malfunctions, a phenomenon of "top bumping" will occur, resulting in the locking of the lead screw nut. Especially for high-power equipment, production can only be stopped for repair, and in severe cases, equipment damage will also be caused. [0003] In addition, the control of repeated stopping and accurate positioning of the screw and screw nut drive is generally solved by using a servo system plus a position electric switch, but the debugging is cumbersome an...

Claims

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Application Information

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IPC IPC(8): F16H25/24
Inventor 沈营邱王笃星
Owner 中国航天科工集团第二研究院二十三所