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Device capable of regulating and controlling axial pre-tightening force of screw rod

A technology of axial pre-tightening force and lead screw, which is applied in the direction of transmission, belt/chain/gear, mechanical equipment, etc., can solve the problems of inability to optimize transmission characteristics, non-adjustable control of axial force, etc., and achieve high rigidity and structure Simple, the effect of improving the axial rigidity

Inactive Publication Date: 2014-11-12
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] On CNC machine tools or precision mechanical equipment, the axial tensile preload can increase the stiffness, reduce the influence of thermal deformation of the screw and improve the dynamic characteristics of the screw, but the axial force of the current preload device is usually not adjustable and controllable. Transmission characteristics are optimized

Method used

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  • Device capable of regulating and controlling axial pre-tightening force of screw rod
  • Device capable of regulating and controlling axial pre-tightening force of screw rod

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Embodiment 1

[0015] In the present invention, on a numerically controlled machine tool or a precision mechanical device, the axial tensile pretightening force can increase the rigidity, reduce the influence of thermal deformation of the lead screw, and improve the dynamic characteristics of the lead screw.

[0016] The device is composed of shaft end baffle 1, connecting screw 2, shaft end nut 3, back-to-back angular contact bearing 4, leading screw 5, nut 6, bearing 7, position detector 8 and electromagnet 9. The shaft end baffle 1, the connecting screw 2, the shaft end nut 3, and the back-to-back angular contact bearing 4 ensure that the left end of the screw is supported in two axial directions, and the right end is supported to slide freely. An electromagnet 9 is provided at the free end of the lead screw to provide axial pre-tightening force, and a position detector 8 detects the position of the shaft end. Thereby reducing the transmission error and improving the transmission accuracy...

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PUM

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Abstract

The invention provides a device capable of regulating and controlling an axial pre-tightening force of a screw rod and relates to a mechanical device. The device comprises an axial end baffle (1), a connecting bolt (2), an axial end nut (3), a back-to-back angular contact bearing (4), a screw rod (5), a nut (6), a bearing (7), a position detector (8) and an electromagnet (9), wherein the axial end baffle (1), the connecting bolt (2), the axial end nut (3) and the back-to-back angular contact bearing (4) are double-axially fixed and supported at the left end of the screw rod; the electromagnet (9) is arranged at the free end of the screw rod; the position detector (8) is arranged at the free end of the screw rod. During a working process, the power is supplied by the electromagnet, a magnetic field is generated, and the axial end of the screw rod 5 is absorbed, so that an axial pre-tightening force is supplied, the magnitude of the pre-tightening force is adjusted in real time, the influence on the screw rod driving caused by the change in outside environment and use demand is compensated, and the driving precision is increased. The device is fit for the high-precision mechanical driving of numerical control machine tools and the like.

Description

technical field [0001] The invention relates to a mechanical device, in particular to a device capable of adjusting the axial pretightening force of a lead screw. Background technique [0002] On CNC machine tools or precision mechanical equipment, the axial tensile preload can increase the stiffness, reduce the influence of thermal deformation of the screw and improve the dynamic characteristics of the screw, but the axial force of the current preload device is usually not adjustable and controllable. The transmission characteristics are optimized. Contents of the invention [0003] The object of the present invention is to provide a device that can adjust the axial preload of the lead screw. The free end of the lead screw is provided with an electromagnet. During operation, the electromagnet is powered to generate a magnetic field to attract the shaft end of the lead screw, thereby providing a shaft The axial preload can increase the axial stiffness, reduce the infl...

Claims

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Application Information

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IPC IPC(8): F16H25/24
CPCF16H25/24F16H25/2015F16H2025/204
Inventor 李铁军魏亮
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY