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A backlash-eliminating device and method for a lead screw nut pair, a lead screw nut pair

A screw nut and clearance technology, which is applied to the transmission device, transmission device parts, belt/chain/gear, etc., can solve the problems of aggravated extrusion deformation, uncontrollable pre-tightening force, etc., and achieve the effect of smooth transmission and simple structure

Active Publication Date: 2019-07-12
BEIJING MECHANICAL EQUIP INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And when the adjusting bolt 4 is tightened, the pretightening force generated by the deformation of the elastic washer is also uncontrollable, which will increase the tension between the thread of the main nut 2 and the thread of the screw 1, and between the thread of the adjusting nut 3 and the screw. 1 extrusion deformation between the screw teeth

Method used

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  • A backlash-eliminating device and method for a lead screw nut pair, a lead screw nut pair
  • A backlash-eliminating device and method for a lead screw nut pair, a lead screw nut pair
  • A backlash-eliminating device and method for a lead screw nut pair, a lead screw nut pair

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Experimental program
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Effect test

Embodiment 1

[0032] This embodiment provides an anti-backlash device for a screw nut pair, see image 3 , The lead screw nut pair includes the lead screw 1 and the main nut 2, and the anti-backlash device includes the adjustment nut 3, the adjustment bolt 4 and the clearance adjustment bolt 5. Wherein, the main nut 2 and the adjustment nut 3 are respectively connected with the lead screw 1, and there is an adjustment gap between the main nut 2 and the adjustment nut 3; the adjustment bolt 4 is respectively connected with the main nut 2 and the adjustment nut 3 to reduce the The adjustment gap between the main nut 2 and the adjustment nut 3 ; the gap adjustment bolt 5 abuts between the main nut 2 and the adjustment nut 3 , and is used to increase the adjustment gap between the main nut 2 and the adjustment nut 3 .

[0033] When there is a transmission gap between the lead screw 1 and the main nut 2, the adjustment gap between the main nut 2 and the adjustment nut 3 can be reduced by tighten...

Embodiment 2

[0050] This embodiment provides a lead screw and nut pair, which includes the backlash elimination device for the lead screw and nut pair provided in Embodiment 1.

[0051] Compared with the prior art, the anti-backlash device in the lead screw nut pair provided by this embodiment is provided with an adjusting bolt for reducing the adjustment gap between the main nut and the adjusting nut, and the above-mentioned anti-backlash device also includes Gap adjustment bolts are provided to increase the adjustment gap between the main nut and the adjustment nut. Through the mutual cooperation of the adjustment bolt and the gap adjustment bolt, the above adjustment gap can be adjusted to a suitable size, thereby eliminating the need for the lead screw Under the premise of the transmission clearance between the main nut and the main nut, reduce the extrusion deformation between the thread of the main nut and the thread of the lead screw, and between the thread of the adjusting nut and t...

Embodiment 3

[0055] This embodiment provides a backlash elimination method for a lead screw and nut pair. The backlash elimination device for a lead screw and nut pair in the first embodiment is adopted. When a transmission gap is generated between the lead screw and the main nut, the elimination The clearance method includes the following steps: tighten the adjustment bolt, the adjustment clearance between the main nut and the adjustment nut is reduced; loosen the clearance adjustment bolt, so that the length of the clearance adjustment bolt screwed into the adjustment nut is reduced, and the gap between the main nut and the adjustment nut is reduced. The adjustment gap increases, so that the reduction value of the adjustment gap is greater than or equal to the size of the transmission gap, and the clearance operation of the screw nut pair is completed.

[0056] Specifically, the above-mentioned backlash elimination method for the lead screw nut pair includes the following methods:

[005...

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Abstract

The invention relates to a screw nut pair structure, in particular to a gap eliminating device and a method for a screw nut pair and the screw nut pair. Under the precondition of eliminating a transmission gap between a lead screw and a main nut, the extrusion deformation between threads of the main nut and threads of the lead screw and between threads of an adjusting nut and the threads of the lead screw is reduced. The screw nut pair comprises the lead screw and the main nut; the gap eliminating device comprises the adjusting nut, an adjusting bolt and a gap adjusting bolt; the main nut and the adjusting nut are matched and connected with the lead screw; an adjusting gap is formed between the main nut and the adjusting nut; the adjusting bolt is matched and connected with the main nut and the adjusting nut; and the gap adjusting bolt butts between the adjusting nut and the main nut. The screw nut pair comprises the gap eliminating device for the screw nut pair. The gap eliminating device for the screw nut pair is used for eliminating the transmission gap between the lead screw and the main nut of the screw nut pair.

Description

technical field [0001] The invention relates to a structure of a lead screw nut pair, in particular to a backlash elimination device and method for a lead screw nut pair, and a lead screw nut pair. Background technique [0002] The screw nut pair is a structure that converts rotary motion into linear motion, or converts linear motion into rotary motion, see figure 1 , usually includes a lead screw 1 and a main nut 2 cooperating with the lead screw 1, which is widely used in transmission systems such as flip-up steering gears and machine tools. [0003] However, in the long-term transmission process, due to sliding friction, material wear will occur between the lead screw 1 and the main nut 2, resulting in a transmission gap between the two. Especially when it is applied to the upper steering gear, the gap between the screw and the nut pair will cause a dead zone in the transmission system, thereby affecting the accuracy of the deflection angle of the rudder surface, and eve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H25/20F16H57/12
CPCF16H25/2003
Inventor 付星星马俊杨培龚玉帅马文桥李兆凯李石王留民仲启亮张翔
Owner BEIJING MECHANICAL EQUIP INST