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Gap eliminating nut structure

A nut and clearance technology, applied in the field of anti-backlash nut structure, can solve the problems such as the inner shrinking ring cannot be evenly distributed, the clearance effect is not ideal, the nut cannot carry high load torque, etc. Uniform, extended nut life effect

Pending Publication Date: 2021-06-25
SHANGHAI MOONS ELECTRICAL APPLIANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] After retrieval, Chinese Patent Publication No. CN208595207U discloses an irreversible backlash-eliminating nut. By designing inclined plane fit, it has a certain effect in irreversible clearance elimination. However, the nut itself cannot bear high load torque and shrinks The rings cannot be evenly distributed in actual work, providing uniform contraction force
Thus there are problems such as unsatisfactory effect of eliminating backlash, so how to prevent the nut from rotating, thereby further improving the effect of eliminating backlash of the nut has become a technical problem to be solved

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] Such as figure 1 As shown, an anti-backlash nut structure includes a first nut body 1 and a second nut body 5, and an inner constriction that can provide radial contraction force is provided between the first nut body 1 and the second nut body 5. Assemblies, an anti-rotation mechanism 2 for preventing the nut from rotating is also provided between the first nut body 1 and the second nut body 5 .

[0028] The anti-rotation mechanism 2 is the mechanism of the nut itself, and the mechanism of the nut itself includes the protrusion 21 of the first nut body 1 and the groove 22 of the second nut body 5 that cooperate with each other, or the first nut body that cooperates with each other 1 and the protrusion of the second nut body 5.

[0029] Or, in another implementation, the nut itself mechanism includes the inner splines of the first nut body 1 and the outer splines of the second nut body 5 that cooperate with each other, or the outer splines of the first nut body 1 that c...

Embodiment 2

[0031] Such as Figure 2-4 As shown, an anti-backlash nut structure includes a first nut body 1 and a second nut body 5, and an inner constriction that can provide radial contraction force is provided between the first nut body 1 and the second nut body 5. Assemblies, an anti-rotation mechanism 2 for preventing the nut from rotating is also provided between the first nut body 1 and the second nut body 5 .

[0032] The anti-rotation mechanism 2 is an external increasing mechanism. Said external augmentation mechanism includes at least one rigid part. Described rigid part can adopt parts such as pin.

[0033] More preferably, there are three rigid parts, which are evenly distributed between the first nut body 1 and the second nut body 5 .

[0034] The anti-rotation mechanism 2 is a mechanism with a positioning function, so that the retractable components are evenly distributed, so that the pushing force on the entire nut is uniform, and the nut is prevented from being asymmet...

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Abstract

The invention relates to a gap eliminating nut structure. The gap eliminating nut structure comprises a first nut body (1) and a second nut body (5), wherein an inward contraction component capable of providing radial contraction force is arranged between the first nut body (1) and the second nut body (5), and an anti-rotation mechanism (2) used for preventing a nut from rotating is further arranged between the first nut body (1) and the second nut body (5). Compared with the prior art, the gap eliminating nut structure has the advantages that the service life of the nut can be effectively prolonged, the situation that when the nut is used, the anti-rotation mechanism is broken due to too large torque is avoided and the like.

Description

technical field [0001] The invention relates to a nut structure, in particular to a backlash-eliminating nut structure. Background technique [0002] As the basic power transfer unit of linear motion, the screw nut pair has great demand in various fields. However, as the degree of precision becomes higher and higher, especially for motion control systems, the gap between the nut and the screw, and the gap caused by the wear of the nut after running for a period of time, resulting in the position value error of the commutation, increasingly becoming a problem that cannot be ignored. [0003] How to design the anti-backlash nut becomes a crucial point. [0004] Conventional axial anti-backlash nuts on the market are mostly segmented, connected to the lead nut in the axial direction through a spring, and the spring provides axial push-pull force to make the nut overcome the load to achieve anti-backlash. However, this solution will make the spring force unable to overcome th...

Claims

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Application Information

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IPC IPC(8): F16H25/20F16H25/24
CPCF16H25/2003F16H25/24
Inventor 张栋曾凯吴志敢
Owner SHANGHAI MOONS ELECTRICAL APPLIANCE