A sustainable gap eliminating nut

Abstract

The present application relates to a kind of sustainable gap eliminating nut, including the first nut body (1) with the elastic force that can provide and guide function, the second nut body (2) with anti-rotation and guide function and screw rod (3), the first nut body (1) and the second nut body (2) are pre-tightening assembly, then, with screw rod (3) assembly.Compared with prior art, the present application has the advantages of avoiding the deformation of spring and achieving the effect of eliminating gap.

Description

TECHNICAL FIELD

[0001] The present application relates to a nut, in particular to a sustainable gap elimination nut. BACKGROUND

[0002] The existing slotted type gap elimination nut is mainly divided into two types according to the principle: radial gap elimination and axial gap elimination. Both of them are composed of a nut and a spring. The nut is pre-tightened by the contraction of the spring. However, the existing mechanism is mainly determined by two factors, and the effect of gap elimination cannot be achieved without one of them.

[0003] 1. Elastic system: that is, the spring device must have good elastic ability and not easy to have permanent deformation. The selection of spring is very important. Different application scenarios require different materials of spring, which has certain influence on design selection.

[0004] 2. Whether the nut material is easy to deform.

[0005] In actual use, it is found that the existing gap elimination nut fails to achieve the effect of gap elimination because the radial component force is greater than the elastic force provided by the spring. Therefore, how to solve the problem that the existing gap elimination nut fails to achieve the effect of gap elimination because the radial component force is greater than the elastic force provided by the spring has become a technical problem to be solved. SUMMARY

[0006] The purpose of the present application is to overcome the defects of the prior art and provide a sustainable gap elimination nut.

[0007] The purpose of the present application can be achieved by the following technical solutions:

[0008] According to one aspect of the present application, a sustainable gap elimination nut is provided, which comprises a first nut body having a function of providing elastic force and guiding, a second nut body having a function of preventing rotation and guiding, and a screw rod. The first nut body and the second nut body are pre-tightened and assembled first, and then assembled with the screw rod.

[0009] As a preferred technical solution, the first nut body comprises an integral base and a three-petal structure.

[0010] As a preferred technical solution, a connecting structure is arranged between the base and the three-petal structure.

[0011] As a preferred technical solution, the connecting structure comprises a circular arc structure near the base and a slope structure near the three-petal structure.

[0012] Preferably, the length of the connecting structure a, the radius of the arc structure Rx and the slope angle of the slope structure b satisfy 0.5mm≤a≤6mm, 5°≤b≤60° and 0.5mm≤Rx≤6mm.

[0013] Preferably, the three-petal structure is provided with a guide groove.

[0014] Preferably, the depth c of the guide groove satisfies 0.2mm≤c≤3mm.

[0015] Preferably, the second nut body is provided with a plate rib mechanism corresponding to the guide groove.

[0016] Preferably, the plate rib mechanism adopts an inclined surface structure, and the slope angle d° satisfies 1°≤d°≤20°.

[0017] Preferably, the slope angle d° further satisfies 1°≤d°≤8°.

[0018] Compared with the prior art, the present application has the following advantages:

[0019] 1) The present application adopts a double-nut pre-tightening principle, and can realize axial gap elimination effect.

[0020] 2) The present application cancels the spring mechanism, increases the limiting function, avoids the situation that the radial component force of the nut is greater than the elastic force provided by the spring due to excessive load, and finally the nut is expanded and fails. The clamping groove of the first nut body has an anti-rotation function, and also plays a guiding and uniform contraction role, so as to achieve zero gap effect.

[0021] 3) The first nut body material of the present application has good elasticity, can freely deform, provides elastic force for the gap elimination mechanism, and further achieves the effect of eliminating the gap, which can avoid the situation that the spring cannot achieve the gap elimination effect due to deformation.

[0022] 4) The present application has high stability, the second nut body is designed with a slope mechanism, and with the change of the angle d°, the force can be uniformly decomposed in the axial and radial directions, and unilateral wear will not occur due to uneven force. The present application will not fail to achieve the gap elimination effect due to wear between the nut and the screw during use, and will continue to compensate.

[0023] 5) The present application has a limiting function, which can solve the problem that the existing gap elimination nut fails due to the radial component force being greater than the elastic force provided by the spring. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present application.

[0025] Figure 2 is a schematic diagram of the exploded structure of the present application;

[0026] Figure 3 is a schematic diagram of the perspective structure of the first nut body of the present application;

[0027] Figure 4 is a schematic diagram of the side view structure of the first nut body of the present application;

[0028] Figure 5 is a schematic diagram of the enlarged structure of A part of Figure 4 ;

[0029] Figure 6 is a schematic diagram of the top view structure of the first nut body of the present application;

[0030] Figure 7 is a sectional view of B-B direction of Figure 6 ;

[0031] Figure 8 is a schematic diagram of the structure of the second nut body of the present application;

[0032] Figure 9 is a schematic diagram of the top view structure of the second nut body of the present application;

[0033] Figure 10 is a sectional view of A-A direction of Figure 9 ;

[0034] Figure 11 is a schematic diagram of the mechanical analysis of the second nut body of the present application;

[0035] Wherein 1 is the first nut body, 2 is the second nut body, 3 is the screw rod, 11 is the base, 12 is the three-limb structure, 13 is the connecting structure, 131 is the circular arc structure, 132 is the slope structure, 121 is the guide groove, 21 is the plate rib mechanism. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0037] As Figures 1-2As shown, a sustainable gap-eliminating nut includes a first nut body 1 providing elasticity and guidance, a second nut body 2 providing anti-rotation and guidance, and a lead screw 3. The first nut body 1 and the second nut body 2 are pre-tightened before being assembled with the lead screw 3. This invention eliminates the gap between the nut and the lead screw, thus eliminating the need for the original spring mechanism.

[0038] like Figures 3-7 As shown, the first nut body 1 includes an integrally formed base 11 and a three-lobed structure 12. A connecting structure 13 is provided between the base 11 and the three-lobed structure 12. The connecting structure 13 includes an arc structure 131 near the base 11 and a ramp structure 132 near the three-lobed structure 12. The length of the connecting structure 13 is 'a', the radius of the arc structure 131 is 'Rx', and the angle of the ramp structure 132 is 'b'. The first nut body 1 uses a three-lobed structure, and a, b, and Rx determine the deformation of the three lobes of the nut. The values ​​of a, b, and Rx are in the following ranges: 0.5mm ≤ a ≤ 6mm, 5° ≤ b ≤ 60°, and 0.5mm ≤ Rx ≤ 6mm.

[0039] The three-lobed structure 12 is provided with a guide groove 121. The guide groove also plays an important role in the deformation of the nut. The depth c of the guide groove 121 is in the range of 0.2mm≤c≤3mm.

[0040] like Figures 8-10 As shown, the second nut body 2 is provided with a rib mechanism 21 corresponding to the guide groove 121, and the rib mechanism 21 has three parts. The rib mechanism 21 adopts an inclined plane structure to decompose the force axially and radially, thereby eliminating gaps. At the same time, the inner cylindrical surface can also serve as a limiting function, and the angle d° is determined by the actual nut specification used, with a range of d°: 1°≤d°≤20°. More preferably, the range of the angle d° is: 1°≤d°≤8°, which is specifically related to the load borne by the mechanism.

[0041] like Figure 11 As shown, during operation, the first nut body 1 provides a spring force perpendicular to the inclined plane to the second nut body 2, which is decomposed into two components: axial and radial. The axial component pre-tightens the first nut body 1 and the second nut body 2, achieving an automatic gap compensation effect. As the axial component d increases, the axial component F-axis also increases, resulting in a better gap elimination effect. Since the second nut body 2 has a limiting function, the radial component has virtually no effect on the nut. This solves the problem of existing gap-eliminating nuts failing because the radial component exceeds the spring force.

[0042] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements shall be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A sustainable backspacing nut, characterized in that, The utility model relates to a nut body assembly for screw rod, which comprises a first nut body (1) with elastic force and guiding function, a second nut body (2) with anti-rotation and guiding function and a screw rod (3), wherein the first nut body (1) and the second nut body (2) are pre-assembled and then assembled with the screw rod (3). The first nut body (1) comprises a base (11) and a three-piece structure (12) which are integrally formed, and a connecting structure (13) is arranged between the base (11) and the three-piece structure (12), wherein the connecting structure (13) comprises a circular arc structure (131) near the base (11) and a slope structure (132) near the three-piece structure (12), and the first nut body has good elasticity and can freely deform. The three-piece structure (12) is provided with a guiding groove (121), the depth c of the guiding groove (121) ranges from 0.2 mm to 3 mm, the second nut body (2) is provided with a plate rib mechanism (21) corresponding to the guiding groove (121), and the plate rib mechanism (21) adopts a slope structure with an inclination angle d ranging from 1° to 20°. During operation, the first nut body (1) provides a force perpendicular to the slope to the second nut body (2), which is decomposed into an axial force and a radial force, the axial force pre-tightens the first nut body (1) and the second nut body (2), thereby achieving the effect of automatically compensating for the gap, and the increase of d leads to the increase of the axial force F, thereby achieving a better gap compensation effect.

2. A sustainable backlash nut according to claim 1, wherein, The length a of the connecting structure (13), the radius Rx of the circular arc structure (131) and the inclination angle b of the slope structure (132) range from 0.5 mm to 6 mm, from 5° to 60° and from 0.5 mm to 6 mm, respectively.

3. A sustainable backlash nut as set forth in claim 1, wherein, The inclination angle d further ranges from 1° to 8°.

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