CN217761932U

CN217761932U - Clearance-eliminating nut structure with C-shaped spring

Info

Publication number: CN217761932U
Application number: CN202221517568.7U
Authority: CN
Inventors: 樊良彬; 张栋; 袁贵星; 周文峰
Original assignee: Shanghai Mingzhi Paibosi Automation Technology Co ltd
Current assignee: Shanghai Mingzhi Paibosi Automation Technology Co ltd
Priority date: 2022-06-16
Filing date: 2022-06-16
Publication date: 2022-11-08
Anticipated expiration: 2032-06-16

Abstract

The utility model relates to a clearance eliminating nut structure with a C-shaped spring, which is matched with a screw rod for use, the clearance eliminating nut structure comprises a nut body and the C-shaped spring, the nut body and the C-shaped spring are pre-tightened and assembled firstly and then are matched with the screw rod for use; the nut body is provided with a spring installation groove for assembling the C-shaped spring. Compared with the prior art, the utility model has the advantages of stability is good, the structure is succinct, easy operation.

Description

Clearance elimination nut structure with C-shaped spring

Technical Field

The utility model relates to a clearance nut structure disappears especially relates to a take clearance nut structure that disappears of C type spring.

Background

The existing gap eliminating nuts can be divided into two types: the radial clearance elimination and the axial clearance elimination are both composed of a spring and a nut.

The radial clearance eliminating nut has the working principle that the spring always provides radial force in the working process, and the radial force is converted into the axial direction through the tooth-shaped angle of the nut so as to achieve the effect of eliminating the clearance between the nut and the screw rod.

The axial clearance eliminating nut has the working principle that the spring directly provides axial force in the working process, and the clearance between the nut and the screw rod is eliminated through the axial force.

In the whole working process, the clearance eliminating effect of the nut is decisive by the spring,

aiming at the radial clearance eliminating nut, under some large-load application scenes, when the radial component force borne by the nut is larger, the existing coil spring type clearance eliminating nut cannot meet the application requirement, the coil spring generates deformation displacement when the coil spring is subjected to the radial load component force, but the original position cannot be recovered due to the coil spring winding use, so that the clearance eliminating effect of the nut is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a gap eliminating nut structure with a C-shaped spring in order to overcome the defects of the prior art.

The purpose of the utility model can be realized through the following technical scheme:

according to one aspect of the utility model, the clearance eliminating nut structure with the C-shaped spring is provided, the clearance eliminating nut structure is matched with the lead screw for use, the clearance eliminating nut structure comprises a nut body and the C-shaped spring, the nut body and the C-shaped spring are pre-tightened and assembled firstly, and then the nut body and the C-shaped spring are matched with the lead screw for use; the nut body is provided with a spring installation groove for assembling the C-shaped spring.

As a preferred technical scheme, the nut body is of a three-petal slotted structure and comprises a base and a three-petal structure, wherein the outer surface of the three-petal structure is provided with a spring mounting groove, and a connecting structure is arranged between the base and the three-petal structure.

As a preferable technical solution, the connecting structure includes an arc structure near the base end and a slope structure near the three-lobe structure, the length a of the connecting structure, the radius of the arc structure is Rx, and the oblique angle of the slope structure is b.

As a preferred technical scheme, the value ranges of a, b and Rx are as follows: a is more than or equal to 0.5mm and less than or equal to 9mm, b is more than or equal to 1 degree and less than or equal to 70 degrees, and Rx is more than or equal to 0.1mm and less than or equal to 8mm.

As a preferable technical scheme, the groove width C of the spring installation groove of the three-petal structure is slightly larger than the width of the C-shaped spring, and the groove depth of the spring installation groove of the three-petal structure is consistent with the thickness of the C-shaped spring.

Preferably, the width C of the slot of the spring mounting groove of the three-petal structure is 0.1mm larger than the width of the C-shaped spring.

As a preferable technical scheme, a plurality of spring installation grooves on the three-petal structure are arranged, and the number of the spring installation grooves is the same as that of the C-shaped springs.

As a preferable technical scheme, the inner diameter Re of the C-shaped spring is smaller than the outer diameter D of the adaptive section of the nut body, so that interference fit is realized.

Preferably, the width f of the C-shaped spring is 0.5-20 mm, the width h of the groove is 0.1- (Re/4) mm, and the thickness y is 0.1-3 mm.

As a preferable technical scheme, the C-shaped spring is a component obtained by heat treatment of stainless steel or a spring steel strip.

Compared with the prior art, the utility model has the advantages of it is following:

1) The utility model adopts the decomposition of the mechanical resultant force, and achieves the effect of eliminating the clearance axially by overcoming the radial force;

2) The utility model uses a similar C-shaped spring leaf mechanism, the spring of the structure solves the problem that the spring can not rebound under stress, can continuously provide a variable reaction force, and simultaneously has a limiting function to a certain extent;

3) The utility model discloses stability is good: according to the C-shaped spring clearance eliminating structure, when the nut is abraded, the spring can continuously contract to compensate, and the clearance is eliminated so as to achieve the effect of no clearance;

4) The utility model discloses the structure is succinct, easy operation: in the aspects of manufacturing and assembling the nut and the C-shaped spring, the nut and the C-shaped spring are easy to process and assemble.

Drawings

Fig. 1 is a schematic view of the assembled structure of the present invention;

fig. 2 is a left side view structure diagram after the utility model is assembled;

FIG. 3 is a schematic view of the explosion structure of the present invention;

fig. 4 is a schematic front view of the nut body of the present invention;

fig. 5 is a left side view structural schematic diagram of the nut body of the present invention;

FIG. 6 isbase:Sub>A schematic sectional view taken along line A-A of FIG. 4;

FIG. 7 is an enlarged view of the structure at point l in FIG. 6;

fig. 8 is a schematic front view of the nut body of the present invention;

fig. 9 is a schematic front view of the C-shaped spring of the present invention;

fig. 10 is a left side view schematic structure diagram of the C-shaped spring of the present invention;

wherein 1 is the nut body, 2 is C type spring, 11 is the base, 12 is three lamella structures, 13 is connection structure, 131 is the circular arc structure, 132 is the slope structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in fig. 1-3, a gap eliminating nut structure with a C-shaped spring, which is used in cooperation with a lead screw, includes a nut body 1 and a C-shaped spring 2, wherein the nut body 1 and the C-shaped spring 2 are assembled in a pre-tightening manner and then used in cooperation with the lead screw; the nut body 1 is provided with a spring installation groove for assembling the C-shaped spring 2.

As shown in fig. 4-8, the nut body 1 is a three-piece slotted structure, and includes a base 11 and a three-piece structure 12 having a spring installation groove on an outer surface thereof, and a connection structure 13 is provided between the base 11 and the three-piece structure 12.

The connecting structure 13 comprises an arc structure 131 near the base 11 end and a slope structure 132 near the three-petal structure 12, the length a of the connecting structure 13, the radius of the arc structure 131 is Rx, and the oblique angle of the slope structure 132 is b. a. b and Rx determine the deformation of the three lobes of the nut, and further preferably, the value ranges of a, b and Rx are as follows: a is more than or equal to 0.5mm and less than or equal to 9mm, b is more than or equal to 1 degree and less than or equal to 70 mm, and Rx is more than or equal to 0.1mm and less than or equal to 8mm.

The spring mounting groove on the three-petal nut also plays an important role in changing the nut type, the slotting width C of the spring mounting groove of the three-petal structure 12 is slightly larger than the width of the C-shaped spring 2, and the slotting depth of the spring mounting groove of the three-petal structure 12 is consistent with the thickness of the C-shaped spring 2. More preferably, the groove width C of the spring mounting groove of the three-petal structure 12 is 0.1mm larger than the width of the C-shaped spring 2.

A plurality of spring mounting grooves are formed in the three-petal structure 12, and the number of the spring mounting grooves is the same as that of the C-shaped springs 2. Further preferably, the number may be two,

as shown in fig. 9-10, the inner diameter Re of the C-shaped spring 2 is smaller than the outer diameter D of the fitting section of the nut body, so that interference fit is realized. The width f of the C-shaped spring is 0.5-20 mm, the width h of the groove is 0.1- (Re/4) mm, and the thickness y is 0.1-3 mm. The C-shaped spring is made of stainless steel, spring steel strips and the like, the effect of the spring can be achieved by utilizing heat treatment, and meanwhile, the C-shaped spring has certain rigidity and elasticity.

The working principle is as follows:

in the operation process, C type spring directly provides radial contractile force to the nut, offsets the radial component force of load to the nut, can confirm the use number of spring according to nut length, can make the clearance effect that disappears reach better, so far, adopts the utility model relates to a structure can solve the problem that the nut became invalid.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The clearance eliminating nut structure with the C-shaped spring is matched with a lead screw for use, and is characterized by comprising a nut body (1) and the C-shaped spring (2), wherein the nut body (1) and the C-shaped spring (2) are assembled in a pre-tightening mode and then matched with the lead screw for use; the nut body (1) is provided with a spring installation groove for assembling the C-shaped spring (2).

2. The clearance-eliminating nut structure with the C-shaped spring as claimed in claim 1, wherein the nut body (1) is a three-petal slotted structure, and comprises a base (11) and a three-petal structure (12) with a spring mounting groove on the outer surface, and a connecting structure (13) is arranged between the base (11) and the three-petal structure (12).

3. The gap-eliminating nut structure with a C-shaped spring as claimed in claim 2, characterized in that said connecting structure (13) comprises a circular arc structure (131) near the base (11) end and a slope structure (132) near the three-lobe structure (12), the length a of said connecting structure (13), the radius of said circular arc structure (131) is Rx, and the oblique angle of said slope structure (132) is b.

4. The gap-eliminating nut structure with the C-shaped spring as claimed in claim 3, wherein the value ranges of a, b and Rx are as follows: a is more than or equal to 0.5mm and less than or equal to 9mm, b is more than or equal to 1 degree and less than or equal to 70 mm, and Rx is more than or equal to 0.1mm and less than or equal to 8mm.

5. The clearance-eliminating nut structure with the C-shaped spring as claimed in claim 2, characterized in that the slot width C of the spring installation groove of the three-petal structure (12) is slightly larger than the width of the C-shaped spring (2), and the slot depth of the spring installation groove of the three-petal structure (12) is consistent with the thickness of the C-shaped spring (2).

6. The gap-eliminating nut structure with the C-shaped spring as claimed in claim 2, characterized in that the width C of the slot of the spring mounting groove of the three-petal structure (12) is 0.1mm larger than the width of the C-shaped spring (2).

7. The clearance-eliminating nut structure with the C-shaped spring as claimed in claim 2, characterized in that the number of the spring installation grooves on the three-petal structure (12) is the same as the number of the C-shaped springs (2).

8. The structure of the gap-eliminating nut with the C-shaped spring as claimed in claim 1, characterized in that the inner diameter Re of the C-shaped spring (2) is smaller than the outer diameter D of the adaptive section of the nut body, so that interference fit is realized.

9. The gap-eliminating nut structure with C-shaped spring as claimed in claim 3, characterized in that the width f of the C-shaped spring (2) is 0.5-20 mm, the slot width h is 0.1- (Re/4) mm, and the thickness y is 0.1-3 mm.

10. The structure of the gap-eliminating nut with the C-shaped spring as claimed in claim 1, characterized in that the C-shaped spring (2) is a component obtained by heat treatment of stainless steel or a spring steel strip.