CN202251361U

CN202251361U - Anti-slip screw

Info

Publication number: CN202251361U
Application number: CN2011203520457U
Authority: CN
Inventors: 王勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-09-20
Filing date: 2011-09-20
Publication date: 2012-05-30
Anticipated expiration: 2021-09-20

Abstract

The utility model discloses an anti-slip screw. The anti-slip screw is an improvement of a standard screw so as to achieve the effect of preventing slip and increasing the pretightening force. The anti-slip screw has the advantages of simplicity in assembly and reliability in use, and consists of a screw cap and a screw rod. In order to realize the anti-slip function, first grooves are uniformly arranged at the bottom of the screw cap; in order to ensure that the screw can be matched with a screw hole in a better manner and play the role of guiding and positioning when in use, one end of the screw rod relative to the screw cap is machined to be cone-shaped; and moreover, a second groove is machined at the center of an end face of the bottom of the screw rod, and can be used for storing scrap iron in use, so that the scrap iron can be prevented from wearing screw threads.

Description

Anti-skid screw

Technical field

The utility model relates to a kind of screw, is specifically related to a kind of anti-skid screw.

Background technique

When adopting plain screw to be fastenedly connected at present, need to adopt plain cushion or cushion to carry out anti-skidding.But adopt the anti-skidding of this mode, assembling is complicated, and expense is higher.In the patent No. is the patent document of ZL 200520113461, disclose a kind of anti-skid screw, this anti-skid screw is that the end with respect to screw cap is processed with cleat on screw rod, thereby prevents skidding between nut and screw thread.But this kind anti-skid screw processed complex, cost is higher.

Summary of the invention

In view of this, the utility model provides a kind of anti-skid screw.This anti-skid screw improves to standard screws, can reach effect anti-skidding and the increase pretightening force, and assembling is simple, uses reliable.

Anti-skid screw is made up of nut and screw rod two-part, and the screw rod cross section is circular.In order to realize anti-slip function, be processed with first groove more than two in the nut bottom, first groove can be clockwise or counter clockwise direction.When guaranteeing nut intensity, the degree of depth of first groove is 0.3mm-1mm, and first groove can be evenly or uneven distribution.

For screw is better matched with tapped hole in use, play the effect of guide-localization simultaneously, an end of the relative nut of screw rod is processed into taper, the length of tapering part is 0.5 times of screw nominal diameter.From the initial position of tapering part to tapering part 2/3 the thread external diameter evenly reduce, the reduction rule is that the every increase of length 1mm diameter reduces 0.1-0.3mm; From tapering part 2/3 to screw rod end machining screw not, and screw diameter die-offs, the reduction rule is that the every 1mm diameter of the every increase of length reduces 0.7-1.1mm.

Be processed with second groove at screw rod bottom end face center, second groove is preferably circular trough or vee gutter, can store iron filings in use, prevents that the iron filings double thread from causing wearing and tearing.

In order to make the screw skidproof effect better, prevent the connection dislocation between the screw thread, also can the screw rod cross section be processed into triangle, place, said leg-of-mutton three angles all adopts arc transition.

Beneficial effect

The anti-skid screw of the utility model is that standard screws is improved; Process first groove more than two in the nut bottom; And an end of the relative nut of screw rod is processed into taper; Thereby reach effect anti-skidding and the increase pretightening force, screw can better be matched with tapped hole in use, play the effect of guide-localization.The processing of this anti-skid screw is easy, can prevent the dislocation in the assembly process and skids; Assembling is simple, at the bottom of the cost, uses reliable.Second groove of screw rod bottom end face can prevent the wearing and tearing that the iron filings double thread causes effectively.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Structural representation when Fig. 2 is triangle for the screw rod cross section.

Wherein, 1-nut, 2-screw rod, 3-first groove, 4-second groove.

Embodiment

Below in conjunction with the accompanying drawing embodiment that develops simultaneously, the utility model is described in detail.

The utility model provides a kind of anti-skid screw, and is as shown in Figure 1.This anti-skid screw is on the M5 of standard screw, to improve, thereby reaches effect anti-skidding and the increase pretightening force.

Anti-skid screw is made up of nut 1 and screw rod 2 two-part.In order to realize anti-slip function, be evenly equipped with first groove 3 of inclination in nut 1 bottom, groove 3 is a scalloped recess, the tilt angle is 100 °.For the convenience of processing, first groove 3 adopts the mode of even malleation to form, and the height of first groove 3 is 0.5mm.

In order to make the screw in use can be better fastening, play the effect of guide-localization simultaneously, an end of screw rod 2 relative nuts is processed into taper.In the present embodiment, adopt the screw of M5, then the length of screw rod 2 terminal tapering parts is 2.5mm.From the initial position of tapering part to tapering part 2/3 the thread external diameter evenly reduce, the reduction rule is that the every increase of length 1mm diameter reduces 0.125mm; From tapering part 2/3 to screw rod end machining screw not, and screw diameter die-offs, the reduction rule is that the every 1mm diameter of the every increase of length reduces 0.8mm.

Have the second circular groove 4 at screw rod 2 bottom end face centers, can store iron filings in use, prevent the wearing and tearing of iron filings double thread.

Fig. 2 is the another kind of structure of the utility model anti-skid screw, and the cross section of its screw rod 2 is a triangle, and has all adopted arc transition at place, leg-of-mutton three angles.Have leg-of-mutton second groove 4 at screw rod 2 bottom end face centers.All the other structures are identical with anti-skid screw shown in Figure 1, do not repeating.

In sum, more than being merely the preferred embodiment of the utility model, is not the protection domain that is used to limit the utility model.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.

Claims

1. anti-skid screw comprises nut (1) and screw rod (2), it is characterized in that, is processed with first groove (3) more than two in said nut (1) bottom.

2. anti-skid screw as claimed in claim 1 is characterized in that, with said screw rod (2) relatively an end of nut (1) be processed into taper.

3. anti-skid screw as claimed in claim 1 is characterized in that, said screw rod (2) bottom end face center is processed with second groove.

4. anti-skid screw as claimed in claim 1 is characterized in that, said screw rod (2) cross section is circle or triangle, and when adopting triangular cross section, the place all adopts arc transition at leg-of-mutton three angles.

5. like claim 1,2,3 or 4 described anti-skid screws, it is characterized in that the degree of depth of said first groove (3) is 0.3mm-1mm.

6. like claim 1,2,3 or 4 described anti-skid screws, it is characterized in that the even or uneven distribution of said first groove (3).

7. like claim 1,2,3 or 4 described anti-skid screws, it is characterized in that said first groove (3) is clockwise or counter clockwise direction.

8. anti-skid screw as claimed in claim 2; It is characterized in that; The length of said tapering part is 0.5 times of screw nominal diameter, from the initial position of tapering part to tapering part 2/3 the thread external diameter evenly reduce, the reduction rule is that the every increase of length 1mm diameter reduces 0.1-0.3mm; From tapering part 2/3 to screw rod bottom machining screw not, and screw diameter die-offs, the reduction rule is that the every 1mm diameter of the every increase of length reduces 0.7-1.1mm.

9. anti-skid screw as claimed in claim 3 is characterized in that, said second groove is circular trough or vee gutter.