CN218934967U

CN218934967U - Self-tapping screw

Info

Publication number: CN218934967U
Application number: CN202222829931.5U
Authority: CN
Inventors: 沈建丰
Original assignee: Jiaxing Fengcheng Hardware Material Co ltd
Current assignee: Jiaxing Fengcheng Hardware Material Co ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-04-28
Anticipated expiration: 2032-10-26

Abstract

The utility model discloses a self-tapping screw, which relates to the field of screws and comprises a screw head, wherein a screw rod is fixed in the middle of one side of the screw head, one end of the screw rod is fixedly provided with a screw tip, the outer side of the screw rod is sleeved with a sleeve, the top end of the sleeve is fixedly provided with a bonding plate, the bonding plate is bonded with one side of the screw head, one side edge of the bonding plate is fixedly provided with a dovetail sliding block, one side edge of the screw head is provided with a dovetail sliding groove, the dovetail sliding block is positioned in the dovetail sliding groove, and the inner side of the sleeve is connected with the screw rod through a limiting assembly. According to the anti-loosening device, the sleeve is arranged on the outer side of the screw and is connected with the screw through the limiting component, so that the screw can drive the sleeve to rotate when rotating clockwise, and the screw cannot drive the sleeve to rotate when rotating anticlockwise, so that the sleeve cannot be easily loosened when being screwed into an object, and the anti-loosening effect of the device is improved.

Description

Self-tapping screw

Technical Field

The utility model relates to the field of screws, in particular to a self-tapping screw.

Background

The screw is a tool for progressively fastening the machine parts by utilizing the physical and mathematical principles of the inclined plane circular rotation and friction force of the object; screws are a common way of speaking fasteners, daily spoken words.

At present, the common self-tapping screw is quite many, can attack by oneself under the condition of no pre-hole, but in the in-process of attacking, the resistance is great, and people can directly dismantle through the instrument in addition, even do not dismantle, also can loosen for a long time, are difficult to reach the requirement of certain product anti-loosening of preventing dismantling on special position. Therefore, it is necessary to invent a self-tapping screw to solve the above-mentioned problems.

Disclosure of Invention

The present utility model is directed to a self-tapping screw for solving the above-mentioned problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a self-tapping screw, includes the spiral shell head, one side middle part of spiral shell head is fixed with the screw rod, the one end of screw rod is fixed with the spiral shell point, the sleeve pipe has been cup jointed in the outside of screw rod, sheathed tube top is fixed with the laminating board, laminating board is laminated mutually with one side of spiral shell head, one side edge of laminating board is fixed with the forked tail slider, the forked tail spout has been seted up to one side edge of spiral shell head, the forked tail slider is located the inside of forked tail spout, sheathed tube inboard is connected with the screw rod through spacing subassembly.

Preferably, the limiting component comprises a plurality of grooves which are arranged on the outer side of the screw and distributed in an annular array, a movable stop block is arranged in the grooves, one end of the movable stop block is movably connected with the inner wall of the grooves through a pin shaft, and one protruding side of the movable stop block is provided with an arc-shaped surface.

Preferably, the inner side of the sleeve is fixedly provided with a plurality of convex blocks distributed in an annular array, the outer side surface of each convex block is provided with an arc-shaped structure, and the convex blocks correspond to the movable stop blocks.

Preferably, an inner hexagon is arranged in the middle of the other side of the screw head, and a cross groove is formed in the middle of the groove bottom of the inner hexagon.

The utility model has the technical effects and advantages that:

according to the anti-loosening device, the sleeve is arranged on the outer side of the screw and is connected with the screw through the limiting component, so that the screw can drive the sleeve to rotate when rotating clockwise, and the screw cannot drive the sleeve to rotate when rotating anticlockwise, so that the sleeve cannot be easily loosened when being screwed into an object, and the anti-loosening effect of the device is improved.

Drawings

FIG. 1 is a schematic cross-sectional view of the overall structure of the present utility model.

Fig. 2 is a schematic plan view of a limiting assembly according to the present utility model.

Fig. 3 is a schematic top view of the screw head structure of the present utility model.

In the figure: 1. a screw head; 2. a screw; 3. a screw tip; 4. a sleeve; 5. bonding plates; 6. dovetail slide blocks; 7. dovetail grooves; 8. a limit component; 9. a groove; 10. a movable stop block; 11. a bump; 12. an inner hexagon; 13. cross grooves.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model provides a self-tapping screw as shown in figures 1-3, which comprises a screw head 1, wherein a screw rod 2 is fixed in the middle of one side of the screw head 1, a screw tip 3 is fixed at one end of the screw rod 2, a sleeve 4 is sleeved outside the screw rod 2, an attaching plate 5 is fixed at the top end of the sleeve 4, the attaching plate 5 is attached to one side of the screw head 1, a dovetail sliding block 6 is fixed at one side edge of the attaching plate 5, a dovetail sliding groove 7 is formed at one side edge of the screw head 1, the dovetail sliding block 6 is positioned in the dovetail sliding groove 7, and the inner side of the sleeve 4 is connected with the screw rod 2 through a limiting component 8.

Specifically, spacing subassembly 8 is including seting up in a plurality of recess 9 that are annular array and distribute in the screw rod 2 outside, the inside of recess 9 is provided with movable dog 10, the one end of movable dog 10 is through the inner wall swing joint of round pin axle and recess 9, the convex one side of movable dog 10 sets up to the arcwall face, the inboard of sleeve pipe 4 is fixed with a plurality of lugs 11 that are annular array and distribute, the lateral surface of lug 11 is provided with arc structure, and lug 11 is corresponding with movable dog 10, hexagon in 12 has been seted up at the opposite side middle part of screw head 1, cross recess 13 has been seted up at the tank bottom middle part of hexagon in 12.

More specifically, the method comprises the steps of,

according to the anti-loosening device, the sleeve 4 is arranged on the outer side of the screw 2, and the sleeve 4 is connected with the screw 2 through the limiting component 8, so that the screw 2 can drive the sleeve 4 to rotate when rotating clockwise, and the screw 2 cannot drive the sleeve 4 to rotate when rotating anticlockwise, so that the sleeve 4 cannot be easily loosened when being screwed into an object, and the anti-loosening effect of the device is improved.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. Self-tapping screw, including spiral shell head (1), its characterized in that: screw rod (2) are fixed with in the middle part of one side of spiral shell head (1), the one end of screw rod (2) is fixed with spiral shell point (3), sleeve pipe (4) have been cup jointed in the outside of screw rod (2), the top of sleeve pipe (4) is fixed with laminating board (5), laminating board (5) laminate mutually with one side of spiral shell head (1), one side edge of laminating board (5) is fixed with forked tail slider (6), forked tail spout (7) have been seted up at one side edge of spiral shell head (1), forked tail slider (6) are located the inside of forked tail spout (7), the inboard of sleeve pipe (4) is connected with screw rod (2) through spacing subassembly (8).

2. A self-tapping screw as claimed in claim 1, wherein: the limiting assembly (8) comprises a plurality of grooves (9) which are formed in the outer side of the screw (2) and distributed in an annular array, movable check blocks (10) are arranged in the grooves (9), one ends of the movable check blocks (10) are movably connected with the inner walls of the grooves (9) through pin shafts, and one protruding side of each movable check block (10) is provided with an arc-shaped surface.

3. A self-tapping screw as claimed in claim 2, wherein: the inner side of the sleeve (4) is fixedly provided with a plurality of protruding blocks (11) distributed in an annular array, the outer side face of each protruding block (11) is provided with an arc-shaped structure, and the protruding blocks (11) correspond to the movable stop blocks (10).

4. A self-tapping screw as claimed in claim 3, wherein: an inner hexagon (12) is arranged in the middle of the other side of the screw head (1), and a cross groove (13) is formed in the middle of the groove bottom of the inner hexagon (12).