Self-tapping screw

Abstract

The utility model relates to the technical field of self-tapping screws, in particular to a self-tapping screw which comprises a self-tapping head portion, a thread portion and a drill tail portion, one end of the self-tapping head portion is fixedly connected with the drill tail portion through the thread portion, sliding grooves are formed in the two sides of the thread portion and the two sides of the drill tail portion, and positioning mechanisms are installed on the outer sides of the sliding grooves. A conical bump is fixedly welded in the middle of the top end of the drill tail part; the positioning mechanism comprises a first annular plate, an internal clamping mechanism is rotationally connected into the first annular plate, one end of the first annular plate is fixedly connected with a second annular plate through an elastic plate, a middle groove is formed in one side of the middle of the elastic plate, and an anti-skid groove is formed in the end, away from the elastic plate, of the second annular plate. When the self-tapping screw is applied to a position with a narrow space and a smooth mounting surface, the self-tapping screw and the mounting surface are always kept perpendicular to each other, so that the problem that the self-tapping screw slips in the mounting process can be effectively avoided, and the stability of the self-tapping screw in the mounting process can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to self -tapping screw technical field, concretely is a self -tapping screw. BACKGROUND

[0002] Self -tapping screw, also called self -drilling screw or self -tapping screw, is a fastener that can be self -tapping into material without pre -drilling,

[0003] This screw is designed for various materials, such as wood, plastic, metal and even concrete, is widely used in building, furniture assembly, electronic equipment fixation etc. field, the thread design of self -tapping screw makes it can create thread when screwing, simplifies the installation process, improves work efficiency, they have high tensile and shear strength, are suitable for occasions needing firm fixation, in addition, the environmental protection design of self -tapping screw reduces the damage to material, is an economic and environmental protection fastening solution,

[0004] When installing the position of small space and smooth mounting surface through self -tapping screw, if the self -tapping screw appears the problem of inclination in the initial drilling and tapping, will lead to skidding, influence the drilling and tapping of self -tapping screw, therefore, aiming at the above -mentioned problem, a self -tapping screw is provided. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a self -tapping screw to solve the problem that when installing the position of small space and smooth mounting surface through self -tapping screw, if the self -tapping screw appears the problem of inclination in the initial drilling and tapping, will lead to skidding, influence the drilling and tapping of self -tapping screw.

[0006] To achieve the above -mentioned purpose, the utility model provides the following technical scheme:

[0007] A self -tapping screw, including self -tapping screw head, thread part and drill tail part, the one end of self -tapping screw head is fixedly connected with drill tail part through thread part, the both sides of thread part and drill tail part are all set up with sliding slot, the outside of sliding slot is installed with positioning mechanism, the top end of drill tail part is fixedly connected with conical convex point in the middle, the positioning mechanism includes first ring plate, the inside rotation is connected with inside jamming mechanism in first ring plate, one end is fixedly connected with second ring plate through elastic plate in first ring plate, the middle side of elastic plate is set up with middle slot, the end away from elastic plate of second ring plate is set up with antiskid groove, the outside of second ring plate is fixedly connected with pad.

[0008] As the further optimization of the utility model, wherein: the sliding slot is set up with two, the sliding slot is parallel between the sliding slot, the inside fixedly connected with sliding block in sliding ring, the sliding block is arranged in the sliding slot.

[0009] As the further optimization of the utility model, wherein: the first ring plate outer side is connected with the sliding ring, the first ring plate and the second ring plate are parallel, the first ring plate, the sliding ring and the second ring plate are the same axial center.

[0010] As the further optimization of the utility model, wherein: the anti-skid groove is provided with multiple, the anti-skid groove is annular and equidistantly distributed in the inner side of one end of the second ring plate.

[0011] As the further optimization of the utility model, wherein: the second ring plate and the spacer plate are set on the same horizontal plane away from the one end of the elastic plate, and the vertical projection size of the spacer plate and the self-tapping screw head is equal.

[0012] As the further optimization of the utility model, wherein: the elastic plate is provided with multiple, the elastic plate is annular and equidistantly distributed between the first ring plate and the second ring plate, the vertical section of the middle groove is triangular, and the middle groove is provided on the one end of the elastic plate close to the drill tail.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] In the utility model, the second ring plate and the spacer plate are arranged, so that when the self-tapping screw is applied to a narrow space and a smooth installation surface, the self-tapping screw and the installation surface can be kept perpendicular, the problem of slipping during the installation of the self-tapping screw can be effectively avoided, the stability during the automatic screw installation can be improved, and after the installation of the self-tapping screw is completed, the spacer plate cooperates with the elastic plate to form a gasket, and the stability after the installation of the self-tapping screw is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is an overall structure schematic view of the utility model;

[0016] Figure 2 It is a sliding groove opening position structure schematic view of the utility model;

[0017] Figure 3 It is a positioning mechanism structure schematic view of the utility model;

[0018] Figure 4 It is an internal jamming mechanism structure schematic view of the utility model.

[0019] In the drawing: 1, self-tapping screw head; 2, thread part; 3, drill tail; 4, conical convex point;

[0020] 5, positioning mechanism; 51, first ring plate;

[0021] 52, internal jamming mechanism; 521, sliding ring; 522, sliding block;

[0022] 53, elastic plate; 54, second ring plate; 55, anti-skid groove; 56, pad; 57, middle groove;

[0023] 6, sliding groove. DETAILED DESCRIPTION

[0024] 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 only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a presence of a feature, step, operation, device, component and / or combination thereof.

[0026] Please refer to Figures 1-4 The present application provides a technical solution:

[0027] A self-tapping screw, comprising a self-tapping head 1, a threaded portion 2 and a drill tail portion 3, the self-tapping head 1 is fixedly connected with the drill tail portion 3 through the threaded portion 2, the threaded portion 2 and the drill tail portion 3 are both provided with a sliding groove 6 on both sides, the sliding groove 6 is provided with a positioning mechanism 5 on the outside, the drill tail portion 3 is welded with a conical protrusion 4 in the middle of the top end; the positioning mechanism 5 comprises a first ring plate 51, the first ring plate 51 is rotatably connected with an internal jamming mechanism 52, the first ring plate 51 is fixedly connected with a second ring plate 54 through an elastic plate 53 at one end, the elastic plate 53 is provided with a middle groove 57 on one side in the middle, the second ring plate 54 is provided with an anti-skid groove 55 at one end away from the elastic plate 53, and the second ring plate 54 is fixedly connected with a pad 56 on the outside.

[0028] As a further implementation of the present scheme, two sliding grooves 6 are provided, and the sliding grooves 6 are parallel to each other, and the internal jamming mechanism 52 comprises a sliding ring 521, the sliding ring 521 is fixedly connected with a sliding block 522 on the inside, and the sliding block 522 is arranged inside the sliding groove 6. Through the above arrangement, the internal jamming mechanism 52 can be stably limited to ensure the stability of the internal jamming mechanism 52 during sliding;

[0029] As a further implementation of the present scheme, the first ring plate 51 is slidably connected with the sliding ring 521, the first ring plate 51 and the second ring plate 54 are parallel, the first ring plate 51, the sliding ring 521 and the second ring plate 54 have the same axis, and through the above arrangement, the stability of the positioning mechanism 5 during use can be ensured.

[0030] As a further implementation of the present scheme, the anti-skid groove 55 is provided with a plurality of anti-skid grooves, and the anti-skid grooves 55 are annularly and equidistantly distributed on the inner side of one end of the second ring plate 54, and through the above arrangement, the stability of the self-tapping screw during tapping can be improved.

[0031] As a further implementation of the present scheme, the second ring plate 54 and the spacer plate 56 are arranged on the same horizontal plane away from one end of the elastic plate 53, and the vertical projection size of the spacer plate 56 and the self-tapping screw head 1 is equal, and through the above arrangement, when the elastic plate 53 is bent, the spacer plate 56 is formed, and the stability of the self-tapping screw after installation is improved.

[0032] As a further implementation of the present scheme, the elastic plate 53 is provided with a plurality of elastic plates 53, and the elastic plates 53 are annularly and equidistantly distributed between the first ring plate 51 and the second ring plate 54, and the vertical section of the middle groove 57 is triangular, and the middle groove 57 is arranged at one end of the elastic plate 53 close to the drill tail 3, and through the above arrangement, the elastic plate 53 can be stably bent.

[0033] Work flow: when the self-tapping screw is used to install in a small space and a smooth installation surface, the drill tail 3 is tightly attached to the second ring plate 54 and the spacer plate 56 is tightly attached to the drilling surface, then the self-tapping screw head 1 is rotated at high speed through the tool control, and then the self-tapping screw is installed on the smooth position, in the process of tapping, the first ring plate 51 can right the self-tapping screw as a whole through the anti-skid groove 55 and the spacer plate 56, and the stability during tapping can be ensured, and through the tapered convex point 4, the positioning during tapping can be further performed, and in the process of tapping, the second ring plate 54 moves along the sliding groove 6 to the self-tapping screw head 1, at the same time, the elastic plate 53 is bent and accommodated in the position between the spacer plate 56 and the self-tapping screw head 1, and a gasket is formed to improve the stability of the self-tapping screw after installation.

[0034] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A self-tapping screw comprising a self-tapping head (1), a threaded portion (2) and a drill tail portion (3), characterized in that: The self-tapping head (1) is fixedly connected with the drill tail (3) through the threaded part (2), the threaded part (2) and the drill tail (3) are provided with the sliding groove (6) on both sides, the positioning mechanism (5) is installed outside the sliding groove (6), the conical convex point (4) is welded and fixed at the top of the drill tail (3). The positioning mechanism (5) comprises a first ring plate (51), the first ring plate (51) is rotatably connected with an internal jamming mechanism (52), one end of the first ring plate (51) is fixedly connected with a second ring plate (54) through an elastic plate (53), a middle slot (57) is formed in one side of the middle of the elastic plate (53), an anti-skid groove (55) is formed in the end of the second ring plate (54) away from the elastic plate (53), and the second ring plate (54) is fixedly connected with a backing plate (56) outside.

2. A self-aughting screw as defined in claim 1, wherein: The sliding groove (6) is provided with two, the sliding grooves (6) are parallel, the internal jamming mechanism (52) comprises a sliding ring (521), the sliding ring (521) is fixedly connected with a sliding block (522) inside, and the sliding block (522) is arranged inside the sliding groove (6).

3. A self-aughting screw as defined in claim 1, wherein: The first ring plate (51) is slidably connected with the sliding ring (521), the first ring plate (51) and the second ring plate (54) are parallel, and the first ring plate (51), the sliding ring (521) and the second ring plate (54) are coaxial.

4. A self-aughting screw as defined in claim 1, wherein: The anti-skid groove (55) is provided with a plurality of, the anti-skid grooves (55) are annularly and equidistantly distributed inside the end of the second ring plate (54).

5. A self-aughting screw as defined in claim 1, wherein: The end of the second ring plate (54) and the backing plate (56) away from the elastic plate (53) is arranged on the same horizontal plane, and the vertical projection size of the backing plate (56) and the self-tapping head (1) is equal.

6. A self-aughting screw as defined in claim 1, wherein: The elastic plate (53) is provided with a plurality of, the elastic plates (53) are annularly and equidistantly distributed between the first ring plate (51) and the second ring plate (54), the vertical section of the middle slot (57) is triangular, and the middle slot (57) is arranged at the end of the elastic plate (53) close to the drill tail (3).

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