阅读说明：本技术 防松脱的自攻螺丝 (Anti-loose self-tapping screw ) 是由 赵小兵 于 2021-09-14 设计创作，主要内容包括：本发明公开了一种防松脱的自攻螺丝,包括：管状螺丝件；自攻螺丝件,所述管状螺丝件长度小于所述自攻螺丝件长度,所述自攻螺丝件穿设于所述管状螺丝件内；单向锁紧机构,所述单向锁紧机构分别安装于所述管状螺丝件内壁靠近头部位置、以及所述自攻螺丝件靠近螺帽位置；其中,所述管状螺丝件的螺丝丝纹角度与所述自攻螺丝件的螺丝丝纹角度不相同。(The invention discloses a self-tapping screw for preventing loosening, which comprises: a tubular screw member; the length of the tubular screw piece is smaller than that of the self-tapping screw piece, and the self-tapping screw piece is arranged in the tubular screw piece in a penetrating mode; the one-way locking mechanism is respectively arranged at the position, close to the head, of the inner wall of the tubular screw piece and at the position, close to the nut, of the self-tapping screw piece; the thread angle of the tubular screw piece is different from that of the self-tapping screw piece.)

1. A self-tapping screw that locking takes off which characterized in that includes:

a tubular screw member (1);

the length of the tubular screw piece (1) is smaller than that of the self-tapping screw piece (2), and the self-tapping screw piece (2) is arranged in the tubular screw piece (1) in a penetrating mode;

the one-way locking mechanism (3) is respectively arranged at the position, close to the head, of the inner wall of the tubular screw piece (1) and at the position, close to the nut, of the self-tapping screw piece (2);

the thread angle of the tubular screw piece (1) is different from that of the self-tapping screw piece (2).

2. A self-tapping screw which is resistant to loosening according to claim 1, characterised in that the thread angle of the tubular screw element (1) and the thread angle of the self-tapping screw element (2) are both between 0-180 ° but not including 90 °.

3. A self-tapping screw preventing loosening according to claim 1, characterised in that the head of the tubular screw member (1) is provided with a slotted or cross-shaped recess.

4. A self-tapping screw which is resistant to loosening according to claim 1, characterised in that said one-way locking mechanism (3) comprises:

the wedge-shaped locking blocks (31) are circumferentially arranged on the inner wall of the tubular screw piece (1) close to the head;

the self-tapping screw is characterized by comprising a plurality of limiting lugs (32), wherein the limiting lugs (32) are circumferentially arranged at the position, close to a nut, of the self-tapping screw (2), and the limiting lugs (32) are arranged in equal quantity in the wedge-shaped locking block (31).

5. A self-tapping screw which is resistant to loosening according to claim 4, characterised in that the angle of inclination of the wedge-shaped locking block (31) is between 4-6 °.

6. A self-tapping screw preventing loosening according to claim 4, characterised in that said limiting protrusions (32) are arranged close to the inclined end of said wedge locking block (31) when said self-tapping screw piece (2) is turned clockwise.

7. A self-tapping screw which is resistant to loosening according to claim 1, characterised in that the tubular screw member (1) is provided with a tail portion which is of a converging type.

8. The anti-loose self-tapping screw as claimed in claim 1, wherein the thread angle of the tubular screw member (1) is 0 ° or 180 °, a removable filling body is filled in the tubular screw member (1), and an inclined opening for facilitating implantation is formed at the tail of the tubular screw member (1).

Technical Field

The invention relates to the technical field of self-tapping screws, in particular to an anti-loosening self-tapping screw.

Background

The screw is a tool for fastening the parts of the object step by utilizing the physics and mathematical principles of the inclined plane circular rotation and the friction force of the object; screws are a common term for fasteners, a common spoken word.

At present, conventional and common self-tapping screws are quite a lot and can be self-tapped without pre-holes, but in the tapping process, the resistance is large, people can directly detach the self-tapping screws through tools, even if the self-tapping screws are not detached, the self-tapping screws can also loosen after a long time, and the requirement that certain products are prevented from being detached and loosened on special positions is difficult to achieve.

Disclosure of Invention

In order to achieve the above object, the present invention discloses a self-tapping screw for preventing loosening, comprising:

a tubular screw member;

the length of the tubular screw piece is smaller than that of the self-tapping screw piece, and the self-tapping screw piece is arranged in the tubular screw piece in a penetrating mode;

the one-way locking mechanism is respectively arranged at the position, close to the head, of the inner wall of the tubular screw piece and at the position, close to the nut, of the self-tapping screw piece;

the thread angle of the tubular screw piece is different from that of the self-tapping screw piece.

Preferably, the thread angle of the tubular screw member and the thread angle of the self-tapping screw member are both between 0 ° and 180 °, but not including 90 °.

Preferably, the head of the tubular screw piece is provided with a straight groove or a cross groove.

Preferably, the one-way locking mechanism includes:

the wedge-shaped locking blocks are circumferentially arranged on the inner wall of the tubular screw piece, close to the head;

the limiting lugs are circumferentially arranged at the positions, close to the screw caps, of the self-tapping screws, and the limiting lugs are arranged on the wedge-shaped locking blocks in equal quantity.

Preferably, the inclination angle of the wedge-shaped locking block is between 4 and 6 degrees.

Preferably, when the self-tapping screw piece rotates clockwise, the limiting lug is close to the inclined end of the wedge-shaped locking block.

Preferably, the tail part of the tubular screw piece is arranged in a closing-in manner.

Preferably, the screw thread angle of the tubular screw piece is 0 degree or 180 degrees, a filler which can be taken out is filled in the tubular screw piece, and an inclined opening which is convenient to implant is formed in the tail of the tubular screw piece.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a first perspective view of the tubular screw member of the present invention;

FIG. 3 is a perspective view of a tapping screw member according to the present invention;

FIG. 4 is a perspective view of the present invention;

FIG. 5 is a cross-sectional view of a tubular screw member according to the present invention;

FIG. 6 is a perspective view of a second tubular screw member of the present invention.

In the figure: 1. a tubular screw member; 2. a self-tapping screw member; 3. a one-way locking member; 31. a wedge-shaped locking block; 32. and a limiting bump.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

The invention will be further described with reference to the accompanying drawings.

As shown in fig. 1 to 5, the present embodiment provides a self-tapping screw with anti-loosening function, including:

a tubular screw member 1;

the length of the tubular screw piece 1 is smaller than that of the self-tapping screw piece 2, and the self-tapping screw piece 2 is arranged in the tubular screw piece 1 in a penetrating mode;

the one-way locking mechanism 3 is respectively arranged at the position, close to the head, of the inner wall of the tubular screw piece 1 and at the position, close to the nut, of the self-tapping screw piece 2;

the thread angle of the tubular screw piece 1 is different from that of the self-tapping screw piece 2.

In one embodiment, the thread angle of the tubular screw element 1 and the thread angle of the self-tapping screw element 2 are both between 0 and 180 °, but not including 90 °. It is noted that, unlike the conventional definition of the thread angle (i.e., the lead angle perpendicular to the plane of the central axis), the thread angle of the tubular screw member 1 is defined as the lead angle of the thread helix with respect to the central axis of the tubular screw member 1. Similarly, the thread angle of the tapping screw 2 is also the same.

In one embodiment, the head of the tubular screw member 1 is provided with a straight groove or a cross-shaped groove.

In one embodiment, the one-way locking mechanism 3 comprises:

the wedge-shaped locking blocks 31 are circumferentially arranged on the inner wall of the tubular screw part 1 close to the head;

the limiting lugs 32 are circumferentially arranged at the positions, close to the screw caps, of the self-tapping screws 2, and the limiting lugs 32 are arranged on the wedge-shaped locking blocks 31 in equal quantity.

In one embodiment, the wedge shaped locking block 31 has an angle of inclination between 4-6 °.

In one embodiment, when the tapping screw 2 is rotated clockwise, the limit protrusion 32 is disposed near the inclined end of the wedge locking block 31.

In one embodiment, the tubular screw member 1 is provided with a tail portion in a convergent manner.

The working principle and the beneficial effects of the invention are as follows:

the invention discloses a loose-proof self-tapping screw, after drilling by a pistol, under the action of a straight line or a cross, a tubular screw 1 is implanted into a hole by utilizing a straight line groove or a cross groove, the screw thread of the tubular screw 1 is meshed with the hole wall, the self-tapping screw 2 penetrates into the tubular screw 1, a limit lug 32 is positioned between adjacent wedge-shaped locking blocks 31, the self-tapping screw 2 is clockwise rotated, the self-tapping screw 2 is drilled into the hole, when the self-tapping screw 2 is clockwise rotated, the limit lug 32 is attached to the inclined end of the wedge-shaped locking block 31, the self-tapping screw 2 is screwed into the hole in the tubular screw 1 by utilizing the elastic expansion amount of the wedge-shaped locking blocks 31, the screw thread of the tubular screw 1 is meshed with the hole, and double-screw threads are meshed in the hole due to the fact that the screw thread angle of the tubular screw 1 is different from the screw thread angle of the self-tapping screw 2, thereby the effect of once locking taking off has been played, and because self tapping screw spare 2 when clockwise turning, spacing lug 32 pastes the slope end of locating wedge-shaped latch segment 31, like this when self tapping screw spare 2 anticlockwise turning, the straight flange end of wedge-shaped latch segment 31 is located to spacing lug 32 card, causes self tapping screw spare 2 anticlockwise unable realization anticlockwise turning to the effect of secondary locking taking off has been played.

As shown in fig. 6, the present embodiment further provides a loose-proof self-tapping screw, including:

a tubular screw member 1;

the length of the tubular screw piece 1 is smaller than that of the self-tapping screw piece 2, and the self-tapping screw piece 2 is arranged in the tubular screw piece 1 in a penetrating mode;

the one-way locking mechanism 3 is respectively arranged at the position, close to the head, of the inner wall of the tubular screw piece 1 and at the position, close to the nut, of the self-tapping screw piece 2;

the thread angle of the tubular screw piece 1 is different from that of the self-tapping screw piece 2.

In one embodiment, the thread angle of the tubular screw member 1 is 0 ° or 180 °, a removable filling body is filled in the tubular screw member 1, and an oblique opening for facilitating implantation is formed at the tail of the tubular screw member 1.

The working principle and the beneficial effects of the technical scheme are as follows:

the invention also discloses an anti-loose self-tapping screw, wherein the tubular screw piece 1 is implanted in a rotating way without a special tool, after the bevel opening is pressed against a target object, the tubular screw member 1 is vertically implanted (the tubular screw member 1 is hammered into a target object by a hammer and other tools), the screw thread angle of the tubular screw member 1 is 0 degree or 180 degrees, the rotation of the tubular screw member 1 in the target object is limited, after the implantation is finished, the filling body in the tubular screw member 1 is taken out, the self-tapping screw member 2 is inserted into the tubular screw member 1, the screw thread angle of the tubular screw piece 1 is 0 degree or 180 degrees, so that the rotation of the tubular screw piece 1 in a target object is limited, the loosening of the self-tapping screw piece 2 needs to be reversely rotated, the reverse rotation of the self-tapping screw piece 2 in the tubular screw piece 1 is limited by the one-way locking mechanism 3, and the loosening prevention effect is finally achieved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.