Self-tapping screw with scrap guiding-out structure

Abstract

The utility model relates to the field of self-tapping screws, in particular to a self-tapping screw with a scrap guiding-out structure. The self-tapping screw with the scrap guiding-out structure comprises a screw head, a connecting column and a screw rod, the connecting column is arranged at the bottom of the screw head, the screw rod is arranged at the bottom of the connecting column, and the screw head, the connecting column and the screw rod are integrally formed and designed. When a self-tapping screw conducts self-tapping drilling on a plate, the arc-shaped scraping plate can be driven to rotate clockwise, at the moment, chippings remaining on the surface of the plate can be guided out along the arc-shaped surface of the arc-shaped scraping plate, and therefore the effect of guiding out the chippings is achieved; when the self-tapping screw rotates downwards and is screwed on a plate, the arc-shaped scraping plate can be gradually contained in the containing groove along with downward movement of the self-tapping screw, and the spring is gradually contained in the annular mounting groove due to extrusion, so that normal use of the whole self-tapping screw is not affected while the structural strength of the screw head is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of self - tapping screws, in particular to a self - tapping screw with a waste chip discharging structure. Background Art

[0002] When a self - tapping screw rotates self - tapping on a board, the board chips generated by self - tapping will move upward along the thread groove of the screw and be discharged. However, the discharged board chips will accumulate between the screw head and the board contact surface. As a result, when the self - tapping screw is tightened, the board chips between the screw head and the board will affect the contact friction force between the screw head and the board, thereby affecting the fixing effect of the self - tapping screw. In view of the above situation, technological innovation is carried out on the basis of existing self - tapping screws. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a self - tapping screw with a waste chip discharging structure to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A self - tapping screw with a waste chip discharging structure, comprising:

[0005] A screw head, a connecting column and a screw rod. The connecting column is arranged at the bottom of the screw head, and the screw rod is arranged at the bottom of the connecting column. The screw head, the connecting column and the screw rod are integrally formed. Among them:

[0006] The bottom of the screw head is evenly provided with receiving grooves in a circular array. The receiving grooves penetrate the outer side wall of the screw head, and a chip discharging component is placed in the receiving grooves.

[0007] Preferably, the chip discharging component includes an arc - shaped scraping plate. Two groups of guiding grooves are evenly opened at the top of the arc - shaped scraping plate. A guiding column is arranged in the guiding grooves, and a spring is placed on the outer circle of the guiding column.

[0008] Preferably, the arc - shaped scraping plate is arranged in the receiving grooves at the bottom of the screw head, and the arc - shaped scraping plates are evenly distributed in a circular array on the outer side wall of the connecting column.

[0009] Preferably, the side of the arc - shaped scraping plate away from the connecting column is flush with the outer side wall of the screw head, and the side of the arc - shaped scraping plate close to the connecting column is in contact with the outer side wall of the connecting column.

[0010] Preferably, two groups of circular mounting grooves are evenly opened at the top of the arc - shaped scraping plate and the top of the inner side wall of the receiving groove at the bottom of the screw head respectively. The top of the spring is arranged at the top of the inner side wall of the circular mounting groove at the top of the inner side wall of the receiving groove at the bottom of the screw head, and the bottom of the spring is arranged at the top of the inner side wall of the circular mounting groove at the top of the arc - shaped scraping plate.

[0011] Preferably, the tops of the two groups of the guide posts are evenly arranged on the top of the inner side wall of the receiving groove at the bottom of the screw head.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] In the present utility model, when the self-tapping screw self-taps and drills holes in the board, it will drive the arc-shaped scraper to rotate clockwise. At this time, the debris staying on the surface of the board will be led outwards along the arc-shaped surface of the arc-shaped scraper, so as to achieve the effect of waste chip export;

[0014] When the self-tapping screw rotates downward and is tightened on the board, the arc-shaped scraper will gradually be received into the receiving groove as the self-tapping screw moves downward, and the spring will be gradually received into the annular installation groove of the receiving groove, so as to ensure the structural strength of the screw head while not affecting the normal use of the whole self-tapping screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural view of the self-tapping screw with a waste chip export structure of the present utility model;

[0016] Figure 2 is a partial front sectional view of the self-tapping screw with a waste chip export structure of the present utility model;

[0017] Figure 3 is a bottom sectional view of the self-tapping screw with a waste chip export structure of the present utility model.

[0018] In the figure: 1, screw head; 11, connecting column; 12, screw rod; 2, arc-shaped scraper; 21, guide groove; 22, annular installation groove; 23, spring; 24, guide post. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1 - 3, A self-tapping screw with a waste chip export structure, comprising a screw head 1, a connecting column 11 and a screw rod 12. The self-tapping screw is composed of the screw head 1, the connecting column 11 and the screw rod 12. The connecting column 11 is fixedly arranged at the bottom of the screw head 1, and the screw rod 12 is fixedly arranged at the bottom of the connecting column 11. The screw head 1, the connecting column 11 and the screw rod 12 are integrally formed. The bottom of the screw head 1 is evenly provided with receiving grooves in an annular array, and the receiving grooves penetrate the outer wall of the screw head 1. A chip removal component is placed in the receiving grooves. The chip removal component includes an arc-shaped scraper 2. Two groups of guiding grooves 21 are evenly arranged at the top of the arc-shaped scraper 2. A guiding column 24 is slidably arranged in the guiding grooves 21 to assist the arc-shaped scraper 2 to move up and down stably through the guiding column 24. A spring 23 is placed on the outer circle of the guiding column 24.

[0021] The arc-shaped scraper 2 is slidably arranged in the receiving groove at the bottom of the screw head 1. The arc-shaped scraper 2 is evenly distributed in an annular array on the outer wall of the connecting column 11. The side of the arc-shaped scraper 2 away from the connecting column 11 is flush with the outer wall of the screw head 1. The side of the arc-shaped scraper 2 close to the connecting column 11 is in contact with the outer wall of the connecting column 11. Two groups of annular installation grooves 22 are evenly arranged at the top of the arc-shaped scraper 2 and the inner wall top of the receiving groove at the bottom of the screw head 1 respectively. The top of the spring 23 is arranged at the inner wall top of the annular installation groove 22 at the inner wall top of the receiving groove at the bottom of the screw head 1. The bottom of the spring 23 is fixedly arranged at the inner wall top and bottom of the annular installation groove 22 at the top of the arc-shaped scraper 2. The tops of the two groups of guiding columns 24 are evenly fixedly arranged at the inner wall top of the receiving groove at the bottom of the screw head 1. When the self-tapping screw performs clockwise self-tapping drilling on the board, the generated board chips will move upward along the thread groove on the outer side of the screw rod 12 and be discharged. When the self-tapping screw continues to rotate downward and tighten, and the bottom of the arc-shaped scraper 2 is in contact with the top of the board, the self-elastic force of the spring 23 can ensure that the arc-shaped scraper 2 is in close contact with the board. The clockwise rotating screw will drive the arc-shaped scraper 2 to rotate clockwise. At this time, the chips staying on the board surface will be exported outward along the arc surface of the arc-shaped scraper 2, so as to achieve the effect of waste chip export. At the same time, when the self-tapping screw rotates downward and tightens on the board, the arc-shaped scraper 2 will gradually be received into the receiving groove as the self-tapping screw moves downward, and the spring 23 is gradually received into the annular installation groove 22 of the receiving groove under extrusion, so as to ensure the structural strength of the screw head 1 while not affecting the normal use of the whole self-tapping screw.

[0022] Working principle: The self-tapping screw is composed of a screw head 1, a connecting column 11 and a screw rod 12. When the self-tapping screw performs clockwise self-tapping drilling on the plate, the generated plate debris will move upward along the thread groove on the outer side of the screw rod 12 and be discharged. When the self-tapping screw continues to rotate downward and tighten, and the bottom of the arc-shaped scraper 2 is in contact with the top of the plate, the self-elastic force of the spring 23 can ensure that the arc-shaped scraper 2 is closely attached to the plate. The clockwise rotating screw will drive the arc-shaped scraper 2 to rotate clockwise. At this time, the debris remaining on the plate surface will be exported outward along the arc surface of the arc-shaped scraper 2, so as to achieve the effect of waste chip export. At the same time, when the self-tapping screw rotates downward and tightens on the plate, the arc-shaped scraper 2 will gradually be received into the receiving groove as the self-tapping screw moves downward, and the spring 23 will be gradually received into the annular installation groove 22 of the receiving groove under extrusion. In this way, while ensuring the structural strength of the screw head 1, it does not affect the normal use of the entire self-tapping screw.

Claims

1. Self-tapping screw with waste chip export structure, characterized in that Comprising: A screw head (1), a connecting column (11) and a screw rod (12), the connecting column (11) is arranged at the bottom of the screw head (1), the screw rod (12) is arranged at the bottom of the connecting column (11), and the screw head (1), the connecting column (11) and the screw rod (12) are integrally formed. Among them: A receiving groove is uniformly formed in a circular array at the bottom of the screw head (1), the receiving groove penetrates the outer side wall of the screw head (1), and a chip removal component is placed in the receiving groove.

2. The self-tapping screw with a waste chip discharging structure according to claim 1, wherein: The chip removal component includes an arc-shaped scraping plate (2), two groups of guiding grooves (21) are uniformly formed at the top of the arc-shaped scraping plate (2), a guiding column (24) is arranged in the guiding groove (21), and a spring (23) is placed on the outer ring of the guiding column (24).

3. The self-tapping screw with a waste chip discharging structure according to claim 2, wherein: The arc-shaped scraping plate (2) is arranged in the receiving groove at the bottom of the screw head (1), and the arc-shaped scraping plates (2) are uniformly distributed in a circular array on the outer side wall of the connecting column (11).

4. The self-tapping screw with a waste chip discharging structure according to claim 2, wherein: One side of the arc-shaped scraping plate (2) away from the connecting column (11) is flush with the outer side wall of the screw head (1), and one side of the arc-shaped scraping plate (2) close to the connecting column (11) is in contact with the outer side wall of the connecting column (11).

5. The self-tapping screw with a waste chip discharging structure according to claim 2, wherein: Two groups of annular mounting grooves (22) are uniformly formed at the top of the arc-shaped scraping plate (2) and the top of the inner side wall of the receiving groove at the bottom of the screw head (1) respectively. The top of the spring (23) is arranged at the top of the inner side wall of the annular mounting groove (22) at the top of the inner side wall of the receiving groove at the bottom of the screw head (1), and the bottom of the spring (23) is arranged at the top and bottom of the inner side wall of the annular mounting groove (22) at the top of the arc-shaped scraping plate (2).

6. The self-tapping screw with a waste chip discharging structure according to claim 2, characterized in that: The tops of the two groups of guiding columns (24) are uniformly arranged at the top of the inner side wall of the receiving groove at the bottom of the screw head (1).

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