High strength press-in screw

Abstract

The utility model provides a high -strength pressure riveting screw relates to pressure riveting screw field, include: the cap mechanism, the cap mechanism includes hex head, the top of hex head is connected with the bottom of first tooth block fixedly, the top of cap mechanism is provided with anti -drop mechanism, the anti -drop mechanism includes connecting boss, the bottom of connecting boss is connected with the top of second tooth block fixedly, the top of cap mechanism is provided with screw rod mechanism, screw rod mechanism includes stud. The utility model, first tooth block inserts the inside of board material, and the board material is subjected to extrusion and occurs plastic deformation simultaneously, and the deformed board material is inserted between fixed boss and connecting boss, and second tooth block inserts the inside of board material, reaches the effect of bidirectional torsional resistance through clockwise inclined first tooth block and counterclockwise inclined second tooth block, and the stability of screw whole in high frequency vibration working environment after installation is increased.

Description

Technical Field

[0001] This utility model relates to the field of press-fit screw technology, and in particular to a high-strength press-fit screw. Background Technology

[0002] Press-fit screws are fasteners that achieve a tight connection with sheet metal through a press-fit process. Their core feature is that they do not require pre-tapping. They rely on the mechanical force during press-fitting to cause plastic deformation of the sheet metal, which forms a tight engagement with the screw's teeth or thread structure. They are suitable for metal sheets with a thickness of 1mm or more and are widely used in automobile manufacturing, electronic equipment, engineering machinery, aerospace and other fields.

[0003] In the existing technology, most press-fit screws use a few traditional single-row straight teeth to mesh with the deformed plate to increase torsional resistance. However, single-row straight teeth can only achieve unidirectional torsional resistance, and the torsional resistance effect is not good. In high-frequency vibration working environment, the screw is prone to loosening. Utility Model Content

[0004] The purpose of this utility model is to provide a high-strength press-fit screw to solve the problem mentioned in the background art that a single row of straight teeth can only achieve unidirectional torsion resistance, and the torsion resistance effect is not good, and the screw is prone to loosening in high-frequency vibration working environment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: including a cap-pressing mechanism, wherein the cap-pressing mechanism includes a hexagonal head, the top of the hexagonal head is fixedly connected to the bottom of the first tooth block, the top of the cap-pressing mechanism is provided with an anti-detachment mechanism, the anti-detachment mechanism includes a connecting boss, the bottom of the connecting boss is fixedly connected to the top of the second tooth block, and the top of the cap-pressing mechanism is provided with a screw mechanism, the screw mechanism including a stud.

[0006] In a preferred embodiment, the top of the hexagonal head is fixedly connected to the bottom of the fixed boss, the outer wall of the fixed boss is fixedly connected to one side of the first tooth block, the first tooth block is an inclined trapezoidal shape, and the first tooth block is inclined in a clockwise direction, and multiple sets of the first tooth blocks are provided.

[0007] In a preferred embodiment, the top of the fixed boss is fixedly connected to the bottom of the connecting block, and the hexagonal head, the fixed boss, the first tooth block and the connecting block are all integrally formed by cold forging.

[0008] In a preferred embodiment, the top of the hexagonal head is provided with a first sealing groove, and the inner wall of the first sealing groove is fixedly connected to the outer wall of the first nitrile rubber sealing ring.

[0009] In a preferred embodiment, the top of the connecting block is fixedly connected to the bottom of the connecting boss, and the outer wall of the connecting block is fixedly connected to one side of the second tooth block, wherein the second tooth block is configured as an inclined trapezoidal shape.

[0010] In a preferred embodiment, the second tooth block is inclined in a counterclockwise direction, and multiple sets of the second tooth block are provided. The outer wall of the connecting boss is provided with a first sealing groove, and the inner wall of the first sealing groove is fixedly connected to the outer wall of the second nitrile rubber sealing ring. The connecting block, the connecting boss and the second tooth block are all integrally formed by cold forging.

[0011] In a preferred embodiment, the top of the connecting boss is fixedly connected to the bottom of the stud, and the outer wall of the stud is formed with a press-fit thread by cold rolling.

[0012] In a preferred embodiment, the bottom outer wall of the press-fit thread is fixedly connected to one side of the reinforcing plate, the bottom of the reinforcing plate is fixedly connected to the top of the connecting boss, and the connecting boss, stud and reinforcing plate are all integrally formed by cold heading.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, the first tooth block is embedded inside the plate, and the plate is subjected to compression to undergo plastic deformation. The deformed plate is embedded between the fixing boss and the connecting boss. At the same time, the second tooth block is embedded inside the plate. Through the clockwise tilting of the first tooth block and the counterclockwise tilting of the second tooth block, the bidirectional anti-torsional force is achieved, which increases the stability of the screw after installation in a high-frequency vibration working environment.

[0014] 2. In this utility model, the first nitrile rubber sealing ring is compressed and contacts the outer wall of the plate, while the outer wall of the connecting boss fits into the deformed plate, so that the second nitrile rubber sealing ring is compressed and fits into the plate. Through the deformation of the second nitrile rubber sealing ring under compression, the first nitrile rubber sealing ring and the second nitrile rubber sealing ring respectively fill the gap between the hexagonal head and the connecting boss and the plate, thereby increasing the sealing effect after the screw is installed and reducing the ingress of external liquids.

[0015] 3. In this utility model, the deformed plate portion allows part of the first sealing groove to be embedded in the plate. Through the setting of multiple sets of reinforcing plates, the strength of the stud root is ensured, and the possibility of breakage at the connection is reduced. Attached Figure Description

[0016] Figure 1 A structural schematic diagram of a high-strength press-fit screw provided by this utility model; Figure 2 A schematic diagram of a high-strength press-fit screw cap mechanism provided by this utility model; Figure 3 A schematic diagram of the anti-loosening mechanism of a high-strength press-fit screw provided by this utility model after being flipped over; Figure 4 A schematic diagram of the screw mechanism of a high-strength press-fit screw provided by this utility model.

[0017] Legend: 1. Cap pressing mechanism; 101. Hexagonal head; 102. Fixing boss; 103. First toothed block; 104. Connecting block; 105. First sealing groove; 106. First nitrile rubber sealing ring; 2. Anti-detachment mechanism; 201. Connecting boss; 202. Second toothed block; 203. First sealing groove; 204. Second nitrile rubber sealing ring; 3. Screw mechanism; 301. Stud; 302. Press-fit thread; 303. Reinforcing plate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-4 This utility model provides a technical solution including: a cap pressing mechanism 1, the cap pressing mechanism 1 including a hexagonal head 101, the top of the hexagonal head 101 being fixedly connected to the bottom of the first tooth block 103, the top of the cap pressing mechanism 1 being provided with an anti-detachment mechanism 2, the anti-detachment mechanism 2 including a connecting boss 201, the bottom of the connecting boss 201 being fixedly connected to the top of the second tooth block 202, and the top of the cap pressing mechanism 1 being provided with a screw mechanism 3, the screw mechanism 3 including a stud 301.

[0020] In one embodiment, the top of the hexagonal head 101 is fixedly connected to the bottom of the fixing boss 102, the outer wall of the fixing boss 102 is fixedly connected to one side of the first tooth block 103, the first tooth block 103 is in the shape of an inclined trapezoid and is inclined in a clockwise direction, and multiple sets of the first tooth blocks 103 are provided. The top of the fixing boss 102 is fixedly connected to the bottom of the connecting block 104. The hexagonal head 101, the fixing boss 102, the first tooth block 103 and the connecting block 104 are all integrally formed by cold forging. The top of the hexagonal head 101 is provided with a first sealing groove 105, the inner wall of the first sealing groove 105 is fixedly connected to the outer wall of the first nitrile rubber sealing ring 106, the top of the connecting block 104 is fixedly connected to the bottom of the connecting boss 201, and the outer wall of the connecting block 104 is fixedly connected to one side of the second tooth block 202, the second tooth block 202 is in the shape of an inclined trapezoid.

[0021] Specifically: When riveting screws to sheet metal, screws are placed inside the mounting grooves in the sheet metal. The hexagonal head 101 is pressed by a riveting machine, causing the first tooth block 103 to embed into the sheet metal. At the same time, the sheet metal is compressed and undergoes plastic deformation. The deformed sheet metal is embedded between the fixing boss 102 and the connecting boss 201. Meanwhile, the second tooth block 202 is embedded into the sheet metal. The clockwise tilting of the first tooth block 103 and the counterclockwise tilting of the second tooth block 202 achieves bidirectional anti-torsional force, increasing the overall stability of the screw after installation in a high-frequency vibration working environment.

[0022] In one embodiment, the second tooth block 202 is tilted in a counterclockwise direction, and multiple sets of the second tooth block 202 are provided. The outer wall of the connecting boss 201 is provided with a first sealing groove 203, and the inner wall of the first sealing groove 203 is fixedly connected to the outer wall of the second nitrile rubber sealing ring 204. The connecting block 104, the connecting boss 201 and the second tooth block 202 are all integrally formed by cold forging.

[0023] Specifically: the first nitrile rubber sealing ring 106 is compressed and contacts the outer wall of the plate, while the outer wall of the connecting boss 201 fits against the deformed plate, causing the second nitrile rubber sealing ring 204 to be compressed and fit against the plate. Through the deformation of the second nitrile rubber sealing ring 204 under compression, the first nitrile rubber sealing ring 106 and the second nitrile rubber sealing ring 204 respectively fill the gap between the hexagonal head 101 and the connecting boss 201 and the plate, thereby increasing the sealing effect after the screw is installed and reducing the ingress of external liquids.

[0024] In one embodiment, the top of the connecting boss 201 is fixedly connected to the bottom of the stud 301, the outer wall of the stud 301 is formed with a press-fit thread 302 by cold rolling, the bottom outer wall of the press-fit thread 302 is fixedly connected to one side of the reinforcing plate 303, the bottom of the reinforcing plate 303 is fixedly connected to the top of the connecting boss 201, and the connecting boss 201, the stud 301 and the reinforcing plate 303 are all integrally formed by cold heading.

[0025] Specifically, the deformed plate portion allows part of the first sealing groove 203 to embed into the plate, ensuring the strength of the stud 301 root and reducing the possibility of breakage at the connection.

[0026] Working principle: When riveting screws to a plate, the screw is placed inside the mounting groove in the plate. The hexagonal head 101 is pressed by the riveting machine, causing the first nitrile rubber sealing ring 106 to be squeezed and contact the outer wall of the plate. This causes the first toothed block 103 to embed into the plate. At the same time, the plate undergoes plastic deformation due to the compression. The deformed plate is embedded between the fixing boss 102 and the connecting boss 201. Meanwhile, the second toothed block 202 is embedded into the plate. The outer wall of the connecting boss 201 is in contact with the deformed plate, causing the second nitrile rubber sealing ring 204 to be squeezed and in contact with the plate. The deformed plate portion causes part of the first sealing groove 203 to be embedded in the plate.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A high-strength press-fit screw, characterized in that, include: The cap pressing mechanism (1) includes a hexagonal head (101), the top of which is fixedly connected to the bottom of the first tooth block (103). The cap pressing mechanism (1) is provided with an anti-detachment mechanism (2) at the top. The anti-detachment mechanism (2) includes a connecting boss (201), the bottom of which is fixedly connected to the top of the second tooth block (202). The cap pressing mechanism (1) is provided with a screw mechanism (3) at the top. The screw mechanism (3) includes a stud (301).

2. The high-strength press-fit screw according to claim 1, characterized in that: The top of the hexagonal head (101) is fixedly connected to the bottom of the fixed boss (102). The outer wall of the fixed boss (102) is fixedly connected to one side of the first tooth block (103). The first tooth block (103) is an inclined trapezoidal shape and is inclined in a clockwise direction. Multiple sets of the first tooth block (103) are provided.

3. A high-strength press-fit screw according to claim 2, characterized in that: The top of the fixed boss (102) is fixedly connected to the bottom of the connecting block (104). The hexagonal head (101), the fixed boss (102), the first tooth block (103) and the connecting block (104) are all integrally formed by cold forging.

4. A high-strength press-fit screw according to claim 3, characterized in that: The top of the hexagonal head (101) is provided with a first sealing groove (105), and the inner wall of the first sealing groove (105) is fixedly connected to the outer wall of the first nitrile rubber sealing ring (106).

5. A high-strength press-fit screw according to claim 4, characterized in that: The top of the connecting block (104) is fixedly connected to the bottom of the connecting boss (201), and the outer wall of the connecting block (104) is fixedly connected to one side of the second tooth block (202), which is set in an inclined trapezoidal shape.

6. A high-strength press-fit screw according to claim 5, characterized in that: The second tooth block (202) is inclined in a counterclockwise direction, and multiple sets of the second tooth block (202) are provided. The outer wall of the connecting boss (201) is provided with a first sealing groove (203), and the inner wall of the first sealing groove (203) is fixedly connected to the outer wall of the second nitrile rubber sealing ring (204). The connecting block (104), the connecting boss (201) and the second tooth block (202) are all integrally formed by cold forging.

7. A high-strength press-fit screw according to claim 1, characterized in that: The top of the connecting boss (201) is fixedly connected to the bottom of the stud (301), and the outer wall of the stud (301) is formed with a press-fit thread (302) by cold rolling.

8. A high-strength press-fit screw according to claim 7, characterized in that: The bottom outer wall of the press-fit thread (302) is fixedly connected to one side of the reinforcing plate (303), and the bottom of the reinforcing plate (303) is fixedly connected to the top of the connecting boss (201). The connecting boss (201), stud (301) and reinforcing plate (303) are all integrally formed by cold heading.

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