Stainless steel cross countersunk head screw

Abstract

The utility model discloses a stainless steel cross countersunk head screw, which relates to the countersunk head screw device field, and comprises a housing, the upper end position inside the housing is provided with an internal thread, the lower surface of the housing is fixedly provided with a drilling disc, the outer side surface of the drilling disc is provided with an inclined plane, the inclined plane is fixedly provided with drilling thorns, and the drilling thorns are fixedly arranged on the drilling disc. A drilling disc is fixedly installed on the lower surface of the shell, drilling thorns are fixedly installed on the lower surface of the drilling disc and distributed on the lower surface of the drilling disc in an array mode, a screw rod is installed in the shell, a connecting column is fixedly installed at the upper end of the screw rod, a nut is fixedly installed on the upper surface of the connecting column, and a crushing blade is fixedly installed at the position, close to the lower end, of the screw rod. By means of the shell, the drilling disc and the drilling thorns, the problems that installation is inconvenient due to the fact that no drilling tool exists in household use, tapping is protected, and gaps are formed in tapping due to mutual collision in the transportation process are solved.

Description

Technical Field

[0001] This utility model relates to the field of countersunk screw devices, and particularly to stainless steel Phillips head countersunk screws. Background Technology

[0002] Countersunk screws, also known as flathead screws or flathead bolts, have a conical bottom, similar to common screws. The top has a tool tightening groove, and they come in various shapes such as slotted, Phillips, and hexagonal. Generally, a circular countersunk hole is machined into the connector, and the top of the countersunk screw is flush with the surface of the connector. Because the head and the countersunk hole fit tightly, and the top is basically flush with the mounting surface after installation, the installation effect is better, and the finished product is more aesthetically pleasing. They are commonly used in the processing of furniture, boards, etc.

[0003] Currently, before countersunk screws can be connected to connectors, countersunk holes need to be drilled in the connectors using a drilling tool. Professional installers have all the necessary tools and equipment, but most home users do not have drilling tools, which causes inconvenience to the installation. In addition, during the transportation of countersunk screws, the taps installed on them may collide with each other, causing the taps to become chipped, which in turn makes it difficult to drive them into the connectors.

[0004] Therefore, it is necessary to propose stainless steel Phillips head countersunk screws to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a stainless steel Phillips head countersunk screw to solve the problems mentioned in the background art. Existing countersunk screws require drilling countersunk holes in the connector before connection, which is inconvenient for professional installers who have the necessary tools, but most home users lack such tools. Furthermore, during transportation, the taps on the countersunk screws may collide, causing gaps in the taps and making it difficult to drive them into the connector.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a stainless steel Phillips countersunk screw, including a housing, an internal thread at the upper end of the housing, a drill plate fixedly installed on the lower surface of the housing, an inclined surface on the outer surface of the drill plate, drill spikes fixedly installed on the inclined surface, and drill spikes fixedly installed on the lower surface of the drill plate, the drill spikes being arrayed on the lower surface of the drill plate;

[0007] A screw is installed inside the outer shell. A connecting post is fixedly installed at the upper end of the screw. A nut is fixedly installed on the upper surface of the connecting post. A crushing blade is fixedly installed near the lower end of the screw. The lower end of the screw has a tapered design.

[0008] An upper tap is fixedly installed on the outer surface of the screw. The upper tap is spiral in shape and a check valve is fixedly installed on the upper tap.

[0009] Preferably, the outer surface of the connecting column is provided with an external thread, which engages with the internal thread on the outer shell.

[0010] Preferably, the nut has a cross-shaped groove, and the cross-shaped groove is provided with anti-slip patterns. Multiple anti-slip patterns are provided and are evenly distributed in the cross-shaped groove at equal intervals.

[0011] Preferably, a chip removal groove is provided below the upper tapping screw, and six chip removal grooves are provided, which are symmetrically distributed in a circle on the screw. A chip collection cavity is provided in the chip removal groove, and a rising arc surface is formed at the top of the chip removal groove.

[0012] Preferably, a tapping screw is installed above the breaking blade.

[0013] Preferably, four crushing blades are provided, symmetrically distributed in a circle on the screw, and the crushing blades are located near the lower end of the screw, not flush with the lower end of the screw.

[0014] Preferably, the diameter of the drill bit is the same as the diameter of the nut.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] 1. The outer shell, drilling disc, and drilling serrated spikes provided in this utility model allow for the following process: Place the drilling disc at the desired drilling location, insert a screwdriver into the Phillips head groove, and rotate the screwdriver clockwise. The drilling serrated spikes then drill a hole in the surface of the connector. After drilling the hole, rotate the screwdriver counterclockwise to separate the outer shell from the nut. Pulling the outer shell upwards allows for the installation of the countersunk screw. Furthermore, the outer shell protects the tapping screws during transport, preventing collisions and ensuring proper insertion. This solves the problems of inconvenience caused by the lack of drilling tools in home use and the potential for tapping defects during transport, which can lead to difficulty in insertion when connecting to the connector.

[0017] 2. The anti-return blade, chip groove, and chip collection cavity provided in this utility model can collect the dust and debris generated during tapping into the chip collection cavity through the chip groove during use, thereby reducing the dust and debris generated during installation and protecting the respiratory health of users. At the same time, the anti-return blade can effectively lock into the connector. The design of the anti-return blade in the opposite direction to the upper tapping screw prevents the connector from loosening and enhances the bonding force between the countersunk screw and the connector. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the stainless steel Phillips countersunk screw of this utility model;

[0019] Figure 2 This is an exploded view of the stainless steel Phillips countersunk screw of this utility model;

[0020] Figure 3 This is a schematic diagram of the screw rod of the stainless steel Phillips countersunk screw of this utility model;

[0021] Figure 4 This utility model relates to stainless steel Phillips countersunk screws. Figure 4 Enlarged view of point A in the middle;

[0022] Figure 5 This is a bottom view of the housing of the stainless steel Phillips countersunk screw of this utility model;

[0023] In the diagram: 1. Outer shell; 2. Drilling disc; 3. Nut; 4. Cross groove; 5. Anti-slip texture; 6. Connecting post; 7. External thread; 8. Screw; 9. Upper tap; 10. Check valve; 11. Internal thread; 12. Chip removal groove; 13. Chip collection cavity; 14. Rising arc surface; 15. Lower tap; 16. Breaking blade; 17. Bevel; 18. Drilling thorn. Detailed Implementation

[0024] This utility model provides stainless steel Phillips head countersunk screws; please refer to the appendix. Figure 1 -Appendix Figure 3 As shown, it includes a housing 1, and an internal thread 11 is provided at the upper part of the interior of the housing 1.

[0025] Furthermore, a screw 8 is installed inside the outer casing 1, and a connecting post 6 is fixedly installed at the upper end of the screw 8. A nut 3 is fixedly installed on the upper surface of the connecting post 6, forming a complete transmission and force application structure. When the tool acts on the nut 3, the rotational force is transmitted to the screw 8 through the connecting post 6, so as to screw the screw in or out.

[0026] Specifically, the outer surface of the connecting post 6 is provided with an external thread 7, which meshes with the internal thread 11 on the outer shell 1.

[0027] Specifically, the nut 3 has a cross-shaped groove 4, and the cross-shaped groove 4 is provided with anti-slip texture 5. There are multiple anti-slip textures 5, which are evenly distributed at equal intervals in the cross-shaped groove 4. This increases the friction between the screwdriver and the nut 3. When tightening the screw, the screwdriver is less likely to slip off the nut 3, which improves the safety and accuracy of operation, reduces the probability of installation or disassembly failure due to operation errors, and at the same time reduces the risk of damage to surrounding parts due to operation errors.

[0028] Furthermore, an upper tap 9 is fixedly installed on the outer surface of the screw 8. The upper tap 9 is spiral in shape, and a check valve 10 is fixedly installed on the upper tap 9.

[0029] It should be noted that the spiral direction of the upper tap 9 is opposite to that of the anti-return blade 10, which prevents the screw from loosening and retracting. In a vibrating environment, it can effectively prevent ordinary screws from loosening due to vibration, improve the reliability of the screw connection, and reduce the workload of frequent inspection and re-tightening of screws from a long-term use perspective.

[0030] Furthermore, a chip removal groove 12 is provided below the upper tapping screw 9. There are six chip removal grooves 12, which are symmetrically distributed in a circle on the screw 8. A chip collection cavity 13 is provided inside the chip removal groove 12. A rising arc surface 14 is formed at the top of the chip removal groove 12. The design of the rising arc surface 14 is conducive to guiding the chips smoothly into the chip removal groove 12 and the chip collection cavity 13, thereby further improving the chip removal efficiency.

[0031] Please see the appendix Figure 4 As shown, a crushing blade 16 is fixedly installed near the lower end of the screw 8. The lower end of the screw 8 has a conical design, and four crushing blades 16 are symmetrically distributed on the screw 8 in a circle. The crushing blades 16 are located near the lower end of the screw 8, but are not flush with the lower end of the screw 8. The crushing blades 16 can perform preliminary crushing of materials, reduce the resistance of screw screwing, and improve installation efficiency. At the same time, the crushing blades 16 are not flush with the lower end of the screw 8. This design allows the screw to be positioned by the conical lower end first during the screw screwing process, and then the crushing operation is performed by the crushing blades 16, ensuring the accuracy and stability of screw screwing. This design can reduce energy consumption during the installation process and improve work efficiency.

[0032] Furthermore, a tap 15 is installed above the breaker blade 16, which further enhances the cutting ability when the screw is screwed in.

[0033] Please see the appendix Figure 5 As shown, a drilling disc 2 is fixedly installed on the lower surface of the outer casing 1. An inclined surface 17 is provided on the outer surface of the drilling disc 2, and drilling spikes 18 are fixedly installed on the inclined surface 17. Drilling spikes 18 are fixedly installed on the lower surface of the drilling disc 2. The drilling spikes 18 are distributed in an array on the lower surface of the drilling disc 2. When installing screws, the drilling disc 2 can pre-drill holes in the connected parts without the need for additional drilling tools, thus simplifying the installation process.

[0034] Specifically, the bevel 17 design on the outer surface of the drilling disc 2 helps the drilling disc 2 to cut into the material more smoothly and reduces resistance. The design of the drilling disc 2 shortens the installation time and improves the overall installation progress.

[0035] Specifically, the diameter of the drill plate 2 is the same as the diameter of the nut 3. After the drill plate 2 has finished drilling, the nut 3 can just cover the drilled position, making the top flush with the mounting surface, resulting in a better installation effect and a more aesthetically pleasing finished product.

[0036] In addition, the screws are made of stainless steel, which has good corrosion resistance. In humid or corrosive environments, they can maintain stable performance compared to screws made of ordinary materials, reducing damage and replacement frequency caused by corrosion, and lowering usage costs. At the same time, stainless steel is recyclable and reusable, which is in line with the concept of environmental protection.

[0037] When using the screwdriver, place the drill bit 2 at the desired drilling position, then insert the screwdriver into the Phillips head groove 4 and turn the screwdriver clockwise. The drill bit 18 will then drill a hole in the surface of the connector. After drilling the hole, turn the screwdriver counterclockwise to separate the outer casing 1 from the nut 3. Pull the outer casing 1 upwards to install the countersunk screw. During transportation, the outer casing 1 protects the taps from collisions, ensuring the tapping performance. This solves the problems of inconvenience caused by the lack of drilling tools in home use and the taps colliding during transportation, which can cause gaps in the taps and make it difficult to connect them to the connector.

[0038] During use, the dust and debris generated during tapping can be collected in the chip collection chamber 13 through the chip removal groove 12, reducing the dust and debris generated during installation and protecting the user's respiratory health. At the same time, the anti-return blade 10 can be effectively locked in the connector. The design of the anti-return blade 10 in the opposite direction to the upper tap 9 prevents the connector from loosening and enhances the bonding force between the countersunk screw and the connector.

Claims

1. A stainless steel Phillips countersunk screw, including a housing (1), characterized in that: The upper part of the inner shell (1) is provided with an internal thread (11). A drilling disc (2) is fixedly installed on the lower surface of the outer shell (1). An inclined surface (17) is provided on the outer surface of the drilling disc (2). Drilling spikes (18) are fixedly installed on the inclined surface (17). Drilling spikes (18) are fixedly installed on the lower surface of the drilling disc (2). The drilling spikes (18) are arranged in an array on the lower surface of the drilling disc (2). The outer shell (1) is equipped with a screw (8), a connecting post (6) is fixedly installed at the upper end of the screw (8), a nut (3) is fixedly installed on the upper surface of the connecting post (6), a breaking blade (16) is fixedly installed near the lower end of the screw (8), and the lower end of the screw (8) is tapered. The screw (8) has an upper tap (9) fixedly installed on its outer surface. The upper tap (9) is spiral in shape and has a backlash blade (10) fixedly installed on it.

2. The stainless steel Phillips countersunk screw according to claim 1, characterized in that: The outer surface of the connecting column (6) is provided with an external thread (7), which meshes with the internal thread (11) on the outer shell (1).

3. The stainless steel Phillips countersunk screw according to claim 1, characterized in that: The nut (3) has a cross groove (4) and anti-slip texture (5) is provided in the cross groove (4). There are multiple anti-slip textures (5) and they are evenly distributed in the cross groove (4).

4. The stainless steel Phillips countersunk screw according to claim 1, characterized in that: The upper tap (9) has a chip removal groove (12) below it. There are six chip removal grooves (12) and they are symmetrically distributed on the screw (8) in a circle. The chip removal groove (12) has a chip collection cavity (13) inside it. The top of the chip removal groove (12) has an upward arc surface (14).

5. The stainless steel Phillips countersunk screw according to claim 1, characterized in that: A tapping screw (15) is installed above the breaking blade (16).

6. The stainless steel Phillips countersunk screw according to claim 1, characterized in that: Four crushing blades (16) are provided and are symmetrically distributed on the screw (8) in a circle. The crushing blades (16) are located near the lower end of the screw (8) and are not flush with the lower end of the screw (8).

7. The stainless steel Phillips countersunk screw according to claim 1, characterized in that: The diameter of the drill plate (2) is the same as the diameter of the nut (3).

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