Improved self-tapping screw

Abstract

The utility model discloses an improved self-tapping screw, which belongs to the technical field of hardware parts and comprises a self-tapping screw body, a cross-shaped groove arranged at the top end of the self-tapping screw body and an annular boss fixedly mounted on the side surface of the self-tapping screw body. Through cooperative use of the devices and the arrangement of the plugging mechanism, when the self-tapping screw body needs to be screwed into an object, the rotating top ring and the rotating ring are rotated reversely, the connecting rod is driven to rotate synchronously, the connecting rod is matched with the plugging plate, the plugging plate is rotated to the position where the cross-shaped groove is not shielded, and at the moment, the self-tapping screw body is screwed into the object. When the self-tapping screw is used, tools such as a screwdriver can be clamped into the cross-shaped groove, the self-tapping screw body is rotated to be smoothly screwed into an object, after the self-tapping screw body is installed, the top ring and the rotating ring are reversely rotated again, the blocking plate is rotated to the position for shielding the cross-shaped groove, impurities and rainwater entering the groove are reduced, and therefore the difficulty of disassembling the self-tapping screw body is lowered.

Description

Technical Field

[0001] This utility model relates to the field of hardware parts technology, specifically an improved self-tapping screw. Background Technology

[0002] Screws are tools that utilize the physical and mathematical principles of inclined planes, circular rotation, and friction to progressively tighten objects and machine parts. Screws are indispensable industrial necessities in daily life: tiny screws are used in cameras, eyeglasses, watches, and electronics; general screws are used in televisions, electrical appliances, musical instruments, and furniture; large screws and nuts are used in engineering, construction, and bridges; and various sizes of screws are used in transportation equipment, airplanes, trams, and automobiles. Screws play a vital role in industry, and as long as industry exists on Earth, the function of screws will remain important. Screws are a common invention of humankind over thousands of years of production and daily life; in terms of application areas, they are arguably humanity's greatest invention.

[0003] Upon investigation, a utility model patent discloses an improved self-tapping screw (publication number: CN209324827U), which includes a screw head and a screw rod. The lower end of the screw rod is provided with a self-tapping thread, and a flange is provided between the screw head and the screw rod.

[0004] In the aforementioned patent, by setting a flange between the screw head and the screw shank, the flange can play a guiding and positioning role. The screw-catching mechanism of the automatic screw fastening machine can accurately capture the self-tapping screw through the flange and make its screw shank face the preset position. However, when used outdoors, water is easy to accumulate in the hexagonal groove on the top, which leads to corrosion, and impurities may seep into the groove. Once the hexagonal groove is damaged, it will be difficult to disassemble the self-tapping screw.

[0005] Therefore, this utility model provides an improved self-tapping screw to solve the above problems. Utility Model Content

[0006] This invention provides an improved self-tapping screw, which aims to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an improved self-tapping screw, which includes a self-tapping screw body, a cross groove formed at the top of the self-tapping screw body, an annular boss fixedly installed on the side surface of the self-tapping screw body, a rotating groove formed inside the annular boss, and a sealing mechanism disposed inside the rotating groove for blocking the cross groove.

[0008] The sealing mechanism includes a rotating ring rotatably installed inside the rotating groove, a connecting rod rotatably installed on the rotating ring, a top ring disposed above the rotating ring, and a blocking plate rotatably installed at the bottom of the top ring. The end of the connecting rod away from the rotating ring is rotatably connected to one side of the blocking plate.

[0009] As a preferred technical solution of this application, a plurality of connecting rods are provided, and the connecting rods are arranged in a ring array on the rotating ring. A plurality of blocking plates are provided, and the blocking plates are arranged in a ring array at the bottom of the top ring.

[0010] As a preferred technical solution of this application, the side surface of the self-tapping screw body is provided with an installation groove, a telescopic rod is fixedly connected to one inner wall of the installation groove, and a spring head is fixedly connected to the movable end of the telescopic rod.

[0011] As a preferred technical solution of this application, a spring is sleeved on the side surface of the telescopic rod, one end of the spring is fixedly connected to the inner wall of one side of the mounting groove, and the other end of the spring is fixedly connected to one side of the spring head.

[0012] As a preferred technical solution of this application, a helical tail wing is fixedly connected to the bottom end of the self-tapping screw body, and a self-tapping thread is fixedly connected to the side surface of the self-tapping screw body.

[0013] As a preferred technical solution of this application, the bottom of the annular boss is fixedly connected with anti-slip protrusions, and multiple anti-slip protrusions are provided, which are distributed in a ring array at the bottom of the annular boss.

[0014] This utility model has a simple structure and is easy to use. Through the setting of the sealing mechanism, when it is necessary to screw the self-tapping screw body into the object, the rotating top ring and rotating ring are rotated in opposite directions, driving the connecting rod to rotate synchronously, so that the connecting rod cooperates with the sealing plate, and the sealing plate is rotated to a position that does not block the cross groove. At this time, a screwdriver or other tools can be used to insert into the cross groove, and the self-tapping screw body is rotated to make it smoothly screwed into the object. After the self-tapping screw body is installed, the top ring and rotating ring are rotated in opposite directions again, so that the sealing plate is rotated to a position that blocks the cross groove, thereby reducing the entry of impurities and rainwater into the groove, and thus reducing the difficulty of disassembling the self-tapping screw body. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of an improved self-tapping screw. Figure 1 ;

[0016] Figure 2 A schematic diagram of the structure of an improved self-tapping screw. Figure 2 ;

[0017] Figure 3A schematic diagram of the structure of an improved self-tapping screw. Figure 3 ;

[0018] Figure 4 This is a cross-sectional schematic diagram of the mounting groove in an improved self-tapping screw;

[0019] Figure 5 This is a schematic diagram of the installation of a plug plate in an improved self-tapping screw;

[0020] Figure 6 This is a schematic diagram of the installation of the spring-loaded head in an improved self-tapping screw.

[0021] In the picture:

[0022] 1. Self-tapping screw body; 2. Phillips head groove; 3. Rotating groove; 4. Rotating ring; 5. Connecting rod; 6. Blocking plate; 7. Top ring; 8. Annular boss; 9. Mounting groove; 10. Telescopic rod; 11. Spring head; 12. Spring; 13. Spiral tail wing; 14. Self-tapping thread; 15. Anti-slip protrusion. Detailed Implementation

[0023] 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.

[0024] This utility model provides an improved self-tapping screw, such as Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the self-tapping screw includes a self-tapping screw body 1, a cross groove 2 formed at the top of the self-tapping screw body 1, an annular boss 8 fixedly installed on the side surface of the self-tapping screw body 1, a rotating groove 3 formed inside the annular boss 8, and a sealing mechanism provided inside the rotating groove 3 for blocking the cross groove 2.

[0025] The sealing mechanism includes a rotating ring 4 rotatably installed inside the rotating groove 3, a connecting rod 5 rotatably installed on the rotating ring 4, a top ring 7 set above the rotating ring 4, and a blocking plate 6 rotatably installed at the bottom of the top ring 7. The end of the connecting rod 5 away from the rotating ring 4 is rotatably connected to one side of the blocking plate 6.

[0026] Multiple connecting rods 5 are provided, and the connecting rods 5 are arranged in a ring array on the rotating ring 4. Multiple blocking plates 6 are provided, and the blocking plates 6 are arranged in a ring array at the bottom of the top ring 7.

[0027] When using this self-tapping screw, to screw the screw body 1 into an object, the top ring 7 and the rotating ring 4 are rotated in opposite directions. Rotating the top ring 7 causes the connecting rod 5 to rotate synchronously. Through the cooperation between the connecting rod 5 and the blocking plate 6, the blocking plate 6 is rotated to a position that does not obstruct the cross groove 2. At this time, a screwdriver or other tool can be inserted into the cross groove 2 to rotate the self-tapping screw body 1, allowing it to screw into the object. After the self-tapping screw body 1 is installed, rotating the top ring 7 and the rotating ring 4 in the opposite direction causes the blocking plate 6 to rotate to a position that obstructs the cross groove 2. At this time, screwdrivers or other tools cannot be inserted into the cross groove 2, reducing the entry of impurities into the cross groove 2 and reducing the possibility of rainwater entering the cross groove 2, thus improving safety. The annular boss 8 increases the contact area between the self-tapping screw body 1 and the object, improving the stability of the self-tapping screw body 1 inside the object. At the same time, the rotating groove 3 and the sealing mechanism allow the blocking plate 6 to flexibly obstruct or expose the cross groove 2, facilitating operation by the operator.

[0028] Furthermore, to ensure the stability of the self-tapping screw body 1 embedded end, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a mounting groove 9 is provided on the side surface of the self-tapping screw body 1, and a telescopic rod 10 is fixedly connected to the inner wall of one side of the mounting groove 9. A spring-loaded head 11 is fixedly connected to the movable end of the telescopic rod 10.

[0029] A spring 12 is fitted on the side surface of the telescopic rod 10. One end of the spring 12 is fixedly connected to the inner wall of the mounting groove 9, and the other end of the spring 12 is fixedly connected to the side of the spring head 11.

[0030] When using this self-tapping screw, if the screw body 1 needs to be screwed deeper into the object, the spring head 11 will first contact the inner wall of the object. As the screw body 1 continues to rotate and penetrate deeper, the spring head 11 will be squeezed by the object and move into the mounting groove 9, while driving the telescopic rod 10 to extend and retract. At this time, the spring 12 will be compressed, generating a certain elastic force. When the screw body 1 reaches the predetermined depth, the spring head 11 will be pressed tightly against the inner wall of the object under the elastic force of the spring 12, thereby increasing the friction between the screw body 1 and the object and improving the stability of the screw body 1 inside the object. This design not only ensures the firm installation of the screw body 1, but also effectively prevents it from falling off due to loosening or external force, improving the safety and reliability of use.

[0031] It should be noted that, in order to improve the installation efficiency of the self-tapping screw body 1, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, a spiral tail wing 13 is fixedly connected to the bottom end of the self-tapping screw body 1, and a self-tapping thread 14 is fixedly connected to the side surface of the self-tapping screw body 1.

[0032] The bottom of the annular boss 8 is fixedly connected with anti-slip protrusions 15. Multiple anti-slip protrusions 15 are provided and are distributed in a ring array at the bottom of the annular boss 8.

[0033] When using this self-tapping screw, the operator only needs to align the self-tapping screw body 1 with the hole to be installed, and then rotate the rotating ring 4. The rotating ring 4 will drive the connecting rod 5 and the top ring 7 to rotate together. Since the outer surface of the top ring 7 is provided with threads that are compatible with the self-tapping thread 14, the rotation of the top ring 7 will drive the self-tapping screw body 1 to rotate together and move downward. The design of the spiral tail wing 13 can increase the stability of the self-tapping screw body 1 during the rotation process, so that the self-tapping screw body 1 can be screwed into the object more smoothly. At the same time, the setting of the self-tapping thread 14 can enhance the connection strength between the self-tapping screw body 1 and the object, and improve the firmness of the installation. The anti-slip protrusion 15 at the bottom of the annular boss 8 can increase the friction between the annular boss 8 and the contact surface of the object, preventing the self-tapping screw body 1 from sliding or shifting during the installation process, further improving the installation efficiency and accuracy.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An improved self-tapping screw, characterized in that: The self-tapping screw includes a self-tapping screw body (1), a cross groove (2) formed at the top of the self-tapping screw body (1), an annular boss (8) fixedly installed on the side surface of the self-tapping screw body (1), a rotating groove (3) formed inside the annular boss (8), and a sealing mechanism provided inside the rotating groove (3) for blocking the cross groove (2). The sealing mechanism includes a rotating ring (4) rotatably installed inside the rotating groove (3), a connecting rod (5) rotatably installed on the rotating ring (4), a top ring (7) disposed above the rotating ring (4), and a blocking plate (6) rotatably installed at the bottom of the top ring (7). One end of the connecting rod (5) away from the rotating ring (4) is rotatably connected to one side of the blocking plate (6).

2. The improved self-tapping screw according to claim 1, characterized in that: Multiple connecting rods (5) are provided, and the connecting rods (5) are arranged in a ring array on the rotating ring (4). Multiple blocking plates (6) are provided, and the blocking plates (6) are arranged in a ring array at the bottom of the top ring (7).

3. An improved self-tapping screw according to claim 1, characterized in that: The self-tapping screw body (1) has an installation groove (9) on its side surface. A telescopic rod (10) is fixedly connected to the inner wall of one side of the installation groove (9). A spring head (11) is fixedly connected to the movable end of the telescopic rod (10).

4. An improved self-tapping screw according to claim 3, characterized in that: A spring (12) is fitted on the side surface of the telescopic rod (10). One end of the spring (12) is fixedly connected to the inner wall of one side of the mounting groove (9), and the other end of the spring (12) is fixedly connected to one side of the spring head (11).

5. An improved self-tapping screw according to claim 1, characterized in that: The bottom end of the self-tapping screw body (1) is fixedly connected with a spiral tail wing (13), and the side surface of the self-tapping screw body (1) is fixedly connected with a self-tapping thread (14).

6. An improved self-tapping screw according to claim 5, characterized in that: The bottom of the annular boss (8) is fixedly connected with anti-slip protrusions (15). Multiple anti-slip protrusions (15) are provided, and the anti-slip protrusions (15) are arranged in a ring array at the bottom of the annular boss (8).

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