Pan head tail-cutting self-tapping screw
By designing pan head self-tapping screws with cut-off ends, the problems of groove wear and oxidation rust were solved, and a multi-groove design and protection mechanism were realized, improving the screw's flexibility and durability.
Patent Information
- Application Number
- CN202520110829.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2035-01-17
AI Technical Summary
Pan head self-tapping screws are prone to wear and tear on the slots during use, resulting in missing teeth. They are also susceptible to oxidation and rust in the external environment, making them difficult to remove.
A pan head self-tapping screw with a chip removal groove is designed. The tail of the screw shank is cut with a chip removal groove, and the top is integrally formed with a pan head. The pan head includes a main pan and a thickened pan. The main pan has a hexagonal groove and a rectangular groove. The rectangular groove contains a protective block connected to a movable rod and a spring. The main pan is a regular hexagonal prism, and a rubber ring is bonded to the bottom of the thickened pan.
The screw has improved tolerance, allowing the use of flat slots when the hexagonal slots wear out. Springs and movable rod guards extend the service life of rectangular slots, and rubber rings reduce material pressure loss.
Smart Images
Figure CN223549598U_ABST
Abstract
Description
Technical Field
[0001] This utility model mainly relates to the field of fastener technology, specifically to a pan head self-tapping screw with a cut-off end. Background Technology
[0002] Pan head self-tapping screws typically consist of three parts: a head, a shank, and the end of the shank. The head is shaped like a pan and has self-tapping properties, allowing it to directly tap into metal plates or other hard materials without pre-drilling, thus achieving quick and convenient fixing. Due to its unique self-tapping properties, it has become the most basic and practical fastener and is widely used in various fields.
[0003] When pan head self-tapping screws are used with tools such as wrenches or screwdrivers, their slots are prone to wear and tear, resulting in gaps in the threads. This makes it difficult to remove the screws later. On the other hand, when the screws are used in certain external environments, the slots are prone to oxidation and rust, which also makes it difficult to remove the screws later. Utility Model Content
[0004] 1. The technical problem to be solved by the utility model:
[0005] This invention provides a pan head self-tapping screw with a cut-off end to solve the technical problems existing in the background art.
[0006] 2. Technical Solution:
[0007] To achieve the above objectives, the technical solution provided by this utility model is as follows: a pan head self-tapping screw, comprising a screw shank, wherein a chip removal groove is cut at the tail of the screw shank, and a pan head is integrally formed at the top of the screw shank;
[0008] The pan head includes a main pan located at the top and a thickened pan installed at the bottom of the main pan. The top of the main pan has a hexagonal groove, and each side of the inner wall of the hexagonal groove has a rectangular groove. Two oppositely distributed rectangular grooves form a flat-mouth groove.
[0009] The rectangular groove extends downward and has a guide groove at the bottom. A movable rod is slidably installed in the guide groove. The bottom of the movable rod is connected to the bottom of the guide groove by a spring. A protective block is fixedly installed on the top of the movable rod and is slidably connected to the rectangular groove.
[0010] Furthermore, the main disk is a regular hexagonal prism.
[0011] Furthermore, a rubber ring is bonded to the bottom of the thickened disc.
[0012] Furthermore, the thickened disk sidewall has a fully penetrating auxiliary groove along the horizontal direction.
[0013] 3. Beneficial effects:
[0014] Compared with the prior art, the technical solution provided by this utility model has the following advantages: the hexagonal slot can be used with a hexagonal screwdriver. When the hexagonal slot is chipped or there is no hexagonal screwdriver on hand, the flat slot can be used with a flat screwdriver. Moreover, there are three flat slots, which can improve the fault tolerance rate.
[0015] The spring, in conjunction with the movable rod, can push the protective block so that the top of the protective block coincides with the top of the rectangular groove, thereby protecting the rectangular groove and extending the time before it oxidizes and rusts in the external environment. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the pan head structure of this utility model;
[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the pan head of this utility model.
[0019] Figure label:
[0020] 1. Pan head; 11. Main pan; 111. Hexagonal groove; 112. Rectangular groove; 113. Guide groove; 12. Thickened pan; 121. Auxiliary groove; 2. Screw rod body; 21. Chip removal groove; 3. Protective block; 4. Movable rod; 5. Spring; 6. Rubber ring. Detailed Implementation
[0021] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.
[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example
[0025] See attached document Figure 1-3 A pan head self-tapping screw includes a screw shank 2, the tail of which is cut with a chip removal groove 21, and the top of the screw shank 2 is integrally formed with a pan head 1;
[0026] The pan head 1 includes a main pan 11 located at the top and a thickened pan 12 installed at the bottom of the main pan 11. A hexagonal groove 111 is provided on the top of the main pan 11, and a rectangular groove 112 is provided on the inner wall of each side of the hexagonal groove 111. Two rectangular grooves 112 that are distributed opposite to each other form a flat groove.
[0027] The rectangular groove 112 extends downward and has a guide groove 113 at the bottom. A movable rod 4 is slidably installed in the guide groove 113. The bottom of the movable rod 4 is connected to the bottom of the guide groove 113 by a spring 5. A protective block 3 is fixedly installed on the top of the movable rod 4. The protective block 3 is slidably connected to the rectangular groove 112.
[0028] In this embodiment, when the screw rod 2 penetrates into the material, the generated chips can be discharged through the chip removal groove 21, thereby preventing the chips from squeezing the material and causing it to crack.
[0029] The plate head 1 includes a main plate 11 and a thickened plate 12, thereby increasing the overall thickness and making the overall strength higher;
[0030] The hex slot 111 can be used with a hex screwdriver. When the hex slot 111 is chipped or a hex screwdriver is not available, the flat slot can be used with a flat screwdriver. There are three flat slots, which can improve the fault tolerance.
[0031] The spring 5, together with the movable rod 4, can push the protective block 3 so that the top of the protective block 3 coincides with the top of the rectangular groove 112, thereby protecting the rectangular groove 112 and extending the time for the rectangular groove 112 to oxidize and rust in the outside world.
[0032] In the above embodiment, the main plate 11 is a regular hexagonal prism, so it can also be used with a hexagonal wrench.
[0033] In the above embodiment, a rubber ring 6 is bonded to the bottom of the thickened disk 12 to reduce pressure loss on the material.
[0034] The thickened disk 12 has a fully penetrating auxiliary groove 121 on its side wall along the horizontal direction. When wear gaps occur on the hexagonal groove 111, the rectangular groove 112, and the outer side of the main disk 11, a matching rod can be inserted into the auxiliary groove 121, and then the rod can be rotated to rotate the screw rod 2 to remove it from the material.
[0035] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
[0036] It should be noted that the above content falls within the scope of the inventor's technical knowledge. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art.
Claims
1. A pan head self-tapping screw, comprising a screw shank (2), characterized in that: The screw rod body (2) has a chip removal groove (21) cut at the tail end, and a pan head (1) integrally formed at the top of the screw rod body (2). The pan head (1) includes a main pan (11) located at the top and a thickened pan (12) installed at the bottom of the main pan (11). The top of the main pan (11) is provided with a hexagonal groove (111), and each side of the inner wall of the hexagonal groove (111) is provided with a rectangular groove (112). Two rectangular grooves (112) distributed opposite to each other form a flat groove. The rectangular groove (112) extends downward and has a guide groove (113) at the bottom. A movable rod (4) is slidably installed in the guide groove (113). The bottom of the movable rod (4) is connected to the bottom of the guide groove (113) by a spring (5). A protective block (3) is fixedly installed on the top of the movable rod (4). The protective block (3) is slidably connected to the rectangular groove (112).
2. The pan head self-tapping screw according to claim 1, characterized in that: The main disk (11) is a regular hexagonal prism.
3. A pan head self-tapping screw with a cut-off tail according to claim 1, characterized in that: A rubber ring (6) is bonded to the bottom of the thickened plate (12).
4. A pan head self-tapping screw with a cut-off tail according to claim 1, characterized in that: The thickened plate (12) has a fully penetrating auxiliary groove (121) on its side wall in the horizontal direction.