Large flat head self-tapping screw
By using a combined structure of threaded grooves, threaded rods, sealing covers and rubber pads in the self-tapping screws, the problem of lack of waterproof performance of self-tapping screws is solved, and the effect of waterproof and oil-filled maintenance is achieved, which extends the service life and improves practicality.
Patent Information
- Application Number
- CN202421922446.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-09
AI Technical Summary
The existing self-tapping screws lack waterproof performance when installed and used, which makes water easily penetrate into the edge of the screw and cause internal corrosion.
A large flat head self-tapping screw is designed, using a combined structure of thread grooves, threaded rods, sealing covers and rubber pads to prevent water from entering; at the same time, the oil injection maintenance is achieved through the setting of the liquid guiding groove and the diverting groove to prevent rust.
Effectively prevent water from entering the screw, avoid rust, extend the service life, and prevent the screw main body from rusting through oil injection and improving practicality.
Smart Images
Figure CN222977190U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of self - tapping screws, in particular to a large flat - head self - tapping screw. Background Technique
[0002] Self - tapping screws are used for non - metals or softer metals without the need for pre - drilling holes and tapping. Self - tapping screws are pointed so that they can "self - tap". Ordinary screws are flat - headed and have a uniform thickness.
[0003] However, when the existing self - tapping screws are installed and used, they lack certain waterproof performance. After installation, water easily seeps in from the edge of the screw, resulting in internal corrosion. Therefore, in order to correct the above - mentioned defects, we propose a large flat - head self - tapping screw. Content of the Utility Model
[0004] An object of the utility model is to solve at least one of the technical problems existing in the prior art. A large flat - head self - tapping screw is provided, including a nut: a screw body is fixedly connected to the bottom of the nut, a tapping drill bit is fixedly connected to the bottom of the screw body, a horizontal groove is opened at the top of the nut, a threaded groove is opened at the bottom of the horizontal groove, a threaded rod is in threaded connection with the threaded groove, a sealing cover is fixedly connected to the top end of the threaded rod, a rotating block is fixedly connected to the top of the sealing cover, and a rubber pad is fixedly connected to the bottom of the sealing cover. A liquid - guiding groove is opened in the screw body, and a plurality of shunt grooves are opened on both sides of the liquid - guiding groove. The shunt grooves communicate with the liquid - guiding groove.
[0005] According to the described large flat - head self - tapping screw, anti - slip lines are opened on the rotating block.
[0006] According to the described large flat - head self - tapping screw, an auxiliary sleeve is sleeved on the screw body.
[0007] According to the described large flat - head self - tapping screw, the shunt grooves are inclined.
[0008] According to the described large flat - head self - tapping screw, a plurality of the shunt grooves are equidistantly distributed on the screw body.
[0009] According to the described large flat - head self - tapping screw, a stop washer is sleeved on the screw body.
[0010] The additional aspects and advantages of the utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the utility model.
[0011] 1. Through the settings of the threaded groove, threaded rod, sealing cover and rubber pad, water can be prevented from entering the pores of the article, thereby avoiding the corrosion of the screw body and increasing the service life of the screw body;
[0012] 2. Through the settings of the liquid guide groove and the shunt groove, the lubricating oil flows to the tapping drill bit and the outer wall of the screw body, thereby realizing oil injection maintenance, avoiding the situation that the screw body is rusted and difficult to turn, and improving the practicability of the screw. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The present invention will be further described below in conjunction with the drawings and embodiments;
[0014] Figure 1 Partial perspective view of the present invention;
[0015] Figure 2 Overall structure diagram of the present invention;
[0016] Figure 3 Top view of the nut and the thread groove;
[0017] Figure 4 Perspective view of the nut and the screw body.
[0018] Legend:
[0019] 1. Nut; 2. Screw body; 3. Tapping drill bit; 4. Horizontal groove; 5. Thread groove; 6. Thread rod; 7. Sealing cover; 8. Rotating block; 9. Rubber pad; 10. Liquid guide groove; 11. Shunt groove; 12. Auxiliary sleeve; 13. Stop washer. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the protection scope of the present invention.
[0021] Referring to Figures 1 to 4 , an embodiment of the present invention is a large flat head self-tapping screw, which includes a nut 1: the bottom of the nut 1 is fixedly connected to a screw body 2, the bottom of the screw body 2 is fixedly connected to a tapping drill bit 3, a horizontal groove 4 is opened at the top of the nut 1, a thread groove 5 is opened at the bottom of the horizontal groove 4, a thread rod 6 is threadedly connected in the thread groove 5, the top end of the thread rod 6 is fixedly connected to a sealing cover 7, the top of the sealing cover 7 is fixedly connected to a rotating block 8, and the bottom of the sealing cover 7 is fixedly connected to a rubber pad 9. A liquid guide groove 10 is opened in the screw body 2, and a plurality of shunt grooves 11 are opened on both sides of the liquid guide groove 10. The shunt grooves 11 communicate with the liquid guide groove 10.
[0022] The surface friction of the rotating block 8 is increased, and anti-slip lines are opened on the rotating block 8.
[0023] The screw body 2 is supported to prevent the screw body 2 from tilting during tapping. An auxiliary sleeve 12 is sleeved on the screw body 2.
[0024] To facilitate the outflow of lubricating oil, the diversion groove 11 is inclined.
[0025] To facilitate the dispersion of lubricating oil, several diversion grooves 11 are equidistantly distributed on the screw body 2.
[0026] To prevent the screw body 2 from loosening, a stop washer 13 is sleeved on the screw body 2.
[0027] Working principle: When the present utility model is in use, the auxiliary sleeve 12 is rotated to the bottom end of the screw body 2 so that its bottom surface fits the surface of the target part to support the screw body 2, facilitating tapping in the vertical direction. Then, the nut 1 is turned by a tool, and the nut 1 drives the screw body 2 and the tapping drill bit 3 to rotate, thereby tapping the surface of the article. During the tapping process, as the screw body 2 penetrates deeper, the external threads on the screw body 2 rotate along the internal threads of the auxiliary sleeve 12, making the bottom surface of the auxiliary sleeve 12 always closely adhere to the surface of the target part, and further keeping the screw body 2 perpendicular during the tapping process to avoid its skewing. When the tapping is completed, the screw body 2 is removed, and the auxiliary sleeve 12 is removed. Then, the screw body 2 is screwed into the tapped thread hole. After the screw body 2 is screwed into the article, the stop washer 13 is used to prevent the screw body 2 from loosening, and lubricating oil is introduced into the thread groove 5. The lubricating oil enters the diversion groove 11 through the thread groove 5 and the liquid guide groove 10, and thus is dispersed through the diversion groove 11 and flows to the outer wall of the screw body 2 to achieve oil injection maintenance, avoiding the situation that the screw body 2 rusts and becomes difficult to turn. Then, the threaded rod 6 is screwed into the thread groove 5 through the rotating block 8, and the rubber pad 9 is made to closely adhere to the surface of the article to prevent water from entering the pores of the article through the gap between the lower part of the nut 1 and the surface of the article, improving the rust prevention effect of the screw body 2.
[0028] The above has described the embodiments of the present utility model in detail with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the said technical field, various changes can be made without departing from the gist of the present utility model.
Claims
1. A large flat head self-tapping screw, characterized in that: The invention comprises a nut (1): a screw body (2) is fixedly connected to the bottom of the nut (1), a tapping drill bit (3) is fixedly connected to the bottom of the screw body (2), a horizontal groove (4) is provided at the top of the nut (1), a threaded groove (5) is provided at the bottom of the horizontal groove (4), a threaded rod (6) is internally threadedly connected to the threaded groove (5), a sealing cover (7) is fixedly connected to the top of the threaded rod (6), a rotating block (8) is fixedly connected to the top of the sealing cover (7), and a rubber pad (9) is fixedly connected to the bottom of the sealing cover (7), a liquid guide groove (10) is provided in the screw body (2), a plurality of diversion grooves (11) are provided on both sides of the liquid guide groove (10), and the diversion grooves (11) are communicated with the liquid guide groove (10).
2. A large flat head self-tapping screw according to claim 1, characterized in that: The rotating block (8) is provided with anti-slip grooves.
3. A large flat head self-tapping screw according to claim 1, characterized in that: An auxiliary sleeve (12) is sleeved on the screw body (2).
4. A large flat head self-tapping screw according to claim 1, characterized in that: The diverter trough (11) is arranged in an inclined manner.
5. A large flat head self-tapping screw according to claim 1, characterized in that: A plurality of the diversion grooves (11) are distributed on the screw body (2) at equal intervals.
6. A large flat head self-tapping screw according to claim 1, characterized in that: A stop washer (13) is sleeved on the screw body (2).