A kind of anti-loosening self-tapping screw
By setting a notch and a bent part on the second self-tapping thread of the self-tapping screw to form a barb-like structure, the problem of the self-tapping screw loosening as the use time increases is solved, and higher stability and service life are achieved.
Patent Information
- Application Number
- CN202421538423.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-07-02
AI Technical Summary
The existing self-tapping screws will become loose as they increase their use time.
An anti-loosening self-tapping screw is designed. By providing a notch and a bent portion on the second self-tapping thread, the bent portion forms a barb-like structure within the screwed material, thereby enhancing the fixity of the screw.
It effectively avoids the self-tapping screws loose during use, and improves the stability and service life of the screws.
Smart Images
Figure CN222717247U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of self-tapping screws, and more specifically, to an anti-loosening self-tapping screw. Background Art
[0002] The self-tapping screws in the prior art are generally screwed into a material which is not too hard, such as a wooden board or a plastic board, by a user holding a screwdriver.
[0003] During the screwing process, the self-tapping screw will gradually squeeze the screwed-in material on its screwing path. Specifically, as the self-tapping screw is rotated, it will be automatically driven by the self-tapping thread on its surface to move into the screwed-in material, which will leave a threaded structure that matches the shape of the self-tapping screw in the screwed-in material. As the use time goes by, the shape of the threaded structure formed by extrusion will gradually stabilize, that is, it will maintain a fixed shape and will not recover, which will reduce the friction between the threaded structure and the surface of the self-tapping screw, thereby causing the self-tapping screw to loosen. Utility Model Content
[0004] The main purpose of the utility model is to provide an anti-loosening self-tapping screw, aiming to solve the problem that the self-tapping screws in the prior art will become loose as the use time increases.
[0005] In order to solve the above technical problems, an anti-loosening self-tapping screw is proposed, comprising: a body, which is arranged in a columnar shape;
[0006] A screwing portion, fixed to one end of the body, and provided with a screwing notch;
[0007] A first self-tapping thread is spirally arranged on the surface of the body;
[0008] A second self-tapping thread is spirally arranged on the surface of the body, and the second self-tapping thread and the first self-tapping thread are alternately arranged;
[0009] The second self-tapping thread is provided with a notch in the curved portion, the curved portion is arranged at the notch, and the side surface of the curved portion protrudes from the side surface of the second self-tapping thread at the corresponding position.
[0010] In any of the above technical solutions, further, one end of the curved portion is in contact with the second self-tapping thread at its corresponding position, and a gap is left between the other end of the curved portion and the second self-tapping thread at its corresponding position.
[0011] In any of the above technical solutions, further, the bending portion is provided in plurality.
[0012] In any of the above technical solutions, further, the main body includes a first section, a second section and a third section connected in sequence, and the screwing portion is located at an end of the third section away from the second section; the first section is set in a conical surface, the second section is set in an arc surface, and the third section is set in a cylindrical shape.
[0013] In any of the above technical solutions, further, the third section includes a smooth section and a threaded section;
[0014] The threaded section is connected to the second section, the smooth section is located at a side of the threaded section away from the second section, and the screwing portion is located at an end of the smooth section away from the threaded section.
[0015] In any of the above technical solutions, further, a plurality of the curved portions are evenly arranged on the threaded section and the second section.
[0016] In any of the above technical solutions, further, the screwing notch includes: a cross slot and a regular polygonal slot;
[0017] The regular polygonal groove and the cross groove are overlapped, and the depth of the regular polygonal groove is smaller than the depth of the cross groove.
[0018] The beneficial effects are:
[0019] 1. The anti-loosening self-tapping screw of the utility model is provided with a body and a screwing part, so that a first self-tapping thread and a second self-tapping thread are provided on the body, and the body can be acted on by the screwing part, and then the anti-loosening self-tapping screw is screwed into the screwed material by means of the first self-tapping thread and the second self-tapping thread on the body;
[0020] 2. By providing a notch on the second self-tapping thread, providing a bent portion at the notch, and protruding the side of the bent portion from the second self-tapping thread, on the one hand, the bent portion can be screwed into the screwed-in material with the help of the texture of the second self-tapping thread, and on the other hand, as the use time goes by, the part of the screwed-in material that is accumulated by extrusion and deformation will protrude toward the bent portion and move with the side of the second self-tapping thread under the action of its own stress, so that the bent portion can form a barb-like structure on the path of the rotation structure in the screwed-in material, so that the anti-loosening self-tapping screw will not loosen;
[0021] 3. The first self-tapping thread and the second self-tapping thread are provided at the same time, and the notch and the bending part are provided only on the second self-tapping thread to ensure the convenience of screwing in the self-tapping screw and avoid the situation of excessive resistance. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 This is a first-view stereoscopic structural diagram of an anti-loosening self-tapping screw of the utility model;
[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of a self-tapping screw for preventing loosening according to the utility model from a second viewing angle;
[0025] Figure 3 It is a front view structural schematic diagram of an anti-loosening self-tapping screw of the utility model;
[0026] Figure 4 yes Figure 3 Schematic diagram of the local enlarged structure at point A in the middle.
[0027] The following are the descriptions of the reference numerals:
[0028] 1. Main body; 101. First section; 102. Second section; 103. Third section; 104. Smooth section; 105. Threaded section;
[0029] 2. Screwing part;
[0030] 3. The first self-tapping thread;
[0031] 4. Second self-tapping thread; 401. Notch;
[0032] 5. Bend; 501. Gap. DETAILED DESCRIPTION
[0033] Below, the example embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described herein. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0034] It should be noted that, as shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not specifically refer to the singular, but may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also include other steps or elements.
[0035] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.
[0036] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0038] The utility model provides an anti-loosening self-tapping screw, which mainly forms a barb-shaped structure after being screwed into the path for a period of time by arranging a notch 401 on the second self-tapping thread 4 and a bent portion 5 at the notch 401, thereby preventing the anti-loosening self-tapping screw from becoming loose by forming a barb-shaped structure.
[0039] The following embodiments are used to describe in detail an anti-loosening self-tapping screw of the present application.
[0040] In this embodiment, if Figures 1 to 4 As shown, the anti-loosening self-tapping screw comprises: a body 1, which is arranged in a columnar shape;
[0041] The screwing part 2 is fixed to one end of the body 1 and is provided with a screwing notch;
[0042] A first self-tapping thread 3 is spirally arranged on the surface of the body 1;
[0043] A second self-tapping thread 4 is spirally arranged on the surface of the body 1, and the second self-tapping thread 4 and the first self-tapping thread 3 are alternately arranged;
[0044] The curved portion 5 and the second self-tapping thread 4 are provided with a notch 401 , and the curved portion 5 is arranged at the notch 401 , and the side surface of the curved portion 5 protrudes from the side surface of the second self-tapping thread 4 at the corresponding position.
[0045] In the present technical solution, for the convenience of description, the screwing direction of the anti-loosening self-tapping screw is called the front side, and the end where the screwing part 2 is located is called the rear end. The front end of the body 1 is used to abut against the screwed material, and the front end is usually set to a smaller diameter. The screwing part 2 is fixed to the rear side end of the body 1, and the rear side surface of the screwing part 2 is provided with a screwing notch.
[0046] The first self-tapping thread 3 and the second self-tapping thread 4 are both clockwise spiral structures arranged on the surface of the body 1, and the thickness of the first self-tapping thread 3 and the second self-tapping thread 4 gradually decreases along the radial direction of the body 1. The first self-tapping thread 3 and the second self-tapping thread 4 start from the same position in the axial direction of the body 1, and the difference is that the starting angles of the first self-tapping thread 3 and the second self-tapping thread 4 are different, so that the first self-tapping thread 3 and the second self-tapping thread 4 appear to be stacked on each other, that is, the first self-tapping thread 3 and the second self-tapping thread 4 are arranged alternately.
[0047] The notch 401 on the second self-tapping thread 4 is the place where the second self-tapping thread 4 is disconnected, and the notch 401 can be formed by punching, cutting, etc. after the continuous second self-tapping thread 4 is formed. The bent portion 5 is a short thread-like structure arranged at the notch 401, and the rear side surface of the bent portion 5 protrudes from the rear side surface of the second self-tapping thread 4 at the corresponding position.
[0048] Specifically, when the bending portion 5 does not exist, the rotation path in the screwed-in material is consistent with the texture of the second self-tapping thread 4. After the bending portion 5 is provided, the width of the rear side of the second self-tapping thread 4 when screwed in will be increased, and the degree of squeezing of the screwed-in material at the rotation path will be increased. When the anti-loosening self-tapping screw is rotated to a fixed position, the anti-loosening self-tapping screw will maintain a relatively fixed position with the screwed-in material. As the fixing time increases, the screwed-in material squeezed on the rotation path will gradually move toward the rear side of the second self-tapping thread 4, and then the screwed-in material will abut against the protruding area of the bending portion 5, thereby forming a barb structure on the rotation path.
[0049] In some specific technical solutions, the notch 401 on the second self-tapping thread 4 extends radially to the surface of the body 1. In some other technical solutions, the notch 401 of the second self-tapping thread 4 does not extend radially to the surface of the body 1.
[0050] In some technical solutions, the bent portion 5 is a deformation portion generated when the notch 401 of the second self-tapping thread 4 is punched, so that the local structure at the notch 401 of the second self-tapping thread 4 protrudes from the original side of the second self-tapping thread 4.
[0051] In some other technical solutions, the first self-tapping thread 3 and the second self-tapping thread 4 are both counterclockwise spiral structures arranged on the surface of the body 1 .
[0052] In this embodiment, one end of the curved portion 5 is in contact with the second self-tapping thread 4 at the corresponding position, and a gap 501 is left between the other end of the curved portion 5 and the second self-tapping thread 4 at the corresponding position.
[0053] In this technical solution, one end of the bent portion 5 first contacts the screwed-in material and is fitted with the side surface of the notch 401 of the second self-tapping thread 4, and a gap 501 is left between the other side surface of the notch 401 of the second self-tapping thread 4 and the bent portion 5 later contacts the screwed-in material.
[0054] In other words, the end face of the curved portion 5 at the front position is fitted with the side face of the notch 401 of the second self-tapping thread 4, and a gap 501 is left between the end face of the curved portion 5 at the rear position and the other side face of the notch 401 of the second self-tapping thread 4.
[0055] This arrangement allows the bent portion to be screwed into the screwed-in material via the movement path of the second self-tapping thread during screwing-in, and allows the screwed-in material squeezed on the rotation path to move into the gap 501 when deforming and restoring.
[0056] In this embodiment, a plurality of bending portions 5 are provided.
[0057] In this technical solution, the second self-tapping thread 4 is set to nine turns, and the notches 401 and the bends 5 are evenly set to 16 on the spiral line. Specifically, the part of the second self-tapping thread 4 at the front side is not provided with notches 401 and bends 5.
[0058] In some technical solutions, the second self-tapping thread 4 is provided with nine turns, the notches 401 are provided with 18, and the bends 5 are provided with 16. Specifically, the second self-tapping thread 4 at the front side is provided with notches 401, but no bends 5 are provided.
[0059] In this embodiment, the body 1 includes a first section 101, a second section 102 and a third section 103 connected in sequence, and the screwing portion 2 is located at an end of the third section 103 away from the second section 102;
[0060] The first section 101 is configured in a conical surface, the second section 102 is configured in an arc surface, and the third section 103 is configured in a cylindrical shape.
[0061] In the technical solution, the first section 101 is located at the front side and has a conical structure, and the front side surface is set as a plane. The second section 102 is cylindrical and has a circumferentially symmetrical structure. The normal line of the second section 102 is an arc line. The second section 102 is set at the rear side of the first section 101 and is coaxially set. The third section 103 is set in a cylindrical shape and is set at the rear side and coaxially set with the second section 102. The screwing part 2 is set at the rear side of the third section 103 and is coaxially set.
[0062] In some technical solutions, the front side of the first self-tapping thread 3 and the second self-tapping thread 4 is coplanar with the front side of the first section 101. In other technical solutions, the front side of the first self-tapping thread 3 and the second self-tapping thread 4 protrudes from the front side of the first section 101.
[0063] In this embodiment, the third section 103 includes a smooth section 104 and a threaded section 105;
[0064] The threaded section 105 is connected to the second section 102 , the smooth section 104 is located at a side of the threaded section 105 away from the second section 102 , and the screwing portion 2 is located at an end of the smooth section 104 away from the threaded section 105 .
[0065] In this technical solution, the threaded section 105 and the smooth section 104 are coaxial front and back, the second section 102 is connected to the threaded section 105, and the screwing section 2 is connected to the smooth section 104. Specifically, the threaded section 105 and the smooth section 104 have the same diameter.
[0066] The smooth section 104 is provided to reduce the thread rolling portion required for the anti-loosening self-tapping screw, thereby saving processing steps.
[0067] In some technical solutions, the diameter of the threaded section 105 is smaller than the diameter of the smooth section 104 .
[0068] In this embodiment, a plurality of curved portions 5 are evenly arranged on the threaded section 105 and the second section 102 .
[0069] In the present technical solution, the curved portion 5 is only provided on the threaded section 105 and the second section 102, and the curved portion 5 is not provided on the first section 101, so as to facilitate the initial screwing of the anti-loosening self-tapping screw into the screwed material. Then, the curved portion 5 is provided on the second section 102, so as to pre-extrude the screwed material on the rotation path, so as to facilitate the curved portion 5 on the subsequent threaded section 105 to squeeze the screwed material again, and avoid the phenomenon of sudden increase in screwing resistance.
[0070] In this embodiment, the screwing notch includes: a cross slot and a regular polygonal slot;
[0071] The regular polygonal groove and the cross groove are overlapped, and the depth of the regular polygonal groove is smaller than the depth of the cross groove.
[0072] In the technical solution, the screwing notch includes a cross slot and two regular polygonal slots. Both regular polygonal slots are regular hexagonal slots, and the two regular hexagonal slots are staggered to form a twenty-four-sided special-shaped slot, which is convenient for clamping a variety of screwing tools. The depth of the cross slot is greater than the depth of the regular polygonal slot, which is convenient for clamping a cross screwdriver or a flat screwdriver.
[0073] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.
Claims
1. A self-tapping screw, characterized in that: include: The body (1) is arranged in a columnar shape; A screwing portion (2) is fixed to one end of the body (1) and is provided with a screwing notch; A first self-tapping thread (3) is spirally arranged on the surface of the body (1); A second self-tapping thread (4) is arranged on the surface of the body (1) along a spiral rotation, and the second self-tapping thread (4) and the first self-tapping thread (3) are arranged alternately; The curved portion (5) is provided with a notch (401) in the second self-tapping thread (4), the curved portion (5) is arranged at the notch (401), and the side surface of the curved portion (5) protrudes from the side surface of the second self-tapping thread (4) at its corresponding position.
2. The anti-loosening self-tapping screw according to claim 1, characterized in that: One end of the curved portion (5) is in contact with the second self-tapping thread (4) at its corresponding position, and a gap (501) is left between the other end of the curved portion (5) and the second self-tapping thread (4) at its corresponding position.
3. The anti-loosening self-tapping screw according to claim 1, characterized in that: The bending portion (5) is provided in plurality.
4. The anti-loosening self-tapping screw according to claim 3, characterized in that: The body (1) comprises a first section (101), a second section (102) and a third section (103) which are connected in sequence, and the screwing portion (2) is located at an end of the third section (103) away from the second section (102); The first section (101) is arranged in a conical surface, the second section (102) is arranged in an arc surface, and the third section (103) is arranged in a cylindrical shape.
5. The anti-loosening self-tapping screw according to claim 4, characterized in that: The third section (103) includes a smooth section (104) and a threaded section (105); The threaded section (105) is connected to the second section (102), the smooth section (104) is located on a side of the threaded section (105) away from the second section (102), and the screwing portion (2) is located at an end of the smooth section (104) away from the threaded section (105).
6. The anti-loosening self-tapping screw according to claim 5, characterized in that: The plurality of curved portions (5) are evenly arranged on the threaded section (105) and the second section (102).
7. The anti-loosening self-tapping screw according to claim 1, characterized in that: The screwing notches include: a cross slot and a regular polygonal slot; The regular polygonal groove and the cross groove are overlapped, and the depth of the regular polygonal groove is smaller than the depth of the cross groove.