A head with a guide structure and a micro fastener

Abstract

The utility model discloses a kind of stud and micro fastener with guiding structure, micro fastener includes the stud with guiding structure, the stud with guiding structure includes stud body, guiding groove is provided on stud body, guiding groove upper end is located on stud body upper surface, stud body lower end is located in stud body, guiding groove lower end is communicated with fastening groove, fastening groove is located in stud body inside. The application is inserted by the guiding groove of larger inner diameter, and after insertion, the process of gradually changing from inside diameter to small can make the tool be well inserted in fastening groove, can effectively avoid the problem of tool insertion difficulty.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, specifically to a column head and miniature fastener with a guide structure. Background Technology

[0002] Fasteners are a wide range of mechanical parts used for fastening connections. They are used in various industries, including energy, electronics, electrical appliances, machinery, chemicals, metallurgy, mold making, and hydraulics. Most bolt heads have hexagonal slots with the same inner diameter at both ends, which are designed to match the inner diameter of an Allen wrench. However, in practice, because the slot and tool dimensions are identical, insertion can be difficult. Utility Model Content

[0003] This invention provides a column head with a guiding structure and a miniature fastener to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A column head with a guiding structure includes a column head body, on which a guide groove is provided. The upper end of the guide groove is located on the upper surface of the column head body, and the lower end of the column head body is located inside the column head body. The lower end of the guide groove is connected to a fastening groove, which is located inside the column head body.

[0006] Preferably, the inner diameter of the lower end of the guide groove is not less than the inner diameter of the fastening groove.

[0007] Preferably, the inner diameter of the upper end of the guide groove is larger than the inner diameter of the lower end of the guide groove, and the upper end of the guide groove transitions smoothly to the lower end.

[0008] A miniature fastener, comprising a column head with a guide structure as described above.

[0009] Preferably, it includes a fastening rod, which is fixedly connected to the lower end of the column head body, and a nut is threadedly connected to the fastening rod through a screw hole provided in the center of the nut;

[0010] A fastening pressure plate is fixedly connected to the fastening rod, and the fastening pressure plate is located between the column head body and the nut.

[0011] Preferably, a follower pad is provided between the column head body and the nut. The follower pad is located between the column head body and the fastening pressure plate. A through hole is provided at the center of the follower pad. The follower pad is slidably sleeved on the fastening rod through the through hole. A limit rod is fixedly connected to the lower surface of the follower pad. The limit rod can be inserted into the pressure groove provided on the nut.

[0012] Preferably, the upper surface of the follower pad is provided with a limiting groove, and the limiting groove is concentrically connected to the through hole;

[0013] A second locking tooth is provided inside the limiting groove;

[0014] The limiting groove can accommodate the column head body;

[0015] The lower surface of the column head body is provided with a first retaining tooth.

[0016] Preferably, the first and second locking teeth engage in one direction only.

[0017] Preferably, the nut is provided with a sliding groove, the sliding groove is connected to the pressure groove, a slider is slidably connected in the sliding groove, a pressure plate is slidably connected in the pressure groove, and the slider is fixedly connected to the pressure plate.

[0018] Preferably, a spring is provided between the pressure plate and the lower end of the pressure groove, and the two ends of the spring are fixedly connected to the pressure plate and the pressure groove, respectively.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] This application facilitates tool insertion by setting a guide groove with a larger inner diameter. After insertion, the gradual change in the inner radial direction allows the tool to be well inserted into the fastening groove, effectively avoiding the problem of tool insertion difficulty.

[0021] During tightening, the limiting rod on the lower side of the follower pad between the fastener and the tightening pressure plate can pass through the fastener or be placed beside it. Rotate the column head body to shorten the distance between the column head body and the nut. The limiting rod is inserted into the pressure groove. The spring presses the pressure plate upward, causing the limiting rod to move upward. The column head body moves into the limiting groove. The first and second locking teeth engage in one direction, restricting the column head body to rotate only in the tightening direction. During rotation, the spring is compressed, and the follower pad moves downward. After tightening, under the action of the spring, the column head body fits into the limiting groove. The second locking tooth restricts the rotation of the first locking tooth. Since the limiting rod is inserted into the pressure groove, the follower pad cannot rotate relative to the nut, thus ensuring that the column head body and the nut cannot rotate, preventing loosening during subsequent use. Attached Figure Description

[0022] Fig. 1 This is a schematic diagram of the column head body structure of this utility model;

[0023] Fig. 2 This is a top view of the column head body structure of this utility model;

[0024] Fig. 3 This is a schematic diagram of the fastener structure of this utility model;

[0025] Fig. 4This is a schematic diagram of the first locking tooth structure of this utility model;

[0026] Fig. 5 This is a schematic diagram of the second locking tooth structure of this utility model;

[0027] Fig. 6 This is a top view of the nut structure of this utility model.

[0028] In the diagram: 1. Column head body; 2. Fastening rod; 3. Fastening groove; 4. Guide groove; 5. Follower pad; 6. Limiting groove; 7. Through hole; 8. Limiting rod; 9. Nut; 10. Pressure groove; 11. Spring; 12. Pressure plate; 13. Slider; 14. Slide groove; 15. First locking tooth; 16. Second locking tooth; 17. Fastening pressure plate. Detailed Implementation

[0029] In this utility model, the terms "first," "second," etc., are used for descriptive purposes only and do not specifically refer to any order or sequence, nor are they intended to limit the utility model. They are merely used to distinguish protective components or operations described with the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0030] Example 1:

[0031] Please see Figs. 1-2 A column head with a guide structure includes a column head body 1, on which a guide groove 4 is provided. The upper end of the guide groove 4 is located on the upper surface of the column head body 1, and the lower end of the column head body 1 is located inside the column head body 1. The lower end of the guide groove 4 is connected to a fastening groove 3, which is located inside the column head body 1.

[0032] The inner diameter of the lower end of the guide groove 4 is not less than the inner diameter of the fastening groove 3.

[0033] The upper inner diameter of the guide groove 4 is larger than the lower inner diameter of the guide groove 4, and the upper and lower ends of the guide groove 4 are smoothly transitioned.

[0034] The working principle and beneficial effects of the above scheme are as follows:

[0035] During tightening, the Allen wrench is inserted into the guide groove 4, which is larger than the outer diameter of the Allen wrench. Since its inner diameter is larger than the outer diameter of the Allen wrench, it is very easy to insert the Allen wrench into the guide groove 4. It moves with the side wall of the guide groove 4 and is inserted into the fastening groove 3. It cooperates with the fastening groove 3 to transmit torque. Then, the Allen wrench is rotated, which drives the fastening rod 2 to rotate through the column body 1. It rotates relative to the nut 9 to complete the tightening.

[0036] This application facilitates tool insertion by setting a guide groove 4 with a larger inner diameter. After insertion, the gradual change in the inner radial direction allows the tool to be well inserted into the fastening groove 3, effectively avoiding the problem of tool insertion difficulty.

[0037] Example 2:

[0038] Please see Figs. 3-6 Based on Example 1, a miniature fastener includes a column head with a guide structure.

[0039] Includes a fastening rod 2, which is fixedly connected to the lower end of the column head body 1. The fastening rod 2 is threaded with a nut 9 through a screw hole set in the center of the nut 9.

[0040] A fastening pressure plate 17 is fixedly connected to the fastening rod 2, and the fastening pressure plate 17 is located between the column head body 1 and the nut 9.

[0041] A follower pad 5 is provided between the column head body 1 and the nut 9. The follower pad 5 is located between the column head body 1 and the fastening pressure plate 17. A through hole 7 is provided at the center of the follower pad 5. The follower pad 5 is slidably sleeved on the fastening rod 2 through the through hole 7. A limit rod 8 is fixedly connected to the lower surface of the follower pad 5. The limit rod 8 can be inserted into the pressure groove 10 provided on the nut 9.

[0042] The upper surface of the follower pad 5 is provided with a limiting groove 6, which is concentrically connected to the through hole 7.

[0043] A second locking tooth 16 is provided in the limiting groove 6;

[0044] The limiting groove 6 can accommodate the column head body 1;

[0045] The lower surface of the column head body 1 is provided with a first retaining tooth 15.

[0046] The first locking tooth 15 and the second locking tooth 16 engage in one direction.

[0047] The nut 9 is provided with a sliding groove 14, which is connected to the pressure groove 10. A slider 13 is slidably connected in the sliding groove 14, and a pressure plate 12 is slidably connected in the pressure groove 10. The slider 13 is fixedly connected to the pressure plate 12.

[0048] A spring 11 is provided between the pressure plate 12 and the lower end of the pressure groove 10, and the two ends of the spring 11 are fixedly connected to the pressure plate 12 and the pressure groove 10 respectively.

[0049] The working principle and beneficial effects of the above scheme are as follows:

[0050] During tightening, the limiting rod 8 on the lower side of the follower pad 5 between the fastener and the fastening pressure plate 17 can pass through the fastener or be placed beside it. Rotate the column head body 1 to shorten the distance between the column head body 1 and the nut 9. The limiting rod 8 is inserted into the pressure groove 10. The spring 11 presses the pressure plate 12 upward, causing the limiting rod 8 to move upward. The column head body 1 moves into the limiting groove 6. The first locking tooth 15 and the second locking tooth 16 engage in one direction, restricting the column head body 1 to rotate only in the tightening direction. When rotating, the spring 11 is compressed, and the follower pad 5 moves downward. After tightening, under the action of the spring 11, the column head body 1 and the limiting groove 6 are in contact. The second locking tooth 16 restricts the rotation of the first locking tooth 15. Since the limiting rod 8 is inserted into the pressure groove 10, the follower pad 5 cannot rotate relative to the nut 9, thus ensuring that the column head body 1 and the nut 9 cannot rotate, preventing loosening in subsequent use.

[0051] The slider 13 and the groove 14 ensure the stability of the pressure plate 12 moving up and down, and thus ensure the stability of the follower pad 5 moving.

[0052] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A column head with a guiding structure, characterized in that, It includes a column head body, on which a guide groove is provided. The upper end of the guide groove is located on the upper surface of the column head body, and the lower end of the column head body is located inside the column head body. The lower end of the guide groove is connected to a fastening groove, which is located inside the column head body.

2. A column head with a guide structure according to claim 1, characterized in that, The inner diameter of the lower end of the guide groove is not less than the inner diameter of the fastening groove.

3. A column head with a guide structure according to claim 1, characterized in that, The inner diameter of the upper end of the guide groove is larger than the inner diameter of the lower end of the guide groove, and the upper end of the guide groove transitions smoothly to the lower end.

4. A miniature fastener, characterized in that, Includes a column head with a guide structure as described in any one of claims 1-3.

5. A miniature fastener according to claim 4, characterized in that, Includes a fastening rod, which is fixedly connected to the lower end of the column head body, and a nut is threaded onto the fastening rod through a screw hole set in the center of the nut; A fastening pressure plate is fixedly connected to the fastening rod, and the fastening pressure plate is located between the column head body and the nut.

6. A miniature fastener according to claim 5, characterized in that, A follower pad is provided between the column head body and the nut. The follower pad is located between the column head body and the fastening pressure plate. A through hole is provided at the center of the follower pad. The follower pad is slidably sleeved on the fastening rod through the through hole. A limit rod is fixedly connected to the lower surface of the follower pad. The limit rod can be inserted into the pressure groove provided on the nut.

7. A miniature fastener according to claim 6, characterized in that, The upper surface of the follower pad is provided with a limiting groove, which is concentrically connected to the through hole; A second locking tooth is provided inside the limiting groove; The limiting groove can accommodate the column head body; The lower surface of the column head body is provided with a first retaining tooth.

8. A miniature fastener according to claim 7, characterized in that, The first and second locking teeth engage in a one-way manner.

9. A miniature fastener according to claim 6, characterized in that, The nut has a sliding groove that communicates with the pressure groove. A slider is slidably connected in the sliding groove, and a pressure plate is slidably connected in the pressure groove. The slider and the pressure plate are fixedly connected.

10. A miniature fastener according to claim 9, characterized in that, A spring is installed between the pressure plate and the lower end of the pressure groove, with both ends of the spring fixedly connected to the pressure plate and the pressure groove, respectively.

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