Unthreaded fastener

Abstract

The utility model relates to the technical field of fasteners, in particular to an unthreaded fastener which comprises a fixing sleeve, a through hole is formed in the fixing sleeve, a limiting groove is formed in the middle of the through hole, a welding hole penetrating through the surface of the fixing sleeve is formed in the outer end of the limiting groove, a welding plate is fixed at the tail end of the fixing sleeve, and a threaded hole is formed in the fixing sleeve. Reinforcing ribs are fixed between the surface of the welding plate and the surface of the fixing sleeve. The fastening piece has the beneficial effects that the folding deformation part of the limiting strip is fixedly connected with the inner surface of the fixing sleeve in a welding manner, so that the clamping installation connection between the connecting column and the fixing sleeve is maintained, the relative rotation condition is avoided, and the stability of the fastening piece is improved; friction resistance between the limiting groove and the folding deformation part of the limiting strip is improved through the anti-slip strip, relative sliding between the limiting groove and the folding deformation part of the limiting strip when the pressing plate is pulled is prevented, and the stability of the fastener is improved.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and in particular to a threadless fastener. Background Technology

[0002] Automotive fasteners, as a type of connection component specifically designed for the automotive industry, primarily function to provide a secure connection point, ensuring that the structural integrity and functionality of various components of a vehicle are maintained under conditions of high speed, complex road conditions, and different climates.

[0003] Even during normal daily driving, vehicles will vibrate / shake due to road conditions. Bolts and retainers are connected by threads, and under the influence of vibration / shaking, the threads between the bolts and retainers may loosen. Therefore, there is a need for a threadless fastener for assembling automotive parts to ensure the connection strength of automotive parts.

[0004] For example, the existing Chinese patent publication number "CN221374200U" provides a threadless fastener, belonging to the field of fastener technology, which solves the problem of loosening of the threads between the bolt and the fixing sleeve under the influence of vibration / shaking. It includes a fixing sleeve and a fastener that is interference-fitted with it. The fixing sleeve contains a through hole and several limiting grooves communicating with the through hole. The fastener includes a front connecting post, a rear connecting post, and two semi-circular connecting parts fixedly connected between them. Several stress concentration points exist in the semi-circular connecting parts along their length.

[0005] This device can fix the fastener and the fixed sleeve by the cooperation of the fastener and the fixed sleeve. After the fastener is embedded in the fixed sleeve, under the riveting, one end of the fastener is stationary and the other end is stressed, so that the fastener deforms and forms a limiting part that is interference fit in the limiting groove to fix the two. Furthermore, if the fastener and the fixed part are subjected to shaking and vibration, the fastener will not deform and will return to its original shape, so that the two will not loosen or break.

[0006] Existing threadless fasteners, during use, only secure the fastener and the fixing sleeve through the snap-fit ​​between the limiting part and the limiting groove. There is a possibility of relative rotation between the fastener and the fixing sleeve, which fails to limit the rotation between the fastener and the fixing sleeve. This is not conducive to the fastening of external structures. Moreover, the snap-fit ​​between the limiting part and the limiting groove is not tight enough, and relative sliding can easily occur between the outer surface of the limiting part and the inner surface of the limiting groove. When the pressing plate and the connecting column are pulled outward, it is easy to cause mutual sliding between the limiting part and the limiting groove, which can lead to deformation of the limiting part and its return to its original shape, resulting in loosening or even separation between the fixing sleeve and the fastener.

[0007] Therefore, a threadless fastener is proposed. Utility Model Content

[0008] The purpose of this invention is to address the shortcomings of existing technologies where there is relative rotation between the fastener and the fixed sleeve, which fails to limit the rotation between the fastener and the fixed sleeve and is not conducive to the fastening of external structures. Therefore, this invention proposes a threadless fastener.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] Design a threadless fastener, including a fixing sleeve, the fixing sleeve having a through hole inside, a limiting groove in the middle of the through hole, a welding hole penetrating the surface of the fixing sleeve at the outer end of the limiting groove, a welding plate fixed to the tail end of the fixing sleeve, a reinforcing rib fixed between the surface of the welding plate and the surface of the fixing sleeve, and a fastening mechanism inserted into the through hole; the fastening mechanism includes a connecting post, a guide post, and a connecting cylinder, the connecting post slidingly inserted into the through hole, its outer end protruding outward from the head end of the fixing sleeve, a pressing plate fixed to the outer end of the connecting post, the guide post fixed to the inner end of the connecting post and slidingly inserted into the through hole, a limiting strip connected to the inner end of the connecting post and located outside the guide post, anti-slip strips evenly fixed to the outer side of the limiting strip, the inner end of the limiting strip fixedly connected to the inner end of the connecting cylinder, the connecting cylinder slidingly passing through the through hole and protruding outward from the side of the welding plate.

[0011] Furthermore, a first snap-fit ​​rack is fixed to the surface of the connecting post, and a second snap-fit ​​rack is fixed to the inner surface of the through hole near the end of the fixing sleeve. The second snap-fit ​​rack and the first snap-fit ​​rack are engaged and snap-fit ​​connected.

[0012] Furthermore, the fixing sleeve is a cylindrical structure, and the limiting groove is an annular structure, perpendicular to the axial direction of the fixing sleeve.

[0013] Furthermore, the welding plate has a circular structure and is perpendicular to the fixing sleeve.

[0014] Furthermore, the connecting column is a cylindrical structure, the pressing plate is a circular plate structure, and the guide column is a cylindrical structure with a diameter smaller than that of the connecting column.

[0015] Furthermore, the limiting strip is a long strip structure with an arc-shaped cross-section, and a gap is provided between the two limiting strips. The anti-slip strip is an arc-shaped strip structure and is perpendicular to the side of the limiting strip.

[0016] Furthermore, one end of the guide post is inserted into the inner end of the connecting cylinder, and the diameter of the connecting cylinder is equal to the diameter of the connecting post.

[0017] Furthermore, both the first and second snap-fit ​​racks are parallel to the axial direction of the fixed sleeve, and the second snap-fit ​​rack is interlocked with the first snap-fit ​​rack at an interval.

[0018] The threadless fastener proposed in this utility model has the following advantages:

[0019] 1. This utility model provides a through hole in the middle of the fixed sleeve. When the limiting strip is compressed and deformed inside the through hole, it folds and inserts into the limiting groove. The limiting strip is then welded and fixed to the inner surface of the fixed sleeve through a welding hole, maintaining a welded and fixed connection between the folded and deformed part of the limiting strip and the inner surface of the fixed sleeve. Furthermore, after the connecting post is inserted into the through hole, the second snap-fit ​​rack and the first snap-fit ​​rack are snap-fitted and positioned, thereby maintaining the snap-fit ​​installation connection between the connecting post and the fixed sleeve and preventing relative rotation, thus improving the stability of the fastener.

[0020] 2. This utility model provides a guide post between the connecting post and the connecting cylinder, and connects a limiting strip to the outside of the guide post. Additionally, anti-slip strips are uniformly fixed to the outer surface of the limiting strip. Therefore, by pressing, the connecting post is inserted into the through hole inside the fixing sleeve, and simultaneously, the guide post is inserted into the connecting cylinder, causing the limiting strip to deform under pressure and fold into the limiting groove. Furthermore, the anti-slip strip increases the frictional resistance between the limiting groove and the folded deformation portion of the limiting strip, preventing relative sliding between the limiting groove and the folded deformation portion of the limiting strip when the pressing plate is pulled, thus improving the stability of the fastener. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This utility model Figure 1 A sectional view of the fixed sleeve;

[0023] Figure 3 This utility model Figure 2 Enlarged view of point A;

[0024] Figure 4 This utility model Figure 1 A schematic diagram of the connecting rod, limiting strip, and connecting cylinder;

[0025] Figure 5 This utility model Figure 4 Enlarged view of point B;

[0026] Figure 6 This utility model Figure 1 A partial sectional view of the guide post and limit bar.

[0027] In the diagram: 1. Fixing sleeve; 2. Welding hole; 3. First snap-fit ​​rack; 4. Pressing plate; 5. Reinforcing rib; 6. Welding plate; 7. Connecting cylinder; 8. Through hole; 9. Limiting groove; 10. Second snap-fit ​​rack; 11. Limiting strip; 12. Anti-slip strip; 13. Guide post; 14. Connecting post. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Example 1

[0030] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The diagram shows a threadless fastener, including a fixing sleeve 1. The fixing sleeve 1 has a through hole 8 inside, a limiting groove 9 in the middle of the through hole 8, a welding hole 2 at the outer end of the limiting groove 9 that penetrates the surface of the fixing sleeve 1, a welding plate 6 fixed to the tail end of the fixing sleeve 1, a reinforcing rib 5 fixed between the surface of the welding plate 6 and the surface of the fixing sleeve 1, and a fastening mechanism inserted into the through hole 8.

[0031] The fixing sleeve 1 is a cylindrical structure, and the limiting groove 9 is an annular structure, which is perpendicular to the axis of the fixing sleeve 1.

[0032] The welding plate 6 has a circular structure and is perpendicular to the fixing sleeve 1.

[0033] The fastening mechanism includes a connecting post 14, a guide post 13, and a connecting cylinder 7. The connecting post 14 is slidably inserted into the through hole 8, and its outer end protrudes outward from the head end of the fixing sleeve 1. A pressing plate 4 is fixed to the outer end of the connecting post 14. The guide post 13 is fixed to the inner end of the connecting post 14 and is slidably inserted into the through hole 8.

[0034] The connecting post 14 is a cylindrical structure, the pressing plate 4 is a circular plate structure, and the guide post 13 is a cylindrical structure with a diameter smaller than that of the connecting post 14.

[0035] A limiting strip 11 is connected to the inner end of the connecting post 14 and located outside the guide post 13. Anti-slip strips 12 are evenly fixed on the outer side of the limiting strip 11. The inner end of the limiting strip 11 is fixedly connected to the inner end of the connecting cylinder 7. The connecting cylinder 7 slides through the through hole 8 and protrudes outward from the side of the welding plate 6.

[0036] A guide post 13 is provided between the connecting post 14 and the connecting cylinder 7, and a limiting strip 11 is connected to the outside of the guide post 13. Anti-slip strips 12 are uniformly fixed on the outer surface of the limiting strip 11. Thus, the connecting post 14 is inserted into the through hole 8 inside the fixing sleeve 1 by pressing the plate 4. At the same time, the guide post 13 is inserted into the connecting cylinder 7, so that the limiting strip 11 is deformed by pressure and folded into the limiting groove 9. Moreover, the anti-slip strip 12 increases the frictional resistance between the limiting groove 9 and the folded deformation part of the limiting strip 11, preventing relative sliding between the limiting groove 9 and the folded deformation part of the limiting strip 11 when the pressing plate 4 is pulled, thereby improving the stability of the fastener.

[0037] The limiting strip 11 is a long strip structure with an arc-shaped cross-section, and there is a gap between the two limiting strips 11. The anti-slip strip 12 is an arc-shaped strip structure and is perpendicular to the side of the limiting strip 11.

[0038] One end of the guide post 13 is inserted into the inner end of the connecting cylinder 7, and the diameter of the connecting cylinder 7 is equal to the diameter of the connecting post 14.

[0039] Example 2

[0040] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The diagram shows a threadless fastener, including a fixing sleeve 1. The fixing sleeve 1 has a through hole 8 inside, a limiting groove 9 in the middle of the through hole 8, a welding hole 2 at the outer end of the limiting groove 9 that penetrates the surface of the fixing sleeve 1, a welding plate 6 fixed to the tail end of the fixing sleeve 1, a reinforcing rib 5 fixed between the surface of the welding plate 6 and the surface of the fixing sleeve 1, and a fastening mechanism inserted into the through hole 8.

[0041] By providing a through hole 8 in the middle of the fixed sleeve 1, when the limiting strip 11 is squeezed and deformed inside the through hole 8, it will fold and be inserted into the limiting groove 9. The limiting strip 11 and the inner surface of the fixed sleeve 1 are welded and fixed through the welding hole 2, so as to maintain the welded and fixed connection between the folded deformation part of the limiting strip 11 and the inner surface of the fixed sleeve 1.

[0042] A first snap-fit ​​rack 3 is fixed to the surface of the connecting post 14, and a second snap-fit ​​rack 10 is fixed to the inner surface of the through hole 8 near the head end of the fixing sleeve 1. The second snap-fit ​​rack 10 and the first snap-fit ​​rack 3 are engaged and snap-fit ​​connected.

[0043] After the connecting post 14 is inserted into the through hole 8, the second snap-fit ​​rack 10 and the first snap-fit ​​rack 3 are snap-fitted and positioned together, thereby maintaining the snap-fit ​​installation connection between the connecting post 14 and the fixed sleeve 1, preventing relative rotation and improving the stability of the fastener.

[0044] The first snap-fit ​​rack 3 and the second snap-fit ​​rack 10 are both parallel to the axial direction of the fixed sleeve 1, and the second snap-fit ​​rack 10 is snap-fitted to the first snap-fit ​​rack 3 at intervals.

[0045] Working method: By setting a through hole 8 in the middle of the fixed sleeve 1, when the limiting strip 11 is squeezed and deformed inside the through hole 8, it folds and is inserted into the limiting groove 9. The limiting strip 11 and the inner surface of the fixed sleeve 1 are welded and fixed through the welding hole 2, so as to maintain the welded and fixed connection between the folded deformation part of the limiting strip 11 and the inner surface of the fixed sleeve 1.

[0046] Furthermore, after the connecting post 14 is inserted into the through hole 8, the second snap-fit ​​rack 10 and the first snap-fit ​​rack 3 are snap-fitted and positioned together, thereby maintaining the snap-fit ​​installation connection between the connecting post 14 and the fixed sleeve 1, preventing relative rotation and improving the stability of the fastener.

[0047] A guide post 13 is provided between the connecting post 14 and the connecting cylinder 7, and a limiting strip 11 is connected to the outside of the guide post 13. Anti-slip strips 12 are uniformly fixed on the outer surface of the limiting strip 11. Thus, the connecting post 14 is inserted into the through hole 8 inside the fixing sleeve 1 by pressing the plate 4. At the same time, the guide post 13 is inserted into the connecting cylinder 7, so that the limiting strip 11 is deformed by pressure and folded into the limiting groove 9. Moreover, the anti-slip strip 12 increases the frictional resistance between the limiting groove 9 and the folded deformation part of the limiting strip 11, preventing relative sliding between the limiting groove 9 and the folded deformation part of the limiting strip 11 when the pressing plate 4 is pulled, thereby improving the stability of the fastener.

[0048] 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. A threadless fastener comprising a fixing sleeve (1), characterised in that: The fixed sleeve (1) has a through hole (8) inside, a limiting groove (9) is opened in the middle of the through hole (8), a welding hole (2) is opened at the outer end of the limiting groove (9) to penetrate the surface of the fixed sleeve (1), a welding plate (6) is fixed at the tail end of the fixed sleeve (1), a reinforcing rib (5) is fixed between the surface of the welding plate (6) and the surface of the fixed sleeve (1), and a fastening mechanism is inserted into the through hole (8). The fastening mechanism includes a connecting column (14), a guide column (13), and a connecting cylinder (7). The connecting column (14) is slidably inserted into the through hole (8), and its outer end protrudes outward from the head end of the fixing sleeve (1). A pressing plate (4) is fixed to the outer end of the connecting column (14). The guide column (13) is fixed to the inner end of the connecting column (14) and slidably inserted into the through hole (8). A limiting strip (11) is connected to the inner end of the connecting column (14) and located outside the guide column (13). Anti-slip strips (12) are evenly fixed to the outer side of the limiting strip (11). The inner end of the limiting strip (11) is fixedly connected to the inner end of the connecting cylinder (7). The connecting cylinder (7) slides through the through hole (8) and protrudes outward from the side of the welding plate (6).

2. A threadless fastener according to claim 1, wherein: The surface of the connecting post (14) is fixed with a first snap-fit ​​rack (3), and the inner surface of the through hole (8) and near the head end of the fixing sleeve (1) are fixed with a second snap-fit ​​rack (10). The second snap-fit ​​rack (10) and the first snap-fit ​​rack (3) are engaged and snap-fit ​​connected.

3. A threadless fastener as defined in claim 1, wherein: The fixing sleeve (1) is a cylindrical structure, and the limiting groove (9) is an annular structure and is perpendicular to the axis of the fixing sleeve (1).

4. A threadless fastener as defined in claim 1, wherein: The welding plate (6) has a circular structure and is perpendicular to the fixing sleeve (1).

5. A threadless fastener as defined in claim 1, wherein: The connecting column (14) is a cylindrical structure, the pressing plate (4) is a circular plate structure, and the guide column (13) is a cylindrical structure with a diameter smaller than that of the connecting column (14).

6. A threadless fastener as defined in claim 1, wherein: The limiting strip (11) is a long strip structure with an arc-shaped cross-section, and there is a gap between the two limiting strips (11). The anti-slip strip (12) is an arc-shaped strip structure and is perpendicular to the side of the limiting strip (11).

7. A threadless fastener as defined in claim 1, wherein: One end of the guide post (13) is inserted into the inner end of the connecting cylinder (7), and the diameter of the connecting cylinder (7) is equal to the diameter of the connecting post (14).

8. A threadless fastener as defined in claim 2, wherein: The first snap-fit ​​rack (3) and the second snap-fit ​​rack (10) are both parallel to the axial direction of the fixed sleeve (1), and the second snap-fit ​​rack (10) and the first snap-fit ​​rack (3) are snap-fitted together at intervals.

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