Torsion-resistant bolt barrel structure

Abstract

The utility model discloses an anti-torsion bolt thread insert structure, which relates to the technical field of bolt thread inserts and comprises a thread insert body, external threads are arranged on the outer side of the thread insert body, four slots are arranged on the outer side wall of the thread insert body in a surrounding manner, inclined planes are arranged at the bottom ends of the inner side walls of the four slots, and the inclined planes are arranged on the outer side wall of the thread insert body. And plug pin blocks are inserted into the top ends of the interiors of the four slots. The four inserting grooves are formed in the outer side of the threaded sleeve body, the plug pin blocks are arranged in the inserting grooves in an inserted mode, the plug pin blocks move outwards under the action of the inclined faces in the inserting process, the extrusion range on a workpiece is gradually increased, and therefore the effect of improving the fastening performance of the threaded sleeve body is achieved; an extension groove is formed in one side of the through groove, a pressing block is arranged in the extension groove, an inclined extrusion face is arranged on the outer side of the pressing block, and the extrusion acting force on the workpiece is increased in the insertion process of the plug pin block through the design of the inclined structure of the extrusion face.

Description

Technical Field

[0001] The utility model relates to the technical field of dowel bushings, and particularly relates to a torsion-resistant dowel bushing structure. Background Art

[0002] The structure of a dowel bushing is a bushing body with four pins embedded around the external thread. The realization of the torsion resistance is achieved by the locking action of the pins, which firmly combines the bushing body and the workpiece into one. In some high-torsion environments or soft base material environments, the current dowel bushings still experience coaxial rotation during the tightening process.

[0003] For example, an internally locked dowel bushing with the publication number CN219101834U includes a tubular bushing body and internal and external threads respectively arranged inside and outside the bushing body. A group of annular grooves are arranged in parallel along the radial direction of the internal thread, and a plurality of locking points are evenly arranged inside the annular grooves; the T-shaped keyway is composed of a keyway guiding part and a keyway fixing part. The keyway guiding part and the keyway fixing part are arranged in sequence from the external thread of the bushing body inward, and both the keyway guiding part and the keyway fixing part are rectangular structures. The key pin is composed of a transition part and an acting part. The key pin of the utility model has a guiding effect, and it is not easy to break under force during the installation of the product. At the same time, the locking points on one circle of the internal thread can lock the screwed-in bolt, achieving the effect of preventing loosening and backstepping.

[0004] The above technical solutions have some problems in practical applications. After the dowel bushing is installed, its fastening performance is affected by the extrusion effect of the dowel on the workpiece after insertion. In traditional technologies, the extrusion effect of the dowel on the workpiece before and after insertion is the same, and the deformation of the workpiece caused by frictional extrusion during the insertion process of the dowel will affect the stability of the bushing after installation.

[0005] Therefore, it is very necessary to invent a torsion-resistant dowel bushing structure to solve the above problems. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a torsion-resistant dowel bushing structure to solve the problems raised in the above background art.

[0007] To achieve the above object, the present utility model provides the following technical solution: a torsional resistance plug and sleeve structure, including a sleeve body, an external thread is provided on the outer side of the sleeve body, four slots are circumferentially opened on the outer side wall of the sleeve body, inclined surfaces are provided at the bottom ends of the inner side walls of the four slots, plug blocks are inserted at the top ends of the four slots, and the outer side surface of the plug block is an arc-shaped structure corresponding to the sleeve body. Arc-shaped surfaces are provided at the bottom ends of both sides of the plug block. A through groove is penetrated through the middle of the top end of the plug block. One inner side wall of the through groove is an inclined structure, and a positioning groove is opened in the middle of one inner side wall of the through groove. An extension groove is penetrated through the bottom of the positioning groove. A pressing block is inserted in the extension groove. A positioning block is fixedly provided in the middle of the pressing block, and the positioning block is arranged inside the positioning groove.

[0008] Preferably, an extension block is fixedly provided in the middle of the inner side of the pressing block, and the inner side of the extension block is an arc-shaped structure.

[0009] Preferably, a fixing block is fixedly provided in the middle of the other inner side wall of the through groove, and the fixing block corresponds to the extension block.

[0010] Preferably, the outer side wall of the pressing block is provided with an inclined extrusion surface, and the bottom end of the extrusion surface is flush with the outer side of the plug block.

[0011] Preferably, anti-slip grooves are opened on both sides at the notch of the extension groove, and the anti-slip grooves are in a "V" shape structure.

[0012] Preferably, there are multiple anti-slip grooves, and the multiple anti-slip grooves are arranged at equal intervals.

[0013] The technical effects and advantages of the present utility model:

[0014] 1. By opening four slots on the outer side of the sleeve body in the present utility model, inclined surfaces are provided at the bottom ends of the slots, and plug blocks are inserted into the slots. During the insertion process, the plug blocks move outward under the action of the inclined surfaces and gradually increase the extrusion range of the workpiece to achieve the effect of improving the fastening property of the sleeve body. By opening a through groove in the plug block, an extension groove is opened on one side of the through groove, a pressing block is arranged in the extension groove, and an inclined extrusion surface is arranged on the outer side of the pressing block. The design of the inclined structure of the extrusion surface enables the plug block to increase the extrusion force on the workpiece during the insertion process, thereby further improving the fastening property of the sleeve body after installation;

[0015] 2. The utility model sets anti-slip grooves at the notch of the extension groove and a positioning block in the middle of the pressing block. During the process of the pressing block following the insertion of the pin block, the pressing block is extruded by its outer extrusion surface to mutually extrude the fixing block inside the pin block. At this time, the extension groove on the outside of the pin block is extruded and expands outwards. At this time, the anti-slip groove at the notch of the extension groove fits with the inner wall of the workpiece to limit the rotation of the pin block, thereby improving the fastening property of the sleeve body and enhancing the anti-torsion effect of the sleeve body. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0017] Figure 2 It is a schematic diagram of the structure of the sleeve body of the present utility model.

[0018] Figure 3 It is a schematic diagram of the structure of the pin block of the present utility model.

[0019] Figure 4 It is a side schematic diagram of the structure of the pin block of the present utility model.

[0020] Figure 5 It is a schematic diagram of the structure of the pressing block of the present utility model.

[0021] In the figure: 1. Sleeve body; 2. External thread; 3. Slot; 4. Inclined surface; 5. Pin block; 6. Arc surface; 7. Through groove; 8. Positioning groove; 9. Extension groove; 10. Pressing block; 11. Positioning block; 12. Extension block; 13. Fixing block; 14. Extrusion surface; 15. Anti-slip groove. Detailed Embodiment

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] The present utility model provides an anti-torsion pin sleeve structure as shown in Figures 1-5 which includes a sleeve body 1. An external thread 2 is provided on the outside of the sleeve body 1. Four slots 3 are circumferentially formed on the outer side wall of the sleeve body 1, and inclined surfaces 4 are provided at the bottom ends of the inner side walls of the four slots 3.

[0024] Specifically, plug blocks 5 are inserted at the inner tops of the four slots 3, and the outer side surfaces of the plug blocks 5 are arranged in an arc structure corresponding to the sleeve body 1. Arc surfaces 6 are arranged at both bottom ends of the two sides of the plug block 5. The design of the arc surface 6 facilitates the cooperation between the plug block 5 and the inclined surface 4;

[0025] More specifically, a through groove 7 is penetrated and opened in the middle of the top end of the plug block 5. One inner wall of the through groove 7 is arranged in an inclined structure, and a positioning groove 8 is opened in the middle of one inner wall of the through groove 7. An extension groove 9 is penetrated and opened at the bottom of the positioning groove 8. A pressing block 10 is inserted in the extension groove 9. A positioning block 11 is fixedly arranged in the middle of the pressing block 10, and the positioning block 11 is arranged inside the positioning groove 8. An extension block 12 is fixedly arranged in the middle of the inner side of the pressing block 10, and the inner side of the extension block 12 is arranged in an arc structure;

[0026] And, a fixing block 13 is fixedly arranged in the middle of the other inner wall of the through groove 7, and the fixing block 13 corresponds to the extension block 12. The cooperation between the fixing block 13 and the arc structure on the inner side of the extension block 12 ensures that the fixing block 13 and the extension block 12 will not slide and be misaligned when they are mutually extruded. An inclined extrusion surface 14 is arranged on the outer side wall of the pressing block 10, and the bottom end of the extrusion surface 14 is flush with the outer side of the plug block 5. Anti-slip grooves 15 are opened on both sides at the notch of the extension groove 9, and the anti-slip grooves 15 are arranged in a "V" shape. There are multiple anti-slip grooves 15, and the multiple anti-slip grooves 15 are arranged at equal intervals. The "V" shape can improve the friction between the anti-slip grooves 15 and the inner wall of the workpiece reserved hole.

[0027] Working principle of the utility model:

[0028] When the device is installed, the sleeve body 1 is screwed into the reserved hole of the workpiece through the external thread 2. After the sleeve body 1 is completely screwed in, use a tool to knock the plug block 5 and the pressing block 10 into the slot 3. During this process, the arc surface 6 at the bottom end of the plug block 5 is guided by the inclined surface 4 at the bottom end of the slot 3, so that the extrusion effect of the plug block 5 on the reserved hole of the workpiece is improved, thereby the fastening property after the installation of the sleeve body 1 can be improved;

[0029] During the process of the pressing block 10 being inserted into the through groove 7 in the middle of the plug block 5, the pressing block 10 is guided by the extrusion surface 14 on its outer side and the inner wall of the workpiece reserved hole, so that the pressing block 10 extrudes the fixing block 13 inside the through groove 7 inward. Since the inner wall of the through groove 7 is arranged in an inclined structure, during the insertion process of the pressing block 10, the gap between the fixing block 13 and the extension block 12 is reduced, so that the extension block 12 and the positioning block 11 extrude the positioning groove 8, thereby enabling the plug block 5 to open outward along the extension groove 9. At this time, the anti-slip grooves 15 on the outer side of the plug block 5 are attached to the inner wall of the workpiece reserved hole to improve the anti-slip effect and fastening property of the plug block 5.

[0030] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A torsion-resistant split pin bushing structure, comprising a bushing body (1), characterized in that: An external thread (2) is provided on the outer side of the sleeve body (1). Four slots (3) are circumferentially formed on the outer side wall of the sleeve body (1). Inclined surfaces (4) are provided at the bottom ends of the inner side walls of the four slots (3). Plug blocks (5) are inserted at the top ends of the four slots (3). The outer side surface of the plug block (5) is arranged in an arc structure corresponding to the sleeve body (1). Arc surfaces (6) are provided at the bottom ends on both sides of the plug block (5). A through groove (7) is formed through the middle of the top end of the plug block (5). One inner side wall of the through groove (7) is arranged in an inclined structure, and a positioning groove (8) is formed in the middle of one inner side wall of the through groove (7). An extension groove (9) is formed through the bottom of the positioning groove (8). A pressing block (10) is inserted in the extension groove (9). A positioning block (11) is fixedly arranged in the middle of the pressing block (10), and the positioning block (11) is arranged in the positioning groove (8).

2. The anti-torsion insert bolt sleeve structure according to claim 1, characterized in that: An extension block (12) is fixedly arranged in the middle of the inner side of the pressing block (10), and the inner side of the extension block (12) is arranged in an arc structure.

3. The anti-torsion plug screw sleeve structure according to claim 2, characterized in that: A fixing block (13) is fixedly arranged in the middle of the other inner side wall of the through groove (7), and the fixing block (13) corresponds to the extension block (12).

4. The anti-torsion insert bushing structure according to claim 3, characterized in that: An inclined extrusion surface (14) is arranged on the outer side wall of the pressing block (10), and the bottom end of the extrusion surface (14) is flush with the outer side of the plug block (5).

5. The anti-torsion plug screw sleeve structure according to claim 4, characterized in that: Anti-slip grooves (15) are formed on both sides at the notch of the extension groove (9), and the anti-slip grooves (15) are arranged in a "V" shape structure.

6. The anti-torsion plug screw sleeve structure according to claim 5, characterized in that: A plurality of the anti-slip grooves (15) are provided, and the plurality of anti-slip grooves (15) are arranged at equal intervals.

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