Stainless steel expansion screw capable of preventing teeth from falling off

Abstract

The utility model relates to the technical field of fasteners, in particular to a stainless steel expansion screw capable of preventing teeth from falling off, which comprises a baffle and a connecting sleeve fixed at the bottom of the baffle. An expansion sleeve is fixed at the bottom of the connecting sleeve; a threaded rod is arranged in the connecting sleeve and the expansion sleeve, and an expansion part is fixed to the bottom of the threaded rod. The outer part of the threaded rod is in threaded connection with a nut; a first movable groove and a second movable groove are formed in the top of the baffle, and a first supporting strip and a second supporting strip are movably connected into the first movable groove and the second movable groove through a first movable pin and a second movable pin correspondingly. A first limiting strip and a second limiting strip which abut against the top of the nut are correspondingly fixed to the inner side of the first supporting strip and the inner side of the second supporting strip respectively, and the expansion screw can limit the nut, so that the phenomenon of tooth disengaging or loosening of the nut is avoided, the connection stability of the expansion screw is guaranteed, and potential safety hazards are avoided.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, specifically to a stainless steel expansion screw that prevents tooth dislodgement. Background Technology

[0002] Expansion bolts are a common type of fastener widely used in construction, machinery, and electrical appliances. They typically consist of a screw, an expansion sleeve, and a nut. Tightening the nut causes the expansion sleeve to expand, thus securing the object to a wall, floor, or other foundation.

[0003] However, during use, especially under conditions of vibration and impact, the nuts of existing expansion bolts are prone to loosening or even tooth breakage, leading to failure of the expansion bolt connection and posing a significant safety hazard.

[0004] To address this, a stainless steel expansion screw designed to prevent tooth dislodgement is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a stainless steel expansion screw that prevents teeth from falling out.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A stainless steel expansion screw with anti-loosening teeth, comprising:

[0008] Baffle, and connecting sleeve fixed to the bottom of the baffle;

[0009] An expansion sleeve is fixed to the bottom of the connecting sleeve;

[0010] The connecting sleeve and the expansion sleeve are provided with threaded rods inside, and an expansion part is fixed at the bottom of the threaded rods;

[0011] The threaded rod is externally threaded with a nut.

[0012] The top of the baffle is provided with a first movable groove and a second movable groove, and a first support bar and a second support bar are respectively movably connected in the first movable groove and the second movable groove by a first movable pin and a second movable pin, respectively.

[0013] The first support bar and the second support bar are respectively fixed with a first limiting bar and a second limiting bar that abut against the top of the nut.

[0014] Preferably, the threaded rod is externally provided with a washer located between the nut and the baffle.

[0015] Preferably, the first support bar and the second support bar are fixed by a fixing component, the fixing component including a first connecting groove and a second connecting groove respectively opened on the first support bar and the second support bar;

[0016] Fixing components are provided in the first connecting groove and the second connecting groove.

[0017] Preferably, the fixing member is composed of a fixing plate, a first leg, and a second leg. The first leg and the second leg are fixed to one end of the fixing plate. The first leg and the second leg are respectively disposed inside the first connecting groove and the second connecting groove. One end of the fixing plate abuts against the threaded rod.

[0018] Preferably, a fixing strip that abuts against the threaded rod is provided between the first leg and the second leg. The first leg is fixed to one end of the fixing strip by a first fixing bolt, and the second leg is fixed to the other end of the fixing strip by a second fixing bolt.

[0019] Preferably, the outer wall of the expansion sleeve is fixed with fixing teeth.

[0020] Preferably, a stress-bearing strip is fixed to the top of the baffle.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] Since the first support bar is movably connected to the first movable groove using the first movable pin, the angle of the first support bar can be directly adjusted. Similarly, since the second support bar is movably connected to the second movable groove using the second movable pin, the angle of the second support bar can be directly adjusted. When the first and second support bars are closed, the first and second limiting strips will abut against the top of the nut. With the cooperation of the first and second support bars and the first and second limiting strips, the nut can be limited. Compared with the existing ones, this utility model can limit the nut, thereby preventing the nut from coming loose or becoming dislodged, thus ensuring the connection stability of the expansion screw and avoiding safety hazards. Attached Figure Description

[0023] Figure 1 This is a front structural diagram of the present invention;

[0024] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 3 This is a schematic diagram of the first and second support bars in this utility model;

[0026] Figure 4 This is a schematic diagram of the fastener structure in this utility model.

[0027] In the diagram: 1. Connecting bar; 2. Baffle; 3. Threaded rod; 4. Nut; 5. Washer ring; 6. Expansion sleeve; 7. Expansion part; 8. Fixing tooth; 9. Force-bearing bar; 10. First movable groove; 11. First support bar; 12. First movable pin; 13. First connecting groove; 14. Second movable groove; 15. Second support bar; 16. Second movable pin; 17. Second limiting bar; 18. Second connecting groove; 19. Fixing plate; 20. First support leg; 21. Second support leg; 22. Fixing bar; 23. First fixing bolt; 24. Second fixing bolt; 25. First limiting bar. 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods. Example 1

[0030] Please see Figure 1-4This utility model provides a technical solution: To achieve the above objectives, this utility model provides the following technical solution: A stainless steel expansion screw with anti-loosening teeth, comprising: a baffle 2 and a connecting sleeve fixed to the bottom of the baffle 2; an expansion sleeve 6 is fixed to the bottom of the connecting sleeve; a threaded rod 3 is provided inside the connecting sleeve and the expansion sleeve 6, and an expansion part 7 is fixed to the bottom of the threaded rod 3; a nut 4 is threadedly connected to the outside of the threaded rod 3; a first movable groove 10 and a second movable groove 14 are provided on the top of the baffle 2, and a first support bar 11 and a second support bar 15 are respectively movably connected in the first movable groove 10 and the second movable groove 14 by a first movable pin 12 and a second movable pin 16; a first limiting bar 25 and a second limiting bar 17 that abut against the top of the nut 4 are respectively fixed on the inner side of the first support bar 11 and the second support bar 15; a pad located between the nut 4 and the baffle 2 is movably provided outside the threaded rod 3. Ring 5, first support bar 11, and second support bar 15 are fixed by a fixing component, which includes a first connecting groove 13 and a second connecting groove 18 respectively opened on the first support bar 11 and the second support bar 15; a fixing member is provided in the first connecting groove 13 and the second connecting groove 18, the fixing member is composed of a fixing plate 19, a first support leg 20, and a second support leg 21, the first support leg 20 and the second support leg 21 are fixed to one end of the fixing plate 19, the first support leg 20 and the second support leg 21 are respectively set inside the first connecting groove 13 and the second connecting groove 18, one end of the fixing plate 19 abuts against the threaded rod 3, and a fixing strip 22 abuts against the threaded rod 3 is provided between the first support leg 20 and the second support leg 21, the first support leg 20 is fixed to one end of the fixing strip 22 by a first fixing bolt 23, and the second support leg 21 is fixed to the other end of the fixing strip 22 by a second fixing bolt 24.

[0031] Specifically, since the first support bar 11 is movably connected to the first movable groove 10 via the first movable pin 12, the angle of the first support bar 11 can be directly adjusted. Similarly, since the second support bar 15 is movably connected to the second movable groove 14 via the second movable pin 16, the angle of the second support bar 15 can be directly adjusted. After the first support bar 11 and the second support bar 15 are closed, the first support leg 20 and the second support leg 21 are respectively placed into the first connecting groove 13 and the second connecting groove 18, and the fixing bar 22 is placed between the first support leg 20 and the second support leg 21, and the first fixing bolt 23 is used to fix them. The second fixing bolt 24 fixes the fixing strip 22 between the first support leg 20 and the second support leg 21. At this time, the first support strip 11 and the second support strip 15 can be fixed. At the same time, the first limiting strip 25 and the second limiting strip 17 will abut against the top of the nut 4. With the cooperation of the first support strip 11, the second support strip 15, the first limiting strip 25, and the second limiting strip 17, the nut 4 can be limited. Compared with the existing ones, this utility model can limit the nut 4, thereby preventing the nut 4 from being dislodged or loosened, thus ensuring the connection stability of the expansion screw and avoiding the occurrence of safety hazards. Example 2

[0032] Please see Figure 1 , 2 This utility model provides a technical solution: a stainless steel expansion screw with anti-loosening teeth, wherein the outer wall of the expansion sleeve 6 is fixed with fixing teeth 8, and the top of the baffle 2 is fixed with a force-bearing strip 9.

[0033] Specifically, since there are fixing teeth 8 fixed on the outer wall of the expansion sleeve 6, when the connecting sleeve is placed into the connecting hole, the fixing teeth 8 will rub against the inner wall of the connecting hole and produce corresponding scratches. At this time, the baffle 2 and the connecting sleeve are rotated with the force strip 9 using external tools. The fixing teeth 8 will rotate in the connecting hole. During the rotation, corresponding scratches will also be produced. However, the scratches at this time can firmly lock the fixing teeth 8, thereby improving the overall connection stability of the expansion screw. Furthermore, when the expansion sleeve 6 expands, the fixing teeth 8 will be embedded into the connecting hole, further improving the overall connection stability of the expansion screw.

[0034] Working principle:

[0035] Insert the connecting sleeve into the connecting hole, and use an external tool in conjunction with the force bar 9 to rotate the baffle 2 and the connecting sleeve. At this time, the fixing tooth 8 will rotate in the connecting hole, and corresponding scratches will be generated during the rotation. However, the scratches at this time can firmly lock the fixing tooth 8, thereby improving the overall connection stability of the expansion screw. Then, use an external tool to rotate the nut 4. At this time, the threaded rod 3 drives the expansion part 7 to move inside the connecting sleeve and the expansion sleeve 6. When the expansion part 7 abuts against the expansion sleeve 6, it will open the expansion sleeve 6. When the expansion sleeve 6 expands, the fixing tooth 8 will be embedded into the connecting hole, further improving the overall connection stability of the expansion screw.

[0036] Since the first support bar 11 is movably connected to the first movable groove 10 via the first movable pin 12, the angle of the first support bar 11 can be directly adjusted. Similarly, since the second support bar 15 is movably connected to the second movable groove 14 via the second movable pin 16, the angle of the second support bar 15 can be directly adjusted. After the first support bar 11 and the second support bar 15 are closed, the first support leg 20 and the second support leg 21 are respectively placed into the first connecting groove 13 and the second connecting groove 18, and the fixing bar 22 is placed between the first support leg 20 and the second support leg 21, and the first fixing bolt 23 is used to fix them. The second fixing bolt 24 fixes the fixing strip 22 between the first support leg 20 and the second support leg 21. At this time, the first support strip 11 and the second support strip 15 can be fixed. At the same time, the first limiting strip 25 and the second limiting strip 17 will abut against the top of the nut 4. With the cooperation of the first support strip 11, the second support strip 15, the first limiting strip 25, and the second limiting strip 17, the nut 4 can be limited. This utility model can limit the nut 4, thereby preventing the nut 4 from being dislodged or loosened, thus ensuring the connection stability of the expansion screw and avoiding the occurrence of safety hazards.

[0037] In the description of this utility model, it should be understood that the terms "center", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A non-removable toothed stainless steel expansion screw, characterized in that, include: Baffle (2) and connecting sleeve fixed to the bottom of baffle (2); An expansion sleeve (6) is fixed to the bottom of the connecting sleeve; The connecting sleeve and the expansion sleeve (6) are provided with a threaded rod (3), and the bottom of the threaded rod (3) is fixed with an expansion part (7); The threaded rod (3) is externally threaded with a nut (4); The baffle (2) has a first movable groove (10) and a second movable groove (14) on its top. The first movable groove (10) and the second movable groove (14) are respectively connected to the first support bar (11) and the second support bar (15) by the first movable pin (12) and the second movable pin (16). The first support bar (11) and the second support bar (15) are respectively fixed with a first limiting bar (25) and a second limiting bar (17) that abut against the top of the nut (4).

2. A non-stainless steel expansion screw according to claim 1, wherein The threaded rod (3) is externally provided with a washer (5) located between the nut (4) and the baffle (2).

3. The anti-backout stainless steel expansion anchor of claim 1, wherein, The first support bar (11) and the second support bar (15) are fixed by a fixing component, which includes a first connecting groove (13) and a second connecting groove (18) respectively opened on the first support bar (11) and the second support bar (15); Fixing components are provided in the first connecting groove (13) and the second connecting groove (18).

4. A non-stainless steel expansion screw according to claim 3, wherein The fixing component consists of a fixing plate (19), a first leg (20), and a second leg (21). The first leg (20) and the second leg (21) are fixed to one end of the fixing plate (19). The first leg (20) and the second leg (21) are respectively disposed inside the first connecting groove (13) and the second connecting groove (18). One end of the fixing plate (19) abuts against the threaded rod (3).

5. A non-stainless steel expansion screw according to claim 4, wherein A fixing strip (22) that abuts against the threaded rod (3) is provided between the first leg (20) and the second leg (21). The first leg (20) is fixed to one end of the fixing strip (22) by the first fixing bolt (23), and the second leg (21) is fixed to the other end of the fixing strip (22) by the second fixing bolt (24).

6. A non-stainless steel expansion screw according to claim 1, wherein The expansion sleeve (6) has fixing teeth (8) fixed on its outer wall.

7. A stainless steel expansion screw with anti-tooth dislodging as described in claim 1, characterized in that, A force-bearing strip (9) is fixed to the top of the baffle (2).

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