Occlusion type anti-skid expansion sleeve

Abstract

The utility model relates to the technical field of expansion sleeves, in particular to an occlusion type anti-skid expansion sleeve which comprises an expansion sleeve body. A notch is formed in one end of the expansion sleeve; the expansion sleeve is composed of two half expansion sleeves, an occlusion groove is formed in the outer wall of one half expansion sleeve, and an occlusion part occluded in the occlusion groove is fixed to the outer wall of the other half expansion sleeve. According to the expansion sleeve, when the expansion sleeve is inserted into the installation hole, the fixing strip is contained in the installation hole, friction between the fixing strip and the inner wall of the installation hole is avoided, the structural strength of the fixing strip is guaranteed, and the expansion sleeve is not prone to deformation. And after the expansion sleeve is completely inserted into the mounting hole, the fixing strip is driven to abut against the inner wall of the mounting hole, and then the expansion sleeve can be fixed, so that the stability and the anti-skid performance of the expansion sleeve are improved.

Description

Technical Field

[0001] This utility model relates to the field of expansion sleeve technology, specifically to an interlocking anti-slip expansion sleeve. Background Technology

[0002] Expansion bolts are special threaded fasteners used to fix bolts to walls, floors, and columns. They generally consist of a bolt, an expansion sleeve, and a nut. The bolt passes through the expansion sleeve and is then fitted into the nut. The bolt has a tapered end; when the nut is tightened, the tapered end expands the expansion sleeve outward, thus securing the bolt.

[0003] The Chinese Patent Network discloses an interlocking expansion sleeve, publication number CN222836031U. Although the first and second interlocking teeth can form a tenon-and-mortise structure at the joint of the sleeve body, increasing the structural strength of the joint and reducing the risk of cracking; and the barbs can directly contact the inner wall of the mounting hole after the sleeve body is inserted, increasing the friction between the sleeve body and the mounting hole and preventing the sleeve body from spinning freely when the screw is turned; and the barbs press against the wall of the mounting hole when the sleeve body is pulled out, preventing the sleeve body from detaching from the mounting hole and improving the fixing effect of the sleeve body; and the stamped groove can improve the structural strength of the expansion part and the structural strength of the sleeve body, the barbs on the outer wall of the sleeve body will rub against the inner wall of the mounting hole when the sleeve body is inserted into the mounting hole, thus affecting the structural strength of the barbs and consequently affecting the stability and anti-slip performance of the expansion sleeve.

[0004] To address this, a snap-fit ​​anti-slip expansion sleeve is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide an interlocking anti-slip expansion sleeve.

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

[0007] An interlocking anti-slip expansion sleeve includes:

[0008] Expansion sleeve;

[0009] The expansion sleeve has a notch at one end;

[0010] The expansion sleeve is composed of two semi-expansion sleeves, one of which has an engagement groove on its outer wall, and the other has an engagement part fixed on its outer wall that engages inside the engagement groove.

[0011] Both of the semi-expansion sleeves have movable grooves on their outer walls, and fixed strips are movably connected to the movable grooves by movable pins.

[0012] Preferably, each of the two semi-expansion sleeves has a countersunk hole at one end, and the inner wall of the countersunk hole has a threaded hole that communicates with the movable groove. A threaded rod is threadedly connected to the threaded hole, and a cross rotating plate located inside the countersunk hole is fixed at one end of the threaded rod. A movable block that is rotatably disposed inside the movable groove is rotatably connected to the other end of the threaded rod.

[0013] Preferably, the inner wall of the movable groove is provided with a T-shaped groove, and a T-shaped block is movably disposed in the T-shaped groove.

[0014] Preferably, the T-shaped block is fixed to the outer wall of the movable block.

[0015] Preferably, each of the two semi-expansion sleeves has a limiting groove on its outer wall, a limiting strip is provided in the limiting groove, a slot is provided on the inner wall of each of the two limiting grooves, and two locking blocks are fixed on the outer wall of the limiting strip, with the two locking blocks respectively locking into the two slots.

[0016] Preferably, the thickness of the limiting strip is not greater than the depth of the limiting groove.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] Because the fixing strip is movably connected to the movable groove using a movable pin, the angle of the fixing strip is adjustable. During the insertion of the expansion sleeve into the mounting hole, the fixing strip is located inside the movable groove, preventing friction with the inner wall of the mounting hole and thus ensuring its structural strength. After the expansion sleeve is fully inserted into the mounting hole, a Phillips screwdriver with a Phillips rotating plate is used to move the threaded rod within the threaded hole. The moving rod pushes the moving block, which in turn squeezes the fixing strip, causing a certain angular displacement. Once the fixing strip abuts against the inner wall of the mounting hole, the expansion sleeve is secured. Compared to existing designs, this invention, by retracting the fixing strip into the mounting hole during insertion, avoids friction between the fixing strip and the inner wall, ensuring its structural strength. Furthermore, by driving the fixing strip to abut against the inner wall of the mounting hole after the expansion sleeve is fully inserted, the expansion sleeve is secured, thereby improving its stability and anti-slip performance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a partial structural schematic diagram of the present invention;

[0021] Figure 3 This is a partial cross-sectional structural diagram of the present invention;

[0022] Figure 4 This is a schematic diagram of the T-shaped block structure in this utility model;

[0023] Figure 5 This is a schematic diagram of the limiting strip structure in this utility model.

[0024] In the diagram: 1. Semi-expansion sleeve; 2. Notch; 3. Engaging part; 4. Engaging groove; 5. Limiting groove; 6. Slot; 7. Limiting strip; 8. Slot; 9. Movable groove; 10. Movable pin; 11. Fixing strip; 12. Countersunk hole; 13. Threaded hole; 14. Threaded rod; 15. Cross rotating plate; 16. Moving block; 17. T-slot; 18. T-block. Detailed Implementation

[0025] 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.

[0026] 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

[0027] Please see Figure 1-4 This utility model provides a technical solution: To achieve the above objectives, this utility model provides the following technical solution: A bite-type anti-slip expansion sleeve, comprising: an expansion sleeve; a notch 2 is provided at one end of the expansion sleeve; the expansion sleeve is composed of two semi-expansion sleeves 1, one of the semi-expansion sleeves 1 has a bite groove 4 on its outer wall, and the other semi-expansion sleeve 1 has a bite part 3 fixed on its outer wall that bites into the bite groove 4; both semi-expansion sleeves 1 have movable grooves 9 on their outer walls, and movable pins 10 are used to connect them movably. There is a fixed strip 11, and each of the two semi-expansion sleeves 1 has a countersunk hole 12 at one end. The inner wall of the countersunk hole 12 has a threaded hole 13 that communicates with the movable groove 9. A threaded rod 14 is threadedly connected to the threaded hole 13. One end of the threaded rod 14 is fixed with a cross rotating plate 15 located inside the countersunk hole 12. The other end of the threaded rod 14 is rotatably connected to a movable block 16 that is movably disposed inside the movable groove 9. A T-shaped groove 17 is opened on the inner wall of the movable groove 9. A T-shaped block 18 is movably disposed in the T-shaped groove 17. The T-shaped block 18 is fixed to the outer wall of the movable block 16.

[0028] Specifically, since the fixing strip 11 is movably connected to the movable groove 9 using the movable pin 10, the angle of the fixing strip 11 is adjustable. When the expansion sleeve is inserted into the mounting hole, the fixing strip 11 is located inside the movable groove 9, so it will not rub against the inner wall of the mounting hole, thus ensuring the structural strength of the fixing strip 11. After the expansion sleeve is fully inserted into the mounting hole, a Phillips screwdriver is used in conjunction with a Phillips rotating plate 15 to drive the threaded rod 14 to move within the threaded hole 13. When the threaded rod 14 moves, it pushes the moving block 16 to move. When the moving block 16 moves... The fixing strip 11 will be squeezed, and at this time the fixing strip 11 will be offset at a certain angle. When the fixing strip 11 abuts against the inner wall of the mounting hole, the expansion sleeve can be fixed. Compared with the existing ones, when the expansion sleeve is inserted into the mounting hole, the fixing strip 11 is housed inside the mounting hole, which avoids friction between the fixing strip 11 and the inner wall of the mounting hole and ensures the structural strength of the fixing strip 11. When the expansion sleeve is fully inserted into the mounting hole, the fixing strip 11 is driven to abut against the inner wall of the mounting hole to fix the expansion sleeve, thereby improving the stability and anti-slip performance of the expansion sleeve.

[0029] Since the inner wall of the movable groove 9 is provided with a T-shaped groove 17, and the outer wall of the movable block 16 is fixed with a T-shaped block 18 that is movably disposed inside the T-shaped groove 17, the movement path of the movable block 16 can be limited by the cooperation of the T-shaped groove 17 and the T-shaped block 18, so as to prevent the movable block 16 from deviating during the movement, and ensure that the movable block 16 can smoothly squeeze the fixing strip 11, thus ensuring the fixing effect of the fixing strip 11 on the expansion sleeve. Example 2

[0030] Please see Figure 1 , 2 5. This utility model provides a technical solution: an interlocking anti-slip expansion sleeve, wherein the outer walls of the two semi-expansion sleeves 1 are provided with limiting grooves 5, and limiting strips 7 are provided in the limiting grooves 5. The inner walls of the two limiting grooves 5 are provided with slots 6, and two locking blocks 8 are fixed on the outer wall of the limiting strips 7. The two locking blocks 8 are respectively locked into the two slots 6. The thickness of the limiting strips 7 is not greater than the depth of the limiting grooves 5.

[0031] Specifically, with the cooperation of the slot 6 and the block 8, the limiting strip 7 is snapped into the limiting groove 5. The limiting strip 7 can fix the two semi-expansion sleeves 1, thereby improving the stability and structural strength of the two semi-expansion sleeves 1. Since the thickness of the limiting strip 7 is not greater than the depth of the limiting groove 5, the limiting strip 7 is completely located inside the limiting groove 5. When the expansion sleeve is inserted into the mounting hole, the limiting strip 7 will not cause any obstruction.

[0032] Working principle:

[0033] First, engage the interlocking part 3 into the interlocking groove 4 to initially connect and fix the two semi-expansion sleeves 1. Then, with the cooperation of the slot 6 and the locking block 8, the limiting strip 7 is engaged into the limiting groove 5. The limiting strip 7 can fix the two semi-expansion sleeves 1, thereby improving the stability and structural strength of the two semi-expansion sleeves 1. Then, insert the two semi-expansion sleeves 1 (expansion sleeves) into the mounting hole. It should be noted that since the fixing strip 11 is movably connected to the movable groove 9 by the movable pin 10, the angle of the fixing strip 11 is adjustable. When the expansion sleeve is inserted into the mounting hole, the fixing strip 11 is located inside the movable groove 9, so the fixing strip 11 will not rub against the inner wall of the mounting hole, thus ensuring the structural strength of the fixing strip 11. After the expansion sleeve is fully inserted into the mounting hole, use a Phillips screwdriver and a Phillips rotating plate 15 to drive the threaded rod 14 to move in the threaded hole 13. When the threaded rod 14 moves, it will push the moving block 16 to move. When the device moves, it will compress the fixing strip 11, causing the fixing strip 11 to shift at a certain angle. Once the fixing strip 11 abuts against the inner wall of the mounting hole, the expansion sleeve can be fixed. Since the inner wall of the movable groove 9 has a T-slot 17, and the outer wall of the movable block 16 has a T-block 18 that is movably disposed inside the T-slot 17, the movement path of the movable block 16 can be limited by the cooperation of the T-slot 17 and the T-block 18, preventing the movable block 16 from shifting during movement and ensuring the stability of the movable block 16. The fixing strip 11 can be squeezed smoothly, ensuring the fixing effect of the fixing strip 11 on the expansion sleeve. Since the thickness of the limiting strip 7 is not greater than the depth of the limiting groove 5, the limiting strip 7 is completely located inside the limiting groove 5. When the expansion sleeve is inserted into the mounting hole, the limiting strip 7 will not cause obstruction. Then, the screw is threaded to the inside of the two semi-expansion sleeves 1 (expansion sleeves). Since a notch 2 is opened at one end of the expansion sleeve, the notch 2 of the expansion sleeve will expand outward under the compression of the screw.

[0034] 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.

[0035] 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 bite-type anti-skid expansion sleeve, characterized in that, include: Expansion sleeve; The expansion sleeve has a notch (2) at one end; The expansion sleeve is composed of two semi-expansion sleeves (1), one of which has an engagement groove (4) on its outer wall, and the other has an engagement part (3) fixed on its outer wall that engages with the engagement groove (4). Both of the semi-expansion sleeves (1) have movable grooves (9) on their outer walls, and fixed strips (11) are movably connected in the movable grooves (9) by movable pins (10).

2. A bite-type non-slip expansion sleeve according to claim 1, characterized in that, Both of the semi-expansion sleeves (1) have a countersunk hole (12) at one end. The inner wall of the countersunk hole (12) has a threaded hole (13) that communicates with the movable groove (9). A threaded rod (14) is threadedly connected to the threaded hole (13). One end of the threaded rod (14) is fixed with a cross rotating plate (15) located inside the countersunk hole (12). The other end of the threaded rod (14) is rotatably connected to a movable block (16) that is movably disposed inside the movable groove (9).

3. A bite-type non-slip expansion sleeve according to claim 2, characterized in that, The inner wall of the movable groove (9) is provided with a T-shaped groove (17), and a T-shaped block (18) is movably arranged in the T-shaped groove (17).

4. A bite-type non-slip expansion sleeve according to claim 3, characterized in that, The T-shaped block (18) is fixed to the outer wall of the movable block (16).

5. A bite-type non-slip expansion sleeve according to claim 1, characterized in that, Both of the semi-expansion sleeves (1) have a limiting groove (5) on their outer walls. A limiting strip (7) is provided in the limiting groove (5). A slot (6) is provided on the inner wall of both limiting grooves (5). Two locking blocks (8) are fixed on the outer wall of the limiting strip (7). The two locking blocks (8) are respectively locked into the two slots (6).

6. A bite-type non-slip expansion sleeve according to claim 5, characterized in that, The thickness of the limiting strip (7) is not greater than the depth of the limiting groove (5).

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