Reusable expansion bolt
By designing reusable expansion bolts and using the expansion and contraction mechanism of the rubber sleeve, the problem of the inability to pull out expansion bolts during construction is solved, the reuse of resources and the protection of structure are achieved, and the use effect of bolts is improved.
Patent Information
- Application Number
- CN202411724620.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-01-10
AI Technical Summary
During construction, the used expansion bolts cannot be pulled out, resulting in waste of resources and structural damage.
A reusable expansion bolt including screws, nuts, rubber sleeve expansion assembly and base is designed. Fixed and disassembled through expansion and contraction of rubber sleeves, and air pump inflation makes the rubber sleeve tightly combined with the screws and structural hole walls. Ensure the removability of the bolts.
The reuse of expansion bolts is achieved, reducing resource waste and structural damage, and improving the connection firmness of the bolts.
Smart Images
Figure CN119288961A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of bolts, and in particular to a reusable expansion bolt. Background Art
[0002] In engineering construction, there are many temporary components or temporary equipment that need to be fixed with expansion bolts. After use, the expansion bolts cannot be pulled out and can only be left in the relevant structure as waste. The inability to reuse them causes a large amount of resource waste. In addition, the expansion bolts left in the relevant structure will also cause certain damage to the relevant structure. Summary of the invention
[0003] The object of the present invention is to provide a reusable expansion bolt, which can effectively reduce the waste of resources.
[0004] The technical solution adopted by the present invention to solve the technical problem is: a reusable expansion bolt includes a screw rod and a nut matched with the screw rod, and also includes a rubber sleeve expansion assembly and a base, the inner end of the screw rod is fixedly arranged in the middle of the base, and at least one connecting groove is arranged on the outer surface of the screw rod, and the connecting groove is arranged along the length direction of the screw rod;
[0005] The rubber sleeve expansion assembly includes a rubber sleeve, a connecting tube and an inflation nozzle. A mounting hole arranged along the length direction of the rubber sleeve is provided in the middle of the rubber sleeve. At least one connecting protrusion is provided on the inner wall of the mounting hole. The connecting protrusion is arranged along the length direction of the mounting hole. The screw rod is matched to pass through the mounting hole, and a connecting protrusion is matched to be arranged in a connecting groove. The inner end of the rubber sleeve is abutted against the base, and an inflation port is provided on the outer side of the rubber sleeve. One end of the connecting tube is connected to the inflation port, and the other end of the connecting tube is connected to the inflation nozzle.
[0006] Furthermore, the central axis of the base is in the same straight line as the central axis of the screw, the base is cylindrical in shape, and the circular diameter of the cross section of the base is greater than the circular diameter of the cross section of the screw.
[0007] Furthermore, three connecting grooves are arranged on the outer surface of the screw, and the three connecting grooves are evenly distributed on the screw.
[0008] Furthermore, the rubber sleeve comprises a fixing plate and a sleeve body, and both ends of the sleeve body are respectively connected with the fixing plates.
[0009] Furthermore, the fixing plate is cylindrical in shape, and the circular diameter of the cross section of the fixing plate is greater than the circular diameter of the cross section of the base.
[0010] Furthermore, the inflation port is arranged on the fixing plate.
[0011] Furthermore, a flat washer is arranged between the nut and the rubber sleeve.
[0012] Furthermore, a clearance notch is arranged on the flat washer.
[0013] Furthermore, an elastic gasket is arranged between the nut and the rubber sleeve.
[0014] The beneficial effects of the present invention are as follows: when the expansion bolt is used, firstly, a mounting hole is drilled on the structure, and then the expansion bolt (base, screw rod, rubber sleeve) is inserted into the mounting hole, and finally, an air pump is used to inflate the rubber sleeve through the inflation nozzle to expand the rubber sleeve, and the rubber sleeve expands inwards to make it tightly combined with the screw rod, and the rubber sleeve expands outwards to make it tightly combined with the hole wall of the structure, thereby generating pressure and friction to fix the entire bolt on the structure, so that the expansion bolt can be used. When the expansion bolt needs to be disassembled after use, the gas in the rubber sleeve is released through the inflation nozzle, and the rubber sleeve will shrink after releasing the gas, so that the rubber sleeve is separated from the hole wall of the structure, so that the expansion bolt can be pulled out. It can be seen that the expansion bolt of the present invention has a simple structure and can be disassembled for repeated use, which effectively reduces resource waste and also reduces damage to the structure. In addition, a connecting protrusion and a connecting groove are provided between the rubber sleeve and the screw rod, which improves the connection firmness between the two and improves the use effect of the expansion bolt. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a schematic diagram of the present invention;
[0016] Figure 2 yes Figure 1 A cross-sectional view taken along line 1-1;
[0017] Figure 3 is a schematic diagram of a screw;
[0018] Figure 4 yes Figure 3 A cross-sectional view taken along line 2-2;
[0019] Figure 5 is a schematic diagram of a rubber sleeve expansion assembly;
[0020] Figure 6 yes Figure 5 Sectional view along 3-3 direction;
[0021] Figure 7 is a schematic diagram of a flat washer;
[0022] Marked as: screw 1, connecting groove 11, nut 2, rubber sleeve 3, mounting hole 31, connecting protrusion 32, inflation port 33, fixing plate 34, sleeve body 35, connecting tube 4, inflation nozzle 5, flat washer 6, clearance notch 61, elastic washer 7, base 8. DETAILED DESCRIPTION
[0023] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.
[0024] like Figures 1 to 7 As shown, the reusable expansion bolt of the present invention comprises a screw rod 1 and a nut 2 matched with the screw rod 1, and also comprises a rubber sleeve expansion assembly and a base 8. The inner end of the screw rod 1 is fixedly arranged in the middle of the base 8, and the inner end of the screw rod 1 refers to the end inserted into the installation hole. At least one connecting groove 11 is arranged on the outer surface of the screw rod 1, and the connecting groove 11 is arranged along the length direction of the screw rod 1.
[0025] The rubber sleeve expansion assembly includes a rubber sleeve 3, a connecting tube 4 and an inflation nozzle 5. A mounting hole 31 is arranged along its length direction in the middle of the rubber sleeve 3. At least one connecting protrusion 32 is arranged on the inner wall of the mounting hole 31. The connecting protrusion 32 is arranged along the length direction of the mounting hole 31. The screw 1 is matched and passed through the mounting hole 31, and a connecting protrusion 32 is matched and arranged in a connecting groove 11. The inner end of the rubber sleeve 3 is abutted against the base 8. An inflation port 33 is arranged on the outer side of the rubber sleeve 3. One end of the connecting tube 4 is connected to the inflation port 33, and the other end of the connecting tube 4 is connected to the inflation nozzle 5.
[0026] When the expansion bolt is used, firstly, a mounting hole is drilled on the structure, and then the expansion bolt (base 8, screw rod 1, rubber sleeve 3) is inserted into the mounting hole, and finally, an air pump is used to inflate the rubber sleeve 3 through the inflation nozzle 5 to expand the rubber sleeve 3, so that the rubber sleeve 3 expands inwards to make it tightly combined with the screw rod 1, and the rubber sleeve 3 expands outwards to make it tightly combined with the hole wall of the structure, thereby generating pressure and friction to fix the entire bolt on the structure, so that the expansion bolt can be used. When the expansion bolt needs to be disassembled after use, the gas in the rubber sleeve 3 is released through the inflation nozzle 5, and the rubber sleeve 3 will shrink after the gas is released, so that the rubber sleeve 3 is separated from the hole wall of the structure, so that the expansion bolt can be pulled out.
[0027] Specifically, the inner diameter of the mounting hole 31 in the rubber sleeve 3 is the same as the diameter of the screw 1. For ease of use, the base 8 will not enter the mounting hole 31 to ensure the normal use of the expansion bolt. Figure 1 , Figure 3 As shown, the central axis of the base 8 is in the same straight line as the central axis of the screw 1, that is, the screw 1 is arranged in the middle of the base 8, the shape of the base 8 is cylindrical, and the cross-sectional circular diameter of the base 8 is larger than the cross-sectional circular diameter of the screw 1.
[0028] In order to facilitate processing and ensure the use effect, three connecting grooves 11 are arranged on the outer surface of the screw 1, and the three connecting grooves 11 are evenly distributed on the screw 1. Correspondingly, three connecting protrusions 32 are arranged on the inner wall of the mounting hole 31, and the three connecting protrusions 32 are evenly distributed on the inner wall.
[0029] In order to improve the use effect of the rubber sleeve 3, Figure 3 As shown, the rubber sleeve 3 includes a fixing plate 34 and a sleeve body 35, and the fixing plates 34 are respectively connected to both ends of the sleeve body 35. The fixing plate 34 is made of metal, and more preferably, the fixing plate 34 is cylindrical, and the circular diameter of the cross section of the fixing plate 34 is greater than the circular diameter of the cross section of the base 8. And the inflation port 33 is provided on the fixing plate 34.
[0030] In order to improve the tightness of the expansion bolt, a flat washer 6 and an elastic washer 7 are arranged between the nut 2 and the rubber sleeve 3, and a clearance notch 61 is arranged on the flat washer 6. The clearance notch 61 facilitates the arrangement of the connecting pipe 4 and can also limit the connecting pipe 4, thereby protecting the connecting pipe 4 during use.
[0031] In summary, the expansion bolt of the present invention has a simple structure and can be disassembled for repeated use, thereby effectively reducing waste of resources and reducing damage to the structure.
Claims
1. A reusable expansion bolt, comprising a screw rod (1) and a nut (2) adapted to the screw rod (1), characterized in that: It also comprises a rubber sleeve expansion assembly and a base (8), the inner end of the screw rod (1) is fixedly arranged in the middle of the base (8), and at least one connecting groove (11) is arranged on the outer surface of the screw rod (1), and the connecting groove (11) is arranged along the length direction of the screw rod (1); The rubber sleeve expansion assembly comprises a rubber sleeve (3), a connecting pipe (4) and an inflation nozzle (5); a mounting hole (31) arranged along the length direction of the rubber sleeve (3) is arranged in the middle; at least one connecting protrusion (32) is arranged on the inner wall of the mounting hole (31); the connecting protrusion (32) is arranged along the length direction of the mounting hole (31); a screw rod (1) is matched and passed through the mounting hole (31); and a connecting protrusion (32) is matched and arranged in a connecting groove (11); the inner end of the rubber sleeve (3) is abutted against a base (8); an inflation port (33) is arranged on the outer side of the rubber sleeve (3); one end of the connecting pipe (4) is connected to the inflation port (33); and the other end of the connecting pipe (4) is connected to the inflation nozzle (5).
2. The reusable expansion bolt according to claim 1, characterized in that: The central axis of the base (8) is on the same straight line as the central axis of the screw (1); the base (8) is cylindrical in shape; and the circular diameter of the cross section of the base (8) is greater than the circular diameter of the cross section of the screw (1).
3. The reusable expansion bolt according to claim 1, characterized in that: Three connecting grooves (11) are arranged on the outer surface of the screw rod (1), and the three connecting grooves (11) are evenly distributed on the screw rod (1).
4. The reusable expansion bolt according to claim 1, characterized in that: The rubber sleeve (3) comprises a fixing plate (34) and a sleeve body (35), and both ends of the sleeve body (35) are respectively connected to the fixing plates (34).
5. The reusable expansion bolt according to claim 4, characterized in that: The fixing plate (34) is cylindrical in shape, and the circular diameter of the cross section of the fixing plate (34) is greater than the circular diameter of the cross section of the base (8).
6. The reusable expansion bolt according to claim 4, characterized in that: The inflation port (33) is arranged on the fixing plate (34).
7. The reusable expansion bolt according to claim 1, characterized in that: A flat washer (6) is arranged between the nut (2) and the rubber sleeve (3).
8. The reusable expansion bolt according to claim 7, characterized in that: The flat washer (6) is provided with a clearance notch (61).
9. The reusable expansion bolt according to any one of claims 1 to 8, characterized in that: An elastic washer (7) is also arranged between the nut (2) and the rubber sleeve (3).