Detachable expansion bolt

Abstract

The utility model discloses a detachable expansion bolt, and relates to the technical field of expansion bolts, the detachable expansion bolt comprises a screw rod, the screw rod comprises an expansion head, one end of the expansion head is provided with a polished rod, the other end of the polished rod is provided with a threaded rod, the outer wall of the screw rod is provided with an inner sleeve, the inner sleeve comprises a sleeve body, and the sleeve body is provided with an outer sleeve. A plurality of sets of openings are formed in the end, facing the expansion head, of the sleeve body, an outer sleeve is arranged on the outer wall of the inner sleeve, a connecting piece is arranged on the outer wall of the outer sleeve, a gasket is arranged on the side, away from the screw, of the connecting piece, and a nut is arranged on the other side of the gasket. According to the detachable expansion bolt, in the process of rotating the nut, pressure is generated on the gasket, the connecting piece, the outer sleeve and the inner sleeve, the inner sleeve is forced to move in the direction of the expansion head, the expansion head can abut against the opening, the opening is opened and expanded, and therefore the device generates pulling resistance, and installation of the expansion bolt is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion bolts, in particular to a detachable expansion bolt. Background Art

[0002] Expansion bolts are special threaded connectors used to fix pipe supports or equipment to walls, floors, and columns. Expansion bolts are composed of countersunk bolts, expansion tubes, flat washers, spring washers, and hexagonal nuts. Commonly used expansion bolts include plastic, rubber, and metal bolts. They are tightened by screws or bolts to expand the expansion tubes and fasten them in building components with expansion force. Expansion bolts include screws and expansion sleeves. The screw ends are threaded and the expansion sleeves are provided with several cuts. They are stuffed together into the holes drilled in the wall. The screws are pulled outward to pull the taper into the expansion sleeves. The expansion sleeves are expanded and then tightly fixed to the wall.

[0003] Most of the existing expansion bolts are disposable products when installed and used. They cannot be removed when not needed, cannot be reused, and cause damage to the wall. The subsequent construction and installation are not convenient, which brings certain adverse effects to people's use process. In order to solve the shortcomings of the existing technology, we propose a detachable expansion bolt. Utility Model Content

[0004] The main purpose of the utility model is to provide a detachable expansion bolt, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A detachable expansion bolt comprises a screw rod, the screw rod comprises an expansion head, a smooth rod is provided at one end of the expansion head, a threaded rod is provided at the other end of the smooth rod, an inner sleeve is provided on the outer wall of the screw rod, the inner sleeve comprises a sleeve body, a plurality of groups of openings are provided on the end of the sleeve body facing the expansion head, an external thread is provided on the outer wall of the other end of the sleeve body, an outer sleeve is provided on the outer wall of the inner sleeve, a connecting piece is provided on the outer wall of the outer sleeve, a gasket is provided on the side of the connecting piece away from the screw rod, the gasket is located on the outer wall of the screw rod, a nut is provided on the other side of the gasket, and the nut is located on the outer wall of the screw rod.

[0007] Preferably, a connecting groove is provided inside the threaded rod, a locking groove is provided inside the screw rod, the connecting groove and the locking groove are communicated with each other, a disassembly mechanism is provided at the end of the screw rod, the disassembly mechanism includes a turntable, a connecting rod is provided on the side of the turntable facing the screw rod, a locking block is provided at the other end of the connecting rod, the connecting rod is located inside the connecting groove, and the locking block is located inside the locking groove.

[0008] Preferably, the inner sleeve is located on the outer wall of the polished rod, and the inner sleeve is detachably connected to the screw rod.

[0009] Preferably, the nut is rotatably connected to the threaded rod, and the nut is detachably connected to the threaded rod.

[0010] Preferably, the outer sleeve is rotatably connected to the inner sleeve via an external thread, and the outer sleeve is detachably connected to the inner sleeve.

[0011] Preferably, the disassembly mechanism is located in the engaging groove of the screw rod and inside the turntable, and the disassembly mechanism is detachably connected to the screw rod.

[0012] Beneficial Effects

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. In the utility model, the connecting piece is connected to the screw rod by a provided nut. After drilling a hole at the installation location, the screw rod is inserted into the installation hole so that the expansion head is located in the installation hole. The inner sleeve is then sleeved on the outer wall of the screw rod, and the outer sleeve is rotated and tightened with the inner sleeve through the external thread. Among them, the connecting part between the inner sleeve and the outer sleeve is located outside the installation hole. The connecting piece is sleeved outside the outer sleeve so that the connecting piece is pressed against the outside of the installation hole. The gasket is pressed against the connecting piece, and the nut is screwed on. In the process of rotating the nut, pressure is generated on the gasket, the connecting piece, the outer sleeve, and the inner sleeve, forcing the inner sleeve to move in the direction of the expansion head. The opening will be pushed open by the expansion head, causing the opening to open and expand, thereby causing the device to generate anti-pullout force, so as to realize the installation of the expansion bolt, and the connecting piece is installed at the designated location. The device has a simple structure and is easy to install, so that the connecting piece can be stably installed at places such as walls.

[0015] The expansion bolt can be disassembled by the provided disassembly mechanism, and when the connection piece is cancelled and the expansion bolt is not needed, the nut is screwed off, the limit of the connection piece is released, the gasket, the connection piece and the outer sleeve are removed in sequence, and the disassembly mechanism is inserted into the connecting groove of the screw rod, so that the clamping block is clamped into the clamping groove, the connecting rod is inserted into the connecting groove, and the exposed part of the inner sleeve is pressed against the inner sleeve, so that the inner sleeve is immobile, and the turntable is rotated. Due to the clamping connection of the clamping groove to the clamping block, the disassembly mechanism will drive the screw rod to rotate together. During the rotation of the screw, a gap will appear in the contact between the expansion head and the inner sleeve. When it is rotated to a certain extent, the expansion head will leave the opening, and the inner sleeve can be separated from the screw rod, the inner sleeve can be removed, and the screw rod can be pulled out with force, so that the expansion bolt can be removed. In this way, the expansion bolt can be reused, raw materials can be saved, resources can be used efficiently, energy saving and environmental protection can be achieved, and the influence of the exposed expansion bolt on subsequent construction can be avoided, and the exposed part does not need to be cut off, thereby reducing manpower expenditure. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 It is a structural schematic diagram of the disassembly device of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the assembly device of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the inner sleeve of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the disassembly mechanism of the utility model.

[0021] In the figure: 1. screw; 2. disassembly mechanism; 3. inner sleeve; 4. outer sleeve; 5. connecting piece; 6. gasket; 7. nut; 8. expansion head; 9. bare rod; 10. threaded rod; 11. sleeve body; 12. external thread; 13. opening; 14. connecting groove; 15. engaging groove; 16. turntable; 17. connecting rod; 18. engaging block. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] Embodiment 1, as Figure 1-4 As shown, the detachable expansion bolt is used. When a hole is punched at a designated installation location, after the installation hole is punched, the screw rod 1 is inserted so that the expansion head 8 is inserted into the installation hole, and then the inner sleeve 3 is sleeved on the outer wall of the screw rod 1 so that one end of the inner sleeve 3 enters the installation hole. One end of the sleeve body 11 is provided with an external thread 12. The outer sleeve 4 is rotatably connected to the inner sleeve 3 through the external thread 12, and the inner sleeve 3 is extended. Then, a corresponding hole is punched on the connecting member 5, so that the connecting member 5 is sleeved on the outer sleeve 4 and hung on the screw rod 1. At this time, the gasket 6 is then It is sleeved on the outer wall of the screw 1, and the gasket 6 is pressed against the connecting piece 5 to protect it, and then the nut 7 is screwed onto the screw 1. As the nut 7 rotates on the screw 1, the nut 7 presses against the gasket 6, which will form pressure on the gasket 6, the connecting piece 5, the outer sleeve 4, and the inner sleeve 3, so that the inner sleeve 3 moves toward the direction of the expansion head 8, so that the expansion head 8 squeezes the opening 13, and the opening 13 expands and opens, grabs the inside of the installation hole, forms an anti-pull-out force, and firmly connects the device to the installation point, so that the connecting piece 5 is fixedly connected to the installation point.

[0024] Embodiment 2, as Figure 1-4After the bolt 1 is removed, the nut 7 is unscrewed, the limit of the nut 7 on the bolt 1 is released, and the gasket 6 and the bolt 5 are removed in turn, and the outer sleeve 4 is rotated to remove the inner sleeve 3. At this time, the part originally connected with the inner sleeve 3 and the outer sleeve 4 is exposed outside the mounting hole, against the inner sleeve 3, so that the inner sleeve 3 cannot rotate, and the disassembly mechanism 2 is inserted into the screw rod 1, so that the connecting rod 17 is inserted into the connecting groove 14, and the engaging block 18 is engaged with the engaging groove 15, and then the turntable 16 is rotated, and the turntable 16 drives the connecting rod 17 and the engaging block 18 to rotate. Since the engaging block 18 is engaged with the engaging groove 15, the screw rod 1 is driven to rotate together. With the rotation of the screw rod 1, the expansion head 8 gradually releases the extrusion of the opening 13, and the screw rod 1 gradually moves forward, so that the opening 13 gradually resets, and the inner sleeve 3 is pulled out at this time, and the screw rod 1 is pulled out with force, so the expansion bolt is taken out, and the disassembly work is completed.

[0025] How it works

[0026] It should be noted that the utility model is a detachable expansion bolt. When in use, a hole is drilled at a designated installation location. After the installation hole is drilled, the screw 1 is inserted so that the expansion head 8 is inserted into the installation hole. The inner sleeve 3 is then sleeved on the outer wall of the screw 1 so that one end of the inner sleeve 3 enters the installation hole. The outer sleeve 4 is rotatably connected to the inner sleeve 3 through the external thread 12. The inner sleeve 3 is extended, and a corresponding hole is punched on the connecting piece 5 so that the connecting piece 5 is sleeved on the outer sleeve 4. At this time, the gasket 6 is sleeved on the outer wall of the screw 1, and the gasket 6 is pressed against the connecting piece 5 to protect it. The nut 7 is then screwed onto the screw 1. As the nut 7 rotates on the screw 1, the nut 7 presses against the gasket 6, which will form pressure on the gasket 6, the connecting piece 5, the outer sleeve 4, and the inner sleeve 3, so that the inner sleeve 3 moves toward the direction of the expansion head 8, so that the expansion head 8 The opening 13 is squeezed, and the opening 13 expands and opens, and the mounting hole is gripped to form an anti-pullout force, so that the device is firmly connected to the mounting point. After the connecting member 5 is no longer needed to be fixed, the connecting member 5 needs to be removed. At this time, the part where the inner sleeve 3 and the outer sleeve 4 are originally connected is exposed outside the mounting hole, against the inner sleeve 3, so that the inner sleeve 3 does not rotate, and the disassembly mechanism 2 is inserted into the screw 1, and then the turntable 16 is rotated. The turntable 16 drives the connecting rod 17 and the engaging block 18 to rotate. Since the engaging block 18 is engaged with the engaging groove 15, the screw 1 is driven to rotate together. As the screw 1 rotates, the expansion head 8 gradually releases the squeezing of the opening 13, and the screw 1 gradually moves forward, so that the opening 13 gradually resets. At this time, the inner sleeve 3 is pulled out, and then the screw 1 is pulled out with force, so the expansion bolt is taken out to complete the disassembly work.

[0027] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A detachable expansion bolt, comprising a screw rod (1), characterized in that: The screw (1) comprises an expansion head (8), one end of the expansion head (8) is provided with a smooth rod (9), the other end of the smooth rod (9) is provided with a threaded rod (10), the outer wall of the screw (1) is provided with an inner sleeve (3), the inner sleeve (3) comprises a sleeve body (11), one end of the sleeve body (11) facing the expansion head (8) is provided with a plurality of groups of openings (13), the outer wall of the other end of the sleeve body (11) is provided with an external thread (12), the outer wall of the inner sleeve (3) is provided with an outer sleeve (4), the outer wall of the outer sleeve (4) is provided with a connecting piece (5), a side of the connecting piece (5) away from the screw (1) is provided with a gasket (6), the gasket (6) is located on the outer wall of the screw (1), a nut (7) is provided on the other side of the gasket (6), and the screw The nut (7) is located on the outer wall of the screw rod (1); a connecting groove (14) is provided inside the threaded rod (10); a snap-fit ​​groove (15) is provided inside the screw rod (1); the connecting groove (14) and the snap-fit ​​groove (15) are communicated with each other; a disassembly mechanism (2) is provided at the end of the screw rod (1); the disassembly mechanism (2) comprises a rotating disk (16); a connecting rod (17) is provided on the side of the rotating disk (16) facing the screw rod (1); a snap-fit ​​block (18) is provided at the other end of the connecting rod (17); the connecting rod (17) is located inside the connecting groove (14); and the snap-fit ​​block (18) is located inside the snap-fit ​​groove (15); the disassembly mechanism (2) is located inside the snap-fit ​​groove (15) and the rotating disk (16) of the screw rod (1); and the disassembly mechanism (2) is detachably connected to the screw rod (1).

2. The detachable expansion bolt according to claim 1, characterized in that: The inner sleeve (3) is located on the outer wall of the polished rod (9), and the inner sleeve (3) is detachably connected to the screw rod (1).

3. The detachable expansion bolt according to claim 1, characterized in that: The nut (7) is rotatably connected to the threaded rod (10), and the nut (7) is detachably connected to the threaded rod (1).

4. The detachable expansion bolt according to claim 1, characterized in that: The outer sleeve (4) is rotatably connected to the inner sleeve (3) via an external thread (12), and the outer sleeve (4) and the inner sleeve (3) are detachably connected.

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