Stable rear expanded-base anchor bolt

Abstract

The utility model relates to the technical field of fasteners, in particular to a stable rear underreaming anchor bolt which comprises a sleeve, a limiting seat is fixedly connected to the left side of the top of the sleeve, an underreaming piece is movably connected to the right side of the sleeve, an expanding block is attached to the right side of the inner wall of the underreaming piece, and a gasket is arranged on the left side of the sleeve. A movable nut is arranged on the left side of the gasket, a bolt is fixedly connected to the inner wall of the movable nut, a fastening mechanism is arranged in the limiting seat, and an expansion mechanism is arranged in the sleeve. According to the utility model, the fastening of the sleeve and the opening and closing of the expanding bottom sheet are realized, and the stability and convenience of the device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a stable rear-enlarged bottom anchor bolt. Background Art

[0002] The post-expansion anchor bolt is a bolt that expands the hole at the bottom after drilling a straight hole in the concrete substrate. The cavity after the expansion and the open key of the anchor bolt form an interlocking mechanism to achieve post-anchor connection. It is suitable for anchoring on cracked and non-cracked concrete and can resist vibration loads and impact loads. It has a very high load-bearing capacity and the anchoring effect is equivalent to that of embedded parts.

[0003] The existing device is mainly fixed by expanding the rear bottom of the anchor bolt. The existing technology is similar to a rear expanded bottom anchor bolt. The structure with patent number CN219413157U includes a rear expanded bottom anchor bolt body, and the rear expanded bottom anchor bolt body includes a plurality of connection units and grooves. The grooves are arranged on the surface below the rear expanded bottom anchor bolt body. By providing a groove of an annular structure at the upper end of the expansion groove on the expansion sleeve, the strength of the expansion sleeve can be weakened, which facilitates the expansion of the lower end of the expansion sleeve and easily opens the cut-in substrate, thereby generating an anchoring force. The structure is simple and clear, but the device still has areas that can be optimized.

[0004] The existing device mainly adopts a circular tube shape as a whole, which makes it easy for the outer wall of some anchor bolts to rotate with the embedded hole, making it difficult to unfold the expansion component. At the same time, some devices mainly squeeze the rigid bottom expansion plate by opening and closing the expansion block, making it difficult for some devices to stably drive the expansion block to slide in a limited position, thereby making it difficult for some bottom expansion plates to open and close, reducing the working efficiency and practicality of the device. Therefore, in order to solve the above problems, a stable rear bottom expansion anchor bolt is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a stable rear bottom expansion anchor bolt to solve the problem that the existing devices in the prior art mentioned in the above background technology mainly adopt a circular tube shape as a whole, which makes it easy for the outer wall of some anchor bolts to rotate with the embedded hole, thereby causing the expansion component to be difficult to unfold. At the same time, some devices mainly squeeze the rigid bottom expansion plate through the opening and closing of the expansion block, making it difficult for some devices to stably drive the expansion block to slide in a limited position, thereby causing some bottom expansion plates to be difficult to open and close.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a stable rear bottom expansion anchor bolt, comprising a sleeve, the top left side of the sleeve is fixedly connected to a limited seat, the right side of the sleeve is movably connected to a bottom expansion plate, the right side of the inner wall of the bottom expansion plate is affixed with an expansion block, the left side of the sleeve is provided with a gasket, the left side of the gasket is provided with a movable nut, and the inner wall of the movable nut is fixedly connected with a bolt;

[0007] A fastening mechanism is provided inside the limit seat, and the fastening mechanism includes a movable screw, and the right end of the movable screw is movably connected to the right side of the inner wall of the limit seat. An expansion mechanism is provided inside the sleeve, and the expansion mechanism includes a traction rod, and the left end of the traction rod is fixedly connected to the right end of the bolt, and the right end of the traction rod is fixedly connected to the left middle part of the expansion block.

[0008] Preferably, the left end of the movable screw rod passes through the limiting seat and is fixedly connected to a twist cover, and six slots are opened inside the left side of the twist cover.

[0009] Preferably, a screw sleeve is movably connected to the outer wall of the movable screw rod, a wedge-shaped slider is fixedly connected to the top of the outer wall of the screw sleeve, and a wedge-shaped support is attached to the top of the wedge-shaped slider.

[0010] Preferably, a clamping strip is fixedly connected to the top of the wedge-shaped support platform, springs are fixedly connected to both sides of the bottom of the clamping strip, and the bottom end of the spring is fixedly connected to the middle of the inner wall of the limit seat.

[0011] Preferably, a limit strip is fixedly connected to the lower part of the outer wall of the traction rod, and a limit sliding groove corresponding to the limit strip is formed on the inner wall of the sleeve.

[0012] Preferably, the expansion block has a table shape with a round bottom and a square top.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model uses the structures of the movable screw, twist cover, screw sleeve, wedge-shaped slider, wedge-shaped support, clamping strip and spring in the fastening mechanism. The twist cover is rotated clockwise to drive the movable screw to limit rotation, the movable screw drives the screw sleeve and the wedge-shaped slider to slide to the left, and the wedge-shaped slider drives the wedge-shaped support and the clamping strip to slide upward, so that the clamping strip cooperates with the sleeve to be clamped in the embedded hole, thereby realizing the fastening of the sleeve, so that some devices can limit the sleeve on the inner wall of the embedded hole, which is convenient for the subsequent expansion operation of the anchor bolt, thereby improving the stability and practicality of the device.

[0015] 2. The utility model uses the structures such as the traction rod, the limit bar and the limit slide groove in the expansion mechanism. By rotating the movable nut clockwise, the traction rod is restricted by the limit bar and the limit slide groove, so that the movable nut drives the bolt and the traction rod to slide leftward, and the traction rod drives the expansion block to slide synchronously. The expansion block pushes the expansion plate to rotate and unfold, thereby realizing the expansion of the expansion plate. The partial device can stably drive the expansion block to slide in a limited position, which is convenient for the expansion plate to open and close, thereby improving the convenience and practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view stereogram of the structure of the utility model;

[0017] Figure 2 It is a front view cross-sectional stereoscopic diagram of the structure of the utility model;

[0018] Figure 3 It is a front view cross-sectional stereogram of the local structure of the sleeve and the expansion mechanism of the utility model;

[0019] Figure 4 It is a front view cross-sectional stereoscopic diagram of the local structure of the limit seat and the fastening mechanism of the utility model.

[0020] In the figure: 11, sleeve; 12, limit seat; 13, bottom expansion plate; 14, expansion block; 15, gasket; 16, movable nut; 17, bolt; 2, fastening mechanism; 21, movable screw; 22, twist cover; 23, screw sleeve; 24, wedge-shaped slider; 25, wedge-shaped support; 26, clamping strip; 27, spring; 3, expansion mechanism; 31, traction rod; 32, limit strip; 33, limit slide groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 , an embodiment provided by the utility model:

[0023] A stable rear bottom expansion anchor bolt comprises a sleeve 11, a limited seat 12 is fixedly connected to the left side of the top of the sleeve 11, a bottom expansion piece 13 is movably connected to the right side of the sleeve 11, an expansion block 14 is attached to the right side of the inner wall of the bottom expansion piece 13, a gasket 15 is arranged on the left side of the sleeve 11, a movable nut 16 is arranged on the left side of the gasket 15, and a bolt 17 is fixedly connected to the inner wall of the movable nut 16;

[0024] A fastening mechanism 2 is provided inside the limit seat 12, and the fastening mechanism 2 includes a movable screw 21, the right end of which is movably connected to the right side of the inner wall of the limit seat 12, and the left end of the movable screw 21 passes through the limit seat 12 and is fixedly connected to a twist cover 22. A six-sided slot is provided inside the left side of the twist cover 22, through which the twist cover 22 drives the movable screw 21 to rotate in a limited manner, and the outer wall of the movable screw 21 is movably connected to a screw sleeve 23, and the top of the outer wall of the screw sleeve 23 is fixedly connected to a wedge-shaped slider 24, and a wedge-shaped support 25 is attached to the top of the wedge-shaped slider 24. Through this design, the screw sleeve 23 drives the wedge-shaped slider 24 to slide left and right, and the top of the wedge support 25 is fixedly connected to a clamping strip 26, and the bottom two sides of the clamping strip 26 are fixedly connected to springs 27, and the bottom end of the spring 27 is fixedly connected to the middle part of the inner wall of the limit seat 12. Through this design, the wedge support 25 drives the clamping strip 26 to slide up and down and automatically reset.

[0025] An expansion mechanism 3 is provided inside the sleeve 11, and the expansion mechanism 3 includes a traction rod 31, the left end of the traction rod 31 is fixedly connected to the right end of the bolt 17, and the right end of the traction rod 31 is fixedly connected to the left middle part of the expansion block 14. A limit strip 32 is fixedly connected to the lower part of the outer wall of the traction rod 31, and a limit slide groove 33 corresponding to the limit strip 32 is provided on the inner wall of the sleeve 11. Through this design, the traction rod 31 drives the limit strip 32 to slide left and right inside the limit slide groove 33. The shape of the expansion block 14 is a table with a round bottom and a square top. Through this design, the traction rod 31 drives the expansion block 14 to slide in a limited manner, which facilitates the expansion block 14 to pull the expansion bottom plate 13 to unfold.

[0026] Working principle: when the sleeve 11 needs to be tightened, first rotate the twist cover 22 clockwise, the twist cover 22 drives the movable screw 21 to limit rotation, the movable screw 21 drives the screw sleeve 23 to slide to the left, the screw sleeve 23 drives the wedge-shaped slider 24 to limit sliding, the wedge-shaped slider 24 drives the wedge-shaped support 25 to slide upward, the wedge-shaped support 25 drives the clamping strip 26 to slide upward and stretch the spring 27, so that the clamping strip 26 cooperates with the sleeve 11 to be clamped in the embedded hole, thereby realizing the tightening operation of the sleeve 11.

[0027] When the bottom expansion film 13 needs to be expanded, firstly, the movable nut 16 is rotated clockwise. The traction rod 31 is restricted by the limit bar 32 and the limit slide groove 33, so that the movable nut 16 drives the bolt 17 and the traction rod 31 to slide to the left, and the traction rod 31 drives the expansion block 14 to slide synchronously. The expansion block 14 pushes the bottom expansion film 13 to limit the rotation and unfold, thereby realizing the expansion operation of the bottom expansion film 13. The operation ends here.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A stable rear bottom anchor bolt, comprising a sleeve (11), characterized in that: The left side of the top of the sleeve (11) is fixedly connected to a limited seat (12), the right side of the sleeve (11) is movably connected to a bottom expansion plate (13), the right side of the inner wall of the bottom expansion plate (13) is attached to an expansion block (14), the left side of the sleeve (11) is provided with a gasket (15), the left side of the gasket (15) is provided with a movable nut (16), and the inner wall of the movable nut (16) is fixedly connected with a bolt (17); A fastening mechanism (2) is provided inside the limit seat (12), and the fastening mechanism (2) comprises a movable screw rod (21), and the right end of the movable screw rod (21) is movably connected to the right side of the inner wall of the limit seat (12). An expansion mechanism (3) is provided inside the sleeve (11), and the expansion mechanism (3) comprises a traction rod (31), and the left end of the traction rod (31) is fixedly connected to the right end of the bolt (17), and the right end of the traction rod (31) is fixedly connected to the middle part of the left side of the expansion block (14).

2. A stable rear bottom anchor bolt according to claim 1, characterized in that: The left end of the movable screw rod (21) passes through the limiting seat (12) and is fixedly connected to a twist cover (22), and six slots are provided inside the left side of the twist cover (22).

3. A stable rear bottom anchor bolt according to claim 2, characterized in that: The outer wall of the movable screw rod (21) is movably connected with a screw sleeve (23), the top of the outer wall of the screw sleeve (23) is fixedly connected with a wedge-shaped slider (24), and a wedge-shaped support platform (25) is attached above the wedge-shaped slider (24).

4. A stable rear bottom anchor bolt according to claim 3, characterized in that: The top of the wedge-shaped support platform (25) is fixedly connected to a clamping strip (26), and both sides of the bottom of the clamping strip (26) are fixedly connected to springs (27), and the bottom end of the spring (27) is fixedly connected to the middle of the inner wall of the limiting seat (12).

5. A stable rear bottom anchor bolt according to claim 1, characterized in that: A limit strip (32) is fixedly connected to the lower portion of the outer wall of the traction rod (31), and a limit sliding groove (33) corresponding to the limit strip (32) is provided on the inner wall of the sleeve (11).

6. A stable rear bottom anchor bolt according to claim 1, characterized in that: The expansion block (14) is in the shape of a table with a round bottom and a square top.

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