Expansion anchor bolt with corrugated sleeve

Abstract

The expansion anchor bolt comprises an expansion rod, a sleeve, an expansion cylinder, a spacing cylinder, a nut, a gasket, a tensioning mechanism and a contraction mechanism, threads are arranged on the expansion rod, the sleeve is arranged on the expansion rod in a sleeved mode, the sleeve is in a wave shape, a plurality of expansion grooves are formed in the expansion cylinder, the expansion cylinder is fixedly connected with one end of the sleeve, and the other end of the sleeve is fixedly connected with the nut. The spacer cylinder is fixedly connected to the other end of the sleeve, the nut is arranged on the expansion rod and is in threaded connection with the threads, the gasket is fixedly connected to the spacer cylinder, the tensioning mechanism is arranged in the spacer cylinder and is used for connecting the spacer cylinder and the expansion cylinder, and the shrinking mechanism is arranged in the expansion cylinder and is used for shrinking the expanded expansion cylinder. According to the expansion anchor bolt with the corrugated sleeve, the problems that the anchoring size of the expansion anchor bolt is limited, the internal force of the screw cannot be released and the like are more effectively solved, and quick disassembly is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion anchor bolts, in particular to an expansion anchor bolt with a corrugated sleeve. Background Art

[0002] Expansion anchor bolts are anchor bolts that use expansion parts to squeeze the wall of the anchor hole to form an anchoring effect. When using ordinary expansion anchor bolts, you must first use an impact drill to drill a hole of the corresponding size on the fixed body, and then install the bolt and sleeve into the hole, tighten the nut, and put a sleeve slightly larger than the bolt diameter on the outside of the bolt, with several openings at the tail. When the bolt is tightened, the expansion head at the tail of the bolt is brought into the sleeve to achieve the purpose of expansion. This type of expansion anchor bolt has a limited distance for the expansion head to enter the sleeve. When the thickness of the clamped component is not the same as the thickness of the bolt that can be clamped, it is difficult to use. Not only that, the torque applied during the bolt installation process will cause the bolt itself to generate internal force and cannot be released, resulting in insufficient anchoring capacity.

[0003] There are a small number of expansion anchors with plastic sleeves. The stress mechanism of the sleeve is that the plastic sleeve is sheared by applying torque, resulting in brittle failure. At this time, the upper annular area of ​​the sleeve directly enters the lower part, making the upper extension sleeve at risk of sudden sliding, causing inconvenience in installation.

[0004] In order to ensure smooth anchoring, existing expansion sleeves are usually locally weakened, such as by drilling holes or making external grooves. However, this method cannot completely ensure that the blades are fully opened during installation, resulting in insufficient anchoring force. Utility Model Content

[0005] (1) Technical problems solved

[0006] In response to the shortcomings of the existing technology, the utility model provides an expansion anchor with a corrugated sleeve, which can more effectively solve the problems of limited anchoring size of the expansion anchor and inability to release the internal force of the screw. Since the destruction mode of the corrugated sleeve is gradual and smooth destruction in sections, the problem of sudden drop in torque and displacement during installation caused by the plastic sleeve made by the punching principle will not occur.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned object, the present invention provides the following technical solutions: an expansion anchor with a corrugated sleeve, comprising: an expansion rod, a sleeve, an expansion cylinder, a spacer cylinder, a nut, a gasket, a tensioning mechanism, and a contraction mechanism;

[0009] The expansion rod is provided with a thread;

[0010] The sleeve is sleeved on the expansion rod, and the sleeve is wavy;

[0011] The expansion cylinder is provided with a plurality of expansion slots, and the expansion cylinder is fixedly connected to one end of the sleeve;

[0012] The spacer cylinder is fixedly connected to the other end of the sleeve;

[0013] The nut is arranged on the expansion rod and is threadedly connected to the thread;

[0014] The gasket is fixedly connected to the spacer cylinder;

[0015] The tensioning mechanism is arranged in the spacer cylinder and is used to connect the spacer cylinder and the expansion cylinder;

[0016] The contraction mechanism is arranged in the expansion cylinder and is used to contract the expanded expansion cylinder.

[0017] Preferably, the tensioning mechanism comprises: a tensioning rod and a slider;

[0018] There are multiple tension rods, and one end of each of the tension rods is fixedly connected to the expansion cylinder;

[0019] There are multiple sliders, and the multiple sliders are all slidably connected in the spacer tube. The other ends of the multiple tension rods are respectively fixedly connected to the multiple sliders.

[0020] Furthermore, the retracting mechanism includes: a retracting rod, a moving block and a limiting ring;

[0021] There are multiple contraction rods, and one end of each of the contraction rods is rotatably connected to the expansion cylinder;

[0022] There are multiple moving blocks, each of which is slidably arranged on the expansion rod, and the other ends of the multiple contraction rods are fixedly connected to the multiple moving blocks respectively;

[0023] The limiting ring is fixedly connected to the expansion rod, and a plurality of the contraction rods are each provided with a sliding groove, and the limiting ring is slidably and rotatably arranged in the plurality of sliding grooves.

[0024] Furthermore, a plurality of sliding boxes are fixedly connected in the spacer cylinder, and the plurality of sliding blocks are slidably arranged in the plurality of sliding boxes respectively.

[0025] As a further solution of the present application, a plurality of clamping blocks are fixedly connected to the expansion cylinder, and the sleeve is fixedly connected to the plurality of clamping blocks.

[0026] As a further solution of the present application, a plurality of limiting protrusions are provided on the expansion cylinder.

[0027] (3) Beneficial effects

[0028] Compared with the prior art, the present invention provides an expansion anchor with a corrugated sleeve, which has the following beneficial effects:

[0029] 1. In the present invention, by setting the sleeve, one end of the expansion rod has a longer distance to enter the expansion cylinder during the anchoring process, while releasing the internal force in the expansion rod, thereby enhancing the anchoring ability.

[0030] 2. In the utility model, the sleeve is arranged in a wave shape. During the installation process, each ring of the sleeve will gradually unload the force smoothly and slowly according to the size of the compression. At the same time, the sleeve will expand and bulge in the annular direction, which can better engage the expansion rod inward. Under special working conditions that need to meet seismic requirements, it is beneficial for the expansion rod and the sleeve to work together.

[0031] 3. In the present invention, by providing the tensioning mechanism and the contraction mechanism, when the expansion anchor needs to be disassembled, when the expansion anchor is pulled out of the hole, even if the sleeve is broken, the expanded expansion cylinder can be retracted again and pulled out of the hole together with the spacer cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the overall structure of this application;

[0033] Figure 2 A schematic diagram of the structure of the cross-section of this application;

[0034] Figure 3 This is a structural diagram of the tensioning mechanism of this application;

[0035] Figure 4 This is a structural diagram of the contraction mechanism of this application.

[0036] In the figure: 1. expansion rod; 2. sleeve; 3. expansion cylinder; 4. spacer cylinder; 5. nut; 6. gasket; 7. tension rod; 8. slider; 9. retraction rod; 10. moving block; 11. limiting ring; 12. slide box; 13. clamping block; 14. limiting protrusion. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] See also Figures 1 to 4, an expansion anchor with a corrugated sleeve, comprising: an expansion rod 1, a sleeve 2, an expansion cylinder 3, a spacer cylinder 4, a nut 5, a gasket 6, a tightening mechanism and a contraction mechanism. The expansion cylinder 3 is provided with a plurality of limiting protrusions 14, the expansion cylinder 3 is fixedly connected to a plurality of blocks 13, the sleeve 2 is fixedly connected to the plurality of blocks 13, the expansion rod 1 is provided with a thread, the sleeve 2 is sleeved on the expansion rod 1, the sleeve 2 is wavy, and a plurality of expansion grooves are opened on the expansion cylinder 3. The expansion cylinder 3 is fixedly connected to one end of the sleeve 2, the spacer cylinder 4 is fixedly connected to the other end of the sleeve 2, the nut 5 is provided on the expansion rod 1 and threadedly connected to the thread, and the gasket 6 is fixedly connected to the spacer cylinder 4.

[0039] Among them, the tensioning mechanism is arranged in the spacer tube 4, which is used to connect the spacer tube 4 and the expansion tube 3. The tensioning mechanism includes: a tensioning rod 7 and a slider 8. A plurality of sliding boxes 12 are fixedly connected in the spacer tube 4, and a plurality of sliders 8 are respectively slidably arranged in the plurality of sliding boxes 12. There are a plurality of tensioning rods 7, and one end of the plurality of tensioning rods 7 is fixedly connected in the expansion tube 3. There are a plurality of sliders 8, and a plurality of sliders 8 are slidably connected in the spacer tube 4. The other ends of the plurality of tensioning rods 7 are respectively fixedly connected to the plurality of sliders 8. Specifically, when the expansion anchor needs to be pulled out of the hole, the spacer tube 4 and the expansion tube 3 are connected by the tensioning rod 7. Even if the sleeve 2 is disconnected, the expansion tube 3 can be pulled out and slid in the spacer tube 4 by the slider 8, thereby not affecting the movement of the interval.

[0040] Among them, the contraction mechanism is arranged in the expansion cylinder 3, which is used to contract the expanded expansion cylinder 3. The contraction mechanism includes: a contraction rod 9, a moving block 10 and a limiting ring 11. There are multiple contraction rods 9, and one end of the multiple contraction rods 9 is rotatably connected to the expansion cylinder 3. There are multiple moving blocks 10, and the multiple moving blocks 10 are slidably arranged on the expansion rod 1. The other ends of the multiple contraction rods 9 are respectively fixedly connected to the multiple moving blocks 10, and the limiting ring 11 is fixedly connected to the expansion rod 1. A plurality of contraction rods 9 are provided with a slide groove, and the limiting ring 11 is slidably and rotatably arranged in the multiple slide grooves. Specifically, when the expansion rod 1 is pulled out of the hole, the expansion rod 1 will drive the contraction rod 9 to move. When the contraction rod 9 moves, it passes through the limit of the limit, so that the end connected to the expansion cylinder 3 is retracted, and then the expanded expansion cylinder 3 is retracted, which is convenient for pulling out of the hole.

[0041] In summary, when using this expansion anchor with a corrugated sleeve, for anchoring, the expansion anchor is first placed in the prepared hole. After the anchor is inserted, the washer and nut 5 are sequentially inserted into the expansion rod 1. A torque wrench is used to apply torque to the nut 5. As the spacer tube 4 squeezes the sleeve 2, the sleeve 2 is axially compressed and simultaneously expands and bulges outward. The expansion rod 1 is continuously pulled into the expansion tube 3, causing the expansion tube 3 to expand, thus completing the installation.

[0042] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An expansion anchor with a corrugated sleeve, characterized in that: include: An expansion rod (1), wherein the expansion rod (1) is provided with threads; A sleeve (2), wherein the sleeve (2) is sleeved on the expansion rod (1), and the sleeve (2) is wavy; An expansion cylinder (3), wherein a plurality of expansion slots are provided on the expansion cylinder (3), and the expansion cylinder (3) is fixedly connected to one end of the sleeve (2); a spacer cylinder (4), wherein the spacer cylinder (4) is fixedly connected to the other end of the sleeve (2); a nut (5), the nut (5) being arranged on the expansion rod (1) and being threadedly connected to the thread; a gasket (6), the gasket (6) being fixedly connected to the spacer cylinder (4); a tensioning mechanism, the tensioning mechanism being arranged in the spacer cylinder (4) and being used for connecting the spacer cylinder (4) and the expansion cylinder (3); A contraction mechanism is provided in the expansion cylinder (3) and is used to contract the expanded expansion cylinder (3).

2. The expansion anchor with a corrugated sleeve according to claim 1, characterized in that: The tensioning mechanism comprises: A tension rod (7), wherein a plurality of tension rods (7) are provided, and one end of each of the plurality of tension rods (7) is fixedly connected to the expansion cylinder (3); A slider (8), wherein a plurality of sliders (8) are provided, and the plurality of sliders (8) are all slidably connected in the spacer tube (4), and the other ends of the plurality of tension rods (7) are respectively fixedly connected to the plurality of sliders (8).

3. The expansion anchor with a corrugated sleeve according to claim 2, characterized in that: The contraction mechanism comprises: A contraction rod (9), wherein a plurality of contraction rods (9) are provided, and one end of each of the plurality of contraction rods (9) is rotatably connected to the expansion cylinder (3); A moving block (10), wherein a plurality of the moving blocks (10) are provided, and the plurality of moving blocks (10) are all slidably arranged on the expansion rod (1), and the other ends of the plurality of contraction rods (9) are respectively fixedly connected to the plurality of moving blocks (10); A limiting ring (11) is fixedly connected to the expansion rod (1), and a plurality of contraction rods (9) are provided with sliding grooves. The limiting ring (11) is slidably and rotatably arranged in the plurality of sliding grooves.

4. The expansion anchor with a corrugated sleeve according to claim 3, characterized in that: A plurality of slide boxes (12) are fixedly connected in the spacer cylinder (4), and the plurality of sliders (8) are slidably arranged in the plurality of slide boxes (12) respectively.

5. The expansion anchor with a corrugated sleeve according to claim 4, characterized in that: A plurality of clamping blocks (13) are fixedly connected to the expansion cylinder (3), and the sleeve (2) is fixedly connected to the plurality of clamping blocks (13).

6. The expansion anchor with a corrugated sleeve according to claim 5, characterized in that: The expansion cylinder (3) is provided with a plurality of limiting protrusions (14).

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