Adjustable expansion anchor bolt

Abstract

The utility model discloses an adjustable expansion anchor bolt, and relates to the technical field of expansion anchor bolts. The device comprises an expansion assembly, the upper end of the expansion assembly is in threaded fit with a guide assembly, and the guide assembly is in threaded fit with an adjusting assembly; the guiding assembly comprises a connecting base in threaded fit with the upper end of the expansion assembly, the upper end of the connecting base is rotationally matched with an L-shaped steering block, a pressed part is in sliding fit in the connecting base, a gear is arranged on the upper end face of the pressed part, a groove hole is formed in the lower end face of the L-shaped steering block, and a screw hole is formed in one end face. The connecting base and the L-shaped steering block are designed to be of a split type running fit structure, the defect that in a traditional integrated design, the angle is fixed after an adjusting assembly is installed is overcome, the inner gear ring is meshed with the gear, multi-angle adjustment and convenient fixing of the L-shaped steering block relative to the connecting base are facilitated, and the adjusting effect is good. Length compensation at multiple angles is achieved through cooperation of the screw holes and the adjusting assemblies.

Description

Technical Field

[0001] This utility model belongs to the field of expansion anchors, specifically, it relates to an adjustable expansion anchor. Background Technology

[0002] Adjustable expansion anchors are mechanical anchoring devices used to fix objects in concrete, masonry, and other substrates. Their core feature is that the anchor length or angle can be flexibly adjusted through a specific structural design to adapt to construction needs for different installation depths or directions.

[0003] Chinese Patent No. CN211259281U discloses a horizontally adjustable and tightenable expansion anchor bolt, comprising: an expansion sleeve, an expansion head fixedly connected to the bottom end face of the expansion sleeve, a fastening bolt connected to the interior of the expansion sleeve and the expansion head, a spring washer movably sleeved on the outside of the fastening bolt and above the expansion sleeve, a buffer washer sleeved on the outside of the fastening bolt and between the spring washer and the expansion sleeve when the fastening bolt and the expansion sleeve are connected, and a connecting post welded to the top end face of the fastening bolt.

[0004] The horizontally adjustable and tightenable expansion anchor disclosed in the application has an integral structure of connecting cylinder and elbow rod. Therefore, when the reversing structure is tightened on the connecting column, the orientation of the horizontal adjustment mother part is also fixed, and it is difficult to adjust the angle of the horizontal adjustment mother part in the future, which can easily affect the applicability of the device. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an adjustable expansion anchor bolt, which solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] An adjustable expansion anchor includes: an expansion component, a guide component threadedly fitted to the upper end of the expansion component, an adjustment component threadedly fitted to the guide component, and the adjustment component being located above the expansion component;

[0008] The guiding assembly includes a connecting seat threaded onto the upper end of the expansion assembly. The upper end of the expansion assembly is located inside the connecting seat. An L-shaped steering block is rotatably fitted onto the upper end of the connecting seat, and a pressure-bearing component is slidably fitted inside. A gear is provided on the upper end face of the pressure-bearing component. A slot is provided on the lower end face of the L-shaped steering block, and a threaded hole is provided on one end face. The upper end of the connecting seat is located inside the slot. One end of the adjusting assembly is threaded onto the threaded hole. An internal gear ring is installed around the slot. The internal gear ring is located around the gear and meshes with the gear. A guide rod is installed on the upper end face of the gear. A slot is provided on the upper end face of the slot. The upper end of the guide rod is located inside the slot. A spring is placed inside the slot. The spring is sleeved around the guide rod and is located between the upper end face of the gear and the slot.

[0009] Optionally, the expansion assembly includes a screw, a spring washer, and a flat washer. A connecting seat is threaded onto the upper end of the screw. A nut is threaded onto the circumference of the screw, a sleeve is fitted on it, and a tapered head is provided on the lower end face. The spring washer and the flat washer are both fitted onto the circumference of the screw. The nut is located below the connecting seat, the spring washer is located between the nut and the flat washer, and the sleeve is located between the flat washer and the tapered head.

[0010] Optionally, the connecting seat includes a screw cylinder, with the upper end of the screw threadedly fitted inside the screw cylinder. The upper end face of the screw cylinder is provided with a cylindrical section, the upper end of which is located in a slot. The pressure-bearing component is slidably fitted inside the cylindrical section and is located on the upper end face of the screw. The lower part of the L-shaped steering block is rotatably fitted on the circumference of the cylindrical section. The pressure-bearing component includes a circular plate and two guide blocks. The guide blocks are located on the side of the circular plate, and the circular plate is located between the two guide blocks. The circular plate is located on the upper end face of the screw and is slidably fitted inside the cylindrical section. A gear is located on the upper end face of the circular plate. The inner wall of the cylindrical section is provided with two guide grooves, and the guide blocks are slidably fitted in the corresponding guide grooves.

[0011] Optionally, a ring is installed around the slot, the ring is located below the internal gear ring, and a rotating groove corresponding to the ring is provided around the cylinder, the ring being rotated and fitted in the rotating groove.

[0012] Optionally, the adjusting component includes a stud threaded into a screw hole, the stud being located above the screw rod, the stud having a vertical square groove extending through the stud, and an adjusting element disposed within the square groove.

[0013] Optionally, the adjusting component includes a screw and two sliders. The two sliders are slidably engaged on both sides of the square groove. A square post is installed between the two sliders. A bolt is installed on the square post. The lower end of the bolt is threaded into the square post. The end face of the bolt away from the L-shaped steering block has a slot that is connected to the square groove. One end of the screw passes through the slot laterally and is threaded into one side of the square post. Both sides of the square groove have sliding grooves. A row of rectangular grooves is provided on the lower side of the sliding grooves. The rectangular grooves are connected to the square groove. Each row of rectangular grooves includes multiple rectangular grooves arranged laterally at equal intervals. The slider is engaged in the corresponding rectangular groove.

[0014] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0015] By designing the connecting seat and the L-shaped steering block as a separate rotating fit structure, the defect of fixing the angle after the adjustment component is installed in the traditional integrated design is solved. The internal gear ring meshes with the gear, which facilitates the multi-angle adjustment and convenient fixation of the L-shaped steering block relative to the connecting seat. The length compensation under multiple angles is achieved through the cooperation of the screw hole and the adjustment component, which improves the horizontal adjustment range of the expansion anchor bolt and thus improves the adaptability of the device to different installation scenarios.

[0016] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0018] In the picture:

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the expansion component;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the expansion component;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the guide component;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the adjustment component.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] Nut 1, Sleeve 2, Conical head 3, Spring washer 4, Flat washer 5, Screw 6, Connecting seat 7, L-shaped steering block 8, Stud 9, Square column 10, Screw 11, Bolt 12, Square groove 13, Slide groove 14, Rectangular groove 15, Pressure-bearing component 16, Gear 17, Internal gear ring 18, Slot hole 19, Spring 20, Guide rod 21, Guide groove 22, Screw barrel 23, Cylinder 24, Screw hole 25, Guide block 26, Circular plate 27.

[0025] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0026] 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.

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] In fields such as building construction, interior decoration, and equipment installation, reliable fixed connections are crucial. Traditional anchors often suffer from poor fixing effects and limited applicability when dealing with substrates of different materials and thicknesses, as well as complex working conditions. To solve these problems, an adjustable expansion anchor has emerged. Through innovative structural design and adjustment mechanisms, it achieves flexible adjustment of anchoring force, demonstrating strong adaptability and reliability in various application scenarios, and providing a more efficient and stable solution for various fixing operations.

[0029] The main structure of an adjustable expansion anchor consists of a screw, an expansion sleeve, an adjusting nut, and a locking mechanism. The screw, as the primary load-bearing component, is typically made of high-strength alloy steel and undergoes heat treatment to enhance its strength and toughness, enabling it to withstand significant tensile and shear forces. One end of the screw is threaded for engagement with the adjusting nut; the other end is designed with a pointed or flat head. The pointed end facilitates easy insertion of the anchor after drilling a hole in the base material, while the flat head is suitable for installation in existing holes. The expansion sleeve, fitted over the screw, is generally made of an expandable and deformable metal material, such as carbon steel or stainless steel. Its outer wall features an annular groove or serrated structure to create a tight fit with the base material after expansion, enhancing the anchoring effect. A certain gap exists between the inner wall of the expansion sleeve and the screw to allow the screw to move freely within it and to provide space for expansion deformation.

[0030] The adjusting nut is a key component for enabling the adjustable function of the anchor bolt. It is screwed onto the threaded end of the screw rod. By rotating the adjusting nut, the expansion sleeve can be moved axially along the screw rod. When the adjusting nut is screwed towards the head of the screw rod, axial pressure is applied to the expansion sleeve, causing it to expand radially under pressure, compressing the base material and thus generating anchoring force. Conversely, when the adjusting nut is screwed in the opposite direction, the pressure on the expansion sleeve decreases, the degree of expansion decreases, and the anchoring force also decreases. The design of the adjusting nut fully considers the convenience and stability of operation. Its outer surface is usually equipped with anti-slip textures or knurling, making it easy for construction personnel to operate with a wrench or screwdriver, while ensuring that slippage does not easily occur under force.

[0031] The function of locking components is to ensure the anchor bolt position is fixed after adjustment, preventing the adjusting nut from loosening due to vibration, external forces, or other factors during use, thus reducing the anchoring force. Common locking components include spring washers, nylon lock nuts, and anti-loosening adhesive. Spring washers are installed between the adjusting nut and the base surface. When the adjusting nut is tightened, the spring washer is compressed, generating elastic deformation and creating a reverse frictional force to prevent the adjusting nut from loosening. Nylon lock nuts have a nylon ring embedded inside. When the nut is tightened, the nylon ring fits tightly against the screw thread, increasing the friction between the threads and preventing loosening. Anti-loosening adhesive is applied to the screw thread or the contact surface between the nut and the base during installation. After curing, it forms an adhesive layer that firmly bonds the nut and screw, effectively preventing loosening.

[0032] In actual installation, adjustable expansion anchors demonstrate convenience and efficiency. First, select an anchor of appropriate size based on the type and thickness of the substrate material. For hard substrates such as concrete and stone, anchors with larger diameters and longer lengths can be used to ensure sufficient anchoring depth and force; for softer substrates such as brick walls and gypsum board, smaller anchors are selected. Next, use a drilling tool to drill a hole in the substrate that matches the anchor's size. The hole depth should be slightly greater than the anchoring length to ensure complete insertion. After inserting the anchor into the hole, use a wrench or screwdriver to tighten the adjusting nut. As the nut rotates, the expansion sleeve gradually expands until the required anchoring force is achieved. During tightening, the anchoring force can be checked using tensile testing equipment or experience to ensure it meets the requirements. Finally, install the locking mechanism to complete the anchor's secure installation.

[0033] Adjustable expansion anchors perform exceptionally well in a variety of applications. In the construction industry, they can be used to secure steel structures, curtain wall joists, pipe supports, etc., adapting to different loads and working conditions through flexible adjustment of the anchoring force. For example, in the installation of curtain walls in high-rise buildings, due to significant differences in wind loads across different floors, the expansion degree of the anchors can be adjusted based on actual calculations to firmly fix the curtain wall joists to the main building structure, while avoiding damage to the substrate due to excessive anchoring force. In the interior decoration industry, adjustable expansion anchors are suitable for installing chandeliers, air conditioner outdoor units, bathroom fixtures, etc. Whether on concrete walls, brick walls, or hollow brick walls, reliable fixation can be achieved through adjustment, solving the problem of poor applicability of traditional anchors on different substrates. In the equipment installation industry, for equipment that requires frequent disassembly and reinstallation, the adjustability of adjustable expansion anchors makes installation and disassembly more convenient, while ensuring ideal fixation results every time.

[0034] Compared to traditional anchors, adjustable expansion anchors offer significant advantages. The anchoring force of traditional anchors is difficult to change once installed. If the actual load differs from the design load, either insufficient anchoring force leads to insecure fixing, or excessive anchoring force damages the substrate. Adjustable expansion anchors, on the other hand, allow for flexible adjustment of the anchoring force according to actual needs, greatly improving the reliability and safety of the fixation. Furthermore, traditional anchors have limited applicability to different substrate materials, often requiring the selection of different types of anchors for different substrates, increasing construction costs and complexity. Adjustable expansion anchors, with their adjustable characteristics, achieve good fixing results on a variety of substrates, reducing construction difficulty and costs.

[0035] Please see Figure 1-4 As shown, this embodiment provides an adjustable expansion anchor, including: an expansion component, a guide component threadedly fitted to the upper end of the expansion component, an adjustment component threadedly fitted to the guide component, and the adjustment component being located above the expansion component;

[0036] The guide assembly includes a connecting seat 7 threaded onto the upper end of the expansion assembly. The upper end of the expansion assembly is located inside the connecting seat 7. An L-shaped steering block 8 is rotatably fitted onto the upper end of the connecting seat 7, and a pressure-bearing component 16 is slidably fitted inside. A gear 17 is provided on the upper end face of the pressure-bearing component 16. A slot 19 is provided on the lower end face of the L-shaped steering block 8, and a screw hole 25 is provided on one end face. The upper end of the connecting seat 7 is located inside the slot 19. One end of the adjustment assembly is threaded onto the screw hole 25. An internal gear ring 18 is installed around the slot 19. The internal gear ring 18 is located around the gear 17 and meshes with the gear 17. A guide rod 21 is installed on the upper end face of the gear 17. A slot is provided on the upper end face of the slot 19. The upper end of the guide rod 21 is located inside the slot. A spring 20 is placed inside the slot 19. The spring 20 is sleeved around the guide rod 21 and is located between the gear 17 and the upper end face of the slot 19.

[0037] One application of this embodiment is as follows: In use, the expansion assembly is first fixed in the pre-drilled mounting hole, and then the connecting seat 7 is tightened onto the upper end of the expansion assembly. During this process, the upper end of the expansion assembly presses against the pressure member 16 inside the connecting seat 7, forcing the pressure member 16 to slide upward along the inner wall of the connecting seat 7, thereby driving the gear 17 and the guide rod 21 to move upward synchronously. At this time, the spring 20 sleeved around the guide rod 21 is compressed. When the gear 17 approaches the internal gear ring 18, the L-shaped steering block 8 is manually rotated to the required angle and supported and fixed. Then, the connecting seat 7 is tightened further to make the gear 17 fully mesh with the internal gear ring 18, thereby limiting the rotational misalignment of the L-shaped steering block 8 and the connecting seat 7. Finally, the adjusting assembly is rotated into the screw hole 25 to adjust its length and fix the external object, thereby completing the coordinated locking of multiple angles and lengths. It should be noted that all electrical devices involved in this application can be powered by a battery or an external power source.

[0038] By designing the connecting seat 7 and the L-shaped steering block 8 as a separate rotating fit structure, the defect of fixing the angle after the adjustment component is installed in the traditional integrated design is solved. The internal gear ring 18 meshes with the gear 17, which facilitates the multi-angle adjustment and convenient fixation of the L-shaped steering block 8 relative to the connecting seat 7. The screw hole 25 cooperates with the adjustment component to achieve length compensation at multiple angles, improve the range of horizontal adjustment of the expansion anchor bolt, and thus improve the adaptability of the device to different installation scenarios.

[0039] like Figure 1 , 2 As shown, the expansion assembly in this embodiment includes a screw 6, a spring washer 4, and a flat washer 5. A connecting seat 7 is threaded onto the upper end of the screw 6. A nut 1 is threaded onto the circumference of the screw 6, a sleeve 2 is fitted on it, and a tapered head 3 is provided on the lower end face. The spring washer 4 and the flat washer 5 are both fitted onto the circumference of the screw 6. The nut 1 is located below the connecting seat 7, the spring washer 4 is located between the nut 1 and the flat washer 5, and the sleeve 2 is located between the flat washer 5 and the tapered head 3. By utilizing the cooperation of the spring washer 4 and the flat washer 5, the buffering effect of the preload force when the nut 1 is tightened is enhanced, reducing the probability of the expansion assembly becoming loose.

[0040] like Figure 3 As shown, the connecting seat 7 in this embodiment includes a screw cylinder 23, with hexagonal blocks on its periphery. The upper end of the screw rod 6 is threaded into the screw cylinder 23. A cylinder 24 is provided on the upper end face of the screw cylinder 23, with the upper end of the cylinder 24 located in the slot 19. The pressure-bearing member 16 is slidably fitted into the cylinder 24 and is located on the upper end face of the screw rod 6. The lower part of the L-shaped steering block 8 is rotatably fitted onto the periphery of the cylinder 24. The hexagonal blocks facilitate the application of force to rotate the connecting seat 7 with the aid of tools. The threaded connection between the screw cylinder 23 and the screw rod 6 facilitates the use of the screw rod 6 to compress the pressure-bearing member 16 inside the cylinder 24.

[0041] like Figure 3 As shown, the pressure-bearing component 16 in this embodiment includes a circular plate 27 and two guide blocks 26. The guide blocks 26 are located on the side of the circular plate 27, and the circular plate 27 is located between the two guide blocks 26. The circular plate 27 is located on the upper end face of the screw 6. The circular plate 27 is slidably fitted inside the cylinder 24. The gear 17 is located on the upper end face of the circular plate 27. The inner wall side of the cylinder 24 is provided with two guide grooves 22. The guide blocks 26 are slidably fitted in the corresponding guide grooves 22. By cooperating with the guide blocks 26 and the guide grooves 22, the stability of the circular plate 27 when sliding is improved, thereby improving the stability of the gear 17 when sliding.

[0042] like Figure 3As shown, in this embodiment, a ring is installed around the slot 19. The ring is located below the internal gear ring 18. A rotating groove corresponding to the ring is provided around the cylinder 24. The ring rotates and fits in the rotating groove. By cooperating with the ring and the rotating groove, the stability of the L-shaped steering block 8 when rotating is improved, and the probability of the internal gear ring 18 disengaging from the gear 17 after meshing is reduced.

[0043] like Figure 4 As shown, the adjustment component of this embodiment includes a stud 9 threaded into a screw hole 25. The stud 9 is located above the screw rod 6. The stud 9 has a vertical square groove 13 that passes through the stud 9. An adjustment component is provided in the square groove 13. By cooperating with the square groove 13 and the adjustment component, the length of the adjustment component can be quickly locked, improving the convenience of the anchor bolt in operation in a confined space.

[0044] like Figure 4 As shown, the adjusting component in this embodiment includes a screw 11 and two sliders. The two sliders are slidably engaged on both sides of the square groove 13. A square post 10 is installed between the two sliders. A bolt 12 is provided on the square post 10. The lower end of the bolt 12 is threaded into the square post 10. The end face of the stud 9 away from the L-shaped steering block 8 is provided with a slot. The slot is connected to the square groove 13. One end of the screw 11 passes through the slot laterally and is threaded into one side of the square post 10. By replacing the screw 11 with the required length, it is easy to fix the square post 10. The bolt 12 is engaged with the square post 10, which facilitates connection and fixation with external objects.

[0045] like Figure 4 As shown, in this embodiment, the square groove 13 is provided with sliding grooves 14 on both sides, and a row of rectangular grooves 15 is provided on the lower side of the sliding grooves 14. The rectangular grooves 15 are connected to the square groove 13. Each row of rectangular grooves 15 includes multiple rectangular grooves 15 arranged horizontally at equal intervals. The slider is engaged in the corresponding rectangular groove 15. By cooperating with the rectangular grooves 15 and the sliding grooves 14, it is convenient to adjust the horizontal position of the square column 10 by embedding the slider into different rectangular grooves 15, thereby reducing the probability of the fixed square column 10 sliding horizontally.

[0046] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. An adjustable expansion anchor, characterized in that, include: An expansion assembly, with a guide assembly threaded into its upper end, and an adjustment assembly threaded into the guide assembly. The guide assembly includes a connecting seat (7) threaded onto the upper end of the expansion assembly. The upper end of the connecting seat (7) is rotatably fitted with an L-shaped steering block (8) and an inner sliding fitting with a pressure-bearing component (16). The upper end face of the pressure-bearing component (16) is provided with a gear (17). The lower end face of the L-shaped steering block (8) is provided with a slot (19) and one end face is provided with a screw hole (25). One end of the adjustment assembly is threaded into the screw hole (25). An internal gear ring (18) is installed around the slot (19). The internal gear ring (18) meshes with the gear (17). A guide rod (21) is installed on the upper end face of the gear (17). A slot is provided on the upper end face of the slot (19). A spring (20) is placed inside the slot (19). The spring (20) is sleeved around the guide rod (21).

2. The adjustable expansion anchor bolt according to claim 1, characterized in that, The expansion assembly includes a screw (6), a spring washer (4), and a flat washer (5). A connecting seat (7) is threaded onto the upper end of the screw (6). The screw (6) is threaded onto a nut (1), fitted with a sleeve (2), and has a tapered head (3) on its lower end. The spring washer (4) and the flat washer (5) are both fitted onto the circumference of the screw (6).

3. An adjustable expansion anchor bolt according to claim 2, characterized in that, The connecting seat (7) includes a screw cylinder (23), the upper end of the screw (6) is threaded in the screw cylinder (23), the upper end face of the screw cylinder (23) is provided with a cylinder (24), the pressure-bearing component (16) is slidably fitted in the cylinder (24), and the lower part of the L-shaped steering block (8) is rotatably fitted on the circumference of the cylinder (24).

4. An adjustable expansion anchor bolt according to claim 3, characterized in that, The pressure-bearing component (16) includes a circular plate (27) and two guide blocks (26). The guide blocks (26) are located on the side of the circular plate (27). The circular plate (27) is slidably fitted inside the cylinder (24). The inner wall of the cylinder (24) is provided with two guide grooves (22). The guide blocks (26) are slidably fitted in the corresponding guide grooves (22).

5. An adjustable expansion anchor bolt according to claim 4, characterized in that, A ring is installed around the slot (19), and a rotating groove corresponding to the ring is provided around the cylinder (24), and the ring rotates and fits in the rotating groove.

6. An adjustable expansion anchor bolt according to claim 5, characterized in that, The adjustment assembly includes a stud (9) threaded into a screw hole (25), the stud (9) having a square groove (13) vertically, and an adjustment element being provided in the square groove (13).

7. An adjustable expansion anchor bolt according to claim 6, characterized in that, The adjusting component includes a screw (11) and two sliders. The two sliders are slidably fitted on both sides of the square groove (13). A square post (10) is installed between the two sliders. A bolt (12) is provided on the square post (10). The end face of the stud (9) away from the L-shaped steering block (8) is provided with a slot. One end of the screw (11) passes through the slot laterally and is threaded onto one side of the square post (10).

8. An adjustable expansion anchor bolt according to claim 7, characterized in that, The square groove (13) has sliding grooves (14) on both sides, and a row of rectangular grooves (15) is provided on the lower side of the sliding grooves (14). The slider is engaged in the corresponding rectangular groove (15).

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