Double-lock expanded-base mechanical anchor bolt and using tool thereof
By adopting a double locking expansion structure and circular nut design in mechanical anchor bolts, the problem of loosening caused by the lack of internal locking mechanism in traditional anchor bolts is solved, achieving higher stability and safety.
Patent Information
- Application Number
- CN202421071797.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-16
AI Technical Summary
Traditional mechanical anchor bolts lack an internal locking mechanism, which leads to loosening easily under the action of external forces, affecting structural safety, and in the case of poor concrete hole walls, the anchoring effect is poor.
Double lock expansion mechanical anchor bolts are used, including screws, expansion tubes, flat bottom gaskets, open spacers, square nuts and round nuts. Through the cooperation of the circular nut and the screw, the expanded expansion tube is tightened to achieve double lock fixation and ensure the stability of the anchor bolt.
It improves the stability and safety of anchor bolts, prevents loosening accidents, enhances the effectiveness of anchoring, and is suitable for multi-angle and multi-directional safety dimension environments.
Smart Images
Figure CN222526670U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of engineering construction, and in particular to a double-locking, bottom-expanded mechanical anchor bolt and a tool for using the same. Background Art
[0002] In modern construction projects, especially in underground projects such as tunnels and subways, as well as the installation of public facilities such as bus stops, safety and stability are crucial. The traditional method of installing mechanical anchor bolts is to screw them directly into the concrete hole, which has inherent defects. The anchoring effect of this method depends largely on the quality of the concrete hole wall. Once the hole wall is rough or the hole diameter is inaccurate, the anchor bolt may not be firmly fixed.
[0003] Since traditional self-cutting mechanical anchor bolts often lack an internal locking mechanism, they rely solely on the friction between the external thread and the hole wall to maintain stability. In the absence of sufficient lateral pressure, such as when encountering external forces such as earthquakes, strong winds, and snow loads, the anchor bolts may loosen due to uneven force, seriously affecting the safety of the structure. In addition, if the concrete hole diameter is too large or the hole wall is damaged, the nut cannot be screwed in, reducing the effectiveness of the anchor and greatly compromising the reliability of the fixing equipment. Utility Model Content
[0004] To this end, the present application provides a double-locking, bottom-expanded mechanical anchor bolt and a tool for using the same to solve the problem in the prior art that the anchor bolt lacks an internal locking mechanism and is prone to loosening.
[0005] In order to achieve the above objectives, this application provides the following technical solutions:
[0006] A double-lock expanded bottom mechanical anchor bolt comprises a screw rod, an expanded bottom tube, a flat bottom gasket, an open gasket and a square nut, wherein the expanded bottom tube, the flat bottom gasket and the open gasket can all be sleeved outside the screw rod, and the square nut can be threadedly fitted on the screw rod, and the expanded bottom tube comprises a tube body and a plurality of expansion plates connected to one end of the tube body, and the expansion plates can expand outward; it also comprises a circular nut, which is a cylindrical tube with an internal thread, and the outer diameter of the circular nut is not greater than the outer diameter of the tube body of the expanded bottom tube, and the circular nut is coaxially arranged with the screw rod; the internal thread of the circular nut matches with the screw rod.
[0007] Optionally, a side surface of the circular nut facing the bottom expansion tube is in contact with a side surface of the tube body facing away from the expansion sheet.
[0008] Optionally, an alignment groove is provided on the end surface of the circular nut facing away from the bottom expansion tube, and the alignment groove is provided along the axial direction of the circular nut.
[0009] Further optionally, a plurality of alignment grooves are provided at intervals along the circumference of the circular nut.
[0010] Further optionally, the alignment groove is a square alignment groove.
[0011] A tool includes a connecting tube for inserting a screw rod, wherein the outer diameter of the connecting tube is not greater than the outer diameter of a bottom expansion tube; one end of the connecting tube is provided with an alignment block protruding outwardly along the axial direction, and the alignment block cooperates with an alignment groove.
[0012] Optionally, a plurality of alignment blocks are provided on the connecting tube, and the positions and quantities of the alignment grooves and the alignment blocks correspond to each other.
[0013] Optionally, the shape of the alignment block matches the shape of the alignment groove.
[0014] Optionally, an operating handle is fixed to one end of the connecting tube away from the alignment block, and the operating handle is in the shape of a rectangular strip.
[0015] Further optionally, a slot is provided on the operating handle.
[0016] Compared with the prior art, this application has at least the following beneficial effects:
[0017] 1. During the construction process, the circular nut is screwed onto the screw to tighten the expanded bottom tube, so that its position on the screw is fixed and cannot be loosened. Setting the circular nut as a cylindrical structure makes it easier for the bottom tube to enter the concrete hole when the concrete hole is too deep and the bottom tube goes deep into the hole. It is also easier to press and fix the bottom tube so that it enters a tightened state in advance, thereby improving the stability of the subsequent installation structure. The construction and installation process is fast and safe, more in line with the safety of the construction site, and more in line with the stability and safety before large-scale lifting, to achieve a multi-angle and multi-directional safety dimension environment, and solve the problems of looseness, uncertainty and inaccurate positioning before the installation of large equipment.
[0018] 2. The round nut fits against the side of the expanded bottom tube, making it easier for the round nut to tighten the expanded bottom tube.
[0019] 3. By providing the alignment groove, it is easier to tighten the round nut using a tool provided with an alignment block.
[0020] 4. The design of multiple alignment grooves can prevent the tool from slipping and improve the reliability of the tightening operation.
[0021] 5. The setting of the operating handle makes it easier to use rotating tools to assist in driving the round nut to rotate, making the operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more intuitively illustrate the prior art and the present application, exemplary drawings are given below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing the present application; for example, those skilled in the art are capable of easily making conventional adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, dimensional ratios, etc. of certain units (components) based on the technical concepts and exemplary drawings disclosed in the present application.
[0023] Figure 1 A schematic diagram of the overall structure of a double-locking, bottom-enlarged mechanical anchor bolt provided in Example 1 of the present application;
[0024] Figure 2 for Figure 1 Schematic diagram of the structure of the round nut;
[0025] Figure 3 This is a schematic diagram of the overall structure of a tool provided in Example 2 of the present application.
[0026] Description of reference numerals:
[0027] 1. Screw; 2. Expanded bottom tube; 21. Tube body; 22. Expansion sheet; 3. Flat-bottom gasket; 4. Open gasket; 5. Square nut; 6. Conical block; 7. Round nut; 8. Alignment groove; 9. Connecting tube; 10. Alignment block; 11. Operating handle; 12. Slot. DETAILED DESCRIPTION
[0028] The present application is further described below in detail through specific embodiments in conjunction with the accompanying drawings.
[0029] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to, and do not have special meanings in terms of technical connotations (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).
[0030] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this application are usually used to indicate the general relative position relationship for the purpose of intuitive understanding by referring to the drawings, and are not absolute limitations on the position relationship in the actual product.
[0031] Embodiment 1
[0032] A double-locking, bottom-expanded mechanical anchor bolt, mainly used in tunnel construction, high-speed rail construction, nuclear power engineering installation, photovoltaic engineering installation, wind power installation, civil engineering construction and building curtain walls, etc. Figure 1 and Figure 2 , including a screw 1, a bottom expansion tube 2, a flat-bottom gasket 3, an open gasket 4 and a square nut 5. A conical block 6 is provided at one end of the screw 1, and the diameter of the conical block 6 increases as it extends outward. The bottom expansion tube 2, the flat-bottom gasket 3 and the open gasket 4 can all be sleeved outside the screw 1 and can slide freely along the axial direction of the screw 1. The square nut 5 can be threadedly fitted on the screw 1. The bottom expansion tube 2 includes a tube body 21 and a plurality of expansion sheets 22 connected to one end of the tube body 21, and the expansion sheets 22 can expand outward along the conical block 6.
[0033] The double-lock bottom-enlarged mechanical anchor bolt also includes a circular nut 7, which is a cylindrical tube with an internal thread, and the outer diameter of the circular nut 7 is not greater than the outer diameter of the tube body of the bottom-enlarged tube 2, so that the circular nut 7 can smoothly enter the concrete hole. In this embodiment, the outer diameter of the circular nut 7 is set to be equal to the outer diameter of the tube body of the bottom-enlarged tube 2. The axis of the internal thread hole and the axis of the circular nut 7 are on the same line, so that the circular nut 7 can be coaxially arranged with the screw rod 1 after installation. Among them, the internal thread of the circular nut 7 matches the screw rod 1.
[0034] During the construction process, first make a concrete hole, and then drive the end of the screw 1 with the conical block 6 into the concrete hole. Then, put the end of the bottom expansion tube 2 with the expansion sheet 22 inwardly on the screw 1 until the expansion sheet 22 is against the conical block 6, and then use the tool to push the bottom expansion tube 2 inward to expand the expansion sheet 22 outward along the conical surface of the conical block 6, and fix the bottom expansion tube 2 on the screw 1 with the pressure between the expansion sheet 22 and the concrete hole wall. Then screw the round nut 7 onto the screw 1 and make it press against the bottom expansion tube 2 to further press and fix the bottom expansion tube 2. Finally, screw the steel parts to be installed onto the screw 1, and put on the flat-bottom gasket 3 and the open gasket 4 in turn, and screw on the square nut 5 to fix the steel parts.
[0035] Therefore, the circular nut 7 exerts a pressing effect on the bottom-enlarged tube 2, thereby preventing the bottom-enlarged tube 2 from loosening and causing safety accidents, thereby greatly improving the safety of the building.
[0036] To improve the reliability of the circular nut 7 pressing against the expanded bottom tube 2, the circular nut 7 is arranged to be in contact with the surface of the expanded bottom tube 2 and the surface of the tube body away from the expansion sheet 22. In this embodiment, the side surfaces of the circular nut 7 and the tube body opposite to each other are both arranged to be flat so as to be completely in contact.
[0037] Furthermore, in order to facilitate the rotation of the circular nut 7 with the aid of a tool, an alignment groove 8 is provided on the end surface of the circular nut 7 on one side away from the bottom expansion tube 2, and the alignment groove 8 is provided along the axial direction of the circular nut 7. In order to improve the reliability of the cooperation between the tool and the circular nut 7, a plurality of alignment grooves 8 are evenly spaced along the circumference of the circular nut 7.
[0038] Embodiment 2
[0039] A tool suitable for use with the double-lock bottom-enlarged mechanical anchor bolt in the first embodiment, referring to Figure 1 and Figure 3 , including a connecting pipe 9 for the screw rod 1 to be inserted. The outer diameter of the connecting pipe 9 is not greater than the outer diameter of the bottom expansion pipe 2, so that it can smoothly enter the concrete hole. In this embodiment, the outer diameter of the connecting pipe 9 is set to be equal to the outer diameter of the circular nut 7 and the bottom expansion pipe 2.
[0040] Corresponding to the circular nut 7 of the embodiment, a plurality of alignment blocks 10 protrude outward along the axial direction at one end of the connecting tube 9, the positions and quantities of the alignment blocks 10 and the alignment grooves 8 correspond one to one, and the alignment blocks 10 and the alignment grooves 8 cooperate with each other.
[0041] Furthermore, the alignment groove 8 and the alignment block 10 are configured as square structures with matching shapes to enhance the matching stability between the two.
[0042] In order to make it more convenient to use, an operating handle 11 is fixed to one end of the connecting tube 9 away from the alignment block 10. The operating handle 11 adopts a rectangular strip structure, which is easier to grasp and prevents slipping during manual operation.
[0043] Furthermore, a clamping groove 12 is provided on the operating handle 11 to facilitate clamping with a rotating tool when the connecting tube 9 is driven to rotate by a rotating external tool.
[0044] During operation, it is only necessary to engage the alignment block 10 with the alignment groove 8, and then use the tool to drive the circular nut 7 to rotate. When the concrete hole is too deep, the tool can also be inserted into the concrete hole to continue to drive the circular nut 7 to rotate.
[0045] In actual use, the double-locking bottom-expanding mechanical anchor bolt in the first embodiment is used in conjunction with the tool in the second embodiment. The specifications of the parts of the two are not fixed and can be adjusted according to the working conditions and the size of the workpiece to be installed.
[0046] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.
Claims
1. A double-lock bottom-expanded mechanical anchor bolt, comprising a screw (1), a bottom-expanded tube (2), a flat-bottomed gasket (3), an open gasket (4) and a square nut (5), wherein the bottom-expanded tube (2), the flat-bottomed gasket (3) and the open gasket (4) can be sleeved outside the screw (1), the square nut (5) can be threadedly fitted on the screw (1), the bottom-expanded tube (2) comprises a tube body (21) and a plurality of expansion sheets (22) connected to one end of the tube body (21), and the expansion sheets (22) can expand outwards; characterized in that: The invention also comprises a circular nut (7), which is a cylindrical tube with an internal thread, and the outer diameter of the circular nut (7) is not greater than the outer diameter of the tube body of the bottom expansion tube (2), and the circular nut (7) is coaxially arranged with the screw rod (1); the internal thread of the circular nut (7) matches with the screw rod (1).
2. The double-locking bottom-expanding mechanical anchor bolt according to claim 1, characterized in that: The side surface of the circular nut (7) facing the bottom expansion tube (2) is in contact with the side surface of the tube body facing away from the expansion sheet (22).
3. The double-locking bottom-expanding mechanical anchor bolt according to claim 1, characterized in that: An alignment groove (8) is provided on the end surface of the circular nut (7) facing away from the bottom expansion tube (2), and the alignment groove (8) is provided along the axial direction of the circular nut (7).
4. The double-locking bottom-expanding mechanical anchor bolt according to claim 3, characterized in that: A plurality of alignment grooves (8) are arranged at intervals along the circumference of the circular nut (7).
5. The double-locking bottom-expanding mechanical anchor bolt according to claim 4, characterized in that: The alignment groove (8) is a square alignment groove (8).
6. A tool for use, suitable for the double-locking bottom-enlarged mechanical anchor bolt according to claim 5, characterized in that: It comprises a connecting tube (9) for inserting a screw rod (1), wherein the outer diameter of the connecting tube (9) is not greater than the outer diameter of the bottom expansion tube (2); one end of the connecting tube (9) protrudes outwardly along the axial direction with an alignment block (10), and the alignment block (10) cooperates with the alignment groove (8).
7. The tool according to claim 6, characterized in that: A plurality of alignment blocks (10) are provided on the connecting pipe (9), and the positions and quantities of the alignment grooves (8) and the alignment blocks (10) correspond to each other.
8. The tool according to claim 6, characterized in that: The shape of the alignment block (10) matches the shape of the alignment groove (8).
9. The tool according to claim 6, characterized in that: An operating handle (11) is fixed to one end of the connecting pipe (9) away from the alignment block (10), and the operating handle (11) is in the shape of a rectangular strip.
10. The tool according to claim 9, characterized in that: The operating handle (11) is provided with a card slot (12).