A bottom-enlarged mechanical anchor bolt
By designing a mechanical anchor bolt with a bottom expansion including screws, inverted cone expansion heads, expansion sheets and other components, the problem of stress concentration in traditional anchor bolts in concrete structures is solved, and a more stable and safe mounting effect is achieved.
Patent Information
- Application Number
- CN202421662754.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-07-12
AI Technical Summary
Traditional mechanical anchor bolts are prone to stress concentration when drilling holes in concrete structures, resulting in unstable insertion strength and insufficient safety.
A mechanical anchor bolt with a screw, an inverted cone expansion head, an expansion piece, a clamp ring and a wedge-like sleeve are designed. The first and second stages of mounting are formed by tightening the nut to increase stability, and the support is formed by folding the fixed connecting shaft to enhance the tensile strength.
It effectively reduces stress concentration, improves clamping strength and safety, has a wide range of application, and is suitable for installation of different buried plate lengths.
Smart Images
Figure CN222717243U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building construction, and more specifically, to a bottom-enlarged mechanical anchor bolt. Background Art
[0002] During the construction process, post-embedded parts for curtain wall decoration are widely used, and mechanical anchor bolts are beginning to be favored due to their better stress-bearing effect. Traditional bottom-expanded mechanical anchor bolts use the dislocation of the bottom expansion piece and the bolt to expand the expansion piece and fit into the concrete, forming a lock-key effect. In the actual operation process, due to the presence of steel bars in the concrete structure, there is a thin layer of concrete between the hole wall or the original structural steel bars during drilling. After the bolt is driven in, it is easy to crack, causing stress concentration in some places between the bolt and the concrete, affecting its stress and forming hidden dangers. In addition, the bolt length is fixed, and the exposed length of the screw rod cannot be adjusted. After the nut is put on after the embedded plate, the exposed complete thread of the screw rod does not meet the requirements, the embedding strength is unstable, and the safety is not strong enough. Utility Model Content
[0003] In order to overcome the deficiencies of the prior art, the utility model provides a bottom-enlarged mechanical anchor bolt, which has the advantage of being able to form a secondary embedding to increase stability.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bottom-expanded mechanical anchor bolt, comprising a screw rod, the lower end of the screw rod is meshed with an inverted cone-expanded bottom head, the outer side of the inverted cone-expanded bottom head is provided with a fixing groove, the inner side of the fixing groove is fixedly connected with a fixed connecting shaft, the upper end of the fixed connecting shaft is fixedly connected with an expansion plate, the upper end of the expansion plate is movably connected with a clamp ring, the lower end of the expansion plate is provided with an expansion gap second, the upper end of the expansion plate is provided with an expansion gap first, the upper end of the clamp ring is movably connected with a wedge-like sleeve, the upper end of the wedge-like sleeve is movably connected with a gasket, the upper end of the gasket is movably connected with a nut, and the bottom end of the screw rod is fixedly connected with a wire head.
[0005] As a preferred technical solution of the utility model, the screw rod is covered with threads throughout the body, and the expansion piece, the clamp ring-like wedge sleeve, the gasket and the nut are all engaged with the screw rod.
[0006] As a preferred technical solution of the utility model, the upper end and the lower end of the expansion piece are both in an outwardly curved shape.
[0007] As a preferred technical solution of the utility model, the first and second expansion gaps each have four evenly distributed at the upper and lower ends of the expansion piece, and the length of the second expansion gap is greater than the length of the first expansion gap.
[0008] As a preferred technical solution of the utility model, the upper end of the wedge-like sleeve is in the shape of a long cylinder, and the lower end of the wedge-like sleeve is in the shape of an inverted cone.
[0009] As a preferred technical solution of the utility model, the thread head is located on the lower end surface of the screw rod without threads.
[0010] As a preferred technical solution of the utility model, the fixed connection shaft is divided into two sections, the connection of which is connected by bolts, and the connection can be rotated and folded around the bolts.
[0011] As a preferred technical solution of the utility model, the upper and lower ends of the fixed connecting shaft are fixedly connected to the fixed circular shaft embedded in the expansion piece and the inverted cone expansion bottom head.
[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0013] 1. The utility model tightens the nut, and the second expansion gap at the lower end of the expansion piece expands under the conical guidance of the inverted cone bottom expansion head, forming a first-stage embedding. In the second stage, the nut is further tightened, and the wedge-like sleeve begins to push open the expansion gap at the upper end of the expansion piece and gradually enters between the expansion piece and the screw, forming a second-stage embedding. Compared with traditional bottom expansion bolts, it is safer.
[0014] 2. The utility model fixes and installs the connecting shaft inside the second expansion gap at the lower end of the expansion piece and at a position corresponding to the inverted cone expansion bottom head. When the lower end of the expansion piece expands during the process of tightening the nut, it folds together to form an embedded pillar to increase stability. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the structure of the utility model;
[0016] Figure 2 This is a schematic diagram of the blasting structure of the utility model;
[0017] Figure 3 This is a schematic diagram of the structural wire head of the utility model;
[0018] Figure 4 This is a schematic diagram of the expansion sheet structure of the utility model;
[0019] Figure 5 This is a schematic diagram of the fixed connecting shaft of the utility model structure.
[0020] In the figure: 1. screw; 2. expansion plate; 3. clamp ring; 4. wedge-like sleeve; 5. gasket; 6. nut; 7. inverted cone expanded bottom head; 8. fixing groove; 9. thread head; 10. fixed connecting shaft; 11. expansion gap one; 12. expansion gap two. 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] like Figures 1 to 5 As shown, the utility model provides a bottom-expanded mechanical anchor bolt, including a screw rod 1, the lower end of the screw rod 1 is meshed with an inverted cone-expanded bottom head 7, the outer side of the inverted cone-expanded bottom head 7 is provided with a fixing groove 8, the inner side of the fixing groove 8 is fixedly connected with a fixing connecting shaft 10, the upper end of the fixing connecting shaft 10 is fixedly connected with an expansion piece 2, the upper end of the expansion piece 2 is movably connected with a clamp ring 3, the lower end of the expansion piece 2 is provided with an expansion gap 2 12, the upper end of the expansion piece 2 is provided with an expansion gap 1 11, the upper end of the clamp ring 3 is movably connected with a wedge-like sleeve 4, the upper end of the wedge-like sleeve 4 is movably connected with a gasket 5, the upper end of the gasket 5 is movably connected with a nut 6, and the bottom end of the screw rod 1 is fixedly connected with a thread head 9.
[0023] During installation, the mechanical anchor bolt has high strength and its design structure makes it have high tensile strength and wide application range.
[0024] The screw rod 1 is covered with threads throughout its entire body, and the expansion piece 2, the clamp ring 3, the wedge sleeve 4, the gasket 5 and the nut 6 are all engaged with the screw rod 1.
[0025] As one body, it is easy to operate and the overall structure is more stable.
[0026] The upper end and the lower end of the expansion sheet 2 are both bent outward.
[0027] This is beneficial for the expansion sheet 2 to shrink and disperse the pressure when expanding the bottom anchor bolt.
[0028] There are four rupture gaps 11 and 12 evenly distributed at the upper and lower ends of the expansion piece 2 , and the length of the rupture gap 12 is greater than the length of the rupture gap 11 .
[0029] It is beneficial to complete the expansion of the expansion piece 2 outward when the screw 1 is rotated, and to expand the bottom to ensure that the pressure on the surface of the expansion piece 2 is balanced after the expansion piece 2 is contracted.
[0030] The upper end of the wedge-like sleeve 4 is in the shape of a long cylinder, and the lower end of the wedge-like sleeve 4 is in the shape of an inverted cone.
[0031] The shape of the lower end of the wedge-like sleeve 4 has good sealing performance, is easy to install, is conducive to the flow of liquid, has high corrosion resistance, and can withstand high pressure.
[0032] The thread head 9 is located on the lower end surface of the screw rod 1 and has no threads.
[0033] The exposed length of the screw rod 1 can be adjusted by rotating the screw head 9 and the inverted cone-shaped bottom head 7 at the tail end to the left and right.
[0034] The fixed connecting shaft 10 is divided into two sections, and the connection part thereof is connected by bolts, and the connection part can be rotated and folded around the bolts.
[0035] When the screw rod 1 is installed and then rotated, the distance between the expansion piece 2 and the inverted cone bottom expansion head 7 is shortened, and the fixed connecting shaft 10 is folded to form a blocking and reinforcing bottom expansion effect.
[0036] The upper and lower ends of the fixed connecting shaft 10 are fixedly connected to the fixed circular shaft embedded expansion piece 2 and the inverted cone bottom expansion head 7.
[0037] When the fixed connecting shaft 10 is damaged, it is convenient to replace and repair it and can be disassembled.
[0038] The working principle and use process of this utility model:
[0039] When it is needed to use, first punch holes at the desired practical position of the target object. After the punching is completed, the utility model can effectively reduce the influence of possible stress concentration when ordinary bottom-expanding bolts are embedded in a single area. First, the situation after the embedded plate is put on should be previewed. The exposed length of the screw 1 is adjusted by turning the thread head 9 of the screw 1 and the inverted cone bottom-expanding head 7 at the tail to the left and right to ensure that the exposed thread after the nut 6 is screwed on meets the specification requirements. When the bolt is installed, the nut 6 is first tightened in the first stage, and the expansion gap 12 at the lower end of the expansion piece 2 expands under the conical guidance of the inverted cone bottom-expanding head 7 to form a first-stage embedding. At the same time, because the distance between the expansion piece 2 and the inverted cone bottom-expanding head 7 is shortened, the fixed connecting shaft 10 is folded to form a bracket fixed between the expansion piece 2 and the inverted cone bottom-expanding head 7 to form a supporting effect. The nut 6 is tightened in the second stage, and the wedge-like sleeve 4 begins to push the expansion gap 11 at the upper end of the expansion piece 2 and gradually enters between the expansion piece 2 and the screw 1 to form a second-stage embedding. Compared with traditional bottom-expanding bolts, it is safer and more secure.
[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A bottom-enlarged mechanical anchor bolt, comprising a screw rod (1), characterized in that: The lower end of the screw rod (1) is meshed with an inverted cone expanded bottom head (7), the outer side of the inverted cone expanded bottom head (7) is provided with a fixing groove (8), the inner side of the fixing groove (8) is fixedly connected with a fixed connecting shaft (10), the upper end of the fixed connecting shaft (10) is fixedly connected with an expansion piece (2), the upper end of the expansion piece (2) is movably connected with a clamp ring (3), the lower end of the expansion piece (2) is provided with a second expansion gap (12), the upper end of the expansion piece (2) is provided with a first expansion gap (11), the upper end of the clamp ring (3) is movably connected with a wedge-like sleeve (4), the upper end of the wedge-like sleeve (4) is movably connected with a gasket (5), the upper end of the gasket (5) is movably connected with a nut (6), and the lower end of the screw rod (1) is fixedly connected with a thread head (9).
2. The bottom-enlarged mechanical anchor bolt according to claim 1, characterized in that: The screw rod (1) is covered with threads throughout its entire body, and the expansion piece (2), the clamp ring (3), the wedge sleeve (4), the gasket (5) and the nut (6) are all engaged with the screw rod (1).
3. The bottom-enlarged mechanical anchor bolt according to claim 1, characterized in that: The upper end and the lower end of the expansion sheet (2) are both in an outwardly curved shape.
4. The bottom-enlarged mechanical anchor bolt according to claim 1, characterized in that: The first rupture gap (11) and the second rupture gap (12) each have four evenly distributed at the upper and lower ends of the expansion piece (2), and the length of the second rupture gap (12) is greater than the length of the first rupture gap (11).
5. The bottom-enlarged mechanical anchor bolt according to claim 1, characterized in that: The upper end of the wedge-like sleeve (4) is in the shape of a long cylinder, and the lower end of the wedge-like sleeve (4) is in the shape of an inverted cone.
6. The bottom-enlarged mechanical anchor bolt according to claim 1, characterized in that: The thread head (9) is located on the lower end surface of the screw rod (1) and is not threaded.
7. The bottom-enlarged mechanical anchor bolt according to claim 1, characterized in that: The fixed connection shaft (10) is divided into two sections, the connection of which is connected by bolts, and the connection can be rotated and folded around the bolts.
8. The bottom-enlarged mechanical anchor bolt according to claim 1, characterized in that: The upper and lower ends of the fixed connection shaft (10) are fixedly connected to the fixed circular shaft embedded expansion piece (2) and the inverted cone expansion bottom head (7).