Self-adaptive variable-diameter steel bar sleeve spring pre-tightening mechanism

Abstract

The utility model relates to the technical field of steel bar sleeves. The utility model discloses a self-adaptive reducing steel bar sleeve spring pre-tightening mechanism which comprises a reducing sleeve, the inner side of the reducing sleeve is rotatably connected with a pre-tightening assembly, the outer side of the reducing sleeve is fixedly connected with a limiting assembly, the pre-tightening assembly further comprises a rotating ring, the outer side of the rotating ring is fixedly connected with an extension spring, and the outer side of the extension spring is fixedly connected with a limiting assembly. According to the mechanism, the pre-tightening assembly is arranged, the pre-tightening sleeve is rotated, a threaded groove in the inner side of the pre-tightening sleeve is meshed with a thread on the outer side of a steel bar, the pre-tightening sleeve gradually slides out of the variable-diameter sleeve in the rotating process, and at the moment, the extension spring is in a stretched state; when the steel bar is pre-tightened, a tensile force close to the variable-diameter sleeve is applied to the pre-tightening sleeve, so that the steel bar is pre-tightened preliminarily, the steel bar and the variable-diameter sleeve are connected more tightly, the position of the steel bar is fixed preliminarily, and the steel bar is prevented from being loosened easily in the subsequent construction or use process.

Description

An adaptive variable diameter rebar sleeve spring preload mechanism Technical Field

[0001] This utility model relates to the field of rebar sleeve technology, specifically to an adaptive variable diameter rebar sleeve spring pretensioning mechanism. Background Technology

[0002] In the field of building construction, rebar connection is one of the key aspects of constructing a stable building structure. Rebar sleeve connection, as a commonly used rebar connection method, has been widely applied in practical engineering projects.

[0003] In the existing technology, during the process of connecting steel bars with sleeves, the pre-tightening force of the sleeves on the steel bars is often insufficient. When subjected to external forces, components such as the pre-tightening sleeve are prone to displacement, which leads to the loss of pre-tightening force and makes it impossible to firmly connect the steel bars and sleeves. This results in the steel bars being prone to loosening during subsequent construction or use, and the firmness and stability of the steel bar connection cannot be guaranteed. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides an adaptive variable diameter rebar sleeve spring pre-tightening mechanism, which solves the problem that components such as the pre-tightening sleeve are prone to displacement during the rebar sleeve connection process, resulting in loss of pre-tightening force and failure to securely connect the rebar and the sleeve.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: an adaptive variable diameter rebar sleeve spring pre-tightening mechanism, comprising a variable diameter sleeve, a pre-tightening component rotatably connected to the inner side of the variable diameter sleeve, and a limit component fixedly connected to the outer side of the variable diameter sleeve, further comprising: the pre-tightening component comprising a rotating ring, a tension spring fixedly connected to the outer side of the rotating ring, a pre-tightening sleeve fixedly connected to the side of the tension spring away from the rotating ring, and a limit rod slidably connected to the inner wall of the pre-tightening sleeve, the pre-tightening component achieving preliminary pre-tightening of the rebar, making the connection between the rebar and the variable diameter sleeve tighter;

[0008] The limiting assembly includes a fixing collar, a rotating ring rotatably connected to the outer side of the fixing collar, a magnet fixedly connected to the outer side of the rotating ring, a compression spring fixedly connected to the inner side of the fixing collar, a metal block fixedly connected to the outer side of the compression spring, a plug rod fixedly connected to the side of the metal block away from the compression spring, and a magnetic block fixedly connected to the inner side of the fixing collar. The limiting assembly can ensure the stability of the pre-tightening sleeve position, maintain the pre-tightening force on the reinforcing bar, and ensure the firmness and stability of the reinforcing bar connection.

[0009] Preferably, the outer side of the rotating ring is rotatably connected to the inner side of the variable diameter sleeve, and the inner side of the variable diameter sleeve is slidably connected to the outer wall of the pre-tightening sleeve. During the rotation, the pre-tightening sleeve gradually slides out from the variable diameter sleeve. At this time, the tension spring is in a stretched state, and a pulling force is applied to the pre-tightening sleeve in the direction close to the variable diameter sleeve to achieve the initial pre-tightening of the reinforcing bar.

[0010] Preferably, the limiting rods are arranged in a ring along the inner wall of the rotating ring, and the outer wall of the limiting rods is slidably connected to the inner wall of the pre-tightening sleeve. When the pre-tightening sleeve is rotated, the pre-tightening sleeve drives the rotating ring to rotate together through the limiting rods.

[0011] Preferably, the inner side of the fixed collar is fixedly connected to the outer wall of the variable diameter sleeve, and the outer side of the insertion rod is slidably connected to the inner wall of the fixed collar. When it is necessary to restrict the rotation of the rotating ring, the rotating ring is rotated along the outer side of the fixed collar so that the position of the magnet and the magnetic block corresponds, and the position of the rotating ring can be restricted.

[0012] Preferably, the compression spring and the magnetic block are arranged in a ring along the inner wall of the fixed collar, and the compression spring and the magnetic block are staggered. The positions of the magnet and the metal block correspond to each other. At this time, under the action of magnetic attraction, the metal block drives the insertion rod to slide towards the side closer to the magnet, and forces the compression spring to be compressed. At this time, the insertion rod is dislodged from the limiting hole to avoid interfering with the rotation of the rotating ring.

[0013] Preferably, the outer wall of the insertion rod is slidably connected to the inner wall of the variable diameter sleeve through the insertion hole, and the insertion hole is opened in the wall of the variable diameter sleeve. The outer wall of the insertion rod is inserted into the side wall of the rotating ring through the limiting hole, and the limiting hole is opened in the wall of the rotating ring. The positions of the magnet and the magnetic block are corresponding. At this time, the reset compression spring causes the insertion rod to slide in the insertion hole and finally insert into the limiting hole, thereby ensuring the stability of the pre-tightening sleeve position.

[0014] (III) Beneficial Effects

[0015] This utility model provides an adaptive variable diameter rebar sleeve spring preload mechanism. It has the following beneficial effects:

[0016] (i) This mechanism is equipped with a pre-tightening component. When the pre-tightening sleeve is rotated, the threaded groove on the inner side of the pre-tightening sleeve engages with the threaded groove on the outer side of the reinforcing bar. During the rotation, the pre-tightening sleeve gradually slides out of the reducing sleeve. At this time, the tension spring is in a stretched state, applying a pulling force to the pre-tightening sleeve towards the reducing sleeve, thereby achieving the initial pre-tightening of the reinforcing bar, making the connection between the reinforcing bar and the reducing sleeve tighter, and initially fixing the position of the reinforcing bar, preventing the reinforcing bar from easily loosening during subsequent construction or use.

[0017] (II) By setting a limiting component, when the position of the magnet in the limiting component corresponds to that of the metal block, the insertion rod is dislodged from the limiting hole under the action of magnetic attraction, avoiding interference with the rotation of the rotating ring. The rotating ring rotates along the outside of the fixed collar, and when the position of the magnet corresponds to that of the magnetic block, the reset compression spring causes the insertion rod to slide in the insertion hole and finally insert into the limiting hole, thereby ensuring the stability of the pre-tightening sleeve position, maintaining the pre-tightening force on the reinforcing bar, and ensuring the firmness and stability of the reinforcing bar connection. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 is a schematic diagram of the internal structure of this utility model;

[0020] Figure 3 is a structural schematic diagram of the pre-tightening component of this utility model;

[0021] Figure 4 is a structural schematic diagram of the limiting component of this utility model;

[0022] Figure 5 is a structural schematic diagram of the variable diameter sleeve of this utility model.

[0023] In the diagram: 1. Variable diameter sleeve; 2. Limiting assembly; 3. Pre-tightening assembly; 4. Insertion hole; 31. Rotating ring; 32. Tension spring; 33. Pre-tightening sleeve; 34. Limiting rod; 35. Limiting hole; 21. Fixed collar; 22. Rotating ring; 23. Magnet; 24. Compression spring; 25. Metal block; 26. Insertion rod; 27. Magnetic block. Detailed Implementation

[0024] 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.

[0025] Example: Please refer to Figures 1-5. This utility model provides a technical solution: an adaptive variable diameter rebar sleeve spring pre-tightening mechanism, including a variable diameter sleeve 1, a pre-tightening component 3 rotatably connected to the inner side of the variable diameter sleeve 1, and a limit component 2 fixedly connected to the outer side of the variable diameter sleeve 1. Since the inner sides of both ends of the variable diameter sleeve 1 are provided with threaded grooves of different diameters, the appropriate threaded groove at one end can be selected for connection according to the diameter of the rebar to be connected. First, one end of the rebar to be connected is screwed into the appropriate threaded groove at one end of the variable diameter sleeve 1, and then the pre-tightening component 3 can be operated to pre-tighten. The mechanism also includes:

[0026] The pre-tightening assembly 3 includes a rotating ring 31. A tension spring 32 is fixedly connected to the outer side of the rotating ring 31. A pre-tightening sleeve 33 is fixedly connected to the side of the tension spring 32 away from the rotating ring 31. A limit rod 34 is slidably connected to the inner wall of the pre-tightening sleeve 33. The outer side of the rotating ring 31 is rotatably connected to the inner side of the reducing sleeve 1. The inner side of the reducing sleeve 1 is slidably connected to the outer wall of the pre-tightening sleeve 33. The limit rod 34 is arranged in a ring along the inner wall of the rotating ring 31. The outer wall of the limit rod 34 is slidably connected to the inner wall of the pre-tightening sleeve 33. When the pre-tightening sleeve 33 is rotated, it is driven by the limit rod 34. The rotating ring 31 rotates together with the tension spring 32, which rotates synchronously with the rotating ring 31 and the pre-tightening sleeve 33. During this process, the threaded groove on the inner side of the pre-tightening sleeve 33 engages with the threaded groove on the outer side of the reinforcing bar. As the pre-tightening sleeve 33 rotates, it gradually slides out of the reducing sleeve 1. At this time, the tension spring 32 is in a stretched state, applying a pulling force to the pre-tightening sleeve 33 towards the reducing sleeve 1, thereby achieving preliminary pre-tightening of the reinforcing bar, making the connection between the reinforcing bar and the reducing sleeve 1 tighter, and initially fixing the position of the reinforcing bar to prevent it from easily loosening during subsequent construction or use.

[0027] The limiting assembly 2 includes a fixed collar 21, a rotating ring 22 rotatably connected to the outer side of the fixed collar 21, a magnet 23 fixedly connected to the outer side of the rotating ring 22, a compression spring 24 fixedly connected to the inner side of the fixed collar 21, a metal block 25 fixedly connected to the outer side of the compression spring 24, an insertion rod 26 fixedly connected to the side of the metal block 25 away from the compression spring 24, a magnetic block 27 fixedly connected to the inner side of the fixed collar 21, the inner side of the fixed collar 21 fixedly connected to the outer wall of the variable diameter sleeve 1, and the outer side of the insertion rod 26 slidably connected to the inner wall of the fixed collar 21. The compression spring 24 and the magnetic block 27 are both arranged in a ring along the inner wall of the fixed collar 21, and the compression spring 24 and the magnetic block 27 are arranged alternately. The outer wall of the insertion rod 26 is slidably connected to the inner wall of the variable diameter sleeve 1 through an insertion hole 4, and the insertion hole 4 is opened in the wall of the variable diameter sleeve 1. The positioning hole 35 is inserted into the side wall of the rotating ring 31, and the limiting hole 35 is opened in the wall of the rotating ring 31. The position of the magnet 23 in the limiting component 2 corresponds to the position of the metal block 25. At this time, under the action of magnetic attraction, the metal block 25 drives the insertion rod 26 to slide towards the side closer to the magnet 23, and forces the compression spring 24 to be compressed. At this time, the insertion rod 26 is dislodged from the limiting hole 35 to avoid interfering with the rotation of the rotating ring 31. When it is necessary to limit the rotation of the rotating ring 31, the rotating ring 22 is rotated along the outside of the fixed collar 21 so that the position of the magnet 23 corresponds to the position of the magnetic block 27. At this time, the position of the rotating ring 22 can be limited. The reset compression spring 24 causes the insertion rod 26 to slide in the insertion hole 4 and finally insert into the limiting hole 35, thereby ensuring the stability of the position of the pre-tightening sleeve 33, maintaining the pre-tightening force on the reinforcing bar, and ensuring the firmness and stability of the reinforcing bar connection.

[0028] Working principle: During use, since the inner sides of both ends of the reducing sleeve 1 have threaded grooves of different diameters, the appropriate threaded groove at one end can be selected for connection according to the diameter of the reinforcing bar to be connected. First, screw one end of the reinforcing bar to be connected into the appropriate threaded groove at one end of the reducing sleeve 1, and then operate the pre-tightening component 3 to pre-tighten:

[0029] Rotate the pre-tightening sleeve 33. At this time, the pre-tightening sleeve 33 drives the rotating ring 31 to rotate together through the limiting rod 34. The tension spring 32 rotates synchronously with the rotation of the rotating ring 31 and the pre-tightening sleeve 33. During this process, the threaded groove on the inner side of the pre-tightening sleeve 33 engages with the thread on the outer side of the reinforcing bar. As the pre-tightening sleeve 33 rotates, it gradually slides out from the reducing sleeve 1. At this time, the tension spring 32 is in a stretched state, applying a pulling force to the pre-tightening sleeve 33 towards the reducing sleeve 1, thereby achieving the initial pre-tightening of the reinforcing bar, making the connection between the reinforcing bar and the reducing sleeve 1 tighter, and initially fixing the position of the reinforcing bar to prevent it from easily loosening during subsequent construction or use.

[0030] During this process, the magnet 23 in the limiting component 2 corresponds to the position of the metal block 25. At this time, under the action of magnetic attraction, the metal block 25 drives the insertion rod 26 to slide towards the side closer to the magnet 23, and forces the compression spring 24 to be compressed. At this time, the insertion rod 26 is dislodged from the limiting hole 35 to avoid interfering with the rotation of the rotating ring 31. When it is necessary to limit the rotation of the rotating ring 31, the rotating ring 22 is rotated along the outside of the fixed collar 21 so that the position of the magnet 23 corresponds to the position of the magnetic block 27. At this time, the position of the rotating ring 22 can be limited. The reset compression spring 24 causes the insertion rod 26 to slide in the insertion hole 4 and finally insert into the limiting hole 35, thereby ensuring the stability of the position of the pre-tightening sleeve 33, maintaining the pre-tightening force on the reinforcing bar, and ensuring the firmness and stability of the reinforcing bar connection.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adaptive variable diameter rebar sleeve spring pre-tightening mechanism, comprising a variable diameter sleeve (1), wherein a pre-tightening assembly (3) is rotatably connected to the inner side of the variable diameter sleeve (1), and a limit assembly (2) is fixedly connected to the outer side of the variable diameter sleeve (1), characterized in that, Also includes: The pre-tightening assembly (3) includes a rotating ring (31), a tension spring (32) is fixedly connected to the outer side of the rotating ring (31), a pre-tightening sleeve (33) is fixedly connected to the side of the tension spring (32) away from the rotating ring (31), and a limit rod (34) is slidably connected to the inner wall of the pre-tightening sleeve (33); the limiting assembly (2) includes a fixed collar (21), a rotating ring (22) is rotatably connected to the outer side of the fixed collar (21), a magnet (23) is fixedly connected to the outer side of the rotating ring (22), a compression spring (24) is fixedly connected to the inner side of the fixed collar (21), a metal block (25) is fixedly connected to the outer side of the compression spring (24), an insertion rod (26) is fixedly connected to the side of the metal block (25) away from the compression spring (24), and a magnetic block (27) is fixedly connected to the inner side of the fixed collar (21).

2. The adaptive variable diameter rebar sleeve spring preload mechanism according to claim 1, characterized in that: The outer side of the rotating ring (31) is rotatably connected to the inner side of the variable diameter sleeve (1), and the inner side of the variable diameter sleeve (1) is slidably connected to the outer wall of the pre-tightening sleeve (33).

3. The adaptive variable diameter rebar sleeve spring preload mechanism according to claim 1, characterized in that: The limiting rod (34) is arranged in a ring along the inner wall of the rotating ring (31), and the outer wall of the limiting rod (34) is slidably connected to the inner wall of the pre-tightening sleeve (33).

4. The adaptive variable diameter rebar sleeve spring pre-tightening mechanism according to claim 1, characterized in that: The inner side of the fixed collar (21) is fixedly connected to the outer wall of the variable diameter sleeve (1), and the outer side of the insertion rod (26) is slidably connected to the inner wall of the fixed collar (21).

5. The adaptive variable diameter rebar sleeve spring preload mechanism according to claim 1, characterized in that: The compression spring (24) and the magnetic block (27) are arranged in a ring along the inner wall of the fixing collar (21), and the compression spring (24) and the magnetic block (27) are arranged alternately.

6. The adaptive variable diameter rebar sleeve spring preload mechanism according to claim 1, characterized in that: The outer wall of the insertion rod (26) is slidably connected to the inner wall of the variable diameter sleeve (1) through the insertion hole (4), and the insertion hole (4) is opened in the wall of the variable diameter sleeve (1). The outer wall of the insertion rod (26) is inserted into the side wall of the rotating ring (31) through the limiting hole (35), and the limiting hole (35) is opened in the wall of the rotating ring (31).

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