A reinforcing bar coupling device

Abstract

The application provides a reinforcing steel bar connecting device, which aims to solve the problem of how to improve the stability of the reinforcing steel bar connecting device and the reinforcing steel bar connection. The reinforcing steel bar connecting device comprises a clamping assembly and a pressure assembly connected with each other, the clamping assembly has a first end and a second end along the axial direction of the clamping assembly, the first end is the insertion end of the reinforcing steel bar, the pressure assembly is located on the side of the second end which is opposite to the first end, and the pressure assembly comprises a driving structure and a moving piece, and the driving structure can drive the moving piece to move towards the clamping assembly.

Description

Technical Field

[0001] This application relates to the field of rebar connection technology, and in particular to a rebar connection device. Background Technology

[0002] Buildings typically incorporate steel reinforcement bars to enhance their structural strength. To meet the requirements of different building structures, steel reinforcement bars are usually connected using a steel reinforcement connector.

[0003] In the prior art, to facilitate the connection of reinforcing bars, a reinforcing bar connection device equipped with a clamping component is used to connect the reinforcing bars. Specifically, the sleeve and the clamping component are engaged by an inclined plane. When the reinforcing bar is subjected to tensile force, the clamping component tightens the reinforcing bar under the action of the inclined plane, achieving self-locking.

[0004] However, due to structural defects in existing rebar connection devices, the clamping state of the rebars by the rebar connection devices is unstable. Summary of the Invention

[0005] The purpose of this application is to address the deficiencies in the aforementioned technology by providing a rebar connection device, aiming to solve the problem of how to improve the stability of the rebar connection device and the rebar connection.

[0006] This application provides a rebar connection device, which includes a clamping assembly and a pressure assembly connected together. Along the axial direction of the clamping assembly, the clamping assembly has a first end and a second end. The first end is the insertion end of the rebar. The pressure assembly is located on the side of the second end opposite to the first end. The pressure assembly includes a driving structure and a moving member. The driving structure is capable of driving the moving member to move toward the clamping assembly.

[0007] In the above scheme, the first end of the clamping assembly is provided with an insertion end, while the pressure assembly is located on the side of the second end of the clamping assembly opposite to the first end. In this way, after the reinforcing bar is inserted into the clamping assembly along the insertion end, when the driving structure drives the moving part to move towards the clamping assembly, the moving part can push the reinforcing bar, thereby increasing the preload between the reinforcing bar and the clamping assembly and improving the stability of the reinforcing bar clamping device.

[0008] Optionally, the pressure assembly further includes a cylinder, the movable member being slidably and sealingly connected to the inner bore of the cylinder, the movable member and the cylinder forming a pressure chamber; the cylinder is provided with a pressurization port, the pressurization port being used to inject a pressure medium into the pressure chamber to drive the movable member to move toward the clamping assembly.

[0009] Optionally, the clamping assembly includes a first clamping assembly and a second clamping assembly, and the pressure assembly includes a first moving member and a second moving member. The first clamping assembly and the second clamping assembly are connected to opposite ends of the pressure assembly. The driving structure can drive the first moving member to move toward the first clamping assembly and drive the second moving member to move toward the second clamping assembly.

[0010] Optionally, the pressure chamber is provided with a partition, and along the axial direction of the pressure chamber, the first moving member and the second moving member are respectively located on both sides of the partition, and the pressurization hole passes through the partition.

[0011] Optionally, the rebar connection device further includes a first cylinder and a second cylinder, the first cylinder having a first receiving cavity, the second cylinder having a second receiving cavity, the first clamping assembly being received in the first receiving cavity, and the second clamping assembly being received in the second receiving cavity; one end of the cylinder is connected to the first cylinder, and the other end is connected to the second cylinder.

[0012] Optionally, one end of the cylinder is provided with a first connecting part and the other end is provided with a second connecting part. Both the first connecting part and the second connecting part are provided with internal threads. The portion between the first connecting part and the second connecting part and the moving part forms a pressure chamber.

[0013] Optionally, the rebar connection device further includes a first partition, a second partition, a first elastic member, and a second elastic member. The first cylinder is provided with a third connecting portion, and the second cylinder is provided with a fourth connecting portion. The first partition is connected between the third connecting portion and the first connecting portion. One end of the first elastic member abuts against the first clamping assembly, and the other end abuts against the first partition. The second partition is connected between the second connecting portion and the fourth connecting portion. One end of the second elastic member abuts against the second clamping assembly, and the other end abuts against the second partition.

[0014] Optionally, one end of the cylinder is provided with a first connecting part and the other end is provided with a second connecting part, both the first connecting part and the second connecting part are provided with external threads; the steel bar connecting device further includes a first elastic element and a second elastic element, one end of the first elastic element abuts against the first clamping component and the other end abuts against the pressure component, one end of the second elastic element abuts against the second clamping component and the other end abuts against the pressure component.

[0015] Optionally, the pressure assembly further includes a first limiting member and a second limiting member, wherein the first limiting member is connected to one end of the cylinder body and the second limiting member is connected to the other end of the cylinder body; the first limiting member is used to limit the first moving member and the second limiting member is used to limit the second moving member.

[0016] Optionally, the rebar connection device further includes a support frame, which includes a base, a spacer, and a retaining ring. The spacer is multiple, connected to the base and arranged circumferentially around it. The retaining ring is connected to the multiple spacer. The clamping assembly includes multiple spaced-apart clamping members. The base abuts against the second end of the clamping assembly. The spacer is located between two adjacent clamping members, and the retaining ring is located on the outer periphery of the clamping assembly.

[0017] Optionally, the moving part includes a sliding part and a pushing part, wherein the outer diameter of the sliding part is larger than the outer diameter of the pushing part. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a first embodiment of a rebar connection device provided in this application; Figure 2 yes Figure 1 A schematic diagram of the steel reinforcement connection device shown from another perspective; Figure 3 yes Figure 2 A sectional view of the reinforcing bar connection device shown; Figure 4 yes Figure 2 Exploded view of the steel reinforcement connection device shown; Figure 5 This is a three-dimensional structural schematic diagram of a second embodiment of a rebar connection device provided in this application; Figure 6 yes Figure 5 A schematic diagram of the steel reinforcement connection device shown from another perspective; Figure 7 yes Figure 6 A sectional view of the reinforcing bar connection device shown; Figure 8 yes Figure 6 Exploded view of the steel reinforcement connection device shown; Figure 9 for Figure 7 A schematic diagram of the mating structure between the clamping assembly and the support frame; Figure 10 for Figure 9 Exploded view.

[0019] Figure label: 1. Clamping assembly; 1a. First clamping assembly; 1b. Second clamping assembly; 10. Clamping element; 11. First end; 12. Second end; 2. Pressure assembly; 21. Moving part; 21a. First moving part; 21b. Second moving part; 211. Sliding part; 212. Pushing part; 22. Cylinder body; 221. Pressurization hole; 222. Partition; 223. First connecting part; 224. Second connecting part; 31. First cylinder; 311. Third connecting part; 32. Second cylinder; 321. Fourth connecting part; 41. First partition; 42. Second partition; 51. First elastic element; 52. Second elastic element; 61. First limiting component; 62. Second limiting component; 7. Annular elastic element; 8. Support frame; 81. Seat body; 82. Spacer; 83. Coil. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0021] See Figures 1-10 To facilitate understanding of the steel bar connection device provided in this application, its application scenario will be described first. The steel bar connection device provided in this application is mainly used in building construction to connect two steel bars together along their length to meet construction requirements of different dimensions.

[0022] In related technologies, a rebar connection device includes a clamping assembly 1 and a cylinder. The clamping assembly 1 includes multiple circumferentially arranged clamping members 10. The outer circumferential surface of the clamping assembly 1 engages with the inner hole of the cylinder via an inclined surface. The inclined surface gradually approaches the axis of the clamping assembly 1 along the direction towards the insertion end, i.e., the inner diameter of the cylinder gradually decreases along the end towards the insertion end. After the rebar is inserted into the clamping assembly 1 along the insertion end, due to the friction between the rebar and the clamping assembly 1, when a force is applied to the rebar in the direction towards the insertion end, the rebar drives the clamping assembly 1 to move towards the insertion end. Since the diameter of the inner hole of the cylinder is smaller the closer to the insertion end, the multiple clamping members 10 are subjected to force and move towards each other, thereby clamping and fixing the rebar.

[0023] However, currently, after the reinforcing bar is connected to the clamping component 1, the preload between the reinforcing bar and the clamping component 1 is insufficient to completely fix the reinforcing bar and the clamping component 1 relative to each other. When the reinforcing bar is subjected to a large external force, it will move relative to the reinforcing bar connection device, which will cause the building to crack and affect the building's safety.

[0024] This application provides a rebar connection device, see reference. Figures 1-8The main improvement is made to the rebar connection device that fixes the rebar by clamping components. The rebar connection device includes a clamping component 1 and a pressure component 2 connected together. Along the axial direction of the clamping component 1, the clamping component 1 has a first end 11 and a second end 12. The first end 11 is provided with an insertion end. The pressure component 2 is located on the side of the second end 12 opposite to the first end 11. The pressure component 2 includes a driving structure and a moving part 21. The driving structure can drive the moving part 21 to move toward the clamping component 1.

[0025] In the above scheme, the first end 11 of the clamping assembly 1 is provided with an insertion end, while the pressure assembly 2 is located on the side of the second end 12 of the clamping assembly 1 facing away from the first end 11. In this way, after the reinforcing bar is inserted into the clamping assembly 1 along the insertion end, when the driving structure drives the moving part 21 to move towards the clamping assembly 1, the moving part 21 can push the reinforcing bar, thereby increasing the preload between the reinforcing bar and the clamping assembly 1 and improving the stability of the reinforcing bar clamping device.

[0026] Specifically, when the driving structure drives the moving part 21 to move towards the insertion end, the moving part 21 abuts against the end of the rebar and pushes the end of the rebar to move towards the insertion end. Since the clamping assembly 1 and the cylinder achieve self-locking through the inclined surface cooperation, the pushing force of the moving part 21 on the rebar is converted into the clamping force of the clamping assembly 1 on the rebar, realizing the pre-tightening between the rebar and the clamping assembly 1, preventing the rebar from displacing relative to the clamping assembly 1 under the action of external force after being connected by the rebar connecting device, and improving the stability of the connection between the rebar and the rebar connecting device.

[0027] In some examples, the rebar connection device also includes a cylinder, at least a portion of which has a tapered inner bore, the diameter of which gradually decreases towards the insertion end. To achieve a self-locking function, the clamping assembly 1 includes a plurality of circumferentially arranged clamping members 10, with a circumferential gap between adjacent clamping members 10. The outer circumferential surface of the clamping member 10 is tapered, corresponding to the inner bore of the cylinder. When the rebar is inserted into the insertion end, under the action of friction, the rebar drives the clamping assembly 1 to move along the direction from the first end 11 towards the second end 12, and the plurality of clamping members 10 move away from the axis of the clamping assembly 1, so that the rebar is accommodated between the plurality of clamping members 10. When the rebar moves from the second end 12 towards the first end 11, under the action of friction, the clamping assembly 1 moves towards the first end 11, and the closer to the first end 11, the smaller the inner bore diameter of the cylinder, allowing the clamping assembly 1 to clamp and fix the rebar.

[0028] For example, the number of clamping elements 10 can be 2, 3, 4, 5, etc.

[0029] In some examples, in order to improve the stability of the clamping component 1 in clamping the steel bar, protrusions can be provided on the surface of the clamping component 1 facing away from the cylinder. Since the force-bearing area of ​​the protrusions is small, when the clamping force of the clamping component 1 reaches a certain value, the protrusions will embed into the surface of the steel bar, thereby improving the stability of the connection.

[0030] In some examples, both the clamping assembly 1 and the pressure assembly 2 are located within the inner hole of the cylinder.

[0031] In some examples, both ends of the rebar connection device are clamped by clamping components 1. In this case, the number of pressure components 2 can be one, that is, along the axial direction of clamping components 1, both ends of pressure components 2 are provided with moving parts 21. The driving structure simultaneously drives the two moving parts 21 to move away from each other, so as to apply pre-tightening force to the connection of clamping components 1 and rebar at both ends. The number of pressure components 2 can also be two, and the two pressure components 2 apply thrust to the rebar at both ends of the rebar connection device.

[0032] In other examples, one end of the rebar connection device is provided with a clamping component 1, and the other end is provided with a thread, that is, one end of the rebar connection device is connected to the rebar through the clamping component 1, and the other end is connected to the rebar through the thread.

[0033] In some implementations, see Figures 1-8 The pressure assembly 2 also includes a cylinder 22, and the movable member 21 is slidably and sealedly connected to the inner hole of the cylinder 22. The movable member 21 and the cylinder 22 form a pressure chamber. The cylinder 22 is provided with a pressurizing hole 221, which is used to inject a pressure medium into the pressure chamber to drive the movable member 21 to move toward the clamping assembly 1.

[0034] In the above scheme, the moving part 21 and the cylinder 22 form a pressure chamber. Injecting a pressure medium into the pressure chamber through the pressure port 221 increases the pressure within the chamber, thereby driving the moving part 21 to move towards the clamping assembly 1. The pressure assembly 2 has a simple structure and is easy to manufacture.

[0035] In some examples, a check valve can be installed at the pressure port 221 to seal the pressure medium in the pressure chamber.

[0036] In other examples, the pressure port 221 is an open structure. After the pressure medium is injected into the pressure chamber through the pressure port 221, the pressure chamber is connected to the outside through the pressure port 221.

[0037] In some examples, the pressure medium can be either a gas or a liquid.

[0038] In some examples, the pressure assembly 2 also includes a seal disposed between the moving member 21 and the wall of the inner bore of the cylinder 22, so that the moving member 21 and the inner bore of the cylinder 22 can slide and be sealed together. The seal can be an O-ring, a rectangular sealing ring, etc.

[0039] In some implementations, see Figures 1-8 The clamping component 1 includes a first clamping component 1a and a second clamping component 1b, and the pressure component 2 includes a first moving member 21a and a second moving member 21b. The first clamping component 1a and the second clamping component 1b are connected to opposite ends of the pressure component 2. The driving structure can drive the first moving member 21a to move toward the first clamping component 1a and drive the second moving member 21b to move toward the second clamping component 1b.

[0040] In the above scheme, the pressure component 2 includes a first moving part 21a and a second moving part 21b, and the driving structure can drive the first moving part 21a to move toward the first clamping component 1a, and can also drive the second moving part 21b to move toward the second clamping component 1b. By using a single pressure component 2 to pre-tighten the two steel bars connected by the steel bar connection device, the device structure is simplified and the convenience of steel bar connection is improved.

[0041] Specifically, for ease of understanding, this embodiment refers to the two connected reinforcing bars as the first reinforcing bar and the second reinforcing bar. The first reinforcing bar is inserted through the insertion end of the first clamping component 1a, and the second reinforcing bar is inserted through the insertion end of the second clamping component 1b. The first clamping component 1a and the second clamping component 1b clamp the two reinforcing bars respectively. The pressure component 2 is located between the first clamping component and the second clamping component 1b, and simultaneously drives the first moving part 21a and the second moving part 21b to move toward the first clamping component 1a and the second clamping component 1b respectively. The first moving part 21a pushes the first reinforcing bar to achieve pre-tightening between the first reinforcing bar and the first clamping component 1a, and the second moving part 21b pushes the second reinforcing bar to achieve pre-tightening between the second reinforcing bar and the second clamping component 1b. In one operation, the two reinforcing bars and the reinforcing bar connecting device are pre-tightened simultaneously, reducing the number of operation steps.

[0042] In some examples, the first clamping component 1a and the second clamping component 1b are the same size, which can be used to connect two steel bars of the same diameter.

[0043] In other examples, the first clamping component 1a and the second clamping component 1b are of different sizes, which can be used to connect two steel bars with different diameters.

[0044] In some implementations, see Figures 1-8The pressure chamber is provided with a partition 222. Along the axial direction of the pressure chamber, the first moving part 21a and the second moving part 21b are located on both sides of the partition 222, and the pressurization hole 221 passes through the partition 222.

[0045] In the above scheme, the partition 222 can limit the first moving member 21a and the second moving member 21b, preventing the first moving member 21a or the second moving member 21b from being biased to the same side in the length direction of the rebar connection device, thereby improving the stability of the pre-tightening between the first rebar and the first clamping assembly 1a, and between the second rebar and the second clamping assembly 1b.

[0046] Specifically, when the pressure assembly 2 is provided with a first moving member 21a and a second moving member 21b, the partition 222 can limit the initial positions of the first moving member 21a and the second moving member 21b, preventing them from moving in the same direction when the pressure chamber is pressurized. By providing a pressure port 221 through the partition 222, the pressure medium injected into the pressure chamber through the pressure port 221 can drive the first moving member 21a and the second moving member 21b to move in different directions.

[0047] In some examples, the partition 222 and the cylinder 22 are integral structures. For example, the partition 222 is an annular boss. Along the axial direction of the pressure chamber, the first moving member 21a and the second moving member 21b are respectively displaced to both sides of the partition 222.

[0048] In other examples, the partition 222 is connected to the cylinder 22 via a threaded structure or the like.

[0049] In some implementations, see Figures 1-8 The rebar connection device also includes a first cylinder 31 and a second cylinder 32. The first cylinder 31 has a first receiving cavity, and the second cylinder 32 has a second receiving cavity. A first clamping assembly 1a is received in the first receiving cavity, and a second clamping assembly 1b is received in the second receiving cavity. One end of the cylinder 22 is connected to the first cylinder 31, and the other end is connected to the second cylinder 32.

[0050] In the above scheme, the two ends of the cylinder 22 are connected to the first cylinder 31 and the second cylinder 32, respectively. This reduces the number of parts in the steel bar connection device, improves structural compactness, and lowers production costs.

[0051] In some examples, at least a portion of the first and second accommodating cavities are tapered holes, and the outer peripheral surfaces of the first clamping assembly 1a and the second clamping assembly 1b are tapered surfaces. The tapered hole of the first accommodating cavity engages with the tapered surface of the first clamping assembly 1a to achieve self-locking of the reinforcing bar, and the tapered hole of the second accommodating cavity engages with the tapered surface of the second clamping assembly 1b to achieve self-locking of the reinforcing bar.

[0052] In some examples, the cylinder 22 is connected to the first cylinder 31 and the second cylinder 32 in the same way.

[0053] In other examples, the cylinder 22 is connected to the first cylinder 31 and the second cylinder 32 in a different way.

[0054] In some examples, the cylinder 22 can be connected to the first cylinder 31 and the second cylinder 32 via a threaded connection or a snap-fit ​​connection.

[0055] In some examples, both the outer circumferential surfaces of the first cylinder 31 and the second cylinder 32 are provided with wrench stands. The wrench stands are used to engage the wrenches, facilitating circumferential fixation of the wrenches to the first cylinder 31 and the second cylinder 32. The cross-section of the wrench stands can be a regular square, a regular pentagon, a regular hexagon, etc.

[0056] In some implementations, see Figures 1-4 One end of the cylinder body 22 is provided with a first connecting part 223 and the other end is provided with a second connecting part 224. Both the first connecting part 223 and the second connecting part 224 are provided with internal threads. The part between the first connecting part 223 and the second connecting part 224 and the moving part 21 form a pressure chamber.

[0057] In the above scheme, the first connecting part 223 and the second connecting part 224 at both ends of the cylinder 22 are connected to the first cylinder 31 and the second cylinder 32 through internal threads, which is simple in structure and easy to operate.

[0058] In some examples, the first cylinder 31 is provided with a third connecting part 311, which has an external thread and is connected to the internal thread of the first connecting part 223 via the external thread. The second cylinder 32 is provided with a fourth connecting part 321, which has an external thread and is connected to the second connecting part 224 via a thread.

[0059] In some examples, the portion between the first connecting part 223 and the second connecting part 224 is a cylindrical hole, and both the first moving part 21a and the second moving part 21b are slidably connected to the inner wall of the cylindrical hole.

[0060] In some implementations, see Figures 1-4The rebar connection device also includes a first partition 41, a second partition 42, a first elastic member 51, and a second elastic member 52. The first cylinder 31 has a third connecting portion 311, and the second cylinder 32 has a fourth connecting portion 321. The first partition 41 is connected between the third connecting portion 311 and the first connecting portion 223. One end of the first elastic member 51 abuts against the first clamping assembly 1a, and the other end abuts against the first partition 41. The second partition 42 is connected between the second connecting portion 224 and the fourth connecting portion 321. One end of the second elastic member 52 abuts against the second clamping assembly 1b, and the other end abuts against the second partition 42.

[0061] In the above scheme, one end of the first elastic member 51 abuts against the first clamping assembly 1a, and one end of the second elastic member 52 abuts against the second clamping assembly 1b. The first elastic member 51 applies a pushing force to the first clamping assembly 1a, and under the action of the conical hole in the first cylinder 31, the first clamping assembly 1a can hold tightly to the outer periphery of the first reinforcing bar. The second elastic member 52 applies a pushing force to the second clamping assembly 1b, and under the action of the conical hole in the second cylinder 32, the second clamping assembly 1b can hold tightly to the outer periphery of the second reinforcing bar, improving the stability of the clamping assembly 1 in clamping the reinforcing bar. The first partition member 41 and the second partition member 42 are used to abut against the first elastic member 51 and the second elastic member 52 on the one hand, and to limit the movement of the first moving member 21a and the second moving member 21b on the other hand, preventing excessive movement of the first moving member 21a and the second moving member 21b, which could cause damage to the clamping assembly 1 or the first cylinder 31 and the second cylinder 32, thereby improving the stability of the reinforcing bar connection device.

[0062] In some examples, the first elastic element 51 and the second elastic element 52 can be a compression spring, a disc spring, etc.

[0063] In some examples, the first partition 41 and the second partition 42 can be gaskets, with the first partition 41 sandwiched between the first connecting portion 223 and the third connecting portion 311, and the second partition 42 sandwiched between the second connecting portion 224 and the fourth connecting portion 321.

[0064] In other examples, the outer peripheral surfaces of the first partition 41 and the second partition 42 are both provided with external threads. The first partition 41 is connected to the first connecting part 223 through the external thread, and the second partition 42 is connected to the second connecting part 224 through the external thread.

[0065] In some implementations, see Figures 5-8The cylinder body 22 has a first connecting part 223 at one end and a second connecting part 224 at the other end. Both the first connecting part 223 and the second connecting part 224 are provided with external threads. The rebar connecting device also includes a first elastic element 51 and a second elastic element 52. One end of the first elastic element 51 abuts against the first clamping assembly 1a and the other end abuts against the pressure assembly 2. One end of the second elastic element 52 abuts against the second clamping assembly 1b and the other end abuts against the pressure assembly 2.

[0066] In the above scheme, both the first connecting part 223 and the second connecting part 224 are provided with external threads, which can reduce the volume of the cylinder body 22 and facilitate production and processing.

[0067] In some examples, the first cylinder 31 is provided with a third connecting part 311, and the second cylinder 32 is provided with a fourth connecting part 321. Both the third connecting part 311 and the fourth connecting part 321 are provided with internal threads. The first connecting part 223 and the third connecting part 311 are connected by a threaded structure, and the second connecting part 224 and the fourth connecting part 321 are connected by a threaded structure.

[0068] In some examples, the first elastic element 51 abuts against one end of the cylinder 22, and the second elastic element 52 abuts against the other end of the cylinder 22.

[0069] In some implementations, see Figures 5-8 The pressure assembly 2 also includes a first limiting member 61 and a second limiting member 62. The first limiting member 61 is connected to one end of the cylinder body 22, and the second limiting member 62 is connected to the other end of the cylinder body 22. The first limiting member 61 is used to limit the first moving member 21a, and the second limiting member 62 is used to limit the second moving member 21b.

[0070] In the above scheme, a first limiting member 61 and a second limiting member 62 are respectively provided at both ends of the cylinder body 22. The first limiting member 61 can limit the position of the first moving member 21a to prevent the displacement of the first moving member 21a from being too large. The second limiting member 62 can limit the position of the second moving member 21b to prevent the displacement of the second moving member 21b from being too large, thereby improving the stability of the steel bar connection device.

[0071] In some examples, the first limiting member 61 and the second limiting member 62 can be connected to the cylinder body 22 via a threaded structure.

[0072] In other examples, the first limiting member 61 and the second limiting member 62 can be connected to the cylinder body 22 by welding, riveting, or other means.

[0073] In some examples, the first limiting member 61, the second limiting member 62, the cylinder 22, the first moving member 21a, and the second moving member 21b form the pressure assembly 2. The first limiting member 61 and the second limiting member 62 limit the first moving member 21a and the second moving member 21b within the pressure chamber, facilitating the assembly of the rebar connection device.

[0074] In some implementations, see Figure 3 , Figure 7 , Figure 8 , Figure 9 , Figure 10 The rebar connection device also includes a support frame 8, which includes a base portion 81, a spacer portion 82, and a retaining ring portion 83. There are multiple spacer portions 82, which are connected to the base portion 81 and arranged around the circumference of the base portion 81. The retaining ring portion 83 is connected to the multiple spacer portions 82. The clamping assembly includes multiple clamping members 10 arranged at intervals. The base portion 81 abuts against the second end of the clamping assembly. The spacer portion 82 is located between two adjacent clamping members 10. The retaining ring portion 83 is located on the outer periphery of the clamping assembly.

[0075] In the above scheme, the support frame 8 is connected to the clamping assembly to fix multiple clamping parts 10 in the clamping assembly, thereby improving the stability of the clamping assembly.

[0076] In some examples, the seat portion 81 can be a cylindrical seat portion or a square seat portion, etc.

[0077] In some examples, the spacer 82 can be a spacer plate or a spacer column. The number of spacers 82 can be set according to the number of clamping members 10, with one spacer 82 provided between two adjacent clamping members 10.

[0078] In some examples, the loop portion 83 is annular and sleeved on the outer periphery of the clamping assembly. To improve the stability of the loop portion 83, a groove can be provided on the outer periphery of the clamping assembly, and at least a portion of the loop portion 83 is located within the groove.

[0079] In some examples, the support frame 8 can be a flexible support frame 8, for example, made of materials such as rubber or foam.

[0080] In some other embodiments, the rebar connection device further includes an annular support and an annular elastic element 7. The annular support is supported on the inner circumference of the clamping assembly, and the annular elastic element 7 is sleeved on the outer circumference of the clamping assembly. The cooperation of the annular support and the annular elastic element 7 improves the stability of the clamping assembly during transportation and installation, preventing the multiple clamping elements 10 in the clamping assembly from becoming scattered. The annular support can be a steel ring or plastic ring with elasticity and an opening, and the annular elastic element 7 can be a rubber component or an elastic retaining ring, etc. Specifically, a first groove is provided on the inner circumference of the clamping assembly, and a second groove is provided on the outer circumference. The annular support is disposed in the first groove, and the annular elastic element 7 is disposed in the second groove to improve the stability of the connection between the annular support and the annular elastic element 7 and the clamping assembly.

[0081] Compared to the above embodiments, this embodiment uses a support frame to fix the clamping component 1, reducing the number of parts used to fix the clamping component 1 and making installation easier.

[0082] In some implementations, see Figures 1-8 The moving part 21 includes a sliding part 211 and a pushing part 212, wherein the outer diameter of the sliding part 211 is larger than the outer diameter of the pushing part 212.

[0083] In the above scheme, the moving part 21 has a simple structure and is easy to process.

[0084] In some examples, the sliding part 211 is slidably connected to the inner wall of the pressure chamber, and the pushing part 212 is used to push the reinforcing bar.

[0085] In some examples, the sliding part 211 and the pushing part 212 are an integral structure.

[0086] In other examples, the sliding part 211 and the pushing part 212 are separate structures, which can be connected by means of threads, welding, etc.

[0087] In conjunction with the above embodiments, the technical effects of the rebar connection device provided in this application will be further explained. According to relevant requirements, after the rebar connection device connects the rebars, under a preset tensile force, the amount of axial movement (residual deformation) of the rebar relative to the rebar connection device along the axial direction should be less than or equal to 0.1 mm. If the axial movement is too large, cracks may occur at the connection between the rebar and the rebar connection device under conditions such as building vibration, affecting the stability of the building. Table 1 provides experimental data on the residual deformation during experiments with the rebar connection device provided in this application and other rebar connection devices equipped with clamping components. The rebar used in this experiment is a 20 mm diameter threaded rebar, the experimental equipment is a universal testing machine, and the rebar yield strength is 550 N (i.e., the preset tensile force is 550 N).

[0088] Table 1 Table 1 provides experimental data from 5 sets of comparative examples and 5 sets of embodiments for comparison. According to Table 1, the residual deformation in the experimental data of the rebar connection device without pressure component 2 does not meet the requirements. The residual deformation of the rebar connection device in the embodiments of this application meets the relevant requirement of less than or equal to 0.1 mm. Therefore, the rebar connection device provided by this application can improve the stability of the rebar connection.

[0089] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0090] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A steel bar connection device, characterized in that, The device includes a connected clamping assembly and a pressure assembly. Along the axial direction of the clamping assembly, the clamping assembly has a first end and a second end. The first end is the insertion end of the reinforcing bar. The pressure assembly is located on the side of the second end opposite to the first end. The pressure assembly includes a driving structure and a moving member. The driving structure is capable of driving the moving member to move toward the clamping assembly.

2. The steel bar connection device according to claim 1, characterized in that, The pressure assembly also includes a cylinder, the movable member is slidably and sealingly connected to the inner bore of the cylinder, and the movable member and the cylinder form a pressure chamber; The cylinder body is provided with a pressurization port, which is used to inject a pressure medium into the pressure chamber to drive the moving part to move toward the clamping assembly.

3. The steel bar connection device according to claim 2, characterized in that, The clamping assembly includes a first clamping assembly and a second clamping assembly, and the pressure assembly includes a first moving member and a second moving member. The first clamping assembly and the second clamping assembly are connected to opposite ends of the pressure assembly. The driving structure can drive the first moving member to move toward the first clamping assembly and drive the second moving member to move toward the second clamping assembly.

4. The steel bar connection device according to claim 3, characterized in that, The pressure chamber is provided with a partition. Along the axial direction of the pressure chamber, the first moving member and the second moving member are respectively located on both sides of the partition. The pressurization hole passes through the partition.

5. The steel bar connection device according to claim 3, characterized in that, The steel bar connection device further includes a first cylinder and a second cylinder. The first cylinder is provided with a first receiving cavity, and the second cylinder is provided with a second receiving cavity. The first clamping component is received in the first receiving cavity, and the second clamping component is received in the second receiving cavity. One end of the cylinder is connected to the first cylinder, and the other end is connected to the second cylinder.

6. The steel bar connection device according to claim 5, characterized in that, One end of the cylinder is provided with a first connecting part, and the other end is provided with a second connecting part. Both the first connecting part and the second connecting part are provided with internal threads. The portion between the first connecting part and the second connecting part and the moving part forms a pressure chamber.

7. The steel bar connection device according to claim 6, characterized in that, The rebar connection device further includes a first partition, a second partition, a first elastic member, and a second elastic member. The first cylinder is provided with a third connecting part, and the second cylinder is provided with a fourth connecting part. The first partition is connected between the third connecting part and the first connecting part. One end of the first elastic member abuts against the first clamping assembly, and the other end abuts against the first partition. The second partition is connected between the second connecting part and the fourth connecting part. One end of the second elastic member abuts against the second clamping assembly, and the other end abuts against the second partition.

8. The steel bar connection device according to claim 5, characterized in that, One end of the cylinder body is provided with a first connecting part, and the other end is provided with a second connecting part. Both the first connecting part and the second connecting part are provided with external threads. The rebar connection device further includes a first elastic element and a second elastic element. One end of the first elastic element abuts against the first clamping component, and the other end abuts against the pressure component. One end of the second elastic element abuts against the second clamping component, and the other end abuts against the pressure component.

9. The steel bar connection device according to claim 8, characterized in that, The pressure assembly further includes a first limiting member and a second limiting member, wherein the first limiting member is connected to one end of the cylinder body and the second limiting member is connected to the other end of the cylinder body; The first limiting member is used to limit the first moving member, and the second limiting member is used to limit the second moving member.

10. The steel bar connection device according to claim 1, characterized in that, The steel bar connection device further includes a support frame, which includes a base, a spacer, and a retaining ring. There are multiple spacers, which are connected to the base and arranged around the circumference of the base. The retaining ring is connected to the multiple spacers. The clamping assembly includes a plurality of clamping members spaced apart. The base portion abuts against the second end of the clamping assembly. The spacer portion is located between two adjacent clamping members. The retaining ring portion is located on the outer periphery of the clamping assembly.

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