A reinforcing bar quick connector

Abstract

The utility model discloses a kind of steel bar fast connectors, belong to steel bar connecting technical field, including a pair of sleeve and a connecting barrel, sleeve is threadedly connected at the both ends of connecting barrel;Tapered hole is provided in sleeve, lock piece group is provided in tapered hole, spiral structure is provided between tapered hole and lock piece group, spiral structure is used to make lock piece group axial movement when along helical rotation, lock piece group one end is provided with guide plate, lock piece group and guide plate are provided with clamping groove structure, clamping groove structure is used to make lock piece group rotary motion when along clamping groove radial expansion or close in;Guide plate is slidably arranged in sleeve;The application utilizes the axial movement of spiral structure and steel bar to promote lock piece group to make lock piece group produce rotation, then the lock piece group that rotates is expanded to all around by guide plate, realize the synchronous expansion or close in of multiple lock pieces, i.

Description

Technical Field

[0001] This utility model belongs to the field of rebar connection technology, specifically to a rebar quick connector. Background Technology

[0002] Rebar splice sleeves are a common rebar connection device in engineering. They are simple to install and remove, facilitating quick assembly and disassembly on construction sites. Compared to other connection methods, rebar splice sleeves have relatively low operating costs. In recent years, a self-locking sleeve has appeared on the market. It has an internal locking plate that automatically locks the rebar after insertion, making it particularly easy to operate.

[0003] However, the self-locking connecting sleeves currently on the market have the following drawbacks in actual use: the self-locking between the locking plate group and the rebar relies on the outward tensile force of the rebar. The locking plate group is installed in the conical hole of the sleeve. During the stretching process, the frictional resistance between the transverse ribs on the surface of the rebar and the locking plate group is utilized. In addition, the locking plate group is assembled through the principle of tightening as it is pulled, so that the locking plate group and the rebar are engaged. The tensile force of the rebar can only be provided during subsequent use. When the connecting sleeve and the rebar are assembled together, one or more locking plates will engage with the rebar, making the rebar unable to be pulled. However, one or more locking plates will not fully engage with the rebar. That is, the locking plates of the locking plate group cannot retract synchronously to engage, so only a few locking plates actually play a locking role. The rebar cannot be fully engaged in all directions, resulting in the rebar being easy to shake or even fall out. Utility Model Content

[0004] In view of the above, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a quick connector for reinforcing bars. This application provides the following technical solution: It includes a pair of sleeves and a connecting sleeve, the sleeves being threaded to both ends of the connecting sleeve; each sleeve has a tapered hole, a locking plate assembly is disposed within the tapered hole, and a helical structure is provided between the tapered hole and the locking plate assembly, the helical structure being used to allow the locking plate assembly to rotate helically during axial movement; one end of the locking plate assembly is provided with a guide plate, and a slot structure is provided between the locking plate assembly and the guide plate, the slot structure being used to allow the locking plate assembly to expand or contract radially along the slot during rotational movement; the guide plate is slidably disposed within the sleeve.

[0005] The sleeve is also provided with a clamping spring and a cover plate. The cover plate is threadedly installed inside the sleeve. The two ends of the clamping spring abut against the guide plate and the cover plate respectively, and are used to apply an elastic force toward the tip of the tapered hole to the guide plate and the locking plate assembly.

[0006] The cover plate is provided with a receiving groove, and one end of the clamping spring is fitted into the receiving groove.

[0007] The outer side of the locking plate assembly has an annular groove, and a collar is fitted inside the annular groove.

[0008] The spiral structure includes multiple spiral grooves formed on the wall of the tapered hole and a spiral protrusion disposed on the outside of each locking piece of the locking piece group. The spiral protrusion is engaged with the spiral groove and can slide along the spiral groove.

[0009] The slot structure includes multiple guide arc grooves formed on the guide plate and guide sliding protrusions disposed on the end side of the locking piece. The guide sliding protrusions are correspondingly engaged with the guide arc grooves and can slide along the guide arc grooves.

[0010] The sleeve has three or more axial grooves inside, and the guide plate has a limiting slider corresponding to the axial groove on the outside. The limiting slider cooperates with the axial groove.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: By setting up a spiral structure and a guide plate, when inserting a steel bar into the sleeve for connection, the spiral structure and the steel bar drive the axial movement of the locking plate group to make the locking plate group rotate. Then, the guide plate expands the rotating locking plate group in all directions, realizing the synchronous expansion or contraction of multiple locking plates. That is, each locking plate bites the steel bar at the same time, resulting in a better fixing effect. At the same time, the coaxiality of the steel bar is higher and it is not easy to shake.

[0012] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a cross-sectional view of a quick-connect rebar connector.

[0015] Figure 2 This is a cross-sectional view of the internal components of a rebar quick connector.

[0016] Figure 3 This is a schematic diagram of the internal components assembly of a rebar quick connector.

[0017] Figure 4 This is a schematic diagram of the installation of a guide plate for a rebar quick connector.

[0018] Reference numerals: 1. Sleeve; 11. Tapered hole; 111. Spiral groove; 12. Axial sliding groove; 2. Connecting cylinder; 3. Locking plate assembly; 31. Annular groove; 32. Collar; 33. Locking plate; 331. Rotary protrusion; 332. Guide sliding protrusion; 4. Guide plate; 41. Guide arc groove; 42. Limiting slider; 5. Pressing spring; 6. Cover plate; 61. Receiving groove. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0020] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] Please refer to Figure 1-4 As shown, this utility model provides a quick connector for reinforcing bars, including a pair of sleeves 1 and a connecting cylinder 2. The sleeves 1 are threaded to both ends of the connecting cylinder 2. A tapered hole 11 is provided inside the sleeve 1, and a locking plate assembly 3 is provided inside the tapered hole 11. A spiral structure is provided between the tapered hole 11 and the locking plate assembly 3. The spiral structure is used to make the locking plate assembly 3 rotate along the spiral when it moves axially. A guide plate 4 is provided at one end of the locking plate assembly 3. A slot structure is provided between the locking plate assembly 3 and the guide plate 4. The slot structure is used to make the locking plate assembly 3 expand or contract radially along the slot when it rotates. The guide plate 4 is slidably disposed inside the sleeve 1.

[0023] The sleeve 1 is also provided with a clamping spring 5 and a cover plate 6. The cover plate 6 is threadedly installed inside the sleeve 1. The two ends of the clamping spring 5 abut against the guide plate 4 and the cover plate 6 respectively, and are used to apply an elastic force toward the cone tip of the tapered hole 11 to the guide plate 4 and the locking plate group 3.

[0024] The cover plate 6 is provided with a receiving groove 61, and one end of the clamping spring 5 is fitted into the receiving groove 61; furthermore, in order to facilitate the disassembly and assembly of the cover plate 6, a hexagonal groove is provided on the side of the cover plate 6 that is not provided with the receiving groove 61, on the side outside the sleeve 1.

[0025] The outer side of the locking plate assembly 3 is provided with an annular groove 31, and a collar 32 is fitted into the annular groove 31. The collar 32 is an elastic metal ring with a notch, so as to facilitate its insertion into the annular groove 31 on the outer side of the locking plate assembly 3. The diameter of the collar 32 is larger than the bottom diameter of the annular groove 31 and smaller than the opening diameter of the annular groove 31, so that the locking plate 33 of the locking plate assembly 3 has room to expand outward while making it difficult for the collar 32 to fall out of the annular groove 31.

[0026] The spiral structure includes multiple spiral grooves 111 formed on the wall of the conical hole 11 and a spiral protrusion 331 provided on the outside of each locking piece 33 of the locking piece group 3. The spiral protrusion 331 is engaged with the spiral grooves 111 and can slide along the spiral grooves 111.

[0027] The slot structure includes multiple guide arc grooves 41 formed on the guide plate 4 and a guide sliding protrusion 332 set on the end side of the locking piece 33. The guide sliding protrusion 332 is correspondingly engaged with the guide arc grooves 41 and can slide along the guide arc grooves 41.

[0028] Furthermore, to enhance the fixing effect of the reinforcing bars, the shape and size of the spiral groove 111 and the guide arc groove 41 are calculated and designed in advance during production. Specifically, when the locking plate assembly 3 moves axially, the angle of its rotation along the spiral groove 111 is determined by the spiral groove 111. When the locking plate assembly 3 rotates, the distance by which the locking plate 33 expands outward along the guide arc groove 41 is determined by the guide arc groove 41. By designing and adjusting the shape and size of the spiral groove 111 and the guide arc groove 41, the distance by which the locking plate 33 expands outward when the locking plate assembly 3 moves axially is equal to the radius change value of the conical hole 11. Even when the locking plate assembly 3 moves, the outer side of the locking plate 33 is always close to the inner wall of the conical hole 11, so that the locking plate 33 will not shake and the locking plate 33 is more stable when clamping the reinforcing bars.

[0029] The sleeve 1 has three or more axial grooves 12 inside, and the guide plate 4 has a limiting slider 42 corresponding to the axial grooves 12 on the outside. The limiting slider 42 cooperates with the axial grooves 12.

[0030] In specific implementation, during assembly: the locking pieces 33 are assembled into locking piece group 3 by inserting the collar 32 into the ring groove 31. The spiral protrusion 331 on the side of the locking piece group 3 is aligned with the spiral groove 111 and then inserted into the conical hole 11. The limiting slider 42 of the guide plate 4 is aligned with the axial sliding groove 12 and inserted into the conical hole 11, and one side of the guide plate 4 is made to fit against the locking piece group 3. The guide sliding protrusion 332 is embedded in the guide arc groove 41. Then, the clamping spring 5 is installed into the sleeve 1 and the cover plate 6 is screwed on, so that one end of the clamping spring 5 fits into the receiving groove 61 and abuts, and the other end presses against the guide plate 4 and the locking piece group 3. The assembly of a single sleeve 1 is completed. Then, the two assembled sleeves 1 are screwed on to the connecting cylinder 2.

[0031] In use: Insert the reinforcing bar into the tapered hole 11 from one end of the sleeve 1. Initially, the diameter of the reinforcing bar is larger than the inner diameter of the locking plate assembly 3, thus pushing the locking plate assembly 3 to move axially within the tapered hole 11, compressing the spring 5. At this time, the spiral protrusion 331 on each locking plate 33 of the locking plate assembly 3 is inserted into the spiral groove 111, so the locking plate assembly 3 rotates along the bolt groove 111. The guide plate 4 moves axially together with the locking plate assembly 3, while the limiting slider 42 engages with the axial sliding groove 12. The guide plate 4 does not rotate, so the locking plate assembly 3 rotates relative to the guide plate 4, and the guide sliding protrusion 332 on the locking plate 33 is in the guide arc groove 41. The locking plates 33 slide inwards while rotating, causing the locking plate group 33 to expand outwards until the internal diameter of the locking plate group 33 is larger than that of the reinforcing bar. At this time, the reinforcing bar enters the locking plate group 33. Under the action of the elastic force of the spring 5 and the pulling force of the reinforcing bar, the locking plate group 3 and the guide plate 4 move closer to the cone tip of the conical hole 11. The locking plates 33 slide and rotate along the bolt groove 111. The guide sliding protrusion 332 on the locking plates 33 slides in the guide arc groove 41. Each locking plate 33 moves inwards while rotating, and the locking plate group 3 retracts inwards, biting the reinforcing bar and preventing it from coming out.

[0032] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A quick connector for reinforcing bars, comprising a pair of sleeves (1) and a connecting sleeve (2), wherein the sleeves (1) are threadedly connected to both ends of the connecting sleeve (2); a tapered hole (11) is provided inside the sleeves (1), and a locking plate assembly (3) is provided inside the tapered hole (11), characterized in that: A spiral structure is provided between the tapered hole (11) and the locking plate group (3). The spiral structure is used to make the locking plate group (3) rotate along the spiral when it moves axially. A guide plate (4) is provided at one end of the locking plate group (3). A slot structure is provided between the locking plate group (3) and the guide plate (4). The slot structure is used to make the locking plate group (3) expand or contract radially along the slot when it rotates. The guide plate (4) is slidably disposed in the sleeve (1).

2. The quick connector for reinforcing bars as described in claim 1, characterized in that: The sleeve (1) is also provided with a clamping spring (5) and a cover plate (6). The cover plate (6) is threadedly installed inside the sleeve (1). The two ends of the clamping spring (5) abut against the guide plate (4) and the cover plate (6) respectively, and are used to apply an elastic force toward the tip of the tapered hole (11) to the guide plate (4) and the locking plate group (3).

3. A quick connector for reinforcing bars as described in claim 2, characterized in that: The cover plate (6) is provided with a receiving groove (61), and one end of the clamping spring (5) is fitted into the receiving groove (61).

4. A quick connector for reinforcing bars as described in claim 1, characterized in that: The locking plate group (3) has an annular groove (31) on its outer side, and a collar (32) is fitted inside the annular groove (31).

5. A quick connector for reinforcing bars as described in claim 1, characterized in that: The spiral structure includes a plurality of spiral grooves (111) formed on the wall of the conical hole (11) and a spiral protrusion (331) provided on the outside of each locking piece (33) of the locking piece group (3). The spiral protrusion (331) is fitted into the spiral grooves (111) and can slide along the spiral grooves (111).

6. A quick connector for reinforcing bars as described in claim 5, characterized in that: The slot structure includes multiple guide arc grooves (41) opened on the guide plate (4) and a guide sliding protrusion (332) disposed on the end side of the locking piece (33). The guide sliding protrusion (332) is correspondingly fitted with the guide arc grooves (41) and can slide along the guide arc grooves (41).

7. A quick connector for reinforcing bars as described in claim 1, characterized in that: The sleeve (1) has three or more axial grooves (12) inside, and the guide plate (4) has a limiting slider (42) corresponding to the axial groove (12) on the outside. The limiting slider (42) cooperates with the axial groove (12).

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