A quick-insert type steel bar connector

Abstract

A quick-insert steel bar connector relates to the technical field of steel bar connection. It includes a sleeve, a connecting piece, a spring, and a clamping piece. The sleeve includes a first sleeve and a second sleeve with the same structure. The first sleeve and the second sleeve are connected by a connecting piece. One end of the sleeve is the steel bar insertion end, and the other end is the connection end. The inside of the sleeve is a hollow cavity structure. In the order from the insertion end to the connection end, the inside of the sleeve is successively an insertion port, a clamping piece cavity, and a connection end. The clamping piece cavity is a conical cavity, and there are four clamping plates on the inner wall of the clamping piece cavity. The four clamping plates evenly divide the outer circumference of the conical cavity into four slots for accommodating the clamping pieces. There are steel bar biting teeth on the inner wall of the clamping piece. The spring always maintains a thrust force on the clamping piece towards the insertion port direction. The present invention only needs to insert the end of the steel bar to complete the connection, without the assistance of additional connection equipment, saving time and effort, with convenient and fast connection, and stable and firm connection, greatly improving the efficiency and quality of building construction.

Description

Technical Field

[0001] The present invention relates to the technical field of steel bar connection, and specifically relates to a quick-insert steel bar connector. Background Art

[0002] In building construction, it is often necessary to connect steel bars to each other to increase the length of the steel bars to meet the needs of building construction, and the firmness and stability of the connection will directly affect the quality of building construction.

[0003] Currently, the commonly used steel bar connection methods include straight thread connection and cold extrusion connection. For straight thread connection, the connection end of the steel bar needs to be threaded on-site so that the connection section of the steel bar can be matched with the thread of the straight thread connection device. However, threading the connection end of the steel bar on-site is not only time-consuming and laborious, but also the processing accuracy is unstable, resulting in unstable connection quality. Cold extrusion connection requires a hydraulic press to be set up at the construction site for pressing operations, which is also time-consuming and laborious. Sometimes, due to space limitations at the construction site, it is difficult to find a suitable position for the large hydraulic press to operate. Moreover, the above two connection methods are also affected by the operation level of workers, the engineering quality is difficult to guarantee, there are potential safety hazards, and the efficiency of building construction is affected. Summary of the Invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a quick-insert steel bar connector, which has a simple structure. Only by inserting the end of the steel bar can the connection be completed, without the assistance of additional connection equipment, saving time and labor, being convenient and fast in connection, and having stable and firm connection, greatly improving the efficiency and quality of building construction.

[0005] To solve the above problems, the present invention adopts the following technical solution: A quick-insert steel bar connector, characterized in that it includes a sleeve, a connecting piece, a spring, and clamping pieces.

[0006] The sleeve includes a first sleeve and a second sleeve with the same structure. The first sleeve and the second sleeve are connected by a connecting piece. One end of the sleeve is the steel bar insertion end, and the other end is the connection end. The inside of the sleeve is a hollow cavity structure. In the order from the insertion end to the connection end, the inside of the sleeve is successively an insertion port, a clamping piece cavity, and a connection end. The clamping piece cavity is a conical cavity. There are four clamping plates on the inner wall of the clamping piece cavity. The four clamping plates evenly divide the outer circumference of the conical cavity into four slots for accommodating the clamping pieces. The top of the clamping plate protrudes outward in a dovetail shape, and the top of the clamping plate is arranged in cooperation with the side of the clamping piece. An insertion slot for accommodating the insertion of the clamping piece is formed between adjacent clamping plates along the length direction of the inner wall of the clamping piece cavity.

[0007] The inner wall of the clamping piece is provided with steel bar biting teeth. The outer wall of the clamping piece is a conical arc surface that matches the inner wall of the clamping piece cavity. The two sides of the clamping piece are matched with the clamping plates. The steel bar biting teeth incline towards the connecting piece.

[0008] The inner cavity of the spring is larger than the outer diameter of the connected steel bar. One end of the spring is arranged inside the connecting piece. After the sleeve and the connecting piece are connected, the spring is compressed. The other end of the spring abuts against the end of the clamping piece. The spring always maintains a thrust force on the clamping piece in the direction of the insertion port. When the clamping piece moves along the slot in the direction of the insertion port, the clamping piece moves closer to the axis direction of the sleeve, thereby tightly clamping the inserted steel bar.

[0009] Furthermore: A partition is provided in the middle of the connecting piece. A spring through hole is provided in the middle of the partition. The spring passes through the through hole, and there is half of the spring on each side of the partition.

[0010] The beneficial effects of the present invention are:

[0011] 1. Its structure is simple. Just insert the end of the steel bar to complete the connection, without the assistance of additional connecting equipment, saving time and effort, with convenient and fast connection, and the connection is stable and firm, greatly improving the efficiency and quality of building construction.

[0012] 2. The top of the clamping plate protrudes outwards in a dovetail shape. The top of the clamping plate is arranged in cooperation with the side of the clamping piece. Slots for accommodating the insertion of the clamping piece are formed between adjacent clamping plates along the length direction of the inner wall of the clamping piece cavity. This structural design enables the clamping piece to only be inserted or withdrawn along the length direction of the slot, and the clamping piece will not move radially. First, it makes the installation of the clamping piece more convenient and fast, just directly insert it into the slot. Second, the four clamping pieces can only move along the direction of the slot, ensuring the consistency of the movement trajectories of the four clamping pieces, so that the four clamping pieces tightly clamp the steel bar simultaneously in the same state, and there will be no phenomenon that the clamping force around the steel bar is uneven, resulting in unstable connection.

[0013] 3. A partition is provided in the middle of the connecting piece. A spring through hole is provided in the middle of the partition. The spring passes through the through hole, and there is half of the spring on each side of the partition. When installing the spring, one spring can be used, and the end of the spring is introduced from the spring insertion hole, so that there is half of the compression spring on each side of the partition. In this way, the installation of the spring is more convenient during use, and it can ensure that the springs in the first sleeve and the second sleeve have the same elastic force on the clamping pieces on both sides, ensuring more stable and reliable connection.

[0014] 4. The inner cavity of the spring is larger than the outer diameter of the connected steel bar. This structural design enables the steel bar not to directly contact the spring when inserted into the sleeve, avoiding connection failure and ensuring more stable and reliable connection.

[0015] 5. The inner wall of the wedge has steel bar engaging teeth which are inclined towards the connecting piece. When the steel bar is inserted, the wedge will move towards the connecting piece under extrusion, and at this time the spring will be further compressed. As the wedge moves, it will move away from the axis of the sleeve. At this time, the wedge moves away from the steel bar and the steel bar can be smoothly inserted. After the steel bar is inserted to the bottom and is pulled outwards in the reverse direction, under the action of the spring, the steel bar engaging teeth will bite the outer wall of the steel bar. As the pulling force increases, the steel bar engaging teeth will embed into the outer wall of the steel bar, and the greater the pulling force, the greater the clamping force of the wedge on the steel bar, thus ensuring the firm and reliable connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the drawings and embodiments:

[0017] Figure 1 is a schematic structural view of the present invention;

[0018] Figure 2 is a schematic structural view of the sleeve of the present invention;

[0019] Figure 3 is a schematic structural view of the sleeve of the present invention;

[0020] Figure 4 is a schematic structural view of the wedge of the present invention;

[0021] Figure 5 is a schematic structural view of the wedge of the present invention;

[0022] Figure 6 is a schematic structural view of the wedge of the present invention;

[0023] Figure 7 is a schematic structural view of the connecting piece of the present invention;

[0024] In the figure: 1 sleeve, 11 insertion end, 12 connection end, 13 wedge cavity, 14 slot, 2 clamping plate, 3 wedge, 31 steel bar engaging teeth, 32 inner wall of the wedge, 33 outer wall of the wedge, 4 connecting piece, 41 partition plate, 42 spring through hole, 5 spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] As Figures 1 to 7 shown, a quick - insertion type steel bar connector includes a sleeve 1, a connecting piece 4, a spring 5, and a wedge 3.

[0026] The sleeve 1 described above includes a first sleeve and a second sleeve with the same structure. The first sleeve and the second sleeve are connected by a connecting piece 4. One end of the sleeve 1 is a steel bar insertion end 11, and the other end is a connecting end 12. The inside of the sleeve 1 is a hollow cavity structure. In the order from the insertion end 11 to the connecting end 12, the inside of the sleeve 1 is successively an insertion port, a collet cavity 13, and a connecting end. The collet cavity 13 is a conical cavity. Four clamping plates 2 are provided on the inner wall of the collet cavity 13. The outer periphery of the conical cavity is evenly divided into four slots 14 for accommodating collets 3 by the four clamping plates 2. The top of the clamping plate 2 protrudes outward in a dovetail shape, and the top of the clamping plate 2 is arranged in cooperation with the side of the collet 3. An insertion slot 14 for accommodating the insertion of the collet is formed between adjacent clamping plates 2 along the length direction of the inner wall of the collet cavity 13.

[0027] Reinforcing bar engaging teeth 31 are provided on the inner wall 32 of the collet. The outer wall 33 of the collet is a conical arc surface that matches the inner wall of the collet cavity 13. The two sides of the collet 3 are matched with the clamping plate 2, and the reinforcing bar engaging teeth 31 incline towards the connecting piece.

[0028] The inner cavity of the spring 5 is larger than the outer diameter of the connected steel bar. One end of the spring 5 is arranged inside the connecting piece 4. After the sleeve 1 and the connecting piece 4 are connected, the spring 5 is compressed. The other end of the spring 5 abuts against the end of the collet 3. The spring 5 always maintains a thrust force on the collet 3 towards the insertion port direction. When the collet 3 moves along the slot 14 towards the insertion port direction, the collet 3 moves closer to the axis direction of the sleeve 1, and then tightly holds the inserted steel bar.

[0029] A partition 41 is provided in the middle of the connecting piece 4 described above. A spring through hole 42 is provided in the middle of the partition 41. The spring 5 passes through the through hole 42, and there is half of the spring 5 on each side of the partition 41.

[0030] During use, the end of the steel bar is directly inserted into the sleeve 1 from the insertion end 11. The collet 3 will move towards the connecting piece 4 under extrusion. At this time, the spring 5 is further compressed. As the collet 3 moves, the collet 3 will move away from the axis direction of the sleeve 1. At this time, the collet 3 is away from the steel bar, and the steel bar can be smoothly inserted. After the steel bar is inserted to the bottom and the steel bar is pulled out in the reverse direction, under the action of the spring 5, the reinforcing bar engaging teeth 31 will bite the outer wall of the steel bar. As the pulling force increases, the reinforcing bar engaging teeth 31 will embed into the outer wall of the steel bar. The greater the pulling force, the greater the clamping force of the collet on the steel bar, thereby ensuring the firm and reliable connection.

[0031] The present invention is not limited to the above embodiments.

Claims

1. A quick - insertion type steel bar connector, characterized in that, It includes a sleeve, a connecting piece, a spring, and a clamping piece. The sleeve includes a first sleeve and a second sleeve with the same structure. The first sleeve and the second sleeve are connected by a connecting piece. One end of the sleeve is the steel bar insertion end, and the other end is the connecting end. The inside of the sleeve is a hollow cavity structure. In the order from the insertion end to the connecting end, the inside of the sleeve is successively an insertion port, a clamping piece cavity, and a connecting end. The clamping piece cavity is a conical cavity. Four clamping plates are provided on the inner wall of the clamping piece cavity. The four clamping plates evenly divide the outer circumference of the conical cavity into four slots for accommodating the clamping pieces. The top of the clamping plate protrudes outward in a dovetail shape. The top of the clamping plate is arranged in cooperation with the side of the clamping piece. A slot for accommodating the insertion of the clamping piece is formed between adjacent clamping plates along the length direction of the inner wall of the clamping piece cavity. Steel bar biting teeth are provided on the inner wall of the clamping piece. The outer wall of the clamping piece is a conical arc surface that matches the inner wall of the clamping piece cavity. The two sides of the clamping piece are arranged in cooperation with the clamping plates. The steel bar biting teeth incline towards the connecting piece. The inner cavity of the spring is larger than the outer diameter of the connected steel bar. One end of the spring is arranged inside the connecting piece. After the sleeve and the connecting piece are connected, the spring is compressed. The other end of the spring abuts against the end of the clamping piece. The spring always maintains a thrust on the clamping piece towards the insertion port direction. When the clamping piece moves along the slot towards the insertion port direction, the clamping piece moves closer to the axis direction of the sleeve, thereby tightly clamping the inserted steel bar.

2. The quick - insertion type steel bar connector according to claim 1, characterized in that, A partition is provided in the middle of the connecting piece. A spring through hole is provided in the middle of the partition. The spring passes through the through hole, and there is half of the spring on each side of the partition.

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