An expansion joint

Abstract

The utility model provides an expansion connector, including an expansion sleeve and a connecting rod with one end placed in the expansion sleeve, one end of the expansion sleeve is provided with an expansion part, the expansion part is provided with a longitudinal incision, the expansion part is divided into at least two expansion blocks that can expand outwards, the middle part of the expansion sleeve is provided with a limit ring to prevent excessive installation at the close position of the expansion part, the other end of the expansion sleeve is provided with a limit clamping hole, the connecting rod has a threaded end and a connecting end, the threaded end is in the limit clamping hole and extends toward the expansion part, can be screwed with the expansion part to make the expansion block expand outwards, the threaded end is provided with a limit medium, the limit medium cooperates with the limit clamping hole, and is used to limit the range of movement of the connecting rod in the expansion sleeve and the depth of the screw connection between the threaded end and the expansion part, the connecting end extends out of the expansion sleeve, and can be used to connect with the locking member in the layer board. The utility model has a simple structure, saves costs, and is easy to install and disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of test tube furniture connectors, in particular to an expansion connector. Background Art

[0002] Traditional three-in-one connectors use the method of knocking in the embedded plastic nut and then screwing in the screw rod, and using the cam principle of the eccentric wheel to lock and realize the connection of wooden boards; traditional 2-in-1 quick-install connectors realize the connection of wooden boards by rotating the eccentric wheel to lift the screw rod to expand and lock, and the expansion sleeve expands when the screw rod is lifted, and the bolt exceeds the fixed plane. The expansion bolt kits currently on the market include bolts and expansion sleeves, in which an expansion part is provided at one end of the bolt, and the expansion sleeve is expanded by using the expansion part of the bolt, so that the expansion bolt and the wall and the board are in an expanded state, and the installation and removal are not convenient. Utility Model Content

[0003] The utility model provides an expansion connector with a simple structure, cost saving and easy installation and disassembly.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An expansion connector comprises an expansion sleeve and a connecting rod with one end placed in the expansion sleeve, an expansion portion is provided at one end of the expansion sleeve, the expansion portion is provided with a longitudinal incision, the expansion portion is divided into at least two expansion blocks that can expand outward, a limit ring is provided at the middle part of the expansion sleeve close to the expansion portion to prevent excessive installation, a limit clamping hole is provided in the other end of the expansion sleeve, the connecting rod has a threaded end and a connecting end, the threaded end is in the limit clamping hole and extends toward the expansion portion, can be screwed with the expansion portion to make the expansion block expand outward, a limit medium is provided on the threaded end, the limit medium cooperates with the limit clamping hole, and is used to limit the range of movement of the connecting rod in the expansion sleeve and the depth of the screw connection between the threaded end and the expansion portion, the connecting end extends out of the expansion sleeve and can be used to connect with a locking member in a layer plate.

[0006] Preferably, the expansion sleeve comprises two matching half-tubes, each half-tube is provided with a buckle and a hole for buckling the two half-tubes together, one half-tube is provided with a positioning column, and the other half-tube is provided with a positioning groove corresponding to the positioning column.

[0007] Preferably, an undercut pattern is provided on the outer surface of the expansion portion to increase the firmness of installation.

[0008] Preferably, the inner hole of the expansion portion is a conical hole with internal threads.

[0009] Preferably, a positioning medium is provided on the connecting end of the connecting rod, which can be used to avoid over-installation during installation, and a connecting head is provided on the end of the connecting end.

[0010] Compared with the prior art, the beneficial effect of the utility model is that the periphery of the expansion sleeve is provided with undercut teeth and the conical hole in the expansion part is provided to cooperate with the threaded end of the connecting rod, making installation easier and more labor-saving. The threaded end is screwed into the expansion part to open the expansion block, which can be firmly locked in the layer board, making the connection more tight and reliable; the limit medium provided on the threaded end cooperates with the limit card hole in the expansion sleeve, effectively avoiding excessive installation during installation and causing damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0012] Figure 2 It is a schematic diagram of the exploded structure of the utility model. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0014] It should be noted that when a component / part is referred to as being "set on" another component / part, it may be directly set on the other component / part or there may also be an intermediate component / part. When a component / part is referred to as being "connected / coupled" to another component / part, it may be directly connected / coupled to the other component / part or there may be an intermediate component / part at the same time. The term "connection / coupling" as used herein may include electrical and / or mechanical physical connections / couplings. The term "includes / comprising" as used herein refers to the presence of a feature, step or component / part, but does not exclude the presence or addition of one or more other features, steps or components / parts. The term "and / or" as used herein includes any and all combinations of one or more relevant listed items.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0016] See also Figure 1 and Figure 2As shown, an expansion connector includes an expansion sleeve 1 and a connecting rod 2 with one end placed in the expansion sleeve 1, an expansion portion 11 is provided at one end of the expansion sleeve 1, the expansion portion 11 is provided with a longitudinal incision 3, the expansion portion 11 is divided into at least two expansion blocks 12 that can expand outward, a limit ring 4 is provided at the middle part of the expansion sleeve 1 close to the expansion portion 11 to prevent excessive installation, a limit clamping hole 5 is provided in the other end of the expansion sleeve 1, the connecting rod 2 has a threaded end 21 and a connecting end 22, the threaded end 21 is in the limit clamping hole 5 and extends toward the expansion portion 11, can be screwed with the expansion portion 11 to make the expansion block 12 expand outward, a limit medium 23 is provided on the threaded end 21, the limit medium 23 cooperates with the limit clamping hole 5, and is used to limit the range of movement of the connecting rod 2 in the expansion sleeve 1 and the depth of the screw connection between the threaded end 21 and the expansion portion 11, and the connecting end 22 extends out of the expansion sleeve 1 and can be used to connect with a locking member in the layer plate.

[0017] The expansion sleeve 1 comprises two matched half-tubes, each of which is provided with a buckle 6 and a clamping hole 7 for buckling the two half-tubes together. One of the half-tubes is provided with a positioning column 9, and the other half-tube is provided with a positioning groove 10 corresponding to the positioning column 9.

[0018] The outer surface of the expansion part 11 is provided with an undercut thread 8 to increase the firmness of the installation. The inner hole of the expansion part 11 is a conical hole with an internal thread. A positioning medium 24 is provided on the connection end 22 of the connecting rod 2, which can be used to avoid over-installation during installation. The end of the connection end 22 is provided with a connector 25, and a tool hole is provided on the connector 25.

[0019] During specific use, first place one end of the expansion portion 11 of the expansion sleeve 1 into the hole reserved in the layer plate, and then rotate the connecting rod 2 so that the threaded end 21 of the connecting rod 2 is screwed into the conical hole in the expansion portion 11, so that the expansion block 12 expands outward and is locked on the layer plate. The limit card hole 5 and the limit medium 23 can avoid over-installation during installation. After installation, the connecting end 22 of the connecting rod 2 can be connected with the eccentric locking wheel or other locking parts.

[0020] The expansion sleeve 1 of the utility model is provided with undercut threads 8 on the periphery and a conical hole in the expansion part 11 which cooperates with the threaded end 21 of the connecting rod 2, making installation easier and more labor-saving. The threaded end 21 is screwed into the expansion part 11 to open the expansion block 12, which can be firmly locked in the layer board, making the connection more tight and reliable; the limiting medium 23 provided on the threaded end 21 cooperates with the limiting card hole 5 in the expansion sleeve 1, effectively avoiding damage caused by excessive installation during installation.

[0021] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An expansion connector, characterized in that: The invention comprises an expansion sleeve and a connecting rod with one end placed in the expansion sleeve, wherein an expansion portion is provided at one end of the expansion sleeve, and the expansion portion is provided with a longitudinal incision, which divides the expansion portion into at least two expansion blocks that can expand outwardly, and a limiting ring is provided at a position close to the expansion portion in the middle of the expansion sleeve to prevent excessive installation, and a limiting clamping hole is provided in the other end of the expansion sleeve, and the connecting rod has a threaded end and a connecting end, and the threaded end is located in the limiting clamping hole and extends toward the expansion portion, and can be screwed with the expansion portion to make the expansion block expand outwardly, and a limiting medium is provided on the threaded end, and the limiting medium cooperates with the limiting clamping hole to limit the range of movement of the connecting rod in the expansion sleeve and the depth of the screw connection between the threaded end and the expansion portion, and the connecting end extends out of the expansion sleeve and can be used to connect with a locking member in the layer plate.

2. The expansion joint according to claim 1, characterized in that: The expansion sleeve comprises two matched half-tubes, each of which is provided with a buckle and a buckle hole for buckling the two half-tubes together, one of the half-tubes is provided with a positioning column, and the other half-tube is provided with a positioning groove corresponding to the positioning column.

3. The expansion joint according to claim 2, characterized in that: An undercut tooth pattern for increasing the firmness of installation is arranged on the outer surface of the expansion portion.

4. The expansion joint according to claim 3, characterized in that: The inner hole of the expansion part is a conical hole with internal threads.

5. The expansion joint according to claim 1, characterized in that: A positioning medium is provided on the connecting end of the connecting rod, which can be used to avoid over-installation during installation, and a connecting head is provided on the end of the connecting end.

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