CN110513371B - Expansion connecting piece - Google Patents

Abstract

The present invention discloses an expansion connector, including an expansion sleeve, a movable block, a compression spring and a connecting rod. The expansion sleeve has an inner hole extending in the axial direction. The movable block, the compression spring and the connecting rod are arranged in the expansion sleeve. The expansion sleeve is provided with an expansion portion capable of radially expanding outward. The movable block is correspondingly arranged at the inner hole of the expansion portion. The front end of the connecting rod abuts against the movable block. The rear end of the connecting rod extends out of the expansion sleeve. The inner side wall of the expansion sleeve is provided with a first limiting boss and a second limiting boss in sequence along the axial direction. A stop portion is convexly provided in the middle of the connecting rod. The stop portion is located between the first limiting boss and the second limiting boss. The compression spring is sleeved outside the connecting rod and is placed between the first limiting boss and the stop portion. Compared with the prior art, the present invention has the advantages that the connecting rod of the present invention is designed to be resilient, which facilitates the installation of a layer plate connected to the two side plates between the two vertical side plates.

Description

An expansion joint

Technical Field

The invention relates to the technical field of fasteners, and in particular to an expansion connector.

Background Art

Existing expansion connectors generally include a connecting rod and an expansion sleeve sleeved outside the connecting rod, which can be used to connect side panels (vertical panels) and floor panels (horizontal panels). During installation, one end of the expansion connector is first inserted into the floor panel, and then the floor panels are moved closer in a direction perpendicular to the side panels, so that the other end of the expansion connector is inserted into the side panel. Existing expansion connectors cannot be inserted between two vertical side panels to connect the floor panels to the two side panels.

Therefore, it is necessary to improve it.

Summary of the invention

In view of the shortcomings of the prior art, the object of the present invention is to provide an expansion connector with a resilient connecting rod, which can be installed between two vertical side panels to connect the two side panels.

In order to achieve the above purpose, the following technical solutions are provided:

An expansion connector comprises an expansion sleeve, a movable block, a compression spring and a connecting rod. The expansion sleeve is a hollow cylindrical structure with an inner hole extending in the axial direction. The movable block, the compression spring and the connecting rod are arranged in the expansion sleeve. The expansion sleeve is provided with an expansion portion that can expand radially outward. The movable block is correspondingly arranged at the inner hole of the expansion portion. The front end of the connecting rod abuts against the movable block, and the rear end of the connecting rod extends out of the expansion sleeve. The inner side wall of the expansion sleeve is sequentially provided with a first limiting boss and a second limiting boss in the axial direction. A stop portion is convexly provided on the middle part of the connecting rod, and the stop portion is located between the first limiting boss and the second limiting boss. The compression spring is sleeved outside the connecting rod and is placed between the first limiting boss and the stop portion.

Applying an inward operating force to the rear end of the connecting rod can move the connecting rod forward, and the rear end of the connecting rod is hidden in the inner hole of the expansion sleeve. The forward movement of the connecting rod pushes the movable block forward, and the movable block causes the expansion part to expand radially outward.

Optionally, the expansion sleeve includes two mating first bodies and second bodies, and the first body and the second body are engaged with or separated from each other through a locking structure.

Optionally, the first body and/or the second body is provided with a positioning hole, and the second body and/or the first body is correspondingly provided with a positioning cog that matches the positioning hole, the end of the positioning cog is hook-shaped, and the end of the positioning cog is embedded in the positioning hole to connect the first body and the second body as one.

Optionally, the expansion portion is provided with at least one expansion block capable of expanding outward, the expansion block extends axially along the expansion sleeve, one side of the expansion block is connected to the side wall of the expansion portion, and the remaining edge of the expansion block is separated from the side wall of the expansion portion.

Optionally, the inner hole of the expansion portion gradually shrinks along the pushing direction of the movable block.

Optionally, a first guiding inclined surface is provided in a region of the outer surface of the front portion of the movable block corresponding to the inner side wall of the expansion block, and a second guiding inclined surface is correspondingly provided on the inner side wall of the expansion block.

Optionally, it also includes an embedded part, the rear end of the connecting rod is provided with a positioning connector for connecting to the embedded part, the interior of the embedded part has a accommodating cavity for accommodating the positioning connector, the front end of the accommodating cavity is provided with a front panel for clamping the positioning connector, and the front panel is provided with a positioning hole, which is composed of a large hole and a small hole. The large hole can be used for the positioning connector to pass through, and the aperture of the small hole is adapted to the diameter of the connecting rod.

Optionally, the outer side wall of the embedded part is provided with textures for increasing friction.

Optionally, a guide plate is provided in the accommodating cavity of the embedded part, and the guide plate extends inwardly from a side of the large hole away from the small hole toward the direction of the small hole.

After adopting the above structure, the advantages of the present invention compared with the prior art are: when the present invention installs the expansion connector on the layer board, it is only necessary to press the positioning connector at the rear end of the connecting rod to push the connecting rod forward, so that the movable block moves forward, and the expansion part radially expands and tightens on the layer board. No tools such as screwdrivers are required, and it is easy to install; the connecting rod is resiliently designed to facilitate the installation of the layer board connected to the two side panels between the two vertical side panels.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of an expansion connector and an embedded component according to an embodiment of the present invention;

FIG2 is a schematic cross-sectional view of an expansion connector according to an embodiment of the present invention;

FIG3 is an exploded schematic diagram of an expansion connector according to an embodiment of the present invention;

FIG4 is a cross-sectional schematic diagram of the expansion portion of the expansion connector according to the first embodiment of the present invention expanding in the radial direction; FIG5 is an installation schematic diagram 1 of the expansion connector according to the first embodiment of the present invention;

FIG6 is a schematic diagram 2 of the installation of an expansion connector according to an embodiment of the present invention;

FIG. 7 is a schematic diagram 3 of the installation of an expansion connector according to an embodiment of the present invention.

DETAILED DESCRIPTION

The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Embodiment 1, referring to Figures 1 to 7, the expansion connection provided by the present invention includes an expansion sleeve 1, a movable block 4, a compression spring 5 and a connecting rod 2. The expansion sleeve 1 is a hollow cylindrical structure, which has an inner hole 10 extending in the axial direction. The movable block 4, the compression spring 5 and the connecting rod 2 are arranged in the expansion sleeve 1. The expansion sleeve 1 is provided with an expansion portion 11 that can expand radially outward. The movable block 4 is correspondingly arranged at the inner hole of the expansion portion 11. The front end of the connecting rod 2 abuts against the movable block 4, and the rear end of the connecting rod 2 extends out of the expansion sleeve 1. The inner side wall of the expansion sleeve 1 is sequentially provided with a first limiting boss 101 and a second limiting boss 102 along the axial direction. An annular stop portion 20 is convexly provided on the middle part of the connecting rod, and the stop portion 20 is located between the first limiting boss 101 and the second limiting boss 102. The compression spring 5 is sleeved outside the connecting rod and is placed between the first limiting boss 101 and the stop portion 20. The second limiting boss 102 is used to limit the stop portion 20 to prevent the connecting rod 2 from popping out backwards under the action of the compression spring 5 .

4 , applying an inward operating force to the rear end of the connecting rod can move the connecting rod 2 forward, and the rear end of the connecting rod 2 is hidden in the inner hole 10 of the expansion sleeve 1. The connecting rod 2 moves forward to push the movable block 4 forward, and the movable block 4 causes the expansion portion 2 to expand radially outward to tighten the wooden board. After the connecting rod 2 is released, under the action of the restoring force of the compression spring 5, the rear end of the connecting rod 2 can move backward and extend out of the expansion sleeve 1.

The expansion sleeve comprises two matched first bodies 1a and second bodies 1b, which are engaged or separated with each other through a locking structure. The first body 1a and/or the second body 1b are provided with a positioning hole 12, and the second body 1b and/or the first body 1a are correspondingly provided with a positioning cog 13 matched with the positioning hole 12, and the end of the positioning cog 13 is hook-shaped, and the end of the positioning cog 13 is embedded in the positioning hole 12 to connect the first body 1a and the second body 1b as a whole.

The expansion portion 11 is provided with at least one expansion block 110 capable of expanding outward, the expansion block 110 extends along the axial direction of the expansion sleeve 1, one side of the expansion block 110 is connected to the side wall of the expansion portion 11, and the remaining edges of the expansion block 110 are separated from the side wall of the expansion portion 11. In this embodiment, the number of the expansion blocks 110 is 4, and the number of the expansion blocks 110 can also be set to 1, 2, 3 or other suitable numbers. The outer wall of the expansion block 110 is provided with a pattern for increasing surface friction to increase friction.

The inner hole of the expansion part 11 is set as a variable diameter hole that gradually shrinks along the pushing direction of the movable block 4. The outer surface of the front part of the movable block 4 and the area corresponding to the position of the expansion block 110 are provided with a first guide bevel 40, and the inner wall of the expansion block 110 is correspondingly provided with a second guide bevel 111. The first guide bevel 40 and the second guide bevel 111 make it easy for the movable block 4 to be pushed forward, and at the same time make it easy for the expansion block 110 to expand radially.

In the preferred implementation of this embodiment, an embedded part 3 is also included, and a positioning connector 21 for connecting with the embedded part 3 is provided at the rear end of the connecting rod 2. The embedded part 3 has a receiving cavity for accommodating the positioning connector 21, and a front panel 31 for clamping the positioning connector 21 is provided at the front end of the receiving cavity. A positioning hole is provided on the front panel 31, and the positioning hole is composed of a large hole 302 and a small hole 301. The large hole 302 can be used for the positioning connector 21 to pass through, and the aperture of the small hole 301 is adapted to the diameter of the connecting rod 2. During installation, the positioning connector 21 is extended into the cavity through the large hole 302, and the connecting rod 2 is moved from the large hole 302 to the small hole 301 so that the positioning connector 21 is clamped at the front panel 31 of the embedded part 3. Obviously, even without the embedded part 3, it is feasible to directly connect the rear end of the connecting rod 2 with the mounting hole of the side panel 01. The cooperation between the embedded part 3 and the positioning connector 21 can increase the stability of the side panel 01 and the layer plate 02.

In a further technical solution, the outer side wall of the embedded part 3 is provided with a pattern 33 for increasing friction.

A guide plate 303 is provided in the accommodation cavity of the embedded part 3, and the guide plate 303 extends obliquely inward from one side of the large hole 302 away from the small hole 301 toward the direction of the small hole 301. The guide plate 303 is provided to guide the positioning connector 21 when it is inserted into the embedded part 3, and to help the positioning connector 21 rebound when it is removed from the embedded part 3, so that it is easy to install and disassemble, and can be disassembled and assembled multiple times.

5 and 6, the installation process of the expansion connector of the present invention is as follows:

1. Pre-drill holes on the side panel 01 and the layer panel 02;

2. Knock the embedded part 3 into the installation hole on the side plate 01, put the expansion connector into the layer plate 02, press the positioning connector 21 inward, the connecting rod 2 pushes the movable block 4 forward, and the expansion part of the expansion sleeve expands the wooden board;

3. Move the layer plate 02 with the expansion connector installed close to the side plate 01, align the positioning connector with the large hole of the embedded part 3, move the layer plate 02 forward along the side plate 01, and slide the positioning connector from the large hole to the small hole along the guide plate 303, so that the positioning connector 21 of the connecting rod is stuck in the front panel of the embedded part 3, and then the layer plate 02 can be installed on the side plate 01.

Referring to FIG7 , when a layer board 02 needs to be installed between two side boards 01, first install the expansion connectors in the installation holes on both sides of the layer board 02, place the layer board 02 horizontally, align the connecting rod of the expansion connector with the embedded parts on the side board 01, and push the layer board 02 flatly between the two side boards 01. The connecting rod 2 is designed to be resilient so that the layer board 02 can pass through without obstacles, and the positioning connector of the connecting rod is stuck in the embedded parts, so that the layer board 02 is installed and fixed between the two side boards 01. When disassembly is required, the connecting rod 2 can rebound under the action of the guide plate 303, so that the layer board 02 can be taken out without obstacles, and it can be disassembled and assembled repeatedly.

The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims (7)

1. The expansion connecting piece comprises an expansion sleeve, a movable block, a compression spring and a connecting rod, wherein the expansion sleeve is of a hollow cylinder structure, the expansion sleeve is provided with an inner hole extending along the axial direction, the movable block, the compression spring and the connecting rod are arranged in the expansion sleeve, an expansion part capable of expanding outwards in the radial direction is arranged on the expansion sleeve, the movable block is correspondingly arranged at the inner hole of the expansion part, the front end of the connecting rod is abutted against the movable block, the rear end part of the connecting rod extends out of the expansion sleeve, a first limit boss and a second limit boss are sequentially arranged on the inner side wall of the expansion sleeve along the axial direction, a stop part is convexly arranged at the middle part of the connecting rod, the stop part is arranged between the first limit boss and the second limit boss, the compression spring is sleeved outside the connecting rod and is arranged between the first limit boss and the stop part,

The rear end of the connecting rod can be moved forwards by applying inward operating force to the rear end of the connecting rod, the rear end of the connecting rod is hidden in the inner hole of the expansion sleeve, the connecting rod moves forwards to push the movable block to move forwards, the movable block enables the expansion part to expand outwards in radial direction,

The embedded part is characterized by further comprising an embedded part, the rear end of the connecting rod is provided with a positioning connector for being connected with the embedded part, the inside of the embedded part is provided with a containing cavity for containing the positioning connector, the front end of the containing cavity is provided with a front panel for clamping the positioning connector, the front panel is provided with a positioning hole which is formed by a large hole and a small hole in a penetrating way, the large hole can be used for the positioning connector to pass through, the aperture of the small hole is matched with the diameter of the connecting rod,

The outer side wall of the embedded part is provided with lines for increasing friction.

2. The expansion joint of claim 1, wherein the expansion sleeve comprises two apposed first and second bodies that are engaged or disengaged with each other by a locking mechanism.

3. The expansion joint according to claim 2, wherein the first body and/or the second body are/is provided with a positioning hole, the second body and/or the first body are/is provided with positioning cog teeth corresponding to the positioning hole, the end parts of the positioning cog teeth are hook-shaped, and the end parts of the positioning cog teeth are embedded into the positioning hole to connect the first body and the second body into a whole.

4. An expansion joint according to claim 1, wherein the expansion part is provided with at least one expansion block which can be expanded outwards, the expansion block extending in the axial direction of the expansion sleeve, one side of the expansion block being connected to the side wall of the expansion part, the remaining edges of the expansion block being separated from the side wall of the expansion part.

5. The expansion joint according to claim 4, wherein the inner hole of the expansion portion is gradually narrowed in the pushing-in direction of the movable block.

6. The expansion joint according to claim 5, wherein the outer surface of the front portion of the movable block is provided with a first guide slope in a region corresponding to the inner side wall of the expansion block, and the inner side wall of the expansion block is provided with a second guide slope.

7. The expansion joint of claim 1, wherein a guide plate is disposed in the receiving cavity of the embedded part, the guide plate extending obliquely inward from a side of the large hole remote from the small hole toward the small hole.