CN210423325U

CN210423325U - Expansion connecting piece

Info

Publication number: CN210423325U
Application number: CN201920929298.2U
Authority: CN
Inventors: 刘韦明
Original assignee: Guangzhou Huadu Le Sifu Technology Co ltd
Current assignee: Guangzhou Huadu Le Sifu Technology Co ltd
Priority date: 2019-06-19
Filing date: 2019-06-19
Publication date: 2020-04-28
Anticipated expiration: 2029-06-19

Abstract

The utility model discloses an expansion connector, including lifting screw, nut and expansion sleeve, expansion sleeve is equipped with inflation portion and regulating part, lifting screw includes screw rod and head, the nut cover is on the screw rod, nut and lifting screw set up inside the inflation cover, the nut sets up in the inflation portion, thereby the nut makes inflation portion expand or shrink to reset along the axial relative sliding with inflation portion, the regulating part is equipped with the holding chamber that is used for holding lifting screw's head, be equipped with radial regulation hole on the lateral wall of regulating part, the holding chamber is linked together with the regulation hole, be equipped with the teeth of a cogwheel along axial extension on the terminal surface of lifting screw's head, the teeth of a cogwheel sets up along the even interval of circumference of head, form the tooth's socket between two adjacent teeth of a cogwheel. Compared with the prior art, the utility model the advantage that has is: simple structure, easy installation, repeated disassembly and assembly.

Description

Expansion connecting piece

Technical Field

The utility model relates to a fastener technical field especially relates to an expansion connection spare.

Background

The eccentric connecting piece for connecting the panel furniture in the prior art generally comprises an eccentric wheel, a connecting rod and an embedded nut, is also called a three-in-one connecting piece and can be used for connecting a side plate (a plate in the vertical direction) and a laminated plate (a plate in the horizontal direction), but the eccentric connecting piece has more parts and is complex to install.

There is a need for improvement.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an expansion connector which has simple structure and is easy to install.

In order to realize the purpose, the following technical scheme is provided:

an expansion connecting piece is characterized by comprising a lifting screw, a nut and an expansion sleeve, wherein the expansion sleeve is of a hollow barrel structure, an expansion part and an adjusting part are sequentially arranged along the axial direction of the expansion sleeve, the lifting screw comprises a screw and a head connected to the first end of the screw, an external thread is arranged on the screw, an internal thread matched with the external thread of the screw is arranged on the nut, the nut is sleeved on the screw, the nut and the lifting screw are arranged inside the expansion sleeve, the nut is arranged in the expansion part, the nut and the expansion part slide relatively along the axial direction so as to expand or contract the expansion part to reset, the adjusting part is provided with an accommodating cavity for accommodating the head of the lifting screw, the side wall of the adjusting part is provided with radial adjusting holes, the accommodating cavity is communicated with the adjusting holes, gear teeth extending along the axial direction are arranged on the end face of the head of the lifting screw, a tooth socket is formed between two adjacent gear teeth.

Preferably, the expansion sleeve comprises a first body and a second body which are oppositely closed, the first body is provided with at least one positioning hole, the second body is provided with a positioning column matched with the positioning hole, and the positioning column is embedded into the positioning hole to connect the first body and the second body into a whole.

Preferably, the outer side wall of the expansion casing is further provided with a positioning plate.

Preferably, the middle part of the positioning plate is provided with a limiting hole.

Preferably, the expansion part is provided with at least one expansion block capable of expanding outward, one end of the expansion block is connected with the side wall of the expansion part, the other opposite end is separated from the side wall of the first expansion part, and the expansion block extends along the axial direction of the expansion sleeve.

Preferably, the outer wall of the expansion block is provided with lines for increasing the surface friction force.

Preferably, the outer surface of the nut is provided with an ejecting part for expanding the expansion part, the ejecting part is provided with an ejecting surface, and the shape of the inner hole of the expansion part is matched with the shape of the ejecting surface.

Preferably, the pushing surface comprises a cylindrical surface and a conical surface with gradually enlarged diameter, the cylindrical surface is connected with one end with the largest diameter of the conical surface, the inner hole of the expansion part comprises a cylindrical hole and a conical hole with gradually enlarged diameter, the cylindrical hole is connected with one end with the largest aperture of the conical hole, and the outer surface of the nut and the inner wall of the expansion part slide relatively to each other so as to expand or contract the expansion part for resetting.

Preferably, the outer surface of the nut is further provided with a limiting strip extending along the axial direction, the inner hole wall of the expansion part is provided with a limiting groove matched with the limiting strip, and the limiting strip is embedded into the limiting groove.

Preferably, the expansion connecting piece further comprises an embedded nut, an inner hole of the embedded nut is provided with an inner thread matched with the screw rod, and the embedded nut is in threaded connection with the second end of the screw rod.

Preferably, the inner hole of the embedded nut is a stepped hole, the stepped hole comprises a hexagonal hole and a threaded hole arranged at the rear end of the hexagonal hole, and the diameter of the hexagonal hole is larger than that of the threaded hole.

After the structure is adopted, compared with the prior art, the utility model the advantage that has is: the utility model discloses simple structure, the installation is easy, can relapse a lot of dismouting.

Drawings

FIG. 1 is an overall structure diagram of the expansion connector of the present invention;

fig. 2 is an exploded view of the expansion joint of the present invention;

fig. 3 is an exploded view of the expansion sleeve and nut of the expansion joint of the present invention;

fig. 4 is a schematic view of the installation of the expansion joint of the present invention;

fig. 5 is a schematic sectional structure diagram of the expansion connector of the present invention before and after expansion.

Detailed Description

Embodiments of the present invention will be described in further detail with reference to the accompanying drawings.

Embodiment one, refer to fig. 1 to 5, the expansion connector provided by the present invention includes a lifting screw 2, a nut and an expansion sleeve 1, the expansion sleeve 1 is a hollow cylindrical structure, an expansion portion 12 and an adjusting portion 13 are sequentially disposed along an axial direction of the expansion sleeve 1, the lifting screw 2 includes a screw 22 and a head portion 21 connected to a first end of the screw, the screw 22 is provided with an external thread, the nut 3 is provided with an internal thread matching the external thread of the screw 22, the nut 3 is sleeved on the screw 22, the nut 3 and the lifting screw 2 are disposed inside the expansion sleeve 1, the nut 3 is disposed in the expansion portion 12, the nut 3 and the expansion portion 12 slide relatively along the axial direction to expand or contract the expansion portion 12 for resetting, a cylindrical accommodating cavity 131 is disposed in the adjusting portion 13, the head portion 21 of the lifting screw 2 is disposed in the accommodating cavity 131, a radial adjusting hole 130 is disposed on a side wall of the adjusting portion, the cylindrical accommodating cavity 131 is communicated with the adjusting hole 130, gear teeth 211 extending along the axial direction are arranged on the end face of the head 21 of the lifting screw, the gear teeth 211 are uniformly arranged at intervals along the circumferential direction of the head 21, a gear groove 210 is formed between every two adjacent gear teeth 211, the gear groove 210 is used for being meshed with the screwdriver head of the cross screwdriver, the cross screwdriver head extends into the adjusting hole 130, and when the screwdriver is twisted, the head 21 of the screw rotates along with the cross screwdriver head, namely, the longitudinal rotation of the cross screwdriver head is converted into the transverse rotation of the lifting screw 2. The lifting screw 2 is rotated to move the nut 3 and the second nut 4 away from the head 21 of the lifting screw, and the expansion part 12 is radially expanded by the nut 3.

The expansion connecting piece further comprises an embedded nut 8 which is used for being installed in the installation hole of the side plate 01, an inner hole of the embedded nut 8 is provided with an inner thread 81 matched with the screw rod 22, and the embedded nut 8 is in threaded connection with the second end of the screw rod 22. The second end of the screw rod 22 is connected with the embedded nut 8, so that the installed laminate 02 and the installed laminate 01 are more stable. In addition, the nut 8 does not need to be embedded, and the second end of the screw rod 22 can be directly inserted into the mounting hole of the side plate 01, so that the laminated plate 02 can be conveniently taken down from the side plate 01.

The outer surface of the embedded nut 8 is provided with lines for increasing friction.

The embedded nut 8 is provided with the external screw thread 83 that is used for being connected with the curb plate 01, and the hole of embedded nut 8 is the shoulder hole, and the shoulder hole includes hexagon 82 and sets up the screw hole 81 in hexagon 82 rear end, and the diameter of hexagon 82 is greater than the diameter of screw hole 81. The hexagonal hole 82 is used for screwing the embedded nut 8 into the side plate 01, and the threaded hole 81 is used for being connected with the second end of the screw rod 22.

The expansion sleeve 1 comprises a first body 1a and a second body 1b which are oppositely combined, at least one positioning hole 16 is arranged on the first body 1a, a positioning column 15 matched with the positioning hole is arranged on the second body 1b, and the positioning column 15 is embedded into the positioning hole 16 to enable the first body 1a and the second body 1b to be connected into a whole.

The lateral wall of expansion sleeve 1 still is equipped with locating plate 17, and when inserting expansion joint spare into the mounting hole of plywood 02, locating plate 17 and plywood 02 (or curb plate 01) the constant head tank 010 cooperation of mounting hole front end prevent that expansion joint spare's expansion sleeve 1 from taking place to deflect. The positioning plate 17 is semicircular, and a limiting hole 170 is formed in the middle of the positioning plate 17. The limiting holes 170 can be matched with screws to lock the expansion connecting piece on the laminate 02 or the side plate 01.

The expansion part 12 is provided with at least one expansion block 121 capable of expanding outward, one end of the expansion block 121 is connected to a side wall of the expansion part 12, and the other opposite end thereof is separated from the side wall of the expansion part 12, and the expansion block 121 extends in the axial direction of the expansion casing 1. In the present embodiment, the number of expansion blocks 121 is 4. The outer wall of the expansion block 121 is provided with lines for increasing the surface friction force to increase the friction force.

The outer surface of the nut 3 is provided with an annular pushing part for expanding the expansion part, the pushing part is provided with a pushing surface 31, and the shape of the inner hole of the expansion part 12 is matched with the shape of the pushing surface 31.

The pushing surface 31 comprises a cylindrical surface 312 and a conical surface 311 with a gradually enlarged diameter, the cylindrical surface 311 is connected with one end with the largest diameter of the conical surface 311, the inner hole of the expansion part 12 comprises a cylindrical hole 1202 and a conical hole 1201 with the gradually enlarged diameter, the cylindrical hole 1102 is connected with one end with the largest diameter of the conical hole 1101, and the outer surface of the nut 3 and the inner wall of the expansion part 12 slide relatively to each other so as to expand or contract the expansion part 12 for resetting.

The shape of the pushing surface 31 may be a circular arc surface or other suitable shape, besides the combination of the cylindrical surface and the conical surface as in the present embodiment.

The outer surface of the nut 3 is further provided with a limiting strip 313 extending along the axial direction, the inner hole wall of the first expansion part is provided with a limiting groove 1203 matched with the limiting strip 313, the limiting strip 313 is embedded into the limiting groove 1203, and the limiting strip 313 can prevent the nut 3 and the expansion sleeve 1 from radially deflecting.

The assembly method of the expansion connector comprises the following steps:

the nut 3 is sleeved on the lifting screw rod 2, the lifting screw rod 2 provided with the nut 3 is placed in an inner hole of the first body 1a (or the second body 1b) of the expansion sleeve, the second body 1b and the first body 1a are aligned and spliced, the positioning column 15 is embedded into the positioning hole 16, the end part of the positioning column 15 is upset to form a nail head by using a riveting machine, and the first body 1a and the second body 1b are riveted into a whole.

The method of use of the expansion joint is as follows:

(1) respectively processing corresponding mounting holes on a furniture side plate (a plate in the vertical direction) 01 and a furniture laminate (a plate in the horizontal direction) 02;

(2) screwing the embedded nut 8 into the mounting hole of the side plate 01;

(3) inserting the adjusting part 13 of the expansion connecting piece into the mounting hole of the laminate 02, and embedding the positioning plate 17 into the positioning groove 010 at the front end of the mounting hole of the laminate 02;

(4) the second end of the screw rod 22 of the expansion connecting piece is inserted into the threaded hole of the embedded nut 8 in an aligning mode, the cross head of the screwdriver is stretched into the adjusting hole 130 by the aid of a screwdriver, the cross head of the screwdriver is screwed, the lifting screw rod 2 is driven to rotate, the nut 3 moves towards the head 21 far away from the lifting screw rod due to rotation of the lifting screw rod 2, the expansion part 12 expands radially under the action of the nut 3, the free end of the expansion block 121 expands outwards, the expansion connecting piece is locked in the mounting hole of the laminate 02, meanwhile, the lifting screw rod 2 rotates, the second end of the lifting screw rod 2 is in threaded fit with the threaded hole 81 of the embedded nut, the second end of the screw rod 22 is screwed into the embedded nut 8, and the laminate 02 is fixed on the side plate 01.

When the lifting screw 2 reversely rotates, the nut 3 moves towards the head 21 of the lifting screw, so that the first expansion part 11 and the second expansion part 12 are contracted and reset, meanwhile, the second end of the screw 22 leaves the embedded nut 8, and the expansion connecting piece and the laminate 02 can be repeatedly disassembled and assembled.

The utility model has the advantages that: the expansion connecting piece of the utility model is of a two-piece structure, when in installation, a cross screwdriver is used for stretching into the laminated board from the installation hole, and the expansion connecting piece can be locked with the laminated board 02 and the side plate 01 by twisting the cross screwdriver, so that the installation is convenient and fast, and the furniture splicing is firm and reliable; the expansion connecting piece is hidden inside the side plate and the laminate, so that the furniture is attractive in assembly and can be repeatedly disassembled and assembled.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. An expansion connecting piece is characterized by comprising a lifting screw, a nut and an expansion sleeve, wherein the expansion sleeve is of a hollow barrel structure, an expansion part and an adjusting part are sequentially arranged along the axial direction of the expansion sleeve, the lifting screw comprises a screw and a head connected to the first end of the screw, an external thread is arranged on the screw, an internal thread matched with the external thread of the screw is arranged on the nut, the nut is sleeved on the screw, the nut and the lifting screw are arranged inside the expansion sleeve, the nut is arranged in the expansion part, the nut and the expansion part slide relatively along the axial direction so as to expand or contract the expansion part to reset, the adjusting part is provided with an accommodating cavity for accommodating the head of the lifting screw, the side wall of the adjusting part is provided with radial adjusting holes, the accommodating cavity is communicated with the adjusting holes, gear teeth extending along the axial direction are arranged on the end face of the head of the lifting screw, a tooth socket is formed between two adjacent gear teeth.

2. The expansion joint as claimed in claim 1, wherein the expansion sleeve comprises a first body and a second body which are coupled together, the first body is provided with at least one positioning hole, the second body is provided with a positioning post which is matched with the positioning hole, and the positioning post is inserted into the positioning hole to connect the first body and the second body into a whole.

3. The expansion joint according to claim 1, wherein the outer sidewall of the expansion sleeve is further provided with a positioning plate.

4. Expansion joint according to claim 1, characterized in that the expansion part is provided with at least one outwardly expandable expansion block, which expansion block is connected at one end to the side wall of the expansion part and at the opposite end is separated from the side wall of the first expansion part, the expansion block extending in the axial direction of the expansion sleeve.

5. The expansion joint as claimed in claim 4, wherein the outer wall of the expansion block is provided with a texture for increasing the surface friction.

6. The expansion joint according to any of claims 1-5, wherein the outer surface of the nut is provided with a pushing portion for spreading the expansion portion, the pushing portion having a pushing surface, and the shape of the inner hole of the expansion portion matches the shape of the pushing surface.

7. The expansion joint as claimed in claim 6, wherein the pushing surface comprises a cylindrical surface and a tapered surface with a gradually increasing diameter, the cylindrical surface is connected with the end with the largest diameter of the tapered surface, the inner hole of the expansion part comprises a cylindrical hole and a tapered hole with a gradually increasing diameter, the cylindrical hole is connected with the end with the largest diameter of the tapered hole, and the outer surface of the nut slides relative to the inner wall of the expansion part so as to expand or contract the expansion part for resetting.

8. The expansion joint as claimed in any one of claims 1-5, wherein the outer surface of the nut is further provided with a limit strip extending in the axial direction, the inner hole wall of the expansion part is provided with a limit groove matched with the limit strip, and the limit strip is embedded in the limit groove.

9. The expansion joint as claimed in any one of claims 1 to 5, further comprising a pre-embedded nut, wherein the inner hole of the pre-embedded nut is provided with an internal thread matched with the screw, and the pre-embedded nut is in threaded connection with the second end of the screw.

10. The expansion connector as claimed in claim 9, wherein the inner hole of the embedded nut is a stepped hole, the stepped hole comprises a hexagonal hole and a threaded hole provided at a rear end of the hexagonal hole, and a diameter of the hexagonal hole is larger than that of the threaded hole.