CN210034090U - Expansion connecting piece - Google Patents
Expansion connecting piece Download PDFInfo
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- CN210034090U CN210034090U CN201920929297.8U CN201920929297U CN210034090U CN 210034090 U CN210034090 U CN 210034090U CN 201920929297 U CN201920929297 U CN 201920929297U CN 210034090 U CN210034090 U CN 210034090U
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- expansion part
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Abstract
The utility model discloses an expansion connecting piece, which comprises a lifting screw rod, a first nut, a second nut and an expansion sleeve, wherein the expansion sleeve is provided with a first expansion part, second inflation portion and regulation portion, the lifting screw includes screw rod and head, first nut, the second nut cover is on the screw rod, first nut sets up in first inflation portion, the second nut sets up in the second inflation portion, thereby first nut makes first inflation portion expand or shrink and resets along axial displacement, thereby the second nut makes second inflation portion expand or shrink and resets along axial displacement, the head setting of lifting screw is in the holding intracavity of regulation portion, be equipped with radial regulation hole on the lateral wall of regulation portion, the holding chamber is linked together with the regulation hole, be equipped with along axially extended's the teeth of a cogwheel 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
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
Not enough to prior art exists, the utility model aims to provide a simple structure installs easy expansion joint spare.
In order to realize the purpose, the following technical scheme is provided:
an expansion connecting piece is characterized by comprising a lifting screw, a first nut, a second nut and an expansion sleeve, wherein the expansion sleeve is of a hollow barrel structure, a first expansion part, a second 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 one end of the screw, the first nut and the second nut are sleeved on the screw, the first nut, the second nut and the lifting screw are arranged in the expansion sleeve, the first nut is arranged in the first expansion part, the second nut is arranged in the second expansion part, the first nut and the first expansion part slide relatively along the axial direction so as to expand or contract and reset the first expansion part, the second nut and the second expansion part slide relatively along the axial direction so as to expand or contract and reset the second expansion part, the adjusting part is provided with an accommodating cavity for accommodating the head of the lifting screw, and a radial adjusting hole is formed in the side wall of the adjusting part, the accommodating cavity is communicated with the adjusting hole, gear teeth extending along the axial direction are arranged on the end face of the head of the lifting screw rod, the gear teeth are uniformly arranged along the circumferential direction of the head at intervals, and a tooth groove is formed between every 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, an expansion part is arranged between the first expansion part and the second expansion part, and the expansion part is in a bellows shape.
Preferably, the first expansion part is provided with at least one expansion block capable of expanding outwards, one end of the expansion block is connected with the side wall of the first expansion part, the other opposite end of the expansion block is separated from the side wall of the first expansion part, the expansion block extends along the axial direction of the expansion sleeve, the second expansion part is provided with at least one expansion block capable of expanding outwards, one end of the expansion block is connected with the side wall of the second expansion part, the other opposite end of the expansion block is separated from the side wall of the second 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 first nut is provided with a pushing part for pushing the first expansion part open, the pushing part is provided with a pushing surface, the shape of the inner hole of the first expansion part is matched with that of the pushing surface, the outer surface of the second nut is provided with a pushing part for pushing the second expansion part open, the pushing part is provided with a pushing surface, and the shape of the inner hole of the second expansion part is matched with that of the pushing surface.
Preferably, the pushing surface of the first nut 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 first 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 diameter of the conical hole, the outer surface of the first nut slides relative to the inner wall of the first expansion part so as to expand or contract the expansion part for restoration,
the pushing surface of the second nut comprises a cylindrical surface and a conical surface with gradually enlarged diameter, the cylindrical surface is connected with the end with the largest diameter of the conical surface, the inner hole of the second expansion part comprises a cylindrical hole and a conical hole with gradually enlarged diameter, the cylindrical hole is connected with the end with the largest diameter of the conical hole, and the outer surface of the second nut and the inner wall of the second expansion part slide relatively so that the expansion part expands or contracts to reset.
Preferably, the surface of the first nut is further provided with a limiting strip extending along the axial direction, the inner hole wall of the first expansion part is provided with a limiting groove matched with the limiting strip, the limiting strip is embedded into the limiting groove, the surface of the second nut is further provided with a limiting strip extending along the axial direction, the inner hole wall of the second expansion part is provided with a limiting groove matched with the limiting strip, and the limiting strip is embedded into the limiting groove.
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 assembly schematic view of the expansion joint of the present invention;
fig. 3 is an exploded view of the expansion joint of the present invention;
fig. 4 is an exploded view of the expansion sleeve and nut of the expansion joint of the present invention;
fig. 5 is a schematic sectional structure view of the expansion joint of the present invention before and after expansion;
fig. 6 is a schematic view of the installation of the expansion joint of the present invention 1;
fig. 7 is an installation schematic diagram 2 of the expansion connector of the present invention.
Detailed Description
Embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
Embodiment one, referring to fig. 1 to 7, the expansion joint provided by the present invention includes a lifting screw 2, a first nut 3, a second nut 4 and an expansion sleeve 1, wherein the expansion sleeve 1 is a hollow cylindrical structure, a first expansion portion 11, a second 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 one end of the screw, the screw 22 is provided with an external thread, the first nut 3 and the second nut 4 are provided with an internal thread matching the external thread of the screw 22, the first nut 3 and the second nut 4 are in threaded connection with the screw 22, the first nut 3 and the second nut 4 are sleeved on the screw 22, the first nut 3, the second nut 4 and the lifting screw 2 are disposed inside the expansion sleeve 1, the first nut 3 is disposed in the first expansion portion 11, the second nut 4 is disposed in the second expansion portion 12, the first nut 3 and the first expansion part 11 relatively slide along the axial direction so as to expand or contract the first expansion part 11 for resetting, the second nut 4 and the second expansion part 12 relatively slide along the axial direction so as to expand or contract the second expansion part 12 for resetting, a cylindrical accommodating cavity 131 is arranged in the adjusting part 13, the head part 21 of the lifting screw 2 is arranged in the accommodating cavity 131, the side wall of the adjusting part 13 is provided with a radial adjusting hole 130, the accommodating cavity 131 is communicated with the adjusting hole 130, the end surface of the head part 21 of the lifting screw is provided with gear teeth 211 extending along the axial direction, the gear teeth 211 are uniformly arranged at intervals along the circumferential direction of the head part 21, a gear groove 210 is formed between two adjacent gear teeth 211, the gear groove 210 is used for being meshed with the screwdriver bit of the cross screwdriver, the cross bit is inserted from the adjusting hole 130, when the screwdriver is twisted, the head 21 of the screw rotates with the cross bit, i.e. the longitudinal rotation of the cross bit is converted into the transverse rotation of the lifting screw 2. The rotation of the lifting screw 2 causes the first nut 3 and the second nut 4 to move toward the head 21 of the lifting screw, the first expansion portion 11 to radially expand by the first nut 3, and the second expansion portion 12 to radially expand by the second nut 4.
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 curb plate 01, locating plate 17 and the constant head tank 010 cooperation of curb plate 01 (or plywood 02) mounting hole front end prevent that expansion joint spare's expansion sleeve 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 side plate 01 or the laminate 02.
An expansion part 14 is arranged between the first expansion part 11 and the second expansion part 12, and the expansion part 14 is in a corrugated pipe shape. When the expansion connecting piece is used for locking the side plate 01 and the laminate 02, the expansion part 14 plays a role of tensioning the two wood plates and prevents shaking.
The first expansion part 11 is provided with at least one first expansion block 111 capable of expanding outward, one end of the first expansion block 111 is connected to a side wall of the first expansion part, and the other opposite end thereof is separated from the side wall of the first expansion part, and the first expansion block 111 extends in the axial direction of the expansion casing 1. In the present embodiment, the number of the first expansion blocks 111 is 4. The outer wall of the first expansion block 111 is provided with lines for increasing the surface friction force to increase the friction force.
The second expansion part 12 is provided with at least one second expansion block 121 capable of expanding outward, one end of the second expansion block 121 is connected to a side wall of the second expansion part 12, and the other opposite end thereof is separated from the side wall of the second expansion part 12, and the second expansion block 121 extends in the axial direction of the expansion sleeve 1. In the present embodiment, the number of the second expansion blocks 121 is 4. The outer wall of the second expansion block 121 is provided with lines for increasing the surface friction force to increase the friction force.
The outer surface of the first nut 3 is provided with an annular pushing part for expanding the first expansion part 11, the pushing part is provided with a pushing surface 31, and the shape of the inner hole of the first expansion part 11 is matched with the shape of the pushing surface 31.
The pushing surface of the first nut 3 comprises a cylindrical surface 312 and a tapered surface 311 with a gradually enlarged diameter, the cylindrical surface 311 is connected with one end with the largest diameter of the tapered surface 311, the inner hole of the first expansion part 11 comprises a cylindrical hole 1102 and a tapered hole 1101 with the gradually enlarged diameter, the cylindrical hole 1102 is connected with one end with the largest diameter of the tapered hole 1101, and the outer surface of the first nut 3 slides relative to the inner wall of the first expansion part 11 so as to expand or contract the first expansion part 11 for resetting.
The outer surface of the second nut 4 is provided with an annular pushing part for expanding the second expansion part 12, the pushing part is provided with a pushing surface 41, and the shape of the inner hole of the second expansion part 12 is matched with the shape of the pushing surface 41.
The pushing surface 41 of the second nut 4 comprises a cylindrical surface 412 and a conical surface 411 with a gradually enlarged diameter, the cylindrical surface 412 is connected with one end with the largest diameter of the conical surface 411, the inner hole of the second expansion part 12 comprises a cylindrical hole 1202 and a conical hole 1201 with the gradually enlarged diameter, the cylindrical hole 1202 is connected with one end with the largest diameter of the conical hole 1201, and the outer surface of the second nut 4 slides relative to the inner wall of the second expansion part 12 so as to expand or contract the second expansion part 12 for resetting.
The shapes of the pushing surface 31 and the pushing surface 41 may be circular arc surfaces or other suitable shapes, besides the combination of the cylindrical surface and the conical surface as in the present embodiment.
The outer surface of the first 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 1103 matched with the limiting strip 313, the limiting strip 313 is embedded into the limiting groove 1103, and the limiting strip 313 can prevent the second nut 3 and the expansion sleeve 1 from radially deflecting.
The outer surface of the second nut 4 is also provided with a limiting strip 413 extending along the axial direction, the inner hole wall of the second expansion part 12 is provided with a limiting groove 1203 matched with the limiting strip 413, the limiting strip 413 is embedded into the limiting groove 1203, and the limiting strip 413 can prevent the second nut 4 and the expansion sleeve 1 from radially deflecting.
The assembly method of the expansion connector comprises the following steps:
sleeving a first nut 3 and a second nut 4 on a lifting screw rod 2, placing the lifting screw rod 2 provided with the first nut 3 and the second nut 4 into an inner hole of a first body 1a (or a second body 1b) of an expansion sleeve, aligning and splicing the second body 1b and the first body 1a, embedding a positioning column 15 into a positioning hole 16, upsetting the end part of the positioning column 15 to form a nail head by using a riveting machine, and riveting the first body 1a and the second body 1b 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) inserting a first expansion part 11 of an expansion connecting piece into a mounting hole of a side plate 01, embedding a positioning plate 17 into a positioning groove 010 at the front end of the mounting hole of the side plate 01, inserting the mounting hole of a laminate 02 into one end of an adjusting part 13, extending a cross head of a screwdriver from an adjusting hole 130 by using a screwdriver, screwing the cross head of a screwdriver, driving a lifting screw 2 to rotate, enabling a first nut 3 and a second nut 4 to move towards a head part 21 of the lifting screw by the rotation of the lifting screw 2, enabling the first expansion part 11 to expand radially under the action of the first nut 3, enabling a free end of a first expansion block 111 to expand outwards, enabling a second expansion part 12 to expand radially under the action of the second nut 4, and enabling a free end of a second expansion block 121 to expand outwards, so as to lock the side plate 01 and the laminate 02;
(3) the lifting screw rod continues to rotate, the expansion part 14 of the expansion connecting piece can contract and tighten the side plate 01 and the laminate 02 together, and shaking between the two wood boards is avoided.
When the lifting screw rod rotates reversely, the first nut 3 and the second nut 4 move towards the side opposite to the head 21 of the lifting screw rod, so that the first expansion part 11 and the second expansion part 12 contract and reset, 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 an integrated structure, a cross screwdriver is used to extend into the installation hole of the laminate during installation, and the expansion connecting piece and the laminate 02 can be locked by twisting the cross screwdriver, so that the installation is convenient and rapid, 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 (10)
1. An expansion connecting piece is characterized by comprising a lifting screw, a first nut, a second nut and an expansion sleeve, wherein the expansion sleeve is of a hollow barrel structure, a first expansion part, a second 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 one end of the screw, the first nut and the second nut are sleeved on the screw, the first nut, the second nut and the lifting screw are arranged in the expansion sleeve, the first nut is arranged in the first expansion part, the second nut is arranged in the second expansion part, the first nut and the first expansion part slide relatively along the axial direction so as to expand or contract and reset the first expansion part, the second nut and the second expansion part slide relatively along the axial direction so as to expand or contract and reset the second expansion part, the adjusting part is provided with an accommodating cavity for accommodating the head of the lifting screw, and a radial adjusting hole is formed in the side wall of the adjusting part, the accommodating cavity is communicated with the adjusting hole, gear teeth extending along the axial direction are arranged on the end face of the head of the lifting screw rod, the gear teeth are uniformly arranged along the circumferential direction of the head at intervals, and a tooth groove is formed between every 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. The expansion joint as claimed in claim 3, wherein the positioning plate is provided with a limiting hole at a middle portion thereof.
5. The expansion joint as claimed in claim 1, wherein a bellows-like expansion part is provided between the first expansion part and the second expansion part.
6. The expansion joint as claimed in claim 1, wherein the first expansion part is provided with at least one outwardly expandable expansion piece, which is connected at one end to a side wall of the first expansion part and at the opposite end to the side wall of the first expansion part, the expansion piece extending in the axial direction of the expansion sleeve, and the second expansion part is provided with at least one outwardly expandable expansion piece, which is connected at one end to a side wall of the second expansion part and at the opposite end to the side wall of the second expansion part, the expansion piece extending in the axial direction of the expansion sleeve.
7. The expansion joint as claimed in claim 6, wherein the outer wall of the expansion block is provided with a texture for increasing the surface friction.
8. The expansion connector according to any one of claims 1 to 7, wherein the outer surface of the first nut is provided with an ejector part for expanding the first expansion part, the ejector part is provided with an ejector surface, the shape of an inner hole of the first expansion part is matched with that of the ejector surface, the outer surface of the second nut is provided with an ejector part for expanding the second expansion part, the ejector part is provided with ejector surfaces with alternate concave and convex shapes, and the shape of an inner hole of the second expansion part is matched with that of the ejector surface.
9. The expansion joint as claimed in claim 8, wherein the pushing surface of the first nut 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 first 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, the outer surface of the first nut slides relative to the inner wall of the first expansion part to expand or contract the expansion part for restoration,
the pushing surface of the second nut comprises a cylindrical surface and a conical surface with gradually enlarged diameter, the cylindrical surface is connected with the end with the largest diameter of the conical surface, the inner hole of the second expansion part comprises a cylindrical hole and a conical hole with gradually enlarged diameter, the cylindrical hole is connected with the end with the largest diameter of the conical hole, and the outer surface of the second nut and the inner wall of the second expansion part slide relatively so that the expansion part expands or contracts to reset.
10. The expansion joint as claimed in any one of claims 1 to 7, wherein the outer surface of the first nut is further provided with a stopper bar extending in the axial direction, the inner hole wall of the first expansion part is provided with a stopper groove engaged with the stopper bar, the stopper bar is embedded in the stopper groove,
the outer surface of the second nut is also provided with a limiting strip extending along the axial direction, the inner hole wall of the second expansion part is provided with a limiting groove matched with the limiting strip, and the limiting strip is embedded into the limiting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920929297.8U CN210034090U (en) | 2019-06-19 | 2019-06-19 | Expansion connecting piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920929297.8U CN210034090U (en) | 2019-06-19 | 2019-06-19 | Expansion connecting piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210034090U true CN210034090U (en) | 2020-02-07 |
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ID=69348490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920929297.8U Active CN210034090U (en) | 2019-06-19 | 2019-06-19 | Expansion connecting piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210034090U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145520A (en) * | 2019-06-19 | 2019-08-20 | 广州花都区乐思富科技有限公司 | A kind of expansion connector |
| CN111764620A (en) * | 2020-06-29 | 2020-10-13 | 中科盛博建设集团有限公司 | Pre-buried detachable scaffold |
-
2019
- 2019-06-19 CN CN201920929297.8U patent/CN210034090U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145520A (en) * | 2019-06-19 | 2019-08-20 | 广州花都区乐思富科技有限公司 | A kind of expansion connector |
| CN110145520B (en) * | 2019-06-19 | 2024-04-02 | 广州花都区乐思富科技有限公司 | Expansion connecting piece |
| CN111764620A (en) * | 2020-06-29 | 2020-10-13 | 中科盛博建设集团有限公司 | Pre-buried detachable scaffold |
| CN111764620B (en) * | 2020-06-29 | 2021-12-07 | 中科盛博建设集团有限公司 | Pre-buried detachable scaffold |
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