CN213839185U - Hole shrinking device - Google Patents
Hole shrinking device Download PDFInfo
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- CN213839185U CN213839185U CN202021557559.1U CN202021557559U CN213839185U CN 213839185 U CN213839185 U CN 213839185U CN 202021557559 U CN202021557559 U CN 202021557559U CN 213839185 U CN213839185 U CN 213839185U
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- annular shell
- supporting part
- inner annular
- shell
- outer annular
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Abstract
The utility model relates to a shrinkage cavity device relates to the machine part field, has solved among the prior art unable in the less expansion bolts' of great hole internal fixation problem. The main technical scheme adopted is as follows: comprises an inner annular shell and an outer annular shell; the inner annular shell and the outer annular shell are concentric circles; the inner surface of the inner annular shell is provided with inner protruded teeth, the outer surface of the inner annular shell is integrally provided with an inner supporting part, and the top end of the inner annular shell is connected with the outer annular shell through a first connecting sheet; the outer surface of the outer annular shell is provided with outer convex teeth, the inner surface of the outer annular shell is integrally provided with an outer supporting part, and the top end of the outer annular shell is connected with the inner annular shell through a second connecting sheet; the inner supporting part and the outer supporting part are ridge-shaped, the inner annular shell rotates clockwise, and inverted teeth matched with each other are integrally formed on the contact surface of the inner supporting part and the outer supporting part.
Description
Technical Field
The utility model relates to a machine part field especially relates to a shrinkage cavity device.
Background
When certain article are hung to needs at the wall, need punch the back and squeeze into expansion bolts on the wall, realizing the utility model discloses the in-process, the inventor finds to have following problem among the prior art at least: when the diameter of the existing drill bit in hand is larger than that of the expansion bolt, or the existing hole is utilized for transformation, the expansion bolt cannot be fixed in the hole, and the use is influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a hole shrinking device, which is mainly aimed at fixing a smaller expansion bolt in a larger hole, thereby being more practical.
In order to achieve the above object, the utility model mainly provides the following technical scheme:
an embodiment of the utility model provides a shrinkage cavity device, include: an inner annular shell and an outer annular shell; the inner annular shell and the outer annular shell are concentric circles; the inner surface of the inner annular shell is provided with inner protruded teeth, the outer surface of the inner annular shell is integrally provided with an inner supporting part, and the top end of the inner annular shell is connected with the outer annular shell through a first connecting sheet; the outer surface of the outer annular shell is provided with outer convex teeth, the inner surface of the outer annular shell is integrally provided with an outer supporting part, and the top end of the outer annular shell is connected with the inner annular shell through a second connecting sheet; the inner supporting part and the outer supporting part are ridge-shaped, the inner annular shell rotates clockwise, and inverted teeth matched with each other are integrally formed on the contact surface of the inner supporting part and the outer supporting part.
The purpose of the utility model and the technical problem thereof can be further realized by adopting the following technical measures.
Alternatively, the shrinkage cavity device is provided, wherein the inner annular shell and the outer annular shell have the same length.
Optionally, in the hole shrinkage device, when the contact surfaces of the inner support portion and the outer support portion are not parallel, the inner annular shell is rotated clockwise, and when the two contact surfaces are in contact, the two contact surfaces are parallel.
Optionally, in the hole shrinkage device, the height and the width of the outer protruding tooth are greater than those of the inner protruding tooth.
Borrow by above-mentioned technical scheme, the utility model discloses at least, have following advantage: the expansion bolt can be normally used only by sleeving the hole shrinkage device outside an expansion sleeve of the expansion bolt, and a smaller expansion bolt is fixed in a larger hole; when the disassembly is needed, the inner annular shell and the outer annular shell are not mutually occluded, and the disassembly is convenient.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
Fig. 1 is a hole shrinkage device according to an embodiment of the present invention.
Detailed Description
The utility model discloses a solve among the prior art unable in the less expansion bolts' of great hole internal fixation problem, provide a shrinkage cavity device to fixing and dismantling at convenient less expansion bolts.
The utility model discloses technical scheme for solving above-mentioned technical problem, the general thinking is as follows:
the utility model provides a pair of hole shrinking device.
To further illustrate the technical means and effects of the present invention for achieving the intended purpose of the present invention, the following detailed description will be given to the embodiments, structures, features and effects of the hole-shrinking device according to the present invention with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, with the specific understanding that: both a and B may be included, a may exist alone, or B may exist alone, and any of the three cases can be provided.
As shown in fig. 1, an embodiment of the present invention provides a hole shrinking device, which includes: an inner annular shell 2 and an outer annular shell 1; the inner annular shell 2 and the outer annular shell 1 are concentric circles, and preferably the inner annular shell 2 and the outer annular shell 1 have the same length; the inner surface of the inner annular shell 2 is integrally provided with inner convex teeth 3.1, the outer surface of the inner annular shell is integrally provided with an inner supporting part 7, and the top end of the inner annular shell is connected with the outer annular shell 1 through a first connecting sheet 8. The outer surface of the outer annular shell 1 is integrally provided with outer protruding teeth 3.2, the height and the width of the outer protruding teeth 3.2 are larger than those of the inner protruding teeth 3.1, the inner surface of the outer annular shell is integrally provided with an outer supporting part 4, the top end of the outer protruding teeth is connected with the inner annular shell 2 through a second connecting piece 6, and the first connecting piece 8 and the second connecting piece 6 play a role in fixing the inner annular shell 2 and the outer annular shell 1 together before use. The inner supporting part 7 and the outer supporting part 4 are in the shape of a ridge, the inner annular shell 2 is rotated clockwise, and inverted teeth 5 matched with each other are integrally formed on the contact surface of the inner supporting part 7 and the outer supporting part 4; the contact surfaces of the inner support part 7 and the outer support part 4 are not parallel, the inner annular shell 2 is rotated clockwise, and when the two contact surfaces are contacted, the two contact surfaces are parallel.
When the hole-reducing device is used, the hole-reducing device is only required to be sleeved outside an expansion sleeve of an expansion bolt and placed into a hole, a screw is screwed in to drive the hole-reducing device to rotate clockwise, the first connecting piece 8 and the second connecting piece 6 are disconnected, the inner supporting part 7 is mutually meshed with the inverted teeth 5 on the outer supporting part 4 and continues to rotate, and the inner annular shell 2 is gradually squeezed by the inner supporting part 7 and the outer supporting part 4 to be reduced until the inner annular shell reaches a fastening state. When the outer annular shell 1 needs to be disassembled, the inner annular shell 2 can be taken out by pulling out the expansion sleeve because the inner annular shell 2 is separated from the outer annular shell 1, and then the outer annular shell 1 is taken out.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.
Claims (4)
1. A hole reducing device, comprising: an inner annular shell and an outer annular shell; the inner annular shell and the outer annular shell are concentric circles; the inner surface of the inner annular shell is provided with inner protruded teeth, the outer surface of the inner annular shell is integrally provided with an inner supporting part, and the top end of the inner annular shell is connected with the outer annular shell through a first connecting sheet; the outer surface of the outer annular shell is provided with outer convex teeth, the inner surface of the outer annular shell is integrally provided with an outer supporting part, and the top end of the outer annular shell is connected with the inner annular shell through a second connecting sheet; the inner supporting part and the outer supporting part are ridge-shaped, the inner annular shell rotates clockwise, and inverted teeth matched with each other are integrally formed on the contact surface of the inner supporting part and the outer supporting part.
2. The hole reducing device of claim 1, wherein the inner annular shell and the outer annular shell are the same length.
3. A hole reducing device according to claim 1, wherein the contact surfaces of the inner support and the outer support are not parallel, and the inner annular housing is rotated clockwise so that the contact surfaces are parallel when they are in contact.
4. The hole reducing device of claim 1, wherein the outer lobes have a greater height and width than the inner lobes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021557559.1U CN213839185U (en) | 2020-07-31 | 2020-07-31 | Hole shrinking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021557559.1U CN213839185U (en) | 2020-07-31 | 2020-07-31 | Hole shrinking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213839185U true CN213839185U (en) | 2021-07-30 |
Family
ID=76987773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021557559.1U Active CN213839185U (en) | 2020-07-31 | 2020-07-31 | Hole shrinking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213839185U (en) |
-
2020
- 2020-07-31 CN CN202021557559.1U patent/CN213839185U/en active Active
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