CN219691933U - High stability expansion screw - Google Patents
High stability expansion screw Download PDFInfo
- Publication number
- CN219691933U CN219691933U CN202320489744.9U CN202320489744U CN219691933U CN 219691933 U CN219691933 U CN 219691933U CN 202320489744 U CN202320489744 U CN 202320489744U CN 219691933 U CN219691933 U CN 219691933U
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- screw
- expansion
- hole
- blind hole
- expansion screw
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Abstract
The utility model relates to a high stability expansion screw in the expansion screw technical field, comprising: the wall body is provided with a blind hole, and the expansion screw is arranged in the blind hole. The expansion screw comprises a screw body arranged in the blind hole, an expansion plate arranged at the tail part of the screw body and a nail core inserted in the screw body. When the expansion screw needs to be disassembled, the second nut positioned at the head part of the nail core is screwed out, so that the nail core moves leftwards in the through hole, the expansion piece is driven to rotate downwards and is accommodated in the groove, and the expansion screw is taken out from the blind hole after the first nut is screwed out.
Description
Technical Field
The utility model relates to the technical field of expansion screws, in particular to a high-stability expansion screw.
Background
The traditional expansion screw is fixed by utilizing wedge-shaped inclination to promote expansion to generate friction grip force and extruding the wall hole.
Such as chinese patent application number CN201820536055.8, the architectural expansion screw assembly comprises a screw, a nut and a sleeve. A plurality of annular uniformly distributed linear cuts are formed in one axial end of the sleeve, expansion sheets are arranged between two adjacent linear cuts, the inclined surfaces of the screws are in contact with the expansion sheets, and the screws penetrate through the sleeve and the nut and are in threaded connection with the nut; the outer circular surface of the sleeve is provided with a plurality of annular uniformly distributed V-shaped notches and triangular plates which are arranged in the V-shaped notches and bent through the V-shaped notches, the outer circular surface of the screw is provided with a plurality of annular uniformly distributed baffle plates, and the baffle plates are contacted with the triangular plates after penetrating through the V-shaped notches. It has the following drawbacks:
when the expansion screw needs to be disassembled, the expansion sheet is deformed to be in contact with the wall hole, so that the expansion screw is difficult to take out of the wall hole.
Disclosure of Invention
In order to solve the problem that the expansion screw is difficult to take out from the wall hole due to the deformation of the expansion sheet and the contact of the expansion sheet when the expansion screw is required to be disassembled, the utility model provides the following technical scheme:
a high-stability expansion screw comprises a wall body provided with a blind hole, an expansion screw arranged in the blind hole, a gasket sleeved on the expansion screw and a first nut screwed with the expansion screw. The expansion screw comprises a screw body arranged in the blind hole, an expansion plate arranged at the tail part of the screw body and a nail core inserted in the screw body.
The blind holes are stepped holes.
The head of the screw body is provided with threads for connecting the first nut, the tail of the screw body is provided with a groove, and the middle of the screw body is provided with a through hole for sliding the nail core.
The expansion plate comprises connecting rods arranged on two side walls in the groove, a special gear used for rotating is arranged on a rod body of the connecting rods, and expansion sheets are arranged on the special gear.
The tail of the nail core is provided with teeth which are in a circumferential array and meshed with the special-shaped gear, the head of the nail core is provided with threads, and the head of the nail core is connected with a second nut which is used for fastening the nail core and controlling the expansion plate to clamp the blind hole.
Further, the cavity of the blind hole is composed of two round holes with different diameters, the axial leads of the two round holes are positioned on the same straight line, and the round hole with the larger diameter is positioned behind the round hole with the smaller diameter.
Further, two elongated slots which are arranged vertically symmetrically are formed in the inner wall of the through hole of the screw body at the front side of the groove.
Further, the number of the grooves is four, and the grooves are distributed at the tail part of the screw body in a circumferential array.
Further, a sliding block used for sliding in the long groove is fixedly arranged on the core body of the nail core.
Compared with the prior art, the utility model has the beneficial effects that:
when the expansion screw needs to be disassembled, the second nut positioned at the head part of the nail core is screwed out, so that the nail core moves leftwards in the through hole, the expansion piece is driven to rotate downwards and is accommodated in the groove, and the expansion screw is taken out from the blind hole after the first nut is screwed out.
Drawings
FIG. 1 is a schematic view of an expansion screw of the present utility model mounted to a wall;
FIG. 2 is a cross-sectional view of an expansion screw of the present utility model;
FIG. 3 is a partial cross-sectional view of an expansion screw according to the present utility model;
FIG. 4 is a cross-sectional view taken along line a-a of FIG. 3 in accordance with the present utility model;
FIG. 5 is a cross-sectional view of a screw body of the present utility model;
FIG. 6 is an enlarged view of the utility model at A of FIG. 5;
FIG. 7 is a schematic view of the structure of the nail core of the present utility model;
fig. 8 is an enlarged view of fig. 7 at B in accordance with the present utility model.
In the drawings, the list of part names represented by the reference numerals is as follows:
1-blind holes, 2-walls, 3-expansion screws, 4-first nuts, 5-gaskets, 6-second nuts, 31-screw bodies, 32-expansion plates, 33-screw cores, 01-grooves, 321-connecting rods, 322-special-shaped gears, 323-expansion sheets, 311-long grooves and 331-sliding blocks.
Detailed Description
Preferred embodiments for carrying out the present utility model are described in detail below, and a clear and complete description thereof is provided with reference to the accompanying drawings.
Referring to fig. 1-8, the present utility model provides a high stability expansion screw.
The wall body 2 is provided with a blind hole 1, the cavity of the blind hole 1 is composed of two round holes with different diameters, the axes of the two round holes are positioned on the same straight line, and the round hole with larger diameter is positioned behind the round hole with smaller diameter. The aperture axis of the blind hole 1 coincides with the axis of the expansion screw 3. The expansion screw 3 is arranged in the blind hole 1, a gasket 5 sleeved on the expansion screw 3 and a nut 4 screwed with the expansion screw 3. The expansion screw 3 comprises a screw body 31 arranged in the blind hole 1, an expansion plate 32 arranged at the tail part of the screw body 31 and a nail core 33 inserted in the screw body 31.
The head of the screw body 31 is provided with threads for screwing the first nut 4, and the gasket 5 is sleeved on the screw body in front of the first nut 4. The tail of the bolt body 31 is provided with four grooves 01, and the four grooves 01 are distributed at the tail of the bolt body 31 in a circumferential array. The middle part of the screw body 31 is provided with a through hole for sliding the nail core 33, and the aperture axis of the through hole is consistent with the axis of the nail core 33. Two elongated slots 311 which are arranged vertically symmetrically are arranged on the inner wall of the through hole of the screw body 31 at the front side of the groove 01.
The expansion plate 32 comprises connecting rods 321 arranged on two side walls in the groove 01, a special-shaped gear 322 is welded on one side of the expansion plate 232, the other side of the expansion plate 323 is semicircular, the expansion plate 323 can conveniently enter and exit the groove 01, and the special-shaped gear 322 is hinged on a rod body of the connecting rods 321.
The tail of the nail core 33 is provided with teeth which are in a circumferential array and meshed with the special-shaped gear 322, so that when the nail core 33 moves left and right in the through hole, the special-shaped gear 322 rotates under the meshing action with the special-shaped gear 322. The head of the nail core 33 is provided with threads for the threaded nut two 6. The core body of the nail core 33 is fixedly provided with a slide block 331, the slide block 331 slides on the long groove 311 on the inner wall of the through hole, and the slide block 331 is in sliding fit with the long groove 311, so that the nail core 33 only moves left and right and does not rotate when rotating. When the second nut 6 is screwed, the core 33 can only move rightward under the limiting action of the slide 331 and the long groove 311. Thereby rotating the profile gear 322 upward while driving the expansion sheet 323 mounted on the profile gear 322 to expand. Because the expansion plates 323 are distributed in the four grooves 01 in a circumferential array, when the four expansion plates 323 are unfolded to be in propped contact with the inner wall of the blind hole 1, the stability of the expansion screw 3 can be improved when the expansion screw 3 is in expansion fixation.
When the expansion screw 3 needs to be fixed, a user firstly opens a blind hole 1 with the aperture slightly larger than that of the expansion screw 3 on the wall body 2 through an electric drill, and the blind hole 1 is a stepped circular hole. In the process of installing the expansion screw 3 in the blind hole 1, a gasket 5 and a screw-in nut 4 are sleeved on the head of the screw body 31 in sequence. The expansion screw 3 is pre-fixed by screwing the first nut 4. The second nut 6 on the core 33 is screwed to move the core 33 rightward. Thereby driving the special gear 322 hinged with the connecting rod 321 in the groove 01 to rotate upwards, further expanding the expansion plate 324 on the special gear 323, and clamping the expansion plate 324 when the inner wall of the blind hole 1 is propped against and contacted. Since the expansion plates 323 are distributed in the four grooves 01 in a circumferential array, when the four expansion plates 323 are unfolded to be in contact with the inner wall of the blind hole 1, the stability of the expansion screw 3 can be improved when the expansion screw 3 is expanded and fixed.
When the expansion screw 3 needs to be disassembled, the second nut 6 on the screw core 33 is screwed out, so that the screw core 33 enters the through hole of the expansion screw 3 leftwards. Thereby driving the special-shaped gear 322 hinged with the connecting rod 321 in the groove 01 to rotate downwards, and enabling the expansion piece 323 welded on the special-shaped gear 322 to rotate into the groove 01. After the first nut 4 is screwed out, the expansion screw 3 is taken out from the blind hole 1.
Based on the above description and the drawings, one skilled in the art will be able to understand and practice the present utility model. Furthermore, any non-inventive modifications to the present utility model that would not be made by a person skilled in the art without the inventive effort would still fall within the scope of the present utility model.
Claims (5)
1. The utility model provides a high stability expansion screw, is including offering wall body (2) of blind hole (1), install expansion screw (3) in blind hole (1), cover gasket (5) on expansion screw (3) and with first (4) of nut of expansion screw (3) silk grafting, its characterized in that: the expansion screw (3) comprises a screw body (31) arranged in the blind hole (1), an expansion plate (32) arranged at the tail part of the screw body (31) and a nail core (33) inserted in the screw body (31);
the blind hole (1) is a stepped hole;
the head of the screw body (31) is provided with a thread for connecting the first nut (4), the tail of the screw body (31) is provided with a groove (01), and the middle of the screw body (31) is provided with a through hole for sliding the nail core (33);
the expansion plate (32) comprises connecting rods (321) arranged on two side walls in the groove (01), a special gear (322) for rotating is arranged on a rod body of the connecting rods (321), and an expansion sheet (323) is arranged on the special gear (322);
the tail of the nail core (33) is provided with teeth which are in a circumferential array and meshed with the special-shaped gear (322), the head of the nail core (33) is provided with threads, and the head of the nail core (33) is connected with a second nut (6) which is used for fastening the nail core (33) and controlling the expansion plate (32) to clamp the blind hole (1).
2. A high stability expansion screw according to claim 1, wherein: the hole cavity of the blind hole (1) consists of two round holes with different diameters, the axial leads of the two round holes are positioned on the same straight line, and the round hole with larger diameter is positioned behind the round hole with smaller diameter.
3. A high stability expansion screw according to claim 1, wherein: two elongated slots (311) which are vertically symmetrically arranged are formed in the inner wall of the through hole of the screw body (31) at the front side of the groove (01).
4. A high stability expansion screw according to claim 1, wherein: the number of the grooves (01) is four, and the grooves are distributed at the tail part of the screw body (31) in a circumferential array.
5. A high stability expansion screw according to claim 3, characterized in that: a slide block (331) used for sliding in the long groove (311) is fixedly arranged on the core body of the nail core (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320489744.9U CN219691933U (en) | 2023-03-15 | 2023-03-15 | High stability expansion screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320489744.9U CN219691933U (en) | 2023-03-15 | 2023-03-15 | High stability expansion screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219691933U true CN219691933U (en) | 2023-09-15 |
Family
ID=87940193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320489744.9U Active CN219691933U (en) | 2023-03-15 | 2023-03-15 | High stability expansion screw |
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| Country | Link |
|---|---|
| CN (1) | CN219691933U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117662589A (en) * | 2024-02-01 | 2024-03-08 | 江苏甬怡紧固件有限公司 | Unilateral fastening bolt assembly |
| CN117662589B (en) * | 2024-02-01 | 2024-04-23 | 江苏甬怡紧固件有限公司 | Unilateral fastening bolt assembly |
-
2023
- 2023-03-15 CN CN202320489744.9U patent/CN219691933U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117662589A (en) * | 2024-02-01 | 2024-03-08 | 江苏甬怡紧固件有限公司 | Unilateral fastening bolt assembly |
| CN117662589B (en) * | 2024-02-01 | 2024-04-23 | 江苏甬怡紧固件有限公司 | Unilateral fastening bolt assembly |
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