CN109372862B - Expansion bolt suitable for large aperture - Google Patents
Expansion bolt suitable for large aperture Download PDFInfo
- Publication number
- CN109372862B CN109372862B CN201811539757.2A CN201811539757A CN109372862B CN 109372862 B CN109372862 B CN 109372862B CN 201811539757 A CN201811539757 A CN 201811539757A CN 109372862 B CN109372862 B CN 109372862B
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- China
- Prior art keywords
- section
- sleeve
- expansion
- arc
- hole
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
- F16B13/066—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
The invention discloses an expansion bolt suitable for a large aperture, which comprises a bolt, a sleeve, a gasket, a spring washer and an expansion nut, wherein the sleeve is cylindrical, a through hole is arranged in the center of the sleeve, an outwards protruding arc-shaped section is arranged at the position, close to the top end, of the sleeve, an annular bulge is arranged at the bottom end of the arc-shaped section on the inner wall of the through hole, a plurality of grooves extending to the bottom end and penetrating through the pipe wall are arranged on the outer wall of the sleeve, the expansion nut comprises a cylindrical pressing section and a circular truncated cone-shaped expansion section, threaded holes are penetrated in the pressing section and the expansion section, the arc-shaped section of the sleeve is forced to bend and deform through the pressing section of the expansion nut, so that the sleeve is clamped with a preset hole at the upper end, the looseness of the sleeve is reduced in the preset hole with a larger aperture, the expansion section of the expansion nut is forced to expand the sleeve along the first groove, the bolt, the expansion nut and the sleeve are clamped with the preset hole mutually, and the tightness of the expansion bolt is ensured.
Description
[ field of technology ]
The invention relates to the technical field of expansion bolts, in particular to the technical field of expansion bolts suitable for large apertures.
[ background Art ]
Currently, during installation of certain equipment, it is necessary to secure the equipment body or other structural attachment to the floor or wall using expansion bolts. The common connection method is to make holes in the ground or the wall in advance, then put the sleeve and the bolt in, and then fix the sleeve and the bolt by using the gasket.
For preset holes with different sizes, expansion pipes with different sizes are required to be equipped, when the aperture of the preset hole is larger, if the expansion pipe is smaller in size, the expansion head only expands and fixes the sleeve at the bottom end of the sleeve, so that a piece to be fixed, which is fixed at the other end of the sleeve, is easy to loosen after being subjected to multiple vibration, and equipment or device installation is unstable.
[ invention ]
The invention aims to solve the problems in the prior art, and provides an expansion bolt suitable for a large aperture, wherein an arc section of a sleeve can be forced to bend and deform through a compression section of an expansion nut so as to clamp a preset hole at the upper end of the sleeve, so that looseness of the sleeve is reduced in the preset hole with a larger aperture, the sleeve is forced to expand along a first groove through the expansion section of the expansion nut, so that the bolt, the expansion nut, the sleeve and the preset hole are mutually clamped at the lower end of the sleeve, and tightness of the expansion bolt is ensured.
In order to achieve the above purpose, the invention provides an expansion bolt suitable for a large aperture, which comprises a bolt, a sleeve, a gasket, a spring washer and an expansion nut, wherein the sleeve is cylindrical, a through hole is arranged in the center of the sleeve, an outwards protruding arc-shaped section is arranged at the position, close to the top end, of the sleeve, an annular bulge is arranged at the bottom end of the arc-shaped section on the inner wall of the through hole, a plurality of grooves extending to the bottom end and penetrating through the pipe wall are arranged on the outer wall of the sleeve, the expansion nut comprises a cylindrical pressing section and a truncated cone-shaped expansion section, threaded holes are formed in the pressing section and the expansion section in a penetrating mode, the bolt comprises a hexagonal screw head and a screw rod with external threads, and the screw rod sequentially penetrates through the spring washer, the gasket, the sleeve and the expansion nut from top to bottom.
Preferably, the compression section and the expansion section are of an integrated structure, the outer diameter of the top end of the expansion section is the same as that of the compression section, and the expansion section can expand the sleeve along the groove when entering the sleeve.
Preferably, the recess is located below the arcuate segment.
Preferably, the aperture of the through hole below the arc-shaped section is matched with the outer diameter of the compression section, the aperture of the through hole above the arc-shaped section is matched with the outer diameter of the screw rod, the inner diameter of the annular bulge is slightly larger than the outer diameter of the compression section, the aperture of the threaded hole is matched with the outer diameter of the screw rod, and the length of the through hole below the arc-shaped section is consistent with the length of the compression section.
Preferably, the thickness of the tube wall of the sleeve at the arcuate segment is less than the thickness of the tube wall below the arcuate segment.
Preferably, the arc-shaped section is provided with a plurality of arc-shaped grooves.
The invention has the beneficial effects that: according to the invention, the arc-shaped section of the sleeve is forced to bend and deform through the compression section of the expansion nut, so that the sleeve is clamped with the preset hole at the upper end, the looseness of the sleeve in the preset hole with a larger aperture is reduced, the sleeve is forced to expand along the first groove through the expansion section of the expansion nut, so that the bolt, the expansion nut, the sleeve and the preset hole are mutually clamped at the lower end of the sleeve, and the tightness of the expansion bolt is ensured.
The features and advantages of the present invention will be described in detail by way of example with reference to the accompanying drawings.
[ description of the drawings ]
FIG. 1 is a front view of an expansion bolt suitable for use in a large bore of the present invention;
FIG. 2 is a front view of a bushing of an expansion bolt suitable for use in a large bore of the present invention;
FIG. 3 is a front view of an expansion nut of the present invention adapted for use with a large bore expansion bolt;
fig. 4 is a front view of a bolt suitable for use in a large bore expansion bolt of the present invention.
In the figure: 1-bolt, 11-hexagonal screw head, 12-screw, 2-sleeve, 21-through hole, 211-annular protrusion, 212-recess, 22-arc section, 221-arc groove, 3-gasket, 4-spring washer, 5-expansion nut, 51-compression section, 52-expansion section and 53-screw hole.
[ detailed description ] of the invention
Referring to fig. 1 to 4, the expansion bolt suitable for large aperture comprises a bolt 1, a sleeve 2, a gasket 3, a spring washer 4 and an expansion nut 5, wherein the sleeve 2 is cylindrical and is provided with a through hole 21 in the center, an arc section 22 protruding outwards is arranged at the position, close to the top end, of the sleeve 2, an annular protrusion 211 is arranged at the bottom end of the arc section 22 on the inner wall of the through hole 21, a plurality of grooves 212 extending to the bottom end and penetrating through the pipe wall are arranged on the outer wall of the sleeve 2, the expansion nut 5 comprises a cylindrical pressing section 51 and a truncated cone-shaped expansion section 52, threaded holes 53 are arranged in the pressing section 51 and the expansion section 52 in a penetrating manner, the bolt 1 comprises a hexagonal screw head 11 and a screw 12 with external threads, the screw 12 sequentially penetrates through the spring washer 4, the gasket 3, the sleeve 2 and the expansion nut 5 from top to bottom, the outer diameter of the top end of the expansion section 52 is identical to the outer diameter of the pressing section 51, the expansion section 52 enters the sleeve 2, the groove 212 is expanded along the groove 212, the diameter of the circular protrusion 21 is smaller than the inner diameter of the arc section 22, the diameter of the circular protrusion section 22 is equal to the outer diameter of the arc section 22, the circular protrusion section 22 is positioned below the arc section 22, and the outer diameter of the circular protrusion section 21 is equal to the outer diameter of the arc section 22, the circular protrusion section 22 is positioned below the circular groove 22, and the circular groove diameter of the circular protrusion section 21 is equal to the outer diameter of the circular groove 21 is equal to the diameter of the circular groove 22, and the circular groove 21 is equal to the diameter.
The working process of the invention comprises the following steps:
in the working process of the expansion bolt suitable for the large aperture, firstly, the compression section 51 of the expansion nut 5 is inserted into the through hole 21 from the bottom of the sleeve 2, and the sleeve 2 with the expansion nut 5 is inserted into the preset hole. Then, the through hole of the to-be-fixed piece is aligned with the preset hole on the ground or the wall body, and the bolt 1 is inserted into the preset hole after passing through the gasket 3 and the spring washer 4. The bolt 1 is tightened such that the expansion nut 5 is retracted along the shank 12 of the bolt 1. Along with the retraction of the expansion nut 5, the pressing section 51 gradually presses the arc section 22 with thinner tube wall upwards to enable the arc section 22 to continue bending along the original bending direction, the arc groove 221 can promote the bending of the arc section 22, the bent arc section 22 protrudes outwards and clamps the wall of the preset hole, when the ground or the wall is loose, the preset hole can be penetrated even, then the pressing section 51 gradually passes through the annular protrusion 211, and the expansion section 52 enters the sleeve 2 to enable the sleeve 2 to expand along the first groove 212.
According to the invention, the arc-shaped section of the sleeve is forced to bend and deform through the compression section of the expansion nut, so that the sleeve is clamped with the preset hole at the upper end, the looseness of the sleeve in the preset hole with a larger aperture is reduced, the sleeve is forced to expand along the first groove through the expansion section of the expansion nut, so that the bolt, the expansion nut, the sleeve and the preset hole are mutually clamped at the lower end of the sleeve, and the tightness of the expansion bolt is ensured.
The above embodiments are illustrative of the present invention, and not limiting, and any simple modifications of the present invention fall within the scope of the present invention.
Claims (5)
1. An expansion bolt suitable for large aperture, its characterized in that: the novel steel pipe comprises a bolt (1), a sleeve (2), a gasket (3), a spring washer (4) and an expansion nut (5), wherein the sleeve (2) is cylindrical, a through hole (21) is formed in the center of the sleeve, an outwards protruding arc-shaped section (22) is arranged at the position, close to the top end, of the sleeve (2), an annular protrusion (211) is arranged at the bottom end of the arc-shaped section (22) on the inner wall of the through hole (21), a plurality of grooves (212) extending to the bottom end and penetrating through the pipe wall are formed in the outer wall of the sleeve (2), the expansion nut (5) comprises a cylindrical pressing section (51) and a truncated cone-shaped expansion section (52), threaded holes (53) are formed in the pressing section (51) and the expansion section (52) in a penetrating mode, the bolt (1) comprises a hexagonal screw head (11) and a screw rod (12) with external threads, the screw rod (12) sequentially penetrates through the spring washer (4), the gasket (3), the sleeve (2) and the expansion nut (5) from top to bottom, the pressing section (51) and the expansion section (52) are of an integral structure, and the outer diameter of the pressing section (52) is identical to the grooves of the outer diameter of the expansion section (52) and the grooves (22) of the pressing section (52). The expansion nut (5) is retracted along the screw rod (12) of the bolt (1), the compression section (51) gradually compresses the arc section (22) with thinner pipe wall upwards to enable the arc section (22) to continuously bend along the original bending direction, the bent arc section (22) protrudes outwards and clamps the wall of the preset hole, and then the compression section (51) gradually passes through the annular protrusion (211) to enable the expansion section (52) to enter the sleeve (2) so as to enable the sleeve (2) to expand along the first groove (212).
2. An expansion bolt suitable for use in a large bore as claimed in claim 1, wherein: the expansion section (52) can expand the sleeve (2) along the groove (212) when entering the sleeve (2).
3. An expansion bolt suitable for use in a large bore as claimed in claim 1, wherein: the aperture of the through hole (21) below the arc-shaped section (22) is matched with the outer diameter of the pressing section (51), the aperture of the through hole (21) above the arc-shaped section (22) is matched with the outer diameter of the screw rod (12), the inner diameter of the annular bulge (211) is slightly larger than the outer diameter of the pressing section (51), the aperture of the threaded hole (53) is matched with the outer diameter of the screw rod (12), and the length of the through hole (21) below the arc-shaped section (22) is consistent with the length of the pressing section (51).
4. An expansion bolt suitable for use in a large bore as claimed in claim 1, wherein: the thickness of the pipe wall of the sleeve (2) positioned at the arc-shaped section (22) is smaller than the thickness of the pipe wall positioned below the arc-shaped section (22).
5. An expansion bolt suitable for use in a large bore as claimed in claim 1, wherein: a plurality of arc-shaped grooves (221) are formed in the arc-shaped section (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811539757.2A CN109372862B (en) | 2018-12-17 | 2018-12-17 | Expansion bolt suitable for large aperture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811539757.2A CN109372862B (en) | 2018-12-17 | 2018-12-17 | Expansion bolt suitable for large aperture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109372862A CN109372862A (en) | 2019-02-22 |
| CN109372862B true CN109372862B (en) | 2023-08-25 |
Family
ID=65374163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811539757.2A Active CN109372862B (en) | 2018-12-17 | 2018-12-17 | Expansion bolt suitable for large aperture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109372862B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116492647A (en) * | 2022-11-15 | 2023-07-28 | 东莞市乐怡特电子科技有限公司 | Screw rod shrink expansion device and grip strength body-building ball |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2443186Y (en) * | 2000-09-05 | 2001-08-15 | 栾福裕 | Expansion fastening hanger rod |
| CN101463854A (en) * | 2009-01-10 | 2009-06-24 | 金拯 | Expansion bolt |
| CN102359464A (en) * | 2011-10-26 | 2012-02-22 | 裴春光 | Shearing type expansion bolt |
| CN206487734U (en) * | 2016-12-21 | 2017-09-12 | 久可工业股份有限公司 | Expansion bolts that prevent incomplete expansion |
| JP3212694U (en) * | 2017-07-10 | 2017-09-28 | 石橋 勝 | Loosening prevention bolt |
| CN209398693U (en) * | 2018-12-17 | 2019-09-17 | 嘉兴钰丰汽车零部件有限公司 | An Expansion Bolt Applicable to Large Hole Diameter |
-
2018
- 2018-12-17 CN CN201811539757.2A patent/CN109372862B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2443186Y (en) * | 2000-09-05 | 2001-08-15 | 栾福裕 | Expansion fastening hanger rod |
| CN101463854A (en) * | 2009-01-10 | 2009-06-24 | 金拯 | Expansion bolt |
| CN102359464A (en) * | 2011-10-26 | 2012-02-22 | 裴春光 | Shearing type expansion bolt |
| CN206487734U (en) * | 2016-12-21 | 2017-09-12 | 久可工业股份有限公司 | Expansion bolts that prevent incomplete expansion |
| JP3212694U (en) * | 2017-07-10 | 2017-09-28 | 石橋 勝 | Loosening prevention bolt |
| CN209398693U (en) * | 2018-12-17 | 2019-09-17 | 嘉兴钰丰汽车零部件有限公司 | An Expansion Bolt Applicable to Large Hole Diameter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109372862A (en) | 2019-02-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 314300 Qinshan Street Industrial Park, Haiyan County, Jiaxing City, Zhejiang Province Applicant after: Jiaxing Yufeng Auto Parts Co.,Ltd. Address before: 314300 Qinshan Street Industrial Park, Haiyan County, Jiaxing City, Zhejiang Province Applicant before: JIAXING YUFENG CAR PARTS Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |