CN109026936B - Expansion bolt - Google Patents
Expansion bolt Download PDFInfo
- Publication number
- CN109026936B CN109026936B CN201811156631.7A CN201811156631A CN109026936B CN 109026936 B CN109026936 B CN 109026936B CN 201811156631 A CN201811156631 A CN 201811156631A CN 109026936 B CN109026936 B CN 109026936B
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- CN
- China
- Prior art keywords
- nut
- bolt
- expansion bolt
- bolt body
- wedge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000010276 construction Methods 0.000 abstract description 8
- 238000009434 installation Methods 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- 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
Abstract
The present invention provides an expansion bolt, comprising: the bolt comprises a bolt body, wherein a cone is formed at one end of the bolt body; the sleeve is sleeved on the bolt body and wrapped on the vertebral body, and comprises a plurality of symmetrically arranged clamping pieces which clamp the vertebral body; the nut mounting, this nut mounting wears to locate on the bolt body, wherein, after expansion bolts inserted the mounting hole, the nut mounting of screwing for the bolt body stretches into to downthehole direction, the centrum will the folder back-out for the folder outwards expands and lies in between bolt body and the deep hole in centrum department, the folder expands expansion bolts, it is fixed to accomplish the installation, it has the structure of simplifying, easily realize, can effectively avoid appearing breaking or taking off when frequent vibrations appear in the mounting through expansion bolts, guarantee safe in utilization, and realize that expansion bolts dismantles recycle repeatedly, with reduction construction and maintenance cost.
Description
Technical Field
The invention relates to the technical field of construction tools and connecting equipment, in particular to an expansion bolt.
Background
The expansion bolt is a special threaded connector for fixing a pipeline support, a hanger, a bracket and equipment on a wall, a floor slab and a column, and mainly comprises a countersunk bolt, an expansion pipe, a flat washer, a spring pad and a hexagon nut. According to the expansion bolt in the prior art, firstly, a deep hole is drilled at a reserved fixed position of an object through an electric drill, then, after the bolt and an expansion pipe are inserted into the deep hole, the bolt, the expansion pipe and the object to be fixed can be expanded tightly by screwing a fixing nut, and then, the fixed object is locked and fixed.
The expansion bolt under the prior art, the end of its lead screw is the round platform form, when this kind of expansion bolt used, screwed the screw outside the hole, then the part that the lead screw stretches out was screwed, and the nut is tensile to the hole outside direction the screw rod, and the round platform received the power towards downthehole direction and was taut this moment, and then the iron sheet drum is expanded, and finally will treat that fixed object fixes on wall or beam slab, as above, the round platform form end-to-end connection with expansion pipe and lead screw makes its interact also can reach the purpose that the inflation was fastened.
However, in long-term construction and practice, constructors find that the expansion bolt in the prior art is difficult to ensure the fixing effect of the object, and particularly when the load of the object has vibration with large amplitude or frequency, the fixing effect is poor, phenomena such as loosening and breaking are easy to occur, and great potential safety hazards exist. For example, when the expansion bolts of the prior art are used to mount objects which are accompanied by vibration during operation, such as ceiling fans and windmills, the fixed-position connection members are liable to fall off during long-term operation. On the other hand, in the prior art, when the object fixed by the expansion bolt needs to be dismantled, the screw of the expansion bolt after being dismantled is still left in the deep hole at the fixed position, so that the object cannot be completely dismantled, and the left screw also has great potential safety hazard. In addition, the demolished expansion bolts and screws can only be discarded, thereby greatly increasing the construction cost and causing the waste of construction resources.
In view of the above, the prior art should be improved to solve the above technical problems in the prior art.
Disclosure of Invention
The invention aims to solve the technical problems and provide an expansion bolt which can prevent a fixing piece fixed by the expansion bolt from being broken or loosened when the fixing piece is used for a long time or frequently shakes, ensure the use safety and realize repeated disassembly and recycling of the expansion bolt so as to reduce the construction and maintenance cost.
In order to achieve the above object, the present invention provides an expansion bolt comprising: the bolt body is long and straight, a cone is formed at one end of the bolt body, and the caliber of the bottom of the cone is larger than the diameter of the bolt body; the sleeve is sleeved on the bolt body and wrapped on the vertebral body, and comprises a plurality of clamping pieces which are uniformly and equally arranged and used for clamping the vertebral body; the nut fixing piece penetrates through the bolt body, when the expansion bolt is inserted into the mounting hole, the nut fixing piece is screwed, so that the bolt body extends into the hole in the direction, the clamping piece is jacked open by the cone, the clamping piece expands outwards at the cone and is located between the bolt body and the deep hole, and the expansion bolt is expanded tightly by the clamping piece to complete mounting and fixing.
Preferably, the nut fixing member may include an upper nut and a lower nut, the upper nut is connected to the lower nut, a center of a top surface of the lower nut may form a recessed wedge, and a center of the wedge may coincide with a projection of a center of the lower nut in a horizontal direction; the bottom surface of the upper nut is provided with wedge-shaped ribs corresponding to the concave wedge openings, the wedge-shaped ribs can extend towards the bottom of the upper nut, and when the upper nut is connected with the lower nut, the wedge-shaped ribs can be inserted into the wedge openings, so that the upper nut and the lower nut are stably connected.
Further preferably, the center of the wedge rib may not coincide with the projection of the center of the upper nut in the horizontal direction, so that the wedge rib and the upper nut are in an eccentric structure.
Still further preferably, the bottom of the lower nut may be provided with a flat washer.
Preferably, the top end of each clip may be formed with a spherical relief, wherein when the expansion bolt is in a non-use state, the clip may wrap around and clamp the vertebral body, when the expansion bolt is in a use state, the vertebral body may push the clip open and cause the clip to expand outward, and the spherical relief of the clip may expand the expansion bolt with the deep hole.
Preferably, the bolt body may have a threaded portion formed on a surface thereof, the upper and lower nuts may have internal threads formed therein corresponding to the threaded portion, and the sleeve may have a thread formed thereon corresponding to the threaded portion.
According to the above description and practice, the sleeve is sleeved at the front end of the bolt body of the expansion bolt, and the sleeve comprises a plurality of clamping pieces, so that when the expansion bolt is in a non-use state, the clamping pieces wrap the cone at the front end of the bolt body, when the expansion bolt is in a use state, the expansion bolt and the sleeve are inserted into a deep hole drilled at an installation position in advance, the bolt is screwed, the cone formed at the front end of the bolt body can prop the clamping pieces open, the clamping pieces are provided with the segmental sphere protrusions, and the segmental sphere protrusions expand outwards to fill the space between the bolt body and the deep hole after the clamping pieces are propped open, so that the bolt body is expanded, and fixation is completed; on the other hand, the nut further comprises an upper nut and a lower nut, a concave wedge port is formed in the center of the top surface of the lower nut, a wedge rib is formed in the center of the bottom surface of the upper nut, the wedge rib is inserted into the concave wedge port to enable the upper nut and the lower nut to be connected stably, meanwhile, the concave wedge port is overlapped with the circle center of the lower nut, and the wedge rib and the upper nut are in an eccentric structure to further enable the upper nut and the lower nut to be connected stably; when the object needs to be dismantled, the dismantling work can be realized only by loosening the upper nut and the lower nut and drawing out the bolt body, and the dismantled expansion bolt can still be recycled. In conclusion, the expansion bolt has a simplified structure, is easy to realize, can effectively avoid the fracture or the loosening of the fixing piece fixed by the expansion bolt when the fixing piece is used for a long time or is frequently vibrated, ensures the use safety, and realizes the repeated disassembly and recycling of the expansion bolt so as to reduce the construction and maintenance cost.
Drawings
Fig. 1 is a sectional view showing a sectional structure of an expansion bolt according to an embodiment of the present invention in a non-use state;
fig. 2 is a sectional view showing a sectional structure of the expansion bolt shown in fig. 1 in a use state.
Detailed Description
Embodiments of the expansion bolt according to the present invention will be described below with reference to the accompanying drawings. Those of ordinary skill in the art will recognize that the described embodiments can be modified in various different ways, without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Furthermore, in the present description, the drawings are not to scale and like reference numerals refer to like parts.
Fig. 1 is a sectional view showing a sectional structure of an expansion bolt according to an embodiment of the present invention in a non-use state. As shown in fig. 1, the expansion bolt according to the embodiment of the present invention includes a bolt body 1, a sleeve 2 and a nut fixing member, which are sleeved on the bolt body 1.
Specifically, looking at fig. 1, the bolt body 1 is long and straight, and one end of the bolt body 1 forms a cone 11, and the caliber of the bottom surface of the cone 11 is larger than the diameter of the bolt body 1. The bolt body 1 has a threaded portion 12 formed on the surface thereof, and similarly, the sleeve 2 has a thread formed thereon in conformity with the threaded portion 12, and the nut holder has an internal thread formed thereon in conformity with the threaded portion 12, so that the bolt body 1 and the sleeve 2 can be pressed and fixed by tightening the nut holder.
The sleeve 2 is sleeved on the bolt body 1, the sleeve 2 is wrapped on the vertebral body 11, the sleeve 2 comprises a plurality of symmetrical clamping pieces 21, in the embodiment of the invention, the sleeve comprises four symmetrical clamping pieces 21, a spherical segment convex body 22 is formed at the end part of each clamping piece 21, when the expansion bolt is in a non-use state, each clamping piece 21 is wrapped on the vertebral body 11 and clamps the vertebral body 11, when the expansion bolt is in a use state, the vertebral body 11 pushes the clamping pieces open and enables the clamping pieces 21 to expand outwards, and the spherical segment convex bodies 22 of the clamping pieces 21 enable the expansion bolt to expand tightly with the deep hole. As described above, the caliber of the bottom surface of the vertebral body 11 is larger than the diameter of the bolt body 1, so that the clamping member 21 can be clamped by the bottom surface of the vertebral body 11 after being pushed open and expanded outwards to achieve the fixing effect.
The nut fixing piece comprises an upper nut 3, a lower nut 4 and a flat washer 5 arranged at the bottom of the lower nut 4, as shown in the figure, a concave wedge 41 is formed at the center of the top surface of the lower nut 4, the center of the wedge 41 coincides with the projection of the center of the lower nut 4 in the horizontal direction, that is, the center of the wedge 41 is concentric with the center of the lower nut 4, meanwhile, a wedge rib 31 corresponding to the concave wedge 41 is formed at the bottom surface of the upper nut 3, the wedge rib 31 extends towards the bottom of the upper nut 3 and can be inserted into the concave wedge 41 of the lower nut 4, so that when the upper nut 3 and the lower nut 4 are connected and fixed, the wedge rib 31 is inserted into the wedge 41 to realize the stable connection of the upper nut 3 and the lower nut 4. In addition, in this embodiment of the present invention, the projection of the center of the wedge rib 31 and the center of the upper nut 3 in the horizontal direction may not coincide, that is, the wedge rib 31 and the upper nut 3 are in an eccentric structure, so as to further enhance the structural stability when the upper nut 3 and the lower nut 4 are connected.
Fig. 2 is a sectional view showing a sectional structure of the expansion bolt shown in fig. 1 in a use state. As shown in FIG. 2, when the expansion bolt of one embodiment of the present invention is used to mount and fix a ceiling fan, the ceiling fan has a diameter of 2M, and is selected to be a 33 cm length M28 bolt, the length of the bottom cone is 2.5 cm, and the diameter of the bottom surface of the cone 11 is 25 mm. The wall thickness of the sleeve was 3 mm and the length was 26 cm. Comprising four clip pieces 21, each clip piece 21 being formed with a knob protrusion 22. During installation, a drilling device is adopted to drill a 26 cm deep hole in an installation position in advance, then a hole expanding device is adopted to expand the installation hole, the hole diameter is 5 cm, an expansion bolt is inserted into the deep hole after hole cleaning, the bolt body 1 is rotated, the clamping piece 21 on the sleeve 2 is ejected by the cone 11 at the bottom of the bolt body 1, the spherical segment convex body 22 on the clamping piece 21 is outwards expanded and is limited by the bottom surface of the cone 11, and therefore the hole cavity is expanded by the clamping piece. And then the flat washer 5, the lower nut 4 and the upper nut 3 are sequentially installed, the wedge-shaped rib 31 of the upper nut 3 is inserted into the wedge opening 41 of the lower nut 4 by rotating the nut, so that the upper nut 3 and the lower nut 4 are tightly attached, and the installation work is completed after the fixation and the stability are realized.
According to the above description and practice, the sleeve is sleeved at the front end of the bolt body of the expansion bolt, and the sleeve comprises a plurality of clamping pieces, so that when the expansion bolt is in a non-use state, the clamping pieces wrap the cone at the front end of the bolt body, when the expansion bolt is in a use state, the expansion bolt and the sleeve are inserted into a deep hole drilled at an installation position in advance, the bolt is screwed, the cone formed at the front end of the bolt body can prop the clamping pieces open, the clamping pieces are provided with the segmental sphere protrusions, and the segmental sphere protrusions expand outwards to fill the space between the bolt body and the deep hole after the clamping pieces are propped open, so that the bolt body is expanded, and fixation is completed; on the other hand, the nut further comprises an upper nut and a lower nut, a concave wedge port is formed in the center of the top surface of the lower nut, a wedge rib is formed in the center of the bottom surface of the upper nut, the wedge rib is inserted into the concave wedge port to enable the upper nut and the lower nut to be connected stably, meanwhile, the concave wedge port is overlapped with the circle center of the lower nut, and the wedge rib and the upper nut are in an eccentric structure to further enable the upper nut and the lower nut to be connected stably; when the object needs to be dismantled, the dismantling work can be realized only by loosening the upper nut and the lower nut and drawing out the bolt body, and the dismantled expansion bolt can still be recycled. In conclusion, the expansion bolt has a simplified structure, is easy to realize, can effectively avoid the fracture or the loosening of the fixing piece fixed by the expansion bolt when the fixing piece is used for a long time or is frequently vibrated, ensures the use safety, and realizes the repeated disassembly and recycling of the expansion bolt so as to reduce the construction and maintenance cost.
An expansion bolt according to the invention is described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the expansion bolt set forth above without departing from the spirit of the invention. Therefore, the scope of the present invention should be determined by the contents of the appended claims.
Claims (3)
1. An expansion bolt, characterized in that it comprises:
the bolt body is long and straight, a cone is formed at one end of the bolt body, and the caliber of the bottom of the cone is larger than the diameter of the bolt body;
the sleeve is sleeved on the bolt body and wrapped on the vertebral body, and comprises a plurality of symmetrically arranged clamping pieces which clamp the vertebral body;
the nut fixing piece penetrates through the bolt body, after the expansion bolt is inserted into the mounting hole, the nut fixing piece is screwed so that the bolt body extends into the hole, the clamping piece is jacked open by the cone, the clamping piece expands outwards at the cone and is positioned between the bolt body and the deep hole, the expansion bolt is expanded by the clamping piece to complete mounting and fixing,
the nut fixing piece comprises an upper nut and a lower nut, the upper nut is connected with the lower nut, a concave wedge port is formed in the center of the top surface of the lower nut, and the circle center of the wedge port is overlapped with the projection of the circle center of the lower nut in the horizontal direction; the bottom surface of the upper nut is provided with a wedge rib corresponding to the concave wedge opening, the wedge rib extends towards the bottom of the upper nut, when the upper nut is connected with the lower nut, the wedge rib is inserted into the wedge opening, so that the upper nut and the lower nut are stably connected,
wherein, a spherical segment convex body is formed at the top end of each clamping piece, when the expansion bolt is in a non-use state, the clamping pieces wrap the vertebral bodies and clamp the vertebral bodies, when the expansion bolt is in a use state, the clamping pieces are jacked open by the vertebral bodies and are expanded outwards, and the expansion bolt and the deep hole are expanded tightly by the spherical segment convex bodies of the clamping pieces,
the bolt body is provided with a threaded part on the surface, internal threads corresponding to the threaded part are formed in the upper nut and the lower nut, and the sleeve is provided with a screw thread corresponding to the threaded part.
2. The expansion bolt according to claim 1, wherein the center of the wedge rib and the center of the upper nut do not coincide in horizontal projection, so that the wedge rib and the upper nut are in an eccentric configuration.
3. The expansion bolt of claim 1, wherein the bottom of the lower nut is provided with a flat washer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811156631.7A CN109026936B (en) | 2018-09-30 | 2018-09-30 | Expansion bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811156631.7A CN109026936B (en) | 2018-09-30 | 2018-09-30 | Expansion bolt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109026936A CN109026936A (en) | 2018-12-18 |
| CN109026936B true CN109026936B (en) | 2020-09-22 |
Family
ID=64615792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811156631.7A Active CN109026936B (en) | 2018-09-30 | 2018-09-30 | Expansion bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109026936B (en) |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE833254A (en) * | 1975-09-10 | 1975-12-31 | PRE-EXPANDED PLASTIC ANCHOR, INTENDED FOR FIXING ON THIN WALLS, PLASTER PANELS, COMPRESSED MATERIALS | |
| DE3335628A1 (en) * | 1983-09-30 | 1985-04-04 | Hilti Ag, Schaan | SPREADING DOWEL WITH RETRACTABLE SPREADING BODY |
| CN2395077Y (en) * | 1998-04-24 | 2000-09-06 | 沈天仁 | Anti-loose nut |
| CN2440968Y (en) * | 2000-09-27 | 2001-08-01 | 戚进 | Adjustable screw rod style expansion screw |
| CN2537850Y (en) * | 2002-04-25 | 2003-02-26 | 石建峰 | High strength fixing expansion connection fastener |
| CN2572108Y (en) * | 2002-09-26 | 2003-09-10 | 天津理工学院 | Double locknut utilizing taper surface |
| CN2596094Y (en) * | 2003-01-13 | 2003-12-31 | 宋家君 | Repeatedlly used expansion bolt |
| CN1587725A (en) * | 2004-08-02 | 2005-03-02 | 马庆友 | Plastic clamp with expansion end |
| CN1587724A (en) * | 2004-08-02 | 2005-03-02 | 马庆友 | Hardware piece with expansion end and its matching spanners |
| CN2854170Y (en) * | 2005-11-08 | 2007-01-03 | 刘宇 | Limit expansion anchor bolt |
| CN200985940Y (en) * | 2006-12-14 | 2007-12-05 | 江苏江成冶金设备制造有限公司 | Screwed connection anti-loose fastener |
| CN201925291U (en) * | 2010-12-14 | 2011-08-10 | 黄献钲 | Improved wall nail structure |
| CN201953769U (en) * | 2011-03-11 | 2011-08-31 | 惠州智科实业有限公司 | Fixing screw structure for heat radiator |
| CN202152783U (en) * | 2011-07-30 | 2012-02-29 | 王英 | Combined expansion screw |
| CN102829052B (en) * | 2012-09-20 | 2014-09-17 | 力帆实业(集团)股份有限公司 | Fastening connecting component of vehicle plastic part |
| CN103322003A (en) * | 2013-07-09 | 2013-09-25 | 吴玲媛 | Fastening connector |
| CN204061439U (en) * | 2014-09-05 | 2014-12-31 | 卢明 | Without screw fixing device |
| CN107304780A (en) * | 2016-04-25 | 2017-10-31 | 李奇 | Expansion fastening device |
| CN106763049B (en) * | 2016-12-31 | 2019-03-05 | 中国工程物理研究院激光聚变研究中心 | Push away swollen drawing type flexible fastening connector |
-
2018
- 2018-09-30 CN CN201811156631.7A patent/CN109026936B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109026936A (en) | 2018-12-18 |
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