CN103615452A - Countersunk head type self-reaming expansion anchor bolt - Google Patents
Countersunk head type self-reaming expansion anchor bolt Download PDFInfo
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- CN103615452A CN103615452A CN201310641629.XA CN201310641629A CN103615452A CN 103615452 A CN103615452 A CN 103615452A CN 201310641629 A CN201310641629 A CN 201310641629A CN 103615452 A CN103615452 A CN 103615452A
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- expansion
- countersunk head
- head type
- screw
- screw rod
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Abstract
The invention discloses a countersunk head type self-reaming expansion anchor bolt which comprises a screw and an expansion tube. One end of the screw is provided with a countersunk head type inner hexagon screw hole. The expansion tube is arranged outside the screw in a sleeved mode. The other end of the screw is fixedly provided with a lift nut through threads. One end, close to the lift nut, of the expansion tube forms an expansion end which is provided with a plurality of expansion fissures. One side, towards the screw-in direction of the screw, of each expansion fissure forms a cutting edge. Protrusions are arranged on positions, corresponding to the expansion fissures, of the lift nut. Before the countersunk head type self-reaming expansion anchor bolt is used, only a straight hole needs to be prebored, and then through the arrangement of cutting edges, an accommodating hole with the same shape as the anchor bolt is directly formed in the installation process, so the binding force between the countersunk head type self-reaming expansion anchor bolt and a wall is firm and stable.
Description
Technical field
The present invention relates to a kind of expansion anchor, relate in particular to a kind of countersunk head type from reaming expansion anchor.
Background technique
Expansion anchor is expansion Lai He bearing by expansion tube such as generation such as mixed earth or the body of wall a kind of special thread link of bond stress to achieve a fixed connection that rub, and mainly contains two kinds, screw rod exposed conveying appliance and countersunk head type.Wherein, countersunk head type is generally comprised of screw rod, expansion tube and pad from reaming expansion anchor, and screw rod one end has interior hexagonal screw, and the other end has a lifting cap, and expansion tube is sheathed on outside screw rod, and forms inflating end near promoting cap one end.During use, first in bearing, such as making a call to a hole larger than expansion anchor itself on mixed earth or body of wall, be pre-drilled, then expansion anchor put in pre-drilled, the screw rod that beats afterwards expansion anchor makes it to enter in pre-drilled, due to percussion power effect, the expansion tube of expansion anchor is at pre-drilled bottom distending and push against pre-drilled and generation friction bond stress, then screw rod is tightened to locking, with this effect of achieving a fixed connection.But this countersunk head type from reaming expansion anchor because pre-drilled is generally bellmouth orifice, boring need to be carried out in two steps, subdrilling straight hole, in straight hole bottom, get out horn-like again, not only boring bothers, and does not still mate with expansion anchor shape the bottom of pre-drilled, therefore when the expansion tube distending of expansion anchor, understand excessive compression pre-drilled bottom periphery, to cause the mixed earth of this pre-drilled periphery or the cement in body of wall to come off, thereby make the friction bond stress between expansion tube and concrete or body of wall reduce suddenly even to disappear, then greatly affect the fastening mechanical characteristic of expansion anchor.In addition, when screwing the screw rod of this expansion anchor, screw rod can and the surface of contact interference of concrete or body of wall, cause loosening, thereby further affect expansion anchor fastening force.
Summary of the invention
In order to overcome above-mentioned defect, the invention provides a kind of countersunk head type from reaming expansion anchor, not only easy for installation, and also installation is rear and body of wall combination force is firm.
The present invention for the technological scheme that solves its technical problem and adopt is: a kind of countersunk head type is from reaming expansion anchor, comprise that one end is provided with screw rod and the expansion tube of hexagonal screw in countersunk head type, this expansion tube is sheathed on outside described screw rod, the other end of described screw rod sets firmly a lifting cap by screw thread, described expansion tube promotes cap one end near this and forms inflating end, this inflating end is provided with some extension fissures, described extension fissure forms cutting knife over against described screw rod precession direction one side, and the corresponding described extension fissure of described lifting cap position is provided with projection.
As a further improvement on the present invention, described projection is corresponding one by one with described extension fissure.
As a further improvement on the present invention, be also provided with an outer-hexagonal nut, this outer-hexagonal nut and described expansion tube are connected near interior hexagonal screw one end of described screw rod.
As a further improvement on the present invention, described expansion tube is provided with protuberance near interior hexagonal screw one end of described screw rod, and on described outer-hexagonal nut, correspondence is formed with breach, this outer-hexagonal nut with described expansion tube fixedly time described in protuberance engage with described breach.
As a further improvement on the present invention, being provided with in countersunk head type of described outer-hexagonal nut and described screw rod, between hexagonal screw one end, be provided with pad.
As a further improvement on the present invention, on described cutting knife, apply one deck diamond coatings.
The invention has the beneficial effects as follows: this countersunk head type only needs preboring straight hole before use from reaming expansion anchor, and by the setting of cutting knife, directly in installation process, form the receiving hole that shape is consistent, firm, firm with body of wall combination force.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is outer-hexagonal nut structure schematic diagram of the present invention;
Fig. 3 is expansion tube structural representation of the present invention;
Fig. 4 is lifting cap schematic diagram of the present invention;
Fig. 5 is that the present invention uses status architecture schematic diagram.
By reference to the accompanying drawings, make the following instructions:
1---screw rod 2---expansion tube
3---promoting cap 4---extension fissure
5---cutting knife 6---projection
7---outer-hexagonal nut 8---protuberance
9---breach 10---pad
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are elaborated, but protection scope of the present invention is not limited to following embodiment.
As Figure 1-4, a kind of countersunk head type is from reaming expansion anchor, comprise that one end is provided with screw rod 1, pad 10, outer-hexagonal nut 7 and the expansion tube 2 of hexagonal screw in countersunk head type, this expansion tube is sheathed on outside screw rod 1, the other end of screw rod is threaded connection a lifting cap 3, expansion tube promotes cap one end near this and forms inflating end, this inflating end is provided with some extension fissures 4, extension fissure forms cutting knife 5 over against screw rod precession direction one side, promote the corresponding extension fissure of cap position and be provided with projection 6, and the two is corresponding one by one.
Wherein, expansion tube is provided with protuberance 8 near interior hexagonal screw one end of screw rod, on outer-hexagonal nut, correspondence is formed with breach 9, this outer-hexagonal nut with expansion tube fixedly time protuberance 8 engage with breach 9, thereby realize being fixedly connected with between outer-hexagonal nut and expansion tube.Pad 10 is provided with in countersunk head type between hexagonal screw one end outer-hexagonal nut and screw rod, has locking functions.On cutting knife, apply one deck diamond coatings, can be used in the harder materials such as cutting cement.
This expansion anchor in use, can be participated in Fig. 5, according to following steps, carries out:
1. preboring one straight hole on body of wall or cement;
2. expansion anchor is inserted in straight hole;
3. fixing outer-hexagonal nut 7, expansion tube 2 is also fixed and can not rotates, and promotes cap because protruding stop can not rotate, and then precession screw rod 1, and promoting cap 3 will rise and extrusion expansion pipe makes its distending with bolt rotary;
4. High Rotation Speed outer-hexagonal nut 7, screw rod 1 is being followed 7 and is being rotated together, cutting knife carries out cutting action, and the cutting knife 5 on while expansion tube is continuous wall cutting or cement in precession process, until expansion tube below forms a cone shape hole consistent with expansion tube inflating end;
3. and 4. then can repeat as required step.
This expansion anchor can also freely be dismantled unwanted time, and during dismounting, fixedly hexagon nut 7, and reversion screw rod 1 promotes cap 3 and moves inward, and then departs from screw rod 1, realizes the dismounting of this expansion anchor.
As can be seen here, this expansion anchor when mounted, only need to bore a straight hole, and when mounted, by the cutting knife wall cutting on expansion tube or cement by preboring straight hole bottom form with expansion tube inflating end shape match shape, the shape that therefore metapore is installed is mated completely with expansion tube, and the stable mechanical property of the two combination is reliable, difficult drop-off.
Claims (6)
1. a countersunk head type is from reaming expansion anchor, comprise that one end is provided with screw rod (1) and the expansion tube (2) of hexagonal screw in countersunk head type, this expansion tube is sheathed on outside described screw rod, the other end of described screw rod sets firmly a lifting cap (3) by screw thread, described expansion tube promotes cap one end near this and forms inflating end, this inflating end is provided with some extension fissures (4), it is characterized in that: described extension fissure forms cutting knife (5) over against described screw rod precession direction one side, the corresponding described extension fissure of described lifting cap position is provided with projection (6).
2. countersunk head type according to claim 1, from reaming expansion anchor, is characterized in that: described projection is corresponding one by one with described extension fissure.
3. countersunk head type according to claim 1 and 2, from reaming expansion anchor, is characterized in that: be also provided with an outer-hexagonal nut (7), this outer-hexagonal nut and described expansion tube are connected near interior hexagonal screw one end of described screw rod.
4. countersunk head type according to claim 3 is from reaming expansion anchor, it is characterized in that: described expansion tube is provided with protuberance (8) near interior hexagonal screw one end of described screw rod, on described outer-hexagonal nut, correspondence is formed with breach (9), this outer-hexagonal nut with described expansion tube fixedly time described in protuberance engage with described breach.
5. countersunk head type according to claim 3, from reaming expansion anchor, is characterized in that: being provided with of described outer-hexagonal nut and described screw rod, be provided with pad (10) in countersunk head type between hexagonal screw one end.
6. countersunk head type according to claim 1 and 2, from reaming expansion anchor, is characterized in that: on described cutting knife, apply one deck diamond coatings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310641629.XA CN103615452A (en) | 2013-12-03 | 2013-12-03 | Countersunk head type self-reaming expansion anchor bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310641629.XA CN103615452A (en) | 2013-12-03 | 2013-12-03 | Countersunk head type self-reaming expansion anchor bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103615452A true CN103615452A (en) | 2014-03-05 |
Family
ID=50166166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310641629.XA Pending CN103615452A (en) | 2013-12-03 | 2013-12-03 | Countersunk head type self-reaming expansion anchor bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103615452A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113622617A (en) * | 2021-08-11 | 2021-11-09 | 有嘉(山东)新材料科技有限公司 | Plastic expansion pipe for fixing building hanging parts |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4702654A (en) * | 1985-10-03 | 1987-10-27 | Upat Gmbh & Co. | Spreading anchor |
| US4789284A (en) * | 1987-11-05 | 1988-12-06 | White Scott A | Self-cutting expansion anchor |
| CN1133948A (en) * | 1995-03-13 | 1996-10-23 | 株式会社游间工房 | Anchor unit with expansive anchor member expanded by utilizing turning force of bolt |
| US5911550A (en) * | 1996-12-16 | 1999-06-15 | Hilti Aktiengesellschaft | Self-cutting dowel |
| CN202851555U (en) * | 2012-04-17 | 2013-04-03 | 王春华 | Self-tangency hole reaming anchor bolt |
| CN202926786U (en) * | 2012-11-21 | 2013-05-08 | 刘平原 | Reinforced type undercut anchor bolt |
| CN203560242U (en) * | 2013-12-03 | 2014-04-23 | 居万里 | Countersunk head type self-reaming expansion anchor bolt |
-
2013
- 2013-12-03 CN CN201310641629.XA patent/CN103615452A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4702654A (en) * | 1985-10-03 | 1987-10-27 | Upat Gmbh & Co. | Spreading anchor |
| US4789284A (en) * | 1987-11-05 | 1988-12-06 | White Scott A | Self-cutting expansion anchor |
| CN1133948A (en) * | 1995-03-13 | 1996-10-23 | 株式会社游间工房 | Anchor unit with expansive anchor member expanded by utilizing turning force of bolt |
| US5911550A (en) * | 1996-12-16 | 1999-06-15 | Hilti Aktiengesellschaft | Self-cutting dowel |
| CN202851555U (en) * | 2012-04-17 | 2013-04-03 | 王春华 | Self-tangency hole reaming anchor bolt |
| CN202926786U (en) * | 2012-11-21 | 2013-05-08 | 刘平原 | Reinforced type undercut anchor bolt |
| CN203560242U (en) * | 2013-12-03 | 2014-04-23 | 居万里 | Countersunk head type self-reaming expansion anchor bolt |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113622617A (en) * | 2021-08-11 | 2021-11-09 | 有嘉(山东)新材料科技有限公司 | Plastic expansion pipe for fixing building hanging parts |
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Application publication date: 20140305 |