CN203560242U - Countersunk head type self-reaming expansion anchor bolt - Google Patents
Countersunk head type self-reaming expansion anchor bolt Download PDFInfo
- Publication number
- CN203560242U CN203560242U CN201320787372.4U CN201320787372U CN203560242U CN 203560242 U CN203560242 U CN 203560242U CN 201320787372 U CN201320787372 U CN 201320787372U CN 203560242 U CN203560242 U CN 203560242U
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- expansion
- countersunk head
- head type
- screw
- screw rod
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Abstract
The utility model discloses a countersunk head type self-reaming expansion anchor bolt which comprises a screw and an expansion pipe. One end of the screw is provided with a countersunk head type internal hexagon screw hole, the expansion pipe is sleeved outside the screw, and a lifting cap is fixedly arranged at the other end of the screw through a thread. One end, close to the lifting cap, of the expansion pipe forms an expansion end; a plurality of expansion cracks are arranged at the expansion end; a cutting tool edge is formed on one side, directly facing the screw screw-in direction, of each expansion crack; a protrusion is arranged at the position, corresponding to each expansion crack, of the lifting cap. Before use of the countersunk head type self-reaming expansion anchor bolt, a straight hole only needs to be predrilled, accommodating holes identical in shape are directly formed in the mounting process due to the arrangement of the cutting tool edges, and force of binding with the wall is form and stable.
Description
Technical field
The utility model relates to a kind of expansion anchor, relates in particular to a kind of countersunk head type from reaming expansion anchor.
Background technique
Expansion anchor, be expansion by expansion tube come and bearing 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, mainly contain 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 trouble of boring, and does not still mate with expansion anchor shape the bottom of pre-drilled, therefore meeting excessive compression pre-drilled bottom periphery when the expansion tube distending of expansion anchor, to cause the cement in mixed earth or the body of wall of this pre-drilled periphery 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 utility model provides a kind of countersunk head type from reaming expansion anchor, not only easy for installation, and installation is rear and body of wall combination force is firm.
The utility model 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 forms inflating end near this lifting cap one end, this inflating end is provided with some extension fissures, described extension fissure just forms cutting knife to described screw rod precession direction one side, and the corresponding described extension fissure of described lifting cap position is provided with projection.
As further improvement of the utility model, described projection is corresponding one by one with described extension fissure.
As further improvement of the utility model, 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 further improvement of the utility model, described expansion tube is provided with protuberance near interior hexagonal screw one end of described screw rod, on described outer-hexagonal nut, correspondence is formed with breach, when this outer-hexagonal nut and described expansion tube are fixing described in protuberance engage with described breach.
As further improvement of the utility model, 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 further improvement of the utility model, on described cutting knife, apply one deck diamond coatings.
The beneficial effects of the utility model are: 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 utility model;
Fig. 2 is outer-hexagonal nut structure schematic diagram described in the utility model;
Fig. 3 is expansion tube structural representation described in the utility model;
Fig. 4 is lifting cap schematic diagram described in the utility model;
Fig. 5 is that the utility model is used 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, preferred embodiment of the present utility model is elaborated, but protection domain of the present utility model 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 forms inflating end near this lifting cap one end, this inflating end is provided with some extension fissures 4, extension fissure just forms cutting knife 5 to 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, and when this outer-hexagonal nut is fixing with expansion tube, protuberance 8 engages with breach 9, thereby realizes 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. fix outer-hexagonal nut 7, expansion tube 2 is also fixed and can not rotates, promote cap because protruding stop can not rotate, then precession screw rod 1, promote cap 3 will with bolt rotary rise and extrusion expansion pipe make its distending;
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 continuous wall cutting or the cement in precession process of the cutting knife 5 on expansion tube simultaneously, 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, during dismounting, can fix 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 forms inflating end near this lifting cap one end, this inflating end is provided with some extension fissures (4), it is characterized in that: described extension fissure just forms cutting knife (5) to 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), when this outer-hexagonal nut and described expansion tube are fixing 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 |
|---|---|---|---|
| CN201320787372.4U CN203560242U (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 |
|---|---|---|---|
| CN201320787372.4U CN203560242U (en) | 2013-12-03 | 2013-12-03 | Countersunk head type self-reaming expansion anchor bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203560242U true CN203560242U (en) | 2014-04-23 |
Family
ID=50509965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320787372.4U Expired - Fee Related CN203560242U (en) | 2013-12-03 | 2013-12-03 | Countersunk head type self-reaming expansion anchor bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203560242U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615452A (en) * | 2013-12-03 | 2014-03-05 | 居万里 | Countersunk head type self-reaming expansion anchor bolt |
| CN104963930A (en) * | 2015-07-08 | 2015-10-07 | 常州市零伍壹玖电子有限公司 | Stainless steel expansion screw for sports device |
| CN108006039A (en) * | 2017-11-30 | 2018-05-08 | 郭金燕 | A kind of expansion bolt of Fast Installation |
-
2013
- 2013-12-03 CN CN201320787372.4U patent/CN203560242U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615452A (en) * | 2013-12-03 | 2014-03-05 | 居万里 | Countersunk head type self-reaming expansion anchor bolt |
| CN104963930A (en) * | 2015-07-08 | 2015-10-07 | 常州市零伍壹玖电子有限公司 | Stainless steel expansion screw for sports device |
| CN108006039A (en) * | 2017-11-30 | 2018-05-08 | 郭金燕 | A kind of expansion bolt of Fast Installation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140423 Termination date: 20201203 |