CN201513436U - Undercut anchor - Google Patents
Undercut anchor Download PDFInfo
- Publication number
- CN201513436U CN201513436U CN2009201962516U CN200920196251U CN201513436U CN 201513436 U CN201513436 U CN 201513436U CN 2009201962516 U CN2009201962516 U CN 2009201962516U CN 200920196251 U CN200920196251 U CN 200920196251U CN 201513436 U CN201513436 U CN 201513436U
- Authority
- CN
- China
- Prior art keywords
- extending
- extension
- sleeve pipe
- circular groove
- joint
- 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.)
- Expired - Fee Related
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- Joining Of Building Structures In Genera (AREA)
Abstract
The utility model relates to an undercut anchor, which comprises a screw rod and a casing. A nut is arranged at one end of the screw rod and an extending head is arranged at the other end. The casing is sheathed on a rod body between the nut and the extending head. An extending component is arranged at one end of the casing. The extending component and the casing are split-type. The extending component is formed by a connecting part and an extending part. The connecting part is inserted in the casing. The radial dimension of the extending part is larger than the radial dimension of the connecting part. The extending part faces right to the extending head. A plurality of gaps are axially arranged at the extending part and divide the extending part into a plurality of extending claws. A circumferential annular groove is arranged on the outer circle of the root of each extending claw, i.e. the connection position between the connecting part and the extending part. When in use, the extending claws are unfolded at the roots simultaneously and the unfolding angles are the same. Moreover, since the annular groove is provided, the roots of the extending claws are bended without forming wrinkles when the extending claws are unfolded, so stain of material is avoided. The utility model has the advantages of simple structure, firm anchorage and convenient use.
Description
Technical field
The utility model relates to a kind of reaming type crab-bolt.
Background technique
Existing reaming type crab-bolt structure is more, generally comprises screw rod and sleeve pipe, and an end of screw rod is provided with nut, and the other end is provided with extension header, and casing pipe sleeve is located on the body of rod between nut and the extension header, and an end of sleeve pipe is an extension member, and extension member is over against extension header; Extension member axially is provided with many slits, and many slits are divided into a plurality of expansion pawls with extension member.By squeezing bushing, the expansion pawl is strutted under prolate-headed effect when using, the mounting hole in expansion pawl and concrete interlock is mutually realized anchor.Expansion pawl and sleeve pipe joint were bent to form fold when the expansion pawl strutted, and can cause the strain of material; Simultaneously, also need bigger active force that the expansion pawl is strutted.In addition, the kink that the expansion pawl struts can be to form at random, and interlock is inhomogeneous mutually with mounting hole to cause each expansion pawl like this, is unfavorable for being anchored.
Summary of the invention
In order to solve the above technological deficiency that existing reaming type crab-bolt exists, the purpose of this utility model provides a kind of reaming type crab-bolt, and this crab-bolt has simple in structure, is anchored firmly characteristics easy to use.
In order to realize above-mentioned purpose, the utility model has adopted following technological scheme:
A kind of reaming type crab-bolt, this crab-bolt comprises screw rod and sleeve pipe, and an end of screw rod is provided with nut, and the other end is provided with extension header, and casing pipe sleeve is located on the body of rod between nut and the extension header, and an end of sleeve pipe is provided with extension member, and extension member and sleeve pipe are split type; Extension member is made of joint and extension, joint is plugged in the sleeve pipe, the extension radial dimension is greater than joint, the extension is over against extension header, and axially be provided with many slits in the extension, many the slit is slit into a plurality of expansion pawls with expansion, and the root of expansion pawl is that the outer ring, joint of joint and extension is provided with circumferential circular groove.
As preferably, the axial length of above-mentioned circular groove is 2～5mm, and radial depth is 0.1～0.5 of a joint wall thickness dimension.Adopt above-mentioned technological scheme, the angle that the expansion pawl is strutted can not form fold between 30 °～45 °, and the angle that struts of expansion pawl between 30 °～45 ° the time expansion pawl have snap-in force preferably with mounting hole in the concrete, the while can not cause the strain of material again.
As preferably, the inner in slit extends into circular groove, and the gap length that enters circular groove is 0.25～0.75 of a circular groove axial length.
As preferably, described slit is four or six.
The utility model has been owing to adopted above technological scheme, and pawl is same struts at root in expansion in the time of use, and the angle that struts is same; Simultaneously, the utlity model has circular groove, the root bending of expansion pawl can not form fold when the expansion pawl strutted, and had avoided the strain of material; The utlity model has simple in structurely, be anchored firmly characteristics easy to use.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is made a detailed explanation.
A kind of reaming type crab-bolt as shown in Figure 1, this crab-bolt comprises screw rod 1 and sleeve pipe 4, an end of screw rod 1 is provided with nut 3 and pad 4, the other end is provided with extension header 6, extension header 6 is provided with conical surface, and nut 3 is arranged on the outer end of pad 4, and sleeve pipe 4 is set on the body of rod between pad 4 and the extension header 6.
As shown in Figure 1, an end of sleeve pipe 4 is provided with extension member 11, and extension member 11 is split type with sleeve pipe 4; Extension member 11 is made of joint 9 and extension 10, joint 9 is plugged in the sleeve pipe 4, extension 10 radial dimensions are greater than joint 9, extension 11 is over against extension header 6, and 10 axially be provided with six slits 5 in the extension, article six, slit 5 is slit into six expansion pawls 8 with expansion, and the root of expansion pawl 8 is that the outer ring, joint of joint 9 and extension 10 is provided with circumferential circular groove 7.The axial length of circular groove 7 is 4mm, and radial depth is 0.25 of joint 9 wall thickness dimensions.The inner in slit 5 extends into circular groove 7, and the gap length that enters circular groove 7 is 0.5 of circular groove 7 axial lengths.
Claims (4)
1. reaming type crab-bolt, this crab-bolt comprises screw rod (1) and sleeve pipe (4), one end of screw rod (1) is provided with nut (2), the other end is provided with extension header (6), sleeve pipe (4) is set on the body of rod between nut (2) and the extension header (6), it is characterized in that: an end of sleeve pipe (4) is provided with extension member (11), and extension member (11) is split type with sleeve pipe (4); Extension member (11) is made of joint (9) and extension (10), joint (9) is plugged in the sleeve pipe (4), extension (10) radial dimension is greater than joint (9), extension (10) is over against extension header (6), and in the extension (10) axially are provided with many slits (5), many slits (5) are divided into a plurality of expansion pawls (8) with extension (10), and the root outer ring of expansion pawl (8) is provided with circumferential circular groove (7).
2. a kind of reaming type crab-bolt according to claim 1 is characterized in that: the axial length of circular groove (7) is 2～5mm, and radial depth is 0.1～0.5 of joint (a 9) wall thickness dimension.
3. a kind of reaming type crab-bolt according to claim 1 and 2 is characterized in that: the inner of slit (5) extends into circular groove (7), and the gap length that enters circular groove (7) is 0.25～0.75 of circular groove (a 7) axial length.
4. a kind of reaming type crab-bolt according to claim 1 and 2 is characterized in that: described slit (5) are four or six.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201962516U CN201513436U (en) | 2009-09-17 | 2009-09-17 | Undercut anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201962516U CN201513436U (en) | 2009-09-17 | 2009-09-17 | Undercut anchor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201513436U true CN201513436U (en) | 2010-06-23 |
Family
ID=42484843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201962516U Expired - Fee Related CN201513436U (en) | 2009-09-17 | 2009-09-17 | Undercut anchor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201513436U (en) |
-
2009
- 2009-09-17 CN CN2009201962516U patent/CN201513436U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20100623 Termination date: 20140917 |
|
| EXPY | Termination of patent right or utility model |