CN204739061U - From expanding end self tapping type crab -bolt - Google Patents
From expanding end self tapping type crab -bolt Download PDFInfo
- Publication number
- CN204739061U CN204739061U CN201520488785.1U CN201520488785U CN204739061U CN 204739061 U CN204739061 U CN 204739061U CN 201520488785 U CN201520488785 U CN 201520488785U CN 204739061 U CN204739061 U CN 204739061U
- Authority
- CN
- China
- Prior art keywords
- blind hole
- anchor pole
- bolt
- circular cone
- anchor
- 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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- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a from expanding end self tapping type crab -bolt, from expanding end self tapping type crab -bolt, including the stock, be equipped with the stock head on the rear end of stock, stock front end center is equipped with the blind hole, the blind hole inner wall on be equipped with logical groove, be provided with the circular cone post in the blind hole, the less end setting of circular cone post is in the blind hole. The characteristics of this kind of structure be through the circular cone post with stock bottom blind hole distending, carry out the reaming through the opening between two logical grooves to anchor hole bottom portion to the blind hole that makes form with the stock front end complex back taper tight fit that expands, make the whole crab -bolt to fix in the anchor downtheholely.
Description
Technical field
The utility model relates to a kind of crab-bolt, particularly a kind of from expanding end self-taped type crab-bolt.
Background technique
In prior art, cement anchor bolt, is directly drilled in anchor hole by the Thread Forming TF of its outside, and resists pull fastening force outside when outside tightening nut screws by screw thread with coordinating of anchor hole.But because concrete is more crisp, the part be screwed with crab-bolt in anchor hole is easily powdered to come off, and causes stretching resistance to decline.Meanwhile, also there is the tension effect being increased crab-bolt by expansion structure, but due to concrete fragility, in the large pulling force situation of moment, in expansion structure, directly destroy the concrete of anchor hole inwall, cause whole anchor pole to loosen.
Model utility content
The purpose of this utility model is deficiency in order to solve above-mentioned technology and provides one can automatically to carrying out enlarging at the bottom of anchor hole, and reach stable fixedly secure from expanding end self-taped type crab-bolt.
In order to achieve the above object, the end self-taped type crab-bolt of expansion certainly designed by the utility model, from expansion end self-taped type crab-bolt, comprise anchor pole, the rear end of anchor pole is provided with anchor pole head, and center, anchor pole front end is provided with blind hole, and described blind hole inwall is provided with groove, blind hole is provided with circular cone post, and the comparatively small end of circular cone post is arranged in blind hole.The feature of this structure is by blind hole distending bottom anchor pole by circular cone post, reaming is carried out to bottom anchor hole by the opening between two grooves, and the blind hole made forms the inverted cone swelling coordinated with anchor pole front end coordinates, whole crab-bolt is fixed in anchor hole.
In order to prevent being separated of circular cone post and blind hole, blind hole inwall is provided with locking teeth or screw thread.The sidewall of circular cone post also can be provided with locking teeth or screw thread.
In order to further increase anchoring effect, described anchor pole is Thread Forming TF from anchor pole head bottom, and this Thread Forming TF extends to the end face at blind hole place; Also can be described anchor pole be Thread Forming TF from anchor pole head bottom, this Thread Forming TF extends to the upper-end surface of groove; Can also be described anchor pole be Thread Forming TF from anchor pole head bottom, this Thread Forming TF extends to the upper-end surface of groove, and the anchor pole outer wall at blind hole place is provided with scraping tooth.
What the utility model obtained expands end self-taped type crab-bolt certainly, the cooperation devising fluting blind hole and circular cone post of innovation, by the fluting blind hole distending of circular cone post by the bottom of anchor pole, and by the opening of groove of fluting blind hole outside or scraping tooth to carrying out from expanding end effect bottom anchor hole, the mutual inverted cone-shaped structure coordinated is formed on final the make front end of anchor pole and the bottom of anchor hole, thus reaches the effect expanded from expanding the end.This structure operation is simple, has abandoned the reaming bottom installation method of complexity, high cost in the past, and the fiting effect that the reaming bottom reached expands.And structure is also different from expansion anchor in the past, realize expansion effect by circular cone post with contacting at the bottom of hole, but not expansion sleeve structure in the past, integrated operation is more simple and convenient.On the other hand, further contemplate the fastening relationships between circular cone post and fluting blind hole, be provided with locking teeth in the inside of fluting blind hole, avoid the problem that the whole expansion structure that causes due to the separation between circular cone post and fluting blind hole lost efficacy.
In sum, what the utility model obtained expands end self-taped type crab-bolt certainly, and have reasonable in design, easy to use, perforate cost is low, and anchor force is strong, the feature that especially tension pull out force is strong.
Accompanying drawing explanation
Fig. 1 is embodiment 1 structural representation of the present utility model.
Fig. 2 is the worm's eye view of embodiment 1 of the present utility model.
Fig. 3 is the structural representation of embodiment 2 of the present utility model.
Fig. 4 is the worm's eye view of embodiment 2 of the present utility model.
Fig. 5 is the structural representation of embodiment 3 of the present utility model.
Fig. 6 is the worm's eye view of embodiment 3 of the present utility model.
Embodiment
Below by embodiment, the utility model will be further described by reference to the accompanying drawings.
Embodiment 1:
As shown in Figure 1 and Figure 2, what the present embodiment described expands end self-taped type crab-bolt certainly, comprise anchor pole 1, the rear end of anchor pole 1 is provided with anchor pole head 2, center, anchor pole 1 front end is provided with blind hole 3, be Thread Forming TF 4 from anchor pole head 2 bottom, scraping tooth 5 is set after Thread Forming TF 4, scraping tooth 5 extends to the end face at blind hole 3 place, described blind hole 3 inwall is provided with groove 6, the length of the degree of depth of blind hole 3, the length of scraping tooth 5 and groove 6 is equal, and blind hole 3 is provided with circular cone post 7, and the comparatively small end of circular cone post 7 is arranged in blind hole 3.Described blind hole 3 inwall is provided with locking teeth 8.
During use, first circular cone post 7 is put into blind hole 3, then whole anchor pole 1 is aimed at anchor hole to screw in, utilize Thread Forming TF 4 that a part for anchor pole 1 is coordinated with anchor hole fixing, after anchor pole 1 screws in the certain degree of depth of anchor hole, circular cone post 7 touches bottom anchor hole, anchor pole 1 screws in further and makes anchor pole 1 blind hole 3 part start distending, reaming is carried out bottom scraping tooth 5 pairs of anchor holes of its outside, until cannot screw in further, now define the reaming of inverted cone bottom anchor hole, and in the form fit of anchor pole 1 front end.And when anchor pole 1 receives pulling force effect, the inverted cone-shaped structure of bottom will effectively stop the trend of the overall outwards motion of anchor pole 1.And the locking teeth 8 of blind hole 3 inside also can make blind hole 3 and circular cone post 7 effectively combine, prevent the inefficacy of bottom inverted cone-shaped structure.
Embodiment 2
As shown in Figure 3, Figure 4, what the present embodiment described expands end self-taped type crab-bolt certainly, and described anchor pole is Thread Forming TF 4 from anchor pole head 2 bottom, and this Thread Forming TF 4 extends to the upper-end surface of groove 6.
Embodiment 3
As shown in Figure 5, Figure 6, what the present embodiment described expands end self-taped type crab-bolt certainly, and described anchor pole is Thread Forming TF 4 from anchor pole head 2 bottom, and this Thread Forming TF 4 extends to the end face at blind hole 3 place.
Claims (6)
1., from expanding an end self-taped type crab-bolt, comprising anchor pole, the rear end of anchor pole is provided with anchor pole head, it is characterized in that center, anchor pole front end is provided with blind hole, described blind hole inwall is provided with groove, and blind hole is provided with circular cone post, and the comparatively small end of circular cone post is arranged in blind hole.
2. according to claim 1 from expanding end self-taped type crab-bolt, it is characterized in that described blind hole inwall is provided with locking teeth or screw thread.
3. according to claim 1 from expanding end self-taped type crab-bolt, it is characterized in that the sidewall of described circular cone post is provided with locking teeth or screw thread.
4. according to claim 1 from expanding end self-taped type crab-bolt, it is characterized in that described anchor pole is Thread Forming TF from anchor pole head bottom, this Thread Forming TF extends to the end face at blind hole place.
5. according to claim 1 from expanding end self-taped type crab-bolt, it is characterized in that described anchor pole is Thread Forming TF from anchor pole head bottom, this Thread Forming TF extends to the upper-end surface of groove.
6. according to claim 1 from expanding end self-taped type crab-bolt, it is characterized in that described anchor pole is Thread Forming TF from anchor pole head bottom, this Thread Forming TF extends to the upper-end surface of groove, and the anchor pole outer wall at blind hole place is provided with scraping tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520488785.1U CN204739061U (en) | 2015-07-09 | 2015-07-09 | From expanding end self tapping type crab -bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520488785.1U CN204739061U (en) | 2015-07-09 | 2015-07-09 | From expanding end self tapping type crab -bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204739061U true CN204739061U (en) | 2015-11-04 |
Family
ID=54420800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520488785.1U Expired - Fee Related CN204739061U (en) | 2015-07-09 | 2015-07-09 | From expanding end self tapping type crab -bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204739061U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112211892A (en) * | 2020-10-22 | 2021-01-12 | 常州大学 | Fastener capable of preventing loosening |
-
2015
- 2015-07-09 CN CN201520488785.1U patent/CN204739061U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112211892A (en) * | 2020-10-22 | 2021-01-12 | 常州大学 | Fastener capable of preventing loosening |
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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: 20151104 Termination date: 20200709 |