CN208845531U - Hollow belt tooth expansion tube - Google Patents
Hollow belt tooth expansion tube Download PDFInfo
- Publication number
- CN208845531U CN208845531U CN201821415064.8U CN201821415064U CN208845531U CN 208845531 U CN208845531 U CN 208845531U CN 201821415064 U CN201821415064 U CN 201821415064U CN 208845531 U CN208845531 U CN 208845531U
- Authority
- CN
- China
- Prior art keywords
- expansion tube
- hole
- expansion
- hollow
- tube body
- 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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- Orthopedics, Nursing, And Contraception (AREA)
Abstract
The utility model discloses a kind of hollow belt tooth expansion tubes, including expanding tube body, central through hole is equipped in the expansion tube body, the inner wall of the central through hole is equipped at least one reinforcing rib for being in axial direction arranged and extending radially inwardly, and the reinforcing rib is equipped at least one engaging tooth in axial direction extended.In use, first expansion tube body is placed in the preformed hole of cavity, screw is then shot；During shooting screw, the lesser screw head of outer diameter is first shot in central through hole, and then the biggish screw section of outer diameter is shot on the basis of reinforcing rib again, under the action of reinforcing rib, the expansion amplitude of expansion tube body can effectively be increased, increase the friction between expansion tube body and wall；In addition, during shooting screw, screw with engage tooth engagement, expansion tube body can be driven to rotate in preformed hole by screw, make to expand tube body and be distorted deformation, to reach the technical purpose that torsion fastens.
Description
Technical field
The utility model relates to a kind of fasteners, are specifically a kind of hollow belt tooth expansion tube.
Background technique
Plastic dowel sleeve is used to fasten the connection and installation of various middle group pendant articles, matches with self-tapping screw.
When plastic dowel sleeve is installed, pre-manufactured hole is drilled out on wall according to plastic expansion pipe size, outside the size and expansion tube of pre-manufactured hole
Diameter one is to the length of pre-manufactured hole is usually than plastic expansion pipe range 5mm-7mm.Then matched self-tapping screw is put into plastic expansion
In the fixed section of pipe, the length of self-tapping screw is that the length of plastic dowel sleeve adds the thickness for needing to hang detent, self-tapping screw
Outer diameter is consistent with the internal diameter of plastic dowel sleeve inlet.Then tapping compressing is shot to the expansion of plastic dowel sleeve using tool
Section, makes expansion arc spreading and fits closely with the hole wall of pre-manufactured hole on wall, reach required anchor force.
Although existing plastic dowel sleeve can satisfy requirement to a certain extent, there are function it is more single lack
Point, during practice, it is often necessary to replace different expansion tubes to adapt to different walls.
Summary of the invention
In view of this, fastened the purpose of this utility model is to provide a kind of hollow belt tooth expansion tube, it can be achieved that reversing, and
It is applicable to a variety of different walls.
In order to achieve the above objectives, the utility model provides the following technical solutions:
A kind of hollow belt tooth expansion tube, including expansion tube body, equipped with central through hole in the expansion tube body, it is described in
The inner wall of heart through-hole is equipped at least one reinforcing rib for being in axial direction arranged and extending radially inwardly, and sets on the reinforcing rib
There is at least one engaging tooth in axial direction extended.
Further, the expansion tube body includes the head for being located at front end, positioned at the tail portion of rear end and positioned at the head
Interlude between tail portion.
Further, annular is laid at least two dilatation joints on the interlude, between adjacent two dilatation joints
Form expansion piece.
Further, the reinforcing rib is equipped on the inner wall per a piece of expansion piece.
Further, the back-off tooth to extend radially outwardly is equipped on the outer wall per a piece of expansion piece.
Further, hollow hole group is correspondingly provided on the head with dilatation joint described in each, the hollow hole group includes
In axial direction spaced hollow hole, the hollow hole include two sections of straight hole sections that are connected, and two sections of straight hole sections are symmetrical
Setting, and the plane of symmetry between two sections of straight hole sections is coplanar with the plane of symmetry of the dilatation joint.
Further, in the hollow hole, the connected position of two sections of straight hole sections is apart from expansion arc body head end
The distance in face is less than the distance of other positions of the hollow hole apart from expansion arc body head end face.
Further, annular is laid with fixed tooth on the periphery wall of the tail portion.
Further, the radial height of the fixed tooth is gradually reduced along the direction that head is directed toward in the tail portion.
The utility model has the beneficial effects that:
The hollow belt tooth expansion tube of the utility model, sets by the way that reinforcing rib is arranged in central through hole, and on reinforcing rib
Engaging tooth is set, in use, first expansion tube body is placed in the preformed hole of cavity, then shoots screw；Shoot the mistake of screw
Cheng Zhong, the lesser screw head of outer diameter are first shot in central through hole, and then the biggish screw section of outer diameter is again on the basis of reinforcing rib
On shoot, under the action of reinforcing rib, can effectively increase the expansion amplitude of expansion tube body, increase expansion tube body and wall
Between friction；In addition, during shooting screw, screw with engage tooth engagement, screw driving expansion tube body can be passed through
It is rotated in preformed hole, makes to expand tube body and be distorted deformation, to reach the technical purpose that torsion fastens.
Detailed description of the invention
In order to keep the purpose of this utility model, technical scheme and beneficial effects clearer, the utility model provides as follows
Attached drawing is illustrated:
Fig. 1 is the structural schematic diagram of the utility model hollow belt tooth expansion tube embodiment.
Fig. 2 is the A-A cross-sectional view of Fig. 1；
Fig. 3 is the B-B cross-sectional view of Fig. 1；
Fig. 4 is the perspective view of the present embodiment hollow belt tooth expansion tube.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, so that those skilled in the art
The utility model can be better understood and can be practiced, but illustrated embodiment is not as the restriction to the utility model.
As shown in Figure 1, being the structural schematic diagram of the utility model hollow belt tooth expansion tube embodiment.The present embodiment it is hollow
Band tooth expansion tube, including expansion tube body, expansion tube body is interior to be equipped with central through hole 1, and the inner wall of central through hole 1 is equipped at least
One reinforcing rib 2 for being in axial direction arranged and extending radially inwardly, reinforcing rib 2 are equipped at least one and in axial direction extend
Engaging tooth 3.The reinforcing rib 2 of the present embodiment is equipped with two engaging tooths 3 in axial direction extended.
Further, the expansion tube body of the present embodiment includes the head 4 positioned at front end, the tail portion 5 positioned at rear end and is located at
Interlude 6 between head 4 and tail portion 5.Annular is laid at least two dilatation joints 7, adjacent two dilatation joints on interlude 6
Expansion piece 8 is formed between 7.The dilatation joint 7 of the present embodiment is set as two, correspondingly, expansion piece 8 is set as two, reinforcing rib 2
It is also configured as two.According to actual needs, dilatation joint 7 may be arranged as 3 and 3 or more, and principle is suitable, no longer tired
It states.
Further, it is equipped with reinforcing rib 2 on the inner wall per a piece of expansion piece 8, and is all provided on the outer wall per a piece of expansion piece 8
There is the back-off tooth 9 to extend radially outwardly.It after 8 radial outward expansion of expansion piece, is buckled between tooth 9 and preformed hole and engages, improve anti-
Pulling capacity.
Further, it is correspondingly provided with hollow hole group with each dilatation joint 7 on the head 4 of the present embodiment, hollow hole group includes
In axial direction spaced hollow hole 10, hollow hole 10 include two sections of straight hole sections that are connected, and two sections of straight hole sections are symmetrical arranged,
And the plane of symmetry between two sections of straight hole sections is coplanar with the plane of symmetry of dilatation joint 7.And in hollow hole 10, the connected portion of two sections of straight hole sections
Distance of the position apart from expansion arc body head end face be less than other positions of the hollow hole apart from expansion arc body head end face away from
From.
Further, annular is laid with fixed tooth 11 on the periphery wall of the tail portion 5 of the present embodiment.The radial height of fixed tooth
It is gradually reduced along the direction that head 4 is directed toward in tail portion 5.Fixed tooth is engaged with preformed hole, after screw is shot completely, improves anti-rotation
Kinetic force prevents expansion tube from rotating in preformed hole.
The hollow belt tooth expansion tube of the present embodiment, is arranged by the way that reinforcing rib is arranged in central through hole, and on reinforcing rib
Engaging tooth then shoots screw in use, first expansion tube body is placed in the preformed hole of cavity；Shoot the process of screw
In, the lesser screw head of outer diameter is first shot in central through hole, and then the biggish screw section of outer diameter is again on the basis of reinforcing rib
Shoot, under the action of reinforcing rib, can effectively increase expansion tube body expansion amplitude, increase expansion tube body and wall it
Between friction；In addition, during shooting screw, screw with engage tooth engagement, expansion tube body can be driven to exist by screw
Rotation in preformed hole makes to expand tube body and is distorted deformation, to reach the technical purpose that torsion fastens.
Embodiment described above is only preferred embodiments for fully illustrating the utility model, the utility model
Protection scope it is without being limited thereto.Those skilled in the art made equivalent substitute or change on the basis of the utility model
It changes, both is within the protection scope of the present invention.The protection scope of the utility model is subject to claims.
Claims (9)
1. a kind of hollow belt tooth expansion tube, including expansion tube body, the expansion tube body is interior to be equipped with central through hole (1), special
Sign is: the inner wall of the central through hole (1) is equipped at least one reinforcement for being in axial direction arranged and extending radially inwardly
Muscle (2), the reinforcing rib (2) are equipped at least one engaging tooth (3) in axial direction extended.
2. hollow belt tooth expansion tube according to claim 1, it is characterised in that: the expansion tube body includes being located at front end
Head (4), the interlude (6) positioned at the tail portion (5) of rear end and between the head (4) and tail portion (5).
3. hollow belt tooth expansion tube according to claim 2, it is characterised in that: annular is laid on the interlude (6)
There are at least two dilatation joints (7), forms expansion piece (8) between adjacent two dilatation joints (7).
4. hollow belt tooth expansion tube according to claim 3, it is characterised in that: the inner wall per a piece of expansion piece (8)
On be equipped with the reinforcing rib (2).
5. hollow belt tooth expansion tube according to claim 3 or 4, it is characterised in that: outer per a piece of expansion piece (8)
The back-off tooth (9) to extend radially outwardly is equipped on wall.
6. hollow belt tooth expansion tube according to claim 3, it is characterised in that: on the head (4) and described in each
Dilatation joint (7) is correspondingly provided with hollow hole group, and the hollow hole group includes in axial direction spaced hollow hole (10), described
Hollow hole (10) includes two sections of straight hole sections that are connected, and two sections of straight hole sections are symmetrical arranged, and between two sections of straight hole sections
The plane of symmetry is coplanar with the plane of symmetry of the dilatation joint (7).
7. hollow belt tooth expansion tube according to claim 6, it is characterised in that: in the hollow hole (10), described in two sections
Distance of the connected position of straight hole section apart from expansion arc body head end face is less than other position distances of the hollow hole
The distance of dilatation joint body head end face.
8. according to claim 2-4, the described in any item hollow belt tooth expansion tubes of 6-7, it is characterised in that: the tail portion (5)
Annular is laid with fixed tooth (11) on periphery wall.
9. hollow belt tooth expansion tube according to claim 8, it is characterised in that: the radial height of the fixed tooth is along institute
The direction for stating tail portion (5) direction head (4) is gradually reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821415064.8U CN208845531U (en) | 2018-08-30 | 2018-08-30 | Hollow belt tooth expansion tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821415064.8U CN208845531U (en) | 2018-08-30 | 2018-08-30 | Hollow belt tooth expansion tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208845531U true CN208845531U (en) | 2019-05-10 |
Family
ID=66357809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821415064.8U Expired - Fee Related CN208845531U (en) | 2018-08-30 | 2018-08-30 | Hollow belt tooth expansion tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208845531U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110886754A (en) * | 2019-12-05 | 2020-03-17 | 马鞍山钢铁股份有限公司 | Self-damage expansion screw |
-
2018
- 2018-08-30 CN CN201821415064.8U patent/CN208845531U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110886754A (en) * | 2019-12-05 | 2020-03-17 | 马鞍山钢铁股份有限公司 | Self-damage expansion screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190510 Termination date: 20210830 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |