CN208966800U - A kind of pre-embedded bolt - Google Patents
A kind of pre-embedded bolt Download PDFInfo
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- CN208966800U CN208966800U CN201821529378.0U CN201821529378U CN208966800U CN 208966800 U CN208966800 U CN 208966800U CN 201821529378 U CN201821529378 U CN 201821529378U CN 208966800 U CN208966800 U CN 208966800U
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- stem
- support plate
- connecting cylinder
- embedded bolt
- expansion device
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Abstract
The utility model provides a kind of pre-embedded bolt, it includes stem, connecting cylinder, support plate and expansion device, the stem passes through the support plate and is inserted in the connecting cylinder, and the stem is threadedly coupled with the connecting cylinder, the support plate is slideably sheathed on the stem, the expansion device is sheathed on the stem, and the expansion device is between the support plate and the connecting cylinder, the both ends of the expansion device are abutted against at the top of the bottom of the support plate and the connecting cylinder respectively, location nut is equipped on the stem, the location nut is set at the top of the support plate, the location nut pushes support plate to move downward, so that the expansion device is radially expanded.The pre-embedded bolt can expand during the installation process, realize accurately positioning, and be fixed by casting concrete on it, to guarantee that its connection between fixture is reliable, and can effectively avoid that there is a phenomenon where bolt fallings.
Description
Technical field
The utility model relates to a kind of screw device field more particularly to a kind of pre-embedded bolts.
Background technique
Currently, in building, construction process, it usually needs use pre-embedded bolt, pre-embedded bolt is got to ground
Or the Kong Zhonghou on metope, the nut to screw up with a wrench on pre-embedded bolt, bolt walks toward outside, and the metallic sheath of outside is not
Dynamic, then, the major part under bolt can make metallic sheath spreading in the entire hole of its overflow, at this point, pre-embedded bolt is just taken out not
Out, promote expansion to generate friction bond stress using wedge gradient, reach fixed effect.But common pre-embedded bolt
At work, the depth and contact area inlayed mutually between bolt and metallic sheath are extremely limited, pass through during the installation process
It often will appear and expand not tight phenomenon, so that it is fixed very unreliable, if load has biggish vibration, it is very easy to cause
Pre-embedded bolt is easy to fall off from cavity or affixed object, causes the accident.
Utility model content
It, can be the purpose of this utility model is to provide a kind of pre-embedded bolt based on above-mentioned the deficiencies in the prior art
It is expanded in installation process, realizes accurately positioning, and be fixed by casting concrete on it, to guarantee it and consolidate
Connection between earnest is reliable, and can effectively avoid that there is a phenomenon where bolt fallings.
Based on this, a kind of the technical solution of the utility model are as follows: pre-embedded bolt comprising stem, connecting cylinder, support plate and
Expansion device, the stem pass through the support plate and are inserted in the connecting cylinder, and the stem and the connecting cylinder screw thread
Connection, the support plate are slideably sheathed on the stem, and the expansion device is sheathed on the stem, and described swollen
Swollen device is between the support plate and the connecting cylinder, the both ends of the expansion device bottom with the support plate respectively
It is abutted against at the top of the connecting cylinder, location nut is equipped on the stem, the location nut is set to described
At the top of support plate, the location nut pushes support plate to move downward, so that the expansion device is radially expanded.
Optionally, the expansion device includes resilient sleeve, and the resilient sleeve fixing sleeve is set on the stem, and institute
The both ends for stating resilient sleeve are abutted against at the top of the bottom of the support plate and the connecting cylinder respectively.
Optionally, the expansion device further includes fixed column, and the fixed column is sheathed on the stem, and with the core
Male screw connects, and abuts against at the top of the bottom of the fixed column and the connecting cylinder, and the fixed column fixation is embedded at described
In resilient sleeve.
Optionally, the height of the fixed column is less than the height of the resilient sleeve.
Optionally, the inner wall of the expansion sleeve is mutually be bonded with the outer wall of the fixed column.
Optionally, the fixed column is located at the bottom of resilient sleeve, and circumferentially arranged with more on the outer wall of the fixed column
A groove.
Optionally, the resilient sleeve is rubber bush.
Optionally, the outer wall of the lower end of the stem is equipped with external screw thread, the connecting cylinder inner wall be equipped with it is described outer
The lower end of the internal screw thread that screw thread matches, the stem is cooperatively connected in the connecting cylinder.
Optionally, the support plate is equipped with through-hole corresponding with the stem, and the stem is arranged in the through-hole
It is interior.
Optionally, the pre-embedded bolt further includes locating shim, and the locating shim is sheathed on the stem, the branch
Fagging is set between the location nut and the locating shim, and the upper surface of the support plate offsets with institute location nut
It connects, the lower surface of the support plate is abutted against with the locating shim.
Implement the utility model embodiment, has the following beneficial effects:
The pre-embedded bolt structure of the utility model is simple, easy to use, and during the installation process, connecting cylinder insertion is consolidated
It is fixed, displacement of the support plate on stem is controlled by positioning bolt so that the upper end of support plate and connecting cylinder on stem it
Between distance be gradually reduced so that expansion device gradually reduce after being compressed until generate expansion, compressed expansion
Device can generate bounce in the axial direction, so that connecting cylinder is reliably fixed, to realize reliable positioning function,
The displacement that support plate moves downward on stem is bigger, and the degrees of expansion of pre-embedded bolt is higher, thus, it is possible to make connecting cylinder with
Connection between fixture is relatively reliable and stablizes, then is fixed by way of casting concrete on it, can be effective
Avoid that there is a phenomenon where bolt fallings.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of pre-embedded bolt described in the utility model embodiment.
Description of symbols:
1, stem, 11, cylinder, 12, nut, 13, connecting plate, 2, connecting cylinder, 3, support plate, 4, expansion device, 41, elasticity
Sleeve, 42, fixed column, 421, groove, 5, location nut, 6, locating shim, 7, elastic washer.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
In the description of the present invention, it should be understood that the orientation of the instructions such as term " on ", "lower", "left", "right"
Or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model and simplification is retouched
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it should not be understood as limiting the present invention.
Referring to Fig. 1, pre-embedded bolt described in this preferred embodiment includes stem 1, connecting cylinder 2, support plate 3 and expansion device
4, the stem 1 passes through the support plate 3 and is inserted in the connecting cylinder 2, and the stem 1 and 2 screw thread of connecting cylinder connect
It connects, the support plate 3 is slideably sheathed on the stem 1, and the expansion device 4 is sheathed on the stem 1, and described
Expansion device 4 between the support plate 3 and the connecting cylinder 2, the both ends of the expansion device 4 respectively with the support plate
3 bottom and the top of the connecting cylinder 2 abut against, and location nut 5, the location nut 5 are equipped on the stem 1
It is set to 3 top of support plate, the location nut 6 pushes support plate 3 to move downward, so that the expansion device 4 occurs
It is radially expanded.
Based on the above structure, carry out to the pre-embedded bolt in use, by the inside of 2 fixture of connecting cylinder of pre-embedded bolt
Installation fixation is carried out, entire pre-embedded bolt is enabled effectively to bear pulling force to meet requirement, by stem 1 and connecting cylinder
2 be effectively reliably fixedly connected, using spanner or other tools to location nut 5 on stem 1 gradually downward, and push
Support plate 3 is close to connecting cylinder 2, so that the distance between support plate 3 and connecting cylinder 2 are gradually reduced, due to expansion device 4
Both ends abutted against respectively with the bottom of support plate 3 and the top of connecting cylinder 2, so the distance between support plate 3 and connecting cylinder 2
It reduces so that expansion device 4 is squeezed, to be radially expanded, generation fixed force is filled by expansion during the installation process
The lower part of the pre-embedded bolt is firmly fixed on the inside of fixture by the expansion for setting 4, so that pre-embedded bolt is able to bear pulling force etc.
The expansion device 4 for meeting requirement, and being extruded can also generate the elastic force replied respectively to both ends in axial direction, the elastic force
The stability that can then guarantee the connecting cylinder 2 being connected with fixture, prevent connecting cylinder 2 be attached with fixture be occur
It shakes.After the lower part of the pre-embedded bolt is fixed inside fixture, then in the upper part of support plate 3 progress concrete
Pour, guarantee the reliability of overall work.
Wherein, expansion device 4 includes resilient sleeve 41, and 41 fixing sleeve of resilient sleeve is set on stem 1, and resilient sleeve 41
Top of the both ends respectively with the bottom of support plate 3 and connecting cylinder 2 abut against, the distance between connecting cylinder 2 and support plate 3 subtract
It is few, extruding force effectively is generated to resilient sleeve 41, swelling occurs in middle part after guaranteeing 41 Stepwize Shrink of resilient sleeve, elasticity
The elastic force of sleeve 41 can then guarantee the connection structure between the structure and connecting cylinder 2 and fixture on 3 top of support plate more
It is effective to stablize.Expansion device 4 further includes fixed column 42, and fixed column 42 is sheathed on stem 1, and is threadedly coupled with stem 1, Gu
The bottom of fixed column 42 and the top of connecting cylinder 2 abut against, fixed column 42 fixation is embedded in resilient sleeve 41, fixed column 42 it is interior
Portion is equipped with the internal screw thread matched with the external screw thread on stem 1, and the bottom of the fixed column 42 is resisted against the upper end of connecting cylinder 2
Portion, stem 1 and fixed column 42 are threadedly engaged when being attached, and fixed column 42 is supported resilient sleeve 41, fixed column 42
Height is less than the height of resilient sleeve 41, enables and keeps certain gap between the resilient sleeve 41 of part and stem 1,
The space expanded for resilient sleeve 41 can be obtained when moving down under the promotion of positioning bolt 5 to support plate 3, it prevents
Contact between resilient sleeve 41 and stem 1 increases its frictional force in compression, the top half and stem 1 of resilient sleeve 41
Between the gap that is arranged be region that the resilient sleeve 41 expands, convenient for effectively in the use process of pre-embedded bolt
It is positioned.The mode being fixedly connected between the inside of resilient sleeve 41 and the outside of fixed column 42, can also using bonding
To be in a manner of other are fixedly connected, as long as can guarantee to have by lower half portion of the fixed column 42 to resilient sleeve 41
The positioning of effect, fixed column can increase contact area of the resilient sleeve 41 when being sheathed on stem 1, guarantee resilient sleeve
41 reliabilities being connect with stem 1.In addition, circumferentially arranged with multiple grooves 421 on the outer wall of fixes sleeve, it can be further
Increase the contact area when being bonded to resilient sleeve 41, so that the connection between fixed column 42 and resilient sleeve 41 is more
Closely, and also effectively increase frictional force when stem 1 be threadedly coupled with fixed column 42 cooperation, guarantee that stem 1 contracts downwards
Into movement it is more stable and reliable.In the present embodiment, material used by fixed column 42 is copper, and it is very high to have intensity,
Using reliable.
It should be noted that in the present embodiment, material used by resilient sleeve 41 is rubber, have effective
Quality after elastic force and expansion is also very reliable, but in other embodiments, the material of resilient sleeve 41 is not by the present embodiment
Limitation, when can be according to actual needs, the selection verified.
In addition, the inner wall of connecting cylinder 2 is equipped with internal screw thread, the outer wall of the lower end of stem 1 is equipped with to be matched with internal screw thread
External screw thread, to guarantee the reliability of the threaded connection between stem 1 and connecting cylinder 2, and interior spiral shell set by 2 inside of connecting cylinder
Line can also facilitate the connection between connecting cylinder 2 and fixture.Support plate 3 is equipped with through-hole corresponding with stem 1, stem 1
It is arranged in through-hole, convenient for the connection between stem 1 and support plate 3, and support plate 3 can rotate on stem 1, convenient
When pouring of concrete is carried out on 3 top of support plate, the position of support plate 3 is adjusted.Referring to Fig. 1, described in the present embodiment
Pre-embedded bolt further include locating shim 6,6 fixing sleeve of locating shim is set on stem 1, and the positioning of support plate 3 is set to positioning spiral shell
Between mother 5 and locating shim 6, and the upper surface of support plate 3 is abutted against with institute location nut 5, the lower surface of support plate 3 and positioning
Gasket 6 abuts against, thereby, it is possible to realize the promotion to support plate 3 by location nut 5, convenient for reducing support plate 3 and connection
The distance between cylinder 2, so that controlling the distance between support plate 3 and connecting cylinder 2 more convenient；The lower surface of support plate 3 and
It is additionally provided with elastic washer 7 between locating shim 6, increases the reliability that resilient sleeve 41 expands, and elastic washer 7 can also delay
The phenomenon that rushing the extruding force and frictional force between locating shim 6 and location nut 5, support plate 3 avoided to wear in rotation,
Effectively improve the service life of the device.
In the present embodiment, stem 1 includes cylinder 11, nut 12 and connecting plate 13, the external screw thread being arranged on stem 1 point
For cloth in the lower half portion of cylinder 11, connecting plate 13 and nut 12 are all connected to the top of cylinder 11, connecting plate 13 and cylinder 11
Top is fixedly connected, and nut 12 is set on the upper surface of connecting plate 13, and nut 12 can facilitate staff using corresponding
Tool, which carries out force to cylinder 11, is retracted it into connecting cylinder 2, and connecting plate 13 is capable of increasing when carrying out concreting
Contact area guarantees the stability of whole device after casting concrete.
The pre-embedded bolt structure of the utility model is simple, easy to use, and during the installation process, connecting cylinder insertion is consolidated
It is fixed, displacement of the support plate on stem is controlled by positioning bolt so that the upper end of support plate and connecting cylinder on stem it
Between distance be gradually reduced so that expansion device gradually reduce after being compressed until generate expansion, compressed expansion
Device can generate bounce in the axial direction, so that connecting cylinder is reliably fixed, to realize reliable positioning function,
The displacement that support plate moves downward on stem is bigger, and the degrees of expansion of pre-embedded bolt is higher, thus, it is possible to make connecting cylinder with
Connection between fixture is relatively reliable and stablizes, then is fixed by way of casting concrete on it, can be effective
Avoid that there is a phenomenon where bolt fallings.
It should be understood that various information are described in the utility model using term " first ", " second " etc., but these
Information should not necessarily be limited by these terms, these terms are only used to for same type of information being distinguished from each other out.For example, not departing from this
In the case where utility model range, " first " information can also be referred to as " second " information, and similar, " second " information can also be with
Referred to as " first " information.
The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, without departing from the principle of this utility model, several improvement and deformations can also be made, these improve and become
Shape is also considered as the protection scope of the utility model.
Claims (10)
1. a kind of pre-embedded bolt, which is characterized in that including stem, connecting cylinder, support plate and expansion device, the stem passes through institute
It states support plate to be inserted in the connecting cylinder, and the stem is threadedly coupled with the connecting cylinder, the support plate is slideably
Be sheathed on the stem, the expansion device is sheathed on the stem, and the expansion device be located at the support plate and
Between the connecting cylinder, the both ends of the expansion device offset at the top of the bottom of the support plate and the connecting cylinder respectively
It connects, location nut is equipped on the stem, the location nut is set at the top of the support plate, the location nut
Support plate is pushed to move downward, so that the expansion device is radially expanded.
2. pre-embedded bolt according to claim 1, which is characterized in that the expansion device includes resilient sleeve, the bullet
Property sleeve fixing sleeve be set to the stem on, and the both ends of the resilient sleeve respectively with the bottom of the support plate and the company
It is abutted against at the top of connect cylinder.
3. pre-embedded bolt according to claim 2, which is characterized in that the expansion device further includes fixed column, described solid
Fixed column is sheathed on the stem, and is threadedly coupled with the stem, the top of the bottom of the fixed column and the connecting cylinder
It abuts against, the fixed column fixation is embedded in the resilient sleeve.
4. pre-embedded bolt according to claim 3, which is characterized in that the height of the fixed column is less than the resilient sleeve
Height.
5. pre-embedded bolt according to claim 3, which is characterized in that the inner wall of the expansion sleeve and the fixed column
Outer wall is mutually bonded.
6. pre-embedded bolt according to claim 5, which is characterized in that the fixed column is located at the bottom of resilient sleeve, and
Circumferentially arranged with multiple grooves on the outer wall of the fixed column.
7. pre-embedded bolt according to any one of claims 1 to 6, which is characterized in that the resilient sleeve is rubber bush.
8. pre-embedded bolt according to claim 1, which is characterized in that the outer wall of the lower end of the stem is equipped with outer spiral shell
Line, the connecting cylinder inner wall are equipped with the internal screw thread matched with the external screw thread, and the lower end of the stem is cooperatively connected in institute
It states in connecting cylinder.
9. pre-embedded bolt according to claim 1, which is characterized in that the support plate is equipped with corresponding with the stem
Through-hole, the stem is arranged in the through-hole.
10. pre-embedded bolt according to claim 9, which is characterized in that further include locating shim, the locating shim is arranged
In on the stem, the support plate is set between the location nut and the locating shim, and the support plate is upper
Surface is abutted against with institute's location nut, and the lower surface of the support plate is abutted against with the locating shim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821529378.0U CN208966800U (en) | 2018-09-18 | 2018-09-18 | A kind of pre-embedded bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821529378.0U CN208966800U (en) | 2018-09-18 | 2018-09-18 | A kind of pre-embedded bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208966800U true CN208966800U (en) | 2019-06-11 |
Family
ID=66756348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821529378.0U Active CN208966800U (en) | 2018-09-18 | 2018-09-18 | A kind of pre-embedded bolt |
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| Country | Link |
|---|---|
| CN (1) | CN208966800U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112854750A (en) * | 2021-03-15 | 2021-05-28 | 福建省闽发铝业股份有限公司 | Aluminum alloy template stair side seal section bar |
-
2018
- 2018-09-18 CN CN201821529378.0U patent/CN208966800U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112854750A (en) * | 2021-03-15 | 2021-05-28 | 福建省闽发铝业股份有限公司 | Aluminum alloy template stair side seal section bar |
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