CN204371903U - A kind of hydraulic bolt - Google Patents
A kind of hydraulic bolt Download PDFInfo
- Publication number
- CN204371903U CN204371903U CN201420873016.9U CN201420873016U CN204371903U CN 204371903 U CN204371903 U CN 204371903U CN 201420873016 U CN201420873016 U CN 201420873016U CN 204371903 U CN204371903 U CN 204371903U
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- CN
- China
- Prior art keywords
- bolt
- tapered sleeve
- middle tapered
- fitting
- outside
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Abstract
The utility model discloses a kind of hydraulic bolt, it is characterized in that: comprise fitting-up bolt, the two ends of described fitting-up bolt are protruded and are provided with screw thread, and thread head is provided with nut separately, and the outside cover of described fitting-up bolt has middle tapered sleeve.Described fitting-up bolt intermediate journal is taper, and described middle tapered sleeve to be sleeved on outside axle journal and to coordinate with axle journal tapering is on all four, and middle tapered sleeve cylindrical is cylindrical.Outside described middle tapered sleeve, cover has flange, and has gap outside described middle tapered sleeve and between flange endoporus.The beneficial effects of the utility model: structure is simple, as preferred technological scheme, fitting-up bolt axial tension causes radial expanding interference, the easy installation and removal of middle tapered sleeve when seated, steadiness is strong simultaneously, good reliability, long service life.All can use in main equipment and rugged environment.
Description
Technical field
The utility model relates to fastening bolt, particularly relates to a kind of hydraulic bolt.
Background technique
The connection of the axle system flange group of current machinery industry, still with articulation bolt group for principal mode.Due to external diameter and the hole interference fit of articulation bolt, so conventional mounting arrangements has heating, shrinkage method, bolt group is primarily of screw rod, nut composition.
The installation method of existing articulation bolt and flange hole is: be placed on by bolt in the freezing mixture such as liquid nitrogen or dry ice, allows its cooling meat, makes its external diameter be less than flange aperture, is filled in flange hole then rapidly.Absorb after heat resizing until bolt and reach interference fit with flange hole, be loaded on nut check.During dismounting, bolt can only be got by force from flange, and (often plucking flange hole) even cannot be removed.
There is following defect in prior art: the installation requirement of bolt is high, install, dismounting more difficult; Get from flange by force and can damage bolt and pull flange endoporus, can not reuse; Installation precision can be caused after bolt cooling meat recovers low again, and have the situation of biting with hole, the cooling of bolt simultaneously recovers to need the long period, and the installation time is long.
Model utility content
The purpose of this utility model is to overcome prior art deficiency, provides that a kind of easy installation and removal, fastening force are strong, the reliable hydraulic bolt of transmitting torque.
In order to reach the purpose of this utility model, technological scheme is as follows:
A kind of hydraulic bolt, is characterized in that: comprise fitting-up bolt, and the two ends of described fitting-up bolt are protruded and are provided with screw thread, and thread head is provided with nut separately, and the outside cover of described fitting-up bolt has middle tapered sleeve.
Further: described fitting-up bolt intermediate journal is taper, described middle tapered sleeve to be sleeved on outside axle journal and to coordinate with axle journal tapering is on all four, and middle tapered sleeve cylindrical is cylindrical.
Further: outside described middle tapered sleeve, cover has flange, and has gap outside described middle tapered sleeve and between flange endoporus.
As optimal technical scheme: described gap is 0.04-0.10mm.
During use, be connect in the mode of taper fit between the intermediate journal of fitting-up bolt and middle tapered sleeve.Be used for middle tapered sleeve (having the gap of 0.040-0.070mm depending on pore size between its external diameter and flange hole) to push gently when hydraulic fitting bolt group is installed, then bolt is put in middle tapered sleeve.After stretching end check plate determines the location of middle tapering, namely extender is installed, by bolt axial tension from this end.Now due to check plate location, cause the radial expanding of middle tapered sleeve external diameter.When tensile force rises to setting value, the external diameter of middle tapered sleeve and expanding are to certain interference value, and the now expansion interference of tapered sleeve completes.One end has the axial direction center hole for logical hydraulic oil, and the helical oil groove on bolt taper journal communicates, and center hole until the center of fitting-up bolt intermediate section, then is communicated between fitting-up bolt and middle tapered sleeve by the through hole of radial direction.
Thereafter round nut is screwed on respectively flange group two ends screw thread, screw on hydraulic elongator at stretching end, tight with spanner rod plate, connect extender You Lu And by setting oil pressure pretension round nut.
First treat during dismounting that oil pressure rises to certain value and applies pretightening force by hydraulic elongator and pull flange group two end nut, then input high pressure oil in the Taper Pipe screw of bolt one end, bolt is axially got loose from middle tapered sleeve screw.
The beneficial effect that the utility model has:
Structure is simple, as preferred technological scheme, fitting-up bolt axial tension causes radial expanding interference, the easy installation and removal of middle tapered sleeve when seated, and steadiness is strong simultaneously, good reliability, long service life.All can use in main equipment and rugged environment.
Accompanying drawing explanation
Fig. 1 is the structural representation of hydraulic bolt in the utility model;
Fig. 2 is the structural representation of fitting-up bolt end and nut in Fig. 1.
Embodiment
Below in conjunction with embodiment, the utility model is further described, but protection domain of the present utility model is not only confined to embodiment.
Shown in composition graphs 1, a kind of hydraulic bolt, comprises fitting-up bolt 1, and the two ends of fitting-up bolt 1 are protruded and are provided with screw thread, and thread head is provided with nut 4 separately, and the outside cover of fitting-up bolt 1 has middle tapered sleeve 3.
Fitting-up bolt 1 intermediate journal is taper, and middle tapered sleeve 3 to be sleeved on outside axle journal and to coordinate with axle journal tapering is on all four, and middle tapered sleeve 3 cylindrical is cylindrical.
Outside middle tapered sleeve 3, cover has flange, and has gap outside middle tapered sleeve 3 and between flange endoporus.Preferably, described gap is 0.04-0.10mm.
Continue shown in composition graphs 2, the circumferential surface of nut 3 is provided with blind hole 4, for inserting spanner rod tightening nut 3, with the nut 3 of pretightening force clamp flange end both sides during installation.
Preferably, nut 3 is grouped into by the cylindrical portion that interconnective two external diameters in side are different, larger cylindrical of diameter is positioned at inner side, be adjacent to flange, less is positioned at outside, the projection of whole fitting-up bolt 1 all entangles by nut 3, can prevent dust or other chips from being blocked at the position that nut 3 and fitting-up bolt 1 are threaded, and affects its dismounting.
Last it is noted that above embodiment only in order to illustrate the utility model and and technological scheme described by unrestricted the utility model, therefore, although this specification has been described in detail the utility model with reference to each above-mentioned embodiment, but, those of ordinary skill in the art is to be understood that, still can modify to the utility model or equivalent replacement, and all do not depart from technological scheme and the improvement thereof of spirit and scope of the present utility model, it all should be encompassed in right of the present utility model.
Claims (4)
1. a hydraulic bolt, it is characterized in that: comprise fitting-up bolt (1), the two ends of described fitting-up bolt (1) are protruded and are provided with screw thread, thread head is provided with nut (4) separately, and the outside cover of described fitting-up bolt (1) has middle tapered sleeve (3).
2. hydraulic bolt according to claim 1, it is characterized in that: described fitting-up bolt (1) intermediate journal is taper, described middle tapered sleeve (3) to be sleeved on outside axle journal and to coordinate with axle journal tapering is on all four, and middle tapered sleeve (3) cylindrical is cylindrical.
3. hydraulic bolt according to claim 2, is characterized in that: described middle tapered sleeve (3) outside cover has flange, and has gap between described middle tapered sleeve (3) outside and flange endoporus.
4. hydraulic bolt according to claim 3, is characterized in that: described gap is 0.04-0.10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420873016.9U CN204371903U (en) | 2014-12-30 | 2014-12-30 | A kind of hydraulic bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420873016.9U CN204371903U (en) | 2014-12-30 | 2014-12-30 | A kind of hydraulic bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204371903U true CN204371903U (en) | 2015-06-03 |
Family
ID=53328125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420873016.9U Active CN204371903U (en) | 2014-12-30 | 2014-12-30 | A kind of hydraulic bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204371903U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107470861A (en) * | 2017-07-25 | 2017-12-15 | 无锡鸿海龙船机有限公司 | One kind insulation hydraulic bolt and processing technology |
| CN114562504A (en) * | 2022-02-28 | 2022-05-31 | 江苏省艾维德紧固件有限公司 | Combined bolt fastener with damping effect |
| CN115405634A (en) * | 2022-08-16 | 2022-11-29 | 中信重工机械股份有限公司 | Connecting structure and method for main shaft and winding drum of mine hoist |
-
2014
- 2014-12-30 CN CN201420873016.9U patent/CN204371903U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107470861A (en) * | 2017-07-25 | 2017-12-15 | 无锡鸿海龙船机有限公司 | One kind insulation hydraulic bolt and processing technology |
| CN114562504A (en) * | 2022-02-28 | 2022-05-31 | 江苏省艾维德紧固件有限公司 | Combined bolt fastener with damping effect |
| CN115405634A (en) * | 2022-08-16 | 2022-11-29 | 中信重工机械股份有限公司 | Connecting structure and method for main shaft and winding drum of mine hoist |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |