CN104551639A - Spherical stretcher - Google Patents
Spherical stretcher Download PDFInfo
- Publication number
- CN104551639A CN104551639A CN201410845252.4A CN201410845252A CN104551639A CN 104551639 A CN104551639 A CN 104551639A CN 201410845252 A CN201410845252 A CN 201410845252A CN 104551639 A CN104551639 A CN 104551639A
- Authority
- CN
- China
- Prior art keywords
- stretching
- sphere
- expanding sleeve
- stretcher
- stretching piston
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
Abstract
The invention discloses a spherical stretcher. The spherical stretcher comprises a pedestal, a stretching sleeve, an oil cylinder, a stretching piston and a pre-tightening bolt; a stretching piston hole is opened in the stretching piston along the axial line thereof, the stretching sleeve is located in the stretching piston hole, a drive mechanism used fitly is arranged between the stretching sleeve and the inner wall of the stretching piston hole, and the drive mechanism is composed of a drive surface arranged at the inner wall of the stretching piston hole and an actuation surface arranged at the outer wall of the stretching sleeve; the drive surface and actuation surface are spherical surfaces used with each other, an angle A is existed between the axial line of a pre-tightening bolt and the axial line of the stretching sleeve, and clearances remain between the outer wall of the stretching sleeve and the inner wall of the stretching piston hole except the position provided with the drive mechanism. The stretching sleeve can regulate automatically through the spherical surface structures under the situation that the stretching sleeve and pre-tightening bolt are not vertical and coaxial, the problem that the stretcher stretches and deforms the pre-tightening bolt in the stretching process is avoided, and a pre-tightening nut of the pre-tightening bolt can always locate at a good pre-tightening state.
Description
Technical field
The present invention relates to a kind of stretcher, especially a kind of sphere stretcher.
Background technology
At present, adopt the stretcher of expanding sleeve, the step surface that its expanding sleeve contacts with stretching piston end surface, is generally plane or inclined-plane, and the fit clearance between expanding sleeve cylindrical and stretching piston inner hole is also less.
The stretcher that automatically resets disclosed in Chinese patent 201310591526.7, comprises tensile bolt, and tensile bolt is upper and lower arranges interchangeable nut, locking nut; Interchangeable nut periphery is fixedly installed on oil cylinder, and is fixedly installed back-moving spring and stretching piston between oil cylinder and interchangeable nut; Locking nut periphery arranges bracing ring, and the top of described bracing ring and the bottom of oil cylinder seal fixing by tensile bolt.Jointly full-automation is realized by back-moving spring and stretching piston, time saving and energy saving, reduce costs, increase work efficiency.
Hydraulic bolt tensioning jack and for example disclosed in Chinese patent 201310095685.8, it comprises stretching nut, outer plunger, piston, inner plunger, base, described inner plunger is connected with base and is arranged in outer plunger, stretching nut connects with outer plunger, the inner surface top of described outer plunger is an inverted cone surface, establish an inverted cone surface below the described stretching nut outer surfaces shaft shoulder, match with inverted cone surface on outer plunger inner surface, described piston is arranged on the sidewall of inner plunger.This device can carry out step-less adjustment to the oil pressure of pump in hydraulic system, and oil pressure acts in the oil pocket face of stretcher and produces pretightning force, and with its linear proportional relation, convenient to the pretensioning operation of bolt, and adjustable range is large; After bolt pretightening reaches predetermined value, manually can screw this frock of nut dismounting
For another example the bolt tensioning jack disclosed in Chinese patent 201220582972.2, comprise cylinder body and be arranged on the piston in cylinder body, the first sealing ring and the second sealing ring is provided with between cylinder body and piston, the lower end of cylinder body is connected with the supporting bridge being provided with ring, in piston, stretching head is installed, stretching head comprises the first shaft part, the second shaft part and changeover portion, and the first shaft part is provided with flange sections, and the lower end of changeover portion and the contact position of the second shaft part are the conical surface; Described piston comprises the first hole section and the second hole section, and the first hole section is provided with the annular groove adapted with the structure of the changeover portion of stretching head; There is the degree destroyed in the bottom surface that significantly can reduce the first shaft part, and improves the service life of bolt tensioning jack
Known in sum, existing hydraulic bolt tensioning jack, although have respective advantage, but all there is following shortcoming: when carrying out pretensioning operation to bolt, when expanding sleeve and pretension bolt out of plumb or disalignment, expanding sleeve can not redraw in piston inner hole and automatically regulate, and is easy to a pretension bolt stretch bending distortion and makes pre-load nut not easily pretension.Affect whole part pretension.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of sphere stretcher is provided.This sphere stretcher is under expanding sleeve and pretension bolt generation out of plumb, out-of-alignment situation, can guarantee that expanding sleeve relies on spherical structure automatically to adjust, prevent stretcher in drawing process by pretension bolt stretcher strain, guarantee that the pre-load nut of pretension bolt can be in good Pre strained state all the time; In addition, structure of the present invention is simple, practical function.
For realizing above technical purpose, the present invention will take following technical scheme:
A kind of sphere stretcher, comprises base, expanding sleeve, oil cylinder, stretching piston and pretension bolt; Described oil cylinder, stretching piston and expanding sleeve are all by base support, and the clutch end of oil cylinder is connected with stretching piston; Stretching piston offers stretching piston hole along own axes, expanding sleeve is arranged in stretching piston hole, and exist between expanding sleeve and stretching piston hole inwall with the use of driving mechanism, described driving mechanism by stretch piston hole inwall arrange drive surface and expanding sleeve outer wall arrange start face form; Pretension bolt is connected and fixed with expanding sleeve and whorl of base respectively; Described drive surface, start face are the sphere be used in conjunction with each other, and pretension bolt axis and expanding sleeve axis exist included angle A, in addition, between expanding sleeve outer wall and stretching piston hole inwall, in all the other positions arranging driving mechanism position, there is gap.
As a further improvement on the present invention, described drive surface is the sphere of indent, and start face is then the sphere of evagination.
As a further improvement on the present invention, described base comprises bracing ring and locking nut, and locking nut is positioned at bracing ring inner ring, and is fixedly connected with bracing ring.
As a further improvement on the present invention, the size of described included angle A is 3-8 °.
As a further improvement on the present invention, the size of described included angle A is 5 °.
According to above technical scheme, relative to prior art, the present invention has following advantage:
Sphere stretcher of the present invention, between expanding sleeve with stretching piston hole inwall, adopt the sphere mated as driving mechanism, therefore, even if under expanding sleeve and pretension bolt generation out of plumb, out-of-alignment situation, can guarantee that expanding sleeve relies on spherical structure automatically to adjust, prevent stretcher in drawing process by pretension bolt stretcher strain, guarantee that the pre-load nut of pretension bolt can be in good Pre strained state all the time.
In addition, between expanding sleeve outer wall of the present invention and stretching piston hole inwall, in all the other positions arranging driving mechanism position, there is gap, so that the position adjustments of expanding sleeve and pretension bolt.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of sphere stretcher of the present invention (pretension bolt axis and expanding sleeve axis exist included angle A);
Fig. 2 is the structural representation of the another kind of position of sphere stretcher of the present invention (pretension bolt axis and expanding sleeve axis exist included angle A);
Wherein:
Expanding sleeve 1;
Oil cylinder 2;
Stretching piston 3;
Support ring 4;
Pretension stud 5;
Locking nut 6.
Detailed description of the invention
Technical scheme of the present invention is explained below with reference to accompanying drawing.
These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
As shown in Figure 1, 2, sphere stretcher of the present invention, comprises expanding sleeve 1, oil cylinder 2, stretching piston 3, support ring 4, pretension stud 5, locking nut 6; Wherein: locking nut is placed in bracing ring, screw is adopted both to be linked into an integrated entity, to form base; Expanding sleeve, oil cylinder, stretching piston are all placed in above base, and the clutch end of oil cylinder is connected with stretching piston, and stretching piston offers stretching piston hole along own axes, and stretching piston hole has a drive surface; Expanding sleeve is placed in stretching piston hole, and expanding sleeve has the start face matched with stretching piston hole drive surface, the drives structure that described drive surface, start face are formed, and can realize the driving of stretching piston to expanding sleeve; Described drive surface, start face are sphere, and pretension bolt axis and expanding sleeve axis exist included angle A, in addition, between expanding sleeve outer wall and stretching piston hole inwall, in all the other positions arranging driving mechanism position, there is gap; Pretension stud is threaded with the Inner edge of expanding sleeve, the inner ring of locking nut respectively.As the convenience of structural design, described drive surface is the sphere of indent, and start face is then the sphere of evagination; Due to the stability requirement of structure, the size of included angle A limits to some extent, and based on repeatedly design and the correction of present inventor, the size of described included angle A is 3-8 °, is preferably 5 °.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on description, must determine its technical scope according to right.
Claims (5)
1. a sphere stretcher, comprises base, expanding sleeve, oil cylinder, stretching piston and pretension bolt; Described oil cylinder, stretching piston and expanding sleeve are all by base support, and the clutch end of oil cylinder is connected with stretching piston; Stretching piston offers stretching piston hole along own axes, expanding sleeve is arranged in stretching piston hole, and exist between expanding sleeve and stretching piston hole inwall with the use of driving mechanism, described driving mechanism by stretch piston hole inwall arrange drive surface and expanding sleeve outer wall arrange start face form; Pretension bolt is connected and fixed with expanding sleeve and whorl of base respectively; It is characterized in that, described drive surface, start face are the sphere be used in conjunction with each other, and pretension bolt axis and expanding sleeve axis exist included angle A, in addition, between expanding sleeve outer wall and stretching piston hole inwall, in all the other positions arranging driving mechanism position, there is gap.
2. sphere stretcher according to claim 1, it is characterized in that, described drive surface is the sphere of indent, and start face is then the sphere of evagination.
3. sphere stretcher according to claim 1, it is characterized in that, described base comprises bracing ring and locking nut, and locking nut is positioned at bracing ring inner ring, and is fixedly connected with bracing ring.
4. sphere stretcher according to claim 1, it is characterized in that, the size of described included angle A is 3-8 °.
5. sphere stretcher according to claim 4, it is characterized in that, the size of described included angle A is 5 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410845252.4A CN104551639B (en) | 2014-12-31 | 2014-12-31 | Sphere stretcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410845252.4A CN104551639B (en) | 2014-12-31 | 2014-12-31 | Sphere stretcher |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104551639A true CN104551639A (en) | 2015-04-29 |
| CN104551639B CN104551639B (en) | 2016-11-23 |
Family
ID=53069270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410845252.4A Active CN104551639B (en) | 2014-12-31 | 2014-12-31 | Sphere stretcher |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104551639B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105328445A (en) * | 2015-11-10 | 2016-02-17 | 北京科路工业装备股份有限公司 | Bolt stretching device |
| CN109048314A (en) * | 2018-10-15 | 2018-12-21 | 扬州市神力吊具制造有限公司 | A kind of self-adaptive hydraulic stretcher |
| CN109945036A (en) * | 2019-04-22 | 2019-06-28 | 沪东重机有限公司 | Stepless plane adjusting device, power equipment for ship and installation method |
| CN112960302A (en) * | 2021-01-29 | 2021-06-15 | 福建龙马环卫装备股份有限公司 | Pin shaft installation method of shear-reducing push plate oil cylinder seat |
| CN113176139A (en) * | 2021-06-11 | 2021-07-27 | 深圳万测试验设备有限公司 | Self-adaptive coaxial adjusting mechanism |
-
2014
- 2014-12-31 CN CN201410845252.4A patent/CN104551639B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105328445A (en) * | 2015-11-10 | 2016-02-17 | 北京科路工业装备股份有限公司 | Bolt stretching device |
| CN105328445B (en) * | 2015-11-10 | 2018-05-11 | 北京科路工业装备股份有限公司 | A kind of bolt tensioning jack |
| CN109048314A (en) * | 2018-10-15 | 2018-12-21 | 扬州市神力吊具制造有限公司 | A kind of self-adaptive hydraulic stretcher |
| CN109048314B (en) * | 2018-10-15 | 2024-02-27 | 扬州市神力吊具制造有限公司 | Self-adaptive hydraulic stretcher |
| CN109945036A (en) * | 2019-04-22 | 2019-06-28 | 沪东重机有限公司 | Stepless plane adjusting device, power equipment for ship and installation method |
| CN112960302A (en) * | 2021-01-29 | 2021-06-15 | 福建龙马环卫装备股份有限公司 | Pin shaft installation method of shear-reducing push plate oil cylinder seat |
| CN112960302B (en) * | 2021-01-29 | 2022-08-09 | 福龙马集团股份有限公司 | Pin shaft installation method of shear-reducing push plate oil cylinder seat |
| CN113176139A (en) * | 2021-06-11 | 2021-07-27 | 深圳万测试验设备有限公司 | Self-adaptive coaxial adjusting mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104551639B (en) | 2016-11-23 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20170525 Address after: Tongzhou District Pingchao town in Jiangsu province 226361 Nantong Tongyang Road No. 2 Patentee after: Jiangsu wisdom Machinery Co., Ltd. Address before: Tongzhou District Pingchao town in Jiangsu province 226361 Nantong Tongyang Road No. 2 Patentee before: Nantong Gaosheng Machinery Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 226361 No.2, Tongyang South Road, Pingchao Town, Tongzhou District, Nantong City, Jiangsu Province Patentee after: Jiangsu Gaosheng Machinery Co.,Ltd. Address before: 226361 No.2, Tongyang South Road, Pingchao Town, Tongzhou District, Nantong City, Jiangsu Province Patentee before: JIANGSU ZHITUO MACHINERY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |