CN103170833A - Novel double-level tensioner - Google Patents
Novel double-level tensioner Download PDFInfo
- Publication number
- CN103170833A CN103170833A CN2013100683530A CN201310068353A CN103170833A CN 103170833 A CN103170833 A CN 103170833A CN 2013100683530 A CN2013100683530 A CN 2013100683530A CN 201310068353 A CN201310068353 A CN 201310068353A CN 103170833 A CN103170833 A CN 103170833A
- Authority
- CN
- China
- Prior art keywords
- piston
- oil cylinder
- base
- spring
- cylinder
- 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.)
- Pending
Links
Landscapes
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
The invention discloses a novel double-level tensioner which comprises a base, a shifting sleeve, a spring, a lower oil cylinder, a lower piston, an upper oil cylinder, an upper piston, a spring, a locking nut, a cover plate and a transmission mechanism. The spring is arranged on the upper portion of an inner hole of the base. The shifting sleeve is installed on the lower portion of the inner hole of the base. A hole is machined in one side of the base. The shifting sleeve is connected with the transmission mechanism. The lower oil cylinder is tightly fixed on the base. The lower piston is arranged in the base. The upper oil cylinder is connected on the lower oil cylinder in a threaded mode. The upper piston is arranged in the upper oil cylinder and contacted with the lower piston. The cover plate is connected on the upper oil cylinder. The cover plate, the upper oil cylinder and the upper piston form an empty cavity for the springs to be placed. The novel double-level tensioner is large in pressure (150 Mpa), small in size and suitable for high-intensity bolt working in a narrow space. Under identical tensioning force, a radial size of the novel double-level tensioner is smaller than that of a single-level tensioner by 20% or so.
Description
Technical field
The present invention relates to a kind of twin-stage stretcher, be suitable for the equipment bolt occasion long, that pitch of bolts is smaller of appearing.
Background technology
At present, usually use single-stage stretcher pretension or dismantle long bolt, when still and tensile force that need less when pitch of bolts is larger: if single-stage stretcher diameter is larger, can't carry out pretension or dismounting to bolt; And if the diameter of single-stage stretcher is diminished, its tensile force also will diminish, and will affect pretension or demounting bolt.And the twin-stage stretcher also is not applied to long bolt scope at present.
Summary of the invention
Problem to be solved by this invention is to provide a kind of twin-stage stretcher, it can pretension or dismounting than stay bolt; Simultaneously, its diameter is less, goes for the less situation of pitch of bolts.In addition, it can also guarantee that lower piston makes progress can not produce with upper cylinder in running and collide with, and improves simultaneously the compression strength of lower piston, prevents the distortion of lower piston.
A kind of novel twin-stage stretcher of the present invention, it comprises base, pulling sleeve, spring, lower oil cylinder, lower piston, upper cylinder, upper piston, spring, locking nut, cover plate, transmission mechanism; Spring is placed on the top of base endoporus, pulling sleeve is equipped with in the bottom, and a side processing of base is porose, and pulling sleeve is connected with transmission mechanism; Lower oil cylinder be fastened on base above, be provided with lower piston in it, upper cylinder is threaded connection on lower oil cylinder, be provided with upper piston in it, upper piston contacts with lower piston, is connected with cover plate on upper cylinder, places spring in the cavity that cover plate, upper cylinder, upper piston three form.
When using twin-stage stretcher of the present invention dismounting or pretension bolt, pulling sleeve is enclosed within on hold-down nut, bolt is passed from the endoporus of lower piston and upper piston, the locking nut of then screwing on bolt top makes it contact with upper piston.When starting working like this, the hydraulic oil that high-pressure pump is exported by sebific duct enters in the oil cylinder of up and down, and at this moment, upper lower piston moves upward simultaneously, pulls bolt by locking nut, makes bolt produce strain, and the gap has appearred in hold-down nut; At this moment, stir transmission mechanism with dead man, hold-down nut has just pinned bolt, and bolt is just by pretension.Then, with the high-pressure pump release, piston returns to original position under the active force of spring, with dead man, locking nut is rotated to the state that is adjacent to upper piston, just can operate for the second time, until complete.
The pressure of stretcher of the present invention large (150Mpa), volume are little: in equal tensile force situation, than little 20% left and right of single-stage stretcher radial dimension, more be applicable to the high-strength bolt work of small space.So the present invention is applicable to the equipment bolt situation long, that pitch of bolts is smaller of appearing.
Description of drawings
Fig. 1 is the structural representation of stretcher of the present invention.
The specific embodiment
As can be seen from Figure 1, a kind of novel twin-stage stretcher of the present invention, it comprises base 1, pulling sleeve 2, spring 3, lower oil cylinder 4, lower piston 5, upper cylinder 6, upper piston 7, spring 8, cover plate 9, transmission mechanism; Spring 3 is placed on the top of base 1 endoporus, pulling sleeve 2 is equipped with in the bottom, and a side processing of base 1 is porose, and pulling sleeve 2 is connected with transmission mechanism; Lower oil cylinder 4 be fastened on base 1 above, be provided with lower piston 5 in it, upper cylinder 6 is threaded connection on lower oil cylinder 4, be provided with upper piston 7 in it, upper piston 7 contacts with lower piston 5, be connected with cover plate 9 on upper cylinder 6, place spring 8 in the cavity that cover plate 9, upper cylinder 6, upper piston 7 threes form.
Wherein, transmission mechanism comprises the pinion 10 that is meshed and 11, two geared sleeves of gear wheel in up and down fixed cover 12,13, and on base 1, pulling sleeve 2 external tooths are meshed with pinion 10 up and down fixed cover 12,13 by screw fastening.Like this, stir gear wheel 11 with driving lever, because gear wheel 11 is meshed with pinion 10, pinion 10 is meshed with pulling sleeve 2, so can be by pulling sleeve 2 nut 15 that is locked.
When using twin-stage stretcher dismounting of the present invention or pretension bolt, pulling sleeve 2 is enclosed within on hold-down nut 15, bolt 16 is passed from the endoporus of lower piston 5 and upper piston 7, then the locking nut 14 of screwing on bolt 16 tops, it is contacted with upper piston 7, then start working: the hydraulic oil that high-pressure pump is exported by sebific duct enters in the oil cylinder 6,4 of up and down, at this moment, upper lower piston 7,5 moves upward simultaneously, pull bolt 16 by locking nut 14, make bolt 16 produce strain, the gap has appearred in hold-down nut 15; At this moment, stir transmission mechanism with dead man, hold-down nut 15 has just pinned bolt 16, and bolt 16 is just by pretension.Then, with the high-pressure pump release, piston returns to original position under the active force of spring, with dead man, locking nut 14 is rotated to the state that is adjacent to upper piston 7, just can operate for the second time, until complete.
In the present invention, the endoporus of lower piston 5 and upper piston 7 is unthreaded hole, and bolt 16 can pass from both holes easily.Like this, for the bolt less than both holes, as long as change associated locking nut 14, can carry out pretension or dismounting to it.
As a modification of the present invention mode, between the vertical plane that contacts with upper piston 7 on upper cylinder 6 and upper cylinder 6 and horizontal plane that lower oil cylinder 4 contacts by conical surface A transition.Like this when the twin-stage stretcher is worked, lower piston 5 can move upward and when promoting upper piston 7, even there is mismachining tolerance in lower piston 5 or slight distortion is arranged, because upper cylinder 6 exists conical surface A, guaranteed running space, lower piston 5 can not contact with upper cylinder 6 in the scope of safety travel, namely can upwards not promote upper cylinder 6, can not make up and down oil cylinder 6,4 threaded engagement faces impaired, up and down oil cylinder 6,4 can not break away from.
As a modification of the present invention mode, between the horizontal plane that contacts with upper piston 7 on lower piston 5 and vertical plane that lower piston 5 up and down oil cylinders 4 contact by conical surface B transition.Conical surface B on lower piston 5 has further strengthened running space, has guaranteed that lower piston 5 can not contact with upper cylinder 6; Simultaneously, because the conical surface B on lower piston 5 is larger than the plane 5 of existing lower piston 5, thereby improve the compression strength of lower piston 5, prevented the distortion of lower piston 5.Therefore, this novel twin-stage stretcher has extended service life, has reduced production cost.
Characteristics of the present invention are: large (150Mpa) volume of pressure is little, and in equal tensile force situation, the twin-stage stretcher more is applicable to the high-strength bolt work of small space than little 20% left and right of single-stage stretcher radial dimension; Oil cylinder and piston adopt cone structure, have both improved compression strength and have prevented distortion, have guaranteed again running space; Because the restriction in space can not be adopted the yellow structure of dish, and adopt spring automatic reset, reduced labour intensity; Adopt locking nut structure to save pull bar, simple in structure; Integral structure, simple to operation.
Claims (5)
1. novel twin-stage stretcher, it is characterized in that: it comprises base (1), pulling sleeve (2), spring (3), lower oil cylinder (4), lower piston (5), upper cylinder (6), upper piston (7), spring (8), cover plate (9), transmission mechanism; Spring (3) is placed on the top of base (1) endoporus, pulling sleeve (2) is equipped with in the bottom, and a side processing of base (1) is porose, and pulling sleeve (2) is connected with transmission mechanism; Lower oil cylinder (4) be fastened on base (1) above, be provided with lower piston (5) in it, upper cylinder (6) is threaded connection on lower oil cylinder (4), be provided with upper piston (7) in it, upper piston (7) contacts with lower piston (5), be connected with cover plate (9) on upper cylinder (6), place spring (8) in the cavity that cover plate (9), upper cylinder (6), upper piston (7) three form.
2. twin-stage stretcher according to claim 1, it is characterized in that: transmission mechanism comprises pinion (10) and the gear wheel (11) that is meshed, two geared sleeves are in up and down fixed cover (12,13), on base (1), pulling sleeve (2) external tooth is meshed with pinion (10) up and down fixed cover (12,13) by screw fastening.
3. twin-stage stretcher according to claim 1, it is characterized in that: the endoporus of lower piston (5) and upper piston (7) is unthreaded hole.
4. twin-stage stretcher according to claim 1 is characterized in that: pass through conical surface A transition between the upper vertical plane that contacts with upper piston (7) of upper cylinder (6) and upper cylinder (6) and horizontal plane that lower oil cylinder (4) contacts.
5. twin-stage stretcher according to claim 1 is characterized in that: pass through conical surface B transition between the upper horizontal plane that contacts with upper piston (7) of lower piston (5) and vertical plane that lower piston (5) up and down oil cylinders (4) contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100683530A CN103170833A (en) | 2013-03-05 | 2013-03-05 | Novel double-level tensioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100683530A CN103170833A (en) | 2013-03-05 | 2013-03-05 | Novel double-level tensioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103170833A true CN103170833A (en) | 2013-06-26 |
Family
ID=48631256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100683530A Pending CN103170833A (en) | 2013-03-05 | 2013-03-05 | Novel double-level tensioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103170833A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106624760A (en) * | 2016-12-31 | 2017-05-10 | 马鞍山市三江机械有限公司 | Overtravel alarming and resetting stretcher and stretching method thereof |
| CN106736481A (en) * | 2016-12-31 | 2017-05-31 | 马鞍山市三江机械有限公司 | A kind of stretcher and its stretching and installation method |
| CN106736480A (en) * | 2016-12-31 | 2017-05-31 | 马鞍山市三江机械有限公司 | A kind of hydraulic elongator and its drawing process |
| CN107717429A (en) * | 2017-11-09 | 2018-02-23 | 大连泰凯工业有限公司 | Multistage super-pressure thin-walled hydraulic elongator for hub of wind power generator kingbolt |
| CN108000125A (en) * | 2017-12-12 | 2018-05-08 | 马鞍山市益华液压机具有限公司 | A kind of gear driven mechanism for hydraulic elongator |
| CN108362457A (en) * | 2018-04-20 | 2018-08-03 | 广东水利电力职业技术学院（广东省水利电力技工学校） | A kind of shake table mounting base |
| CN108705486A (en) * | 2018-07-15 | 2018-10-26 | 德州德劲液压动力有限公司 | A kind of intelligence stretcher |
| CN108994589A (en) * | 2018-08-03 | 2018-12-14 | 南通高盛机械制造有限公司 | A kind of Automatic-drawing head |
| CN111922690A (en) * | 2020-08-14 | 2020-11-13 | 马鞍山市罗泰特机械制造有限公司 | Spring is from restoring to throne doublestage hydraulic stretcher with meter function |
| CN111922691A (en) * | 2020-08-14 | 2020-11-13 | 马鞍山市罗泰特机械制造有限公司 | Hydraulic bolt stretcher capable of counting |
| CN113649977A (en) * | 2021-10-19 | 2021-11-16 | 江苏华恩机械科技有限公司 | Split type general type high accuracy hydraulic stretcher |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004108360A1 (en) * | 2003-06-06 | 2004-12-16 | Siemens Power Generation, Inc. | Bolted assembly and apparatus and method for tensioning the bolted assembly |
| CN200957544Y (en) * | 2006-10-11 | 2007-10-10 | 钱宗荣 | Bolt hydraulic stretcher |
| CN201267985Y (en) * | 2008-09-24 | 2009-07-08 | 沪东重机有限公司 | Hydraulic drawing device with automatic resetting function |
| CN201446389U (en) * | 2009-06-01 | 2010-05-05 | 常州爱普超高压液压系统有限公司 | stretcher |
| CN201677168U (en) * | 2010-05-11 | 2010-12-22 | 海泰斯（北京）工程设备有限公司 | Compact large-power hydraulic bolt tensioner |
| CN202640300U (en) * | 2012-06-05 | 2013-01-02 | 马鞍山市三江机械有限公司 | Novel dual-stage bolt stretcher |
| CN202647025U (en) * | 2012-06-05 | 2013-01-02 | 马鞍山市三江机械有限公司 | Connecting mechanism of double-stage screw bolt stretching device and pump station |
| CN203141074U (en) * | 2013-03-05 | 2013-08-21 | 马鞍山市三江机械有限公司 | Novel double-stage tensioner |
-
2013
- 2013-03-05 CN CN2013100683530A patent/CN103170833A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004108360A1 (en) * | 2003-06-06 | 2004-12-16 | Siemens Power Generation, Inc. | Bolted assembly and apparatus and method for tensioning the bolted assembly |
| CN200957544Y (en) * | 2006-10-11 | 2007-10-10 | 钱宗荣 | Bolt hydraulic stretcher |
| CN201267985Y (en) * | 2008-09-24 | 2009-07-08 | 沪东重机有限公司 | Hydraulic drawing device with automatic resetting function |
| CN201446389U (en) * | 2009-06-01 | 2010-05-05 | 常州爱普超高压液压系统有限公司 | stretcher |
| CN201677168U (en) * | 2010-05-11 | 2010-12-22 | 海泰斯（北京）工程设备有限公司 | Compact large-power hydraulic bolt tensioner |
| CN202640300U (en) * | 2012-06-05 | 2013-01-02 | 马鞍山市三江机械有限公司 | Novel dual-stage bolt stretcher |
| CN202647025U (en) * | 2012-06-05 | 2013-01-02 | 马鞍山市三江机械有限公司 | Connecting mechanism of double-stage screw bolt stretching device and pump station |
| CN203141074U (en) * | 2013-03-05 | 2013-08-21 | 马鞍山市三江机械有限公司 | Novel double-stage tensioner |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106624760A (en) * | 2016-12-31 | 2017-05-10 | 马鞍山市三江机械有限公司 | Overtravel alarming and resetting stretcher and stretching method thereof |
| CN106736481A (en) * | 2016-12-31 | 2017-05-31 | 马鞍山市三江机械有限公司 | A kind of stretcher and its stretching and installation method |
| CN106736480A (en) * | 2016-12-31 | 2017-05-31 | 马鞍山市三江机械有限公司 | A kind of hydraulic elongator and its drawing process |
| CN107717429A (en) * | 2017-11-09 | 2018-02-23 | 大连泰凯工业有限公司 | Multistage super-pressure thin-walled hydraulic elongator for hub of wind power generator kingbolt |
| CN108000125A (en) * | 2017-12-12 | 2018-05-08 | 马鞍山市益华液压机具有限公司 | A kind of gear driven mechanism for hydraulic elongator |
| CN108362457A (en) * | 2018-04-20 | 2018-08-03 | 广东水利电力职业技术学院（广东省水利电力技工学校） | A kind of shake table mounting base |
| CN108705486A (en) * | 2018-07-15 | 2018-10-26 | 德州德劲液压动力有限公司 | A kind of intelligence stretcher |
| CN108705486B (en) * | 2018-07-15 | 2023-12-29 | 德州德劲液压动力有限公司 | Intelligent stretcher |
| CN108994589A (en) * | 2018-08-03 | 2018-12-14 | 南通高盛机械制造有限公司 | A kind of Automatic-drawing head |
| CN111922690A (en) * | 2020-08-14 | 2020-11-13 | 马鞍山市罗泰特机械制造有限公司 | Spring is from restoring to throne doublestage hydraulic stretcher with meter function |
| CN111922691A (en) * | 2020-08-14 | 2020-11-13 | 马鞍山市罗泰特机械制造有限公司 | Hydraulic bolt stretcher capable of counting |
| CN113649977A (en) * | 2021-10-19 | 2021-11-16 | 江苏华恩机械科技有限公司 | Split type general type high accuracy hydraulic stretcher |
| CN113649977B (en) * | 2021-10-19 | 2021-12-14 | 江苏华恩机械科技有限公司 | Split type general type high accuracy hydraulic stretcher |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103170833A (en) | Novel double-level tensioner | |
| CN202668031U (en) | Disassembly and assembly structure of reduction box output shaft and flange plate | |
| CN103203717A (en) | High-pressure safety valve disassembling tool | |
| CN202639811U (en) | Stroke control part for two-stage bolt stretcher | |
| CN203141074U (en) | Novel double-stage tensioner | |
| CN204416985U (en) | A kind of little tonnage free releasing hydraulic wireline winch with power-transfer clutch | |
| CN204308542U (en) | A kind of novel single-stage stretcher | |
| CN203665048U (en) | Press machine with special pressure | |
| CN204603813U (en) | A kind of sliding clamp of locking | |
| CN202507227U (en) | Hydraulic extractor for steering main pin of vehicle | |
| CN104552149A (en) | Single-stage thin-type bolt tensioner | |
| CN203125088U (en) | Disassembling and assembling tool for brake wheel pump | |
| CN202132417U (en) | Brake system of large-size hydraulic towing winch | |
| CN103056836A (en) | Special tool for disassembling and assembling piston of emergency pressure distributing valve | |
| CN203426669U (en) | Device for disassembly and assembly of hydraulic cylinder | |
| CN102745569B (en) | Normally closed type hydraulic falling protector | |
| CN202597329U (en) | Self-locking and self-unlocking loop hydraulic oil cylinder | |
| CN207618936U (en) | A kind of steel wire tensioning anti-loosening device | |
| CN101376091A (en) | Integral hinge beam forging structure of hexahedron top press | |
| CN202640300U (en) | Novel dual-stage bolt stretcher | |
| CN202192473U (en) | Novel brake structure of spindle box of lathe | |
| CN204621937U (en) | The special dismantling device of a kind of hydraulic clutch | |
| CN201275479Y (en) | Integral hinge beam forging structure of hexahedron top press | |
| CN217732539U (en) | Jack loosening and clamping component of lifting jack | |
| CN103753466A (en) | Hollow hydraumatic spanner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130626 |