CN108716496A - Two-stage hydraulic cylinder - Google Patents
Two-stage hydraulic cylinder Download PDFInfo
- Publication number
- CN108716496A CN108716496A CN201810786051.XA CN201810786051A CN108716496A CN 108716496 A CN108716496 A CN 108716496A CN 201810786051 A CN201810786051 A CN 201810786051A CN 108716496 A CN108716496 A CN 108716496A
- Authority
- CN
- China
- Prior art keywords
- stage
- slot
- card slot
- piston
- piston rod
- 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
- 239000012530 fluid Substances 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 5
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
Abstract
The invention discloses a kind of two-stage hydraulic cylinder, includes outer cylinder equipped with rod chamber hydraulic fluid port and rodless cavity hydraulic fluid port, guide sleeve, first stage piston bar, the piston being coupled on first stage piston bar inner end, blind hole is equipped in first stage piston bar；It is characterized in that is slided in blind hole is equipped with second piston rod, it is equipped with card slot in the outer end of first stage piston bar, second piston rod is equipped with front bayonet slot and rear card slot in an axial direction, and a card key is equipped with two grabs, one grab is placed in card slot, and another grab is placed in front bayonet slot or rear card slot；The present invention has the advantages that structure is relatively simple, easy to process, at low cost, and can accurately realize that the thrust of two-stage stroke is equal.
Description
Technical field
The present invention relates to a kind of two-stage hydraulic cylinder, especially a kind of etc. thrusts two-stage hydraulic cylinder.
Background technology
The row longer than single-stage oil cylinder can be achieved because its is compact-sized in two-stage hydraulic cylinder in given installation space
Journey, to widely be used in the case of installation space anxiety；The two-stage hydraulic cylinder generally used at present, two-stage
Piston/cylinder is stretched out and is recycled respectively, and two sets of hydraulic circuits need to be arranged to realize, the structure for not only resulting in inside is complex, difficult
With processing, it is of high cost, and be difficult to ensure in entire progradation ensure per level-one thrust it is equal because this need ensure two-stage
The compression section of piston/cylinder is essentially equal, and due to the presence of mismachining tolerance, this is difficult to realize.
Invention content
The purpose of the present invention is being directed to deficiencies of the prior art, a kind of two-stage hydraulic cylinder is provided, it has
Relatively simple, easy to process, the at low cost advantage of structure, and can accurately realize that the thrust of two-stage stroke is equal.
In order to achieve the above objectives, two-stage hydraulic cylinder of the invention includes equipped with rod chamber hydraulic fluid port and rodless cavity hydraulic fluid port
Outer cylinder, guide sleeve, first stage piston bar, the piston being coupled on first stage piston bar inner end, first stage piston bar is interior to be equipped with blind hole；It is special
What sign was to slide in blind hole is equipped with second piston rod, is equipped with card slot in the outer end of first stage piston bar, second piston rod is along axis
To equipped with front bayonet slot and rear card slot, a card key is equipped with two grabs, and a grab is placed in card slot, another grab be placed in front bayonet slot or after
In card slot.
The present invention original state be：The other end of card key is placed in front bayonet slot；In use, first stage piston bar is lived with two level
Stopper rod stretches out, workpiece is pushed to complete first stroke together；First stage piston bar is recycled together with second piston rod again, removes card
Key pulls out second piston rod, two grabs of card key is placed in card slot and rear card slot, then push first stage piston bar and second piston
Bar stretches out, workpiece is pushed to complete second stroke together；The present invention only needs the hydraulic circuit of setting control first stage piston bar, has
Relatively simple, easy to process, the at low cost advantage of structure, and the thrust of two-stage stroke only compression section with first stage piston bar
It is related, it can accurately realize that the thrust of two-stage stroke is equal,
As a further improvement on the present invention, the card key includes the two halves circle card key being oppositely arranged, two halves circle card key
One end is hinged, and the other end of two halves circle card key is fixedly connected with mounting base, a mounting base by axis pin and bolt-connection, bolt
The other end passes through another mounting base and is equipped with locking nut at the end；Card slot, front bayonet slot and rear card slot are annular slot；Both just
In the connection of two halves circle card key and two-piston bar, uniform force in the circumferential is ensured that, avoid deforming；
As a further improvement on the present invention, the gas vent of card slot and end face thereafter after being connected to is equipped in the second piston rod；
The smooth recycling of second piston rod can be achieved；
As a further improvement on the present invention, it is equipped with flexible support ring, lubricating oil successively in the back end outer circumference of second piston rod
Slot and copper support ring；It can guarantee the accuracy of second piston rod movement；
In conclusion the present invention has the advantages that structure is relatively simple, easy to process, at low cost, and it can accurately realize two-stage row
The thrust of journey is equal.
Description of the drawings
Fig. 1 is the front view of one working condition of the embodiment of the present invention.
Fig. 2 is the A-A sectional views of Fig. 1.
Fig. 3 is the front view of another working condition of the embodiment of the present invention.
Specific implementation mode
The invention will now be described in further detail with reference to the accompanying drawings.
As shown in Figure 1 and Figure 2, the two-stage hydraulic cylinder of the embodiment, including it is equipped with rod chamber hydraulic fluid port 2 and rodless cavity hydraulic fluid port 3
Outer cylinder 1, guide sleeve 4, first stage piston bar 5, the piston 6 being coupled to by screw thread on first stage piston bar inner end, first stage piston bar 5
Interior to be equipped with blind hole, that is slided in blind hole is equipped with second piston rod 7, and annular slot, two level are equipped in the outer end of first stage piston bar 5
Piston rod 7 is equipped with the rear card slot 8 of the front bayonet slot and annular of annular in an axial direction, and two halves circle card key 9 is oppositely arranged, two halves circular card
One end of key 9 is hinged by hinged shaft 10, and the other end of two halves circle card key 9, which welds, is fixedly connected with mounting base 11 or 12, an installation
Seat 11 is coupled by axis pin 13 with bolt 14, and the other end of bolt 14 passes through another mounting base 12 and is equipped with locking nut at the end
15, two halves circle card key 9 is equipped with two grabs, and a grab is placed in annular slot, and another grab original state is placed in annular
In front bayonet slot；The gas vent 16 of card slot 8 and end face thereafter after being connected to is equipped in second piston rod 7；In the rear end of second piston rod 7
Excircle is equipped with flexible support ring 17, oil-way 18 and copper support ring 19 successively；
The other end of two halves circle card key 9 is placed in front bayonet slot when original state；In use, 3 oil inlet of rodless cavity hydraulic fluid port, level-one is lived
Stopper rod 5 stretches out with second piston rod 7, workpiece is pushed to complete first stroke together；2 oil inlet of rod chamber hydraulic fluid port, then level-one is lived
Stopper rod 5 recycles together with second piston rod 7, unclamps locking nut 15, removes two halves circle card key 9, pulls out second piston rod 7,
As shown in figure 3, two grabs of two halves circle card key 9 are placed in annular slot and the rear card slot 8 of annular, then push first stage piston
Bar 5 and second piston rod 7 stretch out, workpiece are pushed to complete second stroke together；The present invention only needs setting control first stage piston bar 5
Hydraulic circuit, have the advantages that structure is relatively simple, easy to process, at low cost, and the thrust of two-stage stroke only and level-one
The compression section of piston rod 5 is related, can accurately realize that the thrust of two-stage stroke is equal；Pass through mounting base 11 and 12, axis pin 13, spiral shell
Bolt 14 and locking nut 15, compressible two halves circle card key 9 are both convenient for the connection of two halves circle card key 9 and two-piston bar 5,7,
It prevents from falling off, ensures that uniform force in the circumferential, avoid deforming；Gas vent 16 can realize smoothly returning for second piston rod 7
It receives；Flexible support ring 17 and copper support ring 19 provide radial support, avoid beating, it is ensured that second piston rod moves accurate
Degree.
Claims (4)
1. a kind of two-stage hydraulic cylinder includes outer cylinder, guide sleeve, first stage piston equipped with rod chamber hydraulic fluid port and rodless cavity hydraulic fluid port
Bar, the piston being coupled on first stage piston bar inner end, first stage piston bar is interior to be equipped with blind hole；It is characterized in that is slided in blind hole sets
Have second piston rod, the outer end of first stage piston bar be equipped with card slot, second piston rod in an axial direction be equipped with front bayonet slot and rear card slot, one
Card key is equipped with two grabs, and a grab is placed in card slot, and another grab is placed in front bayonet slot or rear card slot.
2. two-stage hydraulic cylinder as described in claim 1, it is characterised in that the card key includes the two halves circle being oppositely arranged
One end of card key, two halves circle card key is hinged, and the other end of two halves circle card key is fixedly connected with mounting base, and a mounting base passes through pin
The other end of axis and bolt-connection, bolt passes through another mounting base and is equipped with locking nut at the end；Card slot, front bayonet slot and rear card
Slot is annular slot.
3. two-stage hydraulic cylinder as claimed in claim 1 or 2, it is characterised in that block after being equipped with connection in the second piston rod
The gas vent of slot and end face thereafter.
4. two-stage hydraulic cylinder as claimed in claim 3, it is characterised in that set successively in the back end outer circumference of second piston rod
Flexible support ring, oil-way and copper support ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810786051.XA CN108716496A (en) | 2018-07-17 | 2018-07-17 | Two-stage hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810786051.XA CN108716496A (en) | 2018-07-17 | 2018-07-17 | Two-stage hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108716496A true CN108716496A (en) | 2018-10-30 |
Family
ID=63914192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810786051.XA Pending CN108716496A (en) | 2018-07-17 | 2018-07-17 | Two-stage hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108716496A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9005564D0 (en) * | 1990-03-13 | 1990-05-09 | Grove Coles Limited | Telescopic cylinders |
| DE19546661A1 (en) * | 1995-07-17 | 1997-06-19 | Montan Hydraulik Gmbh & Co Kg | Telescopic system |
| US6474215B1 (en) * | 1998-07-08 | 2002-11-05 | Aro | Actuator with approach pre-stroke and working stroke for operating a tool |
| US6527131B1 (en) * | 1999-07-30 | 2003-03-04 | Liebherr-Werk Ehingen Gmbh | Crane with a telescopic boom |
| JP2006290480A (en) * | 2005-04-06 | 2006-10-26 | Kato Works Co Ltd | Mobile crane |
| CN203189912U (en) * | 2013-03-13 | 2013-09-11 | 上海瑞孚管路系统有限公司 | Single-side fixing pipe fitting joint |
| CN204755464U (en) * | 2015-06-30 | 2015-11-11 | 徐州永佳液压设备有限公司 | Back end swivelling joint's pneumatic cylinder |
| CN204851844U (en) * | 2015-08-11 | 2015-12-09 | 卢继霞 | Reducing test hydro -cylinder |
| CN206065840U (en) * | 2016-10-12 | 2017-04-05 | 恒岳重工有限责任公司 | A kind of novel top covering device |
| CN208442106U (en) * | 2018-07-17 | 2019-01-29 | 泸州市龙马潭区长江液压件有限公司 | Two-stage hydraulic cylinder |
-
2018
- 2018-07-17 CN CN201810786051.XA patent/CN108716496A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9005564D0 (en) * | 1990-03-13 | 1990-05-09 | Grove Coles Limited | Telescopic cylinders |
| DE19546661A1 (en) * | 1995-07-17 | 1997-06-19 | Montan Hydraulik Gmbh & Co Kg | Telescopic system |
| US6474215B1 (en) * | 1998-07-08 | 2002-11-05 | Aro | Actuator with approach pre-stroke and working stroke for operating a tool |
| US6527131B1 (en) * | 1999-07-30 | 2003-03-04 | Liebherr-Werk Ehingen Gmbh | Crane with a telescopic boom |
| JP2006290480A (en) * | 2005-04-06 | 2006-10-26 | Kato Works Co Ltd | Mobile crane |
| CN203189912U (en) * | 2013-03-13 | 2013-09-11 | 上海瑞孚管路系统有限公司 | Single-side fixing pipe fitting joint |
| CN204755464U (en) * | 2015-06-30 | 2015-11-11 | 徐州永佳液压设备有限公司 | Back end swivelling joint's pneumatic cylinder |
| CN204851844U (en) * | 2015-08-11 | 2015-12-09 | 卢继霞 | Reducing test hydro -cylinder |
| CN206065840U (en) * | 2016-10-12 | 2017-04-05 | 恒岳重工有限责任公司 | A kind of novel top covering device |
| CN208442106U (en) * | 2018-07-17 | 2019-01-29 | 泸州市龙马潭区长江液压件有限公司 | Two-stage hydraulic cylinder |
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