CN102852896A - Double-action multistage hydraulic oil cylinder with solid piston rod - Google Patents

Double-action multistage hydraulic oil cylinder with solid piston rod Download PDF

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Publication number
CN102852896A
CN102852896A CN2012102613241A CN201210261324A CN102852896A CN 102852896 A CN102852896 A CN 102852896A CN 2012102613241 A CN2012102613241 A CN 2012102613241A CN 201210261324 A CN201210261324 A CN 201210261324A CN 102852896 A CN102852896 A CN 102852896A
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Prior art keywords
cylinder
piston rod
piston
oil
hole
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CN2012102613241A
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CN102852896B (en
Inventor
沈姝君
魏爱平
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沈姝君
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Priority to CN201210261324.1A priority Critical patent/CN102852896B/en
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Application granted granted Critical
Publication of CN102852896B publication Critical patent/CN102852896B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The invention relate to a double-action multistage hydraulic oil cylinder with a solid piston rod. The hydraulic oil cylinder comprises a first-stage cylinder sleeve, pistons, the piston rod and a plurality of stages of inner cylinder sleeves including a tail-stage cylinder sleeve. The piston rod is arranged in the tail-stage cylinder sleeve and is a solid rod. An oil feeding hole is arranged at the bottom end of the first-stage cylinder sleeve, and an oil discharging hole is arranged at the other end. A piston is fixed outside one end of each stage of inner cylinder sleeve close to the oil feeding hole, each stage of inner cylinder sleeve is provided with an oil guide hole which is a through hole communicating the inside and the outside of the inner cylinder sleeve, two outlets are located on the same side of the pistons and arranged , the outlet on the outer wall is close to the pistons, and the outlet arranged on the inner wall is arranged at the end far away from the piston. An oil pipe of the oil cylinder is not stretched, shortened or bended with reciprocating movement of the tail-stage piston rod, so that the oil cylinder prevents the oil pipe from being collided and interfered with the tail-stage piston rod in reciprocating movement and being abraded. The piston rod is of a solid structure, and is better in rigidity, low in processing cost and compact in radial size.

Description

The solid standard double-acting multistage hydraulic cylinder of a kind of piston rod
 
Technical field
The present invention relates to a kind of oil hydraulic cylinder, especially relate to the solid standard double-acting multistage hydraulic cylinder of a kind of piston rod.
Background technique
For multilevel double-action cylinder, its oil inlet and outlet all or one be arranged on the external part of hollow piston rod, for example the public technology of " double-acting multilevel hydraulic cylinder " (notice of authorization CN 201763722U) by name is exactly this structure, it comprises outer shell seam, lifting hydraulic fluid port and retraction hydraulic fluid port, is provided with one-level guide sleeve, primary seal spare, first stage piston assembly parts, secondary guide sleeve, secondary seal, second piston assembly parts, thick stick plug guide sleeve, thick stick plug Sealing and thick stick plug welding in the outer shell seam and closes; Lifting hydraulic fluid port and retraction hydraulic fluid port are fixed on the end that the thick stick plug welding is closed; Be respectively equipped with oilhole first far away and oilhole second far away on first stage piston assembly parts and the second piston assembly parts, the oilhole first far away of first stage piston assembly parts and second piston assembly parts and oilhole second place far away are provided with respectively groove first and groove second.This structure, oil pipe moves back and forth and extends, shortens and crooked with piston rod, and oil pipe and reciprocating final stage piston rod easily bump and interfere and wear and tear.
, the 2nd, oil inlet and outlet is fixed on the cylinder barrel, be different from previous two-action multi-stage cylinder wherein a hydraulic fluid port be arranged on the external part of hollow piston rod; Oil inlet and outlet is fixed on remarkable advantage on the cylinder barrel and is that oil pipe can fix, and oil pipe is moving back and forth and extend and shorten with piston rod not.
Summary of the invention
Main purpose of the present invention provides a kind of multistage double-act-ing hydraulic J-Horner of avoiding oil pipe and reciprocating final stage piston rod to bump and interfere and wear and tear.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: the solid standard double-acting multistage hydraulic cylinder of a kind of piston rod, the some grades of inner cylinder liners that it comprises one-level cylinder sleeve, piston, piston rod and comprises the final stage cylinder sleeve, piston rod is located in the final stage cylinder sleeve, it is characterized in that: described piston rod is solid hopkinson bar, and described one-level cylinder sleeve bottom is provided with oil inlet hole, the other end is provided with oil outlet; Every grade of inner cylinder liner has piston in the external stability of an end of close oil inlet hole, every grade of inner cylinder liner is provided with oil guiding hole, oil guiding hole is the inside and outside through hole of conducting inner cylinder liner, and two outlets are positioned at the same side of piston, is located at the outlet adjacent piston of outer wall, the outlet that is located at inwall is located at the end away from piston.By being provided with oil guiding hole, the inner chamber of every grade of inner cylinder liner of conducting and exocoel, oil guiding hole be from inner chamber away from piston end be conducting to exocoel near piston position, make the inside and outside piston of inner cylinder liner all can have larger stroke, after oil cylinders at different levels stretch out fully, homonymy chamber at different levels all can keep being communicated with, so, need not at piston rod hydraulic fluid port to be set; Two oil inlet and outlets all are fixed on the one-level cylinder barrel, the oil pipe that is connected with hydraulic fluid port can be made into the oil pipe of rigidity, oil pipe does not extend, shortens with the to-and-fro motion of final stage piston rod and be crooked, avoids oil pipe and reciprocating final stage piston rod to bump and interferes and wearing and tearing.Oil inlet hole, oil outlet all be located at and the one-level cylinder barrel on, the hole processing on the piston rod, the processing in hole is easier on the one-level cylinder barrel.
In addition, piston rod is solid hopkinson bar, is convenient to the manufacturing processing of piston rod, has saved the welding process of oil pipe and hollow piston rod, and manufacturing process is more simple and direct; The quality index such as the straightness accuracy of solid piston bar, circularity and tolerance of size more easily guarantee than hollow piston rod; The oil leakage phenomenon of having avoided the welding of hollow piston rod and oil pipe to cause because of weld defects; Because the final stage piston rod is solid standard, has reduced the diameter of final stage piston rod, the radial dimension of oil cylinder is more compact.
As preferably, described one-level cylinder sleeve comprises steel cylinder, and steel cylinder one end arranges cylinder bottom and consists of closed end; At the other end away from closed end, one-level cylinder sleeve internal chamber wall arrange guide sleeve and with consist of with inner cylinder liner and be sealed and matched and be slidingly matched, the internal chamber wall of this inner cylinder liner arrange guide sleeve with another grade inner cylinder liner or piston rod with in it consist of and be sealed and matched and be slidingly matched.Guide sleeve is convenient to and the processing of cylinder sleeve and inner cylinder liner, the more important thing is to be beneficial to hydraulic fluid port setting on the inner cylinder liner, makes it be beneficial in the position, adjust in shape and control, and avoids and piston interference.
As preferably, guide sleeve is ring-type, and its outer circumferential face arranges thread section, and its inwall arranges dust ring, seal ring and lining; The guide sleeve inwall arranges one section groove, and lining embeds in this groove.Thread section on the outer circumferential face makes guide sleeve be easy to fix, and makes its connection part in the inside of inner cylinder liner, avoids increasing space outerpace and takies.As the parts that are slidingly matched with inner cylinder liner or piston rod, avoid the guide sleeve wearing and tearing with lining, make guide sleeve that dustproof, seal action only is provided, thus reduce guide sleeve manufacture difficulty, improve its working life; Lining is easy to change, and is beneficial to save the maintenance cost.Adopt the structure of groove, make things convenient for the assembling of lining, and be easy to fix.
Hide all or part of of oil guiding hole outlet if piston seals in movement, will block oil circuit, or make the oil circuit circulation not smooth, as preferably, the circumference of piston inner hole one end is provided with the inner groove of annular, and the sidewall of inner groove is provided with the hole; One outlet of oil guiding hole passes into this inner groove.When inner cylinder liner stretched out fully, the piston abuts on its periphery was to the guide sleeve sidewall, and at this moment, the oil in the oil guiding hole flows into the inner groove of piston, goes out by the orifice flow on the inner groove sidewall again, makes the maximized while of piston stroke, keeps the unimpeded of oil circuit.
As preferably, the hole on the sidewall of inner groove and side wall ends connect.This structure makes liquid stream except passing into the sidewall periphery face, also can pass into side wall ends, makes liquid stream more unimpeded, and at this moment, this pore structure can be circular hole, semicircle orifice or bar-shaped trough.
As preferably, another outlet of oil guiding hole is annular groove, and annular groove is located on the inner cylinder liner inner peripheral wall at place; When piston moved to the most left end, annular groove held the end of piston.Ensure effective flow area, effective flow area of avoiding the passage between piston and the inner cylinder liner is less and cause liquid stream not smooth, also effectively protects the Sealing on it; In addition, so that hydraulic jack has been avoided the resistance of rod chamber back pressure in running, greatly improve the load efficiency of oil cylinder, saved the energy.
Therefore, that the present invention has is rational in infrastructure, be easy to characteristics, especially oil inlet hole, the oil outlets such as making is arranged on the one-level cylinder barrel.
1, piston rod is solid formula structure.Compared to the structure that oil duct is set, solid formula structural rigidity is better, and processing cost is low, and radial dimension is more compact.
2, oil inlet and outlet is fixed on the cylinder barrel, and oil pipe can be fixed, and with the moving back and forth and extend, shorten and bend of piston rod, can effectively not avoid oil pipe and reciprocating final stage piston rod to bump and interfere and wearing and tearing.
3, the cylinder barrel barrel at secondary cylinder barrel and three grades of cylinder barrels axially designs oil through, and oil through can not scratch reciprocating hole seal ring.
4, hydraulic jack has been avoided the resistance of rod chamber back pressure in running, has improved the load efficiency of oil cylinder, has saved the energy.
 
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present invention.
 
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technological scheme of the present invention is described in further detail.
Embodiment: the solid standard double-acting multistage hydraulic cylinder of a kind of piston rod of the present invention, as shown in Figure 1, comprise one-level cylinder sleeve 30, piston 15, piston rod 1 and some grades of inner cylinder liners that comprise final stage cylinder sleeve 13, piston rod 1 is located in the final stage cylinder sleeve 13; Piston rod 1 is solid hopkinson bar, and one-level cylinder sleeve 30 bottoms are provided with oil inlet hole 21, the other end is provided with oil outlet 22; Every grade of inner cylinder liner has piston 16,18 in the external stability of an end of close oil inlet hole 21, every grade of inner cylinder liner is provided with oil guiding hole 23, oil guiding hole 23 is the inside and outside through hole of conducting inner cylinder liner, and two outlets are positioned at the same side of piston, are located at the outlet adjacent piston of outer wall, the outlet that is located at inwall is located at the end away from piston.
One-level cylinder sleeve 30 comprises steel cylinder 11, and steel cylinder 11 1 ends arrange cylinder bottom 19 and consist of closed end; At the other end away from closed end, one-level cylinder sleeve 30 internal chamber walls arrange guide sleeve 5 and with consist of with inner cylinder liner and be sealed and matched and be slidingly matched, the internal chamber wall of this inner cylinder liner arrange guide sleeve 2,3 with another grade inner cylinder liner or piston rod 1 with in it consist of and be sealed and matched and be slidingly matched.
Guide sleeve 5 is ring-type, and its outer circumferential face arranges thread section, and its inwall arranges dust ring 4, seal ring 6 and lining 10; Guide sleeve 5 inwalls arrange one section groove, and lining 10 embeds in this groove.
The circumference of piston 15,16,18 endoporus, one end is provided with the inner groove 141 of annular, and the sidewall of inner groove 141 is provided with hole 142, and hole 142 connects with side wall ends; One outlet of oil guiding hole 23 passes into this inner groove 141, and another outlet is annular groove 231, and annular groove 231 is located on the inner cylinder liner inner peripheral wall at place; When piston 15 moved to the most left end, annular groove 231 held the end of piston 15.Seal ring 14,20,21 is set on the piston 15,16,18.
During use, by being provided with oil guiding hole 23, the inner chamber of every grade of inner cylinder liner of conducting and exocoel, oil guiding hole 23 be from inner chamber away from piston end be conducting to exocoel near piston position, homonymy chamber at different levels all can keep being communicated with, so, need not at piston rod hydraulic fluid port to be set.When inner cylinder liner stretched out fully, the piston abuts on its periphery was to the guide sleeve sidewall, and at this moment, the oil in the oil guiding hole flows into the inner groove of piston, goes out by the orifice flow on the inner groove sidewall again.
The below illustrates with three grades of double acting cylinders, as shown in Figure 1, when the oil inlet hole 21 of pressure oil by cylinder bottom enters oil cylinder rodless cavity, left-hand stretches out successively under the effect of pressure oil for first stage piston bar assembly (secondary cylinder sleeve 12 forms with piston 15), second piston rod assembly (final stage cylinder sleeve 13 forms with piston 16) and three grades of piston rod assemblies (piston rod 1 forms with piston 18), and the air of rod chambers at different levels and hydraulic oil are expelled to fuel tank by the through hole in two, three grades of cylinder barrel barrels by oil outlet 22 in the oil cylinder.When piston rod assemblies at different levels need to be retracted, then pressure oil enters rod chambers at different levels by the through hole in the inwall of oil outlet 22 and secondary cylinder sleeve 12, final stage cylinder sleeve 13, piston rod assemblies at different levels successively dextrad are retracted, and the fluid of rod chamber is expelled to fuel tank by the oil inlet hole 21 on the cylinder bottom.
For the present invention, have following features:
1, the present invention with double-acting multistage hydraulic cylinder final stage piston rod by the advantage that previous hollow standard changes solid standard into is: 1) be convenient to the manufacturing processing of piston rod, saved the welding process of oil pipe and hollow piston rod, manufacturing process is more simple and direct.2) quality index such as the straightness accuracy of solid piston bar, circularity and tolerance of size more easily guarantee than hollow piston rod.3) oil leakage phenomenon of having avoided the welding of hollow piston rod and oil pipe to cause because of weld defects.4) because the final stage piston rod is solid standard, reduced the diameter of final stage piston rod, the radial dimension of oil cylinder is more compact.
2, the present invention is arranged on stretching out of final stage piston rod with previous two hydraulic fluid ports of two used multistage hydraulic cylinder
End changes into two hydraulic fluid ports is fixed on the cylinder bottom of one-level cylinder barrel cylindrical and one-level cylinder barrel, its objective is that the oil pipe that is connected with hydraulic fluid port can be made into the fixedly oil pipe of rigidity, oil pipe does not extend, shortens with the to-and-fro motion of final stage piston rod and be crooked, avoids the interference that bumps of oil pipe and reciprocating final stage piston rod.
3, the present invention directly upwards arranges the axial oil through that arranges that oil through changes two, three grades of cylinder barrel barrels into previous Double Acting Telescopic Hydraulic Cylinder at two, three grades of cylinder barrel barrels, hole on the piston is with the radially oil through that no longer passes through in the to-and-fro motion of seal ring in steel cylinder on the barrel, avoid the hole on the piston to cross hydraulic fluid port with seal ring and be scratched, fundamentally guaranteed reliability, durability and the sealability of oil cylinder.
4, the present invention has eliminated the situation (rodless cavity and rod chamber were connected with hydraulic oil simultaneously when two, three grades of cylinder barrels stretched out) that previous Double Acting Telescopic Hydraulic Cylinder rod chamber when two, three grades of cylinder barrels stretch out has back pressure, so that hydraulic jack has been avoided the resistance of rod chamber back pressure in running, greatly improve the load efficiency of oil cylinder, saved the energy.

Claims (6)

1. solid standard double-acting multistage hydraulic cylinder of piston rod, comprise one-level cylinder sleeve (30), piston (15), piston rod (1) and some grades of inner cylinder liners that comprise final stage cylinder sleeve (13), piston rod (1) is located in the final stage cylinder sleeve (13), it is characterized in that: described piston rod (1) is solid hopkinson bar, and one-level cylinder sleeve (30) bottom is provided with oil inlet hole (21), the other end is provided with oil outlet (22); Every grade of inner cylinder liner has piston (16,18) in the external stability of an end of close oil inlet hole (21), every grade of inner cylinder liner is provided with oil guiding hole (23), oil guiding hole (23) is the inside and outside through hole of conducting inner cylinder liner, and two outlets are positioned at the same side of piston, are located at the outlet adjacent piston of outer wall, the outlet that is located at inwall is located at the end away from piston.
2. the solid standard double-acting multistage hydraulic cylinder of a kind of piston rod according to claim 1, it is characterized in that: described one-level cylinder sleeve (30) comprises steel cylinder (11), steel cylinder (11) one ends arrange cylinder bottom (19) and consist of closed end; At the other end away from closed end, one-level cylinder sleeve (30) internal chamber wall arrange guide sleeve (5) and with consist of with inner cylinder liner and be sealed and matched and be slidingly matched, the internal chamber wall of this inner cylinder liner arrange guide sleeve (2,3) with another grade inner cylinder liner or piston rod (1) with in it consist of and be sealed and matched and be slidingly matched.
3. the solid standard double-acting multistage hydraulic cylinder of a kind of piston rod according to claim 1 is characterized in that: guide sleeve (5) is ring-type, and its outer circumferential face arranges thread section, and its inwall arranges dust ring (4), seal ring (6) and lining (10); Guide sleeve (5) inwall arranges one section groove, and lining (10) embeds in this groove.
4. according to claim 1 and 2 or the solid standard double-acting multistage hydraulic cylinder of 3 described a kind of piston rods, it is characterized in that: the circumference of piston (15,16,18) endoporus one end is provided with the inner groove (141) of annular, and the sidewall of inner groove (141) is provided with hole (142); One outlet of oil guiding hole (23) passes into this inner groove (141).
5. the solid standard double-acting multistage hydraulic cylinder of a kind of piston rod according to claim 4 is characterized in that: hole (142) and side wall ends perforation.
6. the solid standard double-acting multistage hydraulic cylinder of a kind of piston rod according to claim 4 is characterized in that: another outlet of oil guiding hole (23) is annular groove (231), and annular groove (231) is located on the inner cylinder liner inner peripheral wall at place; When piston (15) moved to the most left end, annular groove (231) held the end of piston (15).
CN201210261324.1A 2012-07-26 2012-07-26 A kind of Double-action multistage hydraulic oil cylinder with solid piston rod Expired - Fee Related CN102852896B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104088847A (en) * 2014-07-02 2014-10-08 武汉华中天纬光电系统有限公司 Hydraulic machine
CN106593992A (en) * 2016-12-23 2017-04-26 襄阳中铁宏吉工程技术有限公司 Antenna elevating multi-stage oil cylinder

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2443192Y (en) * 2000-10-23 2001-08-15 锦州万得汽车减振器有限公司 Sealing structure for vibration damper
JP2002070809A (en) * 2000-08-30 2002-03-08 Komatsu Ltd Double-acting multistage cylinder
CN2632388Y (en) * 2002-04-24 2004-08-11 王明珠 Assembled sealed shock absorber of motor vehicle
CN2931926Y (en) * 2006-01-20 2007-08-08 陆凯 Variable damping oil/gas separated shock absorber
CN201358975Y (en) * 2008-07-11 2009-12-09 山东锐驰机械有限公司 Novel hydraulic cylinder
CN201606344U (en) * 2010-01-29 2010-10-13 湖南特力液压有限公司 Double-acting multistage hydraulic cylinder
CN201763722U (en) * 2010-09-16 2011-03-16 秦洪明 Double-acting multilevel hydraulic cylinder
CN201786808U (en) * 2010-07-06 2011-04-06 深圳市凯卓立液压设备有限公司 Oil cylinder structure
CN201827169U (en) * 2010-10-12 2011-05-11 济南东奥自控技术有限公司 Multilevel hydraulic cylinder with front-mounted hydraulic fluid port
CN202031912U (en) * 2011-03-11 2011-11-09 厦门银华机械有限公司 Clamp key and clamp ring positioning structure of hydraulic multistage cylinder
CN202031915U (en) * 2011-03-22 2011-11-09 泸州市巨力液压有限公司 Double-acting multistage hydraulic cylinder
JP4864579B2 (en) * 2006-07-14 2012-02-01 サンマックス株式会社 Multistage telescopic support
CN202165594U (en) * 2011-07-27 2012-03-14 江苏国力锻压机床有限公司 Plunger oil cylinder of hydraulic press
CN202274085U (en) * 2011-10-31 2012-06-13 湖南特力液压有限公司 Piston cylinder
CN202718958U (en) * 2012-07-26 2013-02-06 孙斌 Multistage double-acting hydraulic oil cylinder

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002070809A (en) * 2000-08-30 2002-03-08 Komatsu Ltd Double-acting multistage cylinder
CN2443192Y (en) * 2000-10-23 2001-08-15 锦州万得汽车减振器有限公司 Sealing structure for vibration damper
CN2632388Y (en) * 2002-04-24 2004-08-11 王明珠 Assembled sealed shock absorber of motor vehicle
CN2931926Y (en) * 2006-01-20 2007-08-08 陆凯 Variable damping oil/gas separated shock absorber
JP4864579B2 (en) * 2006-07-14 2012-02-01 サンマックス株式会社 Multistage telescopic support
CN201358975Y (en) * 2008-07-11 2009-12-09 山东锐驰机械有限公司 Novel hydraulic cylinder
CN201606344U (en) * 2010-01-29 2010-10-13 湖南特力液压有限公司 Double-acting multistage hydraulic cylinder
CN201786808U (en) * 2010-07-06 2011-04-06 深圳市凯卓立液压设备有限公司 Oil cylinder structure
CN201763722U (en) * 2010-09-16 2011-03-16 秦洪明 Double-acting multilevel hydraulic cylinder
CN201827169U (en) * 2010-10-12 2011-05-11 济南东奥自控技术有限公司 Multilevel hydraulic cylinder with front-mounted hydraulic fluid port
CN202031912U (en) * 2011-03-11 2011-11-09 厦门银华机械有限公司 Clamp key and clamp ring positioning structure of hydraulic multistage cylinder
CN202031915U (en) * 2011-03-22 2011-11-09 泸州市巨力液压有限公司 Double-acting multistage hydraulic cylinder
CN202165594U (en) * 2011-07-27 2012-03-14 江苏国力锻压机床有限公司 Plunger oil cylinder of hydraulic press
CN202274085U (en) * 2011-10-31 2012-06-13 湖南特力液压有限公司 Piston cylinder
CN202718958U (en) * 2012-07-26 2013-02-06 孙斌 Multistage double-acting hydraulic oil cylinder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104088847A (en) * 2014-07-02 2014-10-08 武汉华中天纬光电系统有限公司 Hydraulic machine
CN106593992A (en) * 2016-12-23 2017-04-26 襄阳中铁宏吉工程技术有限公司 Antenna elevating multi-stage oil cylinder

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