CN105443493A - Multi-stage hydraulic cylinder with automatic compensating device - Google Patents

Multi-stage hydraulic cylinder with automatic compensating device Download PDF

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Publication number
CN105443493A
CN105443493A CN201510976219.XA CN201510976219A CN105443493A CN 105443493 A CN105443493 A CN 105443493A CN 201510976219 A CN201510976219 A CN 201510976219A CN 105443493 A CN105443493 A CN 105443493A
Authority
CN
China
Prior art keywords
hydraulic cylinder
piston
oil cylinder
piston rod
rod
Prior art date
Application number
CN201510976219.XA
Other languages
Chinese (zh)
Inventor
朱静明
陈俊杰
Original Assignee
上海华岛液压设备制造有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 上海华岛液压设备制造有限公司 filed Critical 上海华岛液压设备制造有限公司
Priority to CN201510976219.XA priority Critical patent/CN105443493A/en
Publication of CN105443493A publication Critical patent/CN105443493A/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1409Characterised by the construction of the motor unit of the straight-cylinder type with two or more independently movable working pistons
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423Component parts; Constructional details
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2215/00Fluid-actuated devices for displacing a member from one position to another
    • F15B2215/30Constructional details thereof

Abstract

The invention discloses a multi-stage hydraulic cylinder with an automatic compensating device so as to solve the stroke error problem of a large piston rod. The multi-stage hydraulic cylinder with the automatic compensating device comprises an outer hydraulic cylinder pipe, a large piston rod, a small piston rod, a hydraulic cylinder base and a hydraulic cylinder automatic compensating device, wherein the hydraulic cylinder automatic compensating device comprises an oil seal, a check valve element, a spring, a locking nut, a retaining screw and a large piston, the oil seal is arranged on the check valve element, the spring is arranged on a valve rod of the check valve element in a sleeving manner, the locking nut is arranged at one end of the spring on the valve rod of the check valve element, the retaining screw is arranged on the locking nut, the check valve element is arranged in a check valve element hole in the large piston, the outer hydraulic cylinder pipe is fixedly connected with the hydraulic cylinder base, the large piston rod is arranged on the large piston in the outer hydraulic cylinder pipe, and the small piston rod is arranged on a small piston in the large piston rod. The hydraulic cylinder automatic compensating device is simple in structure, is convenient to use, is safe and reliable and can be widely applied to the multi-stage hydraulic cylinder.

Description

With the multistage hydraulic cylinder of automatic compensator

Technical field

The present invention relates to a kind of oil hydraulic cylinder, particularly relate to a kind of multistage hydraulic cylinder with automatic compensator.

Background technique

Oil hydraulic cylinder is a kind of conventional control unit in hydraulic control system, generally main as Stroke Control, wherein single stage hydraulic cylinder is many, and for requiring that start bit sets low, the occasion of stroke length all adopts multistage hydraulic cylinder (also claiming multi-stage oil cylinder), this multistage hydraulic cylinder in use, owing to inevitably producing oily foam between piston and piston in cylinder wall in movement process, and this oily foam produces accumulation with increasing of to-and-fro motion number of times, be trapped in, between lower second piston seat, cause upper level piston seat can not get back to initial position (or claim final position) when declining and cause the journey error of piston rod, another problem is: for two-stage hydraulic cylinder, and when large piston rises to extreme higher position, small piston also rises under large piston promotes, but when the epicoele shortage of oil of large piston, small piston rod just pushes away the journey error causing small piston rod less than assigned position.Current solution gets rid of the oily foam of accumulation by artificial unloading's oil cylinder seat and outside oil cylinder tube wall sets up a recharging oil device and come to large piston upper chamber repairing.This solution is installed to after on equipment for oil cylinder and solves quite trouble, can only by getting rid of the problems referred to above after manual operations dismounting oil cylinder.

Summary of the invention

The object of the invention is to provide a kind of multistage hydraulic cylinder with automatic compensator, by arranging oil cylinder automatic compensator, to solve the multistage hydraulic cylinder stroke accumulated error problem not obtaining for a long time solving very well always.

The multistage hydraulic cylinder of band automatic compensator of the present invention can adopt following technological scheme to be implemented: it comprises outer oil cylinder pipe, large piston rod, small piston rod, oil cylinder seat and automatic compensator, and wherein said automatic compensator is oil cylinder automatic compensator.Described oil cylinder automatic compensator comprises oil sealing, nonreturn valve core, spring, holds out against nut, stopping screw and large piston, here oil sealing is contained on nonreturn valve core, spring housing is on the valve rod of nonreturn valve core, hold out against one end that nut is contained in the valve rod upper spring of nonreturn valve core, stopping screw is contained in hold out against on nut and prevents nut loosening, and nonreturn valve core is contained in the one-way valve core bore on large piston.All the other structures such as large piston is contained between large piston rod and oil cylinder seat, outer oil cylinder pipe and oil cylinder seat connect fixing, large piston rod is contained on the large piston in outer oil cylinder pipe, and small piston rod is contained on the small piston in large piston rod, etc. structure and component same as the prior art or similar.

Compared with prior art, its outstanding advantages is the multistage hydraulic cylinder of the band auto-compensation designed and produced according to technique scheme:

1, the design of oil cylinder automatic compensator, thoroughly solves small piston rod and replys the journey error produced less than initial position;

2, due to the design of oil cylinder automatic compensator, thoroughly to solve when large piston upper chamber owes oil and the journey error causing small piston rod can not arrive assigned position to produce;

3, the whole course of action of oil cylinder automatic compensator automatically completes in oil cylinder running, and structure is simple, safe and reliable to operation.

Accompanying drawing explanation

Fig. 1 is the multistage hydraulic cylinder structural representation of band automatic compensator of the present invention.

Fig. 2 is oil cylinder automatic compensator structural representation (opening state) of the present invention.

Fig. 3 is oil cylinder automatic compensator structural representation (closed condition) of the present invention.

Embodiment

Below in conjunction with drawings and Examples, the present invention is further described.

As Fig. 1, Fig. 2, shown in Fig. 3, the multistage hydraulic cylinder of band automatic compensator of the present invention, comprise outer oil cylinder pipe 1, large piston rod 2, small piston rod 3, oil cylinder seat 5 and oil cylinder automatic compensator 4, wherein oil cylinder automatic compensator 4 comprises oil sealing 41, nonreturn valve core 42, spring 43, hold out against nut 44, stopping screw 45, large piston 46, here oil sealing 41 is contained on nonreturn valve core 42, spring 43 is enclosed within the valve rod of nonreturn valve core, hold out against one end that nut 44 is contained in the valve rod upper spring 43 of nonreturn valve core, stopping screw 45 is contained in and holds out against on nut, nonreturn valve core 42 is contained in the one-way valve core bore on large piston 46.All the other structures are as large piston is contained between large piston rod 2 and oil cylinder seat 5, outer oil cylinder pipe 1 and oil cylinder seat 5 connect fixing, large piston rod 2 is contained on the large piston 46 in outer oil cylinder pipe 1, and small piston rod 3 is contained on the small piston in large piston rod 2, etc. structure and component same as the prior art or similar.

Its working principle of multistage hydraulic cylinder of the band auto-compensation made according to above-mentioned embodiment is similar to multistage hydraulic cylinder of the prior art.Key is install automatic compensator (i.e. oil cylinder automatic compensator) on large piston after, when the oily foam that small piston repeatedly accumulates bottom small piston and between large piston head after back and forth movement under large piston promotes reaches a certain amount of, when large piston drops to bottom, under the effect of oil pressure, the one-way valve on automatic compensator is opened when small piston also drops to low side, be trapped in large, oily foam between small piston is discharged from large piston base, small piston is enable to automatically return to final position (i.e. large piston tip), eliminate and (during rising, claim start position because returning when small piston declines less than final position, final position is claimed during decline) journey error that produces, and when large piston promotes small piston rising, because large piston upper chamber owes oil, when small piston is pushed away less than regulation lifting height, promote to open one-way valve by large piston cavity of resorption oil pressure, to the automatic repairing of large piston upper chamber, guarantee that small piston rod can rise to and require position.This oil cylinder automatic compensator is widely used in multi-stage oil cylinder, and structure is simple, esy to use, safe and reliable.

Claims (1)

1. the multistage hydraulic cylinder with automatic compensator, comprise outer oil cylinder pipe (1), large piston rod (2), small piston rod (3), oil cylinder seat (5) and automatic compensator, it is characterized in that: described automatic compensator is oil cylinder automatic compensator (4), described oil cylinder automatic compensator (4) comprises oil sealing (41), nonreturn valve core (42), spring (43), hold out against nut (44), stopping screw (45) and large piston (46), wherein oil sealing (41) is contained on nonreturn valve core (42), spring (43) is enclosed within the valve rod of nonreturn valve core, hold out against one end that nut (44) is contained in the valve rod upper spring (43) of nonreturn valve core, stopping screw (45) is contained in and holds out against on nut, nonreturn valve core (42) is contained in the one-way valve core bore on large piston (46).
CN201510976219.XA 2015-12-23 2015-12-23 Multi-stage hydraulic cylinder with automatic compensating device CN105443493A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510976219.XA CN105443493A (en) 2015-12-23 2015-12-23 Multi-stage hydraulic cylinder with automatic compensating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510976219.XA CN105443493A (en) 2015-12-23 2015-12-23 Multi-stage hydraulic cylinder with automatic compensating device

Publications (1)

Publication Number Publication Date
CN105443493A true CN105443493A (en) 2016-03-30

Family

ID=55554031

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510976219.XA CN105443493A (en) 2015-12-23 2015-12-23 Multi-stage hydraulic cylinder with automatic compensating device

Country Status (1)

Country Link
CN (1) CN105443493A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106089849A (en) * 2016-08-25 2016-11-09 广州本图机械有限公司 A kind of Multi-stage lifting oil cylinder of stabilized structure

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0775834A2 (en) * 1995-11-21 1997-05-28 Raymond Keith Foster Hydraulic valve
JP2008014340A (en) * 2006-07-03 2008-01-24 Ntn Corp Hydraulic auto-tensioner
CN201050516Y (en) * 2007-06-04 2008-04-23 南通液压机械有限公司 Multi-stage synchronous extension double-acting hydraulic cylinder
CN203362691U (en) * 2013-07-10 2013-12-25 宁波如意股份有限公司 Oil return device of piston type oil cylinder
CN103603975A (en) * 2013-11-26 2014-02-26 湖南特力液压有限公司 Check valve with push rod and multi-stage hydraulic cylinder
CN205260482U (en) * 2015-12-23 2016-05-25 上海华岛液压设备制造有限公司 Take multistage hydraulic cylinder of automatic compensation device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0775834A2 (en) * 1995-11-21 1997-05-28 Raymond Keith Foster Hydraulic valve
JP2008014340A (en) * 2006-07-03 2008-01-24 Ntn Corp Hydraulic auto-tensioner
CN201050516Y (en) * 2007-06-04 2008-04-23 南通液压机械有限公司 Multi-stage synchronous extension double-acting hydraulic cylinder
CN203362691U (en) * 2013-07-10 2013-12-25 宁波如意股份有限公司 Oil return device of piston type oil cylinder
CN103603975A (en) * 2013-11-26 2014-02-26 湖南特力液压有限公司 Check valve with push rod and multi-stage hydraulic cylinder
CN205260482U (en) * 2015-12-23 2016-05-25 上海华岛液压设备制造有限公司 Take multistage hydraulic cylinder of automatic compensation device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106089849A (en) * 2016-08-25 2016-11-09 广州本图机械有限公司 A kind of Multi-stage lifting oil cylinder of stabilized structure

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Application publication date: 20160330

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