EP0979357B1 - Hydrostatischer antrieb zum heben und senken und zum halten von lasten, insbesondere für aufzüge - Google Patents
Hydrostatischer antrieb zum heben und senken und zum halten von lasten, insbesondere für aufzüge Download PDFInfo
- Publication number
- EP0979357B1 EP0979357B1 EP98914771A EP98914771A EP0979357B1 EP 0979357 B1 EP0979357 B1 EP 0979357B1 EP 98914771 A EP98914771 A EP 98914771A EP 98914771 A EP98914771 A EP 98914771A EP 0979357 B1 EP0979357 B1 EP 0979357B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- working cylinder
- lifting piston
- lifting
- 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.)
- Expired - Lifetime
Links
- 230000002706 hydrostatic effect Effects 0.000 title claims description 8
- 238000006073 displacement reaction Methods 0.000 title 1
- 125000006850 spacer group Chemical group 0.000 claims description 11
- 239000012530 fluid Substances 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
- B66B9/04—Kinds or types of lifts in, or associated with, buildings or other structures actuated pneumatically or hydraulically
Definitions
- the invention relates to a hydrostatic drive for lifting and Lowering and holding loads, especially for elevators, with one connected to a pressure medium source, one working cylinder, a in the working cylinder sealingly guided piston and one in Working cylinder arranged guide rod that into the interior of the Piston protrudes, which surrounds the guide rod sealingly, the end of the reciprocating piston projecting into the pressure chamber forms annular, pressurized face.
- Such a drive is known from AT-PS 385 018, which is used for lifting and lowering loads over great heights.
- This Drive is supposed to be that the end protruding into the working cylinder of the reciprocating piston sealingly on the guide rod, security can be improved against buckling. Otherwise because of the kink resistance necessary large diameter of the massive piston is now by the annular face that replaces the work surface of the Reciprocating piston forms. The hollow because of the annular face The piston is not pressurized on the inside.
- Known drive is the total lifting power with each lifting operation solely from that located in the pressure chamber of the working cylinder applied the annular end face pressure medium, the is fed to the working cylinder with variable pressure. The whole Lifting force acts here over the entire length of the lifting piston. To the To ensure kink resistance, the wall thickness of the piston must be dimensioned accordingly large.
- One disadvantage is that the working surface of the piston increases with increasing length, the flow rate increases and requires a larger pump.
- the invention has for its object a known hydrostatic drive in terms of buckling safety improve so that longer lengths are possible.
- a hollow reciprocating piston 1 which at its upper end by a End wall 2 is closed.
- the lower end 3 of the vertical arranged piston 1 is somewhat thickened on its inside and on a guide rod 15 slidably guided with its lower end 16 in a base plate 20 of a working cylinder 10 is attached.
- a mechanical seal 4 is embedded, so that it acts as a pressure chamber acting interior of the piston 1 tightly from the inside of the working cylinder 10 is separated.
- the upper end 11 of the working cylinder 10 is also thickened on the inside and with a mechanical seal 12 provided that abuts the outside of the reciprocating piston 1.
- a pressure medium line 23 is connected to the outside is that comes from a pressure medium source 30, the pressure medium with in supplies essential constant pressure P2.
- the bore 21 opens into the inside of the working cylinder 10, which delimits a pressure chamber 13.
- a further bore 22 is provided in the base plate 20, on which outside a pressure medium line 24 is connected by a second pressure medium source 40 comes in the form of a feed pump that Pressure medium with variable pressure P1 delivers.
- the top of the Bore 22 opens into one in the guide rod 15 axial channel 17 which at its upper end 18 in the pressure chamber 7 of the Reciprocating piston 1 opens.
- the pressure source 30 consists of an electric motor 31 driven feed pump 32, the pressure medium from a tank 39th sucks and via the pressure medium line 23 into the pressure chamber 13 of the Working cylinder 10 promotes.
- a valve 33 which is a switching or proportional directional control valve can be that in the position shown the pressure medium flow isolates and in another position pressure medium to the pressure chamber 13 can flow through.
- an overflow line 35 branches off from line 34 Pressure relief valve 36, which leads back into the tank 39.
- the Feed pump 42 is also driven by an electric motor 41 and sucks pressure medium from a tank 39.
- her line 22 In her line 22 is a valve 43 arranged which is a switching or Proportionalwegventil can be, analog to the valve 33 two Can take end positions.
- An overflow line 45 with a pressure relief valve 45 is similar to the feed pump 32 in the Feed pump 42 available.
- the feed pump 42 also supplies pressure medium a variable pressure P1 in the pressure chamber 7 of the reciprocating piston 1.
- Spacer ring 25 attached, the flexible tension elements 26 to Example wire ropes, suspended at the lower end 3 of the reciprocating piston 1 is.
- a further spacer ring 25 'as required is the same attached below the spacer ring 25, which in the drawn position of the reciprocating piston 1 still on the base plate 20th rests.
- the spacer rings 25 and 25 ' serve to buckle the To prevent guide rod 15. You move smoothly with it Reciprocating piston 1 up and down, being in the lowest position of the Piston of the spacer ring 25 to lie on the spacer ring 25 ' can come.
- the pressure medium can freely in the Spread out entire interior 13.
- the piston 1 is over his Length distributed with one or more spacer rings 27 as required provided, when moving the piston on the guide rod 15th slide and serve as protection against buckling of the reciprocating piston 1.
- the pressure medium with the pressure P2 in the pressure chamber 13 of the working cylinder 10 acts on an annular end face 5 at the lower end 3 of the Reciprocating piston 1.
- the end face 5 forms an annular work surface A2, as shown on the right in FIG. 1.
- the interior of the Reciprocating piston 1 forms the further pressure chamber 7, in which the pressure medium the pressure medium source 40 acts with the variable pressure P1.
- a further work surface 6 the Size of the inner diameter of the working surface A2 is determined.
- she is shown separately in FIG. 1 on the right as circular area A1.
- a throttle rod 60 is attached, which is coaxial with Channel 17 is arranged in the guide rod 15.
- the lower half the throttle rod 60 is slightly tapered downwards educated.
- the pressure medium with the pressure P2 of substantially constant Size creates a constant on the work surface A2 Lifting force that is approximately so large that, depending on the need, e.g. about 90% the mass of a car on the upper end of the piston 1 supported elevator corresponds. This part of the mass is in Fig. 1st indicated by arrow F2. Thus, part of the car mass balanced and is in balance with the lifting force.
- FIG. 2 is that of the reciprocating piston 1, the working cylinder 10 and the guide rod 15 existing drive constructed the same as in Fig. 1.
- a vertical additional cylinder 50 is provided, in which a Additional piston 55 is guided sealingly.
- a Counterweight 57 attached on the additional piston 55 is a Counterweight 57 attached; which is about 90% of the mass of that on the Reciprocating piston 1 supported car 62 corresponds.
- the crowd is with M denotes.
- the underside of the vertically arranged auxiliary piston 55 forms a third work surface 56, the size of which is to the left of the Additional piston 55 shown separately in Fig. 2 and designated A3 is.
- Feed pump 42 connected, the pressure medium with variable pressure supplies.
- the feed pump 42 is connected via a line 64 to the Pressure medium line 23 connected.
- Line 64 contains a valve 63, which corresponds to the structure of the valve 43.
- the tank 39 for the pressure medium be dimensioned much smaller, since a large amount of the Pressure medium is received by the additional cylinder 50.
- there depending on the size ratio of the third work surface A3 to the annular work surface A2 Reduction of drive power can reach up to 50%.
- Another The drive power is reduced by the fact that in 2 the suction side of the feed pump 42 via the Line 64 is connected to the pressure medium line 23, so that the Feed pump 42 is fed with pressure medium of constant pressure P2 and only have to generate the pressure increase from P2 to P1.
- the Working cylinder 10 in its upper section 10 ' Reduced outside diameter and has a stepped transition to the larger outside diameter in the lower section 10 ''.
- the upper reduced section 10 ' is from an auxiliary cylinder 70 surrounded in a sealing manner, on the outside of which the counterweight 57 ' is appropriate.
- the upper end 71 of the additional cylinder 70 is against the upper reduced section 10 'of the working cylinder 10 down thickened and lies on the upper section via a mechanical seal 72 10 'of the working cylinder 10.
- a mechanical seal 74 is provided, which on lower thickened portion 10 '' of the working cylinder 10 abuts.
- a plurality of through holes 76 provided that the pressure chamber 13 of the working cylinder 10 with a Connect pressure chamber 75, the upper end face 77 of which has an annular shape and the inner diameter of the auxiliary cylinder 70 and the reduced one Outside diameter of the cylinder section 10 'is limited.
- the same diameter also limit an annular work surface A3, shown on the right in Fig. 3, the thickened upper end of the Additional cylinder 70 is formed.
- the feed pump 42 is in the bottom plate 20 'of the Working cylinder 10 installed. It is on the suction side Bore 23 and connected with its pressure side to the bore 21. There are one on the suction side and one on the pressure side of the feed pump Valve 43 or 63 provided as a switching or proportional valve trained, arranged to open and close the concerned Management.
- FIG. 4 is compared to that according to FIG. 3 modified in that the working cylinder 110 in two axially sections 110 'and 110' 'which are displaceable relative to one another, the upper portion 110 'having a shape similar to that Additional cylinder 70 in FIG. 3.
- the upper cylinder section 110 'is on its upper end 111 is also thickened and with a Mechanical seal 112 provided. It slides on with this end Reciprocating piston 1.
- the lower end 111 of the cylinder section 110 ' is sealing against the fixed lower section 110 "of the Working cylinder 110 guided, for which purpose the mechanical seal 112 in thickened end 111 of the upper cylinder portion 110 'is provided is.
- a pressure chamber 75 ' included that is delimited at the upper end by the end wall 11 ' that forms the annular work surface A3.
- the counterweight 57' ' is attached on the outside of the upper cylinder section 110 '.
- the feed pump 42 is of the same design and into the Base plate 20 "installed as in the example according to FIG. 3. Accordingly, the mode of operation is the same as that of FIG. 3 described, i.e. the upper one presses when lifting the load Cylinder section 110 'under the influence of the counterweight 57 " Pressure medium with the constant pressure P2 in the pressure chamber 13 of the Working cylinder 110, whereby the reciprocating piston 1 is raised.
- pressure medium passes from the pressure chamber 13 via the Bore 23 to the feed pump 42, which it with the variable pressure P1 in supplies the further pressure chamber 7 of the reciprocating piston 1.
- This pressure medium affects the further work surface A1 and supports the Upward movement of the reciprocating piston.
- the pressure medium with a substantially constant pressure supplies a bladder accumulator or a piston accumulator can be used. Also connected to the pressure rooms 7 and 13 Pressure sources are interchanged, i.e. that the pressure chamber pressure medium with constant pressure and the pressure chamber 13 pressure medium with variable Pressure is supplied.
- the drive described is not only for Lifts can be used; e.g. also for moving up and down Carriage on machine tools, lifting platform for cranes, forklifts, Lifting platforms, active car or truck shock absorbers, etc. are used become.
- one or two can be used as required or more than two spacers 25 and 25 'and 27 may be provided, then with a corresponding mutual distance in the reciprocating piston 1 attached or attached to each other via ropes 26.
- the Counterweight 57 can be attached directly or with ropes to the Additional pistons or additional cylinders attached to the roller must be suspended, which halves the mass of the counterweight.
- the electric motor 41 can be connected to a frequency converter and this to an electronic Control card connected, which then control signals to the Frequency converter and the valves supplies.
- the valves are as Switching or proportional directional valves provided, which also with pulse-modulated signals can be controlled. Drives can only one valve can be installed in the pressure medium line 23 or 24.
- the filters can in the two pressure medium lines 23 and 24, or can only be installed in a pressure medium line 23 or 24.
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Structural Engineering (AREA)
- Actuator (AREA)
- Types And Forms Of Lifts (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Details Of Reciprocating Pumps (AREA)
- Load-Engaging Elements For Cranes (AREA)
Description
- Fig. 1
- einen Längsschnitt durch einen hydrostatischen Antrieb mit zwei Druckräumen, und
- Fig. 2 bis 4
- je einen Längsschnitt durch einen hydrostatischen Antrieb, wobei jeweils die Druckmittelquelle, die Druckmittel mit im wesentlichen konstanten Druck liefert, durch ein Gegengewicht ersetzt ist, das auf eine besondere Kolben-/Zylinderanordnung wirkt.
Claims (5)
- Hydrostatischer Antrieb zum Heben und Senken und zum Halten von Lasten, insbesondere für Aufzüge, mit einem an eine Druckmittelquelle (30) angeschlossenen einen ersten Druckraum (13) bildenden Arbeitszylinder (10), einem im Arbeitszylinder (10) dichtend geführten Hubkolben (1) und einer im Arbeitszylinder (10) angeordneten Führungsstange (15), die in das Innere des Hubkolbens (1) ragt, der die Führungsstange (15) dichtend umfasat, wobei das in den ersten Druckraum (13) ragende Ende des Hubkolbens (1) eine ringförmige, druckmittelbeaufschlagte stirnfläche (5) bildet, und bei dem das Innere des Hubkolbens (1) einen zweiten Druckraum (7) bildet, an dem eine eigene Druckmittelquelle (40) angeschlossen ist wobei eine der Druckmittelquellen Druckmittel mit einem variablen Druck liefert, dadurch gekennzeichnet, dass im Hubkolben (1) mindestens ein an der Führungsstange (15) gleitender Distanzring (27') befestigt ist und dass im Arbeitszylinder (10, 110) mindestens ein an der Führungsstange (15) und am Arbeitszylinder (10, 110) gleitender Distanzring (25) angeordnet ist, der mittels flexibler Zugelemente (26) mit dem Hubkolben (1) verbunden ist.
- Antrieb nach Anspruch 1, mit einem Gegengewicht (57) zum Ausgleichen eines Teils der vom Hubkolben (1) zu hebenden Last, dadurch gekennzeichnet, dass das Gegengewicht (57) an einem zusatzzylinder (70) angeordnet ist, der den Arbeitszylinder (10, 110) unter Bildung eines druckmittelbeaufschlagten Raumes (75) dichtend umgibt, dass dieser Raum (75) mit dem ersten Druckraum (13) des Arbeitszylinders (10) in Verbindung steht und dass zum Bilden des druckmittelbeaufschlagten Raumes (75) der Arbeitszylinder (10) auf seiner Aussenseite im Durchmesser stufenartig verringert ist.
- Antrieb nach Anspruch 1, mit einem Gegengewicht (57) zum Ausgleichen eines Teils der vom Hubkolben (1) zu hebenden Last, dadurch gekennzeichnet, dass der Arbeitszylinder (110) in einen feststehenden Zylinderabschnitt (110'') und einen auf diesem axial beweglichen Zylinderabschnitt (110') unterteilt ist, der am feststehenden zylinderabschnitt (110'') dichtend geführt ist und zwischen sich und dem Hubkolben (L) einen druckmittelbeaufschlagten Raum (75') bildet, und dass das Gegengewicht (57'') am axial beweglichen Zylinderabschnitt (110') angeordnet ist.
- Antrieb nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass eine Pumpe (42) als die einen variablen Druck liefernde Druckemittelquelle vorgesehen ist, welche saugseitig und druckseitig mit Ventilen (43, 63) versehen ist und dass die Pumpe (42) mit den Ventilen (43, 63) im Boden (20', 20") des Arbeitszylinders (10, 110) untergebracht ist.
- Antrieb nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass im Inneren des Hubkolbens (1) von seinem die Last aufnehmenden Ende ausgehend eine Drosselstange (60) vorgesehen ist, die beim Abwärtsbewegen des Hubkolbens (1) in einen Kanal (17) der Führungsstange (15) eindringt.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01004/97A CH689211A5 (de) | 1997-04-30 | 1997-04-30 | Hydrostatischer Antrieb zum Heben und Senken und zum Halten von Lasten, insbesondere fuer Aufzuege. |
CH100497 | 1997-04-30 | ||
PCT/CH1998/000173 WO1998049085A2 (de) | 1997-04-30 | 1998-04-28 | Hydrostatischer antrieb zum heben und senken und zum halten von lasten, insbesondere für aufzüge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0979357A2 EP0979357A2 (de) | 2000-02-16 |
EP0979357B1 true EP0979357B1 (de) | 2003-02-26 |
Family
ID=4200218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98914771A Expired - Lifetime EP0979357B1 (de) | 1997-04-30 | 1998-04-28 | Hydrostatischer antrieb zum heben und senken und zum halten von lasten, insbesondere für aufzüge |
Country Status (13)
Country | Link |
---|---|
US (1) | US6422349B1 (de) |
EP (1) | EP0979357B1 (de) |
JP (1) | JP2001527497A (de) |
CN (1) | CN1096577C (de) |
AT (1) | ATE233374T1 (de) |
AU (1) | AU6916998A (de) |
BR (1) | BR9809430A (de) |
CH (1) | CH689211A5 (de) |
DE (1) | DE59807321D1 (de) |
ES (1) | ES2189153T3 (de) |
PT (1) | PT979357E (de) |
TR (1) | TR199902647T2 (de) |
WO (1) | WO1998049085A2 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE50002755D1 (de) * | 1999-08-25 | 2003-08-07 | Bucher Hydraulics Ag Neuheim | Hydraulischer aufzug mit einem als gegengewicht wirkenden druckspeicher und verfahren zum steuern und regeln eines solchen aufzugs |
GB0329785D0 (en) * | 2003-12-20 | 2004-01-28 | Stannah Lifts Ltd | Improvements in or relating to drive systems |
US7614829B2 (en) * | 2005-02-09 | 2009-11-10 | Thomas Jr Samuel M | Extendible building post |
CA2507149A1 (en) * | 2005-05-12 | 2006-11-12 | P & M Design & Consulting Ltd. | Pneumatic cylinder |
US20060264275A1 (en) * | 2005-05-18 | 2006-11-23 | David Hammeke | Retractable structure for mounting a device |
GB0511908D0 (en) * | 2005-06-11 | 2005-07-20 | Stannah Lifts Ltd | Improvements in or relating to drive systems |
US8640829B2 (en) * | 2008-07-16 | 2014-02-04 | William P. Block, JR. | Hydraulic elevator system |
CN102275593B (zh) * | 2010-06-11 | 2015-03-04 | 北京铁道工程机电技术研究所有限公司 | 一种高速动车组的地坑式架车机 |
CN102374207A (zh) * | 2010-08-17 | 2012-03-14 | 沈传良 | 双蓄能内、外式柱塞油缸 |
US20150210518A1 (en) * | 2014-01-27 | 2015-07-30 | Chung-Yi Yang | Anti-overpressure double-acting threaded jack |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2269786A (en) * | 1941-04-28 | 1942-01-13 | Vickers Inc | Power transmission |
DE1031945B (de) * | 1953-10-26 | 1958-06-12 | Helmut Rudolph | Hydraulisch betaetigte Kraftfahrzeughebebuehne |
CH434927A (it) * | 1965-09-17 | 1967-04-30 | Fiat Spa | Dispositivo idraulico per comandare la traslazione della slitta portante il mandrino operatore di macchine utensili |
US3331292A (en) * | 1966-06-06 | 1967-07-18 | Controlled Mercury Switch Corp | Extensible actuator with improved sealing means |
US3548573A (en) * | 1968-04-17 | 1970-12-22 | Cessna Aircraft Co | Cylinder with integral accumulator |
SE8002428L (sv) * | 1980-03-28 | 1981-09-29 | Mecman Ab | Dempanordning for enkelverkande tryckmediecylindrar |
HU184796B (en) * | 1980-06-26 | 1984-10-29 | Sandor Rajzo | Hydrostatic drive |
JPS58113611A (ja) * | 1981-12-25 | 1983-07-06 | Hitachi Constr Mach Co Ltd | ダブルアクチング形液圧シリンダ |
DE3402853A1 (de) * | 1983-06-23 | 1985-02-14 | BEKE Mgtsz., Fot | Hydrostatischer antrieb, insbesondere fuer aufzuege |
US4955282A (en) * | 1989-03-27 | 1990-09-11 | Ranson Ronald W | Uniform flow hydraulic system |
US5860491A (en) * | 1996-07-18 | 1999-01-19 | Advantage Lift Systems, Inc. | Hydraulic lift system and method for retrofitting |
-
1997
- 1997-04-30 CH CH01004/97A patent/CH689211A5/de not_active IP Right Cessation
-
1998
- 1998-04-28 BR BR9809430-0A patent/BR9809430A/pt not_active IP Right Cessation
- 1998-04-28 DE DE59807321T patent/DE59807321D1/de not_active Expired - Fee Related
- 1998-04-28 WO PCT/CH1998/000173 patent/WO1998049085A2/de active IP Right Grant
- 1998-04-28 AT AT98914771T patent/ATE233374T1/de not_active IP Right Cessation
- 1998-04-28 AU AU69169/98A patent/AU6916998A/en not_active Abandoned
- 1998-04-28 EP EP98914771A patent/EP0979357B1/de not_active Expired - Lifetime
- 1998-04-28 TR TR1999/02647T patent/TR199902647T2/xx unknown
- 1998-04-28 JP JP54645198A patent/JP2001527497A/ja not_active Ceased
- 1998-04-28 CN CN98804673A patent/CN1096577C/zh not_active Expired - Fee Related
- 1998-04-28 ES ES98914771T patent/ES2189153T3/es not_active Expired - Lifetime
- 1998-04-28 PT PT98914771T patent/PT979357E/pt unknown
-
1999
- 1999-10-29 US US09/432,059 patent/US6422349B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US6422349B1 (en) | 2002-07-23 |
WO1998049085A3 (de) | 1999-02-11 |
CH689211A5 (de) | 1998-12-15 |
EP0979357A2 (de) | 2000-02-16 |
JP2001527497A (ja) | 2001-12-25 |
TR199902647T2 (xx) | 2000-03-21 |
PT979357E (pt) | 2003-07-31 |
CN1096577C (zh) | 2002-12-18 |
ES2189153T3 (es) | 2003-07-01 |
WO1998049085A2 (de) | 1998-11-05 |
AU6916998A (en) | 1998-11-24 |
BR9809430A (pt) | 2000-11-14 |
ATE233374T1 (de) | 2003-03-15 |
CN1255959A (zh) | 2000-06-07 |
DE59807321D1 (de) | 2003-04-03 |
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