EP0670968B1 - Einstelleinrichtung für druckflüssigkeitssystem - Google Patents

Einstelleinrichtung für druckflüssigkeitssystem Download PDF

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Publication number
EP0670968B1
EP0670968B1 EP92904126A EP92904126A EP0670968B1 EP 0670968 B1 EP0670968 B1 EP 0670968B1 EP 92904126 A EP92904126 A EP 92904126A EP 92904126 A EP92904126 A EP 92904126A EP 0670968 B1 EP0670968 B1 EP 0670968B1
Authority
EP
European Patent Office
Prior art keywords
indicator
caracterized
set screw
setting device
setting
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
Application number
EP92904126A
Other languages
English (en)
French (fr)
Other versions
EP0670968A1 (de
Inventor
Staffan Hedlund
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rexroth Mecman AB
Original Assignee
Rexroth Mecman AB
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 Rexroth Mecman AB filed Critical Rexroth Mecman AB
Publication of EP0670968A1 publication Critical patent/EP0670968A1/de
Application granted granted Critical
Publication of EP0670968B1 publication Critical patent/EP0670968B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
    • F15B15/223—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having a piston with a piston extension or piston recess which completely seals the main fluid outlet as the piston approaches its end position

Definitions

  • the present invention concerns a means for setting a piston movement parameter in a piston cylinder aggregate, which comprises a setting device being affected by a set screw for fluid flow regulation.
  • a device comprising the features at set forth in claim 1.
  • a setting device essentially comprising an indicator member, which is readable against at least one reading mark, one of these members being placed onto the thereto adapted setting device, the two members are relatively adjustable to one another to achieve a distinct initial or zero position for the adjustment and thereafter fixable, possibility of very accurate direct adjustment of a piston movement parameter in a piston cylinder aggregate is achieved, and the effect of the manufacturing tolerance minimized.
  • a considerable advantage with the invention is that simple replaceability with maintained parameter values is allowed. If e.g. one of a number of cylinders of a machine brakes down, it is simply replaced with an equal cylinder, the setting means of which is set on the same value as that of the setting means of the broken down cylinder. Hereby very short replacement times with minimized adjustment is achieved. Any smaller deviations due to tolerances are quickly adjusted.
  • Fig. 1 is a central section through a part of a piston cylinder aggregate with an indicating device according to the invention.
  • Fig. 2a-2c is an exploded perspective view of the setting device of Fig. 1 with the associated indicator member.
  • Fig. 3 shows a first embodiment of the invention in a cylinder end plate.
  • Fig. 4 shows a second embodiment of the invention in a cylinder end plate.
  • Fig. 1 thus shows an indicator device according to the invention in connection with a cylinder end plate 7.
  • An indicator member comprising an indicator ring 2 is placed onto the outer part of a set screw 1.
  • the indicator ring 2 On its outward surface (not shown) which is directed away from the cylinder end plate, the indicator ring 2 is provided with indicator markings e.g. in form of numerals (2.1 - 2.5, in Fig. 2a), which are readable against a reading mark in the form of a preferably fixed index (6 in Fig. 3), e.g. on the cylinder end plate surface, thereby indicating the rotational position of the set screw.
  • a stepped reading ramp 5 is placed onto the cylinder end plate surface radially immediately outside the indicator ring 2. The hight of the steps corresponds to the pitch of the set screw, whereby an indication of the rotational, position of the set screw for an optional number of turns may be obtained by sighting or sensing with a finger.
  • Fig. 1 The piston cylinder aggregate snown in Fig. 1 is a pneumatic cylinder with speed regulation and stroke end cushioning.
  • This device which corresponds to the preamble of claim 1 is the subject of the applicant's own application SE-A-467424.
  • the set screw 1 affects a valve body 12, which cooperates with two throttle openings 13, 14 of which the one 13 is arranged in a particular stroke end cushioning channel 21 and the other 14 in the outlet channel 22.
  • Fig. 2a - 2c show the indicator ring 2 in connection with the setting device in an exploaded perspective view, from which it is clear that the throttle openings 13, 14 are essentially rectangular. With this shape a linear relation is obtained between the piston speed and the axial displacement of the valve body 12 and thus the rotational displacement of the set screw 1.
  • Adjustment for achieving a distinct initial position, here zero position is obtained as follows:
  • the set screw 1 is screwed into its sleeve 9, until the valve body 12 contacts a stop collar 17, being fixed in the lower part of the sleeve 9.
  • the flow through the throttle openings is now completely closed, and the speed of the piston 11 is zero.
  • the indicator ring 2 is now placed onto the outer part of the set screw, while assuring that the numeral zero appears right in front of the reading index.
  • the indicator ring 2 is fixed, e.g. by tightening a locking screw in a threaded hole adapted for that purpose, in a per se known manner, or by letting an applied glue harden.
  • Fig. 3 shows a device similar to the one in Fig. 1 whith an indicator member which also in this case comprises an indicator ring 2 being fixed onto the outer part of a set screw 1, in connection with a cylinder end plate 7, in which a valve body 12 being fixedly connected to the set screw 1 is indicated with dashed lines.
  • the indicator ring 2 On its outward surface the indicator ring 2 is provided with indicator numerals (2.1 - 2.5 in Fig. 2a) from 0 to 4. These numerals here correspond to the speeds 0; 0.1; 0.2; 0.3; 0.4; m/s.
  • the relation between the piston speed and the displacement of a setting device is obtained by simple testing of suitable throttle opening areas. When the relation is linear as above, the indicator numerals are evenly rotationally distributed on the indicator ring.
  • the lines 2.1 - 2.5 are read against the index from the side as well as straight from above.
  • the scale has been completed with a stepped reading ramp 5, which in this case comprises three steps with grades 0.5; 1.0; 1.5 m/s. This value is added to the value of the ring to obtain a true indication of the speed.
  • Fig. 4 shows a second embodiment of the invention in connection with a cylinder end plate 7.
  • the indicator member comprises an indicator ring 2 with indicator numerals from 0 - 4 on its outward surface, which are read against an index in the same manner as has been described above.
  • the indicator ring 2 is further provided with a desired number of annular grooves or similar markings 16 distributed over its axial length, mutually spaced apart a distance corresponding to the pitch of the set screw.
  • the indicator ring 2 In the initial position, when the speed of the piston is zero, the setting device is screwed into its inner position, the indicator ring 2 at least with its main part being located within a cylindric recess 15 in the cylinder end plate.
  • the indicator ring 2 When the set screw 1 is then screwed out to partly open the throttle openings of the setting device, the indicator ring 2 will also be displaced axially outwards, whereby the annular grooves 16 or the like markings, will appear in correspondence to one, two or more screw turns out of the recess 15. Reading is simply achieved by sighting against an index applied beside the ring or along the wall of the cylinder end plate or the valve housing.
  • the adjustment to obtain a distinct initial position may, if desired, be simply completed with axial adjustment in connection with the rotational adjustment.
  • the setting device may thus be used in other kinds of piston cylinder aggregates than the shown and does not need to be contained in a cylinder end plate. Nor does the setting device need to comprise a valve body of the kind described in connection with the figures. Also other valve designs may come into question, e.g. needle valves.
  • the indicator member does not necessarily have to be comprised of an indicator ring with outward indicator markings but may e.g. be comprised of a pointer cooperating with reading marks in the form of a fixed scale. This may be suitable particularly if the valve is a so called tap valve.
  • the indicator member 2 may be manufactured from a suitable material, e.g. a synthetic material or metal and may be fixed to the set screw in a suitable manner, e.g. by a locking screw radially or axially, by glueing, soldering, stamping, shrinking, jolting or in any other way.
  • the reading mark(s) may be integral with the reading ramp, which further does not have to bee stepped but may run continuously and possibly with a reading scale applied close to the indicator member.
  • the indicator member may be integral with the set screw, the adjustment being achieved by applying/displacing the reading index for calibration against "the zero" of the indicator member.
  • the indicator member may be comprised of a point, a line or the like on the set screw and the reading marks of a scale which is in principle shaped as the indicator ring in Fig. 4a and which is adjustable and then fixable close to the setting device.
  • the reading index may be applied onto the valve housing or the cylinder end plate by casting, punching, painting, stamping or by applying a body by glueing, screwing, soldering or in any other way. In case the reading index as well as the stepped reading ramp are fixed, these members may be made integral with the cylinder end plate/valve housing.
  • Both of the members may also be adjusted simultaneously, e.g. one axially and the other rotationally.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Coating Apparatus (AREA)
  • Actuator (AREA)

Claims (9)

  1. Vorrichtung zum Einstellen eines Bewegungsparameters für einen Kolben (11) in einer Kolben-Zylinder-Gruppe mit einer Einstelleinrichtung zur Fluidflußregulierung, die durch eine Einstellschraube (1) betätigt wird, wobei die Einstelleinrichtung zwei Elemente aufweist, nämlich wenigstens eine Ablesemarke (6) und einen Anzeigekörper (2), der gegen die Ablesemarke oder die Marken (6) lesbar ist, wobei eines der Elemente an der Einstelleinrichtung angebracht und damit beweglich ist und das andere Element nahe bei der Einstelleinrichtung stationär angeordnet ist, dadurch gekennzeichnet, daß die zwei Elemente unabhängig von der Position der Einstelleinrichtung derart zueinander verstellbar sind, daß eine genaue Ausgangsposition für die Einstellung erhalten wird, die nach der Verstellung fixierbar ist.
  2. Vorrichtung nach Anspruch 1, bei der die Einstellschraube (1) mit wenigstens einem Ventilkörper (12) verbunden ist, der im Zusammenwirken mit wenigstens einer Drosselöffnung (13, 14) das Ausströmen von Druckfluid aus der Kolben-Zylinder-Gruppe drosselt, dadurch gekennzeichnet, daß die Drosselöffnung oder die Öffnungen (13, 14) im wesentlichen rechteckig sind, um eine im wesentlichen lineare Beziehung zwischen der Verschiebung des Ventilkörpers (12) und der Geschwindigkeit des Kolbens (11) zu erhalten.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Anzeigeelement (2) aus einem Anzeigering mit Anzeigemarkierungen besteht und die Ablesemarke aus einem Index (6) besteht.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Anzeigemarkierungen an der Außenfläche des Anzeigerings (2) angebracht sind und aus in Drehrichtung verteilten Anzeigeziffern (2.1-2.5) bestehen.
  5. Vorrichtung nach einem der Ansprüche 1 - 4, dadurch gekennzeichnet, daß die Ablesemarke aus einer abgestuften Ableserampe besteht, die radial unmittelbar außerhalb des Anzeigeelements (2) angeordnet ist, wobei die Schritthöhe der Ganghöhe der Einstellschraube (1) entspricht und die axiale Verschiebug der Einstellschraube gegen die Ableserampe lesbar ist.
  6. Vorrichtung nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß der Anzeigering (2) Nuten oder Markierungen (16)) um seine einhüllende Fläche aufeist, wobei der Abstand zwischen zwei nebeneinanderliegenden Nuten oder Markierungen (16) der Ganghöhe der Einstellschraube (1) entspricht und die axiale Verschiebung der Einstellschraube durch die Nuten oder Markierungen (16) angegeben ist, die gegen einen neben dem Ring (2) oder einer Wand der Zylinderendplatte (7) oder des Ventilgehäuses angebrachten Index zu lesen sind.
  7. Vorrichtung nach einem der Ansprüche 1-6,
    dadurch gekennzeichnet, daß das Anzeigeelement (2) in Drehrichtung und/oder axial verstellbar und danach an der Einstelleinrichtung fixierbar ist.
  8. Vorrichtung nach einem der Ansprüche 1-7,
    dadurch gekennzeichnet, daß die Ablesemarke(n) (6) in Drehrichtung und/cder axial verstellbar und danach nahe an der Einstelleinrichtung fixierbar ist/sind.
  9. Vorrichtung nach einem der Ansprüche 1-8,
    dadurch gekennzeichnet, daß die Befestigung nach dem Verstellen durch Kleben, Verschrauben, Löten, Stauchen, Kaltschlagen, Schrumpfen oder auf jede andere geeignete Weise erreicht wird.
EP92904126A 1991-02-20 1991-12-20 Einstelleinrichtung für druckflüssigkeitssystem Expired - Lifetime EP0670968B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9100511A SE468176B (sv) 1991-02-20 1991-02-20 Anordning foer instaellning vid tryckmedieanordningar
SE9100511 1991-02-20
PCT/SE1991/000898 WO1992014934A1 (en) 1991-02-20 1991-12-20 Adjusting means for fluid pressure devices

Publications (2)

Publication Number Publication Date
EP0670968A1 EP0670968A1 (de) 1995-09-13
EP0670968B1 true EP0670968B1 (de) 1998-06-10

Family

ID=20381952

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92904126A Expired - Lifetime EP0670968B1 (de) 1991-02-20 1991-12-20 Einstelleinrichtung für druckflüssigkeitssystem

Country Status (5)

Country Link
EP (1) EP0670968B1 (de)
AU (1) AU9174491A (de)
DE (1) DE69129599T2 (de)
SE (1) SE468176B (de)
WO (1) WO1992014934A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19928748A1 (de) * 1999-03-26 2000-09-28 Continental Teves Ag & Co Ohg Elektromagnetventil, insbesondere für hydraulische Bremsanlagen mit Schlupfregelung
DE202004011993U1 (de) * 2004-07-30 2005-12-08 Liebherr-Werk Nenzing Ges.M.B.H. Kolben-/Zylindereinheit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US604253A (en) * 1898-05-17 Engine-controlling device
DE1054845B (de) * 1954-09-10 1959-04-09 Christoph Willi Gehring Vorrichtung zur hydraulischen Programmsteuerung
US3122063A (en) * 1962-02-26 1964-02-25 Arrow Tools Inc Cylinder with improved sealing and governor means
US3442178A (en) * 1967-08-21 1969-05-06 Herbert H Peters Hydraulically actuated stop for a hydraulic ram unit
US3559535A (en) * 1969-01-21 1971-02-02 Patrick W Conolly Hydraulic cylinder with cushioned stroke

Also Published As

Publication number Publication date
DE69129599D1 (de) 1998-07-16
SE9100511L (sv) 1992-08-21
SE468176B (sv) 1992-11-16
SE9100511D0 (sv) 1991-02-20
AU9174491A (en) 1992-09-15
EP0670968A1 (de) 1995-09-13
WO1992014934A1 (en) 1992-09-03
DE69129599T2 (de) 1998-11-26

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