EP0624229A1 - Appareil de mesure permettant d'observer le reglage du volume de deplacement de machines a pistons axiaux. - Google Patents

Appareil de mesure permettant d'observer le reglage du volume de deplacement de machines a pistons axiaux.

Info

Publication number
EP0624229A1
EP0624229A1 EP93923489A EP93923489A EP0624229A1 EP 0624229 A1 EP0624229 A1 EP 0624229A1 EP 93923489 A EP93923489 A EP 93923489A EP 93923489 A EP93923489 A EP 93923489A EP 0624229 A1 EP0624229 A1 EP 0624229A1
Authority
EP
European Patent Office
Prior art keywords
measuring device
contact surface
measuring
rotation
sensor
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.)
Granted
Application number
EP93923489A
Other languages
German (de)
English (en)
Other versions
EP0624229B1 (fr
Inventor
Walter Radtke
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.)
Brueninghaus Hydromatik GmbH
Original Assignee
Hydromatik GmbH
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 Hydromatik GmbH filed Critical Hydromatik GmbH
Publication of EP0624229A1 publication Critical patent/EP0624229A1/fr
Application granted granted Critical
Publication of EP0624229B1 publication Critical patent/EP0624229B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/10—Control of working-fluid admission or discharge peculiar thereto
    • F01B3/103—Control of working-fluid admission or discharge peculiar thereto for machines with rotary cylinder block
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/26—Control
    • F04B1/30—Control of machines or pumps with rotary cylinder blocks
    • F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
    • F04B1/324—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/26—Control
    • F04B1/30—Control of machines or pumps with rotary cylinder blocks
    • F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
    • F04B1/328—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the axis of the cylinder barrel relative to the swash plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2201/00—Pump parameters
    • F04B2201/12—Parameters of driving or driven means
    • F04B2201/1205—Position of a non-rotating inclined plate

Definitions

  • the invention relates to a measuring device for detecting the displacement volume setting of axial piston machines according to the preamble of patent claim 1.
  • these sensors on both sides of the preferably in the contact surface che extending axis of rotation may be arranged so that, for example, switches with the same or different switching paths can be operated when adjusting reversible axial piston machines in one or the other conveying direction.
  • Each sensor preferably has a measuring surface which, like that
  • Contact surface is flat and is each provided with two boundary edges. If the distance of the contact surface boundary edges from the
  • one of the first-mentioned boundary edges slides along the measuring surface as the contact point of the contact surface when the latter rotates.
  • one of these boundary edges represents the measuring surface contact point, which slides along the contact surface when the same rotates.
  • the measuring surface of the sensor can also be at least cylindrical with a normal sectional plane perpendicular to the axis of rotation or spherical, so that both the measuring surface and the contact surface slide along one another when the latter rotates and their contact points thus take up constantly changing distances from the axis of rotation.
  • At least one sensor is slidably guided in a guide bush, which can itself be designed as a sensor.
  • the contact surface is preferably formed on a rotatable shaft of an adjusting device for adjusting the actuator connected to the pivotable component of the axial piston machine.
  • the contact surface can be the groove base of a groove cut into the shaft.
  • FIG. 1 shows a measuring device according to a first embodiment of the
  • Figure 2 shows a measuring device according to a second embodiment of the
  • Figure 3 shows a measuring device according to a third embodiment of the
  • Figure 4 shows a measuring device according to a fourth embodiment of the
  • the measuring device shown in Figure 1 is in an adjusting device for
  • the axial piston machine conventionally comprises a cylinder drum which is rotatably mounted in a Collector and a swash plate or swash plate which is generally referred to here as a swash plate.
  • a swash plate which is generally referred to here as a swash plate.
  • either the cylinder drum or the swash plate is pivotally mounted for changing the displacement volume setting of the axial piston machine and is coupled to the actuator 1.
  • the adjusting device comprises a shaft 2, which is rotatably mounted in a bearing bore 3 of a housing 4 about its longitudinal central axis A and is coupled on the one hand to a hand lever (not shown) and on the other hand to an adjusting lever 5, which is connected to the actuator 1 via an eccentric 6 at its free end is engaged.
  • the hand lever serves to rotate the shaft 2 in mutually opposite directions until an end position is reached, which corresponds to an end position of the actuator 1 corresponding to the respective maximum displacement volume setting of the axial piston machine.
  • the adjusting device further comprises a reset arrangement for resetting len of the shaft 2 rotated towards the end position and for holding it in a zero position.
  • a reset arrangement for resetting len of the shaft 2 rotated towards the end position and for holding it in a zero position.
  • one of the end positions is indicated with solid lines and the zero position with dashed lines.
  • the return arrangement comprises a return element 7 with a flat end face 8, a flat counter surface 9 formed on the shaft 2, a return spring 10 and a closure part 11, which is designed as a screw consisting of a head section 12 and a bolt section 13.
  • the restoring element 7 is arranged in a housing 15 formed in the housing 4, from an end face 14 of the same to the bearing bore 3 perpendicular to this bore 15.
  • This bore 15 is formed with a radially extending step 16 and has a rectangular cross section in the area between this step and the bearing bore 3 and a circular cross section in the remaining area.
  • the reset element 7 is formed on both sides of a radial step 17 with a rectangular cross section extending up to the end face 8 and a circular cross section.
  • the closure part 11 is screwed with its bolt section 13 into the bore 15 until its head section 12 bears against the housing end face 14 and accordingly limits the stroke of the restoring element 7.
  • the restoring spring 10 is arranged in a blind bore 18 of the restoring element 7 and is pretensioned on the bolt section 13 of the closure part 11, so that it acts on the restoring element 7 in the direction of the counter surface 9 formed on the shaft 2.
  • This counter surface 9 is the groove base of a rectangular groove cut into the shaft 2 transversely to this and having parallel groove walls (not shown), into which the restoring element 7 engages with its rectangular cross section.
  • the groove is open on both sides and its depth corresponds to the radius of the shaft 2, so that the radial dimension of the groove base 9 measured transversely to this is equal to the diameter 2r of the shaft 2.
  • the longitudinal central axis L of the bore 15 lies in a the longitudinal central axis A of the shaft 2 containing level E.
  • the measuring device comprises a bearing surface which is identical to the counter surface 9 of the shaft 2 and is accordingly also designated by the reference number 9, and a measuring sensor 19 with a flat measuring surface 20 which corresponds in the form of a pin with a rectangular cross section in a central through bore Cross section in the restoring element 7 and in the closure part 11 is arranged displaceably and engages in the groove.
  • the end face of the sensor 19 facing the shaft 2 is identical to the measuring face 20.
  • the sensor 19 rests with its opposite end face against an actuating element (not shown) which is biased in the direction of the shaft 2 by means of a return spring (not shown) and which is screwed into the closure part 11 and is in this way constantly in the direction of the counter or contact surface 9 acted upon.
  • the measuring surface 20 of the sensor 19 comprises two measuring surface regions 20a, 20b of the same size on both sides of the plane E intersecting them vertically, each of which has an axial, i.e. Limiting edge 22, 23 running parallel to the longitudinal central axis A of the shaft 2 are limited at a distance x from the plane E.
  • the end face 8 of the restoring element 7 comprises two end face regions 8a, 8b of the same size, which are arranged radially outside the measuring surface 20 and extend from this up to an axially extending boundary edge 24, 25 at a distance y from the plane E.
  • the contact surface 9 comprises two contact surface regions 9a, 9b of the same size arranged on both sides of the plane E, each of which is delimited by an axially extending boundary edge 26, 27 with the distance r from the longitudinal central axis A.
  • the distances x, y and r are measured in the plane of the respective surface 20, 8 and 9, respectively.
  • the distance r is equal to the distance y.
  • Figure 2 shows a schematic representation of the same arrangement as Figure 1, but with the difference that the reset element 7 is connected to a dial gauge 28 for measuring its stroke or measuring path and thus simultaneously serves as a second sensor, also designated by the reference numeral 7.
  • the sensor 19 is not provided here for actuating the safety switch 21, but also with a dial gauge 29 for measuring its measuring path connected and acted upon by a return spring, not shown, of the dial gauge 29 in the direction of the contact surface 9.
  • the shaft 2 is in a rotational position corresponding to the zero position relative to the housing 4, which corresponds to a zero position of the actuator 1 corresponding to the zero displacement volume of the axial piston machine.
  • the correspondence is established by adjusting the adjustment lever 5 and thus the eccentric 6 accordingly (see FIG. 1).
  • both the sensor 7 serving as the restoring element and the sensor 19 are in their respective zero position, in which they bear completely against the contact surface 9 of the shaft 2 with their measuring surfaces 8, 20 under the force of the respective restoring spring; the distance r between the edges 26,27 is equal to the distance y between the edges 24,25.
  • the arrangement of the contact surface 9 of the shaft 2 and the measuring surface 8 of the resetting sensor 7 on both sides of the two surfaces 8.9 perpendicularly intersecting plane E works together with the return spring 10 ei ne mutual fixation of the shaft 2 and the two sensors 7th , 19 in the zero position or zero position.
  • the shaft 2 serves on the one hand as a stop for the sensors 7, 19 and thus prevents them from being displaced by the respective return spring beyond the zero position, and on the other hand is mainly due to the sensor 7 fixed in this way with the biasing force of the return spring 10 set in their zero position.
  • the safety switch 21 is in the non-actuated state.
  • both dial indicators 28, 29 are set to zero.
  • the shaft 2 is rotated by means of the hand lever from its zero position by a corresponding angle ⁇ in the corresponding direction (clockwise in the present exemplary embodiment) and thus a pivoting movement of the adjusting lever 5 caused by a corresponding pivot angle.
  • This pivoting movement is caused by the eccentric 6 transmit the actuator 1, which in turn causes the axial piston machine to swing out to a corresponding displacement volume.
  • the shaft 2 remains out of its zero position with only one of the two boundary edges 26, 27 (the upper boundary edge 26 in the drawing) as the contact point of the contact surface 9 in contact with the associated (in the drawing upper) measuring surface area 8a of the resetting sensor 7 and moves this against the force of the return spring 10 with the measuring path indicated by the dial gauge 28
  • the sensor 19 switches the safety switch 21 to a position in which the latter prevents the start of the axial piston machine.
  • n x-x cosoc.
  • the respective other measuring surface boundary edge 23 or 22 moves away from the contact surface 9 during the rotation of the shaft 2.
  • the measuring device according to FIG. 3 differs from that according to FIG. 2 in that instead of the sensor 19 two sensors 30, 31 are used, which are arranged on both sides symmetrically to the plane E in the resetting sensor 7, each having a spherical measuring surface 32, 33, which is in point contact with the contact surface 9 at the respective contact point 34, 35, and is connected to a dial gauge 36, 37.
  • the function of this measuring device corresponds analogously to that of the measuring device according to FIG. 2.
  • the measuring device according to FIG. 4 is equipped with only one, namely the resetting sensor 7 according to FIG. Its function results from the functional description above.
  • the measuring surface areas of the individual sensors can have different radial dimensions, so that they or their boundary edges determining the measuring path of the sensor are arranged at different distances from the plane E.
  • the same purpose is achieved with a sensor whose measuring surface is graduated so that the e.g. Measuring surface areas arranged on both sides of plane E have different distances from a plane perpendicular to plane E.
  • the step separating the two measuring surface areas can also be arranged to the side of plane E, i.e. one of the two measuring surface areas is arranged on both sides and the other measuring surface area is arranged only on one side of plane E.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

La présente invention concerne un appareil de mesure permettant de déterminer le réglage du volume de déplacement de machines à pistons axiaux de tout type, dont le volume de déplacement peut être réglé à des valeurs différentes par un organe de réglage déplaçable. A cet effet, l'appareil comprend une surface de contact couplée avec l'organe de réglage de façon à se déplacer avec lui, et un ensemble de détection comportant au moins un palpeur pour détecter les variations de la position de la surface de contact, le palpeur et la surface de contact étant chacun en contact mutuel avec un point de contact. Pour observer avec cet appareil de mesure également des fonctions ayant des courses différentes, l'invention propose que, pour le déplacement commun avec l'organe de réglage (1), l'orientation de la surface de contact (9) puisse tourner autour d'un axe de rotation (A) disposé à une certaine distance (x, r) du point de contact (22, 23; 26, 27; 34, 35). L'angle de rotation (alpha) de la surface de contact (9) ainsi que la distance (x, r) déterminent le déplacement de mesure (a, b) du palpeur (7; 19; 30, 31), lequel déplacement est proportionnel à la valeur du réglage correspondant de l'organe de réglage (1).
EP93923489A 1992-11-20 1993-10-18 Appareil de mesure permettant d'observer le reglage du volume de deplacement de machines a pistons axiaux Expired - Lifetime EP0624229B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4239145A DE4239145C1 (de) 1992-11-20 1992-11-20 Meßeinrichtung zum Erfassen der Verdrängungsvolumen-Einstellung von Axialkolbenmaschinen
DE4239145 1992-11-20
PCT/EP1993/002871 WO1994012790A1 (fr) 1992-11-20 1993-10-18 Appareil de mesure permettant d'observer le reglage du volume de deplacement de machines a pistons axiaux

Publications (2)

Publication Number Publication Date
EP0624229A1 true EP0624229A1 (fr) 1994-11-17
EP0624229B1 EP0624229B1 (fr) 1997-01-02

Family

ID=6473321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93923489A Expired - Lifetime EP0624229B1 (fr) 1992-11-20 1993-10-18 Appareil de mesure permettant d'observer le reglage du volume de deplacement de machines a pistons axiaux

Country Status (3)

Country Link
EP (1) EP0624229B1 (fr)
DE (2) DE4239145C1 (fr)
WO (1) WO1994012790A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102405350A (zh) * 2009-04-21 2012-04-04 罗伯特·博世有限公司 用于探测调整的活塞排量的装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9408860U1 (de) * 1994-05-31 1994-07-21 Schaeffler Waelzlager Kg Axialkolbenmaschine
DE10119236C1 (de) * 2001-04-19 2002-12-12 Brueninghaus Hydromatik Gmbh Axialkolbenmaschine in Schrägachsen-Bauweise, mit einem Schwenkwinkel-Sensor
DE10119239C1 (de) * 2001-04-19 2002-12-12 Brueninghaus Hydromatik Gmbh Axialkolbenmaschine in Schrägachsen-Bauweise mit einem Schwenkwinkel-Sensor
DE102016226039B3 (de) * 2016-12-22 2018-02-08 Danfoss Power Solutions Gmbh & Co. Ohg Verdrängungssteueranordnung für eine axialkolbenpumpe

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1943356A1 (de) * 1969-08-26 1971-03-18 Rauch Fa Constantin Einrichtung zur Regelung verstellbarer Axialkolbenpumpen
US4494911A (en) * 1983-04-29 1985-01-22 General Signal Corporation Piston pump servo control
US4801247A (en) * 1985-09-02 1989-01-31 Yuken Kogyo Kabushiki Kaisha Variable displacement piston pump
US5073091A (en) * 1989-09-25 1991-12-17 Vickers, Incorporated Power transmission
DE4022301C1 (fr) * 1990-07-13 1991-10-24 Brueninghaus Hydraulik Gmbh, 7240 Horb, De
US5123815A (en) * 1991-02-25 1992-06-23 Parker Hannifin Corporation Fluid pumping apparatus with load limiting control

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9412790A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102405350A (zh) * 2009-04-21 2012-04-04 罗伯特·博世有限公司 用于探测调整的活塞排量的装置
CN102405350B (zh) * 2009-04-21 2014-10-15 罗伯特·博世有限公司 用于探测调整的活塞排量的装置

Also Published As

Publication number Publication date
WO1994012790A1 (fr) 1994-06-09
DE59304989D1 (de) 1997-02-13
DE4239145C1 (de) 1994-03-17
EP0624229B1 (fr) 1997-01-02

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