EP0465796B1 - Axialkolbenmaschine in Schrägachsen-Bauweise - Google Patents

Axialkolbenmaschine in Schrägachsen-Bauweise Download PDF

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Publication number
EP0465796B1
EP0465796B1 EP91107709A EP91107709A EP0465796B1 EP 0465796 B1 EP0465796 B1 EP 0465796B1 EP 91107709 A EP91107709 A EP 91107709A EP 91107709 A EP91107709 A EP 91107709A EP 0465796 B1 EP0465796 B1 EP 0465796B1
Authority
EP
European Patent Office
Prior art keywords
axial piston
piston machine
control member
machine according
inclined plane
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
EP91107709A
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German (de)
English (en)
French (fr)
Other versions
EP0465796A1 (de
Inventor
Edmund Bernhard
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 Hydraulik GmbH
Original Assignee
Brueninghaus Hydraulik 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 Brueninghaus Hydraulik GmbH filed Critical Brueninghaus Hydraulik GmbH
Publication of EP0465796A1 publication Critical patent/EP0465796A1/de
Application granted granted Critical
Publication of EP0465796B1 publication Critical patent/EP0465796B1/de
Anticipated expiration legal-status Critical
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Classifications

    • 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

Definitions

  • the invention relates to an axial piston machine with an inclined axis design according to the features of the preamble of patent claim 1.
  • the pivoting position of the cylinder drum is detected directly on the component immediately adjacent to it, namely the control body, on which it is mounted via a center pin or self-centering with the aid of a spherical control surface. All play except the relevant radial play between the cylinder drum and the center pin or control mirror is switched off. Any inaccuracies that may still occur due to this radial play are negligibly small, so that a further reduction in the inaccuracy by means of a scanning device that engages directly on the cylinder drum is not necessary and would also have to be bought with a design effort that exceeds the very simple construction of the scanning device according to the invention.
  • the inclined surface arrangement flat or with a curved course.
  • it can consist of a single inclined surface or, as in the case of an axial piston machine with two flow directions, can be composed of two inclined surfaces, each of which has an opposite inclination, each assigned to one of the directions of rotation.
  • either the cylindrical bottom surface of the control body assigned to the support surface of the support and swivel bearing or at least one of the flat side surfaces of the control body assigned to the guide surfaces of the support and swivel bearing can be selected.
  • the side surface that is pressed against one of the two guide surfaces during operation of an appropriately designed axial piston machine with only one flow direction can be selected.
  • an axial piston machine with two Current directions can be sufficient, taking into account the bearing play between the side surfaces of the control body and the guide surfaces of the support and pivot bearing.
  • an inclined surface arrangement with an associated measuring sensor can also be formed on each side surface of the control body.
  • the inclined surface arrangement is preferably partially or completely formed on a shoulder of the control body.
  • an inclined surface arrangement can be chosen that runs along a circular arc in the projection, the radius of which is essentially equal to that of the cylindrical support surface.
  • the senor is designed as a sensor pin which is axially guided in a through hole in the housing.
  • the sensor pin can be held in contact with the inclined surface arrangement by a spring.
  • the guide pin is inclined at an angle of substantially 90 ° plus the angle of inclination of the inclined surface arrangement on the same.
  • the senor is designed as an inductive displacement sensor.
  • the axial piston machine is designed in an inclined-axis design and comprises, in a known manner, a housing 1 with a lower end plate 2, a drive shaft 4 rotatably mounted in the upper housing area via a ball bearing 3, a drive pulley 5 connected to it in one piece, and a cylinder drum 6 which can be pivoted relative to the latter ,
  • a distributor or control body 7, which is pivotally supported in a support and pivot bearing formed in the end plate 2, an actuating device for pivoting the control body 7 and a scanning device for directly detecting the respective pivot position of the cylinder drum 6.
  • the latter is on the control body 7 in known rotatably mounted.
  • both the lower end face 8 of the cylinder drum 6 and the (upper) control surface 9 of the control body 7 are spherical with a concave or convex shape.
  • axially extending and evenly distributed over the circumference cylindrical spaces 10 are formed, which open out via cylinder channels 11 on the lower end face 8 of the cylinder drum 6.
  • Pistons 12, which are displaceably guided in the cylinder chambers 10, are connected to the drive pulley 5 by means of piston rods 13 such that they can be rotatably driven via ball joints 14 mounted in the latter.
  • a compression spring 16 is seated, which is supported against a center pin 18, which is supported by a ball 17 in the drive pulley 5 and projects into the blind bore 15, and in this way the cylinder drum 6 when no oil pressure forces occur Holds on the control body 7. From the blind bore 15 an oil channel 19 opens out in the lower end face 8 of the cylinder drum 6.
  • two opposing control kidneys 20 are formed in a known manner, which are connected to a pressure port and a suction port (both not shown) of the axial piston machine.
  • the support and pivot bearing comprises two flat and parallel guide surfaces 21 and a limited by them, with a concave cylindrical support surface 22.
  • the guide surfaces 21 and the support surface 22 are flat and parallel side surfaces 23 or a convex cylindrical bottom surface 24 assigned to the control body 7.
  • the actuating device comprises an actuating rod 25 which is slidably mounted in a bore 26 in the end plate 2 which extends in the direction of curvature of the support surface 21 and the bottom surface 24.
  • the adjustment rod 25 is displaced by an adjustment mechanism outside the axial piston machine.
  • An adjusting pin 28 engaging from below in a bore 27 in the control body 7 is coupled to the adjusting rod 25.
  • Such an actuator is described for example in DE-PS 23 13 575.
  • the drive shaft 4 When operating the axial piston machine as a pump, the drive shaft 4 is driven so that it is rotated via the drive disk 5, the piston rods 13 and the piston 12, the cylinder drum 6. If by pressing the Adjustment mechanism via the adjusting device 25, 28 of the control body 7 has been pivoted with the entrainment of the cylinder drum 6 in such a way that the latter assumes an inclined position relative to the drive pulley 5, so all the pistons mounted in the cylinder drum 6 carry out 12 stroke movements; upon rotation of the cylinder drum 6 through 360 °, each piston 12 passes through a suction and a compression stroke, with corresponding partial oil flows being generated, the supply and discharge of which take place via the cylinder channels 11, the control kidneys 20 and the pressure and suction ports.
  • the reverse process occurs when the axial piston machine is operated as a motor.
  • the pressure oil flow conveyed into the cylinder spaces 10 of the cylinder drum 6 by, for example, a hydraulic pump via the pressure port and the associated control kidney 20 moves the pistons 12, the resulting piston force transmitting a torque to the drive pulley 5 and thus to the drive shaft 4.
  • the scanning device comprises an inclined surface 31 formed on a side surface 23 of the control body 7 and an extension 30 of the same (see FIG. 2) and a sensor 32 in the form of a sensor pin which penetrates a through hole 33 in the end plate 2 which runs perpendicular to the guide surfaces 21 and is held in constant contact with the inclined surface 31 by means of a spring 34 (only shown in FIG. 4) with its sensor tip 35.
  • the latter has a constant angle of inclination ⁇ and a length corresponding to the swivel range. It runs in the direction of the extension 30 with increasing distance from the associated guide surface 21.
  • the inclined surface 31 runs in the projection as a relatively narrow band along a circular arc, the radius of which is equal to that of the cylindrical support surface 22 and Bottom surface 24 is.
  • a T-shaped pipe section 36 is provided, which is screwed into the through hole 33 with an end piece 37 and is secured by means of a lock nut 38.
  • the spring 34 is supported on the end piece 37 and acts on a collar 39 of the sensor pin 32 with a larger diameter.
  • the sensor pin 32 projects with its end section opposite the sensor tip 35 into the longitudinal anchor (not shown) located in the tube piece 36.
  • the required line connections are discharged to the outside through the lateral branch 36a of the pipe section 36.
  • the arrangement and position of the inclined surface 31 and the sensor 32 shown in FIGS. 2 and 3 can also be used for axial piston machines with two current directions, ie the control body 7 can together with the cylinder drum 6 in opposite directions from a negative angular range over the angle 0 can be pivoted into a positive angular range and back.
  • Occurrence during operation in accordance with the design of the spherical surfaces 8, 9 on the cylinder drum 6 and on the control body 7 force components, the latter depending on the direction of the current against one or the other guide surface 21, as shown in FIG DE-PS 23 13 575, there is always a clearly determined position of the control body 7 relative to the guide surfaces 21, which position differs only by the lateral bearing play.
  • the corresponding swiveling positions of the control body 7 are in the positive and negative angular range resultant positions of the sensor pin 32 within the through hole 33 only by the lateral bearing clearance mentioned, only a scanning device is required for the exact determination of the displacement volume of the axial piston machine. It does not matter which side of the support and swivel bearing the scanning device is assigned to.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Hydraulic Motors (AREA)
EP91107709A 1990-07-13 1991-05-13 Axialkolbenmaschine in Schrägachsen-Bauweise Expired - Lifetime EP0465796B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4022301A DE4022301C1 (enrdf_load_stackoverflow) 1990-07-13 1990-07-13
DE4022301 1990-07-13

Publications (2)

Publication Number Publication Date
EP0465796A1 EP0465796A1 (de) 1992-01-15
EP0465796B1 true EP0465796B1 (de) 1994-02-16

Family

ID=6410206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91107709A Expired - Lifetime EP0465796B1 (de) 1990-07-13 1991-05-13 Axialkolbenmaschine in Schrägachsen-Bauweise

Country Status (2)

Country Link
EP (1) EP0465796B1 (enrdf_load_stackoverflow)
DE (2) DE4022301C1 (enrdf_load_stackoverflow)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4239145C1 (de) * 1992-11-20 1994-03-17 Hydromatik Gmbh Meßeinrichtung zum Erfassen der Verdrängungsvolumen-Einstellung von Axialkolbenmaschinen
DE19819960B4 (de) * 1998-05-05 2005-03-03 Robert Bosch Gmbh Axialkolbenmaschine mit integriertem Schwenkwegmeßsystem
RU2155275C1 (ru) * 1999-01-18 2000-08-27 ОАО "Специальное конструкторское бюро приборостроения и автоматики" Насос переменной производительности
DE10119239C1 (de) * 2001-04-19 2002-12-12 Brueninghaus Hydromatik Gmbh Axialkolbenmaschine in Schrägachsen-Bauweise mit einem Schwenkwinkel-Sensor
DE10119236C1 (de) * 2001-04-19 2002-12-12 Brueninghaus Hydromatik Gmbh Axialkolbenmaschine in Schrägachsen-Bauweise, mit einem Schwenkwinkel-Sensor
RU2286479C1 (ru) * 2005-03-09 2006-10-27 ОАО "Пневмостроймашина" Аксиально-поршневая гидромашина с датчиком положения поршня управления
RU2293878C1 (ru) * 2005-08-29 2007-02-20 ОАО "Пневмостроймашина" Аксиально-поршневая машина с датчиком положения поршня регулирования
RU2293879C1 (ru) * 2005-10-20 2007-02-20 ОАО "Пневмостроймашина" Регулируемая аксиально-поршневая машина с датчиком положения распределителя
RU2300016C1 (ru) * 2005-10-20 2007-05-27 ОАО "Пневмостроймашина" Регулируемая аксиально-поршневая машина с наклонной шайбой
RU2338090C2 (ru) * 2005-11-24 2008-11-10 ОАО "Пневмостроймашина" Аксиально-поршневая машина с преобразователем хода поршня регулятора
DE102011113637A1 (de) 2011-09-16 2013-03-21 Robert Bosch Gmbh Hydrostatische Schrägachsenmaschine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1277318A (fr) * 1960-10-05 1961-12-01 Applic Mach Motrices Perfectionnement aux pompes à débit variable auto-réglées
DE1943356A1 (de) * 1969-08-26 1971-03-18 Rauch Fa Constantin Einrichtung zur Regelung verstellbarer Axialkolbenpumpen
DE2313575C3 (de) * 1973-03-19 1980-01-03 Hydromatik Gmbh, 7900 Ulm Hydrostatische Axialkolbenmaschine

Also Published As

Publication number Publication date
EP0465796A1 (de) 1992-01-15
DE4022301C1 (enrdf_load_stackoverflow) 1991-10-24
DE59101020D1 (de) 1994-03-24

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