EP0921312B1 - Axialkolbenmaschine - Google Patents
Axialkolbenmaschine Download PDFInfo
- Publication number
- EP0921312B1 EP0921312B1 EP98121508A EP98121508A EP0921312B1 EP 0921312 B1 EP0921312 B1 EP 0921312B1 EP 98121508 A EP98121508 A EP 98121508A EP 98121508 A EP98121508 A EP 98121508A EP 0921312 B1 EP0921312 B1 EP 0921312B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- axial piston
- piston machine
- housing
- machine according
- pressure
- 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
Images
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
- F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
- F04B1/124—Pistons
- F04B1/126—Piston shoe retaining means
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/22—Arrangements for enabling ready assembly or disassembly
Definitions
- the invention relates to an axial piston machine according to the preamble of Claim 1.
- the tappets due to the axial tensile force of the piston pushes outwards, causing the holding plungers to lose their stability and no or only can exert a reduced retention force on the perforated disc.
- the perforated disc by the axial tensile force of the piston overused and z. B. is bent.
- the tappets are particularly inclined, to dodge radially outwards. If, on the other hand, the inclination of the inclined surfaces is too small is, there is a risk that the holding plungers jam on the perforated disc, causing the Rotary operation would be impaired and due to wear with an insufficient Life would be expected.
- Another major disadvantage of the known axial piston machine is that the mounting plungers due to their projection into the housing interior or Disassembly of the components located in the interior of the housing may be impaired.
- the invention has for its object an axial piston machine of the beginning Specify the type specified so that while ensuring safe support of the Retraction device assembly or disassembly of those located in the interior of the housing Components are not affected by the restraint.
- the retaining device is in the Functional operation of the axial piston machine automatically or automatically from a Retraction device release position in a the retraction device behind work position shifted and after switching off the functional mode automatically moved back to their release position, the shift into the Working position by printing from an existing, adjacent or neighboring Pressure chamber or a pressure line takes place and the shift to the release position done by the force of a spring.
- an inherent pressure existing in the functional operation of the axial piston machine or an external pressure, e.g. B. from an adjacent axial piston machine can be in easily generate an insertion force that is greater than the required retraction or Pushing force, so that the position of the restraint in their working position is guaranteed.
- the retraction device is in the area of the side half of the axial piston machine to arrange, in the area of which the pistons perform a suction stroke, this area extends approximately over 180 °.
- One in the area of this side half, preferably centrally arranged retaining device, or several arranged on this side half Restraint devices are installed in one for pump operation
- Axial piston machine also works when the axial piston machine is due to a braking function executes an engine operation.
- adjustable axial piston machines are each one or more restraint devices to be arranged in the area of both side halves.
- An advantageous embodiment for a restraint device is a cross section preferably circular stop pin, which is in a radial guide hole in the housing is slidably mounted between the working position and the release position. It is advantageous to provide the pin in its outer end region with a flange to which a spring arranged between the latter and an inner perforated shoulder, in particular a coil spring to attack and the stop pin in its release position can act.
- a spring arranged between the latter and an inner perforated shoulder in particular a coil spring to attack and the stop pin in its release position can act.
- For pneumatic or hydraulic displacement of the pin in its working position can be the one located radially outside with respect to the stop pin Hole space through a channel with the housing interior or with an inside Functional operation of the axial piston machine has an overpressure space be connected.
- the channel can run in the housing wall or lengthways in the stop pin.
- stop pin it is also advantageous to arrange the stop pin so that between it and the Retraction device is a small distance, which is only dimensioned so large that at overloading and deformation of the retraction device in its elastic range the retractor strikes the stop pin before it reaches its yield point is deformed out.
- the drawing shows an axial partial section through an inventive Axial piston.
- the main parts of those generally designated 1 Axial piston machines are a housing 2 with a section that is visible in the drawing Housing wall 2a, which encloses a housing interior 3, in which on a shaft 4 a cylinder drum 5 with several, preferably distributed on a pitch circle and lengthways Directed cylinder bores 6 are arranged, a plurality of pistons 7, which in the Cylinder bores 6 are axially displaceably mounted, a plurality of sliding shoes 8 pivotable, but axially fixed with spherical piston heads 9 at one end of the Pistons 7 are connected, a swash plate 11, on the inclined surface 12 the Sliding shoes 8 abut and are axially supported, the swash plate 11 by one perpendicular to the longitudinal center axis of the axial piston machine 1 or the axis of rotation 13 of the Shaft 4 extending pivot axis 14 in a pivot bearing, not shown is pivotally mounted and is locked in the
- the retraction device 15 is through a perforated disc 22 in the number of 8 existing holes 23 formed, the edges of the holes in the sliding shoes Area surrounded by tapered glide heads with play and with their Swash plate 11 facing side on a foot flange 24 of the associated slide shoe 8 rest so that the foot flange 24 with little movement between the Inclined surface 12 and the perforated disc 22 is held.
- the perforated disc 22 lies against it its side facing away from the swash plate 11 on a shoulder surface of the shaft 4 or Cylinder drum 5, whereby it faces away from the swash plate 11 Axis direction is supported.
- the shoulder surface 25 can also be on a shaft 4 fixed support ring 26 may be formed.
- a swiveling swash plate 11 is the shoulder surface 25 a spherical ring-shaped surface on which the perforated disc 22nd is supported with an inner support ring 27 which is tangential or concave spherical ring-shaped contact surface rests on the shoulder surface 25.
- the retention device 16 is by a cylindrical or step-cylindrical Stop pin 31 formed, with little movement in a radial Guide hole or guide bore 32 radially displaceable in the housing wall 2a is mounted, the radial central axis 33 perpendicular to the axis of rotation 13 and parallel to Pivot axis 14 runs.
- the stop pin 31 is between one radial inserted and shown in the drawing, in the radial position inner pin end 34 overlaps the outer edge of the perforated disk 22 and axially can support, and a radially extended release position in which the pin end 34 is pushed out of the housing interior or at least the perforated disc 22 without Cylinder drum 5 or the swash plate 11 for axial assembly or disassembly releases, adjustable.
- the movements are limited by a stop 35.
- the Working position is by a step surface 37 of the step-shaped Guide bore 32 and a step surface 38 of the radially outward divergent step trained stop pin 31 determined.
- a plug 39 is in the outside incorporated guide hole 32 screwed in and sealed.
- To seal the Stop pin 31 is one or two ring seals 41 are provided between the wall of the guide bore 32 and the outer surface of the stop pin 31 arranged in an annular groove on one or on both sides of the step surfaces 37, 38 and are effective.
- the stop pin 31 is in its release position by the force of a spring 40 biased, which in the present embodiment is formed by a coil spring which engages and engages a flange 31a at the outer end of the stopper pin 31 a step surface 32a of an outer bore extension 32b of the guide bore 32 is applied.
- a spring 40 biased which in the present embodiment is formed by a coil spring which engages and engages a flange 31a at the outer end of the stopper pin 31 a step surface 32a of an outer bore extension 32b of the guide bore 32 is applied.
- the stop pin 31 is arranged so that between the retraction device 15, here the perforated disk 22, and the support surface 31b there is a small distance a which is at most so large that the retraction device 15 in the event of an overload hits the support surface 31b before the retraction device 15 beyond their elastic deformation range or beyond their yield strength is deformed. This ensures that the retraction device 15 only at Load peaks come into contact with the support surface 31b and then effectively over the Stop pin 31 is supported on the housing 2.
- the overload stops return the retraction device 15 due to its elasticity back to its starting position back. This causes friction between the retraction device 15 and the Support surface 31b avoided under normal loads of the axial piston machine, whereby Frictional wear is reduced or, if load peaks do not occur, be avoided.
- the hole space located radially outside of the stop pin 31 forms in functional operation the axial piston machine 1 has a secondary pressure chamber 42 which is passed through a channel 43, 44 is connected to a primary pressure chamber in which the Axial piston machine 1, a pressure prevails, which through the channel 43, 44 in the Pressure chamber 42 propagates and a radial at the outer end of the stop pin 31 generates inward thrust that overcomes the force of the spring 40 and the Stop pin 31 moves into its working position.
- the primary pressure chamber it can e.g. B. act on the housing interior 3, in a sufficient leakage pressure during the functional operation of the axial piston machine 1 sets, which is able to generate the aforementioned thrust. It is too take into account that this interior pressure on the end face of the pin end 34 a Opposing force generated and therefore the effective differential area between the outer and the inner end face of the stop pin 31 or the interior pressure correspondingly large is to be measured.
- a channel connection between the secondary pressure chamber 42 and the housing interior 3, which by a in the Housing wall 2a extending channel or through a lengthwise through the stop pin 31st extending bore 43a may be formed.
- the Pressure chamber 42 through a running in the housing wall 2a, z. B.
- both channels 43, 44 are sufficient for safe functional operation.
- both channels 43, 44 can be present at the same time, only one or both channels can be connected to the associated pressure source.
- a check valve 45, 46 is to be arranged in both channels 43, 44, its valve body 47, 48 in the direction of the associated pressure source closes.
- the valve bodies 47, 48 can be biased into their closed position by a spring or they can be without Spring can be arranged freely movable.
- the check valves 45, 46 limit a closed pressure chamber system in which the Pressure must be released before z. B. for disassembly of the inclined slide 11 or the retraction device 15, the stop pin 31 is displaceable into its release position. This can e.g. B. by at least slightly opening the sealing plug 39th respectively.
- Another measure for automatic relaxation or delayed Relaxation of the pressure chamber system consists of the pressure chamber system by one connect small or restricted duct to the return system or the tank, the throttle is dimensioned as small as possible in order to avoid loss of power should be.
- Such a relaxation channel 53 with a throttle 54 can, for. B. in Sealing plug 39 may be arranged, as indicated in the drawing.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Description
Claims (12)
- Axialkolbenmaschine (1) mit einem Gehäuse (2), mit einer in einem Gehäuseinnenraum (3) drehbar angeordneten Zylindertrommel (5), in welcher mehrere Zylinderbohrungen (6) ausgebildet sind, in welchen Kolben (7) bewegbar geführt sind, die sich über Gleitschuhe (8) an einer Schrägscheibe (11) abstützen, mit einer Rückzugeinrichtung (15), an welcher sich die Gleitschuhe (8) bei der Rückzugbewegung der Kolben (7) abstützen, und mit einer im Gehäuse (2) gelagerten und gegen eine Feder (40) bewegbaren Rückhalteeinrichtung (16) zum Stützen der Rückzugeinrichtung (15) an dem Gehäuse (2),
dadurch gekennzeichnet, daß die Rückhalteeinrichtung (16) von einem angrenzenden Druckraum (42) so beaufschlagt ist, daß die Rückhalteeinrichtung (16) in den Gehäuseinnenraum (3) geschoben wird, wenn in dem Druckraum (42) ein Druck ansteht, wobei der Druckraum (42) mit dem Gehäuseinnenraum (3) und/oder einer im Betriebszustand der Axialkolbenmaschine Druck führenden Leitung (44) verbunden ist, und
daß die Rückhalteeinrichtung (16) durch die Feder (40) so beaufschlagt ist, daß sie die Rückhalteeinrichtung (16) aus dem Gehäuseinnenraum (3) zurückzieht, wenn der Druckraum (42) im wesentlichen drucklos ist. - Axialkolbenmaschine nach Anspruch 1,
dadurch gekennzeichnet, daß die Rückhalteeinrichtung (16) auf der Seite angeordnet ist, auf der die Kolben (7) jeweils einen Saughub ausführen, oder auf beiden Seiten eine Rückhalteeinrichtung (16) angeordnet ist. - Axialkolbenmaschine nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Rückhalteeinrichtung (16) durch ein oder mehrere in Umfangsrichtung des Gehäuses (2) nebeneinander angeordnete Anschlagzapfen (31) gebildet ist, die jeweils in einem etwa radialen Führungsloch (32) im Gehäuse (2) zwischen einer in den Gehäuseinnenraum (3) geschobenen Arbeitsstellung, in der der Anschlagzapfen (31) die Rückzugeinrichtung (15) auf ihrer der Schrägscheibe (11) abgewandten Seite hintergreift, und einer aus dem Gehäuseinnenraum (3) zurückgezogenen Freigabestellung verschiebbar ist. - Axialkolbenmaschine nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß der Druckraum (42) durch einen in der zugehörigen Gehäusewand (2a) oder längs im Anschlagzapfen (31) verlaufenden ersten Verbindungskanal (43) mit dem Gehäuseinnenraum (3) verbunden ist. - Axialkolbenmaschine nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß die Druck führende Leitung einen in dem Druckraum (42) mündenden zweiten Verbindungskanal (44) in der Gehäusewand (2a) aufweist. - Axialkolbenmaschine nach Anspruch 4 und 5,
dadurch gekennzeichnet, daß der erste und der zweite Verbindungskanal (43, 44) zugleich vorhanden sind und in jedem dieser Verbindungskanäle (43, 44) ein Rückschlagventil (45, 46) angeordnet ist. - Axialkolbenmaschine nach Anspruch 6,
dadurch gekennzeichnet, daß das von den Rückschlagventilen (45, 46) begrenzte und den Druckraum (42) enthaltende Druckraumsystem durch eine gedrosselte Leitung (53) mit einer Leitung entsprechend niedrigen Druckes verbunden ist. - Axialkolbenmaschine nach einem der Ansprüche 3 bis 7,
dadurch gekennzeichnet, daß die Schrägscheibe (11) um eine Querachse schwenkbar gelagert ist und ein Anschlagzapfen (31) in einer die Schwenkachse (14) enthaltenden Axialebene der Axialkolbenmaschine (1) bezüglich der Drehachse (13) der Axialkolbenmaschine (1) auf einer oder auf beiden Seiten der Axialkolbenmaschine (1) angeordnet ist. - Axialkolbenmaschine nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß der der Rückzugeinrichtung (15) in der Arbeitsstellung gegenüberliegende Flächenbereich der Rückhalteeinrichtung (16) bezüglich der Drehachse (13) der Axialkolbenmaschine (1) radial verläuft. - Axialkolbenmaschine nach einem der Ansprüch 7 bis 9,
dadurch gekennzeichnet,
der Anschlagzapfen (31) an seiner der Rückzugeinrichtung (15) zugewandten Seite konvex gerundet ist, vorzugsweise eine zylindrische Querschnittsform aufweist. - Axialkolbenmaschine nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß zwischen der Schrägscheibe (11) und der Rückhalteeinrichtung (16) ein axialer Abstand (a) vorgesehen ist, der nur so groß bemessen ist, daß im Funktionsbetrieb der Axialkolbenmaschine (1) die Rückzugeinrichtung (15) gegen die Rückhalteeinrichtung (16) stößt, bevor die Rückzugeinrichtung (15) über ihre elastische Verformungsgrenze hinaus verformt wird. - Axialkolbenmaschine nach einem der Ansprüche 3 bis 11,
dadurch gekennzeichnet, daß das Führungsloch (32) ein Stufenloch ist und der Anschlagzapfen (31) ein Stufenstift ist, wobei eine Stufenfläche (37, 38) die Bewegung des Anschlagzapfens (31) in seine Arbeitsstellung begrenzt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19753654 | 1997-12-03 | ||
DE19753654A DE19753654C2 (de) | 1997-12-03 | 1997-12-03 | Axialkolbenmaschine |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0921312A2 EP0921312A2 (de) | 1999-06-09 |
EP0921312A3 EP0921312A3 (de) | 2000-04-05 |
EP0921312B1 true EP0921312B1 (de) | 2003-08-06 |
Family
ID=7850629
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98121508A Expired - Lifetime EP0921312B1 (de) | 1997-12-03 | 1998-11-13 | Axialkolbenmaschine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0921312B1 (de) |
DE (2) | DE19753654C2 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19909311C2 (de) * | 1999-03-03 | 2001-01-25 | Brueninghaus Hydromatik Gmbh | Axialkolbenmaschine |
DE10035630C1 (de) | 2000-07-21 | 2002-03-14 | Brueninghaus Hydromatik Gmbh | Axialkolbenmaschine mit einer Rückzugeinrichtung |
DE102004043745B3 (de) * | 2004-09-10 | 2006-02-09 | Danfoss A/S | Hydraulische Axialkolbenmaschine |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3453965A (en) * | 1966-08-29 | 1969-07-08 | Applied Power Ind Inc | Valve plate motor pump |
US3631763A (en) * | 1970-01-02 | 1972-01-04 | Sperry Rand Corp | Power transmission |
US3587403A (en) * | 1970-01-16 | 1971-06-28 | Sperry Rand Corp | Power transmission |
US3605565A (en) * | 1970-03-13 | 1971-09-20 | Sperry Rand Corp | Power transmission |
US4111103A (en) * | 1977-02-14 | 1978-09-05 | Commercial Shearing, Inc. | Thrust rings for swash plate pumps and motors |
-
1997
- 1997-12-03 DE DE19753654A patent/DE19753654C2/de not_active Expired - Fee Related
-
1998
- 1998-11-13 DE DE59809197T patent/DE59809197D1/de not_active Expired - Fee Related
- 1998-11-13 EP EP98121508A patent/EP0921312B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0921312A2 (de) | 1999-06-09 |
DE19753654C2 (de) | 1999-10-21 |
EP0921312A3 (de) | 2000-04-05 |
DE19753654A1 (de) | 1999-06-17 |
DE59809197D1 (de) | 2003-09-11 |
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