WO1999008000A1 - Hydraulic unit with fastening device for additional aggregate units - Google Patents
Hydraulic unit with fastening device for additional aggregate units Download PDFInfo
- Publication number
- WO1999008000A1 WO1999008000A1 PCT/EP1998/005097 EP9805097W WO9908000A1 WO 1999008000 A1 WO1999008000 A1 WO 1999008000A1 EP 9805097 W EP9805097 W EP 9805097W WO 9908000 A1 WO9908000 A1 WO 9908000A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housing
- hydraulic unit
- support ring
- flange
- bearing
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/02—Arrangements of bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
Definitions
- the invention relates to a hydraulic unit according to the preamble of claim 1 and a device for fastening a hydraulic unit with an additional unit according to the preamble of claim 14.
- Hydraulic units in particular hydraulic motors of known design for driving additional units, such as, for example, grabs, excavators and other devices, are known.
- these hydraulic units have a housing designed as a stator and a rotor designed as a flange shaft. Between the housing and a shaft section of the rotor there are displacement elements which, when subjected to a hydraulic fluid under pressure, cause the rotor to rotate, and corresponding bearings which absorb axial and radial loads are provided.
- a flange section is formed in one piece on the shaft section of the rotor, the diameter of which is larger than the diameter of the housing and on which the housing is slidably supported when the rotor rotates.
- the rotor with the shaft section and the flange section is designed as a flange shaft.
- through holes are formed circumferentially, through which fasteners are provided for the corresponding fastening of additional units. Due to the relatively large diameter of the flange section of the flange shaft, the axial loads to which the hydraulic unit is exposed in use are limited.
- the shaft section of the flange shaft is supported by an oblique roller bearing arranged on the end facing the housing and the end facing the flange section. Because under the tough operating conditions, there are sometimes considerable radial loads.
- the hydraulic unit according to the invention has a rotor, a stator, which forms the housing, and displacement elements, which between The rotor and housing are arranged and to which a correspondingly pressurized hydraulic fluid is supplied in order to set the rotor of the hydraulic unit in rotation.
- the rotor is designed with a shaft section and a flange section as a flange shaft, which is used to fasten additional units.
- the diameter of the flange section is larger than the housing diameter, so that the flange section protruding beyond the outer circumference of the housing forms an area through which fasteners can be passed, which serve to fasten an additional unit to the hydraulic unit.
- a support ring can be releasably connected to the flange shaft, which is supported by an inner shoulder on an outer shoulder on the housing, forming a sliding area.
- This support ring is connected to the flange section of the flange shaft and the additional unit by means of fasteners when the additional unit is flanged on. This means that the support ring rotates together with the rotor.
- the housing has an outer shoulder and the support ring has an inner shoulder and both shoulders cooperate, the axial load by the additional unit is not only absorbed by the flange portion of the rotor, but also by the housing itself.
- the surfaces which slide together with the rotor when the support ring rotates thus form a sliding area which serves to absorb axial loads and also radial loads.
- a major advantage of such a support ring is that in a hydraulic unit according to the invention the axial loads can be increased due to the force distribution in the flange section of the flange shaft and in the housing. Furthermore, it is through the inner shoulder possible on the support ring and the outer shoulder on the housing, arranged on the flange end of the shaft section of the flange shaft
- the sliding area is preferably designed with a bearing play and preferably as a sliding bearing.
- the sliding area can be limited directly to the area of the inner shoulder of the support ring and the outer shoulder of the housing, which slide against one another in the operating state, or can also extend over the inner surface of the support ring, which extends essentially in the axial direction of the hydraulic unit, which in operation on a Part of the outer circumference of the housing runs around.
- the inner shoulder and the outer shoulder are inclined to one another. This means that this inner shoulder is suitable both for absorbing axial loads and for absorbing radial loads.
- inclined to one another is to be understood to mean that the one that forms the inner shoulder and the outer shoulder
- the support ring rotates with at least one inner surface on an outer surface of the housing.
- at least a part of the inner surface, which faces the outer circumference of the housing, is supported in a sliding manner around the housing when the rotor rotates with the support ring mounted.
- an O-ring is arranged between the inner surface and the outer surface.
- the flange section of the flange shaft has an annular step on its side facing the housing, on which the housing is supported in a sliding manner with a step which is essentially of the same shape.
- This additional ring step in the area of the flange section of the flange shaft serves to absorb radial loads on the hydraulic unit connected to an additional unit, which can occur, for example, as a result of lateral hitting obstacles, walls, etc.
- an O-ring acting as a seal can preferably be provided in the area of the step of the flange section. Such an O-ring prevents hydraulic fluid with which the hydraulic unit is driven from escaping from the interface, ie the sliding area of the housing on the flange section.
- the outer diameter of the support ring is substantially equal to the outer diameter of the flange section of the flange shaft, so that the outer surface of the support ring is essentially flush with the outer surface of the flange section.
- the entire support ring is preferably made of a plain bearing material, which can preferably also be self-lubricating.
- a plain bearing material of this type has the strength required to be able to reliably and securely connect the support ring to the additional unit via the flange section of the flange shaft, and also has the necessary lubricating properties in order to achieve the required sliding properties between the housing and the rotor can.
- an additional lubricant line is provided, which is preferably fed from the interior through the housing to the immediate sliding area for its lubricant supply.
- an additional lubricant line is provided, which is preferably fed from the interior through the housing to the immediate sliding area for its lubricant supply.
- a separate sliding to be lubricated Bearing can be provided, or it can consist entirely of sliding material according to the above-mentioned embodiment.
- a check valve is preferably arranged in the lubricant line. Such a check valve prevents the immediate hydraulic unit from being damaged by the displacement elements and the bearing in the event of pressure surges which may occur during operation.
- the bearing of the shaft section has an axial and radial bearing that supports only at its end region projecting into the housing. This is possible above all if the support ring has a sufficiently large inner shoulder which interacts with a sufficiently large outer shoulder of the housing and if the flange section of the flange shaft also has an annular step. As a result, both the support ring and the flange section of the flange shaft itself can absorb increased radial and axial loads, so that the bearing of the shaft section of the flange shaft facing the flange section can be dispensed with.
- the device which is used to fasten a hydraulic unit with an additional unit, has a support ring which can be detachably fastened to a flange shaft which forms the rotor of the hydraulic unit and which comprises an inner shoulder, the inner shoulder forming a sliding area on one Outer shoulder of the housing is supported.
- the hydraulic unit is in particular a hydraulic motor
- the additional unit is in particular a gripper.
- a major advantage of this support ring according to the invention is that both increased axial and radial loads not only in the Flange section of the flange shaft, but also can be introduced into the housing.
- This division of the forces in a given hydraulic unit means that the axial load which can be coupled on and the radial load which can be absorbed during operation can be increased without the hydraulic unit itself having to be replaced under these increased loads.
- the inner shoulder of the support ring and the outer shoulder are inclined to one another, the angle of inclination to a plane extending essentially radially to the longitudinal axis of the shaft section of the flange shaft for the inner shoulder and the outer shoulder being substantially the same. This inclined arrangement of the inner shoulder and the outer shoulder allows both axial and radial loads to be introduced into the housing of the hydraulic unit via the support ring.
- the support ring essentially consists entirely of a plain bearing material, which is preferably self-lubricating.
- the immediate sliding area between the support ring and the housing can be lubricated by supplying lubricant.
- the support ring has slide bearing material at least in sections of the sliding area. This means that it is not absolutely necessary to provide bearing material on all surfaces of the sliding area.
- the support ring is formed at least in two parts. This is particularly advantageous when, for example, a plurality of inner shoulders and a plurality of outer shoulders are to be provided on the support ring or on the housing, which interact in each case. Additional advantages. Features and possible applications of the present invention will now be explained in detail by means of exemplary embodiments with reference to the accompanying drawings.
- FIG. 1 shows a hydraulic unit according to the prior art
- 2 shows the area of a hydraulic unit according to the invention, on which a support ring according to the invention acts
- 3 shows a further exemplary embodiment of a hydraulic unit according to the invention
- Fig. 4 shows a further embodiment of the invention, in which a plain bearing is provided between the outer shoulder of the housing and the inner shoulder of the support ring
- 5 shows a further exemplary embodiment of the invention, in which lubricant is supplied to the sliding region via an oil supply line
- Fig. 6 shows a cross section of a support ring according to the invention.
- the known hydraulic unit 1 shows a hydraulic unit according to the prior art.
- the known hydraulic unit 1 has a rotor 2 and a housing 3. Between the rotor 2 and the housing 3 there are displacement elements 4, which are acted upon by a hydraulic fluid under a corresponding pressure, which causes the rotor 2 of the hydraulic unit 1 to rotate by means of a tooth engagement.
- the rotor 2 has a shaft section 6 and a flange section 7.
- the shaft section 6 is supported at its end facing the housing by means of a tapered roller bearing and at its end facing the flange section by means of a tapered roller bearing 21 relative to the housing 3.
- the hydraulic unit has a tab 20 with a transport or fastening eye. This eye is used, for example, to bring the hydraulic unit into a hanging position with a correspondingly coupled additional unit.
- Such an additional unit is connected to the flange section 7 of the rotor 2 by means of screws. These screws pass through the outer circumferential area of the flange section, which protrudes beyond the outer circumference of the housing, through correspondingly provided through openings and can be screwed to the additional unit.
- the entire axial load due to, for example, the weight of the additional unit is introduced into the rotor 2 via the outer region of the flange section 7.
- the bearings 5 and in particular the bearing 21 must therefore be of strong dimensions and must be designed in such a way that both axial and radial loads can be absorbed.
- Via the direct connection between the flange section 7 of the rotor 2 and the additional unit only axial forces can be absorbed and transmitted.
- very large radial loads may also occur if, for example, the hydraulic unit connected to the auxiliary unit experiences substantially radial impacts or impacts due to a side impact on an obstacle.
- FIG. 2 shows a first exemplary embodiment in accordance with the invention.
- the Housing 3 is supported in relation to the rotor 2 in the area of the shaft section 6 by means of an oblique roller bearing 21.
- the flange section 7 of the rotor 2 has a diameter which is larger than the outside diameter of the housing 3.
- through-openings 19 are provided distributed around the circumference.
- the housing 3 has a region in the region of the flange section 7 of the rotor 2 which has a larger diameter than the remaining region of the housing. As a result, the housing has an outer shoulder 9.
- a supporting ring 8 is supported on the part of the flange section 7 of the rotor 2 which projects beyond the outer diameter, the outer diameter of which is essentially flush with the outer diameter of the flange section 7.
- the support ring 8 has circumferentially distributed through holes which are aligned with the through holes 19 in the outer flange section 7.
- a screw head adequate recess which receives a screw head in a lowering manner when the support ring 8 is connected to the flange section 7 and the additional unit to be attached to it.
- the height of the outer shoulder 9 of the housing 3, which extends in the axial direction, is dimensioned such that, in cooperation with the inner shoulder 10 of the support ring 8, it leaves at least one bearing play, so that when the support ring 8 is mounted, its inner shoulder 10 does not rest on the inner shoulder 9 is tensioned, but the inner shoulder 10 and the outer shoulder 9 can slide on each other.
- the flange section 7 of the rotor 2 has an annular step 15, which cooperates with a substantially congruent step 16 of the housing 3, essentially in the entire area of the housing which faces the flange section 7 provided with a ring step 15, the Step shape of the ring section 7 corresponds to the step shape of the housing 3.
- the support ring 8 is made of plain bearing material, so that a special plain bearing between the inner shoulder 10 and the outer shoulder 9 is not provided.
- FIG. 3 shows a further exemplary embodiment according to the invention, which essentially corresponds to the exemplary embodiment according to FIG. 2.
- the support ring 8 has no recess for lowering a head of a screw serving as a fastener. Rather, the screw head lies fully on the radial ring surface when the support ring 8 is mounted.
- Fig. 4 shows a further embodiment according to the invention.
- the basic structure of the support ring 8 corresponds to that of the exemplary embodiments according to FIGS. 2 and 3.
- an additional slide bearing 11 is provided between the inner shoulder 10 of the support ring 8 and the outer shoulder 9 of the housing 3.
- This slide bearing 1 1 can be self-lubricating or externally lubricated.
- the inner, axially extending surface of the support ring 8, which is supported on the outer surface of the housing 3 in a sliding manner can likewise be a sliding surface provided with a sliding bearing material. It is possible that only selected areas of the circumferential inner surface 12 of the support ring 8, which is supported on the outer surface of the housing 3, are provided with a plain bearing material.
- the support ring 8 is made entirely of a plain bearing material, it is not necessary to additionally form individual areas as a plain bearing.
- an O-ring 14 is also provided in the area of this sliding surface between the inner surface of the support ring 8 and the outer surface 13 of the housing 3.
- Such an O-ring 14 is particularly useful when the slide bearing 1 1 is lubricated externally, so that the O-ring 14 prevents lubricant from the slide bearing 11 between the support ring 8 and the exact 3 escapes.
- the side of the flange section 7 facing the housing 3 has an annular step 15 corresponding to the exemplary embodiment according to FIGS. 2 and 3. which is congruent in shape to the step 16 formed in the housing, so that the housing, with its side facing the flange section 7, is slidably supported on the flange section.
- a hydraulic motor serving as a hydraulic unit is mounted under pretension, so that, with appropriate support of the support ring 8, compensation of the clamping forces that occur can be achieved.
- an oil supply line 17 is provided for supplying a slide bearing, which in turn is arranged between the outer shoulder 9 of the housing 3 and the inner shoulder 10 of the support ring 8, so that the slide bearing 11 is permanently supplied with lubricating oil.
- This oil supply line 17 is guided from the interior of the housing, in which hydraulic oil is present, into the region of the sliding bearing 11 on the outer shoulder 9.
- a check valve 18 is arranged in the oil supply line 17 in order to prevent pressure peaks from possibly occurring back into the interior of the hydraulic unit. With the help of the oil supply line 17, it is possible to compensate for a contact pressure generated by pretensioning, so that optimal conditions for effective lubrication conditions are given.
- FIG. 6 shows a cross section through the support ring according to the invention, which corresponds to the exemplary embodiments according to FIGS. 2, 4 and 5.
- the support ring 8 has an inward shoulder, the inner shoulder 10.
- This inner shoulder 10 is supported on the outer shoulder 9 of the housing 3 or on a slide bearing arranged between the inner shoulder 10 and the outer shoulder 9, so that higher axial loads on the auxiliary unit can be introduced into the housing 3 via the flange section 7 on the hydraulic unit 1 are.
- the inner surface 12 of the support ring 8 is designed so that it is essentially slidingly supported on the outer surface 13 of the housing 3 in the contact area.
- the support ring 8 is preferably formed from a plain bearing material.
- the base material of the support ring 8 is a material of high strength, depending on the respective application, and that at least some sliding bearing materials are provided on the sliding surfaces.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mounting Of Bearings Or Others (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Reciprocating Pumps (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Hydraulic Motors (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98946319A EP1003975B1 (en) | 1997-08-12 | 1998-08-12 | Hydraulic unit with fastening device for additional aggregate units |
AU93414/98A AU9341498A (en) | 1997-08-12 | 1998-08-12 | Hydraulic unit with fastening device for additional aggregate units |
AT98946319T ATE217393T1 (en) | 1997-08-12 | 1998-08-12 | HYDRAULIC UNIT WITH FASTENING DEVICE FOR ADDITIONAL UNITS |
DE59804071T DE59804071D1 (en) | 1997-08-12 | 1998-08-12 | HYDRAULIC UNIT WITH FASTENING DEVICE FOR ADDITIONAL UNITS |
SI9830210T SI1003975T1 (en) | 1997-08-12 | 1998-08-12 | Hydraulic unit with fastening device for additional aggregate units |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19734900A DE19734900C2 (en) | 1997-08-12 | 1997-08-12 | Hydraulic unit with fastening device for additional units |
DE19734900.5 | 1997-08-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999008000A1 true WO1999008000A1 (en) | 1999-02-18 |
Family
ID=7838739
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/005097 WO1999008000A1 (en) | 1997-08-12 | 1998-08-12 | Hydraulic unit with fastening device for additional aggregate units |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1003975B1 (en) |
AT (1) | ATE217393T1 (en) |
AU (1) | AU9341498A (en) |
DE (2) | DE19734900C2 (en) |
WO (1) | WO1999008000A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202005009540U1 (en) * | 2005-06-17 | 2006-10-26 | Kinshofer Greiftechnik Gmbh & Co. Kg | Hydraulic torque motor used as a slewing gear for an excavator grab comprises a rotor supported axially and radially on a housing via sliding bearings and an engine connecting piece joined to the rotor |
EP1882855A3 (en) * | 2006-07-25 | 2008-04-30 | Kinshofer GmbH | Hydraulic motor |
DE102008035088A1 (en) | 2008-07-28 | 2010-02-04 | Av Hydraulikmotoren Gmbh | Hydraulic aggregate i.e. hydraulic motor, has locking device whose locking unit acts together with locking recess in locking position and blocks rotor with respect to stator in mechanically form-fit, torque-proof and detachable manner |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0305785A2 (en) * | 1987-08-31 | 1989-03-08 | Kinshofer Greiftechnik Gmbh | Hydraulic motor |
DE4200062A1 (en) * | 1992-01-03 | 1993-07-08 | Ervin Kratochvil | Cycloidal speed reduction gear with toothed wheel engaging ring of pins - incorporates drive shaft fitted with eccentric bush which carries toothed wheel |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4335678C2 (en) * | 1993-10-20 | 2002-06-20 | Thumm Heinz Oelhydraulik | Rotary device for excavator grab |
-
1997
- 1997-08-12 DE DE19734900A patent/DE19734900C2/en not_active Expired - Fee Related
-
1998
- 1998-08-12 WO PCT/EP1998/005097 patent/WO1999008000A1/en active IP Right Grant
- 1998-08-12 EP EP98946319A patent/EP1003975B1/en not_active Expired - Lifetime
- 1998-08-12 AT AT98946319T patent/ATE217393T1/en active
- 1998-08-12 DE DE59804071T patent/DE59804071D1/en not_active Expired - Lifetime
- 1998-08-12 AU AU93414/98A patent/AU9341498A/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0305785A2 (en) * | 1987-08-31 | 1989-03-08 | Kinshofer Greiftechnik Gmbh | Hydraulic motor |
DE4200062A1 (en) * | 1992-01-03 | 1993-07-08 | Ervin Kratochvil | Cycloidal speed reduction gear with toothed wheel engaging ring of pins - incorporates drive shaft fitted with eccentric bush which carries toothed wheel |
Also Published As
Publication number | Publication date |
---|---|
AU9341498A (en) | 1999-03-01 |
DE19734900C2 (en) | 2001-03-08 |
EP1003975B1 (en) | 2002-05-08 |
DE59804071D1 (en) | 2002-06-13 |
ATE217393T1 (en) | 2002-05-15 |
DE19734900A1 (en) | 1999-02-25 |
EP1003975A1 (en) | 2000-05-31 |
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