WO1999025953A1 - Vorrichtung zum verändern des verdrängungsvolumens einer hydrostatischen maschine - Google Patents
Vorrichtung zum verändern des verdrängungsvolumens einer hydrostatischen maschine Download PDFInfo
- Publication number
- WO1999025953A1 WO1999025953A1 PCT/EP1998/007176 EP9807176W WO9925953A1 WO 1999025953 A1 WO1999025953 A1 WO 1999025953A1 EP 9807176 W EP9807176 W EP 9807176W WO 9925953 A1 WO9925953 A1 WO 9925953A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- adjusting member
- adjusting
- spring
- housing
- leg
- Prior art date
Links
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
- F04B1/324—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
Definitions
- the invention relates to a device according to the preamble of claim 1.
- a known measure to set the zero position is z. B. in an adjustment member in the form of a pivoting lever seated on a shaft to slit the bearing eye of the pivoting lever and by means of a clamping screw crossing the slot as a clamping device.
- the zero position can be set manually by loosening the clamping screw of the pivot lever, adjusting the adjusting mechanism to the exact zero position and then tightening the clamping screw and thus firmly connecting the pivot lever to the shaft.
- the clamping device will come loose in the long run.
- the zero position adjustment is difficult because when the pivot lever is manually rotated on the shaft, a targeted adjustment movement can hardly be carried out. There is also the risk that the setting will be changed unintentionally by tightening the clamping screw before or when the pivot lever is locked on the groove.
- an adjusting member in the form of a pivoting lever is provided which is pivotably mounted independently of two bearing journals of a so-called swashplate and is in drive connection with the pivoting disc by means of a lever mechanism.
- a zero position adjusting device is formed by a latching mechanism, with a radial groove arranged on an end face of the bearing shaft of the pivoting lever, into which a spring-loaded ball can be latched, which is eccentric with respect to the pivot axis of the pivoting lever in a rotatably mounted bushing is arranged.
- a locking point is to be overcome when adjusting the displacement volume, which interferes with the adjusting movement.
- DE 26 20 524 C2 describes a device of the type specified at the outset for adjusting the displacement volume of an axial piston machine with an outer adjusting lever, on the pivot shaft of which an inner reset lever is rigidly attached, which has a driver pin projecting parallel to the pivot shaft and one between two spring legs Coil spring is centered, which overlap the driver pin and a stop pin fixed to the housing on both sides, so that the driver pin and thus also the pivot lever between the spring legs is centered elastically.
- an adjusting device for adjusting the zero position in the region of the pivot lever is not provided. Furthermore, it is not ensured that the centering is free of play.
- the invention has for its object to design a device of the type mentioned so that an adjustment of the zero position while ensuring a simple construction is possible.
- the device according to the invention there is an adjusting device which is inserted into the connection between the spring leg and the adjusting member.
- This ensures not only a simple arrangement and reliable function, but also a simple design and good accessibility, which leads to cost-effective production and simple handling when setting to the zero position.
- the design according to the invention can be integrated into the device in a simple manner with a small construction.
- a coil spring is suitable as a spring, with one spring leg protruding from one end and another spring leg protruding from the other end of the coil spring and being effective between a stop part fixed to the housing and the pivotable adjusting member.
- a spring is particularly suitable for center-centered positioning of the adjusting element in its zero position, the stop part being clamped between the legs and thus ensuring centering.
- the adjusting device with an adjusting element, which can be adjusted manually or on a path directed into the adjusting device is adjustable by means of an adjustment gear.
- the latter configuration also enables the arrangement of a reduction gear, so that not only simple handling when adjusting due to the presence of the gear but also fine adjustment by the reduction gear is possible.
- a reduction gear z. B a rotatable eccentric, which inevitably carries out the adjusting movement of the adjusting member when the eccentric is rotated manually. The tension of the spring can be used for the return movement of the adjusting element.
- adjusting device in a protected manner between the hydrostatic machine and the adjusting member and to provide an adjusting mechanism which is accessible from the outside of the adjusting member. This enables easy handling in the zero position.
- a particularly simple further development of the invention consists in arranging the one-piece member in a guide groove which extends transversely to the associated spring leg and can optionally be fixed, e.g. B. by means of a clamping device. Both this configuration and the aforementioned configuration with an eccentric allow a continuous adjustment of the zero position.
- Fig. 1 shows a hydrostatic machine with an inventive device for
- Fig. 2 shows the partial section II-II in Fig. 1;
- FIG. 3 shows a hydrostatic machine with a device according to the invention for changing the displacement volume in a side view in a modified embodiment
- Fig. 4 shows the partial section IV-IV in Fig. 3;
- FIG. 5 shows the hydrostatic machine according to FIG. 3 in a modified configuration, the adjustment element also being adjusted from its zero position;
- FIG. 6 shows the partial section VI-VI in FIG. 5.
- Fig. 7 shows the hydrostatic machine according to Fig. 3 or 5 in two functional positions.
- the hydrostatic machine is preferably an axial piston machine with a plurality of pistons arranged on a pitch circle and displaceable in cylinder bores, which are connected for a drive function of a so-called swash plate or a comparable support device.
- a so-called swash plate or a comparable support device There are various known designs which are based on the design principle described above and therefore do not need to be described.
- the hydrostatic machine 1 shown in the external view has a device 2 for changing the displacement volume of the hydrostatic machine 1 with an adjusting member 3, which is connected to a component of the hydrostatic machine 1 that adjusts the displacement volume.
- the actuator z. B. executes a straight adjustment movement.
- the adjusting member 3 is an adjusting lever which sits on a shaft 4 which is connected to the drive device for the pistons, here z. B. a swash plate is connected.
- the adjusting member 3 can sit on the shaft 4 with a bearing eye and can be firmly connected to the shaft 4 by a cross pin 5.
- the adjusting member 3 is by a drive element, not shown, for. B. a push rod, between the so-called zero position 0 shown in FIG. 1, in which the hydrostatic machine 1 does not displace any hydraulic medium, can be pivoted into a pivot position shown in FIG. 3, in which the hydrostatic machine 1 is set to a z. B. Maximum displacement volume is set.
- a spring 6 is provided, which is supported on a housing 7 fixed component 7a and engages the adjusting member 3 with a spring leg 6a.
- the adjustment movement of the adjustment member 3 is a swivel movement, the arcuate adjustment direction from the zero position being designated 5a and the reset direction being 5b.
- an adjusting device is required for adjusting the device 2 or the adjusting member 3 in the zero position 0.
- the adjusting device 8 is integrated in the connection between the spring leg 6a and the adjusting member 3 and is thus at a distance of the pivot axis 4a arranged on the adjusting member 3.
- the adjustment member 3 is infinitely adjustable on its adjustment path relative to the spring leg 6a and can be locked in the respective adjustment position.
- an adjusting member 11 which is inserted into the connection between the spring leg 6a and the adjusting member 3 and can be adjusted in a manner to be described directly, manually or by means of an adjusting gear 12 (FIG.
- Fine adjustment e.g. B.
- Fine adjustment e.g. B.
- a connecting element 13 FIGS. 2 and 6) to be described, which can be connected to the adjusting member 3 in continuously variable positions.
- the spring 6 is a helical spring, the windings of which surround the shaft 4 with little movement play and the ends of which are formed as two essentially radially projecting spring legs 6a, 6b.
- the leg 6b supported on the housing 7 is fixed on both sides, for. B. in a slot 7b of the component 7a.
- the spring legs 6a, 6b overlap the housing-fixed component 7a on both sides, whereby they are prestressed against one another and thus clamp the component 7a between them.
- the component 7a forming a stop A for the spring leg 6b or for the spring leg 6a, 6b is formed by a pin which is at a radial distance from the shaft end 4b protruding from the housing 7 into a hole 16 in the housing 7 is firmly inserted.
- the spring 6 is protected between the adjusting member 3 and the housing 7 in a spacing area provided for this purpose.
- one-piece devices 8a, 8b are provided, which are preferably of identical design.
- the adjusting member 3 is supported on the inside in each case on the spring legs 6a, 6b. Due to the mutual support of the spring legs 6a, 6b on the component 7a and due to the mutual support of the adjusting member 3 on the spring legs 6a, 6b, the adjusting member 3 is fixed by the spring 6 held fixed to the housing, whereby the spring legs 6a, 6b the component 7a embrace elastically, a so-called center fixation is present, which is given by the balance of the spring tensions of the elastic spring legs 6a, 6b.
- the end sections 6c, 6d of the spring legs 6a, 6b in contact therewith are bent divergently. If the adjusting member 3 is pivoted out into the pivot position shown in FIG. 3, the spring leg 6b is bent out when it is carried along by the adjusting device 8b, and it also takes over the resetting function when it is reset.
- the device 2 according to the invention can be set up for an adjustment movement from the zero position into an adjustment direction and / or into the opposite adjustment direction, i. H. Be adjustable beyond the zero position 0, which is possible with different types of hydrostatic machines and is common in an axial piston machine, for. B. for the purpose of reversing the direction of rotation in motor operation or reversing the direction of delivery in pumping operation.
- the opposite pivoting direction not shown
- the other leg 6a is bent out by the adjusting device 8a, whereby it takes over the resetting function.
- both setting devices 8a, 8b with the setting gear 12 are of identical design to one another.
- two round through holes 22 are arranged in a lateral widening 21 of the adjusting member 3 in the form of a plate-shaped lever on both sides of a radial plane E extending in the pivot axis of the shaft 4, in each of which a bolt 23 is rotatably mounted, on the an eccentric 24 continues in the longitudinal direction on the inside of the adjusting member 3, which forms an abutment shoulder 25 resting on the inside of the adjusting member 3.
- the pivot pin 23 On the outside of the adjusting member 3, the pivot pin 23 has a thread and a tool engagement element 26 on z. B.
- the pivot pin 23 is held on the adjusting member 3 by means of a screwed-on nut 27.
- the setting member 11 is formed by the outer surface of the eccentric.
- the eccentric 24 can be adjusted in optional rotational positions, the distance between the central axis 28 of the bolt 23 and the contact point between the associated leg end 6c , 6d and the eccentric 24 and thus the position of the adjusting member 11 can be adjusted and adjusted.
- the bolt 23 with the eccentric 24 forms the inevitably effective adjusting gear 12, which due to the design with an eccentric 24 is a reduction gear and enables fine adjustment.
- Both setting devices 8a, 8b are to be adjusted so that the eccentrics 24 touch the spring legs 6a, 6b.
- the adjusting devices 8a, 8b are designed in the sense of the connecting element 13, which in each case in the transverse to the Associated spring legs 6a, 6b directional adjustment 5a, 5b adjustable with respect to the adjusting member 3 and can be determined in the respective adjustment position.
- an elongated hole 29 extends transversely to the associated spring leg, in which the bolt 23 is adjustable and can be locked by tightening the nut 27.
- a cylindrical, thickened bolt section 31 adjoins the inside of the bolt 23 coaxially, which likewise forms an abutment shoulder 25, which forms a clamping device 32 with the nut 27 analogously to the above-described exemplary embodiment.
- the zero position of the bolts 23 when the zero position of the bolts 23 is set, it is to be manually shifted directly into the correct position which is in contact with the associated spring leg. 1 and 2, the spring leg 6a is fixed in the plane of movement, that is to say on both sides, to the setting member 11 formed by the bolt section 31, for. B. in that it borders in a hole or an opening slot 33.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Hydraulic Motors (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59805849T DE59805849D1 (de) | 1997-11-14 | 1998-11-10 | Vorrichtung zum verändern des verdrängungsvolumens einer hydrostatischen maschine |
US09/554,340 US6311607B1 (en) | 1997-11-14 | 1998-11-10 | Device for altering the displacement volume of a hydrostatic machine |
EP98962329A EP1030958B1 (de) | 1997-11-14 | 1998-11-10 | Vorrichtung zum verändern des verdrängungsvolumens einer hydrostatischen maschine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19750614.3 | 1997-11-14 | ||
DE19750614A DE19750614C2 (de) | 1997-11-14 | 1997-11-14 | Vorrichtung zum Verändern des Verdrängungsvolumens einer hydrostatischen Maschine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999025953A1 true WO1999025953A1 (de) | 1999-05-27 |
Family
ID=7848819
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/007176 WO1999025953A1 (de) | 1997-11-14 | 1998-11-10 | Vorrichtung zum verändern des verdrängungsvolumens einer hydrostatischen maschine |
Country Status (4)
Country | Link |
---|---|
US (1) | US6311607B1 (de) |
EP (1) | EP1030958B1 (de) |
DE (2) | DE19750614C2 (de) |
WO (1) | WO1999025953A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6829979B1 (en) * | 2003-07-24 | 2004-12-14 | Eaton Corporation | Swashplate holddown and adjustable centering mechanism |
JP4425590B2 (ja) * | 2003-09-09 | 2010-03-03 | 株式会社 神崎高級工機製作所 | ポンプユニット |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0386738A2 (de) * | 1989-03-09 | 1990-09-12 | Eaton Corporation | Regelbare Verdrängerpumpe oder -motor und Nullagen-Einstellmechanismus dafür |
US5142940A (en) * | 1990-05-28 | 1992-09-01 | Kanzaki Kokyukoki Mfg. Co., Ltd. | Vehicle transmission assembly |
US5622051A (en) * | 1995-06-26 | 1997-04-22 | Kanzaki Kokyukoki Mfg. Co., Ltd. | Axle driving apparatus with cooling tubing |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3230893A (en) * | 1961-05-31 | 1966-01-25 | Sundstrand Corp | Swashplate pump |
DE2333083A1 (de) * | 1973-06-29 | 1975-01-16 | Kopat Ges Fuer Konstruktion En | Axialkolbeneinheit, insbesondere als bestandteil eines hydrostatischen getriebes fuer kleinere leistungen |
DE2620524C2 (de) * | 1976-05-10 | 1986-08-28 | Linde Ag, 6200 Wiesbaden | Steuereinrichtung für die Schwenklage eines Schwenkkörpers |
-
1997
- 1997-11-14 DE DE19750614A patent/DE19750614C2/de not_active Expired - Fee Related
-
1998
- 1998-11-10 US US09/554,340 patent/US6311607B1/en not_active Expired - Lifetime
- 1998-11-10 DE DE59805849T patent/DE59805849D1/de not_active Expired - Lifetime
- 1998-11-10 WO PCT/EP1998/007176 patent/WO1999025953A1/de active IP Right Grant
- 1998-11-10 EP EP98962329A patent/EP1030958B1/de not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0386738A2 (de) * | 1989-03-09 | 1990-09-12 | Eaton Corporation | Regelbare Verdrängerpumpe oder -motor und Nullagen-Einstellmechanismus dafür |
US5142940A (en) * | 1990-05-28 | 1992-09-01 | Kanzaki Kokyukoki Mfg. Co., Ltd. | Vehicle transmission assembly |
US5622051A (en) * | 1995-06-26 | 1997-04-22 | Kanzaki Kokyukoki Mfg. Co., Ltd. | Axle driving apparatus with cooling tubing |
Also Published As
Publication number | Publication date |
---|---|
EP1030958B1 (de) | 2002-10-02 |
DE19750614C2 (de) | 1999-12-16 |
EP1030958A1 (de) | 2000-08-30 |
DE59805849D1 (de) | 2002-11-07 |
DE19750614A1 (de) | 1999-06-02 |
US6311607B1 (en) | 2001-11-06 |
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