EP3953614A1 - Pivoting thrust washer - Google Patents
Pivoting thrust washerInfo
- Publication number
- EP3953614A1 EP3953614A1 EP20710834.1A EP20710834A EP3953614A1 EP 3953614 A1 EP3953614 A1 EP 3953614A1 EP 20710834 A EP20710834 A EP 20710834A EP 3953614 A1 EP3953614 A1 EP 3953614A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thrust washer
- stop
- rotation
- pin
- recess
- 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.)
- Pending
Links
- 238000011161 development Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H57/082—Planet carriers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0467—Elements of gearings to be lubricated, cooled or heated
- F16H57/0479—Gears or bearings on planet carriers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2361/00—Apparatus or articles in engineering in general
- F16C2361/61—Toothed gear systems, e.g. support of pinion shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H2057/085—Bearings for orbital gears
Definitions
- the invention relates to an arrangement according to the preamble of claim 1.
- thrust washers are known from the prior art. These can be used to mount the planet gears in a planetary gear.
- the thrust washers are fixed in the planet carrier.
- a bearing gap runs between a thrust washer and a planet gear. This is filled with lubricant, so that there is fluid friction under normal operating conditions. Fluid friction is almost free of wear. If the gear unit starts up or comes to a standstill, however, dry or mixed friction cannot be avoided. This goes hand in hand with increased wear.
- the wear is concentrated in areas of the thrust washer that are subjected to an increased load due to the force conditions prevailing in the planetary gear. In these areas, the risk of bearing damage is particularly high.
- the invention is based on the object of making available a thrust washer which does not have the disadvantages inherent in the solutions known from the prior art.
- the load capacity of the thrust washer should be increased and its service life extended.
- the arrangement has a thrust washer.
- a thrust washer is a intestinnför shaped axial slide bearing.
- a thrust washer usually has a hollow cylindrical basic shape.
- the basic shape is a straight, hollow circular cylinder.
- the basic shape of a body is the shape of an original body from which the first-named body is created by eliminating individual areas, for example by inserting recesses and / or by adding individual areas.
- the arrangement also has a first stop and a second stop.
- a stop is a means of limiting the mobility of a component in exactly one direction. The component can be moved in exactly one direction until it hits the stop. From there, the component can be moved back in the opposite direction.
- the first stop is accordingly a means for limiting the rotational mobility of the thrust washer in a first direction.
- the second stop is designed as a means for limiting the rotational mobility of the thrust washer in a second direction.
- the first direction and the second direction each characterize the direction of rotation of the thrust washer about the axis of rotation of a component, for example a gear or a planetary gear, which is rotatably supported by the thrust washer.
- the first direction and the second direction are opposite to each other.
- a first position in which the thrust washer strikes the first stop and a second position in which the thrust washer strikes the second stop differ with regard to a rotation of the thrust washer about the aforementioned axis of rotation.
- the thrust washer can be transferred between the first position and the second position by rotating about this axis of rotation.
- the thrust washer is transferred from the first position to the second position by rotating it in the second direction.
- the thrust washer is transferred from the second position to the first position by turning in the first direction.
- the inventive arrangement results in changing load situations, for example as a result of a reversal of the direction of rotation of a component rotatably mounted by means of the thrust washer, an alternating rotation of the thrust washer between the first stop and the second stop.
- the areas in which the thrust washer is exposed to increased loads “move” over the thrust washer.
- the wear on the thrust washer is more evenly distributed over its running or sliding surface. This prevents zones with locally increased wear from forming on the thrust washer. This increases the service life of the thrust washer and lowers the risk of failure due to wear.
- the arrangement according to the invention is particularly suitable for use in a transmission of a wind turbine.
- At least one planet gear is rotatably mounted by means of the thrust washer.
- the planetary gear is freely rotatable relative to the plane carrier and the thrust washer.
- a bearing gap which is preferably filled with lubricant, runs between the planet gear and the washer. The rotatability of the washer is limited relative to the planet carrier by the first and the second stop.
- the arrangement has at least one pin and at least one recess.
- the pin engages in the recess.
- the tenon and the recess are off-center, i.e. arranged spaced from the above axis of rotation.
- the recess is tangential, i.e. along an arc, around the axis of rotation.
- the arc of the circle is in a radial direction, i.e. arranged orthogonally to the axis of rotation plane.
- the center angle of the arc is less than 360 °.
- the central angle is preferably smaller than 90 °, in particular smaller than 45 °.
- the recess can be a groove or a continuous recess. Due to the off-center arrangement, the recess and the pin form the first and second stop.
- the thrust washer has the recess and can be rotated with respect to the pin.
- the planet carrier can form the pin, preferably in one piece.
- the arrangement can be developed in such a way that the thrust washer forms the pin and can be rotated with respect to the recess.
- the pin is preferably rigid, that is to say immovable or integrated into the thrust washer without the possibility of a relative movement.
- the thrust washer can form the pin in one piece.
- the planet carrier preferably has the recess.
- the first stop and the second stop can, in an alternative preferred development, be formed by a first and a second straight or flat surface.
- the thrust washer forms the first surface and is rotatable with respect to the second surface. If the arrangement is part of a planetary gear, the planet carrier preferably forms the second surface.
- the first surface and the second surface are radial with respect to the above-mentioned axis of rotation, i.e. arranged offset to one another along a straight line which runs orthogonally to the above-mentioned axis of rotation and intersects the axis of rotation. Furthermore, the first surface and the second surface are directed towards one another, so that a gap runs between the first surface and the second surface.
- the gap enables a rotation of the first surface and the second surface relative to one another and thus a rotation of the thrust washer. But since the surfaces are straight, they come into contact with one another as a result of the twist. This limits the rotation of the thrust washer.
- the thrust washer 101 shown in FIG. 1 has an annular running surface 103.
- the thrust washer 101 has a circular basic shape in each ver parallel to the image plane of FIG. 1 running cross section.
- the running surface has a circular basic shape.
- Each recess 104 opens into a radially extending part of the surface of the thrust washer 101.
- a pin 201 engages in each of the recesses.
- the pins 201 are fixed in a planet carrier 203 and thus act as a rotation lock for the thrust washer 101.
- the thrust washer 101 can be rotated by a limited angular range relative to the planet carrier 203.
- the thrust washer 101 forms an axial sliding bearing for a planet gear 205, which is rotatably mounted on a planet pin 207. Load changes of the planetary gear 205 cause the thrust washer 101 - to the extent that the recesses 104 and the pins 201 allow this - to rotate. This prevents the wear on the thrust washer 101 from concentrating on a narrowly limited area.
- Figures 3a and 3b show an alternative embodiment.
- the anti-rotation lock of the thrust washer 101 is formed by straight surfaces.
- the thrust washer 101 has two flattenings 301 on its inner lateral surface, which are directed inwardly towards the axis of rotation of the planetary gear 205.
- the planet bolt 207 has two corresponding flat areas 303, which are accordingly directed outwards away from the axis of rotation. In each case a flat surface 301 of the thrust washer 101 and a flat surface 303 of the planet bolt 207 are opposite one another. If the thrust washer 101 is in the angular position shown in FIG. 3a, the flat surface 301 of the thrust washer 101 and the flat surface 303 of the planetary pin 207 run parallel to one another. A gap 305 extends between the flat surface 301 of the thrust washer 101 and the flat surface 303 of the planetary pin 207.
- the gap 305 enables the thrust washer 101 to be rotated.
- the flat surface 301 of the thrust washer 101 and the flat surface 303 of the planetary pin 207 come into contact. This is shown in Fig. 3b.
- the contact of the flat areas 301, 303 forms a stop which limits the rotatability of the thrust washer 101.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
- Sliding-Contact Bearings (AREA)
- General Details Of Gearings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019205087.5A DE102019205087A1 (en) | 2019-04-09 | 2019-04-09 | Pendulum thrust washer |
PCT/EP2020/055526 WO2020207666A1 (en) | 2019-04-09 | 2020-03-03 | Pivoting thrust washer |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3953614A1 true EP3953614A1 (en) | 2022-02-16 |
Family
ID=69804841
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20710834.1A Pending EP3953614A1 (en) | 2019-04-09 | 2020-03-03 | Pivoting thrust washer |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3953614A1 (en) |
CN (1) | CN113661348A (en) |
DE (1) | DE102019205087A1 (en) |
WO (1) | WO2020207666A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022133429A1 (en) | 2022-12-15 | 2024-06-20 | Schaeffler Technologies AG & Co. KG | Planetary gear |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1177421B (en) * | 1960-03-08 | 1964-09-03 | Karl Schmidt Ges Mit Beschraen | Ring-shaped bearing body of a hydrodynamic thrust bearing for clockwise and counter-clockwise rotating journal |
DE1986278U (en) * | 1962-11-15 | 1968-05-30 | Schmidt Gmbh Karl | SECURITY FOR THROTTLE DISCS IN AXIAL PLAIN BEARINGS. |
KR19980037005U (en) * | 1996-12-17 | 1998-09-15 | 박병재 | Planetary Gear Sets for Automatic Transmissions |
DE19856351C1 (en) * | 1998-12-07 | 2000-04-13 | Bosch Gmbh Robert | Radial piston pump has axial bearing plate retained in housing by circlip and positioning lugs |
DE19954636A1 (en) * | 1999-11-13 | 2001-05-17 | Zahnradfabrik Friedrichshafen | Planetary gear |
JP2001173670A (en) * | 1999-12-20 | 2001-06-26 | Hitachi Constr Mach Co Ltd | Bearing device |
DE10203265A1 (en) * | 2002-01-29 | 2003-07-31 | Ina Schaeffler Kg | Thrust washer of a planetary gear |
DE10243555B4 (en) * | 2002-09-19 | 2005-08-25 | OCé PRINTING SYSTEMS GMBH | Flange for a belt transporting a belt |
DE102005004488A1 (en) * | 2005-02-01 | 2006-08-10 | Zf Friedrichshafen Ag | planetary gear |
KR100692753B1 (en) * | 2005-11-21 | 2007-03-09 | 현대자동차주식회사 | Washer and planetary gear sets having the washer |
DE102008000279A1 (en) * | 2008-02-12 | 2009-08-13 | Zf Friedrichshafen Ag | Thrust washer for planet gears of a planetary gear |
WO2012029116A1 (en) * | 2010-08-31 | 2012-03-08 | 三菱重工業株式会社 | Planetary gear mechanism and wind-powered power generation device |
DE102016219008A1 (en) * | 2016-09-30 | 2018-04-05 | Flender Gmbh | Planetary gear with thrust washers |
-
2019
- 2019-04-09 DE DE102019205087.5A patent/DE102019205087A1/en active Pending
-
2020
- 2020-03-03 EP EP20710834.1A patent/EP3953614A1/en active Pending
- 2020-03-03 WO PCT/EP2020/055526 patent/WO2020207666A1/en active Search and Examination
- 2020-03-03 CN CN202080027338.XA patent/CN113661348A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
CN113661348A (en) | 2021-11-16 |
WO2020207666A1 (en) | 2020-10-15 |
DE102019205087A1 (en) | 2020-10-15 |
US20220145930A1 (en) | 2022-05-12 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 20210915 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
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DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
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17Q | First examination report despatched |
Effective date: 20240528 |