EP4409162A1 - Getriebeanordnung - Google Patents
GetriebeanordnungInfo
- Publication number
- EP4409162A1 EP4409162A1 EP22777231.6A EP22777231A EP4409162A1 EP 4409162 A1 EP4409162 A1 EP 4409162A1 EP 22777231 A EP22777231 A EP 22777231A EP 4409162 A1 EP4409162 A1 EP 4409162A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- force
- transmitting element
- shaft
- transmission arrangement
- inner peripheral
- 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
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
- F16H57/0018—Shaft assemblies for gearings
- F16H57/0025—Shaft assemblies for gearings with gearing elements rigidly connected to a shaft, e.g. securing gears or pulleys by specially adapted splines, keys or methods
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/064—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable
- F16D1/072—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable involving plastic deformation
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/076—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end by clamping together two faces perpendicular to the axis of rotation, e.g. with bolted flanges
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
- F16D1/0852—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft
- F16D1/0858—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft due to the elasticity of the hub (including shrink fits)
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
- F16D1/09—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces
- F16D1/092—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces the pair of conical mating surfaces being provided on the coupled hub and shaft
-
- 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
Definitions
- the present invention relates to a gear assembly according to the preamble of patent claim 1.
- the present invention also relates to a method for producing such a gear assembly according to the preamble of patent claim 8.
- Gear assemblies such as high-precision gear assemblies such as planetary gears, can have various power-transmitting elements. These can be gears, such as planets. In order to transmit a torque from one force-transmitting element to another, these can be connected to one another, as is the case, for example, with the planets of a double planet.
- the connection of a first and a second force-transmitting element in such a transmission arrangement must be designed in such a way that a high torque can be transmitted, but at the same time the force-transmitting elements are not negatively influenced.
- Such a high torque can, for example, lead to high hoop stresses and thus to cracks in the force-transmitting elements, in particular in the roots of gear wheels.
- a connection of two power-transmitting elements must be very stiff in the torsional direction in order to be able to be used in a high-precision gearbox.
- Previously used connections of two force-transmitting elements in a transmission arrangement are designed in such a way that either the force-transmitting elements become very expensive, for example due to the material used, or the diameter of the force-transmitting elements must be increased for such a connection, whereby more space is required in the gear assembly and this is thereby larger.
- connection between force-transmitting elements can be produced by a radial press fit, welding, etc.
- welding is expensive and has a thermal impact on the elements, which can lead to a change in material properties.
- An interference fit across the radial surface requires a large diameter of the force transmitting elements for high torques, at the same time limitations in the hoop stresses on the outer diameter of a hub portion of the gear assembly must be considered, which in turn results in a lower rigidity in the direction of rotation.
- An interference fit over the axial face i.e. as a bolt-to-flange connection, in turn requires a large diameter for bolts.
- Keyed connections across the radial or axial face are expensive and do not allow relative movement between the connected parts during assembly. Another possibility is to glue the force-transmitting elements, but this only provides a low connection strength.
- the transmission arrangement has at least a first and a second force-transmitting element, which are arranged coaxially on a shaft and are designed to transmit torque.
- the gear arrangement can in particular be a high-precision gear.
- the first and second power transmitting elements can be any type of power transmitting element coaxially arranged on a shaft, such as gears.
- the force-transmitting elements can be the two planets of a double planet in a planetary gear.
- the first and the second force-transmitting element each have an inner peripheral surface. The second force-transmitting element is pushed onto the shaft with the inner peripheral surface and is coupled to the shaft via a radial fit.
- the first force-transmitting element can be formed separately from the shaft and, like the second force-transmitting element, can be pushed onto the shaft with an inner peripheral surface and coupled to it via a radial fit.
- the first force-transmitting element can be formed integrally with the shaft.
- the second force-transmitting element is thus also slid onto the first force-transmitting element when it is pushed onto the shaft.
- the shaft can be designed as a mushroom shaft or bell-shaped shaft.
- the radial fit can be designed as a press fit, which is achieved, for example, by an oversize between the inner peripheral surfaces of the first and/or the second force-transmitting element with the shaft.
- the radial fit can also be designed as a loose fit.
- the first and/or the second force-transmitting element can be fastened to the shaft by a material connection, for example by using adhesive or the like.
- the first force-transmitting element is additionally coupled to the second force-transmitting element on a respective contact surface adjoining one another in the axial direction via an axial frictional connection.
- This means that the connection between the first and the second force-transmitting element is produced both via a radial fit with the shaft and via an axial frictional connection with one another.
- This connection is suitable for transmitting a torque via the axial surface between the two force-transmitting elements and, depending on the design of the radial fit, also via the radial surface with the shaft.
- first and the second force-transmitting element can be connected to one another via a fastening element.
- the fastening element can be, for example, a stop ring, a nut, a groove nut, a bolt, a flange or the like or a combination thereof, which are suitable for fastening the first and the second force-transmitting element to one another.
- the abutting contact surfaces of the first and second force-transmitting elements in the axial direction which are coupled via an axial frictional connection, transmit a torque and allow the torsional rigidity to be determined either only by the radial inner circumferential surface or only by the axial contact surfaces, or that the Torsional stiffness is determined both by the radial inner peripheral surface and the axial contact surfaces.
- a diameter of the force-transmitting elements that can transmit a large torque can preferably be selected here.
- connection between the first and the second force-transmitting element with each other and with the shaft is generated without heat, i. H. not by welding or the like, but by fitting and frictional locking, so the material properties of the individual elements are not adversely affected. Furthermore, the connection between the first and second force-transmitting elements and with the shaft during assembly can be created solely by positioning the elements to one another and assembling them, without the elements of the gear assembly being transported to another processing device, such as a welding station or similar, must be forwarded. Thus, the production of the gear assembly can be simplified and is more economical compared to previous gear assemblies.
- friction-increasing agents can in particular have any surface actions that increase the coefficient of friction.
- Such friction-increasing agents can have, for example, a friction-increasing layer, eg an adhesive layer or a zinc layer, or friction-increasing particles, eg particles that are harder than the material of the force-transmitting elements, or a combination thereof.
- the inner peripheral surface of the first and/or the second force-transmitting element are conical surfaces.
- the corresponding surface of the shaft which is provided either as a separate element or as an integral element of the first force-transmitting element, can also be conical.
- Such conical surfaces simplify in particular the pushing of the respective force-transmitting element onto the shaft, in particular in the case of a press fit.
- the inner peripheral surfaces of the first and/or the second force-transmitting element can be cylindrical surfaces.
- a combination of conical surfaces and cylindrical surfaces is also possible, in which case the inner peripheral surface of the first force-transmitting element can be a conical surface and the inner peripheral surface of the second force-transmitting element can be a cylindrical surface, or vice versa.
- a cylindrical surface also allows the radial fit to be designed as a transition or clearance fit, so that the proportion of force or torque transmission can gradually be transferred to the axial frictional connection up to 100%.
- Such a loose fit can be fixed by an adhesive.
- a force-exerting means can be provided which is designed to apply an axial force to the first and/or the second force-transmitting element, which is axially directed in the direction of the Contact surfaces between the first and the second force-transmitting element acts. This force is used to create the frictional connection between the first and the second force-transmitting element.
- the force-exerting element can also serve as a fastener, as described above, to maintain the axial force.
- the force exerting means can be any type of means that serves to exert and/or maintain the force hold.
- the force-applying means may be a stop ring, nut, locknut, bolt, or the like, or a combination thereof. Furthermore, it is also possible to first exert a force on the two force-transmitting elements and then to connect the two force-transmitting elements to one another in this state by means of flanging or the like, in which case the force-exerting means is the flanging.
- a method for producing a transmission arrangement as described above has the following steps: applying the first and the second force-transmitting element to the shaft, in particular by exerting an axial force in the direction of the axial contact surfaces, joining the first and the second force-transmitting element to the shaft by means of a radial fit, and frictionally connecting the first force-transmitting element with the second force-transmitting element on the contact surfaces via an axial frictional connection.
- the axial force can be used both to join the first and the second force-transmitting element to the shaft and to generate the axial frictional connection.
- This axial force can, for example, press the second force-transmitting element onto a cylindrical or conical area of the first force-transmitting element, which represents the shaft.
- the axial force can press both the first and the second force-transmitting element onto the shaft.
- the radial fit can be designed as a press fit, for example due to an oversize between the inner peripheral surfaces and the shaft. In the end position of the first and the second force-transmitting element, the respective contact surfaces of the elements touch. This in turn creates the axial frictional connection. Both the radial fit and the axial friction now transfer a torque load between the first and the second force-transmitting element.
- the method further includes twisting the first force-transmitting element with respect to the second force-transmitting element after assembly and before frictionally connecting the first and second force-transmitting elements by the axial frictional engagement.
- twisting the first force-transmitting element with respect to the second force-transmitting element after assembly and before frictionally connecting the first and second force-transmitting elements by the axial frictional engagement.
- the frictional connection between the two elements does not yet exist, it is possible to rotate the force-transmitting elements around their axis.
- they can be positioned to each other in any desired angular position. For example, this can reduce play between the toothing of planets of a double planet and a hollow shaft and/or a sun in a planetary gear.
- FIG. 1a shows a schematic sectional view of a transmission arrangement with a first and a second force-transmitting element according to a first embodiment
- 1b a schematic sectional view of a transmission arrangement with a first and a second force-transmitting element according to a second embodiment
- FIG. 2a a schematic sectional view of a transmission arrangement with a first and a second force-transmitting element according to a third embodiment
- FIG. 2b a schematic sectional view of a transmission arrangement with a first and a second force-transmitting element according to a fourth embodiment.
- Figures 1a, 1b, 2a, 2b show a transmission arrangement 1, which has a first force-transmitting element 2 and a second force-transmitting element 4.
- the two force-transmitting elements 2, 4 can be, for example, two planets of a double planet.
- the two force-transmitting elements 2, 4 are arranged coaxially on a shaft 6 with an axis of rotation X.
- the first force-transmitting element 2 is formed integrally with the shaft 6 and can represent a mushroom-shaped shaft, for example.
- the first force-transmitting element 2 is designed as a separate element from the shaft 6 in the embodiments shown in FIGS. 2a and 2b.
- the first force-transmitting element 2 and the second force-transmitting element 4 are connected not only to the shaft 6 but also to one another.
- the second force-transmitting element 4 is first pushed onto the shaft 6 or the part of the first force-transmitting element 2 forming the shaft 6 .
- the radial fit can preferably be a press fit, although a loose fit is also possible.
- This inner peripheral surface 8, 8' can be realized either as a cylindrical inner peripheral surface 8', as shown in FIG. 1a, or as a conical inner peripheral surface 8, as shown in FIG. 1b.
- the corresponding surface of the shaft 6 has a shape complementary thereto.
- an axial force F1 now acts on the second force-transmitting element 4 , this is pressed on a contact surface 10 against a corresponding contact surface 10 of the first force-transmitting element 2 .
- a frictional connection between the two elements 2, 4 is achieved.
- the axial force F1 can be maintained during operation by suitable force-exerting means, such as a slotted nut or the like (not shown).
- M1 represents a radial force or torque path
- M2 represents an axial force or torque path.
- the main force or torque transmission takes place on the contact surfaces 10 via the path M2.
- the first force-transmitting element 2 can also be designed as an element separate from the shaft 6, as shown in FIGS. 2a and 2b.
- the first force-transmitting element 2 like the force-transmitting element 4, is pushed onto the shaft 6 by means of a fit, e.g. a press fit, on the inner peripheral surfaces 12, 12'.
- a fit e.g. a press fit
- these can be designed as a conical inner peripheral surface 12 (FIG. 2a) or as a cylindrical inner peripheral surface 12' (FIG. 2b).
- the frictional connection between the first and the second force-transmitting element 2, 4 on the contact surfaces 10 is achieved by axially acting forces F1, F2, which act on the two force-transmitting elements 2, 4 from both axial sides.
- the axial forces F1, F2 can be maintained during operation by appropriate force-exerting means.
- the transmission arrangement described above makes it possible to provide a simple and stable connection between a first and a second force-transmitting element, in which an axial and preferably also a radial force transmission path is made possible. This in turn means that the individual parts of the gear assembly are not overloaded and thus increases the service life of the gear assembly.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021211021.5A DE102021211021A1 (de) | 2021-09-30 | 2021-09-30 | Getriebeanordnung |
| PCT/EP2022/075925 WO2023052169A1 (de) | 2021-09-30 | 2022-09-19 | Getriebeanordnung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4409162A1 true EP4409162A1 (de) | 2024-08-07 |
Family
ID=83447921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22777231.6A Pending EP4409162A1 (de) | 2021-09-30 | 2022-09-19 | Getriebeanordnung |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240418252A1 (de) |
| EP (1) | EP4409162A1 (de) |
| CN (1) | CN118043574A (de) |
| DE (1) | DE102021211021A1 (de) |
| WO (1) | WO2023052169A1 (de) |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1200810A (en) * | 1968-05-15 | 1970-08-05 | Automotive Prod Co Ltd | Improvements in or relating to gear wheel assemblies |
| DE4141818C2 (de) * | 1991-12-18 | 1995-05-04 | Roland Man Druckmasch | Vorrichtungen zum Klemmen und Spannen |
| DE4204814A1 (de) * | 1992-02-18 | 1993-08-19 | Zahnradfabrik Friedrichshafen | Klebeverbindung, insbesondere eine drehfeste verbindung zweier zahnraeder mit einer welle |
| JP4427700B2 (ja) * | 2000-09-13 | 2010-03-10 | アイシン・エィ・ダブリュ株式会社 | ハイブリッド駆動装置 |
| DE10319629A1 (de) * | 2003-05-02 | 2004-11-18 | Zf Friedrichshafen Ag | Welle-Nabe-Verbindung |
| DE102006052104A1 (de) * | 2006-11-04 | 2008-05-08 | Zf Friedrichshafen Ag | Welle-Zahnrad-Verbindung |
| US8662785B2 (en) * | 2006-11-04 | 2014-03-04 | Zf Friedrichshafen Ag | Shaft-gear connection |
| DE102011079695A1 (de) * | 2011-07-25 | 2013-01-31 | Zf Friedrichshafen Ag | Zahnrad, insbesondere Planetenrad für ein Planetengetriebe und Drehschwingungsdämpfungsanordnung mit einem derartigen Zahnrad |
| DE102012009362B4 (de) * | 2012-05-10 | 2021-11-11 | Zf Friedrichshafen Ag | Optimiertes Generatorgetriebe einer Windkraftanlage |
| DE102014223505A1 (de) * | 2014-11-18 | 2016-05-19 | Zf Friedrichshafen Ag | Welle-Nabe-Verbindung eines Doppelzahnrades auf einer Getriebewelle |
| DE102016221705B4 (de) * | 2016-11-07 | 2018-05-17 | Schaeffler Technologies AG & Co. KG | Zahnrad aus einem Zahnradverbund und Verfahren zur Herstellung eines Zahnradverbundes |
| DE102016124126A1 (de) * | 2016-12-13 | 2018-06-14 | Schaeffler Technologies AG & Co. KG | Zahnradanordnung mit einer Überlastkupplung sowie elektromotorisch antreibbaren Antriebsstrang |
| DE102017111039A1 (de) * | 2017-05-22 | 2018-11-22 | Schaeffler Technologies AG & Co. KG | Mehrteiliges Zahnrad mit Welle-Nabe-Verbindung |
| DE102018108541B4 (de) * | 2018-01-24 | 2021-07-08 | Schaeffler Technologies AG & Co. KG | Antriebsstrangabschnitt, insbesondere für eine Getriebeanordnung für eine elektrisch antreibbare Achse eines Fahrzeugs, sowie die elektrisch antreibbare Achse |
| DE102018126153A1 (de) * | 2018-10-22 | 2019-10-24 | Schaeffler Technologies AG & Co. KG | Zahnradverbund für einen Stufenplaneten eines Planetengetriebes |
| DE102019123055A1 (de) * | 2018-11-26 | 2020-05-28 | Schaeffler Technologies AG & Co. KG | Zahnradverbund, insbesondere zur Bildung eines Mehrfach-Planetenrades |
| DE102018131103A1 (de) * | 2018-12-06 | 2020-04-02 | Schaeffler Technologies AG & Co. KG | Stufenplanetenrad mit zwei Teilplanetenrädern, Planetengetriebe mit Stufenplanetenrad sowie Verfahren zum Herstellen eines Stufenplanetenrads |
| DE102019121275B4 (de) * | 2019-08-07 | 2025-02-13 | Schaeffler Technologies AG & Co. KG | Getriebeanordnung |
-
2021
- 2021-09-30 DE DE102021211021.5A patent/DE102021211021A1/de active Pending
-
2022
- 2022-09-19 US US18/695,081 patent/US20240418252A1/en active Pending
- 2022-09-19 EP EP22777231.6A patent/EP4409162A1/de active Pending
- 2022-09-19 CN CN202280064490.4A patent/CN118043574A/zh active Pending
- 2022-09-19 WO PCT/EP2022/075925 patent/WO2023052169A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021211021A1 (de) | 2023-03-30 |
| US20240418252A1 (en) | 2024-12-19 |
| CN118043574A (zh) | 2024-05-14 |
| WO2023052169A1 (de) | 2023-04-06 |
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