EP2638257A1 - Getriebeeinrichtung und nockenwellenversteller mit einer solchen getriebeeinrichtung - Google Patents
Getriebeeinrichtung und nockenwellenversteller mit einer solchen getriebeeinrichtungInfo
- Publication number
- EP2638257A1 EP2638257A1 EP11748924.5A EP11748924A EP2638257A1 EP 2638257 A1 EP2638257 A1 EP 2638257A1 EP 11748924 A EP11748924 A EP 11748924A EP 2638257 A1 EP2638257 A1 EP 2638257A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stop
- transmission device
- drive unit
- output unit
- unit
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/352—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using bevel or epicyclic gear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
- F01L1/16—Silencing impact; Reducing wear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
- F01L2001/34453—Locking means between driving and driven members
- F01L2001/34476—Restrict range locking means
Definitions
- the invention relates to a transmission device, in particular for a motor vehicle.
- the invention further relates to a camshaft adjuster with such a transmission device.
- electro-mechanical camshaft adjustment systems are known from the prior art.
- three-shaft transmissions are commonly used in which a first shaft of the transmission, usually the camshaft, is connected to a second shaft (camshaft sprocket) of an internal combustion engine.
- the engine crankshaft is operatively connected to the camshaft via the camshaft sprocket.
- the mechanism for connecting the crankshaft to the Nockenwellenkettenrad forms an actuator in a three-shaft transmission.
- a third shaft, the adjusting shaft is connected to an actuator (often an electrical adjustment motor).
- the adjusting shaft serves to adjust the relative angular position between the camshaft and crankshaft during operation of the internal combustion engine.
- three-shaft transmissions are swashplate transmissions and internal eccentric transmissions, which are described in WO 2006/018080. These also include the shaft gears known from WO 2005/080757 and the transmissions contained in US 2007/0051332 A1 and US 2003/0226534 A1.
- actuators in such three-shaft systems are often electric motors for adjusting the adjusting used.
- electrical, mechanical or hydraulic brakes or rotationally or linearly acting electromagnets, or solenoid valves in the case of hydraulic adjustment systems in order to enable phase adjustment.
- the camshaft phaser comprises a sprocket which is operatively connected to a crankshaft via a chain.
- the sprocket thus represents a drive wheel, by means of which a camshaft, which is the output shaft, is driven.
- a stop disc is arranged rotatably.
- the stop disc has a cutout defining a limit of the adjustment.
- the section has angularly spaced apart an early stop and a late stop.
- a stop lug is provided, which is arranged such that the sprocket and the stop plate between the stops can be rotated relative to each other.
- the camshaft can be rotated via an actuating shaft within an adjustment range, which is defined by the distance or the angle between the stop lug and one of the stops.
- the control shaft is driven by an electric motor. During this time, the sprocket and thus the crankshaft seem to stand still.
- a disadvantage of this design is that the stop elements, ie the cutout and the stop lug must be sufficiently dimensioned to withstand the load when reaching the angle limit in normal operation and collision-like states in consequence control errors.
- the stop elements which are axially offset from the actuator, therefore, a certain axial space is required. This leads to an increase in the weight of the transmission device.
- more parts and / or more work steps are required in the production of the transmission device.
- a drive unit and a driven unit of the transmission device must be made smaller, which entails disadvantages in terms of functions and life of the transmission device.
- the invention has for its object to arrange the stop elements of a transmission device without function restriction such that the space required for the transmission device axial space is reduced.
- a transmission device in particular for a motor vehicle, comprising a drive unit, an output unit and an adjusting unit via which a phase position of the Ab- drive unit relative to the drive unit is variable, wherein a sliding bearing between an inner circumferential surface of the drive unit and an outer circumferential surface the output unit is formed, so that the drive unit is rotatably mounted on the output unit and wherein the inner lateral surface of the drive unit and the outer surface of the output unit are designed to form stop elements for limiting the angle when changing the phase position segmented and engage in a form-fitting manner.
- the object is further achieved according to the invention by a camshaft lenversteller with such a transmission device.
- the advantages and preferred embodiments listed below with regard to the transmission device are to be transferred analogously to the camshaft adjuster.
- the output unit is rotated via the adjusting unit relative to the drive unit.
- the drive unit is usually rotatably mounted on one of the camshaft near continuation of the output unit.
- the area of the bearing between the drive unit and the output unit is designed as a sliding bearing, wherein an outer lateral surface of the output unit slides on an inner lateral surface of the drive unit. These lateral surfaces are smooth in the prior art round and have only minor interruptions, for example, to supply the sliding bearing with lubricating oil.
- the invention is based on the idea to use the area of the slide bearing for accommodating the stop elements, whereby the axial space for the adjustment is shortened.
- the slide bearing must be sufficiently stable in terms of its dimensions according to the external load, therefore, a large bearing width in the axial direction is desirable.
- the generous dimensioning of the slide bearing therefore offers the possibility of forming the stop elements on the lateral surfaces between which the slide bearing takes place, with the remaining lateral surface remaining sufficiently large in accordance with the bearing capacity of the bearing.
- the drive unit comprises a drive ring gear and the inner circumferential surface is that of the ring gear.
- a sprocket of the drive unit is firmly connected to a drive ring gear, for example via a welded or screwed connection.
- the outer circumferential surface of the output unit, which slides on the inner circumferential surface of the drive ring gear, in particular by an output ring is formed, which is also a ring gear and is indirectly connected to the camshaft.
- at least one pocket is formed on one of the lateral surface and a radially projecting stop lug is formed on the other lateral surface.
- three such pockets are provided on one of the lateral surfaces and on the other lateral surface are correspondingly formed three stop lugs.
- stop lugs may alternatively be provided, for example, pins that reach into the pockets. Due to the multiple design of the stop elements, ie the pockets and the stop lugs, the force to which they are subjected during the stop is divided proportionally. Thus, each of the stop elements can be made relatively small and still the outer load is sufficiently stable.
- the pockets cover an angular range of about 40 ° to 70 °, in particular of 60 °.
- the width of the stop lugs viewed in the circumferential direction is about 3 to 4 times smaller than the width of the pockets.
- the stop elements can extend continuously over the entire axial width of the sliding bearing. With regard to a particularly viable structure of the drive and output unit, however, the stop elements extend in the axial direction preferably over a part of the sliding bearing, so that sufficient space for the slide bearing is present. Alternatively, the pockets may extend throughout the entire width of the journal bearing while the stopper tabs are axial, e.g. only half as wide as the bags.
- a solid lubricant is provided in the region of the sliding bearing.
- the slide bearing is solid lubricated over the transmission life in order to avoid possible restrictions in the adjustment speed by jammed lubricating oil.
- solid lubricants such as grease or graphite are introduced into a porous surface in the area of the lateral surfaces, which porous surface is usual with sintered metals.
- means for forming a stop damping for the stop elements are provided.
- the stop damping is eg mechanical or hydraulic.
- the stop damping is a hydraulic stop damping with a hydraulic damping means.
- the hydraulic damping means is in particular a lubricating oil, which is used for lubricating the sliding lateral surfaces in the region of the slide bearing.
- the oil transported to the sliding bearing for lubrication by centrifugal force or special oil ducts collects in the pockets and is jammed and compressed between the stop lugs and the respective stop surface at a certain angle, which defines a brake window.
- the side surfaces of the pockets are largely closed or tapered depending on the angle to the stop.
- the oil drain is throttled down and compressed to the outflow through leakage gaps. It forms an oil pad, which catches the stop lug softly in the attack.
- the adjustment speed is strongly braked before the actual mechanical stop, so that the load of the stop elements is minimized by the damping.
- a transmission device comprising a drive unit and an output unit which are rotatable relative to each other, wherein a pocket and a stop lug are provided as stop elements for limiting the angle when changing a phase position to each other, which are assigned to the two units, wherein in the vicinity of a stop surface the pocket is provided with a radial relief bore and the relief bore is open to a hydraulic damping means of hydraulic stop damping when a stop lug abutting radially recessed region is positioned over the relief bore.
- the stop lugs on the drive unit and the pockets on the output unit this means that the discharge hole behind a web, which forms the stop surface of the pocket is arranged.
- the relief bore extends radially over the entire width of the output unit. The relief bore is provided for allowing the hydraulic damping means of the rebound damping to flow out of the pocket during the brake window so that the stop lug comes into direct contact with the abutment surface.
- the stop lug protrudes radially inward and laterally of the stop lug, the region of the drive unit is formed with an enlarged radial depth, so that in this area, a gap between the drive and the output unit is formed when the stop lug rests on the stop surface.
- the hydraulic damping means which is eg a lubricating oil, can be removed from the pocket.
- the hydraulic damping means can flow out of the bag, u.a. from the arrangement of the relief hole with respect to the radially recessed area.
- the radially recessed area expediently reaches the relief bore if an angle of approximately 3 ° to 5 ° is set between the stop surface in the vicinity of the relief bore and a side of the stop nose facing the stop surface.
- FIG. 1 shows a longitudinal section of a transmission device
- Fig. 2 is an enlargement of a sliding bearing of the transmission device according to FIG.
- FIG. 3 is a cross-sectional view of a plain bearing with integrated stop elements according to a first embodiment
- Fig. 4 is a plain bearing with integrated stop elements according to a second
- FIG. 5 is a perspective view of a drive wheel formed on an inner circumferential surface pockets
- FIG. 8 - 1 an enlargement of the detail I of FIG. 6 in four different angular positions.
- Like reference numerals have the same meaning in the various figures.
- a camshaft adjuster 1 is shown, in which a transmission device 2 is installed according to the principle of the 3-shaft transmission.
- the transmission device 2 comprises a drive unit 4, which is a sprocket 6, which is a drive wheel, and a drive ring gear 8 includes, which are firmly connected to each other and thus form a functional unit.
- the output device 12 has an output disk 14 and an output ring 16, which is likewise a ring gear and is fixedly connected to the camshaft 10 via the output disk 14.
- the drive unit 4 and the output unit 12 together form a gear 18, which is adjusted via an actuator, in the illustrated embodiment, an electric adjusting motor 20 of an adjustment unit 22.
- the adjustment unit 22 is part of the transmission device 2, so the 3-shaft transmission.
- the adjusting unit 22 is driven by an adjusting shaft 24 from the adjusting motor 20.
- the adjusting motor 20 is fixedly mounted on a cylinder head 26 in the embodiment shown.
- the output unit 12 is rotated to change the phase position relative to the drive unit 4 at a fixed drive unit 4, so that the relative angle between the drive unit 4 and the output unit 12 is adjusted.
- the output ring 16 slides on the drive ring gear 8, so that in this area a slide ring is formed, which is indicated in the enlargement of FIG. 2 by the reference numeral 28.
- the sliding ring 28 is formed between an inner circumferential surface 30 of the drive unit 4 and an outer circumferential surface 32 of the output unit 12.
- a lubricant is provided between the two lateral surfaces 30, 32, in particular an oil, wherein there is sufficient sliding bearing play in the axial and radial directions.
- the embodiment of the sliding bearing 28 according to FIG. 4 differs from that shown in FIG. 3 only in that the stop lugs 36 on the drive side and the pockets 34 are formed on the output side.
- the stop elements 34, 36, the sliding bearing 28 is located radially further out than the attachment points.
- the pockets 34 and stop tabs 36 may extend throughout the entire axial width of the slide bearing 28. As can be seen from FIG. 5, however, the pockets 34 can represent partial recesses on the inner circumferential surface 30 of the drive unit 4.
- the pocket 34 in FIG. 5 is delimited in the circumferential direction by a remaining bearing web 40 whose surface facing the pocket 34 forms the abutment surface 38.
- a hydraulic stop damping is additionally provided, in which a lubricating oil for the slide bearing 28 forms a lubricant oil between the stop lug 36 and the stop surface 38.
- the lubricating oil flows through the gaps in the region of the thrust bearing between the side surfaces of the output ring 16 and the drive piston 8 and between the side surfaces of the output ring 16 and the sprocket 6, which is indicated in Fig. 8 by arrows.
- a web 48 is formed, which sweeps over an angle range between 3 ° and 5 °.
- the region 46 of the inner lateral surface 30 adjoining the stop lug 36 has an enlarged radial depth than the inner lateral surface 30 on the side of the stop lug 36 facing away from the relief bore 44 or in the region of the sliding bearing 28.
- the relief bore 44 is fluidically connected to the pocket 34 so that the lubricating oil can be expressed when an angle between 3 ° and between the stop face 38 and a stop face 38 facing side of the stop lug 36 5 ° is set.
- an axial flow control of the damping means would be possible, in particular by axial recesses in the side surfaces or by axial bores.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201010050814 DE102010050814A1 (de) | 2010-11-09 | 2010-11-09 | Getriebeeinrichtung und Nockenwellenversteller mit einer solchen Getriebeeinrichtung |
| PCT/EP2011/064360 WO2012062491A1 (de) | 2010-11-09 | 2011-08-22 | Getriebeeinrichtung und nockenwellenversteller mit einer solchen getriebeeinrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2638257A1 true EP2638257A1 (de) | 2013-09-18 |
| EP2638257B1 EP2638257B1 (de) | 2014-07-16 |
Family
ID=44512889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11748924.5A Active EP2638257B1 (de) | 2010-11-09 | 2011-08-22 | Getriebeeinrichtung und nockenwellenversteller mit einer solchen getriebeeinrichtung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2638257B1 (de) |
| DE (1) | DE102010050814A1 (de) |
| WO (1) | WO2012062491A1 (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017128423A1 (de) | 2017-11-30 | 2019-06-06 | Schaeffler Technologies AG & Co. KG | Wellgetriebe |
| WO2020103971A1 (de) | 2018-11-19 | 2020-05-28 | Schaeffler Technologies AG & Co. KG | Wellgetriebe und herstellung eines wellgetriebes |
| US11905862B2 (en) | 2020-07-27 | 2024-02-20 | Schaeffler Technologies AG & Co. KG | Gear device, camshaft adjuster having the gear device, and internal combustion engine |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013217017A1 (de) | 2013-08-27 | 2015-03-05 | Schaeffler Technologies Gmbh & Co. Kg | Mehrteiliger Rotor für einen hydraulischen Nockenwellenversteller mit Ölversorgung der Druckkammern durch die Flügel |
| DE102015217291A1 (de) * | 2015-09-10 | 2016-10-20 | Schaeffler Technologies AG & Co. KG | Nockenwellenversteller |
| DE102015217559A1 (de) | 2015-09-15 | 2017-03-16 | Schaeffler Technologies AG & Co. KG | Stellgetriebe |
| WO2017206988A1 (de) | 2016-05-31 | 2017-12-07 | Schaeffler Technologies AG & Co. KG | Stellgetriebe |
| DE102017111223B3 (de) | 2017-05-23 | 2018-09-13 | Schaeffler Technologies AG & Co. KG | Nockenwellenversteller |
| DE102017112032B4 (de) | 2017-06-01 | 2020-08-13 | Schaeffler Technologies AG & Co. KG | Dreiwellengetriebe |
| DE102017128731B4 (de) * | 2017-12-04 | 2021-12-09 | Schaeffler Technologies AG & Co. KG | Elektrischer Nockenwellenversteller zur variablen Ventilsteuerung in einer Brennkraftmaschine |
| DE102021114625B4 (de) | 2021-06-08 | 2023-07-06 | Schaeffler Technologies AG & Co. KG | Stellgetriebe und Verfahren zur Montage eines Stellgetriebes eines elektromechanischen Nockenwellenverstellers |
| DE102024111480A1 (de) * | 2024-04-24 | 2025-10-30 | Schaeffler Technologies AG & Co. KG | Dreiwellengetriebe und Nockenwellenversteller |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3986371B2 (ja) | 2002-06-07 | 2007-10-03 | 株式会社日立製作所 | 内燃機関のバルブタイミング制御装置 |
| DE102004009128A1 (de) | 2004-02-25 | 2005-09-15 | Ina-Schaeffler Kg | Elektrischer Nockenwellenversteller |
| DE102004038681B4 (de) | 2004-08-10 | 2017-06-01 | Schaeffler Technologies AG & Co. KG | Elektromotorischer Nockenwellenversteller |
| JP4390078B2 (ja) | 2005-09-05 | 2009-12-24 | 株式会社デンソー | バルブタイミング調整装置 |
| JP2007239665A (ja) * | 2006-03-09 | 2007-09-20 | Denso Corp | バルブタイミング調整装置 |
| JP4600379B2 (ja) * | 2006-10-06 | 2010-12-15 | 株式会社デンソー | バルブタイミング調整装置 |
| JP4952653B2 (ja) * | 2007-06-04 | 2012-06-13 | 株式会社デンソー | バルブタイミング調整装置 |
| DE102008039008A1 (de) | 2008-08-21 | 2010-02-25 | Schaeffler Kg | Verfahren zur Verstellung einer Nockenwelle eines Verbrennungsmotors, Nockenwellenverstellsystem und Verbrennungsmotor mit verstellbarer Nockenwelle |
-
2010
- 2010-11-09 DE DE201010050814 patent/DE102010050814A1/de not_active Withdrawn
-
2011
- 2011-08-22 WO PCT/EP2011/064360 patent/WO2012062491A1/de not_active Ceased
- 2011-08-22 EP EP11748924.5A patent/EP2638257B1/de active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2012062491A1 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017128423A1 (de) | 2017-11-30 | 2019-06-06 | Schaeffler Technologies AG & Co. KG | Wellgetriebe |
| WO2020103971A1 (de) | 2018-11-19 | 2020-05-28 | Schaeffler Technologies AG & Co. KG | Wellgetriebe und herstellung eines wellgetriebes |
| US11905862B2 (en) | 2020-07-27 | 2024-02-20 | Schaeffler Technologies AG & Co. KG | Gear device, camshaft adjuster having the gear device, and internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012062491A1 (de) | 2012-05-18 |
| DE102010050814A1 (de) | 2012-05-10 |
| EP2638257B1 (de) | 2014-07-16 |
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