EP1148211A2 - Ventildrehvorrichtung - Google Patents
Ventildrehvorrichtung Download PDFInfo
- Publication number
- EP1148211A2 EP1148211A2 EP01109652A EP01109652A EP1148211A2 EP 1148211 A2 EP1148211 A2 EP 1148211A2 EP 01109652 A EP01109652 A EP 01109652A EP 01109652 A EP01109652 A EP 01109652A EP 1148211 A2 EP1148211 A2 EP 1148211A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- base body
- cover
- spring
- ratchet ring
- 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
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 210000003746 feather Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Images
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
- F01L1/32—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for rotating lift valves, e.g. to diminish wear
Definitions
- the invention relates to a device for rotating a Valve of an internal combustion engine, during the Closing movement of the valve using a Basic body with a central conical bore and in it arranged valve cone pieces for power and positive connection with the valve stem and under Use of a valve spring cover with a Contact surface for the valve spring.
- Valve rotation device is the rotation of a valve enforced.
- Use the known valve rotators usually the axially acting rising Valve spring force when opening the valve to its Cause rotation. It is achieved that Valve rotates a few degrees during opening, however none during the closing movement Rotational movement performs more to an unnecessary Avoid wear on the valve itself.
- Valve turning devices have a high Operational reliability expected. With normal Operating conditions and appropriate maintenance with a service life of the turning devices in large engines of 10,000 hours and more. For engines that run briefly in the overload range and at one unsteady operation, the loads on the Rotating devices, however, quite considerably. Sensitive Components are due to their small dimensions the tangential springs for moving the balls in the sloping pockets. They are mentioned on the basis of dynamic overload which then becomes uncontrolled moving balls easily damaged or even completely destroyed. A damaged tangential spring leads to a Impairment of the function of the rotating device and in most cases directs their complete failure on.
- the known turning devices are based on the Principle, a rectilinear movement in a rotary movement convert. For all standard turning devices this conversion is achieved mechanically.
- the Parts suffer because of the large forces that occur a high wear or an early Material fatigue, so that the engine manufacturer desired downtimes are difficult to achieve.
- the disadvantage that the known turning devices technically complex and expensive are in the making.
- the invention has for its object to provide a device for rotating a valve mentioned in the introduction, the elements of which are subject to low wear and allow an increase in the service life of the rotating device.
- a simple construction should simplify production and make the entire rotating device cheaper.
- the invention solves this problem for a device mentioned in the introduction in that elements for transmitting the spring rotational movement occurring during the relief movement of the valve spring from the cover to the base body are arranged between the cover and the base body.
- the cover is preferably provided with a toothed ring which is concentric with the valve axis and has one-sided locking toothing, into which the toothing of a ratchet ring engages, which is positively connected to the base body, however, movable in the longitudinal direction of the valve.
- the base body can be supported on the cover via an axial bearing. It is also advantageous to arrange a needle bearing between the cover and the base body to absorb lateral forces. In order to prevent the ratchet ring from rotating relative to the base body, it can engage in axially directed grooves of the base body with parallel keys distributed over its circumference and thus remain axially movable. In order to prevent an unintentional lifting of the ratchet ring from the locking teeth of the cover, compression springs can be used between the base body and the ratchet ring, so that a constant engagement between the locking teeth is achieved.
- valve rotating device designed according to the invention does not use valve lift or valve spring force, to create a rotation derived from it. Rather, it is used when tensioning or relaxing a coil spring - here valve spring - associated Rotational movement that only with suitable mechanical Elements from the cover over the base body and the Valve plug pieces are led into the valve stem.
- the valve spring forces are transferred from Valve spring cover on the base body by a Axial bearing directed so that the locking teeth of Ratchet ring and cover not exposed to great forces are and the wear of these parts is kept very low can be. It is obvious that the ones used simple components making the whole Rotary device designed simply and inexpensively.
- the rotating device with the solution features of Invention consists of a valve spring cover 1 with a Contact surface 2 for the valve spring, not shown.
- the Base body 3 arranged coaxially to the cover 1 is provided with a conical bore 4 for not receiving provided valve cone pieces to a force-transmitting connection with the not shown To manufacture valve stem.
- a Rolling bearings arranged in the form of an axial ball bearing 5.
- the base body 3 is covered by a needle bearing 6 on the lid 1, so that the thrust bearing 5 through Lateral forces are not burdened.
- a ratchet ring 9 Arranged concentrically to the axial bearing 5, the upper side of the cover 1 facing away from the valve spring has a ring gear 7 with a locking toothing 8.
- the toothing of a ratchet ring 9 engages in the locking toothing, which is axially movable, but is secured against rotation against the base body 3.
- the securing is carried out on the circumference of the ratchet ring arranged feather keys 10 which engage in corresponding grooves 11 of the base body.
- compression springs 12 are distributed on the end face.
- the springs 12 have their abutments in bores 13 of the ratchet ring and in sleeves 14 which rest with their outer closed surfaces on the underside of a flange 15 of the base body.
- the compression spring 12 constantly ensures a sufficient engagement of the teeth of the locking teeth of the ratchet ring and valve spring cover by a slight preload.
- the entire device is covered by an oil protection cover 16 and secured by a conventional snap ring 17.
- a ring 18 on the underside of the cover 1 ensures a captive connection of the preassembled unit.
- a rocker arm presses with its pressure finger on the end of the valve stem end.
- the pressure force is communicated to the base body via the valve cone pieces.
- the axial forces introduced are denoted by F. They are transferred via the thrust bearing 5 into the valve spring cover and from there onto the valve spring.
- the valve spring performs a helical movement in its axial compression movement, which rotates with the cover 1 because of the large-area contact.
- the ratchet teeth arranged on the top of the cover slide relative to the ratchet ring 9, which is not rotated as it can perform an axially upward evasive movement through the toothed slopes.
- the valve itself does not turn either because the pressure finger on the rocker arm causes sufficient braking torque due to friction.
- valve spring When the valve closes, the valve spring is released. It can turn back to its starting position and, thanks to the non-positive connection with the valve cover, turn it back into its starting position.
- the rotation of the valve cover leads to the ratchet ring 9 being carried along, since the teeth which are in engagement with one another are directed on one side and have the effect of stops during the return movement.
- the rotary movement of the ratchet ring is transmitted to the base body via its feather keys and to the valve through the force-transmitting connection to the valve.
- the torque generated by the valve spring is significantly greater than the braking torque exerted by the rocker arm finger on the end face of the valve stem.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
Description
Der Grundkörper kann dabei über ein Axiallager auf dem Deckel abgestützt sein.
Ferner ist es von Vorteil, zur Aufnahme von Seitenkräften ein Nadellager zwischen dem Deckel und dem Grundkörper anzuordnen.
Um die Verdrehung des Ratschenringes relativ zum Grundkörper zu verhindern, kann dieser mit auf seinem Umfang verteilt angeordneten Paßfedern in axial gerichtete Nuten des Grundkörpers greifen und somit axial bewegbar bleiben.
Um ein ungewolltes Abheben des Ratschenringes von der Sperrverzahnung des Deckels zu verhindern, können Druckfedern zwischen dem Grundkörper und dem Ratschenring eingesetzt werden, so daß ein ständiger Eingriff zwischen den Sperrverzahnungen erreicht wird.
- Figur 1
- den Axialschnitt durch den Grundkörper, den Ventilfederdeckel und den Ölschutzdeckel,
- Figur 2
- eine Einzelheit der Sperrverzahnung im Umfangsschnitt und
- Figur 3
- eine Einzelheit der axialen Abstützung des Ratschenringes.
Um zu verhindern, daß der Ratschenring seinen Kontakt mit der Sperrverzahnung 8 verliert, sind Druckfedern 12 auf der Stirnfläche verteilt angeordnet. Die Federn 12 haben ihre Widerlager in Bohrungen 13 des Ratschenringes und in Hülsen 14, die mit ihren äußeren geschlossenen Flächen an der Unterseite eines Flansches 15 des Grundkörpers anliegen. Die Druckfeder 12 sorgt ständig durch eine geringfügige Vorspannung für einen ausreichenden Eingriff der Zähne der Sperrverzahnungen von Ratschenring und Ventilfederdeckel.
Die gesamte Einrichtung ist von einem Ölschutzdeckel 16 umfaßt und durch einen üblichen Sprengring 17 gesichert. Ein Ring 18 an der Unterseite des Deckels 1 sorgt für eine unverlierbare Verbindung der vormontierten Einheit.
Beim Schließen des Ventils wird die Ventilfeder entspannt. Sie kann sich wieder in ihre Ausgangsposition zurückdrehen und durch die kraftschlüssige Verbindung mit dem Ventildeckel diesen in seine Ausgangslage zurückdrehen. Die Drehung des Ventildeckels führt zu einer Mitnahme des Ratschenringes 9, da die miteinander in Eingriff stehenden Zähne einseitig gerichtet sind und bei der Rückdrehbewegung die Wirkung von Anschläge haben. Die Drehbewegung des Ratschenringes wird über dessen Paßfedern auf den Grundkörper und durch die kraftübertragende Verbindung mit dem Ventil auf dieses übertragen. Das von der Ventilfeder erzeugte Drehmoment ist erheblich größer als das vom Kipphebelfinger auf die Endfläche des Ventilschaftes ausgeübte Bremsmoment.
Claims (6)
- Vorrichtung zum Drehen eines Ventils einer Brennkraftmaschine während der Schließbewegung des Ventils, unter Verwendung eines Grundkörpers mit zentraler, konischer Bohrung und darin angeordneten Ventilkegelstücken zur kraft- und formschlüssigen Verbindung mit dem Ventilschaft und unter Verwendung eines Ventilfederdeckels mit einer Anlagefläche für die Ventilfeder dadurch gekennzeichnet, daß zwischen dem Deckel (1) und dem Grundkörper (3) Elemente (7, 8, 9, 10, 11) zum Übertragen der bei der Entlastungsbewegung der Ventilfeder auftretenden Federdrehbewegung vom Deckel auf den Grundkörper angeordnet sind.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Deckel mit einem zur Ventilachse (19) konzentrischen Zahnkranz (8) mit einer einseitig gerichteten Sperrverzahnung versehen ist, in welche ein Ratschenring (9) greift, der formschlüssig, jedoch in Ventillängsrichtung bewegbar, mit dem Grundkörper verbunden ist.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Grundkörper über ein Axiallager (5) auf dem Deckel abgestützt ist.
- Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß zur Aufnahme von Seitenkräften ein Nadellager (6) zwischen dem Deckel und dem Grundkörper angeordnet ist.
- Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Ratschenring mit auf seinem Umfang verteilt angeordneten Paßfedern (10) in axial gerichtete Nuten (11) des Grundkörpers greifend gegen relative Verdrehung zum Grundkörper gesichert ist.
- Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Ratschenring (9) durch auf seiner dem Grundkörper zugewandten Stirnfläche verteilt angeordnete Druckfedern (12) gegen ein Abheben von der Sperrverzahnung des Deckels gesichert ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10020071 | 2000-04-22 | ||
| DE10020071A DE10020071A1 (de) | 2000-04-22 | 2000-04-22 | Ventildrehvorrichtung |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1148211A2 true EP1148211A2 (de) | 2001-10-24 |
| EP1148211A3 EP1148211A3 (de) | 2002-11-06 |
| EP1148211B1 EP1148211B1 (de) | 2004-08-04 |
Family
ID=7639771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01109652A Expired - Lifetime EP1148211B1 (de) | 2000-04-22 | 2001-04-19 | Ventildrehvorrichtung |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1148211B1 (de) |
| DE (2) | DE10020071A1 (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108442379A (zh) * | 2018-05-08 | 2018-08-24 | 中国水电基础局有限公司天津机械制造分公司 | 一种灌浆压力控制装置 |
| CN115030795A (zh) * | 2022-05-19 | 2022-09-09 | 潍柴动力股份有限公司 | 气门旋转机构、发动机及设备 |
| CN117248980A (zh) * | 2023-11-15 | 2023-12-19 | 安徽中威机械工业有限公司 | 一种滚轮式摇臂机构及其使用方法 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7100716A (de) * | 1970-01-27 | 1971-07-29 | ||
| DE2155363A1 (de) * | 1971-11-08 | 1973-05-17 | Motor Components Birmingham Lt | Einrichtung zum drehen eines tellerventiles |
| DE3040519A1 (de) * | 1980-10-28 | 1982-05-27 | Industriewerk Schaeffler Ohg, 8522 Herzogenaurach | Vorrichtung zum drehen der ventile in brennkraftmaschinen |
| DE19500321A1 (de) * | 1995-01-07 | 1995-06-01 | Klaus Dipl Ing Henze | Ventildrehvorrichtung für Gaswechselventile |
| DE59709505D1 (de) * | 1997-07-16 | 2003-04-17 | Waertsilae Schweiz Ag Winterth | Vorrichtung zum Drehen eines Ventils |
-
2000
- 2000-04-22 DE DE10020071A patent/DE10020071A1/de not_active Withdrawn
-
2001
- 2001-04-19 DE DE50103061T patent/DE50103061D1/de not_active Expired - Fee Related
- 2001-04-19 EP EP01109652A patent/EP1148211B1/de not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108442379A (zh) * | 2018-05-08 | 2018-08-24 | 中国水电基础局有限公司天津机械制造分公司 | 一种灌浆压力控制装置 |
| CN115030795A (zh) * | 2022-05-19 | 2022-09-09 | 潍柴动力股份有限公司 | 气门旋转机构、发动机及设备 |
| CN117248980A (zh) * | 2023-11-15 | 2023-12-19 | 安徽中威机械工业有限公司 | 一种滚轮式摇臂机构及其使用方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1148211A3 (de) | 2002-11-06 |
| DE10020071A1 (de) | 2001-10-25 |
| EP1148211B1 (de) | 2004-08-04 |
| DE50103061D1 (de) | 2004-09-09 |
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