WO1995027842A1 - Schlepphebel für einen ventiltrieb einer brennkraftmaschine - Google Patents
Schlepphebel für einen ventiltrieb einer brennkraftmaschine Download PDFInfo
- Publication number
- WO1995027842A1 WO1995027842A1 PCT/EP1995/000908 EP9500908W WO9527842A1 WO 1995027842 A1 WO1995027842 A1 WO 1995027842A1 EP 9500908 W EP9500908 W EP 9500908W WO 9527842 A1 WO9527842 A1 WO 9527842A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rocker arm
- bore
- shaft
- cam follower
- recess
- Prior art date
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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/185—Overhead end-pivot rocking arms
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/20—Control lever and linkage systems
- Y10T74/20576—Elements
- Y10T74/20882—Rocker arms
Definitions
- the invention relates to a rocker arm for a valve train of an internal combustion engine, which is acted upon in its central region by a control cam, one end of which communicates with a gas exchange valve in the opening direction and the other end is pivotably supported by means of a bore on a shaft relative to a cylinder head of the internal combustion engine.
- FIG. 1 A rocker arm drive is shown here in FIG. 1, which is acted upon indirectly at one end by a control cam via a push rod and is positioned centrally in relation to a cylinder head by means of a bearing block and a shaft.
- a disadvantage of the device considered to be generic is that an axial position fixation of the rocker arm on the shaft is generally produced via spacer sleeves or other stops between the respective lever and the bearing block adjacent to it. Solutions are also known to experts in which the rocker arm is supported on the respective bearing block by at least one pressure spring. On the one hand, these arrangements are relatively complex in terms of production technology and, on the other hand, generate additional friction losses.
- valve-side safety measures can be taken from the prior art for this.
- the rocker arm can have cheeks extending in the direction remote from the cam on its side assigned to the respective gas exchange valve. A lateral migration of the respective drag lever is thus prevented via these cheeks. It is disadvantageous with this arrangement. that by the necessary axial extension of the cheeks in the valve direction is minimized for at least one valve spring acting on the gas exchange valve in the closing direction. Solutions are also known in which adjusting plates with a guide profile for the rocker arm are provided on the side of the gas exchange valve, on its spring plate. These adjusting plates direct additional forces to the respective valve stem, which leads to increased friction in a guide for the valve stem and accelerates premature wear.
- the invention is therefore based on the object of providing a cam follower of the type mentioned at the outset, in which the disadvantages indicated have been eliminated, and which can be fixed precisely in relation to its pivot axis, in particular with simple means and low manufacturing outlay.
- this object is achieved according to the characterizing part of claim 1 in that an area of the shaft which is enclosed by the bore of the rocker arm and extends at least close to the longitudinal center plane thereof has an annular groove in which a circumferential surface of the shaft radially protrudes to axially secure the rocker arm, these means, on the other hand, engage in or emanate from a recess in the bore of the rocker arm which is complementary to the latter, an equivalent solution for a rocker arm resulting from the associated claim 2.
- This configuration creates a simple axial fixation of the respective rocker arm or rocker arm on its associated shaft.
- the area of the shaft which is enclosed by the bore of the drag or rocker arm can also be provided that the area of the shaft which is enclosed by the bore of the drag or rocker arm. to be provided with a radial bore in which at least one roller body biased radially outwards via the force of at least one compression spring for axially securing the rocker arm or rocker arm.
- This rolling element also engages in an annular groove in the bore of the rocker arm or rocker arm.
- stops (not described in more detail) can be provided for the rolling elements in their bore in the shaft.
- Simple lubrication for all of the variants described here is provided by at least one radial bore through the shaft for drilling the housing.
- the shaft is designed as a hollow shaft.
- claims 12 to 15 relate to further expedient designs for securing the position of the rocker arm or rocker arm on its associated shaft.
- the recess according to claim 12 is advantageously in alignment with one of the legs of the sector-shaped recess of the bore during assembly, so that the rolling element can be inserted through the radial bore of the lever.
- the lever performs such a pivoting movement that the rolling element is prevented from falling out of the bore.
- the sector-shaped recess guarantees that the respective lever on the shaft is limited in terms of rotation.
- Other means than the rolling elements described here for securing the shaft in position are also included in the scope of protection of this invention. A screw or pin or similar connection would also be conceivable.
- FIG. 1 shows a side view of a valve train according to the invention
- FIG. 2 shows a view according to FIG. 1 in an enlarged illustration with a snap ring preloaded inwards
- FIG. 3 shows a cross section according to FIG. 2:
- Figure 4 is a view similar to Figure 2, but with the circlip biased outward;
- Figure 5 is a view with respect to a fixation of the
- Figure 6 is a view of a fixation of the rocker arm or rocker arm relative to the shaft, with a rolling element mounted therein;
- Figure 7 shows an embodiment similar to Figure 6
- Figure 8 shows a further variant according to the aforementioned
- Figure 9 shows an embodiment with a sector-shaped recess in the bore of the lever
- FIG. 10 shows a variant of securing the lever in position by means of a pin which is positioned in a sector-shaped recess in the shaft
- 11 shows a similar embodiment according to FIG. 10, but with a sector-shaped recess in the lever.
- a valve drive 1 shown in simplified form, can be seen by a person skilled in the art.
- this consists of a drag lever 2, which is acted upon by a control cam 4 in its central region 3.
- the rocker arm 2 acts with its one end 5 remote from the cam on a gas exchange valve 6 (not shown in more detail) in the lifting direction.
- a bore 7 runs parallel to the camshaft direction in the rocker arm 2. With this bore 7, the rocker arm 2 is pivotally supported on a shaft 8 with respect to a cylinder head, not shown, of the internal combustion engine.
- FIG. 2 shows a measure according to the invention for fixing the rocker arm 2 in position, which can also be produced as a rocker arm 9.
- an annular groove 10 In this annular groove 10, an inwardly pretensioned snap ring 11 runs.
- the snap ring 11 With an outer ring section 12, the snap ring 11 also runs in a recess 14 in the form of an annular groove 13 in the bore 7 of the rocker arm or rocker arm 2, 9.
- this measure is a simple position fixation of the rocker arm or rocker arm 2, 9 on its associated shaft 8 (see also Figure 3).
- the shaft 8 is designed as a hollow shaft, so that on the one hand it is shown favorably with regard to its mass and on the other hand hydraulic fluid can be passed through its bore 15, which is used to lubricate a bearing on the bore 7 of the rocker arm or rocker arm 2. 9 serves.
- FIG. 4 shows a person skilled in the art a similar measure of fixing the rocker arm or rocker arm 2, 9 according to FIG. 2.
- a snap ring 16 preloaded radially outward is applied. This therefore runs in the recess 14 in the form of an annular groove 13 of the drag or rocker arm 2, 9 and with an internal ring section 17 in the annular groove 10 of the shaft 8.
- the shaft 8 can be in the area of the rocker arm or rocker arm 2, 9 surrounding it, a radial bore 18 for lubricating the rocker arm or rocker arm 2 in the area of the rocker arm or rocker arm 2.
- 9 have bearing point formed on the shaft 8. A lubricant overflow from the bore 15 of the shaft 8 is thus provided.
- FIG. 5 An alternative variant of fixing the position of the towing or tilting hoist 2. 9 with respect to the shaft 8 as a swivel center is shown in FIG. 5.
- the shaft 8 has a radial bore 19 penetrating it in the area of the rocker arm or rocker arm 2. 9 which surrounds it.
- a sleeve 20 is inserted in the length of the diameter of the shaft 8.
- a compression spring 21 runs inside the sleeve 20. This compression spring 21 acts on the end of a respective rolling element 22.
- the rolling elements 22 protrude from a lateral surface 23 of the shaft 8 in such a way that they start with a portion of theirrelyu catch in the annular groove 13 of the bore 7 of the rocker arm or rocker arm 2, 9.
- the sleeve 20 is present on the one hand as a guide for the compression spring 21 and on the other hand it prevents a lubricant transfer from the bore 15 via the radial bore 19 to the bore 7. This lubricant transfer can also be produced in a targeted manner at the point just described, then dispenses with the radial bore 18.
- FIGS. 6 and 8 describe alternative design options compared to the aforementioned variants of securing the position for a rocker arm or rocker arm 2.9.
- the recess 14 of the bore 7 of the rocker arm or rocker arm 2, 9 is made as a bore 24, which extends radially with respect to the axial line of the shaft 8.
- a rolling element 25 runs radially on the inside in the bore 24 to secure the position of the rocker arm or rocker arm 2.9.
- this rolling element 25 also engages in the annular groove 10 of the shaft 8.
- the rolling element 25 is secured radially outward via a stop 26.
- the stop 26 is produced in FIG. 6 as a screw 27, in FIG.
- FIG. 9 shows an alternative variant of securing the position of the lever 2. 9 on its shaft 8 compared to the aforementioned variants.
- the bore 7 of the lever 2, 9 has a sector-shaped recess 33. in which a rolling element 32 is partially arranged, which on the other hand is positioned in a notch-shaped recess 31 in the shaft 8.
- a radial bore 34 is brought into alignment with the recess 31 by the lever 2.9, so that the rolling element 32 can then be inserted into the recess 31. Then, when a camshaft with control cam 4 is subsequently mounted, the lever 2, 9 is rotated in the valve direction in such a way that the rolling element 32 is prevented from falling out of the radial bore 34 during operation of the internal combustion engine. It is also conceivable to apply the radial bore 34 to the further leg of the recess 33 which is present here in the counterclockwise direction.
- FIGS. 10 and 11 show further variants of securing the position of the lever 2, 9 with respect to the shaft 8.
- a pin 35 a or 38 is provided, which is either arranged in a sector-shaped recess 35 of the shaft 8 and with its ends 36 runs in a corresponding radial bore 37 of the lever 2.9 or is arranged in a radial bore 37a of the shaft 8 and runs at least with one end 39 in a sector-shaped recess 40 of the lever 2.9.
- Limbs for the pin 35a or 38 are thus created by legs of the respective recess 35 or 40, as a result of which the maximum angle of rotation of the lever 2, 9 with respect to the shaft 8 is limited.
- rocker arm or rocker arm 2 9 or its associated shaft 8 as a pivoting center from a lightweight material and / or polymer material. It is conceivable to manufacture the rocker arm or rocker arm 2, 9 from an aluminum material. However, sheet metal training is also considered.
- Reference numerals 9 or its associated shaft 8 as a pivoting center from a lightweight material and / or polymer material. It is conceivable to manufacture the rocker arm or rocker arm 2, 9 from an aluminum material. However, sheet metal training is also considered. Reference numerals
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/687,540 US5706770A (en) | 1994-04-06 | 1995-03-11 | Valve drive of an internal combustion engine |
DE19580316T DE19580316D2 (de) | 1994-04-06 | 1995-03-11 | Schlepphebel für einen Ventiltrieb einer Brennkraftmaschine |
JP7526034A JPH09511559A (ja) | 1994-04-06 | 1995-03-11 | 内燃機関の弁作動装置用のロッカーアーム |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG9405694.3U | 1994-04-06 | ||
DE9405694U DE9405694U1 (de) | 1994-04-06 | 1994-04-06 | Schlepphebel für einen Ventiltrieb einer Brennkraftmaschine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995027842A1 true WO1995027842A1 (de) | 1995-10-19 |
Family
ID=6906965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1995/000908 WO1995027842A1 (de) | 1994-04-06 | 1995-03-11 | Schlepphebel für einen ventiltrieb einer brennkraftmaschine |
Country Status (4)
Country | Link |
---|---|
US (1) | US5706770A (de) |
JP (1) | JPH09511559A (de) |
DE (2) | DE9405694U1 (de) |
WO (1) | WO1995027842A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2682570A1 (de) | 2012-07-04 | 2014-01-08 | MAN Truck & Bus AG | Lagerung eines Kipphebels für einen Ventiltrieb einer Brennkraftmaschine |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19529041B4 (de) * | 1995-08-08 | 2006-07-27 | Schaeffler Kg | Kipp- oder Schlepphebelanordnung |
DE69716774T2 (de) | 1997-05-23 | 2004-12-30 | Vmi-Epe-Holland B.V. | Reifenaufbautrommel mit einer wulstumschlagvorrichtung |
DE19829269A1 (de) * | 1998-07-01 | 2000-01-05 | Volkswagen Ag | Nockenfolger und Verfahren zur Montage eines Nockenfolgers |
DE10261862B4 (de) * | 2002-12-20 | 2007-10-31 | Volkswagen Ag | Antriebsanordnung für Kraftstoffeinspritzventile vom Typ Pumpe-Düse-Element |
US8087391B2 (en) * | 2003-06-26 | 2012-01-03 | Tores Lawrence S | Apparatus and methodology for rocker arm assembly |
DE102011002566A1 (de) * | 2011-01-12 | 2012-07-12 | Schaeffler Technologies Gmbh & Co. Kg | Schaltbarer Schlepphebel |
EP2798172B1 (de) * | 2011-12-27 | 2015-10-14 | Mitsubishi Heavy Industries, Ltd. | Bypassventil und abgasturbolader mit dem bypassventil |
DE102017218372A1 (de) * | 2017-10-13 | 2019-04-18 | Mahle International Gmbh | Nockenfolger eines Ventiltriebs |
DE102018207458A1 (de) * | 2018-05-15 | 2019-11-21 | Mahle International Gmbh | Lageranordnung einer Nockenrolle eines Ventiltriebs |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1469155A (en) * | 1922-01-31 | 1923-09-25 | Hedberg Roy Edgar | Valve rocker arm |
US1699657A (en) * | 1926-07-30 | 1929-01-22 | John T Fagan | Rocker arm and rocker-arm assembly |
US1984198A (en) * | 1930-12-05 | 1934-12-11 | Harry L Notter | Valve operating device |
US2433138A (en) * | 1945-03-21 | 1947-12-23 | Napier & Son Ltd | Fastening device for connecting two separable members |
FR966826A (fr) * | 1948-05-25 | 1950-10-19 | Nat Ets | Mandrin de blocage en hauteur de colonne verticale coulissante |
US2769434A (en) * | 1953-11-04 | 1956-11-06 | Studebaker Packard Corp | Overhead valve arrangement for engines |
FR2216860A5 (de) * | 1973-02-06 | 1974-08-30 | Chrysler France | |
DE2620142A1 (de) * | 1976-05-07 | 1977-11-10 | Ford Werke Ag | Runddrahtsprengring |
US5101777A (en) * | 1990-02-20 | 1992-04-07 | Yamaha Hatsudoki Kabushiki Kaisha | Automobile engine structure |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1911299B1 (de) * | 1969-03-06 | 1971-01-14 | Rheinstahl Hanomag Ag | Lagerung fuer Kipphebel von Brennkraftmaschinen |
JPS54140015A (en) * | 1978-04-21 | 1979-10-30 | Toyota Motor Corp | Variable valve engine |
JPS5786512A (en) * | 1980-11-17 | 1982-05-29 | Mitsubishi Motors Corp | Stopping mechanism of valve rocking action |
JPS58211515A (ja) * | 1982-06-04 | 1983-12-09 | Nissan Motor Co Ltd | 弁「隙」間自動調整装置 |
US4630576A (en) * | 1985-05-15 | 1986-12-23 | Raymond Kenneth W | Intake valve rocker arms of certain six cylinder internal combustion engines |
KR940001318B1 (ko) * | 1990-01-18 | 1994-02-19 | 미쯔비시 지도샤 고교 가부시끼가이샤 | 밸브 이동장치 |
DE4302781A1 (en) * | 1992-02-12 | 1993-08-19 | Neumayer Erich Gmbh Co Kg | Lever to actuate valves in IC engines - has central round passage in pivot direction, and H- shaped sections on either side |
JP3473065B2 (ja) * | 1993-10-30 | 2003-12-02 | スズキ株式会社 | ロッカアーム |
-
1994
- 1994-04-06 DE DE9405694U patent/DE9405694U1/de not_active Expired - Lifetime
-
1995
- 1995-03-11 JP JP7526034A patent/JPH09511559A/ja active Pending
- 1995-03-11 WO PCT/EP1995/000908 patent/WO1995027842A1/de active Application Filing
- 1995-03-11 US US08/687,540 patent/US5706770A/en not_active Expired - Fee Related
- 1995-03-11 DE DE19580316T patent/DE19580316D2/de not_active Ceased
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1469155A (en) * | 1922-01-31 | 1923-09-25 | Hedberg Roy Edgar | Valve rocker arm |
US1699657A (en) * | 1926-07-30 | 1929-01-22 | John T Fagan | Rocker arm and rocker-arm assembly |
US1984198A (en) * | 1930-12-05 | 1934-12-11 | Harry L Notter | Valve operating device |
US2433138A (en) * | 1945-03-21 | 1947-12-23 | Napier & Son Ltd | Fastening device for connecting two separable members |
FR966826A (fr) * | 1948-05-25 | 1950-10-19 | Nat Ets | Mandrin de blocage en hauteur de colonne verticale coulissante |
US2769434A (en) * | 1953-11-04 | 1956-11-06 | Studebaker Packard Corp | Overhead valve arrangement for engines |
FR2216860A5 (de) * | 1973-02-06 | 1974-08-30 | Chrysler France | |
DE2620142A1 (de) * | 1976-05-07 | 1977-11-10 | Ford Werke Ag | Runddrahtsprengring |
US5101777A (en) * | 1990-02-20 | 1992-04-07 | Yamaha Hatsudoki Kabushiki Kaisha | Automobile engine structure |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2682570A1 (de) | 2012-07-04 | 2014-01-08 | MAN Truck & Bus AG | Lagerung eines Kipphebels für einen Ventiltrieb einer Brennkraftmaschine |
DE102012013220A1 (de) | 2012-07-04 | 2014-01-09 | Man Truck & Bus Ag | Lagerung eines Kipphebels für einen Ventiltrieb einer Brennkraftmaschine |
Also Published As
Publication number | Publication date |
---|---|
DE19580316D2 (de) | 1996-08-22 |
DE9405694U1 (de) | 1994-05-26 |
US5706770A (en) | 1998-01-13 |
JPH09511559A (ja) | 1997-11-18 |
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