WO2002031321A1 - Lever-type cam follower - Google Patents
Lever-type cam follower Download PDFInfo
- Publication number
- WO2002031321A1 WO2002031321A1 PCT/EP2001/011388 EP0111388W WO0231321A1 WO 2002031321 A1 WO2002031321 A1 WO 2002031321A1 EP 0111388 W EP0111388 W EP 0111388W WO 0231321 A1 WO0231321 A1 WO 0231321A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- securing part
- nockenfoiger
- crossbar
- cam follower
- side walls
- 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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
-
- 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
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/24—Safety means or accessories, not provided for in preceding sub- groups of this group
Definitions
- the invention relates to a lever-like Nockenfoiger made of thin-walled material such as sheet metal, in particular for a valve train of an internal combustion engine, with two parallel side walls connected by a crossbar, an underside of the crossbar at one end having a separate securing part with two cheeks aligned parallel to the side walls Guidance of a gas exchange valve and wherein the crossbar has an opening with a crossbar facing the securing part.
- Nockenfoiger emerges from DE-OS 197 30 201 considered to be generic.
- This is also made of a sheet metal material, and has at one end a separate securing part for lateral guidance of a gas exchange valve.
- This securing part is designed as a U-like clip, which is placed with its crosspiece over the side walls of the cam follower. It is disadvantageous in the aforementioned prior art that the side walls of the cam follower are left out for guiding the securing part. On the one hand, this weakens the cam foiger in this area and, on the other hand, the manufacturing effort is unnecessarily increased.
- the object of the invention is therefore to provide a Nockenfoiger of the type mentioned, in which the disadvantages cited are eliminated with simple means.
- the securing part has a U-like geometry, a web, which connects opposite legs of the securing part, rests on the underside of the crossbeam and has a recess in which the gas exchange valve can be guided, on which recess the cheeks are formed, the legs in Seen in the longitudinal direction of the cam follower, they lie one behind the other and one leg is engaged in the opening on the transverse web and the other leg is held at one end in the region of an end face of the cam follower.
- cam pointers can be used as previously described. It should be noted that there is no weakening of the cross section of the cam follower in the area of the securing part.
- the securing part is simple and inexpensive to manufacture and can be attached via its legs, for example by clipping, bending, snapping or flanging, on an upper side of the crossbeam.
- the lateral guidance on the gas exchange Selventil is only realized by edges of a recess punched out of the crossbar of the securing part.
- the area of the side cheeks of the recess can be increased compared to the height of the recess itself.
- the cheeks can then consist of the material that was originally part of the recess.
- a particularly rigid securing part in the guide area is present when the entire recess is formed by an extension which points away from the web and which then also has the cheeks. This approach advantageously has the same height all around.
- a further preferred embodiment of the invention relates to the fact that a window is arranged in at least one of the legs of the securing part, into which the crossbar projects.
- the securing part is again very simply fixed in position on the crossbar.
- the securing part is connected to the crossbar via the legs by flanging, this can be made soft, at least in its leg region, so that the flanging can be implemented easily.
- the securing part can be designed to be spring-hard, so that it can be easily connected to the crossbar by clipping.
- the U-profile proposed for the cam follower according to a further subclaim represents a particularly rigid configuration of the cam follower.
- an inverted U-profile or an H-profile is also conceivable or similar.
- the scope of the invention includes a cam follower, which is not made from sheet steel, but instead consists of another lightweight material or a composite material or of cast iron and the like.
- the gap should be chosen so small that the leg is held on the roller by positive locking in the event of undesired jumping off (caused by an acceleration shock, etc.).
- the Nockenfoiger is advantageously designed as a rocker arm, which is mounted on a support element at its further end.
- lever-like cam followers with a securing part are conceivable, which can be used in a valve train of an internal combustion engine and in which it is expedient to implement an extremely simple guide with respect to at least one gas exchange valve.
- Figure 1 shows a partial longitudinal section through an inventive
- FIG. 2, 3 appropriate forms of attachment of the securing part on the crossbar and Figure 4 shows an alternative embodiment of the securing part.
- FIG. 1 discloses a partial longitudinal section through a cam follower 1 according to the invention. This consists of two parallel side walls 2 which are connected to one another by a crossbar 3. The side walls 2 and the crossbar 3 form a U-shaped profile when viewed in cross section.
- the cam follower 1 is designed as a rocker arm, which has a roller 4 mounted in the side walls 2 in the area of its center for a low-friction cam tap. In the area of its one end 5, the cam follower 1 has a separate and thin-walled securing part 6. Via this securing part 6, which will be explained in more detail below, the cam follower 1 is guided laterally on a gas exchange valve which is not shown in the drawing.
- the securing part 6 is made approximately U-shaped and consists of two opposing legs 7, 8. Both legs 7, 8 are connected to each other by a web 9.
- the web 9 rests on an underside 10 of the crossbar 3. It has a recess 11 according to the invention, via which the guidance on the gas exchange valve is implemented in an expedient manner.
- the leg 7 is also connected to the crossbar 3, for example, also via the aforementioned fastening measure.
- clips and similar connections are also conceivable (see also claims and information on the advantages of the claims).
- the cam follower 1 is guided over the edges of the recess 11 on one end of a valve shaft of the gas exchange valve.
- lateral guidance is important here, so that it is proposed to increase the guide height by forming cheeks 16 on the side of the gas exchange valve, that is to say parallel to the longitudinal extent of the cam follower 1.
- These cheeks 16 can, for example, be formed from the material of the recess 11.
- the gap (a) shown in the drawing between the roller (4) and the leg (7) is preferably chosen to be smaller than a thickness of the leg (7). This prevents the securing part (6) from jumping off during operation (see also information on the advantages of the claims).
- FIG. 2 reveals that the leg 8 can also have a window 17 in the region of one end 5, in which the crossbeam 3 extends at the end. This represents an alternative form of fastening the securing part 6 to the crossbeam 3.
- FIG. 3 shows that the leg 8 can be bent, for example, in a hinge-like manner on the upper side 15 of the crossbar 3 in order to fix the position.
- FIG. 4 discloses that the entire recess 11 of the web 9 can be produced by an extension 18 pointing away from it. This approach 18 thus also has the cheeks 16. It is advantageous with this design that the securing part 6 has a particularly rigid design in its guide area.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01986737A EP1325213A1 (en) | 2000-10-12 | 2001-09-29 | Lever-type cam follower |
JP2002534671A JP2004528502A (en) | 2000-10-12 | 2001-09-29 | Lever cam follower |
AU2002215916A AU2002215916A1 (en) | 2000-10-12 | 2001-09-29 | Lever-type cam follower |
DE10194325T DE10194325D2 (en) | 2000-10-12 | 2001-09-29 | Lever-like cam follower |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US23974100P | 2000-10-12 | 2000-10-12 | |
US60/239,741 | 2000-10-12 | ||
DE10050820.0 | 2000-10-13 | ||
DE2000150820 DE10050820A1 (en) | 2000-10-13 | 2000-10-13 | Lever-like cam follower esp. for valve drive of IC engines has separate U-shaped securing part with central web engaging on cam follower cross bar |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002031321A1 true WO2002031321A1 (en) | 2002-04-18 |
Family
ID=26007351
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2001/011388 WO2002031321A1 (en) | 2000-10-12 | 2001-09-29 | Lever-type cam follower |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1325213A1 (en) |
JP (1) | JP2004528502A (en) |
AU (1) | AU2002215916A1 (en) |
DE (1) | DE10194325D2 (en) |
WO (1) | WO2002031321A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2926645A (en) * | 1959-06-15 | 1960-03-01 | Guarraia Joseph | Rocker arm assembly for internal combustion engines |
DE1925772A1 (en) * | 1969-05-21 | 1970-11-26 | Ford Werke Ag | Rocker and rocker arm guide for combustion engines |
US5016582A (en) | 1990-10-12 | 1991-05-21 | Henley Manufacturing Holding Company, Inc. | Rocker arm |
WO1998020235A1 (en) * | 1996-11-07 | 1998-05-14 | INA Wälzlager Schaeffler oHG | Finger lever shaped without cutting |
DE19730201A1 (en) | 1997-07-15 | 1999-01-21 | Schaeffler Waelzlager Ohg | Operating lever for valve gear of internal combustion engine |
-
2001
- 2001-09-29 WO PCT/EP2001/011388 patent/WO2002031321A1/en not_active Application Discontinuation
- 2001-09-29 DE DE10194325T patent/DE10194325D2/en not_active Expired - Fee Related
- 2001-09-29 AU AU2002215916A patent/AU2002215916A1/en not_active Abandoned
- 2001-09-29 JP JP2002534671A patent/JP2004528502A/en active Pending
- 2001-09-29 EP EP01986737A patent/EP1325213A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2926645A (en) * | 1959-06-15 | 1960-03-01 | Guarraia Joseph | Rocker arm assembly for internal combustion engines |
DE1925772A1 (en) * | 1969-05-21 | 1970-11-26 | Ford Werke Ag | Rocker and rocker arm guide for combustion engines |
US5016582A (en) | 1990-10-12 | 1991-05-21 | Henley Manufacturing Holding Company, Inc. | Rocker arm |
WO1998020235A1 (en) * | 1996-11-07 | 1998-05-14 | INA Wälzlager Schaeffler oHG | Finger lever shaped without cutting |
DE19730201A1 (en) | 1997-07-15 | 1999-01-21 | Schaeffler Waelzlager Ohg | Operating lever for valve gear of internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
AU2002215916A1 (en) | 2002-04-22 |
JP2004528502A (en) | 2004-09-16 |
DE10194325D2 (en) | 2003-11-20 |
EP1325213A1 (en) | 2003-07-09 |
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