EP2870326A1 - Nockenfolger für den ventiltrieb einer brennkraftmaschine - Google Patents
Nockenfolger für den ventiltrieb einer brennkraftmaschineInfo
- Publication number
- EP2870326A1 EP2870326A1 EP13724279.8A EP13724279A EP2870326A1 EP 2870326 A1 EP2870326 A1 EP 2870326A1 EP 13724279 A EP13724279 A EP 13724279A EP 2870326 A1 EP2870326 A1 EP 2870326A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cam follower
- inner ring
- outer ring
- lever
- 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.)
- Withdrawn
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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H53/00—Cams or cam-followers, e.g. rollers for gearing mechanisms
- F16H53/06—Cam-followers
-
- 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
- Y10T74/20582—Levers
Definitions
- the invention relates to a cam follower for the valve train of an internal combustion engine, comprising a housing in the form of a lever body and arranged between two parallel lever cheeks of the housing cam roller comprising an outer ring and an inner ring located therein, wherein on one of the lever cheeks held bolt is rotatably mounted.
- Such a cam follower is known from the document DE 10 2008 036 056 A1.
- This is designed as a drag lever, which is mounted with an end portion on a stationary arranged in the internal combustion engine supporting element ball and actuates a gas exchange valve with its other end portion.
- the cam roller is arranged in the central portion of the finger lever between the side walls forming levers and requires for the storage of its outer ring and its inner ring relative to the bolt a rolling body with trained as needles rolling elements. These are arranged in the inner ring, which is surrounded by the outer ring. Therefore, for the needles, the outer race in the inner ring and the inner Runway on the bolt.
- the needles have a slightly smaller axial length than the outer ring and the inner ring, so they are almost as wide as this.
- cam follower is to be used for a sliding cam design, that is to say an embodiment of the valve drive with a cam piece arranged axially displaceably on the camshaft, as described, for example, in US Pat. B. from the document DE 10 2004 002 290 A1, an axially narrow, on the lever housing clearly protruding outer ring of the cam follower is required. In the case of a very narrow design of the outer ring, however, the pres- sure occurring during operation on this component is increased, which can lead to a shortfall in the required fatigue strength.
- cam followers there are also embodiments of cam followers are known, the inner ring is slidably mounted in each case sliding, ie without WälzSystemsatz on the bolt. Such a sliding inner ring without bearings but leads disadvantageously in operation to increased friction.
- the invention has for its object to achieve a solid design of the valve train with cam followers, which is suitable for the sliding cam system.
- the respective cam follower with a narrow outer ring, so with an outer ring of small axial length to be designed so that during operation in the lever area significantly lower justifypressun gene occur, as in prior art cam followers.
- the solution according to the invention thus consists of a lever body, which allows a stepped guide of two rings of different width or axial length.
- the outer ring is positioned by the inner sides of the inwardly extending guide portions, while the inner ring is positioned by the inner sides of the lever cheeks.
- the outer ring and the inner ring may be formed in the cam follower as a one-piece component. But it is also possible that the outer ring and the inner ring are two individual components, wherein the outer ring is mounted on the inner ring.
- the inner ring may be rotatably supported by a rolling element set on the bolt and the rolling element set may be designed with trained as needles rolling elements, which have the same axial length as the inner ring.
- the contact of the inner ring with the equally wide needles results in a larger contact zone and thus lower pressure values can be achieved there.
- Figure 1 shows a cam follower according to the invention in a perspective view
- FIG. 2 shows the cam follower according to the invention in a side view in FIG.
- Figure 3 shows the cam follower according to the invention in a section according to
- a cam follower 1 for a valve train of an internal combustion engine consists of a housing in the form of a lever body 2 with two parallel, spaced apart lever cheeks 3 and 4.
- the cam follower is designed as a cam follower, in its central region in aligned holes of the two lever cheeks. 3 and 4 a bolt 5 is arranged and held.
- a cam roller 6 is arranged in the lever body 2, which is rotatably mounted on the pin 5. This consists of an outer ring 7 and an inner ring 8 rotatably mounted on the pin 5.
- two guide regions 9 and 10 are formed on the lever body 2, which extend inwards. They are located in Figure 3 at the lower ends of the lever cheeks 3 and 4. With their inner surfaces they position the outer ring 7 and form during its rotation in the circumferential direction for him guide surfaces. Compared to the inner distance dimension of the lever cheeks 3 and 4 of the lever body 2, the width of the outer ring 7, so its axial length, lower.
- the inner ring 8 is rotatably mounted in the lever body 2 with a rolling element on the bolt 5, the rolling elements are needles 1 1.
- the axial lengths of the inner ring 8 and the needles 1 1 are the same size and correspond to the inner spacing of the lever cheeks 3 and 4. Therefore, the opposite of the outer ring 7 wider inner ring 8 is positioned by the inner surfaces of the lever cheeks 3 and 4 and guided in the circumferential direction.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Gears, Cams (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012211525.0A DE102012211525A1 (de) | 2012-07-03 | 2012-07-03 | Nockenfolger für den Ventiltrieb einer Brennkraftmaschine |
| PCT/EP2013/060604 WO2014005760A1 (de) | 2012-07-03 | 2013-05-23 | Nockenfolger für den ventiltrieb einer brennkraftmaschine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2870326A1 true EP2870326A1 (de) | 2015-05-13 |
Family
ID=48470996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13724279.8A Withdrawn EP2870326A1 (de) | 2012-07-03 | 2013-05-23 | Nockenfolger für den ventiltrieb einer brennkraftmaschine |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20150176438A1 (de) |
| EP (1) | EP2870326A1 (de) |
| DE (1) | DE102012211525A1 (de) |
| WO (1) | WO2014005760A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004002290B4 (de) | 2004-01-16 | 2015-05-21 | Audi Ag | Ventiltrieb einer Brennkraftmaschine |
| DE102008034648A1 (de) * | 2008-07-25 | 2010-01-28 | Schaeffler Kg | Nockenfolger für einen Ventiltrieb einer Brennkraftmaschine |
| DE102008036056A1 (de) | 2008-08-01 | 2010-02-04 | Schaeffler Kg | Nockenfolger für einen Ventiltrieb einer Brennkraftmaschine |
| DE102010005606A1 (de) * | 2010-01-25 | 2011-07-28 | Schaeffler Technologies GmbH & Co. KG, 91074 | Nockenfolger zur Betätigung eines Gaswechselventils |
| DE102010024196A1 (de) * | 2010-06-17 | 2011-12-22 | Schaeffler Technologies Gmbh & Co. Kg | Schlepphebel für einen Ventiltrieb einer Brennkraftmaschine |
| DE102011087557A1 (de) * | 2011-12-01 | 2013-06-06 | Schaeffler Technologies AG & Co. KG | Folgeglied |
-
2012
- 2012-07-03 DE DE102012211525.0A patent/DE102012211525A1/de not_active Withdrawn
-
2013
- 2013-05-23 US US14/412,264 patent/US20150176438A1/en not_active Abandoned
- 2013-05-23 WO PCT/EP2013/060604 patent/WO2014005760A1/de not_active Ceased
- 2013-05-23 EP EP13724279.8A patent/EP2870326A1/de not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2014005760A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014005760A1 (de) | 2014-01-09 |
| DE102012211525A1 (de) | 2014-01-09 |
| US20150176438A1 (en) | 2015-06-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20150203 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| AX | Request for extension of the european patent |
Extension state: BA ME |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: STARK, MELANIE Inventor name: KRETSCHMER, JUERGEN Inventor name: SCHOBER, MICHAEL |
|
| DAX | Request for extension of the european patent (deleted) | ||
| RIC1 | Information provided on ipc code assigned before grant |
Ipc: F01L 1/18 20060101ALI20151120BHEP Ipc: F16H 53/06 20060101AFI20151120BHEP |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| INTG | Intention to grant announced |
Effective date: 20160126 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20160607 |
|
| P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230522 |