EP1723317A1 - Lever for a valve control of a piston machine - Google Patents
Lever for a valve control of a piston machineInfo
- Publication number
- EP1723317A1 EP1723317A1 EP05745191A EP05745191A EP1723317A1 EP 1723317 A1 EP1723317 A1 EP 1723317A1 EP 05745191 A EP05745191 A EP 05745191A EP 05745191 A EP05745191 A EP 05745191A EP 1723317 A1 EP1723317 A1 EP 1723317A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lever
- side part
- bearing pin
- taper
- width
- 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
- 239000000463 material Substances 0.000 claims description 8
- 238000004080 punching Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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
- F01L2303/00—Manufacturing of components used in valve arrangements
-
- 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
- F01L2305/00—Valve arrangements comprising rollers
- F01L2305/02—Mounting of rollers
-
- 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 lever for the valve control of a piston engine, preferably for the lift valve control of an internal combustion piston engine, such as a rocker arm, rocker arm or rocker arm, with a roller which is arranged in an intermediate space between two side parts of the lever and on an inside Lever attached bearing pin is mounted.
- Levers of the type mentioned above are preferably used in stroke valve controls of internal combustion piston engines.
- a hole for the installation of the bearing pin must be made in each of the side parts such that they lie coaxially with one another. This is usually done in a non-cutting (sheet metal) lever by punching the two lever side parts in opposite directions, the pieces of material released during the punching first being pressed into the roller pocket lying between the two side parts and then being removed from there. This method cannot be used if the sum of the thicknesses of the material pieces removed is greater than the width of the roller pocket in the lever.
- the invention has for its object to ensure opposing punching for the production of the holes in both side parts of the lever even with such levers that have a width of the roller pocket for constructional reasons, which is smaller than the sum of the thicknesses of both side parts.
- the invention is based on the finding that the method of opposing punching can be used with such levers on the condition that the sum of the thicknesses of the pieces of material released during punching is smaller than the width of the roller pocket.
- the invention is therefore based on a lever for the valve control of a piston machine, such as a rocker arm, rocker arm or rocker arm, with a roller provided for support on a rotatable cam, which lies in a roller pocket enclosed by a left and a right side part and is rotatably mounted on a bearing pin mounted in the lever.
- the wall thickness of the side parts in the area surrounding the later bore for receiving the bearing pin.
- the wall thicknesses should be reduced so that the width of the roller pocket is equal to or greater than the sum of the locally reduced lever wall thicknesses of the left and right side parts.
- Such tapering also reduce the width of the side parts compared to the bearing pin.
- the tapering of the side parts can be carried out using primary, forming or material-removing processes. At the same time, it can advantageously replace the depressions frequently introduced subsequently in known levers for caulking the bearing bolts.
- the shape of the taper is optional, provided that the maximum permissible thickness of the lever wall thickness in the area of these tapering is not exceeded.
- provision can be made to incorporate the mentioned tapering of the lever side walls during the manufacture of the raw shape of the lever and to produce it by forming processes.
- An additional advantage can result from the fact that subsequent hardening of the material causes the base material to solidify.
- a taper on the outside of the left side part can be paired with a taper on the inside of the right side part.
- a taper on the inside of the left side part can be combined with a taper on the inside in the right side part.
- Another possibility is to combine the four possible positions of the tapering with one another. The selection of the combinations can result from design requirements, operating conditions resulting from the application, or production-related constraints.
- a preferred embodiment of the invention is to provide the taper in the two side parts on the outside. This gives the possibility of caulking the bearing pin in the area of the taper, the connection techniques between side parts and the bearing pin being retained.
- Figure 1 is a perspective view of the lever according to the invention.
- Fig. 2 is a sectional view of the lever in the plane of the storage (section A-A).
- Fig. 1 shows a roller rocker arm, as it can be used in the lift valve control of internal combustion piston engines.
- the same essentially consists of a left side part 1, a right side part 2, a connecting web 3 (bearing pan) and a connecting web 4 (bracket).
- a roller 6 which is rotatably mounted on a bearing pin 7.
- a taper 8 of the same is formed at least on the outside of the left side part 1.
- the tapering 8, 9, 10 and 16 are so deep that the sum of the load-bearing width 12 of the left side part 1 and the load-bearing width 13 of the right side part 2 for the bearing bolt 7 is smaller or at most the same size as the total width 11 of the roller pocket 5. It follows that the sum of the thicknesses of the pieces of material released during counter-perforation is also smaller or at most equal to the total width 11 of the roller pocket 5.
- the preferred method for producing the bores 14 for the bearing pin 7 in the side parts 1, 2 can be maintained by punching in opposite directions despite the reduction in the size of the roller pocket 5.
- the structure described above makes it possible to reduce the total width of the roller pocket 5 as much as the structural, technological and operational requirements permit.
- the material egg use for the lever and for the roller 6 can be reduced as well as its size. This also means that the mass to be moved can be reduced, which opens up possibilities for optimizing the operating behavior of the piston machines in question. This minimization is only limited by strength requirements.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004012142A DE102004012142A1 (en) | 2004-03-12 | 2004-03-12 | Lever for the valve control of a piston engine |
PCT/EP2005/001273 WO2005088083A1 (en) | 2004-03-12 | 2005-02-09 | Lever for a valve control of a piston machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1723317A1 true EP1723317A1 (en) | 2006-11-22 |
EP1723317B1 EP1723317B1 (en) | 2007-06-20 |
Family
ID=34895287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05745191A Active EP1723317B1 (en) | 2004-03-12 | 2005-02-09 | Lever for a valve control of a piston machine |
Country Status (5)
Country | Link |
---|---|
US (1) | US7444972B2 (en) |
EP (1) | EP1723317B1 (en) |
CN (1) | CN100410499C (en) |
DE (2) | DE102004012142A1 (en) |
WO (1) | WO2005088083A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011007450A1 (en) | 2011-04-15 | 2012-10-18 | Schaeffler Technologies AG & Co. KG | Cam follower of a valve train and method for its production |
JP6721374B2 (en) | 2016-03-29 | 2020-07-15 | 株式会社オティックス | Rocker arm and method of manufacturing rocker arm |
USD818017S1 (en) * | 2017-04-25 | 2018-05-15 | Stolle Machinery Company, Llc | Multi-stroke swing lever |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3194200A (en) * | 1962-10-19 | 1965-07-13 | Parsons Corp | Process of manufacturing rocker arm |
DE19742778A1 (en) * | 1997-09-27 | 1999-04-01 | Schaeffler Waelzlager Ohg | Rocker arm for valve gear of internal combustion engine |
JP3497368B2 (en) * | 1998-01-21 | 2004-02-16 | 中西金属工業株式会社 | Rocker arm manufacturing method and manufacturing apparatus |
JP3582977B2 (en) * | 1998-01-21 | 2004-10-27 | 中西金属工業株式会社 | Rocker arm manufacturing method |
US6199527B1 (en) * | 1998-03-12 | 2001-03-13 | Nsk Ltd. | Sheet metal rocker arm, manufacturing method thereof, cam follower with said rocker arm, and assembling method thereof |
JP3526757B2 (en) * | 1998-08-04 | 2004-05-17 | 本田技研工業株式会社 | Valve train for internal combustion engine |
DE10030341C2 (en) * | 2000-06-20 | 2003-04-10 | Ina Schaeffler Kg | Process for producing a lever-like cam follower |
EP1447526A4 (en) * | 2001-11-21 | 2004-12-29 | Nsk Ltd | Cam follower with sheet metal rocker arm |
JPWO2003064821A1 (en) * | 2002-02-01 | 2005-05-26 | 日本精工株式会社 | Cam follower with sheet metal rocker arm |
JP4059727B2 (en) * | 2002-08-01 | 2008-03-12 | 株式会社オティックス | Rocker arm shaft hole punching device |
-
2004
- 2004-03-12 DE DE102004012142A patent/DE102004012142A1/en not_active Withdrawn
-
2005
- 2005-02-09 WO PCT/EP2005/001273 patent/WO2005088083A1/en active IP Right Grant
- 2005-02-09 CN CNB2005800071650A patent/CN100410499C/en active Active
- 2005-02-09 US US10/598,793 patent/US7444972B2/en active Active
- 2005-02-09 EP EP05745191A patent/EP1723317B1/en active Active
- 2005-02-09 DE DE502005000903T patent/DE502005000903D1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2005088083A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE502005000903D1 (en) | 2007-08-02 |
CN1930376A (en) | 2007-03-14 |
US7444972B2 (en) | 2008-11-04 |
WO2005088083A1 (en) | 2005-09-22 |
DE102004012142A1 (en) | 2005-09-29 |
CN100410499C (en) | 2008-08-13 |
EP1723317B1 (en) | 2007-06-20 |
US20070151533A1 (en) | 2007-07-05 |
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