EP0853716A1 - Culbuteur pour moteur a combustion interne - Google Patents

Culbuteur pour moteur a combustion interne

Info

Publication number
EP0853716A1
EP0853716A1 EP97918952A EP97918952A EP0853716A1 EP 0853716 A1 EP0853716 A1 EP 0853716A1 EP 97918952 A EP97918952 A EP 97918952A EP 97918952 A EP97918952 A EP 97918952A EP 0853716 A1 EP0853716 A1 EP 0853716A1
Authority
EP
European Patent Office
Prior art keywords
rocker arm
roller body
valve
guide
parts
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
Application number
EP97918952A
Other languages
German (de)
English (en)
Other versions
EP0853716B1 (fr
Inventor
Günter Kampichler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorenfabrik Hatz GmbH and Co KG
Original Assignee
Motorenfabrik Hatz GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Motorenfabrik Hatz GmbH and Co KG filed Critical Motorenfabrik Hatz GmbH and Co KG
Publication of EP0853716A1 publication Critical patent/EP0853716A1/fr
Application granted granted Critical
Publication of EP0853716B1 publication Critical patent/EP0853716B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F01L1/181—Centre pivot rocking arms
    • F01L1/182—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
    • F01L1/183—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft of the boat type
    • 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

Definitions

  • the invention relates to a rocker arm for the valve control of an internal combustion engine, the rocker arm being made from a stamped, deep-drawn and then heat-treated deep-drawn sheet.
  • rocker arms are known from the prior art, they are common as a transmission element in three types of engine control, in bumper engines with a camshaft at the bottom, with a camshaft at the top with a rocker arm as a direct transmission element between the camshaft and valve and tappet control, the rocker arm and tappet forming the transmission mechanism .
  • the mechanical valve setting for sheet metal rocker arms is carried out on the ball socket bearing or on the rocker arm end by means of adjusting screws or eccentrics.
  • the change in the lever ratio has an adverse effect on an adjustment on the ball socket bearing.
  • the present invention is therefore based on the problem (object) of improving the deep-drawn rocker arm known from the prior art and substantially reducing valve guide wear and tear at the same time to simplify the manufacture and make it more cost-effective.
  • the rocker arm is designed such that it has opposite side parts, between which a roller body is rotatably arranged.
  • the rocker arm according to the invention is very inexpensive to manufacture, since only deep-drawing and punching processes, but no machining is required.
  • the deep-drawn part is then heat-treated by nitriding, carburizing or case hardening.
  • the valve setting is carried out on the ball socket bearing by means of a ball nut and lock bolt or lock screw.
  • a semi-cylindrical or cylindrical guide block with lock nut can also be used if the rocker arm is shaped accordingly.
  • the invention provides that the roller body is mounted in slots in the side parts which are open in the direction of the valve stem.
  • a highly advantageous embodiment of the invention provides that side guide parts are provided in the two end regions of the roller body, which laterally overlap the valve stem. This surprisingly prevents the rocker arm from rotating on the valve stem, i.e. the valve lever stabilizes around its longitudinal axis.
  • the side guide parts can be integrally connected to the roller body, i.e. protrude beyond its diameter, or be separate components. It is important that the tilting movement of the rocker arm and the rolling of the roller body are not hindered.
  • an advantageous embodiment of the present invention provides that the side guide parts are arranged between the side parts and the roller body. As a result, the rocker arm and the valve stem are fixed relative to one another via the side guide parts.
  • a further advantageous embodiment provides that the side parts are guide disks. This allows mass production parts to be used that are available at low cost.
  • roller body has offset bearing ends. This reduces the number of components and makes assembly and storage costs cheaper.
  • FIG. 1 shows a longitudinal section through a rocker arm of the type according to the invention.
  • FIG. 2 shows a plan view of a rocker arm according to FIG. 1;
  • FIG. 3 shows a section through a rocker arm of the type according to the invention in the installed state
  • FIG. 4 detail IV of Fig. 3;
  • FIG. 5 shows a section in the direction of arrow V of the detail from FIG. 4;
  • Fig. 6 is a three-dimensional partial view of the individual parts of a rocker arm of the type according to the invention.
  • the rocker arm 1 consists of a deep-drawn sheet, the contours and recesses of which are punched out.
  • the deep-drawn sheet is then formed, in which the two side parts 3 are bent perpendicularly to stiffen the strip 18.
  • the recess 8 serves to receive the ball nut and the bearing pin, and the roller body bed 5 serves to accommodate the roller body and the guide disk 4. After the shaping, the heat treatment takes place around the rocker arm to give better strength and surface properties.
  • Fig. 2 shows a plan view of the rocker arm 1 of the type according to the invention, the same parts being provided with the same reference numerals.
  • the roller body 10 is shown in FIG. 2, which is arranged in the roller body bed 5 between the guide disks 4.
  • the rocker arm heat-treated by nitriding, carburizing or case hardening accommodates the roller body 10 in the roller body bed 5, which is freely rotatably mounted between the guide disks 4.
  • Fig. 3 shows a section of the rocker arm 1 of FIG. 1 in the installed state.
  • the ball nut 11, a counter pin 12, a valve tappet 13, a valve 14, a valve spring 15, the housing 16, the bearing pin 17, the valve guide 19 and the valve seat 20 can be seen.
  • the tappet 13 is driven via the camshaft, not shown, and is received in the tappet receptacle 6 with its hemispherical end 21. Due to the up and down movement of the plunger 13, the rocker arm 1 is tilted around the ball nut 11, which is received in the spherical bearing bed 2. The ball nut 11 is fixed on the bearing pin 17. Due to the tilting movement, the roller body (not shown) accommodated in the roller body bed 5 presses on the valve stem 22 of the valve 14. During the downward movement, the spring 15 is compressed and the roller body rolls on the valve stem 22. As a result, the valve 14 moves out of the valve seat 20 and thus opens. The Upward movement of the rocker arm 1 is supported by the spring force of the spring 15. Furthermore, lifting of the roller body 10 from the valve tappet 13 is prevented. By re-rolling the roller body, not shown, there is virtually no frictional loss when the valve stem moves up and down.
  • FIG. 4 shows detail IV from FIG. 3, the guide function of the guide disk 4, which comprises the valve stem 22 on both sides, being clearly recognizable. This prevents the rocker arm 1 from rotating and stabilizes the rocker arm about its longitudinal axis.
  • FIG. 5 shows a sectional view of the detail from FIG. 4 in the direction of arrow V.
  • the side walls 3 and the guide disks 4 as well as the roller body 10 and the valve stem 22 can be seen.
  • the roller body 10 is in this case freely rotatable in the roller body bed 5, it being fitted into the roller body bed 5 such that only a very slight play remains through the guide disks 4. Due to the lateral inclusion of the valve stem 22 between the guide disks 4 and the support function generated thereby, a twisting of the rocker arm is effectively avoided.
  • Fig. 6 shows an exploded view of a rocker arm of the type according to the invention, in which the side parts 3, the roller body 5 and the roller body 10 and the guide disks 4 are shown.
  • the guide disks 4 are first placed on the stepped bearing ends of the cylindrical roller body 10. Then these parts are loose in the slot bearing 5 of the rocker arm 1 plugged in. Due to the pressure of the valve tappet 13 resulting from the spring force of the valve spring 15, the roller body 10 with the guide disks 4 is held in the roller body bed 5, thereby preventing the roller body from being lifted out of the bed during operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

L'invention concerne un culbuteur (1) pour la commande de soupapes d'un moteur à combustion interne, ledit culbuteur étant réalisé à partir d'une tôle d'emboutissage estampée, emboutie puis traitée à chaud. Ce culbuteur est caractérisé en ce qu'il présente des parties latérales opposées (3) entre lesquelles un corps de roulement (10) est logé de façon à pouvoir tourner.
EP97918952A 1996-08-05 1997-08-01 Culbuteur pour moteur a combustion interne Expired - Lifetime EP0853716B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19631653 1996-08-05
DE19631653A DE19631653A1 (de) 1996-08-05 1996-08-05 Kipphebel für eine Brennkraftmaschine
PCT/EP1997/004209 WO1998005850A1 (fr) 1996-08-05 1997-08-01 Culbuteur pour moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP0853716A1 true EP0853716A1 (fr) 1998-07-22
EP0853716B1 EP0853716B1 (fr) 2000-03-15

Family

ID=7801881

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97918952A Expired - Lifetime EP0853716B1 (fr) 1996-08-05 1997-08-01 Culbuteur pour moteur a combustion interne

Country Status (5)

Country Link
US (1) US6003482A (fr)
EP (1) EP0853716B1 (fr)
JP (1) JPH11514068A (fr)
DE (2) DE19631653A1 (fr)
WO (1) WO1998005850A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19816020A1 (de) 1998-04-09 1999-10-14 Volkswagen Ag Schlepphebel
US6302075B1 (en) * 2000-01-07 2001-10-16 Delphi Technologies, Inc. Roller finger follower shaft retention apparatus
DE10330882A1 (de) * 2003-07-09 2005-01-27 Ina-Schaeffler Kg Verfahren zur Herstellung eines Außenhebels eines schaltbaren Schlepphebels
DE10330881A1 (de) 2003-07-09 2005-01-27 Ina-Schaeffler Kg Verfahren zur Herstellung eines Außenhebels eines schaltbaren Schlepphebels
DE102004028667A1 (de) * 2004-06-12 2005-12-29 Ina-Schaeffler Kg Hebelartiger Nockenfolger
DE102005046897A1 (de) * 2005-09-30 2007-04-05 Schaeffler Kg Kipphebel eines Ventiltriebs einer Brennkraftmaschine
DE102007012734A1 (de) * 2007-03-16 2008-09-18 Schaeffler Kg Kipphebel für einen Ventiltrieb einer Brennkraftmaschine
DE102007019934A1 (de) 2007-04-27 2008-11-06 Daimler Ag Kipphebel für die Ventilsteuerung einer Brennkraftmaschine
JP2010144621A (ja) * 2008-12-18 2010-07-01 Yamabiko Corp オーバーヘッドバルブ式エンジンの動弁装置
DE102010018712B4 (de) * 2010-04-29 2022-01-20 Audi Ag Ventiltrieb für ein Gaswechselventil mit Wälzkontakt zwischen Nockenfolger und Ventilschaft
DE102012219506A1 (de) * 2012-10-02 2014-04-03 Schaeffler Technologies Gmbh & Co. Kg Hebelartiger Nockenfolger
DE102013205533A1 (de) 2013-03-28 2014-10-02 Schaeffler Technologies Gmbh & Co. Kg Verfahren zur Montage eines Ventiltrieb einer Brennkraftmaschine
JP6700089B2 (ja) * 2016-04-08 2020-05-27 株式会社オティックス ロッカアーム
CN106968739B (zh) * 2017-05-11 2022-08-05 杭州新坐标科技股份有限公司 一种轻量化高强度的柴油机滚轮摇臂

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1644750A (en) * 1925-02-18 1927-10-11 Gen Motors Res Corp Valve-operating means
FR614387A (fr) * 1926-04-12 1926-12-13 Ets Ballot Sa Perfectionnements apportés aux culbuteurs de commande pour soupapes de moteurs
US1802330A (en) * 1929-05-24 1931-04-28 Aeromarine Plane & Motor Compa Valve mechanism
DE2819356A1 (de) * 1978-05-03 1979-11-08 Bayerische Motoren Werke Ag Schwinghebel fuer den ventiltrieb von brennkraftmaschinen
US4829647A (en) * 1987-12-14 1989-05-16 Ford Motor Company Method of making low friction finger follower rocker arms
US4848180A (en) * 1988-09-06 1989-07-18 Henley Manufacturing Corporation Low-friction, boat-type rocker arm
US4944257A (en) * 1989-09-27 1990-07-31 Henley Manufacturing Holding Company, Inc. Cold-formed rocker arm with bearing flanges and splash plate
JPH0586817A (ja) * 1991-09-30 1993-04-06 Fuji Oozx Kk エンジンバルブ駆動用ローラロツカアーム
JP2805409B2 (ja) * 1992-01-07 1998-09-30 三菱自動車工業株式会社 板金ローラロッカアームとその製造方法
US5273005A (en) * 1993-03-11 1993-12-28 General Motors Corporation Enlarged shaft roller lifter with retention means

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9805850A1 *

Also Published As

Publication number Publication date
EP0853716B1 (fr) 2000-03-15
JPH11514068A (ja) 1999-11-30
DE59701254D1 (de) 2000-04-20
WO1998005850A1 (fr) 1998-02-12
DE19631653A1 (de) 1998-02-12
US6003482A (en) 1999-12-21

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