EP1956198B1 - Culbuteur doté d'un corps profilé en tôle - Google Patents

Culbuteur doté d'un corps profilé en tôle Download PDF

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Publication number
EP1956198B1
EP1956198B1 EP08150587A EP08150587A EP1956198B1 EP 1956198 B1 EP1956198 B1 EP 1956198B1 EP 08150587 A EP08150587 A EP 08150587A EP 08150587 A EP08150587 A EP 08150587A EP 1956198 B1 EP1956198 B1 EP 1956198B1
Authority
EP
European Patent Office
Prior art keywords
lever body
longitudinal
longitudinal webs
rocker arm
transverse beam
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.)
Expired - Fee Related
Application number
EP08150587A
Other languages
German (de)
English (en)
Other versions
EP1956198A1 (fr
Inventor
Van Hau Nguyen
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.)
IHO Holding GmbH and Co KG
Original Assignee
Schaeffler 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 Schaeffler KG filed Critical Schaeffler KG
Priority to PL08150587T priority Critical patent/PL1956198T3/pl
Publication of EP1956198A1 publication Critical patent/EP1956198A1/fr
Application granted granted Critical
Publication of EP1956198B1 publication Critical patent/EP1956198B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01L2001/187—Clips, e.g. for retaining rocker arm on pivot
    • 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

Definitions

  • the invention relates to a drag lever for actuating a charge cycle of an internal combustion engine controlling Tellerhubventils.
  • the rocker arm has an elongated lever body formed from sheet material, which forms a substantially U-shaped and upwardly open cross-sectional profile in the region of a valve-side end portion with spaced-apart side walls and a crossbar connecting the side walls.
  • On a Tetierhubventill facing the underside of the cross bar extends a valve actuating surface which is lined by two serving for lateral guidance of the lever body on the shaft of the Tellerhubventils longitudinal webs, which are bent as an extension of the crossbar of this starting on the bottom, and the lever body has in one Central portion of a limited by an inner longitudinal end face of the crossbeam opening.
  • Such a drag lever goes out of the class considered as generic DE 195 43 657 A1 out.
  • the rocker arm proposed there has a lever body with longitudinal webs, which extend as an extension of the crossbar of the valve-side longitudinal end face of the lever body and bent by about 180 ° to the underside of the crossbar.
  • the present invention is therefore the object of a drag lever of the type mentioned in such a way that the disadvantages are eliminated by simple means.
  • the drag lever is intended to have the lowest possible moment of inertia around its pivot point and, with respect to the sheet metal forming process, improved material utilization, in particular with constant or improved guiding properties on the shaft of the disk lifting valve.
  • the longitudinal webs should be bent starting from the inner longitudinal end side of the crossbeam on the underside thereof, wherein the plate height of the longitudinal webs is smaller than the plate height of the crossbeam.
  • Another advantage of the finger lever according to the invention relates to the Blechumform remedies because now originate on the one hand, the longitudinal webs of the opening in the central portion of the lever body, while according to the cited prior art, the material corresponding to the opening in its entirety obtained as punching waste.
  • the material corresponding to the opening in its entirety obtained as punching waste.
  • this distance is no longer due to the functional length of the longitudinal webs is predetermined.
  • the said material thickness ratio of longitudinal webs and crossbeams is particularly advantageous in view of reducing the shear forces occurring during punching of the opening on both the tool and the workpiece, since the longitudinal webs at this stage of Blechumformreaes still unbent in the opening and a corresponding profiled and thus highly stressed punching tool is required.
  • the local reduction of the sheet height in the region of the later resulting opening then takes place in a punching preceded forming step, in which the still existing in the region of the opening at this time sheet material is preferably reduced by embossing in its material thickness.
  • the longitudinal webs are welded at their end portions to the underside.
  • attachment options are cohesive connections, such as bonding or soldering of the longitudinal webs to the underside, or a form-fitting acting in the transverse direction of the rocker arm support, such as outside on the bottom extending steps or projections on which the longitudinal webs are supported in each case to the outside.
  • the opening serves as clearance for a roller, which supported on a aligned in alignment pin bosses of the side walls bolt by means of either Rolling elements is stored.
  • Wälztagss to the cam can still be provided a rigid sliding surface which extends opposite the opening in the region of an upper side of the lever body.
  • the rocker arm according to the invention can of course also be part of a fully variable mechanical valve control, in which he does not immediately with the cam, but with other Hubübertragungsgliedern, for example in the form of an intermediate lever arranged between the cam and the cam lever cooperates.
  • the longitudinal webs should have a variable in the longitudinal direction of the lever body clearance, which is smaller than the shaft diameter of the Tellerhubventils in the region of the inner longitudinal end face of the crossbar.
  • Such shaped longitudinal webs serve not only the lateral guidance of the lever body on the shaft of the Tellerhubventils, but also as a longitudinal stop, which can prevent a leaking of the drag lever of its pivot bearing in the direction of the Tellerhubventils under extreme operating conditions of the internal combustion engine.
  • Such a leaking of the finger lever which can lead to considerable damage to the complete destruction of the internal combustion engine, occurs mainly with the use of pivot bearings with hydraulic valve clearance compensation and insufficient pressure medium supply, such.
  • FIG. 1 is an inventive drag lever 1 for actuating a charge cycle of an internal combustion engine controlling, but not shown here Tellerhubventils disclosed in a perspective bottom view.
  • the symmetrical to its longitudinal central plane drag lever 1 has a one-piece, formed from sheet metal and elongated lever body 2 with a valve-side end portion 3 and a joint-side end portion 4 and is about a dome-shaped socket 5 in a known manner on a likewise not shown here, stationary in the Internal combustion engine arranged pivot bearing with spherical condyle supported pivotally.
  • a clipped on lever body 2 retaining clip 6 is provided to summarize the drag lever 1 and the pivot bearing in a known manner to a captive mounting unit.
  • valve-side end portion 3 and the hinge-side end portion 4 are connected to each other by two spaced-apart side walls 7.
  • the side walls 7 have in a central portion 8 of the lever body 2 mutually aligned pin bosses 9, in which a roll 10 bearing bolt 11 is supported.
  • the bolt 11 is fixedly connected in a known manner by end-side caulking of its ends with the lever body 2.
  • FIGS. 2 to 4 it can be seen forms the lever body 2 in the region of the valve-side end portion 3 with the side walls 7 and a crossbar 12 connecting them a substantially U-shaped and upwardly open cross-sectional profile.
  • a Tellerhubventil 13 facing bottom 14 of the crossbar 12, a valve actuating surface 15 which is lined by two longitudinal webs 16.
  • the longitudinal webs 16 serve the lateral guidance of the lever body 2 on the shank of the Tellerhubventils 13, since the cam follower 1 is known to be secured neither on its pivotal mounting nor serving on its serving as a drive roller 10 against rotation about the vertical axis.
  • FIG. 1 Like it out FIG.
  • FIG. 2 in which the drag lever 1 and the here formed as a support element with hydraulic valve clearance compensation pivot bearing 17 in longitudinal section, the shaft of the Tellerhubventils 13 and a roller 10 actuating cam 18 are shown, is particularly clear, which are about 180 ° on the bottom 14th of the crossbar 12 curved longitudinal webs 16 formed as an extension of the crossbar 12 and go according to the invention of an inner longitudinal end face 19 of the crossbar 12 from.
  • the inner longitudinal end face 19 delimits an opening 20 extending in the middle section 8 of the lever body 2, which also ensures the clearance of the roller 10 within the lever body 2.
  • FIG. 2 is also apparent that the roller 10 is mounted by means of rolling elements 21, here in the form of a needle set on the bolt 11.
  • the longitudinal webs 16 a cranked in the longitudinal direction of the lever body 2 course with variable clear distance 22, which is smaller in the region of the inner longitudinal end face 19 of the lever body 2 as in FIG. 2 drawn in and in FIG. 3 hatched diameter shown 23 of the Tellerhubventils 13 is hatched.
  • This longitudinal stop not just a complete one Prevent jumping off of the finger lever 1, but also its provision in the working position according to FIG. 2 support.
  • the lever body 2 is shown in a late intermediate stage of Blechumformreaes in plan view and in longitudinal section.
  • the lever body 2 with the molded joint socket 5 the U-shape upturned side walls 7 including pin bosses 9 and with its longitudinal profile already extensive Endkonture forum.
  • the longitudinal webs 16 functionally a considerable elongated length, which previously corresponds to the longitudinal distance of the prepared in a step process and initially contiguous lever body 2. Due to the fact that the longitudinal webs 16 now initially extend within the opening 20, the longitudinal spacing of the lever bodies 2 and consequently the stamping waste arising in the region of the longitudinal spacing can also be significantly reduced in favor of lower production costs.
  • FIG. 6 To increase the service life of the E-shaped profiled punching tool, it is according to FIG. 6 provided to reduce the original plate thickness in the region of the opening 20 by a stamping of the opening 20 upstream embossing step, so that the denoted 26 sheet height of the longitudinal webs 16 is smaller than the original sheet thickness largely corresponding plate height 27 of the crossbar 12.
  • this measure will not only reduces the shear forces during the stamping process, but also facilitates the subsequent bending of the longitudinal webs 16 on the underside 14 of the crossbar 12 and also allows a smaller bending radius in the region of 180 ° bend.

Landscapes

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

Claims (4)

  1. Culbuteur (1) pour l'actionnement d'une soupape en champignon (13) commandant le changement de charge d'un moteur à combustion interne, avec un corps de culbuteur (2) allongé façonné en matériau en tôle, qui forme dans la région d'une portion d'extrémité (3) du côté de la soupape, avec des parois latérales (7) s'étendant à distance l'une de l'autre et une poutre transversale (12) reliant les parois latérales (7), un profilé de section transversale essentiellement en forme de U et ouvert vers le haut, une surface d'actionnement de soupape (15) s'étendant sur un côté inférieur (14) de la poutre transversale (12) tourné vers la soupape en champignon (13), laquelle est ourlée par deux nervures longitudinales (16) servant au guidage latéral du corps de culbuteur (2) sur la tige de la soupape en champignon (13), lesquelles nervures longitudinales (16) sont cintrées sur le côté inférieur (14) depuis la poutre transversale (12) en tant que prolongement de celle-ci, et le corps de culbuteur (2) présentant, dans une portion centrale (8), une ouverture (20) limitée par un côté frontal longitudinal interne (19) de la poutre transversale (12), caractérisé en ce que les nervures longitudinales (16) sont cintrées depuis le côté frontal longitudinal interne (19) de la poutre transversale (12) sur son côté inférieur (14), la hauteur de tôle (26) des nervures longitudinales (16) étant inférieure à la hauteur de tôle (27) de la poutre transversale (12).
  2. Culbuteur (1) selon la revendication 1,
    caractérisé en ce que les nervures longitudinales (16) sont soudées au côté inférieur (14) au niveau de leurs portions d'extrémité (25).
  3. Culbuteur (1) selon la revendication 1,
    caractérisé en ce que l'ouverture (20) sert de passage pour un rouleau (10) qui est monté sur un boulon (11) supporté dans des billets de boulon (9) en alignement l'un avec l'autre des parois latérales (7), éventuellement au moyen de corps de roulement (21).
  4. Culbuteur (1) selon la revendication 1,
    caractérisé en ce que les nervures longitudinales (16) présentent une distance intérieure (22) variable dans la direction longitudinale du corps de culbuteur (2), qui, dans la région du côté frontal longitudinal interne (19), est inférieure au diamètre (23) de la tige de la soupape en champignon (13).
EP08150587A 2007-02-10 2008-01-24 Culbuteur doté d'un corps profilé en tôle Expired - Fee Related EP1956198B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08150587T PL1956198T3 (pl) 2007-02-10 2008-01-24 Dźwignia zaworowa z elementem dźwigniowym ukształtowanym z blachy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007006695A DE102007006695A1 (de) 2007-02-10 2007-02-10 Schlepphebel mit einem aus Blechwerkstoff umgeformten Hebelkörper

Publications (2)

Publication Number Publication Date
EP1956198A1 EP1956198A1 (fr) 2008-08-13
EP1956198B1 true EP1956198B1 (fr) 2010-05-12

Family

ID=39272319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08150587A Expired - Fee Related EP1956198B1 (fr) 2007-02-10 2008-01-24 Culbuteur doté d'un corps profilé en tôle

Country Status (3)

Country Link
EP (1) EP1956198B1 (fr)
DE (2) DE102007006695A1 (fr)
PL (1) PL1956198T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022112027A1 (de) 2022-05-13 2023-11-16 Schaeffler Technologies AG & Co. KG Nockenfolger aus Stahlblech für einen Ventiltrieb einer Brennkraftmaschine

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008046186A1 (de) * 2008-09-06 2010-03-11 Schaeffler Kg Verfahren zur Herstellung eines Schlepphebels
DE102011007451A1 (de) 2011-04-15 2012-10-18 Schaeffler Technologies AG & Co. KG Schlepphebel eines Ventiltriebs
DE102011076727A1 (de) 2011-05-30 2012-12-06 Schaeffler Technologies AG & Co. KG Schlepphebel eines Ventiltriebs
CN103953409A (zh) * 2014-04-08 2014-07-30 杭州新坐标科技股份有限公司 用于连接滚轮摇臂和液压挺柱的球头锁片
DE102016223822A1 (de) 2016-11-30 2018-05-30 Schaeffler Technologies AG & Co. KG Schlepphebel für einen Ventiltrieb einer Brennkraftmaschine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19543657C2 (de) 1995-11-23 1998-07-02 Schaeffler Waelzlager Ohg Spanlos geformter Schlepp- oder Kipphebel
KR100368631B1 (ko) * 1995-11-23 2003-04-10 아이엔에이 뵐즈라거 쉐플러 오하게 비절삭가공에의해성형된로커암또는핑거레버
DE19617668C2 (de) * 1995-11-23 2003-11-20 Ina Schaeffler Kg Spanlos geformter Schlepp- oder Kipphebel
DE19652676A1 (de) * 1996-12-18 1998-06-25 Schaeffler Waelzlager Ohg Betätigungshebel für einen Ventiltrieb einer Brennkraftmaschine
DE19717991A1 (de) * 1997-04-28 1998-10-29 Schaeffler Waelzlager Ohg Spanlos geformter Schlepphebel
DE19743479A1 (de) * 1997-10-01 1999-04-08 Schaeffler Waelzlager Ohg Schwenkbarer Nockenfolger
DE19743488A1 (de) * 1997-10-01 1999-04-08 Bayerische Motoren Werke Ag Zylinderkopf mit Ventilsteuerung für eine Brennkraftmaschine
DE19750206A1 (de) * 1997-11-13 1999-05-20 Schaeffler Waelzlager Ohg Spanlos geformter Schlepphebel
DE19811658B4 (de) 1998-03-18 2006-01-26 Ina-Schaeffler Kg Schwenkbarer Nockenfolger eines Ventiltriebs einer Brennkraftmaschine
DE10030341C2 (de) * 2000-06-20 2003-04-10 Ina Schaeffler Kg Verfahren zur Herstellung eines hebelartigen Nockenfolgers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022112027A1 (de) 2022-05-13 2023-11-16 Schaeffler Technologies AG & Co. KG Nockenfolger aus Stahlblech für einen Ventiltrieb einer Brennkraftmaschine

Also Published As

Publication number Publication date
DE502008000625D1 (de) 2010-06-24
EP1956198A1 (fr) 2008-08-13
PL1956198T3 (pl) 2010-10-29
DE102007006695A1 (de) 2008-08-21

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