EP0969184A1 - Galet suiveur de came et sa méthode d'assemblage - Google Patents

Galet suiveur de came et sa méthode d'assemblage Download PDF

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Publication number
EP0969184A1
EP0969184A1 EP99111003A EP99111003A EP0969184A1 EP 0969184 A1 EP0969184 A1 EP 0969184A1 EP 99111003 A EP99111003 A EP 99111003A EP 99111003 A EP99111003 A EP 99111003A EP 0969184 A1 EP0969184 A1 EP 0969184A1
Authority
EP
European Patent Office
Prior art keywords
bolt
roller
recess
cam follower
walls
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Withdrawn
Application number
EP99111003A
Other languages
German (de)
English (en)
Inventor
Michael Deneke
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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 Volkswagen AG filed Critical Volkswagen AG
Publication of EP0969184A1 publication Critical patent/EP0969184A1/fr
Withdrawn legal-status Critical Current

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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
    • 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 cam follower, in particular for an internal combustion engine with a two basic bodies spaced apart from one another, a role and a bolt bearing this according to the preamble of the claim 1.
  • the invention further relates to a method for mounting a cam follower the preamble of claim 6.
  • DE 44 44 479 A1 discloses a generic cam follower in the form of a rocker arm in a valve train of an internal combustion engine.
  • This has a base body, consisting essentially of largely parallel walls spaced apart from one another and openings arranged therein, aligned with one another and receiving a bolt.
  • a roller facing a control cam is rotatably mounted on this bolt.
  • the bolt has an at least partially circumferential recess in which a locking element designed as a thrust washer engages.
  • This document shows a way of deviating from the usual fastening of the bolt by caulking or riveting, whereby it is proposed to arrange a thrust washer arranged between a lateral end face of the roller and the adjacent inner surface of a wall.
  • this also serves as an axial securing of the bolt, in which it is provided with radially expandable regions which engage in a groove-like recess in the bolt.
  • This thrust washer is provided with separate retaining lugs in order to achieve a tight fit of the bolt over the entire service life of the cam follower, thereby preventing the bolt from rotating in a circumferential direction.
  • a disadvantage of this arrangement may be that, while maintaining the entire width of the cam follower in the area of the roller, the roller is at least reduced in width by the amount of the thrust washer, which reduces its load-bearing capacity, or that, while maintaining this load-bearing capacity, the Base body of the cam follower in the area of the roller is widened at least by the amount of the thrust washer.
  • the invention has for its object to provide a generic cam follower that has a high load capacity with compact dimensions. Furthermore, a method for assembling a cam follower is to be specified.
  • the roller has an axial extension which Distance between the walls except for the function necessary for the rotation of the roll Column completely bridged and the locking element either in the area of the axial Extension of the roller or arranged in the region of the axial extension of a wall is.
  • the locking element is accommodated in the area of the axial extension of the roller in one of its side faces this recess receiving recess, for example in the form of a recess, is arranged.
  • the axial extension of the needles forming a free space is less than the axial Extension of the role.
  • the recess is formed by the free space.
  • a method for assembling a cam follower it is provided according to the invention to first insert the locking element into a recess assigned to the roller or an inner surface of a wall, then insert the roller between the walls, then use an expanding means, for example in the form of a dome which is conically shaped on one side to insert an opening in a wall until the locking element in the recess is expanded radially by the expansion means, then to bring the bolt carrying the roller through an opening in a wall up to the frontal contact with the expansion means and then to bring this expansion means out while tracking the bolt, the locking element radially widened by the expanding means being displaced relative to the latter until the bolt is pushed through the locking element and this locking element is inserted into the recess of the bolt with partial radial relaxation changes when it is pushed into the area of the recess.
  • an expanding means for example in the form of a dome which is conically shaped on one side to insert an opening in a wall until the locking element in the recess is expanded radially by the expansion
  • cam follower according to the invention and the assembly method according to the invention of a cam follower are preferably used on internal combustion engines, again in this case preferably in the area of valve drives for the periodic transmission of camshafts caused periodic opening movements for gas exchange valves.
  • the invention is used in all other, highly loaded and role-loaded Applications on internal combustion engines, for example in roll-loaded machines Tappets in the course of valve drives or drive devices for injection elements from Fuel injection systems, such as injection pumps.
  • a cam follower in the form of a rocker arm 1 which is only partially shown in the course of a valve train of an internal combustion engine, consists essentially of a base body 2, with walls 4 and 5 arranged essentially parallel to one another with a spacing 3.
  • the walls 4, 5 each have an opening 6, 7, which are aligned with one another and receive a bolt 8.
  • This bolt 8 is rotatably supported in the openings 6.7 in slide bearings 9.
  • the bolt 8 also carries a groove running in the present example as a full circumference 10 formed recess 11. In this groove 10 engages a standing under radial prestress Locking element 12, shown here in the form of a snap ring, for axially securing the Bolt 8 relative to the base body 2.
  • a bolt which is periodically acted upon by a cam, not shown, is rotatable on the bolt 8 Roller 13 mounted, for example with a plain bearing, Figure 3, or with the intermediation of Rolling elements 30 of a roller bearing 31, for example a needle bearing, FIG. 4.
  • the axial extent of this roller 13 in the longitudinal direction of the bolt 8 almost corresponds the distance 3 between the walls 4 and 5.
  • Roll 13 opposite the walls 4 and 5 functionally necessary column 14.
  • the locking element 12 is in Area of this axial extension of the roller 13 is arranged.
  • One of the walls supports this 5 facing side surface 15 of the roller 13 a recess receiving the locking element 12 16, for example produced by a turn.
  • the second embodiment according to FIG. 2 carries this recess 16 on an inner surface 17 of the wall 5.
  • the recess 16 in the course of producing the Base body 2, for example, also made as a recess or as an impression.
  • FIG. 4 shows the previously explained embodiments using a roller bearing 31 roller 13 supported on the bolt 8.
  • the roller 13 is above the longitudinal axis 32 the second embodiment is shown with the recess 16 in the wall 5.
  • the axial Extension of rolling elements 30 designed as needles largely corresponds to this the axial extension of the roller 13. With a suitable choice of diameter of the needles tarnishing of these rolling elements 30 to the locking element 12 is reliably avoided.
  • the first embodiment is shown below the longitudinal axis 32, the recess here 16 while avoiding a twist to be introduced into the roller 13 as free space 22 is formed.
  • This free space 22 arises between the inner surface 17, bolt 8, Roller 13 and needles shortened relative to roller 13.
  • the installation of the prescribed cam follower is carried out as follows. After the base body 2 has been provided, the latching element 12 is inserted into the recess 16, initially without radial preload. Then the roller 13 is pushed between the walls 4 and 5. In this phase of assembly, the snap ring, locking element 12, has an inner diameter that is smaller than the diameter of the bolt 8 and larger than that of the groove 10.
  • an expanding means 18 in the form of a dome 20 provided with a conical surface 19 is then preferably inserted through the opening 7 of the wall 5 for the roller-mounted design. The conical surface 19 expands the locking element 12 radially, this having sufficient space for this in the recess 16.
  • the mandrel 20 fixes pre-assembled rolling elements 30 in the roller 13.
  • the conical surface 19 is adjoined by a cylindrical surface which essentially corresponds to the bolt 8.
  • This expanding means 18 is then pushed out by pushing the bolt 8 into the opening 7 to the left, FIG. 3.
  • the mandrel 20 is thus pushed under the locking element 12, which is axially secured against displacement by abutment against the wall 4.
  • Bolt 8 and mandrel 20 lie against each other on the end face.
  • the bolt 8 is finally pushed into the locking element 12 until the recess 11 comes into the region of the recess 16. If this is the case, the latching element 12 relaxes radially in part and engages in the groove 10 in a form-fitting manner.
  • the mandrel 20 is now removed and can be used for another cam follower.
  • a spreading means 18 can be used Use expanding mandrel, not shown. This is, for example, according to FIG. 3 Automatically inserted into the opening 6 from the left and with the radial expansion of the locking element 12 spread. Then from the right through the opening 7 of the bolt 8 to inserted to the front end of the expanding mandrel, then by pushing the Bolt 8 led out of the expanding mandrel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP99111003A 1998-07-01 1999-06-10 Galet suiveur de came et sa méthode d'assemblage Withdrawn EP0969184A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19829269 1998-07-01
DE19829269A DE19829269A1 (de) 1998-07-01 1998-07-01 Nockenfolger und Verfahren zur Montage eines Nockenfolgers

Publications (1)

Publication Number Publication Date
EP0969184A1 true EP0969184A1 (fr) 2000-01-05

Family

ID=7872557

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99111003A Withdrawn EP0969184A1 (fr) 1998-07-01 1999-06-10 Galet suiveur de came et sa méthode d'assemblage

Country Status (2)

Country Link
EP (1) EP0969184A1 (fr)
DE (1) DE19829269A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2928409A1 (fr) * 2008-03-06 2009-09-11 Skf Ab Culbuteur pour moteur a combustion interne
FR2998614A1 (fr) * 2012-11-29 2014-05-30 Skf Ab Suiveur de came avec dispositif anti-rotation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004046599A1 (de) * 2004-09-25 2006-04-20 Ina-Schaeffler Kg Verfahren zur Montage eines schaltbaren Schlepphebels und schaltbarer Schlepphebel
DE102007018686A1 (de) 2007-04-20 2008-10-23 Schaeffler Kg Nockenfolgerlagervorrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0573674A1 (fr) 1992-01-07 1993-12-15 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Culbuteur a roulette et procede de fabrication associe
DE4337952A1 (de) * 1993-11-06 1995-05-11 Schaeffler Waelzlager Kg Nockenfolger für einen Ventiltrieb einer Brennkraftmaschine
DE4444447A1 (de) 1994-12-06 1996-06-13 Hemafa Matratzenfab Gmbh Matratze
DE19549223A1 (de) * 1995-12-30 1997-07-03 Bosch Gmbh Robert Brennkraftmaschine
US5706770A (en) * 1994-04-06 1998-01-13 Ina Walzlager Schaeffler Kg Valve drive of an internal combustion engine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3466073A (en) * 1967-10-12 1969-09-09 Crane Eng Co Inc Locked assembly
GB1290691A (fr) * 1969-01-23 1972-09-27
US3969954A (en) * 1975-06-23 1976-07-20 Dehne Wilfried E Index drive system cam follower assembly
US4089234A (en) * 1977-03-15 1978-05-16 Caterpillar Tractor Co. Anti-rotating guide for reciprocating members
DE3302762A1 (de) * 1982-08-11 1984-02-16 Kokan Kako Co., Ltd., Yokohama, Kanagawa Verfahren zur befestigung eines bauteils am aussenumfang eines rohrs
DE3300032A1 (de) * 1983-01-03 1984-07-05 Klöckner-Humboldt-Deutz AG, 5000 Köln Rollenstoessel fuer einen ventiltrieb einer hubkolbenbrennkraftmaschine
DE19548808A1 (de) * 1995-12-27 1997-07-03 Mwp Mahle J Wizemann Pleuco Gm Übertragungselement, insbesondere Rollenstößel zur Betätigung eines Ventils für insbesondere einen Verbrennungsmotor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0573674A1 (fr) 1992-01-07 1993-12-15 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Culbuteur a roulette et procede de fabrication associe
DE4337952A1 (de) * 1993-11-06 1995-05-11 Schaeffler Waelzlager Kg Nockenfolger für einen Ventiltrieb einer Brennkraftmaschine
US5706770A (en) * 1994-04-06 1998-01-13 Ina Walzlager Schaeffler Kg Valve drive of an internal combustion engine
DE4444447A1 (de) 1994-12-06 1996-06-13 Hemafa Matratzenfab Gmbh Matratze
DE19549223A1 (de) * 1995-12-30 1997-07-03 Bosch Gmbh Robert Brennkraftmaschine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2928409A1 (fr) * 2008-03-06 2009-09-11 Skf Ab Culbuteur pour moteur a combustion interne
FR2998614A1 (fr) * 2012-11-29 2014-05-30 Skf Ab Suiveur de came avec dispositif anti-rotation
WO2014083174A1 (fr) * 2012-11-29 2014-06-05 Aktiebolaget Skf Suiveur de came avec dispositif anti-rotation
CN104822908A (zh) * 2012-11-29 2015-08-05 Skf公司 具有抗旋转装置的凸轮随动件
CN104822908B (zh) * 2012-11-29 2018-05-08 Skf公司 具有抗旋转装置的凸轮随动件
US10260614B2 (en) 2012-11-29 2019-04-16 Aktiebolaget Skf Cam follower with anti-rotation device

Also Published As

Publication number Publication date
DE19829269A1 (de) 2000-01-05

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