EP3901427A1 - Corps de couvercle pour rotateur de soupape, rotateur de soupape correspondant et procédé de fabrication du corps de couvercle - Google Patents

Corps de couvercle pour rotateur de soupape, rotateur de soupape correspondant et procédé de fabrication du corps de couvercle Download PDF

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Publication number
EP3901427A1
EP3901427A1 EP21167812.3A EP21167812A EP3901427A1 EP 3901427 A1 EP3901427 A1 EP 3901427A1 EP 21167812 A EP21167812 A EP 21167812A EP 3901427 A1 EP3901427 A1 EP 3901427A1
Authority
EP
European Patent Office
Prior art keywords
spring element
connecting piece
axial spring
cover body
annular
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
EP21167812.3A
Other languages
German (de)
English (en)
Other versions
EP3901427B1 (fr
Inventor
Antonius Wolking
Arief LUTHFI
Florian Ringeling
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.)
Federal Mogul Valvetrain GmbH
Original Assignee
Federal Mogul Valvetrain GmbH
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 Federal Mogul Valvetrain GmbH filed Critical Federal Mogul Valvetrain GmbH
Publication of EP3901427A1 publication Critical patent/EP3901427A1/fr
Application granted granted Critical
Publication of EP3901427B1 publication Critical patent/EP3901427B1/fr
Active 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
    • F01L1/32—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for rotating lift valves, e.g. to diminish wear
    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group
    • 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
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • F01L1/462—Valve return spring 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
    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/10—Connecting springs to valve members

Definitions

  • the present invention relates to a cover body for a valve rotating device for internal combustion engines, a corresponding valve rotating device and a method for producing the cover body.
  • valve turning devices To prevent an uneven load on the valves of an internal combustion engine in the circumferential direction, the valves must rotate continuously during operation. The rotation prevents one-sided wear and deposits on the valve seat. The same temperature distribution in the circumferential direction is also achieved. If the "natural" rotation of the valves is too small, forced turning devices, so-called valve turning devices, are used.
  • Valve rotating devices generate a valve rotation in that balls, which are arranged in pockets in a base body and which are in contact with a disc spring, are forced to roll on inclined raceways that are formed in the pockets and thus rotate the base body and disc spring relative to one another around the valve axis.
  • the plate spring is connected to a cover by means of a friction fit, which at the same time supports the valve spring.
  • the rotation can take place either during the valve opening stroke or during the valve closing stroke.
  • Versions at the top ie the valve rotating device is located on the side of the valve spring facing away from the combustion chamber, and versions located below, ie the valve rotating device is located on the side of the valve spring facing the combustion chamber, are possible.
  • the base body has a conical opening into which conical pieces are inserted, which hold the valve at the end of the shaft.
  • the Base body on the cylinder head and the rotation is transmitted to the valve via the valve spring.
  • the invention relates to a cover body for a valve rotating device, comprising an annular upper part and an annular lower part, the upper part and the lower part being axially spaced apart and being able to accommodate an axial spring element between them, the upper part and the lower part being connected to one another by at least one connecting piece are, wherein the at least one connecting piece is arranged at the point opposite an insertion position of the axial spring element.
  • the advantage of the cover body according to the invention is that it can be manufactured in a few work steps while saving material, thereby reducing manufacturing costs.
  • the at least one connecting piece radially outside the introduced axial spring element is arranged.
  • the advantage of the arrangement is that the inserted axial spring element is not hindered in its function.
  • the at least one connecting piece is arranged laterally outside the edge on the lower part. Due to the arrangement laterally outside the edge on the lower part, material is saved.
  • the at least one connecting piece is arranged laterally outside the edge on the upper part. Due to the arrangement laterally outside the edge on the upper part, material is saved.
  • the at least one connecting piece is arranged within a space which is spanned by the cross sections of the upper part and the lower part.
  • the advantage of arranging the at least one connecting piece within this spanned space is a more compact design.
  • the at least one connecting piece releasably connects the upper part and the lower part.
  • a releasable connection of the upper part and the lower part ensures simple replacement of the axial spring element by disassembling the cover body.
  • the at least one connecting piece has at least 2 connecting pieces that are spaced apart from one another. This has the advantage that the load is more evenly distributed.
  • the at least one connecting piece has at least 3 connecting pieces that are spaced apart from one another. This has the advantage that the load is even more evenly distributed.
  • the upper part and the lower part are formed integrally or in one piece with the at least one connecting piece.
  • the advantage of an integral or one-piece construction is that few work steps are necessary in the production.
  • the cover body can be produced from sheet metal, for example, by punching and bending.
  • the upper part has at least 2 axial projections for guiding at least one valve spring. This offers a simple adaptation for possible variations of the valve spring guide.
  • the upper part has at least 1 recess for guiding at least one valve spring.
  • the advantage of a recess for guiding at least one valve spring is further material savings.
  • the upper part and the lower part are flat disc-shaped bodies made of metal.
  • the advantage of flat, disc-shaped bodies is that they can be punched without problems.
  • a valve rotating device which is equipped with the cover body according to the invention. It comprises an annular base body which has a plurality of pockets oriented in a circumferential direction, in each of which a ball and a tangential spring are arranged, the pockets having a variable depth in the circumferential direction, so that inclined raceways are formed for the balls arranged therein Tangential springs press the balls in the direction of one end of the respective pocket, a cover body according to one of the preceding claims, wherein the axial spring element is annular and a first end of the axial spring element is supported on an annular stop surface of the base body and a second end of the axial spring element is supported on a surface of the Supported upper part, wherein a surface of the lower part, which faces away from the axial spring element, rests against the balls, and wherein the balls and the axial spring element are arranged overlapping in the radial direction.
  • valve rotating device according to the invention is that it can be produced in a simple and material-saving manner, thereby reducing production costs.
  • a method for producing a cover body for a valve rotating device comprising punching a metal sheet which, after punching, has two ring-shaped parts which are connected to one another by at least one connecting piece, the punched metal sheet being bent into a cover body is convicted.
  • the method according to the invention has the advantage that few work steps have to be carried out to produce a cover body.
  • the stamped metal sheet has at least two connecting pieces that are spaced apart from one another. At least 2 spaced apart connecting pieces have the advantage that the load is more evenly distributed.
  • the stamped metal sheet has at least 3 connecting pieces which are spaced apart from one another. At least 3 spaced-apart connecting pieces have the advantage that the load is evenly distributed.
  • the stamped metal sheet has at least 2 projections for guiding at least one valve spring, which are brought into a position by bending that is oriented substantially 90 ° to the upper part. This offers a simple adaptation for possible variations of the valve spring guide.
  • the stamped metal sheet has at least 1 recess for guiding at least one valve spring.
  • the advantage of a recess for guiding at least one valve spring is further material savings.
  • Fig. 1 shows a cover body 2 according to an embodiment of the invention.
  • the cover body 2 comprises an annular, disk-shaped upper part 4, an annular, disk-shaped lower part 6, as well as connecting pieces 8 and 8 ′ and 4 projections 10.
  • the upper part 4 and the lower part 6 are axially spaced apart and are connected to one another by the bead-like connecting piece 8.
  • the connecting piece 8 'and a further connecting piece 8' (not visible) have an L-shaped shape, are arranged laterally on the lower part 6 and are aligned by bending in the direction of the upper part 4 and connected to it.
  • the connecting pieces 8 and 8 ' are arranged in such a way that an axial spring element can be passed between them, the connecting pieces 8 and 8' being welded, screwed or riveted to the counterpart when or as required.
  • projections 10 are shown which are punched out, cut or sawn. These are bent axially outwards at 90 ° and guide the valve spring. Alternatively, a recess (not shown) on the upper part 4 can guide the valve spring.
  • Fig. 2 shows a further cover body 2 'according to another embodiment, in which the upper part 4' is connected to the lower part 6 'by a plurality of spaced-apart connecting pieces 8 ".
  • the connecting pieces 8" are only on one Ring half arranged to ensure the acceptance of an axial spring element 24 on a side opposite to the connecting pieces 8 ′′, extend in an edge region of the space between upper part 4 'and lower part 6' and are welded or screwed to the counterpart as required or riveted.
  • Fig. 3 shows yet another cover body 2 ′′ according to yet another embodiment, in which the connection of upper part 4 ′′ and lower part 6 ′′ is designed in the form of several connecting pieces 8 ′′ which are spaced apart from one another and are arranged laterally on upper part 4 ′′ and by bending in the direction of the lower part 6 ′′.
  • the connecting pieces 8 ′′ ′′ are welded, screwed or riveted to the counterpart at or as required.
  • projections 10 ′′ are shown, which are punched out, cut or sawn. These are axially aligned by bending and guide the valve spring. Alternatively, a recess (not shown) on the upper part 4 'can take over the guidance of the valve spring.
  • Fig. 4 shows a valve rotating device according to the invention in an axial section, ie an axis of the valve rotating device lies in the cutting plane.
  • the valve rotating device comprises an annular base body 22, an annular cover body 2 and an annular axial spring element 24.
  • An overhead version is shown.
  • the base body 22 is provided with a conical opening into which cone pieces can be inserted which are suitable for holding a valve.
  • An underlying version is also possible.
  • a conical opening is then not necessary, only an opening through which the stem of a valve can run.
  • a plurality of pockets 16 are incorporated into the base body 22 in the circumferential direction, which are oriented in the circumferential direction and each extend over a certain angular range in the circumferential direction (perpendicular to the plane of the drawing).
  • a depth of the pockets 16 (that is to say the extent of the pockets in the axial direction) is variable in the circumferential direction, so that an inclined raceway 26 is formed in each of the pockets 16, cf. Fig. 5 .
  • In each of the pockets 16 are a ball 14 and a tangential spring 32, cf. Fig. 5 , arranged, wherein the ball can roll on the inclined track 26.
  • a diameter of the balls 14 should be greater than the smallest depth of the pockets 16.
  • all balls 14 have the same diameter and all pockets 16 have the same dimensions.
  • the tangential springs 32 press the balls 14 in the circumferential direction against a respective end of the pockets 16, namely against the end at which the corresponding pocket 16 has its smallest depth.
  • the base body 22 also has a stop surface 18 on which a first end of the axial spring element 24 is supported, the stop surface 18 preferably being located radially (that is, in a direction perpendicular to the axis) further inward than the pockets 16 Storage 20 is arranged, which allows low-friction rotation of the base body 22 and the axial spring element 24 about the axis, relative to one another.
  • the axial spring element 24 is arranged in the axial direction between the upper part 4 and the lower part 6, a second end of the axial spring element 24 being supported on a surface of the upper part 4. In the radial direction, the axial spring element 24 is arranged further inward than the connecting piece 8.
  • the axial spring element 24 causes a spring force in the axial direction that may press the base body 22 and cover body 2 apart, since the first end of the axial spring element 24 is against the stop surface 18 of the base body 22 supports.
  • the axial spring element 24 and the balls 14 are arranged so as to overlap in the radial direction.
  • the axial spring element 24 and the balls 14 are arranged next to one another in the axial direction, the lower part 6 being located between the axial spring element 24 and the balls 14. Overall, the sequence in the axial direction is preferred: upper part 4, axial spring element 24, lower part 6, balls 14, or in other words overlap these four parts in the radial direction.
  • a plate spring is preferably used as the axial spring element 24.
  • a surface of the lower part 6 facing away from the axial spring element 24 rests against the balls 14, which are arranged in the pockets 16 of the base body 22. If the base body 22 and cover body 2 are pressed together against the force of the axial spring element 24, e.g. during the opening stroke of the valve, an axial force is exerted on the balls 14, which then roll on the one hand on the inclined raceways 26 in the pockets 16 and on the other hand on the axial spring element roll away from the surface of the lower part 6. As a result, the base body 22 and the cover body 2 are rotated relative to one another about the axis. When the valve rotating device is relieved, e.g. during the closing stroke of the valve, the axial spring element 24 pushes the base body 22 and the cover body 2 apart again, the force on the balls 14 becoming smaller and the balls not rolling when they are reset by the tangential springs 32 will.
  • the rolling of the balls 14 does not take place on the plate spring 24, but on the lower part 6.
  • the lower part 6, can be designed more simply in accordance with the rolling loads that occur, since it does not have to assume a spring function at the same time.
  • the choice of the axial spring element 24, in particular a plate spring 24, is not restricted by the rolling loads, so a more flexible design of the axial spring element 24 is made possible.
  • This also enables a compact, space-saving design of the valve rotating device. Since the plate spring 24 is completely inserted into the cover body 2, the complete lifting movement of the plate spring 24 is converted into a rotary movement via the inclination of the pockets 16. Compared to previous designs, this means that the rotary movement per stroke can be increased by around 1.5 to 2 times. Alternatively, if the rotation is unchanged, a more rigid plate spring 24 with an increased service life can be used.
  • the surface of the lower part 6 facing away from the axial spring element 24 can have a ball raceway, thereby reducing the rolling pressure on the lower part 6, for example.
  • the surface of the upper part 4 facing away from the axial spring element 24 is preferably designed to serve as a support surface for a valve spring.
  • FIG. 16 is a partial circumferential sectional view showing a pocket 16 with an inclined track 26.
  • a ball 14 and a tangential spring 32 are arranged, which presses the ball 14 against the end of the pocket 16 at which the pocket 16 has its smallest depth.
  • a section of the lower part 6, which rests against the ball 14, can also be seen.
  • the base body 22, cf. Fig. 4 , and lower part 6 moved towards each other, so that the ball 14 rolls both on the inclined track 26 and on the surface of the lower part 6 and thus rotates the base body 22 relative to the cover body 2 about the axis.
  • Fig. 6 shows a sheet metal 28 with a punched contour 30.
  • the punched contour 30 has two ring-shaped parts, on the one hand the upper part 4 and on the other hand the lower part 6, which are connected by the connecting piece 8 and wherein the upper part 4 has a larger outer diameter than the lower part 6 .
  • the upper part 4 has projections 10 which are directed inward and are bent in the axial direction to guide a valve spring
  • the lower part 6 has connecting pieces 8 'which are directed outward and bent in the axial direction for connection to the upper part 4 are provided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Taps Or Cocks (AREA)
  • Check Valves (AREA)
EP21167812.3A 2020-04-23 2021-04-12 Corps de couvercle pour rotateur de soupape, rotateur de soupape correspondant et procédé de fabrication du corps de couvercle Active EP3901427B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020111090.1A DE102020111090A1 (de) 2020-04-23 2020-04-23 Deckelkörper für ventildrehvorrichtung, entsprechende ventildrehvorrichtung und verfahren zur herstellung des deckelkörpers

Publications (2)

Publication Number Publication Date
EP3901427A1 true EP3901427A1 (fr) 2021-10-27
EP3901427B1 EP3901427B1 (fr) 2023-05-31

Family

ID=75477916

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21167812.3A Active EP3901427B1 (fr) 2020-04-23 2021-04-12 Corps de couvercle pour rotateur de soupape, rotateur de soupape correspondant et procédé de fabrication du corps de couvercle

Country Status (4)

Country Link
US (1) US11788440B2 (fr)
EP (1) EP3901427B1 (fr)
DE (1) DE102020111090A1 (fr)
PL (1) PL3901427T3 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1569887A (en) * 1922-07-15 1926-01-19 Charles E Sargent Poppet-valve rotator
US20100186690A1 (en) * 2009-01-29 2010-07-29 Wolck John G Valve rotator assembly
DE102011003212A1 (de) * 2011-01-26 2012-07-26 Schaeffler Technologies Gmbh & Co. Kg Kipphebel
US8714184B1 (en) * 2011-02-17 2014-05-06 Bronislaw B. Florek Caged ball and spring valve rotator
DE102017126541B3 (de) 2017-11-13 2018-11-22 Federal-Mogul Valvetrain Gmbh Ventildrehvorrichtung für Verbrennungsmotoren

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624323A (en) * 1950-07-22 1953-01-06 Thompson Prod Inc Valve rotating assembly
US2686508A (en) * 1952-03-04 1954-08-17 Thompson Prod Inc Valve rotating device
US2875740A (en) 1955-08-29 1959-03-03 James M Leake Stamped valve rotator cage
DE1955820B1 (de) * 1969-11-06 1971-08-26 Teves Thompson Gmbh Vorrichtung zum Drehen eines Tellerventils fuer Brennkraftmaschinen
DE2053325A1 (de) 1970-10-30 1972-05-04 Daimler Benz Ag, 7000 Stuttgart Vorrichtung zum Erzeugen einer Dreh bewegung bei einem Ventil einer Brenn kraftmaschine
DE2152346A1 (de) 1971-10-21 1973-04-26 Schaeffler Ohg Industriewerk Vorrichtung zum drehen eines ventils
US3890943A (en) * 1972-12-12 1975-06-24 Teves Thompson Gmbh Valve rotating devices
US4075987A (en) * 1975-04-23 1978-02-28 Trw Inc. Valve rotator
US4141325A (en) * 1976-12-23 1979-02-27 Trw Inc. Valve rotator
US4154424A (en) * 1977-01-24 1979-05-15 Trw Inc. Valve rotator
GB2040399B (en) * 1979-01-11 1983-01-26 Fjr Eng Ltd Valve rotator
DE3006240A1 (de) 1980-02-20 1981-08-27 Robert Bosch Gmbh, 7000 Stuttgart Pleuel
US4538558A (en) * 1980-12-10 1985-09-03 Trw Inc. Valve rotating device
DE10015417A1 (de) * 2000-03-28 2001-01-25 Michael Engesser Ventildrehvorrichtung
DE10059545B4 (de) 2000-11-30 2021-05-06 Schaeffler Technologies AG & Co. KG Verfahren zur Herstellung eines hebelartigen Nockenfolgers sowie Blechrohling in Form einer Platine zur Bildung eines hebelartigen Nokkenfolgers
EP2294288A1 (fr) 2008-06-18 2011-03-16 Koyo Bearings USA, LLC Dispositif de raccordement
DE102012223469B4 (de) 2012-12-17 2014-11-20 Continental Automotive Gmbh Verbindungselement und Herstellungsverfahren für ein Verbindungselement
DE102013214246A1 (de) 2013-07-22 2015-01-22 Schaeffler Technologies Gmbh & Co. Kg Verfahren zur Herstellung eines Axiallagers für die Lagerung einer Läuferwelle eines Turboladers und Axiallager

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1569887A (en) * 1922-07-15 1926-01-19 Charles E Sargent Poppet-valve rotator
US20100186690A1 (en) * 2009-01-29 2010-07-29 Wolck John G Valve rotator assembly
DE102011003212A1 (de) * 2011-01-26 2012-07-26 Schaeffler Technologies Gmbh & Co. Kg Kipphebel
US8714184B1 (en) * 2011-02-17 2014-05-06 Bronislaw B. Florek Caged ball and spring valve rotator
DE102017126541B3 (de) 2017-11-13 2018-11-22 Federal-Mogul Valvetrain Gmbh Ventildrehvorrichtung für Verbrennungsmotoren

Also Published As

Publication number Publication date
EP3901427B1 (fr) 2023-05-31
DE102020111090A1 (de) 2021-10-28
US20210332724A1 (en) 2021-10-28
PL3901427T3 (pl) 2023-12-04
US11788440B2 (en) 2023-10-17

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