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EP1510661B1 - Dispositif de rotation de soupape - Google Patents

Dispositif de rotation de soupape Download PDF

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Publication number
EP1510661B1
EP1510661B1 EP20040018832 EP04018832A EP1510661B1 EP 1510661 B1 EP1510661 B1 EP 1510661B1 EP 20040018832 EP20040018832 EP 20040018832 EP 04018832 A EP04018832 A EP 04018832A EP 1510661 B1 EP1510661 B1 EP 1510661B1
Authority
EP
European Patent Office
Prior art keywords
rotating device
valve rotating
base body
ball
spring
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 - Lifetime
Application number
EP20040018832
Other languages
German (de)
English (en)
Other versions
EP1510661A1 (fr
Inventor
Klaus Dr.-Ing. Gebauer
Valentina Suknjaic
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.)
ZF Automotive Germany GmbH
Original Assignee
TRW Automotive 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 TRW Automotive GmbH filed Critical TRW Automotive GmbH
Priority to EP06010947A priority Critical patent/EP1705344B1/fr
Publication of EP1510661A1 publication Critical patent/EP1510661A1/fr
Application granted granted Critical
Publication of EP1510661B1 publication Critical patent/EP1510661B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01L1/32—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

Definitions

  • the invention relates to a valve rotating device with a base body, a cover, at least one ball, which is arranged between the base body and the lid, and at least one return spring.
  • valve rotator is known for example from German Patent 19 24 128. It serves to turn valves of an internal combustion engine, in particular the exhaust valves, slightly on each actuation about its own axis, so that in particular a more uniform temperature and a more uniform wear result.
  • the valve rotator is based on the fact that the ball is supported on an inclined ball track in the base body on which the ball unrolls upon actuation of the valve. This rolling movement is converted into a rotation of the lid relative to the base body.
  • a main body return spring is needed, which is arranged between the cover and the base body and these acted upon at a predetermined distance from each other.
  • a plate spring is used.
  • a ball return spring is required, which acts on the ball in an initial position in which the main body and the lid are held at a maximum distance from each other.
  • a coil spring is usually used.
  • a valve rotating device which uses as a restoring element a spring washer made of steel, which is provided with a plurality of spring arms.
  • a valve rotating device in which a plate spring made of steel is used as the return spring. Furthermore, a damping element is provided in the form of a rubber disc.
  • GB-A-594,828 and DE-A-1 924 128 show valve rotors in which a plate spring is used as the return spring.
  • the disadvantage of the known return springs is that it can come by dynamic loads and also by overstressing to a failure of the return spring.
  • disc springs there is also the problem that high requirements in terms of geometric accuracy as well as the corresponding heat treatment must be met in order to meet the prescribed function exactly. This leads to high production costs.
  • the base body in the area in which the diaphragm spring rolls in operation on this must be performed with a particularly high surface quality in order to prevent damage during operation.
  • As a constructive disadvantage of the use of disc springs results in that changes in a deformation of the plate spring and the force introduction direction during the stroke, which makes the use of a ball race necessary for highly loaded valve rotors.
  • the problem with ball return springs is that they are very susceptible to high dynamic loads. Also, the ball return spring can be crushed at impact loads.
  • the object of the invention is to develop a valve rotating device of the type mentioned in that results in a higher reliability at low cost. Furthermore, a compact design possible to be achieved so that either the valve rotating device itself can be made more compact or then additionally available space can be used constructively advantageous.
  • a valve rotating device is provided with a base body, a lid, at least one ball which is arranged between the base body and the lid, and at least one return spring, which is arranged between the base body and the lid to to act on these in the axial direction in an initial state relative to each other, characterized in that the return spring is an elastomeric spring.
  • An elastomer spring is much less sensitive to dynamic Charges. Nor does it place particularly high demands on the surface quality of the surfaces on which it is supported.
  • return springs made of an elastomer can be made very compact.
  • the elastomer spring forms the return spring, the main body return spring, which is arranged between the base body and the lid, wherein it is preferably annular.
  • a return spring can act on the base body and the cover in the axial direction away from each other with little effort, so that after actuation of the valve rotation device again the starting position is reached.
  • a valve rotating device is provided with a base body, a lid, at least one ball which is disposed between the base body and the lid, and at least one return spring which acts on the ball to this in to act on a starting position, characterized in that the return spring is an elastomeric spring.
  • the ball return spring can act either in the tangential direction or in the axial direction.
  • FIGS. 1 to 5 show a valve rotating device according to a first embodiment.
  • the valve rotation device is arranged between a valve to be actuated, for example an outlet valve of an internal combustion engine, and the component actuating this, for example a rocker arm.
  • the valve rotation device has a main body 10, in which two groove-shaped recesses 12 are formed, in each of which a plurality of balls are arranged.
  • the bottom of each recess 12 consists of several Kugelabstütz inhabit 16 which are slightly inclined relative to a plane perpendicular to the central axis M of the base 10 level.
  • a ball support surface 16 is associated with a ball 14 which bears against this.
  • the adjacent Kugelabstützbericht 16 go directly into each other, so that in section a sawtooth profile is formed (see for example Figure 2).
  • the balls 14 are supported on a cover 18, which is similar to an axial roller bearing provided with a ball track 20.
  • a return spring 22 is arranged, which is annular and consists of an elastomer.
  • the return spring could also be composed of several circular segments, which are easier to produce from a closed ring.
  • the return spring 22 acts on the lid 18 away from the main body 10 in a starting position, which is predetermined by a retaining ring 24.
  • the return spring 22 is located on the lid 18 directly and is fixed there, while it is supported on the main body 10 via a sliding ring 26. This allows a rotation of the main body 10 relative to the return spring 22nd
  • All balls 14 of a recess 12 are connected to each other by a ball holder 28, as it is known in principle from a rolling bearing.
  • Each ball holder extends in the illustrated embodiment over an angular range of slightly less than 180 °.
  • Each ball holder 28 is associated with a restoring device 30, which is designed here as a magnet. With its magnetic attraction force, the magnet draws its associated ball holder 28 towards itself, causing the balls 14 to be acted upon to the right with respect to FIG. 5, that is to roll on their associated ball support surfaces 16 in a direction in which the cover 18 is pushed away from the base body 10 , This corresponds to the starting position, in which the base body 10 has the maximum distance from the lid 18.
  • a particular advantage of the embodiment described lies in the elastomer return spring 22, which acts between the base body 10 and the lid 18. This is insensitive to dynamic loads, in terms of surface quality of the lid 18 and against possible overload.
  • One Another advantage of this embodiment is that only two restoring devices 30 are used to return all balls 14 in the starting position. In the prior art, a separate return device is usually used for each ball, so that the individual balls must have a comparatively large distance from each other. In the described embodiment, the balls can be arranged with a very small distance from each other, so that there is a particularly high load capacity. If this high load capacity is not required, smaller balls could be used, so that a more compact design can be realized. Finally, it is even conceivable to arrange the balls 14 in a single recess 12, which then extends over approximately 360 ° or, if the restoring device 30 is arranged laterally, can also be designed to be circumferential.
  • the return spring 22 can be relatively freely integrated between the base body 10 and the lid 18.
  • the necessary spring characteristic can be set either constructively or via the material used for the return spring 22.
  • the return spring is no longer subject to Hertzian pressure. Due to the design and arrangement of the return spring, the force generated always acts perpendicular to the balls.
  • Kugelabstütz vom 16 Since the Kugelabstütz vom 16 are part of a groove with "wavy ground", they can be much cheaper produce than conventional recesses, which are assigned to a single ball.
  • FIGS. 6 and 7 schematically show a valve rotating device according to a second embodiment.
  • the same reference numerals are used, and reference is made to the above explanations in this respect.
  • each ball 14 is associated with a separate return spring 32.
  • This is designed as a spring tab which is cut out of a spring ring 34 which is arranged on the base body 10.
  • Each return spring 32 acts on a return element 36, which is designed as a displaceable in the base 10 bolts.
  • the central axis of the return elements 36 is approximately perpendicular to the Kugelabstützamide 16 and thus extends slightly obliquely to the central axis M.
  • each return element 36 with an inclined support surface 38, which is aligned so that the ball 14 in its initial position is charged.
  • the particular advantage of the second embodiment is that the return springs 32 can not be destroyed by overload. Even if the balls 14 via the dashed lines in Figure 7, actuated Be postponed position to the right, the return spring 32 is biased only slightly further.
  • the spring tabs can be structurally easily configured so that they have a sufficient elasticity for this purpose.
  • FIGS. 8 and 9 a valve rotating device according to a third embodiment is shown.
  • the same reference numerals are used, and reference is made to the above embodiments in this respect.
  • return springs 32 are used as elastomeric blocks in the third embodiment.
  • the return springs 32 are arranged in a bore in the base body 10 and are supported on a retaining ring 40, which is fastened to the base body 10. These act on restoring elements 36, which consist of metal and engage the corresponding ball 14.
  • the return springs 32 act approximately in the axial direction, while in the first embodiment, the restoring device 30 is effective in the circumferential direction.
  • FIG. 10 shows a valve rotating device according to a fourth embodiment.
  • Components are the same reference numerals, and reference is made in this regard to the above explanations.
  • the return spring 32 is effective in the tangential direction (or at least the restoring force has a tangential component) and not in approximately the axial direction, as in the third and also in the second embodiment.
  • the return spring 32 is here a conical elastomer block, which is supported on a metallic support surface 38, which is designed as a cap or plate, directly to the ball 14 and this applied to its initial position.
  • the advantage of the fourth embodiment over the prior art is that the return spring 32 is insensitive to dynamic loads.

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

Claims (15)

  1. Dispositif de rotation de soupape, comportant un corps de base (10), un couvercle (18), au moins une bille (14) qui est agencée entre le corps de base et le couvercle, et au moins un ressort de rappel (22) qui est agencé entre le corps de base (10) et le couvercle (18) pour solliciter ceux-ci l'un par rapport à l'autre en direction axiale dans un état initial, caractérisé en ce que le ressort de rappel est un ressort en élastomère (22).
  2. Dispositif de rotation de soupape selon la revendication 1, caractérisé en ce que le ressort de rappel (22) est de forme annulaire.
  3. Dispositif de rotation de soupape selon la revendication 1, caractérisé en ce que le ressort de rappel (22) est composé par plusieurs segments de cercle.
  4. Dispositif de rotation de soupape selon l'une des revendications 1 à 3, caractérisé en ce que le ressort de rappel (22) prend appui sur une bague de glissement (26).
  5. Dispositif de rotation de soupape selon la revendication 4, caractérisé en ce que la bague de glissement (26) est agencée sur le corps de base (10).
  6. Dispositif de rotation de soupape, comportant un corps de base (10), un couvercle (18), au moins une bille (14) qui est agencée entre le corps de base et le couvercle, et au moins un ressort de rappel (32) qui agit sur la bille (14) pour solliciter celle-ci jusque dans une position initiale, caractérisé en ce que le ressort de rappel est un ressort en élastomère (32).
  7. Dispositif de rotation de soupape selon la revendication 6, caractérisé en ce que le ressort de rappel (32) agit en direction approximativement axiale.
  8. Dispositif de rotation de soupape selon la revendication 6 ou la revendication 7, caractérisé en ce que le ressort de rappel (32) est formé par un bloc en élastomère pourvu d'une pointe métallique (38) qui est en appui sur la bille.
  9. Dispositif de rotation de soupape selon la revendication 6, caractérisé en ce que le ressort de rappel (32) agit au moins partiellement en direction tangentielle.
  10. Dispositif de rotation de soupape selon la revendication 9, caractérisé en ce que la bille (14) est agencée dans un évidement (12) dans le corps de base (10) et en ce que le ressort de rappel (32) est formé par un bloc en élastomère qui est agencé dans l'évidement (12).
  11. Dispositif de rotation de soupape selon la revendication 10, caractérisé en ce qu'il est prévu un dispositif de rappel (30) qui est formé par un aimant.
  12. Dispositif de rotation de soupape selon l'une des revendications 9 à 11, caractérisé en ce que le corps de base (10) présente au moins un évidement (12) dans lequel sont agencées plusieurs billes (14).
  13. Dispositif de rotation de soupape selon la revendication 12, caractérisé en ce que toutes les billes (14) sont réparties dans deux évidements (12) au maximum.
  14. Dispositif de rotation de soupape selon la revendication 12 ou al revendication 13, caractérisé en ce qu'il est prévu un porte-billes (28) pour plusieurs billes (14).
  15. Dispositif de rotation de soupape selon l'une des revendications 9 à 14, caractérisé en ce que le dispositif de rappel (30) ou le ressort de rappel (32) agit sur le porte-billes (28).
EP20040018832 2003-08-25 2004-08-09 Dispositif de rotation de soupape Expired - Lifetime EP1510661B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06010947A EP1705344B1 (fr) 2003-08-25 2004-08-09 Dispositif de rotation de soupape

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20313101U DE20313101U1 (de) 2003-08-25 2003-08-25 Ventildrehvorrichtung
DE20313101U 2003-08-25

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP06010947A Division EP1705344B1 (fr) 2003-08-25 2004-08-09 Dispositif de rotation de soupape

Publications (2)

Publication Number Publication Date
EP1510661A1 EP1510661A1 (fr) 2005-03-02
EP1510661B1 true EP1510661B1 (fr) 2007-01-24

Family

ID=30469980

Family Applications (2)

Application Number Title Priority Date Filing Date
EP06010947A Expired - Lifetime EP1705344B1 (fr) 2003-08-25 2004-08-09 Dispositif de rotation de soupape
EP20040018832 Expired - Lifetime EP1510661B1 (fr) 2003-08-25 2004-08-09 Dispositif de rotation de soupape

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP06010947A Expired - Lifetime EP1705344B1 (fr) 2003-08-25 2004-08-09 Dispositif de rotation de soupape

Country Status (2)

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EP (2) EP1705344B1 (fr)
DE (3) DE20313101U1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB594828A (en) * 1944-10-26 1947-11-20 Thompson Prod Inc Improved device for effecting relative rotation between parts under axial load, particularly for rotating poppet valves
US2662511A (en) * 1951-04-10 1953-12-15 Thompson Prod Inc Automatic mechanical clearance regulator
US2714375A (en) * 1952-09-04 1955-08-02 Carl R Hirschberger Tappet valve operating mechanism
US3534620A (en) * 1968-12-19 1970-10-20 Gen Motors Corp Valve rotator
DE1924128C3 (de) * 1969-05-12 1979-04-26 Teves-Thompson Gmbh, 3013 Barsinghausen Vorrichtung zum Drehen von Ventilen, vorzugsweise für Verbrennungskraftmaschinen
DE1955820B1 (de) * 1969-11-06 1971-08-26 Teves Thompson Gmbh Vorrichtung zum Drehen eines Tellerventils fuer Brennkraftmaschinen
US4094280A (en) * 1976-07-06 1978-06-13 Trw Inc. Valve rotating device
DE3635656A1 (de) * 1986-10-21 1988-04-28 Ecker Gmbh Maschbau Steuerventil der fluidtechnik
DE50011252D1 (de) * 2000-06-26 2005-11-03 Trw Deutschland Gmbh Ventildrehvorrichtung

Also Published As

Publication number Publication date
EP1705344A1 (fr) 2006-09-27
EP1510661A1 (fr) 2005-03-02
DE502004005300D1 (de) 2007-11-29
DE502004002745D1 (de) 2007-03-15
EP1705344B1 (fr) 2007-10-17
DE20313101U1 (de) 2004-01-15

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