EP2529089A1 - Déphaseur d'arbre à cames - Google Patents

Déphaseur d'arbre à cames

Info

Publication number
EP2529089A1
EP2529089A1 EP10795377A EP10795377A EP2529089A1 EP 2529089 A1 EP2529089 A1 EP 2529089A1 EP 10795377 A EP10795377 A EP 10795377A EP 10795377 A EP10795377 A EP 10795377A EP 2529089 A1 EP2529089 A1 EP 2529089A1
Authority
EP
European Patent Office
Prior art keywords
locking
cover
collar
camshaft adjuster
spring cover
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
EP10795377A
Other languages
German (de)
English (en)
Other versions
EP2529089B1 (fr
Inventor
Werner Wagner
Josef Janitschek
Mario Arnold
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG 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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2529089A1 publication Critical patent/EP2529089A1/fr
Application granted granted Critical
Publication of EP2529089B1 publication Critical patent/EP2529089B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
    • F01L2001/34483—Phaser return springs
    • 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

Definitions

  • the invention relates to a camshaft adjuster with a Verriegelungsde- disgust, wherein the locking cover has a substantially disc-shaped base, and extending in an axial direction, the base at least partially encircling collar for receiving a spring cover.
  • a camshaft adjuster of the aforementioned type is disclosed in DE 10 2006 002 993 A1.
  • the camshaft adjuster has a Verriegelungsde- disgust, which is made in one piece of a disc, an axial extension and a sprocket.
  • the extension of the locking cover is formed as a disk circulating collar.
  • a spring cover made of sheet metal is used in the interior formed by the collar. The spring cover is bent radially outboard and is deformed after insertion into the extension radially inwardly. The spring cover is thus under radial contact pressure of the inner bore of the extension.
  • a camshaft adjuster basically serves for the purposeful adjustment of the phase position between a camshaft and a crankshaft in an internal combustion engine.
  • a camshaft adjuster has a stator rotatably connected to the crankshaft and a rotor held in this stator.
  • the rotor is rotatably connected to the camshaft and can be adjusted relative to the stator.
  • About such an adjustment can in a predetermined angular range rotation of the camshaft relative to the stator can be achieved.
  • a locking lid is connected on the stator.
  • the locking cover seals the hydraulic chambers of the camshaft adjuster and can also be designed to hold a return spring.
  • the object of the invention is achieved by a camshaft adjuster with the feature combination according to claim 1.
  • a locking cover which has a substantially disk-shaped base surface, and an extending in an axial direction, the base at least partially encircling collar for receiving a spring cover.
  • the locking cover is in the present case made of sheet metal.
  • a locking cover as part of a camshaft adjuster must withstand high forces during operation.
  • the locking lid must withstand high oil pressures and, where appropriate, give sufficient rest to a return spring. So far, a locking lid is made by a person skilled in the art as a solid component.
  • the massive production brings high material costs as well as a high weight with it.
  • the invention surprisingly recognizes that, when providing an axially raised collar, the locking cover can be made of sheet metal without this being associated with a loss of the functionality of the camshaft adjuster.
  • the covenant of the locking lid which at least partially surrounds its base area, namely ensures the necessary dimensional stability.
  • the stability of the locking lid can be ensured even when installed and loaded condition.
  • the invention thus solves the previous prejudice of the art.
  • the base at least partially circumferential collar a sufficiently high component stiffness can be achieved.
  • the collar increases the flexural stiffness on the outer diameter of the locking lid so that it can withstand high forces.
  • the federal government can easily nes spring cover can be used.
  • the inner and / or outer lateral surface of the collar may be provided with a number of fasteners.
  • the collar can be used to attach, for example, other components.
  • the production of the locking cover is made of a sheet metal with a particularly low material costs and due to the low weight of the sheet metal locking lid can be made particularly easy.
  • a sheet metal is understood to mean a flat product made of metal which, for example, can result from a rolling process.
  • the locking cover can be made of a sheet with material thicknesses smaller than 3 mm.
  • the use of sheet metal thus allows the production of a weight-optimized locking lid.
  • the base of the locking lid is designed substantially disc-shaped. It may have a recess which serves in particular to receive a camshaft.
  • a locking slot for locking the rotor to the stator can be introduced into the base area.
  • this is further introduced an oil passage, which serves to supply the locking link with a hydraulic fluid, in particular oil.
  • bores are preferably formed in the base surface which can serve for fastening the locking cover to a stator.
  • the base surface of the locking cover for holding or fixing a return spring for example, be formed at a Federfußdazzling.
  • the return spring serves to rotate the rotor relative to the stator, so that the rotor, for example, when switching off the internal combustion engine, and thus with a drop in the oil pressure, can be brought to its initial or base position. In this way, the rotor and the stator are brought into the locking position
  • the locking lid is made as a sheet metal forming part.
  • Forming processes such as thermoforming processes are particularly suitable good for the production of metallic components, since these methods are well known and easy to perform. The production cost and the costs can be kept low accordingly.
  • a number of latching lugs oriented in the circumferential direction is preferably arranged on the collar.
  • the locking lugs are particularly impressed on the collar and can be used for easy attachment of another component. In this way, two movable components in the intended position can be set axially to each other.
  • the connection can come about a positive connection between the locking lugs and the respective fasteners on the second component, such as a spring cover, come about.
  • the locking lugs accordingly represent an axial trigger safety device for the spring cover over the circumference of the locking lid.
  • the or each latching lug is arranged on the inner circumferential surface of the collar. It can thus be arranged a further component such as a spring cover within the collar of the locking cover, including the spring cover has on its outer circumferential surface a number of corresponding positive locking elements.
  • These interlocking elements may be formed, for example, as webs in the circumferential direction, which are engaged behind in the mounted state of the locking lugs.
  • the spring cover can then be inserted axially into the collar of the locking cover in a simple manner and held there by the catch. As a result, the assembly is simplified.
  • centrifugal force can be exploited by the inner receptacle of the spring cover in the locking lid.
  • the collar of the spring cover is pressed by the rotational movement against the collar of the locking cover radially outward, so that the connection between the positive locking elements can not be solved in operation.
  • the or each locking lug is wedge-shaped in the circumferential direction.
  • the interconnected or paired parts can be additionally secured in right- or left-handed camshaft adjusters.
  • the locking connection offers the possibility of easy disassembly of a spring cover.
  • a number of each radially depressed pockets is arranged on the collar. The pockets serve to prevent rotation of another component, in particular a spring cover. In the pockets, for example, snap a positive connection element in the form of a nose and thus prevent the two interconnected components rotate against each other.
  • the or each pocket is advantageously arranged on the inner circumferential surface of the collar.
  • an inserted Federde- disgusting be caught by snapping arranged on the spring cover lugs in the pockets of the locking lid within the collar.
  • a locking link and an oil passage are introduced into the base of the locking cover.
  • the locking link serves for the non-rotatable locking of a rotor. It is introduced in particular in the form of a depression in the base of the locking lid.
  • a piston for locking so the form-fitting, mechanical connection of a rotor with a stator intervene.
  • the piston holds the rotor firmly in place.
  • the piston can be lifted out of the recess. This is done by applying the locking linkage with oil, for which purpose the oil passage is used.
  • the oil passage is introduced from the locking link spaced.
  • a number of substantially hollow-cylindrical nut supports are further embossed into the base surface.
  • Nuts can be pressed into the nut pads.
  • About pressed-in nuts can be in a simple way thread into the base of the locking lid. The threads serve to receive fastening elements, in particular screws, so that the locking cover can be connected to a stator.
  • the embossed nut supports further lead to improved perpendicularity of the threaded axis of the pressed nuts.
  • the camshaft adjuster comprises a spring cover with a substantially disc-shaped base, and with an extending in an axial direction, the base at least partially encircling collar, the spring cover with its collar in the collar of the locking cover - is set.
  • a spring cover may be connected in the installed state with a locking cover and serves in particular to hold a return spring.
  • the restoring spring can be fastened here under prestress on the locking cover, in particular on a retaining element or a spring base on the base surface of the locking cover. Due to the bias of the return spring this has a high restoring force and should accordingly be positioned between two components that hold the spring in shape.
  • the spring cover of the camshaft adjuster has on the outer circumferential surface of its collar on a number of cooperating with the collar of the locking cover positive locking elements.
  • the interlocking elements can be configured differently. In this case, it is provided in particular that they are designed to hold the spring cover in the locking cover, so that a firm connection with the locking cover is possible.
  • a latching connection between the spring cover and a locking cover may be provided.
  • the collar of the spring cover surrounds the base of the spring cover, which has a recess for receiving a camshaft, at least partially. This gives the spring cover stability because the collar increases the component stiffness of the spring cover and can compensate or prevent undesired deformations in the event of external forces.
  • the spring cover is made as a sheet metal forming part.
  • the use of sheet metal brings only low material costs with it and offers the possibility to produce the spring cover with a low weight.
  • forming processes are easy to perform. It therefore only requires a low production cost, so that the manufacturing cost can be kept low.
  • a circumferentially arranged radially outwardly directed web is provided as a form-fitting element of the spring cover.
  • the web is designed as a counterpart to a latching nose and thus serves to form a latching connection in particular to a locking cover, whereby a secure connection between the two components can be ensured.
  • the locking connection is an overall axial trigger safety for the spring cover.
  • a circumferentially formed nose is provided as a positive locking element of the spring cover.
  • the noses are designed such that they engage in pockets. fen, which are located in particular on the inner circumferential surface of a locking lid. The lugs can snap into the pockets and are thus secured against rotation of the spring cover and the locking lid against each other.
  • the spring cover In the assembled state, the spring cover is inserted axially into the collar of the locking cover and is held there.
  • the hold comes about in particular via a locking and snapping the arranged on the lateral surfaces of the coils positive locking elements.
  • the webs of the spring cover are advantageously engaged behind by the locking lugs of the locking cover and the lugs of the spring cover are snapped into the pockets of the locking lid.
  • This inner receptacle has the advantage that the catch connection between the latching lugs and the webs, as well as the connection between the lugs and the pockets, does not come loose during operation. For example, despite the action of centrifugal forces during operation, or by vibration of components to be secured, such as a return spring, a firm connection of the spring cover to a Verriegelungsde- disgust be guaranteed.
  • the number of interlocking elements which are designed as webs or pockets, variable. In particular, they correspond to the number of locking lugs and pockets on the collar of a locking cover.
  • Fig. 2 shows a camshaft adjuster with a spring cover in a three-dimensional representation
  • FIG. 3 shows a camshaft adjuster with a locking cover according to FIG. 1 and with a spring cover according to FIG. 2 in a three-dimensional representation.
  • Identical components in the individual exemplary embodiments are given the same reference numerals below.
  • Fig. 1 shows a locking cover 1 on a camshaft adjuster 2 with a disc-shaped base 3.
  • the camshaft adjuster 2 is schematically indicated in the form of a stator 4 on the locking cover 1 only.
  • the locking lid 1 can be seen in a three-dimensional representation.
  • the locking lid 1 is manufactured as a forming part.
  • the locking cover 1 consists of a thin sheet with a thickness of about 2.5 mm.
  • the disk-shaped base 3 has a collar 7 extending in an axial direction 5.
  • the collar 7 serves to receive a spring cover (not shown in FIG. 1).
  • a spring cover can be seen in a detailed embodiment of FIG.
  • the base 3 has a central recess 9. Within this recess 9, a camshaft can be received when installed.
  • a locking link 1 1 and a spaced therefrom oil passage 13 are introduced.
  • the locking link 1 1 is used in the installed state within a camshaft adjuster the rotationally fixed Locking a rotor with a stator.
  • the oil passage 13 is used to supply the locking link 1 1 oil. Due to the distance between the two, this supply of the locking slot 1 1 via the oil passage 13 is ensured only by a "supplementary" oil passage mounted on a rotor exists, an external leakage can be prevented.
  • the collar 7 rotates the base 3 of the locking lid 1 in full.
  • the locking lugs 19 are used to connect a spring cover, which can be received within the inner circumferential surface 17 of the locking cover 1.
  • the spring cover can form a latching connection with the locking lugs 19 via arranged on its collar positive locking elements, so that the two components are fixed axially to each other in the desired position.
  • the locking lugs 19 accordingly represent an axial trigger safety device for a spring cover over the circumference of the locking cover 1.
  • the locking lugs 19 are wedge-shaped in the circumferential direction. As a result, the spring cover and the locking cover 1 are additionally secured against removal of the spring cover.
  • each radially recessed pockets 21 is disposed on the inner circumferential surface 17.
  • the pockets 21 are in the collar 7 a lowered and thus offer the possibility that further positive locking elements of a spring cover engage in this. Such a connection serves to prevent rotation of a spring cover in the installed state.
  • an inserted into the locking cover 1 spring cover can thus be secured axially and in the circumferential direction.
  • the return cover is hereby usually secured under pretension on the locking cover 1 and is then held in position by a spring cover inserted into the locking cover 1.
  • a spring cover 31 for a phaser in a three-dimensional view can be seen.
  • the spring cover 31 has, like the locking cover in Fig. 1, a substantially disc-shaped base 33 with a central recess 35 for receiving a camshaft. It is also made of sheet metal with a thickness of about 0.5 mm as a sheet metal forming part.
  • the spring cover 31 is formed with an extending in the axial direction 5 collar 37 which rotates the base 33.
  • the spring cover 31 can be used with its collar 37 in the collar 7 of the locking lid 1 shown in Fig. 1.
  • a number of positive-locking elements 41 is arranged on the outer circumferential surface 39 of the collar 37. These form-fitting elements 39 are formed as webs 43 and 45 as lugs.
  • the spring cover 31 can be inserted axially in a simple manner in the collar 7 of the locking cover 1 and see there by the latching between locking lugs 19 and webs 43 are held.
  • the engagement of the lugs 35 in pockets 21 on the inner periphery of a locking cover secures the spring cover 31 against rotation.
  • a number of holes 47 are introduced in the base 33, through which the screw end of the screws can extend in the installed state, which connect the locking cover 1 with a stator 4. Additional holes 49 are used for weight reduction or axial withdrawal.
  • recesses 50 are introduced for the nut supports 15 of the locking cover 1 in the federal government.
  • the recesses 50 are located at the points where the nut supports 15 would come into contact with the collar 37 of the spring cover 31 during assembly and would prevent insertion of the spring cover. Through the recesses 50, the spring cover 31 can be easily inserted into the locking cover 1.
  • FIG. 1 shows a camshaft adjuster 2 with a locking cover 1 according to FIG. 1 and with a spring cover 31 according to FIG. 2.
  • the camshaft adjuster 2 is only schematically indicated here, whereas the locking cover 1 and the spring cover 31 are shown in a three-dimensional representation are. Both the locking cover 1 and the spring cover 31 are already described in detail in the two preceding figures, so that reference is made here to the description of these figures.
  • the spring cover 31 is inserted with its collar 37 in the collar 7 of the locking cover 1.
  • the webs of the spring cover 31 are engaged behind by the locking lugs 19 of the locking cover 1, so that a latching connection 53 between the locking lugs 19 and the webs 43 comes about.
  • the lugs 45 of the spring cover 31 are snapped into the pockets 21 of the locking cover 1 to form a positive connection 55.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

L'invention concerne un déphaseur d'arbre à cames (2) muni d'un couvercle de verrouillage (1) en tôle, le couvercle de verrouillage (1) présentant une surface de base (3) sensiblement en forme de disque, et un collet (7) s'étendant dans une direction axiale (5) et entourant au moins partiellement la surface de base (3), destiné à loger un couvercle à ressort (31). Le couvercle de verrouillage (1) peut être fabriqué de manière simple et économique grâce à sa réalisation en tôle ainsi qu'à un collet (7) relevé, et offre une résistance suffisamment importante malgré la faible épaisseur de matériau.
EP10795377.0A 2010-01-25 2010-12-20 Dephaseur d'arbre a cames Active EP2529089B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010005602A DE102010005602A1 (de) 2010-01-25 2010-01-25 Nockenwellenversteller
PCT/EP2010/070215 WO2011088939A1 (fr) 2010-01-25 2010-12-20 Déphaseur d'arbre à cames

Publications (2)

Publication Number Publication Date
EP2529089A1 true EP2529089A1 (fr) 2012-12-05
EP2529089B1 EP2529089B1 (fr) 2014-09-03

Family

ID=43618018

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10795377.0A Active EP2529089B1 (fr) 2010-01-25 2010-12-20 Dephaseur d'arbre a cames

Country Status (7)

Country Link
US (1) US8931446B2 (fr)
EP (1) EP2529089B1 (fr)
KR (1) KR20120118018A (fr)
CN (1) CN102725485B (fr)
BR (1) BR112012017813A2 (fr)
DE (1) DE102010005602A1 (fr)
WO (1) WO2011088939A1 (fr)

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DE102011004588A1 (de) * 2011-02-23 2012-08-23 Schaeffler Technologies Gmbh & Co. Kg Nockenwellensteller
DE102012206338B4 (de) * 2012-04-18 2021-06-02 Schaeffler Technologies AG & Co. KG Nockenwellenversteller mit Stator-Deckel-Einheit zur automatischen Einstellung eines Verriegelungsspiels
DE102012209137A1 (de) 2012-05-31 2013-12-05 Schaeffler Technologies AG & Co. KG Nockenwellenversteller
DE102013218031B4 (de) 2013-09-10 2020-09-17 Schaeffler Technologies AG & Co. KG Nockenwellenversteller und Federdeckel
WO2016133782A1 (fr) * 2015-02-20 2016-08-25 Schaeffler Technologies AG & Co. KG Modulateur de phase d'arbre à cames
US10167747B2 (en) 2016-10-28 2019-01-01 Schaeffler Technologies AG & Co. KG Sheet metal locking cover for a cam phaser
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US11268412B2 (en) * 2019-06-07 2022-03-08 SCHAEFFLER TECHOLOGIES AG & Co. KG Camshaft phaser

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Also Published As

Publication number Publication date
US20120291735A1 (en) 2012-11-22
US8931446B2 (en) 2015-01-13
WO2011088939A1 (fr) 2011-07-28
DE102010005602A1 (de) 2011-07-28
CN102725485A (zh) 2012-10-10
KR20120118018A (ko) 2012-10-25
BR112012017813A2 (pt) 2016-04-19
EP2529089B1 (fr) 2014-09-03
CN102725485B (zh) 2016-06-08

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