EP1806482A2 - Arbre à cames - Google Patents

Arbre à cames Download PDF

Info

Publication number: EP1806482A2
Authority: EP; European Patent Office
Prior art keywords: camshaft; coupling region; closing element; coupling; bearing shell
Prior art date: 2006-01-05
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

EP06126362A

Other languages

German (de)

English (en)

Other versions

EP1806482B1 (fr

EP1806482A3 (fr

Inventor

Martin Lechner

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.)

Mahle International GmbH

Original Assignee

Mahle International 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.)

2006-01-05

Filing date

2006-12-18

Publication date

2007-07-11

2006-12-18 Application filed by Mahle International GmbH filed Critical Mahle International GmbH

2007-07-11 Publication of EP1806482A2 publication Critical patent/EP1806482A2/fr

2009-04-08 Publication of EP1806482A3 publication Critical patent/EP1806482A3/fr

2010-06-16 Application granted granted Critical

2010-06-16 Publication of EP1806482B1 publication Critical patent/EP1806482B1/fr

Status Not-in-force legal-status Critical Current

2026-12-18 Anticipated expiration legal-status Critical

Links

Images

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
- F01L1/02—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
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49293—Camshaft making
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2101—Cams

Definitions

the invention relates to a camshaft for motor vehicle engines, in particular, having an end element arranged in / on the camshaft and fixedly connected to the camshaft, in accordance with the preamble of claim 1.
Such termination elements are well known and serve as an axial termination of the camshaft and as a drive element for a driven side arranged auxiliary unit.
end elements are made of solid material used, which are firmly connected to an axial end side of the camshaft and which are designed so that they meet the existing requirements for a torque to be transmitted long term.
the disadvantage here, however, that such end elements of solid material on the one hand are heavy and thereby increase a total weight of the camshaft or the engine and thus the motor vehicle and on the other hand consuming and thus expensive to manufacture.
the invention is concerned with the problem of improving a camshaft of the type mentioned above in that Overall, a weight-reduced camshaft can be created, which is also cheaper to produce.
the invention is based on the general idea, responsible for the transmission of the drive torque to an accessory final element, which is arranged axially in or on the camshaft and fixedly connected thereto, form as a sheet metal part.
a sheet metal part has in comparison to a made of solid material terminating element a significantly lower weight, which has a positive effect on an energy balance of the equipped with the camshaft according to the invention motor vehicle.
the production of a formed as a sheet metal part closure element is much easier and cheaper than a comparable end element made of solid material. It is also of particular advantage that such a closure element can be produced in virtually any shape without the need for costly changes to the production machines. It is sufficient, for example, a simple exchange of the punch and die in the appropriate forming tool. Trained as a sheet metal part closing element transmits the torque load occurring in such a way from the axial end portion of the camshaft on the accessory that the torque load occurring over the entire life the camshaft or the final element can be easily transferred.
the end element is punched, pulled and / or hardened.
Modern punching methods enable production of the terminating element according to the invention with low unit costs and high precision at the same time.
High manufacturing quality with low unit costs are nowadays crucial competitive advantages, which can thus be realized by the final element according to the invention.
Hardening of the end element increases the wear resistance of the same and extends its life.
the closing element is glued over its first coupling region fixed to the camshaft, pressed, welded or bolted via a formed on the first coupling portion peripheral thread which cooperates with a mating thread on the camshaft.
the second coupling region of the closing element is designed as a bearing shell or groove running transversely to the camshaft axis and open towards the axial end of the camshaft, thereby enlarging a bearing surface of a complementary driver and engaging in the bearing shell or the groove of the auxiliary assembly arranged on the output side.
the second coupling region designed as a bearing shell or as a groove preferably engages in recesses in the camshaft jacket which are open toward the axial end of the camshaft.
the bearing shell or groove which is open towards the axial end of the camshaft is completely free in its design, so that in particular a longitudinal extent of the bearing shell extending transversely to the camshaft axis can be adapted to the respective requirements.
Fig. 1a an axial end portion of a camshaft 1 is shown, on which a fixedly connected to the camshaft 1 terminating element 2 is arranged.
the end element 2 closes the camshaft 1 in the axial direction and is at the same time designed as a drive element for a driven side arranged and not shown accessory.
the closing element 2 is designed as a shaped sheet metal part, wherein it can be stamped, drawn and / or hardened, for example.
the end element 2 has a first coupling region 3, via which it is fixedly connected to the camshaft 1, and a second coupling region 4, via which it can be drive-connected to the output-side auxiliary device.
the closing element 2 penetrates according to the Sectional views in Fig. 1a and b in a circular cylindrical cavity 5 of the camshaft 1 and is at least partially with parts of the first coupling region 3 on an inner circumferential surface 6 of the camshaft 1 at.
an attachment of the end element 2 can be realized via its first coupling region 3 with the camshaft 1 via an adhesive bond, a compression or a weld, wherein it is also conceivable that a peripheral thread, for example an external thread, is provided on the first coupling region 3 a mating thread, such as an internal thread, on the inner circumferential surface 6 of the camshaft 1 cooperates and thereby realizes the attachment of the closing element 2 on the camshaft 1 via a screw.
a screw connection can facilitate replacement or replacement of the end element 2 according to the invention.
For a high operating or service life designed as a sheet metal part closure element 2 is preferably cured.
the second coupling region 4 of the end element 2 is designed as a bearing shell 8 extending transversely to the camshaft axis 7 and open towards the axial end of the camshaft 1, which, for example, has a groove-like shape and thereby enlarges a bearing surface of a complementary design and in the bearing shell 8 engaging, not shown driver of the output side arranged auxiliary unit.
the bearing shell 8 and the groove extends gem. 1a in the image plane, whereas they perpendicular to FIG. 1b runs to the image plane.
the second coupling region 4 may have different, extending transversely to the camshaft axis 7, longitudinal extent, it being conceivable that, as shown in Fig.
the second coupling portion 4 of two coupling portions 9 and 9 ' is formed, which preferably radially outside the outer diameter of the Camshaft 1 lie. It is of course also conceivable that the two coupling portions 9 and 9 'adjoin one another and thereby together form the second coupling region 4, starting from the camshaft axis 7 radially outwards to at most the inner diameter of the camshaft 1. Also to be enclosed by the invention is a second coupling region 4, which extends starting from the camshaft axis 7 radially outward to beyond the outer diameter of the camshaft 1 addition. Such a second coupling region 4 would be realized, for example, by the fact that the two coupling sections 9 and 9 'according to FIG. 2d each extend radially inward as far as the camshaft axis 7 and touch each other there.
auxiliary unit engages trained as a bearing shell 8 or as a groove second coupling region 4 in the axial end of the camshaft 1 open recesses 10 in the camshaft casing 11 a.
the two coupling sections 9 and 9 ' are formed complementary to the recesses 10 in the camshaft casing 11, so that a positive connection is formed. This will become independent of the selected mounting of the closing element 2 on the camshaft 1, the closing element 2 rotatably connected to the camshaft 1.
the closing element 2 seals the camshaft 1 axially tightly, that is, the first coupling region 3 is in a form-fitting and tight manner against the inner circumferential surface 6 of the camshaft 1.
FIGS. 2a-2d in each case a closing element 2 is shown which has a similar construction to the closing element 2 according to FIGS. 1a-1d, the two coupling sections 9 and 9 'being extended radially inwards. It is conceivable that the two coupling portions 9 and 9 'according to the Fig. 2d are extended so far radially inward that they, as indicated by the broken line drawn, touch.
the two coupling sections 9 and 9 ' are connected to each other via connecting webs 18.
Such an extended second coupling region 4 increases the bearing surface for a driver engaging in the bearing shell 8.
FIGS. 3a-3d show a variant of a terminating element 2, wherein in comparison to FIGS. 1 and 2, the first coupling region 3 is extended in the direction of the second coupling region 4 so as to create a connection between the two coupling sections 9 and 9 ' , As a result, in contrast to FIGS. 1 and 2, a particularly stable second coupling region 4 is created. Furthermore engages the first coupling portion 3 of FIG. 3b significantly further into the cylindrical inner cavity 5 of the camshaft 1, so that here a particularly good connection between the end member 2 and the camshaft 1 is achieved.
the end element 2 is arranged completely in the inner hollow space 5 of the camshaft 1.
the second coupling region 4 extends radially outwards and ends before the inner diameter of the camshaft 1 is reached.
the recess 10 in the camshaft jacket 11 is not provided in this case.
a closing element 2 which comprises the camshaft 1 with its first coupling region 3 axially end, so that an inner circumferential surface 12 (see Fig. 5a) of the first coupling portion 3 of the closing element 2 form fit to an outer circumferential surface thirteenth the camshaft 1 is applied.
no recesses 10 are provided in the camshaft casing 11, so that here too the second coupling region 4 lies radially within the inner diameter of the camshaft 1.
FIGS. 6a to 6d each show a variant of the terminating element 2 according to the invention, in which the first coupling region 3 is also formed, as in FIGS. 5a to 5d, such that on the one hand it bears against the inner circumferential surface 6 of the camshaft 1 and at the same time the camshaft 1 includes axially end, so that the inner circumferential surface 12 of the closing element 2 rests positively on the outer circumferential surface 13 of the camshaft 1.
the second coupling region 4 is divided into two coupling sections 9 and 9 ', which extend radially outwardly starting from the outer diameter of the camshaft 1. In this case, as in FIGS. 4 and 5, no recesses 10 are provided in the camshaft casing 11. According to FIGS.
the closing element 2 additionally has an annular collar 17, which protrudes radially outwards beyond the outer diameter of the camshaft 1.
the end element 2 in its embodiment according to FIGS. 6 a to 6 d adjoins the axial end of the camshaft 1, so that the end element 2 is not flush with the camshaft 1.
the second coupling region 4 likewise does not engage in recesses 10 in the camshaft casing 11 and, moreover, is subsequently arranged in the axial direction at the end of the camshaft 1.
the second coupling portion 4 also has two coupling portions 9 and 9 ', which widen radially inwardly, starting from the inner diameter of the camshaft 1, so that the follower of a downstream accessory only a torque transmission over the two coupling sections 9 and 9 ', which lie radially outside the inner diameter of the camshaft 1 experiences.
a closure element 2 which has a continuous second coupling region 4 which extends radially from the camshaft axis 7 beyond the outer diameter of the camshaft 1.
the first coupling region 3 is web-like, so that the end element 2 according to FIG. 8 does not seal the camshaft 1 axially tight.
a rotationally fixed connection between the end element 2 and the camshaft 1 is achieved by engagement of the second coupling region 4 on both sides into corresponding recesses 10 in the camshaft casing 11.
the second coupling region 4 has a bulbous thickening in the region which lies radially within the inner diameter of the camshaft 1, whereby a displacement safeguard in the transverse direction to the camshaft axis 7 is provided.
no additional first coupling region 3 is provided on the end element 2 in the end element 2 according to FIGS. 9a-9d, so that a connection between the end element 2 and the camshaft 1 only by engaging the second coupling region 4 in corresponding recesses 10 on the camshaft casing 11 and the structural thickening 14 is achieved.
the closing element 2 according to FIGS. 9a-9d does not close the camshaft 1 axially tightly.
a closure element 2 according to FIGS. 10a-10d has a second coupling region 4 which extends radially beyond the outer diameter of the camshaft 1 and which is channel-like, and which engages in corresponding recesses 10 on the camshaft jacket 11.
a closure element 2 according to FIGS. 10a-10d has a second coupling region 4 which extends radially beyond the outer diameter of the camshaft 1 and which is channel-like, and which engages in corresponding recesses 10 on the camshaft jacket 11.
the two webs 16 and 16 'thus form the first coupling region 3.
the closing element 2 according to FIG. 10 is flush with an axial end of the camshaft 1, so that only the end element 2 according to FIG. 7 projects beyond an axial end of the camshaft 1.
the closing element 2 can additionally be designed as an assembly aid and / or serve as such, and thereby facilitate, for example, an angle of rotation accurate assembly of the camshaft 1 and / or the output side auxiliary unit.

Landscapes

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

EP06126362A 2006-01-05 2006-12-18 Arbre à cames Not-in-force EP1806482B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE102006000846A DE102006000846A1 (de)	2006-01-05	2006-01-05	Nockenwelle

Publications (3)

Publication Number	Publication Date
EP1806482A2 true EP1806482A2 (fr)	2007-07-11
EP1806482A3 EP1806482A3 (fr)	2009-04-08
EP1806482B1 EP1806482B1 (fr)	2010-06-16

Family

ID=38033765

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP06126362A Not-in-force EP1806482B1 (fr)	2006-01-05	2006-12-18	Arbre à cames

Country Status (3)

Country	Link
US (1)	US7621245B2 (fr)
EP (1)	EP1806482B1 (fr)
DE (2)	DE102006000846A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102006040042A1 (de)	2006-08-26	2008-03-20	GM Global Technology Operations, Inc., Detroit	Verfahren und Vorrichtung zum Befestigen eines Airbags an einem Kraftfahrzeug
DE102009006210A1 (de) *	2009-01-27	2010-07-29	Mahle International Gmbh	Bauteil mit einer Einschrauböffnung
DE102013223685A1 (de) *	2013-11-20	2015-05-21	Mahle International Gmbh	Verschlussstopfen für eine Nockenwelle
DE102021208281A1 (de)	2021-07-30	2023-02-02	Mahle International Gmbh	Kombiniertes Stopfen-Geberrad für eine Nockenwelle

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS5898608A (ja) *	1981-12-07	1983-06-11	Suzuki Motor Co Ltd	内燃機関用カムシヤフト
JPS61266132A (ja) *	1985-05-21	1986-11-25	Musashi Seimitsu Ind Co Ltd	組立カムシヤフトの製造方法
JPH08254172A (ja) *	1995-03-17	1996-10-01	Mitsubishi Electric Corp	回転角度検出装置
DE19640872C2 (de) *	1996-10-04	1999-07-01	Ind Fahrzeugtechnik Gmbh & Co	Nocken für gebaute Nockenwelle
DE19703821A1 (de) *	1997-02-01	1998-08-06	Peter Prof Dr Ing Tenberge	Gefügte Welle
DE29918298U1 (de) *	1999-07-09	2000-01-13	Sächsische Elektronenstrahl GmbH, 09117 Chemnitz	Nockenwelle
DE10049454A1 (de) *	2000-10-06	2002-04-11	Daimler Chrysler Ag	Ölversorgung einer Hohlwelle eines Kraftfahrzeugs
DE60317875T2 (de) *	2003-04-02	2008-11-27	Renault S.A.S.	Nockenwellenauslegung für Motoren

2006
- 2006-01-05 DE DE102006000846A patent/DE102006000846A1/de not_active Withdrawn
- 2006-12-18 EP EP06126362A patent/EP1806482B1/fr not_active Not-in-force
- 2006-12-18 DE DE502006007220T patent/DE502006007220D1/de active Active
2007
- 2007-01-04 US US11/649,918 patent/US7621245B2/en not_active Expired - Fee Related

Also Published As

Publication number	Publication date
DE102006000846A1 (de)	2007-07-19
EP1806482B1 (fr)	2010-06-16
EP1806482A3 (fr)	2009-04-08
DE502006007220D1 (de)	2010-07-29
US7621245B2 (en)	2009-11-24
US20070151530A1 (en)	2007-07-05

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2009-09-02	17P	Request for examination filed	Effective date: 20090723
2009-12-16	AKX	Designation fees paid	Designated state(s): DE FR GB
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