EP3450706B1 - Device for rotatably supporting a camshaft - Google Patents

Device for rotatably supporting a camshaft Download PDF

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Publication number
EP3450706B1
EP3450706B1 EP18184901.9A EP18184901A EP3450706B1 EP 3450706 B1 EP3450706 B1 EP 3450706B1 EP 18184901 A EP18184901 A EP 18184901A EP 3450706 B1 EP3450706 B1 EP 3450706B1
Authority
EP
European Patent Office
Prior art keywords
bearing body
cylinder head
camshaft
bearing
fixing
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.)
Active
Application number
EP18184901.9A
Other languages
German (de)
French (fr)
Other versions
EP3450706A1 (en
Inventor
Peter Bogdanski
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.)
MAN Truck and Bus SE
Original Assignee
MAN Truck and Bus SE
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 MAN Truck and Bus SE filed Critical MAN Truck and Bus SE
Priority to EP21157914.9A priority Critical patent/EP3842622B1/en
Publication of EP3450706A1 publication Critical patent/EP3450706A1/en
Application granted granted Critical
Publication of EP3450706B1 publication Critical patent/EP3450706B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00Casings, e.g. crankcases or frames
    • F02F7/006Camshaft or pushrod housings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • F01L1/053Camshafts overhead type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12Transmitting gear between valve drive and valve
    • F01L1/18Rocking arms or levers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00Cylinders; Cylinder headsĀ 
    • F02F1/24Cylinder heads
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12Transmitting gear between valve drive and valve
    • F01L1/18Rocking arms or levers
    • F01L1/181Centre pivot rocking arms
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • F01L2001/0476Camshaft bearings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00Casings, e.g. crankcases or frames
    • F02F7/006Camshaft or pushrod housings
    • F02F2007/0063Head bolts; Arrangements of cylinder head bolts

Definitions

  • the invention relates to a device for the rotatable mounting of a camshaft.
  • Camshafts are required in internal combustion engines to control the intake and exhaust valves and are attached to a cylinder head in the cylinder crankcase of the internal combustion engine, for example, via so-called bearing blocks.
  • the bearing blocks can also be attached to a mounting frame.
  • the bearing blocks support the camshaft so that it can rotate. In order to be able to achieve the smoothest possible mounting of the camshaft, it is necessary that the camshaft and the bearing blocks are aligned with respect to the cylinder head.
  • the DE 10 2011 081 483 A1 discloses a method for the simplified and precisely positional fixing of a camshaft module with a camshaft and bearing blocks on a cylinder head.
  • the bearing blocks are attached to the camshaft in the axial direction and aligned with respect to an angle.
  • the camshaft is aligned with the cylinder head using two alignment elements.
  • the individual bearing blocks are screwed tight to the cylinder head while turning the camshaft at the same time or in the meantime.
  • a cylinder head for an internal combustion engine is known. At least one bearing block with a bearing half for a camshaft and a bearing half for a rocker arm shaft for at least one rocker arm is provided on the cylinder head.
  • a first separate lubricant supply channel is provided in the cylinder head and a second separate lubricant supply channel is provided in the bearing block.
  • a first end of the second lubricant supply channel is in communication with the first lubricant supply channel.
  • a second end of the second lubricant supply channel ends openly in a bearing surface for the rocker arm shaft.
  • the WO 2008/061382 A1 discloses a camshaft assembly.
  • the camshaft assembly has at least two bearing blocks, each with a bearing receptacle in which a shaft section of a camshaft is rotatably arranged.
  • a flat contact surface is formed on each bearing block for supporting and fastening the bearing block to a bearing surface of a cylinder head.
  • Each bracket is attached to the cylinder head with two screws.
  • the EP 0 285 598 B1 discloses an injection internal combustion engine with cylinders arranged in rows, with two overhead camshafts and four valves and a central pump nozzle per cylinder.
  • Detachably attached rocker arms for driving the pump nozzles are provided above the associated camshaft on the cylinder head.
  • the cam for the rocker arms to actuate the pump nozzles is driven alternately for one cylinder from the one camshaft and for the adjacent cylinder from the second camshaft, each rocker arm being fastened individually.
  • the detachable individual attachment of the rocker arms is carried out on the bearing blocks attached to the cylinder head by screws, the screws also serving to anchor bearing parts for the camshafts.
  • the DE 10 2007 025 129 A1 discloses a cylinder head cover for covering a cylinder crankcase of an internal combustion engine. At least one upper bearing part for a camshaft has at least one through opening which is aligned on the one hand with a screw-in / through opening in a lower bearing part and / or a screw-in opening in the cylinder crankcase and on the other hand with a through opening in the cylinder head cover.
  • the cylinder head cover and the upper bearing part can be fastened to the cylinder crankcase using a common fastening screw.
  • the EP 1 936 130 A2 discloses a bearing device for two camshafts.
  • a bearing body for both camshafts can be attached to a cylinder head by means of a bolt.
  • the WO 2010/086517 A1 discloses a method for positioning two mechanical foundry or forged parts with respect to one another and an assembly manufactured according to such a method.
  • the CN 102 061 952 A discloses a camshaft bearing seat comprising a bearing seat body which is disposed on the upper part of a cylinder cover of a vehicle engine and is provided with a mounting hole for mounting a camshaft; includes.
  • An eccentric shaft hole for fixing an eccentric shaft is arranged on one side of the fixing hole. The axes of the mounting hole and the eccentric shaft hole are parallel.
  • the bearing seat body is provided with a connecting hole for attaching the bearing seat body.
  • the WO 2012/055150 A1 relates to a cylinder head lubrication structure comprising a cylinder head body, a front camshaft bearing cap, a middle camshaft bearing cap and a rear camshaft bearing cap and a camshaft bushing provided therein.
  • Each bearing cap has a rocker arm shaft mounted on the bearing caps.
  • the invention is based on the object of providing an alternative or improved device for the rotatable mounting of a camshaft.
  • a simple and space-optimized structure is to be implemented.
  • the device is provided for the rotatable mounting of a camshaft of an internal combustion engine.
  • the device has a first bearing body with a receptacle for the rotatable mounting of the camshaft.
  • the device has a cylinder head or a fastening frame for fastening the first bearing body.
  • the device has a first fastening means (for example a first fastening screw) which fastens the first bearing body to the cylinder head or fastening frame.
  • the first fastening means is the only fastening means that fasten (fixes, fixes) the first bearing body to the cylinder head or fastening frame.
  • the device offers the advantage that a more space-saving design of the first bearing body is made possible.
  • the first bearing body only has to provide enough material on one side next to the camshaft receptacle to accommodate the fastening means.
  • the first bearing body can be designed asymmetrically with respect to a vertical plane through a central longitudinal axis of the receptacle.
  • the manufacturing costs can be reduced, since fewer fasteners are required, fewer receptacles for fasteners (for example screw holes) have to be produced and the assembly time is reduced.
  • the first bearing body can be attached either to a cylinder head or to a mounting frame.
  • the cylinder head or fastening frame can also be designed more freely.
  • the first bearing body can have a first side area in which the first fastening means is received, and a second side area opposite the first side area with respect to the receptacle for the camshaft.
  • the cylinder head can have a flow channel which extends in a region of the cylinder head which is arranged next to (for example adjacent to) the second side region (for example below the second side region with respect to a vertical axis) of the first bearing body.
  • the flow channel can preferably have a shape (design) free of casting protrusions in this area. This is made possible by the fact that no casting slug (casting projection) is required to accommodate a blind hole for a further fastening means. The provision of only a single fastening means can thus contribute to a flow-optimized design of a flow channel in the cylinder head.
  • the receptacle for the camshaft can preferably be a cylindrical through hole or a recess in the form of a half cylinder.
  • the fastening frame when using a fastening frame for fastening the first bearing body, can be fastened (fixed, fixed) to a cylinder head.
  • the camshaft can be arranged as an overhead camshaft.
  • the camshaft is pressed down during operation. This means that the camshaft does not tend to lift, which means that the use of a single fastening means can be sufficient.
  • the first fastening means is a first fastening screw.
  • the first fastening screw can be the only fastening screw that attaches the first bearing body to the cylinder head or fastening frame.
  • the first bearing body can preferably have a through hole for receiving the first fastening means, in particular the first fastening screw, which extends through the through hole.
  • the first fastening means fasten the first bearing body to the cylinder head or fastening frame in a non-positive and positive manner.
  • the first fastening means can preferably be a releasable fastening means.
  • the first fastening means can be the only (for example detachable) fastening means of the device.
  • the first bearing body forms a one-piece bearing block for mounting the camshaft.
  • the device has a second bearing body with a receptacle (for example as a recess in the form of a half cylinder) for bearing the camshaft.
  • the first bearing body and the second bearing body together form a two-part bearing block.
  • the receptacle (for example as a recess in the form of a half cylinder) of the first bearing body and the receptacle (for example as a recess in the form of a half cylinder) of the second bearing body form a common receptacle for the camshaft.
  • the present disclosure can therefore not only be used for one-piece bearing blocks, but also for two-part bearing blocks. Consequently, the present disclosure can be used not only with assembled camshafts, but also with forged camshafts, where threading of the bearing blocks is not possible.
  • the second bearing body can preferably have a through hole for receiving the first fastening means, in particular the first fastening screw, which extends through the Extends through hole.
  • the through hole of the first bearing body and the through hole of the second bearing body can be aligned with one another.
  • first bearing body and the second bearing body are fastened to one another, preferably in a non-positive and positive manner, via a second fastening means, in particular a second fastening screw.
  • first fastening means and the second fastening means can be provided on opposite sides of the first bearing body with respect to the receptacle for the camshaft.
  • the second fastening means can preferably be a releasable fastening means.
  • first fastening means and the second fastening means are the only fastening means of the device.
  • first fastening means additionally fasten the second bearing body to the cylinder head or fastening frame. It is also possible for the first fastening means to be the only fastening means that fasten the second bearing body to the first bearing body.
  • the device also has at least one positioning element which is arranged between the first bearing body and the second bearing body for positioning the first bearing body relative to the second bearing body. It can thus be ensured in particular that the camshaft receptacles of the bearing bodies are aligned with one another.
  • the positioning elements can position the first bearing body relative to the second bearing body in a plane perpendicular to the longitudinal axis of the first fastening means.
  • the device can have no positioning element for positioning the first or second bearing body relative to the cylinder head or mounting frame. The costs for the positioning elements can thus be saved.
  • the at least one positioning element arranged between the first bearing body and the second bearing body comprises a positioning pin, a fitting sleeve surrounding the first fastening means and / or a fitting sleeve surrounding the second fastening means.
  • the use of fitting sleeves can be a allow small dimensions of the bearing body, since no additional material areas are required for the provision of holes for positioning pins.
  • the device also has at least one positioning element which is arranged between the first or second bearing body and the cylinder head or the fastening frame for positioning the first or second bearing body relative to the cylinder head or fastening frame. Alignment of the corresponding bearing body relative to the cylinder head or mounting frame can thus be improved.
  • the positioning elements can position the first or second bearing body relative to the cylinder head or fastening frame in a plane perpendicular to the longitudinal axis of the first fastening means.
  • the at least one positioning element arranged between the first or second bearing body and the cylinder head or the fastening frame comprises a positioning pin and / or a fitting sleeve which surrounds the first fastening means.
  • the use of a fitting sleeve can enable the bearing body to be dimensioned small, since no additional material areas are required for the provision of bores for positioning pins.
  • camshaft is mounted in several devices, spaced apart in the longitudinal direction of the camshaft, for the rotatable mounting of the camshaft.
  • the device of the invention has a rocker arm shaft for rotatably supporting a rocker arm.
  • the first fastening means additionally fasten the rocker arm axis to the cylinder head or fastening frame, and in particular also to the first and / or second bearing body.
  • a further additional fastening means for fastening the rocker arm shaft can thus be saved. As a result, the assembly time can also be reduced.
  • the first bearing body has a receptacle for the rocker arm axis, which is preferably arranged on a side of the first bearing body opposite the cylinder head or fastening frame.
  • a longitudinal lubricating fluid channel of the rocker arm axis is in fluid connection with the receptacle for the camshaft of the first bearing body, preferably via a branch channel of the first bearing body and a branch channel of the rocker arm axis. In this way, a lubricating fluid can flow via the rocker arm axis to a plain bearing of the camshaft.
  • the fastening frame or the cylinder head has a hole, in particular a blind hole or a through hole, with a thread for non-positive and positive fastening of the first bearing body to the fastening frame or cylinder head by means of the first fastening means.
  • the first fastening means can thus be screwed directly into the blind hole, in particular in the form of a fastening screw for fastening the first bearing body (and optionally the second bearing body).
  • the first bearing body is designed asymmetrically with respect to a vertical plane through a central longitudinal axis of the receptacle for the camshaft. This is made possible in particular by the provision of a single fastening means (the first fastening means) for fastening to the cylinder head or fastening frame.
  • the first fastening means can generate a tilting moment for supporting the first bearing body on a support surface of the cylinder head or fastening frame.
  • the invention also relates to a motor vehicle, in particular a utility vehicle, with a device as disclosed herein.
  • the utility vehicle can be, for example, a truck or a bus.
  • the Figure 1 shows a device 10 for rotatably mounting a camshaft 12.
  • the device 10 has a bearing body 14, a cylinder head 16, a fastening screw 18 and a rocker arm shaft 20.
  • the device 10 can be used for supporting the camshaft 12 in any internal combustion engine.
  • the internal combustion engine can for example be included in a motor vehicle, in particular a utility vehicle.
  • the utility vehicle can be, for example, a truck or a bus.
  • the bearing body 14 is designed as a one-piece bearing block.
  • the bearing body 14 has a receptacle 22 for the camshaft 12.
  • the camshaft 12 can be rotatably mounted in the receptacle 22 via a slide bearing.
  • the receptacle 22 is a cylindrical through hole of the bearing body 14.
  • the camshaft 12 is a built-up camshaft. A cylindrical section of the camshaft 12 is pushed into the receptacle 22 in the dismantled state of the camshaft 12. The camshaft 12 is then assembled.
  • a plurality of bearing bodies 14 are provided along a longitudinal axis of the camshaft 12.
  • the camshaft 12 is arranged as an overhead camshaft (OHC).
  • the bearing body 14 is fastened (fixed) to the cylinder head 16 via the fastening screw 18.
  • the fastening screw 18 extends through a through hole 24 of the bearing body 14.
  • the fastening screw 18 is screwed into a thread of a blind hole 26 of the cylinder head 16.
  • the blind hole 26 extends into a casting slug (casting projection) 27, which is shaped in particular to provide the blind hole 26 or a through hole.
  • fastening screw 18 is the only fastening screw that attaches the bearing body 14 to the cylinder head 16.
  • Conventional bearing blocks mostly use two or four fastening screws to fasten the bearing body to the cylinder head.
  • the fastening screw 18 is sufficient as the only fastening screw for the bearing body 14.
  • the camshaft 12 is pushed downward by the cam follower of the rocker arm during operation.
  • the weight of the camshaft 12 also acts downwards.
  • the camshaft 12 thus shows no tendency to lift off the cylinder head 16 together with the bearing body 14.
  • the screw force of the fastening screw 18 and a one-sided material area next to the fastening screw 18 (left in Figure 1 ) a tilting moment is generated on a bearing surface 29 to the cylinder head 16, which holds the first bearing body 14 securely on the cylinder head 16.
  • the bearing body 14 only has to have a material area on one side for receiving the fastening screw 18.
  • the bearing body 14 can end directly with a wall area delimiting the receptacle 22.
  • the bearing body 14 can thus be better adapted to the available installation space.
  • the bearing body 14 can be configured asymmetrically with respect to a vertical plane through a central longitudinal axis of the receptacle 22 of the bearing body 14.
  • the cylinder head 16 does not have to have any casting slugs (no casting projection) for providing a blind hole for screwing in a fastening screw, in particular in area A.
  • the area A can, for example, be shaped in a flow-optimized manner for a fluid channel 28 in the cylinder head 16.
  • the number of parts of the device can also be reduced due to the reduction in the number of fastening screws.
  • the production time and the assembly time are reduced, since fewer screw holes have to be made and fewer fastening screws have to be installed.
  • the present disclosure is not limited to the fastening screw 18 attaching the bearing body 14 to the cylinder head 16 attached.
  • the fastening screw 18 could fasten the bearing body 14 to a fastening frame 30.
  • the fastening frame 30 could then in turn be fastened to a cylinder head.
  • the in Figure 1 The component shown below the bearing body 14 could alternatively be an area of a fastening frame 30 instead of an area of a cylinder head 16.
  • fastening screw 18 As an alternative to the fastening screw 18, another fastening means could also be used for the force-fitting and form-fitting fastening of the bearing body 14 to the cylinder head 16.
  • the rocker arm shaft 20 is used for the rotatable mounting of a rocker arm (not shown).
  • the rocker arm is operatively connected via a cam follower between the camshaft 12 and one or more gas exchange valves (not shown) for actuating the gas exchange valves.
  • the fastening screw 18 also attaches the rocker arm shaft 20 to the cylinder head 16 (fastening frame 30).
  • the fastening screw 18 extends through a through hole 32 of the rocker arm axis 20.
  • the holes 32, 24 and 26 are aligned with one another along a longitudinal axis of the fastening screw 18.
  • a screw head 18A rests on a contact surface 20A of the rocker arm axis 20.
  • the rocker arm axis 20 is mounted in a receptacle 21 of the bearing body 14. The additional fastening of the rocker arm shaft 20 via the fastening screw 18 is optional.
  • a lubricating fluid can be supplied to the rocker arm shaft 20 via a longitudinal channel 34.
  • a branch channel 36 of the rocker arm shaft 20 opens into a branch channel 38 of the bearing body 14.
  • the branch channel 38 in turn opens into the receptacle 22.
  • additional positioning elements 40, 42 can optionally be used.
  • the positioning elements 40, 42 position the bearing body 14 relative to the cylinder head 16 in a plane perpendicular to the longitudinal axis of the fastening screw 18.
  • the positioning element 40 is designed as a fitting sleeve.
  • the positioning element 40 is provided in a form-fitting manner in a recess 44 of the bearing body 14 and a recess 46 of the cylinder head 16 (fastening frame 30).
  • the positioning element 40 is around the fastening screw 18 arranged around, preferably without touching the fastening screw 18.
  • the positioning element 42 is designed as a positioning pin.
  • the positioning element 42 is positively provided in a recess 48 of the bearing body 14 and a recess 50 of the cylinder head 16 (fastening frame 30).
  • the positioning elements can, for example, also be designed as fitting sleeves.
  • the Figure 2 shows a further embodiment of a device 110 for rotatably mounting the camshaft 12.
  • the device 110 is characterized in particular by the fact that it is also suitable for the rotatable mounting of forged camshafts, since threading the bearing blocks is not possible here.
  • the device 110 has a first bearing body 14A and a second bearing body 14B.
  • the first bearing body 14A and the second bearing body 14B form a two-part bearing block.
  • the first bearing body 14A has a first receptacle 22A and the second bearing body 14B has a second receptacle 22B.
  • the receptacles 22A, 22B form a common receptacle in cylinder shape for the camshaft 12.
  • the fastening screw 18 is the only fastening screw that fastens (fixes) the bearing bodies 14A, 14B on the cylinder head 16 (fastening frame 30).
  • the fastening screw 18 extends through a through hole 24A of the first bearing body 14A and a through hole 24B of the second bearing body 14B.
  • a second fastening screw 52 can be provided which fastens the first bearing body 14A to the second bearing body 14B.
  • the mounting screws 18 and 52 may be positioned on opposite sides of the camshaft 12.
  • the fastening screw 52 extends through a through hole 58 in the first bearing body 14A.
  • the fastening screw 52 is screwed into a thread of a blind hole 60 of the second bearing body 14B.
  • Positioning elements 54 and 56 are provided for positioning the bearing bodies 14A and 14B with respect to one another.
  • the positioning elements 54, 56 position the first bearing body 14A relative to the second bearing body 14B in a plane perpendicular to the longitudinal axis of the fastening screw 18.
  • the positioning elements 54, 56 are designed as dowel sleeves, but can also be designed, for example, as dowel pins.
  • the positioning elements 54, 56 connect the first bearing body 14A to the second bearing body 14B in a form-fitting manner.
  • the positioning element 54 is arranged around the fastening screw 18, preferably without touching the fastening screw 18.
  • the positioning element 56 is arranged around the fastening screw 52, preferably without touching the fastening screw 52.
  • the device 110 of Figure 2 is an embodiment in which no positioning elements for positioning the first and second bearing bodies 14A, 14B relative to the cylinder head 16 (mounting frame 30) are provided. In further developments of this exemplary embodiment, positioning elements could be provided between the second bearing body 14B and the cylinder head 16 (fastening frame 30).

Description

Die Erfindung betrifft eine Vorrichtung zum drehbaren Lagern einer Nockenwelle.The invention relates to a device for the rotatable mounting of a camshaft.

Nockenwellen werden bei Verbrennungsmotoren zum Steuern der Ein- und Auslassventile benƶtigt und Ć¼ber sogenannte Lagerbƶcke bspw. an einem Zylinderkopf im ZylinderkurbelgehƤuse des Verbrennungsmotors befestigt. Alternativ kƶnnen die Lagerbƶcke auch an einem Befestigungsrahmen befestigt sein. Die Lagerbƶcke lagern die Nockenwelle drehbar. Um dabei eine mƶglichst leichtgƤngige Lagerung der Nockenwelle erreichen zu kƶnnen, ist es erforderlich, dass die Nockenwelle und die Lagerbƶcke gegenĆ¼ber dem Zylinderkopf ausgerichtet sind.Camshafts are required in internal combustion engines to control the intake and exhaust valves and are attached to a cylinder head in the cylinder crankcase of the internal combustion engine, for example, via so-called bearing blocks. Alternatively, the bearing blocks can also be attached to a mounting frame. The bearing blocks support the camshaft so that it can rotate. In order to be able to achieve the smoothest possible mounting of the camshaft, it is necessary that the camshaft and the bearing blocks are aligned with respect to the cylinder head.

Die DE 10 2011 081 483 A1 offenbart ein Verfahren zur vereinfachten und lagegenauen Fixierung eines Nockenwellenmoduls mit einer Nockenwelle und Lagerbƶcken an einem Zylinderkopf. Die Lagerbƶcke werden in Axialrichtung und bezĆ¼glich eines Winkels ausgerichtet auf der Nockenwelle befestigt. Die Nockenwelle wird Ć¼ber zwei Ausrichtelemente gegenĆ¼ber dem Zylinderkopf ausgerichtet. Die einzelnen Lagerbƶcke werden mit dem Zylinderkopf bei gleichzeitigem oder zwischenzeitlichem Drehen der Nockenwelle festgeschraubt.The DE 10 2011 081 483 A1 discloses a method for the simplified and precisely positional fixing of a camshaft module with a camshaft and bearing blocks on a cylinder head. The bearing blocks are attached to the camshaft in the axial direction and aligned with respect to an angle. The camshaft is aligned with the cylinder head using two alignment elements. The individual bearing blocks are screwed tight to the cylinder head while turning the camshaft at the same time or in the meantime.

Aus der DE 197 52 381 A1 ist ein Zylinderkopf fĆ¼r eine Brennkraftmaschine bekannt. Auf dem Zylinderkopf ist wenigstens ein Lagerbock mit einer LagerhƤlfte fĆ¼r eine Nockenwelle und einer LagerhƤlfte fĆ¼r eine Kipphebelachse fĆ¼r wenigstens einen Kipphebel vorgesehen. Im Zylinderkopf ist ein erster separater Schmiermittel-Versorgungskanal und im Lagerbock ein zweiter separater Schmiermittel-Versorgungskanal vorgesehen. Ein erstes Ende des zweiten Schmiermittel-Versorgungskanals steht mit dem ersten Schmiermittel-Versorgungskanal in Verbindung. Ein zweites Ende des zweiten Schmiermittelversorgungskanals endet offen in einer LagerflƤche fĆ¼r die Kipphebelachse.From the DE 197 52 381 A1 a cylinder head for an internal combustion engine is known. At least one bearing block with a bearing half for a camshaft and a bearing half for a rocker arm shaft for at least one rocker arm is provided on the cylinder head. A first separate lubricant supply channel is provided in the cylinder head and a second separate lubricant supply channel is provided in the bearing block. A first end of the second lubricant supply channel is in communication with the first lubricant supply channel. A second end of the second lubricant supply channel ends openly in a bearing surface for the rocker arm shaft.

Die WO 2008/061382 A1 offenbart eine Nockenwellenbaugruppe. Die Nockenwellenbaugruppe weist mindestens zwei Lagerbƶcke mit je einer Lageraufnahme, in welche ein Wellenabschnitt einer Nockenwelle drehbar angeordnet ist, auf. An jedem Lagerbock ist eine plane AnlageflƤche zu Auflage und Befestigung des Lagerbocks an eine AuflageflƤche eines Zylinderkopfes ausgebildet. Jeder Lagerbock ist mit jeweils zwei Schrauben am Zylinderkopf befestigt.The WO 2008/061382 A1 discloses a camshaft assembly. The camshaft assembly has at least two bearing blocks, each with a bearing receptacle in which a shaft section of a camshaft is rotatably arranged. A flat contact surface is formed on each bearing block for supporting and fastening the bearing block to a bearing surface of a cylinder head. Each bracket is attached to the cylinder head with two screws.

Die EP 0 285 598 B1 offenbart eine Einspritzbrennkraftmaschine mit in Reihen angeordneten Zylindern, mit zwei obenliegenden Nockenwellen sowie vier Ventilen und einer zentralen PumpendĆ¼se pro Zylinder. Oberhalb der zugeordneten Nockenwelle am Zylinderkopf sind lƶsbar befestigte Kipphebel zum Antrieb der PumpendĆ¼sen vorgesehen. Dabei erfolgt der Antrieb des Nockens fĆ¼r die Kipphebel zur BetƤtigung der PumpendĆ¼sen abwechselnd fĆ¼r einen Zylinder von der einen Nockenwelle und fĆ¼r den benachbarten Zylinder von der zweiten Nockenwelle aus, wobei jeder Kipphebel einzeln befestigt ist. Die lƶsbare Einzelbefestigung der Kipphebel erfolgt auf den von Schrauben am Zylinderkopf befestigten Lagerbƶcken, wobei die Schrauben gleichzeitig zur Verankerung von Lagerteilen fĆ¼r die Nockenwellen dienen.The EP 0 285 598 B1 discloses an injection internal combustion engine with cylinders arranged in rows, with two overhead camshafts and four valves and a central pump nozzle per cylinder. Detachably attached rocker arms for driving the pump nozzles are provided above the associated camshaft on the cylinder head. The cam for the rocker arms to actuate the pump nozzles is driven alternately for one cylinder from the one camshaft and for the adjacent cylinder from the second camshaft, each rocker arm being fastened individually. The detachable individual attachment of the rocker arms is carried out on the bearing blocks attached to the cylinder head by screws, the screws also serving to anchor bearing parts for the camshafts.

Die DE 10 2007 025 129 A1 offenbart eine Zylinderkopfhaube zur Abdeckung eines ZylinderkurbelgehƤuses einer Brennkraftmaschine. Zumindest ein Lageroberteil fĆ¼r eine Nockenwelle weist zumindest eine Durchgangsƶffnung auf, welche einerseits mit einer Einschraub-/Durchgangsƶffnung in einem Lagerunterteil und/oder einer Einschraubƶffnung im ZylinderkurbelgehƤuse und andererseits mit einer Durchgangsƶffnung in der Zylinderkopfhaube fluchtet. Ein Befestigen der Zylinderkopfhaube und des Lageroberteils am ZylinderkurbelgehƤuse ist Ć¼ber eine gemeinsame Befestigungsschraube mƶglich.The DE 10 2007 025 129 A1 discloses a cylinder head cover for covering a cylinder crankcase of an internal combustion engine. At least one upper bearing part for a camshaft has at least one through opening which is aligned on the one hand with a screw-in / through opening in a lower bearing part and / or a screw-in opening in the cylinder crankcase and on the other hand with a through opening in the cylinder head cover. The cylinder head cover and the upper bearing part can be fastened to the cylinder crankcase using a common fastening screw.

Die EP 1 936 130 A2 offenbart eine Lagervorrichtung fĆ¼r zwei Nockenwellen. Ein Lagerkƶrper fĆ¼r beide Nockenwellen kann durch einen Bolzen an einem Zylinderkopf befestigt werden.The EP 1 936 130 A2 discloses a bearing device for two camshafts. A bearing body for both camshafts can be attached to a cylinder head by means of a bolt.

Die WO 2010/086517 A1 offenbart ein Verfahren zum Positionieren zweier mechanischer GieƟerei- oder Schmiedeteile zueinander sowie eine nach einem solchen Verfahren hergestellte Baugruppe.The WO 2010/086517 A1 discloses a method for positioning two mechanical foundry or forged parts with respect to one another and an assembly manufactured according to such a method.

Die CN 102 061 952 A offenbart einen Nockenwellenlagersitz, der einen Lagersitzkƶrper, der am oberen Teil eines Zylinderdeckels eines Fahrzeugmotors angeordnet ist und mit einem Befestigungsloch zum Befestigen einer Nockenwelle versehen ist; umfasst. Eine exzentrische Wellenbohrung zum Befestigen einer exzentrischen Welle ist an einer Seite der Befestigungsbohrung angeordnet. Die Achsen der Befestigungsbohrung und der exzentrischen Wellenbohrung sind parallel. Der Lagersitzkƶrper ist mit einer Verbindungsbohrung zum Befestigen des Lagersitzkƶrpers versehen.The CN 102 061 952 A discloses a camshaft bearing seat comprising a bearing seat body which is disposed on the upper part of a cylinder cover of a vehicle engine and is provided with a mounting hole for mounting a camshaft; includes. An eccentric shaft hole for fixing an eccentric shaft is arranged on one side of the fixing hole. The axes of the mounting hole and the eccentric shaft hole are parallel. The bearing seat body is provided with a connecting hole for attaching the bearing seat body.

Die WO 2012/055150 A1 bezieht sich auf eine Zylinderkopfschmierstruktur mit einem Zylinderkopfkƶrper, einem vorderen Nockenwellenlagerdeckel, einem mittleren Nockenwellenlagerdeckel und einem hinteren Nockenwellenlagerdeckel sowie einer darin vorgesehenen Nockenwellenbuchse. Jeder Lagerdeckel weist eine auf den Lagerdeckeln montierte Kipphebelwelle auf.The WO 2012/055150 A1 relates to a cylinder head lubrication structure comprising a cylinder head body, a front camshaft bearing cap, a middle camshaft bearing cap and a rear camshaft bearing cap and a camshaft bushing provided therein. Each bearing cap has a rocker arm shaft mounted on the bearing caps.

Der Erfindung liegt die Aufgabe zu Grunde, eine alternative oder verbesserte Vorrichtung zum drehbaren Lagern einer Nockenwelle vorzusehen. Insbesondere soll ein einfacher und bauraumoptimierter Aufbau realisiert werden.The invention is based on the object of providing an alternative or improved device for the rotatable mounting of a camshaft. In particular, a simple and space-optimized structure is to be implemented.

Die Aufgabe wird gelƶst durch eine Vorrichtung gemƤƟ dem unabhƤngigen Anspruch. Vorteilhafte Weiterbildungen sind in den abhƤngigen AnsprĆ¼chen und der Beschreibung angegeben.The object is achieved by a device according to the independent claim. Advantageous developments are given in the dependent claims and the description.

Die Vorrichtung ist zum drehbaren Lagern einer Nockenwelle einer Brennkraftmaschine vorgesehen. Die Vorrichtung weist einen ersten Lagerkƶrper mit einer Aufnahme zum drehbaren Lagern der Nockenwelle auf. Die Vorrichtung weist einen Zylinderkopf oder einen Befestigungsrahmen zur Befestigung des ersten Lagerkƶrpers auf. Die Vorrichtung weist ein erstes Befestigungsmittel (zum Beispiel eine erste Befestigungsschraube), das den ersten Lagerkƶrper am Zylinderkopf oder Befestigungsrahmen befestigt, auf. Das erste Befestigungsmittel ist das einzige Befestigungsmittel, das den ersten Lagerkƶrper am Zylinderkopf oder Befestigungsrahmen befestigt (fixiert, festlegt).The device is provided for the rotatable mounting of a camshaft of an internal combustion engine. The device has a first bearing body with a receptacle for the rotatable mounting of the camshaft. The device has a cylinder head or a fastening frame for fastening the first bearing body. The device has a first fastening means (for example a first fastening screw) which fastens the first bearing body to the cylinder head or fastening frame. The first fastening means is the only fastening means that fasten (fixes, fixes) the first bearing body to the cylinder head or fastening frame.

Die Vorrichtung bietet den Vorteil, dass eine bauraumgĆ¼nstigere Gestaltung des ersten Lagerkƶrpers ermƶglicht wird. Der erste Lagerkƶrper muss nur noch einseitig neben der Nockenwellenaufnahme genĆ¼gend Material fĆ¼r die Aufnahme des Befestigungsmittels bereitstellen. Insbesondere kann der erste Lagerkƶrper asymmetrisch bezĆ¼glich einer Vertikalebene durch eine MittellƤngsachse der Aufnahme ausgebildet sein. ZusƤtzlich kƶnnen sich die Herstellungskosten verringern, da weniger Befestigungsmittel benƶtigt werden, weniger Aufnahmen fĆ¼r Befestigungsmittel (zum Beispiel Schraubenlƶcher) hergestellt werden mĆ¼ssen und sich die Montagezeit verringert. Je nach AusfĆ¼hrung kann der erste Lagerkƶrper entweder an einem Zylinderkopf oder an einem Befestigungsrahmen befestigt sein.The device offers the advantage that a more space-saving design of the first bearing body is made possible. The first bearing body only has to provide enough material on one side next to the camshaft receptacle to accommodate the fastening means. In particular, the first bearing body can be designed asymmetrically with respect to a vertical plane through a central longitudinal axis of the receptacle. In addition, the manufacturing costs can be reduced, since fewer fasteners are required, fewer receptacles for fasteners (for example screw holes) have to be produced and the assembly time is reduced. Depending on the design, the first bearing body can be attached either to a cylinder head or to a mounting frame.

Da nur noch eine Aufnahme (z. B. Sackloch o. Ƥ.) fĆ¼r das einzige Befestigungsmittel vorgesehen werden muss, kann der Zylinderkopf oder Befestigungsrahmen ebenfalls freier gestaltet werden.Since only one receptacle (e.g. blind hole or the like) has to be provided for the single fastening means, the cylinder head or fastening frame can also be designed more freely.

Insbesondere kann der erste Lagerkƶrper einen ersten Seitenbereich, in dem das erste Befestigungsmittel aufgenommen ist, und einen zweiten Seitenbereich gegenĆ¼ber dem ersten Seitenbereich bezĆ¼glich der Aufnahme fĆ¼r die Nockenwelle aufweisen. Der Zylinderkopf kann einen Strƶmungskanal aufweisen, der sich in einem Bereich des Zylinderkopfes erstreckt, der neben dem (beispielsweise angrenzend an den) zweiten Seitenbereich (beispielsweise unterhalb des zweiten Seitenbereichs bezĆ¼glich einer Vertikalachse) des ersten Lagerkƶrpers angeordnet ist. Der Strƶmungskanal kann vorzugsweise eine gussvorsprungfreie Form (Gestaltung) in diesem Bereich aufweisen. Dies wird dadurch ermƶglicht, dass kein Gussbutzen (Gussvorsprung) zum Aufnehmen eines Sacklochs fĆ¼r ein weiteres Befestigungsmittel nƶtig ist. Damit kann das Vorsehen nur eines einzigen Befestigungsmittels zu einer strƶmungsoptimierten Gestaltung eines Strƶmungskanals im Zylinderkopf beitragen.In particular, the first bearing body can have a first side area in which the first fastening means is received, and a second side area opposite the first side area with respect to the receptacle for the camshaft. The cylinder head can have a flow channel which extends in a region of the cylinder head which is arranged next to (for example adjacent to) the second side region (for example below the second side region with respect to a vertical axis) of the first bearing body. The flow channel can preferably have a shape (design) free of casting protrusions in this area. This is made possible by the fact that no casting slug (casting projection) is required to accommodate a blind hole for a further fastening means. The provision of only a single fastening means can thus contribute to a flow-optimized design of a flow channel in the cylinder head.

Vorzugsweise kann die Aufnahme fĆ¼r die Nockenwelle ein zylindrisches Durchgangsloch oder eine Vertiefung in Form eines halben Zylinders sein.The receptacle for the camshaft can preferably be a cylindrical through hole or a recess in the form of a half cylinder.

Bevorzugt kann bei Verwendung eines Befestigungsrahmens zum Befestigen des ersten Lagerkƶrpers der Befestigungsrahmen an einem Zylinderkopf befestigt (fixiert, festgelegt) sein.Preferably, when using a fastening frame for fastening the first bearing body, the fastening frame can be fastened (fixed, fixed) to a cylinder head.

Es ist auch mƶglich, dass die Nockenwelle als obenliegende Nockenwelle angeordnet ist. Beispielsweise bei Verwendung eines Kipphebels mit Nockenfolger zum Folgen einer Nockenkontur der Nockenwelle wird die Nockenwelle im Betrieb nach unten gedrĆ¼ckt. Damit neigt die Nockenwelle nicht dazu, abzuheben, wodurch das Verwenden eines einzigen Befestigungsmittels ausreichend sein kann.It is also possible for the camshaft to be arranged as an overhead camshaft. For example, when using a rocker arm with a cam follower to follow a cam contour the camshaft, the camshaft is pressed down during operation. This means that the camshaft does not tend to lift, which means that the use of a single fastening means can be sufficient.

In einer AusfĆ¼hrungsform ist das erste Befestigungsmittel eine erste Befestigungsschraube. Insbesondere kann die erste Befestigungsschraube die einzige Befestigungsschraube sein, die den ersten Lagerkƶrper am Zylinderkopf oder Befestigungsrahmen befestigt.In one embodiment, the first fastening means is a first fastening screw. In particular, the first fastening screw can be the only fastening screw that attaches the first bearing body to the cylinder head or fastening frame.

Vorzugsweise kann der erste Lagerkƶrper ein Durchgangsloch zur Aufnahme des ersten Befestigungsmittels, insbesondere der ersten Befestigungsschraube, das/die sich durch das Durchgangsloch erstreckt, aufweisen.The first bearing body can preferably have a through hole for receiving the first fastening means, in particular the first fastening screw, which extends through the through hole.

In einer weiteren AusfĆ¼hrungsform befestigt das erste Befestigungsmittel den ersten Lagerkƶrper kraft- und formschlĆ¼ssig am Zylinderkopf oder Befestigungsrahmen.In a further embodiment, the first fastening means fasten the first bearing body to the cylinder head or fastening frame in a non-positive and positive manner.

Bevorzugt kann das erste Befestigungsmittel ein lƶsbares Befestigungsmittel sein.The first fastening means can preferably be a releasable fastening means.

Insbesondere kann das erste Befestigungsmittel das einzige (bspw. lƶsbare) Befestigungsmittel der Vorrichtung sein.In particular, the first fastening means can be the only (for example detachable) fastening means of the device.

In einer AusfĆ¼hrungsvariante bildet der erste Lagerkƶrper einen einteiligen Lagerbock zum Lagern der Nockenwelle.In one embodiment variant, the first bearing body forms a one-piece bearing block for mounting the camshaft.

Alternativ weist die Vorrichtung einen zweiten Lagerkƶrper mit einer Aufnahme (zum Beispiel als Vertiefung in Form eines halben Zylinders) zum Lagern der Nockenwelle auf. Der erste Lagerkƶrper und der zweite Lagerkƶrper bilden gemeinsam einen zweiteiligen Lagerbock. Die Aufnahme (zum Beispiel als Vertiefung in Form eines halben Zylinders) des ersten Lagerkƶrpers und die Aufnahme (zum Beispiel als Vertiefung in Form eines halben Zylinders) des zweiten Lagerkƶrpers bilden eine gemeinsame Aufnahme fĆ¼r die Nockenwelle.Alternatively, the device has a second bearing body with a receptacle (for example as a recess in the form of a half cylinder) for bearing the camshaft. The first bearing body and the second bearing body together form a two-part bearing block. The receptacle (for example as a recess in the form of a half cylinder) of the first bearing body and the receptacle (for example as a recess in the form of a half cylinder) of the second bearing body form a common receptacle for the camshaft.

Damit ist die vorliegende Offenbarung nicht nur fĆ¼r einteilige Lagerbƶcke, sondern auch fĆ¼r zweiteilige Lagerbƶcke, verwendbar. Folglich kann die vorliegende Offenbarung nicht nur mit gebauten Nockenwellen, sondern auch mit geschmiedeten Nockenwellen verwendet werden, wo ein AuffƤdeln der Lagerbƶcke nicht mƶglich ist.The present disclosure can therefore not only be used for one-piece bearing blocks, but also for two-part bearing blocks. Consequently, the present disclosure can be used not only with assembled camshafts, but also with forged camshafts, where threading of the bearing blocks is not possible.

Vorzugsweise kann der zweite Lagerkƶrper ein Durchgangsloch zur Aufnahme des ersten Befestigungsmittels, insbesondere der ersten Befestigungsschraube, das/die sich durch das Durchgangsloch erstreckt, aufweisen. Das Durchgangsloch des ersten Lagerkƶrpers und das Durchgangsloch des zweiten Lagerkƶrpers kƶnnen zueinander fluchtend ausgerichtet sein.The second bearing body can preferably have a through hole for receiving the first fastening means, in particular the first fastening screw, which extends through the Extends through hole. The through hole of the first bearing body and the through hole of the second bearing body can be aligned with one another.

In einer Weiterbildung sind der erste Lagerkƶrper und der zweite Lagerkƶrper Ć¼ber ein zweites Befestigungsmittel, insbesondere eine zweite Befestigungsschraube, aneinander, vorzugsweise kraft- und formschlĆ¼ssig, befestigt.In one development, the first bearing body and the second bearing body are fastened to one another, preferably in a non-positive and positive manner, via a second fastening means, in particular a second fastening screw.

Insbesondere kƶnnen das erste Befestigungsmittel und das zweite Befestigungsmittel auf gegenĆ¼berliegenden Seiten des ersten Lagerkƶrper bezĆ¼glich der Aufnahme fĆ¼r die Nockenwelle vorgesehen sein.In particular, the first fastening means and the second fastening means can be provided on opposite sides of the first bearing body with respect to the receptacle for the camshaft.

Vorzugsweise kann das zweite Befestigungsmittel ein lƶsbares Befestigungsmittel sein.The second fastening means can preferably be a releasable fastening means.

In einer besonders bevorzugten AusfĆ¼hrungsform sind das erste Befestigungsmittel und das zweite Befestigungsmittel, insbesondere die erste Befestigungsschraube und die zweite Befestigungsschraube, die einzigen Befestigungsmittel der Vorrichtung.In a particularly preferred embodiment, the first fastening means and the second fastening means, in particular the first fastening screw and the second fastening screw, are the only fastening means of the device.

In einer weiteren AusfĆ¼hrungsvariante befestigt das erste Befestigungsmittel zusƤtzlich den zweiten Lagerkƶrper am Zylinderkopf oder Befestigungsrahmen. Es ist auch mƶglich, dass das erste Befestigungsmittel das einzige Befestigungsmittel ist, das den zweiten Lagerkƶrper am ersten Lagerkƶrper befestigt.In a further embodiment variant, the first fastening means additionally fasten the second bearing body to the cylinder head or fastening frame. It is also possible for the first fastening means to be the only fastening means that fasten the second bearing body to the first bearing body.

In einem AusfĆ¼hrungsbeispiel weist die Vorrichtung ferner mindestens ein Positionierelement auf, das zwischen dem ersten Lagerkƶrper und dem zweiten Lagerkƶrper zum Positionieren des ersten Lagerkƶrpers relativ zum zweiten Lagerkƶrper angeordnet ist. Damit kann insbesondere sichergestellt werden, dass die Nockenwellenaufnahmen der Lagerkƶrper zueinander ausgerichtet sind. Insbesondere kƶnnen die Positionierelemente den ersten Lagerkƶrper zum zweiten Lagerkƶrper in einer Ebene senkrecht zur LƤngsachse des ersten Befestigungsmittels positionieren.In one embodiment, the device also has at least one positioning element which is arranged between the first bearing body and the second bearing body for positioning the first bearing body relative to the second bearing body. It can thus be ensured in particular that the camshaft receptacles of the bearing bodies are aligned with one another. In particular, the positioning elements can position the first bearing body relative to the second bearing body in a plane perpendicular to the longitudinal axis of the first fastening means.

Alternativ kann die Vorrichtung kein Positionierelement zum Positionieren des ersten oder zweiten Lagerkƶrpers relativ zum Zylinderkopf oder Befestigungsrahmen aufweisen. Damit kƶnnen die Kosten fĆ¼r die Positionierelemente eingespart werden.Alternatively, the device can have no positioning element for positioning the first or second bearing body relative to the cylinder head or mounting frame. The costs for the positioning elements can thus be saved.

In einer Weiterbildung umfasst das mindestens eine, zwischen dem ersten Lagerkƶrper und dem zweiten Lagerkƶrper angeordnete Positionierelement einen Positionierstift, eine das erste Befestigungsmittel umgebende PasshĆ¼lse und/oder eine das zweite Befestigungsmittel umgebende PasshĆ¼lse. Hierbei kann insbesondere die Verwendung von PasshĆ¼lsen eine kleine Dimensionierung der Lagerkƶrper ermƶglichen, da keine zusƤtzlichen Materialbereiche fĆ¼r das Vorsehen von Bohrungen fĆ¼r Positionierstifte benƶtigt werden.In a further development, the at least one positioning element arranged between the first bearing body and the second bearing body comprises a positioning pin, a fitting sleeve surrounding the first fastening means and / or a fitting sleeve surrounding the second fastening means. In particular, the use of fitting sleeves can be a allow small dimensions of the bearing body, since no additional material areas are required for the provision of holes for positioning pins.

In einem AusfĆ¼hrungsbeispiel weist die Vorrichtung ferner mindestens ein Positionierelement auf, das zwischen dem ersten oder zweiten Lagerkƶrper und dem Zylinderkopf oder dem Befestigungsrahmen zum Positionieren des ersten oder zweiten Lagerkƶrpers relativ zum Zylinderkopf oder Befestigungsrahmen angeordnet ist. Damit kann eine Ausrichtung des entsprechenden Lagerkƶrpers relativ zum Zylinderkopf oder Befestigungsrahmen verbessert werden. Insbesondere kƶnnen die Positionierelemente den ersten oder zweiten Lagerkƶrper zum Zylinderkopf oder Befestigungsrahmen in einer Ebene senkrecht zur LƤngsachse des ersten Befestigungsmittels positionieren.In one embodiment, the device also has at least one positioning element which is arranged between the first or second bearing body and the cylinder head or the fastening frame for positioning the first or second bearing body relative to the cylinder head or fastening frame. Alignment of the corresponding bearing body relative to the cylinder head or mounting frame can thus be improved. In particular, the positioning elements can position the first or second bearing body relative to the cylinder head or fastening frame in a plane perpendicular to the longitudinal axis of the first fastening means.

In einer Weiterbildung umfasst das mindestens eine, zwischen dem ersten oder zweiten Lagerkƶrper und dem Zylinderkopf oder dem Befestigungsrahmen angeordnete Positionierelement einen Positionierstift und/oder eine PasshĆ¼lse, die das erste Befestigungsmittel umgibt. Die Verwendung von einer PasshĆ¼lse kann eine kleine Dimensionierung der Lagerkƶrper ermƶglichen, da keine zusƤtzlichen Materialbereiche fĆ¼r das Vorsehen von Bohrungen fĆ¼r Positionierstifte benƶtigt werden.In a further development, the at least one positioning element arranged between the first or second bearing body and the cylinder head or the fastening frame comprises a positioning pin and / or a fitting sleeve which surrounds the first fastening means. The use of a fitting sleeve can enable the bearing body to be dimensioned small, since no additional material areas are required for the provision of bores for positioning pins.

Es ist allerdings auch mƶglich, kein Positionierelement zwischen dem ersten oder zweiten Lagerkƶrper und dem Zylinderkopf oder dem Befestigungsrahmen vorzusehen. Eine Ausrichtung zwischen dem entsprechenden Lagerkƶrper und dem Zylinderkopf (oder dem Befestigungsrahmen) kƶnnte dann mittels FĆ¼hrung durch die Nockenwelle ermƶglicht werden. Die Nockenwelle ist in mehreren, in LƤngsrichtung der Nockenwelle beabstandeten Vorrichtungen zum drehbaren Lagern der Nockenwelle gelagert.However, it is also possible not to provide a positioning element between the first or second bearing body and the cylinder head or the fastening frame. Alignment between the corresponding bearing body and the cylinder head (or the mounting frame) could then be made possible by means of guidance through the camshaft. The camshaft is mounted in several devices, spaced apart in the longitudinal direction of the camshaft, for the rotatable mounting of the camshaft.

Die Vorrichtung der Erfindung weist eine Kipphebelachse zum drehbaren Lagern eines Kipphebels auf. Das erste Befestigungsmittel befestigt zusƤtzlich die Kipphebelachse am Zylinderkopf oder Befestigungsrahmen, und insbesondere auch am ersten und/oder zweiten Lagerkƶrper. Damit kann ein weiteres zusƤtzliches Befestigungsmittel zum Befestigen der Kipphebelachse eingespart werden. Folglich kann auch die Montagezeit verringert werden.The device of the invention has a rocker arm shaft for rotatably supporting a rocker arm. The first fastening means additionally fasten the rocker arm axis to the cylinder head or fastening frame, and in particular also to the first and / or second bearing body. A further additional fastening means for fastening the rocker arm shaft can thus be saved. As a result, the assembly time can also be reduced.

In einer AusfĆ¼hrungsform weist der erste Lagerkƶrper eine Aufnahme fĆ¼r die Kipphebelachse auf, die vorzugsweise an einer dem Zylinderkopf oder Befestigungsrahmen gegenĆ¼berliegenden Seite des ersten Lagerkƶrpers angeordnet ist.In one embodiment, the first bearing body has a receptacle for the rocker arm axis, which is preferably arranged on a side of the first bearing body opposite the cylinder head or fastening frame.

In einer weiteren AusfĆ¼hrungsform steht ein SchmierfluidlƤngskanal der Kipphebelachse mit der Aufnahme fĆ¼r die Nockenwelle des ersten Lagerkƶrpers in Fluidverbindung, vorzugsweise Ć¼ber einen Stichkanal des ersten Lagerkƶrpers und einen Stichkanal der Kipphebelachse. Damit kann ein Schmierfluid Ć¼ber die Kipphebelachse zu einem Gleitlager der Nockenwelle flieƟen.In a further embodiment, a longitudinal lubricating fluid channel of the rocker arm axis is in fluid connection with the receptacle for the camshaft of the first bearing body, preferably via a branch channel of the first bearing body and a branch channel of the rocker arm axis. In this way, a lubricating fluid can flow via the rocker arm axis to a plain bearing of the camshaft.

In einer AusfĆ¼hrungsvariante weist der Befestigungsrahmen oder der Zylinderkopf ein Loch, insbesondere ein Sackloch oder ein Durchgangsloch, mit einem Gewinde zur kraft- und formschlĆ¼ssigen Befestigung des ersten Lagerkƶrpers am Befestigungsrahmen oder Zylinderkopf mittels des ersten Befestigungsmittels auf. Damit kann das erste Befestigungsmittel insbesondere in Form einer Befestigungsschraube zur Befestigung des ersten Lagerkƶrper (und gegebenenfalls des zweiten Lagerkƶrpers) direkt in das Sackloch eingeschraubt werden.In one embodiment, the fastening frame or the cylinder head has a hole, in particular a blind hole or a through hole, with a thread for non-positive and positive fastening of the first bearing body to the fastening frame or cylinder head by means of the first fastening means. The first fastening means can thus be screwed directly into the blind hole, in particular in the form of a fastening screw for fastening the first bearing body (and optionally the second bearing body).

In einer weiteren AusfĆ¼hrungsvariante ist der erste Lagerkƶrper asymmetrisch bezĆ¼glich einer Vertikalebene durch eine MittellƤngsachse der Aufnahme fĆ¼r die Nockenwelle ausgebildet. Dies wird insbesondere durch das Vorsehen eines einzigen Befestigungsmittels (das erste Befestigungsmittel) zum Befestigen an dem Zylinderkopf oder Befestigungsrahmen ermƶglicht.In a further embodiment variant, the first bearing body is designed asymmetrically with respect to a vertical plane through a central longitudinal axis of the receptacle for the camshaft. This is made possible in particular by the provision of a single fastening means (the first fastening means) for fastening to the cylinder head or fastening frame.

Alternativ oder zusƤtzlich kann das erste Befestigungsmittel ein Kippmoment zum AbstĆ¼tzen des ersten Lagerkƶrpers auf einer AuflageflƤche des Zylinderkopfes oder Befestigungsrahmens erzeugen.Alternatively or additionally, the first fastening means can generate a tilting moment for supporting the first bearing body on a support surface of the cylinder head or fastening frame.

Die Erfindung betrifft auch ein Kraftfahrzeug, insbesondere Nutzfahrzeug, mit einer Vorrichtung wie hierin offenbart. Das Nutzfahrzeug kann beispielsweise ein Lastkraftwagen oder ein Omnibus sein.The invention also relates to a motor vehicle, in particular a utility vehicle, with a device as disclosed herein. The utility vehicle can be, for example, a truck or a bus.

Es ist auch mƶglich, die Vorrichtung wie hierin offenbart fĆ¼r Personenkraftwagen, GroƟmotoren, gelƤndegƤngige Fahrzeuge, stationƤre Motoren, Marinemotoren usw. zu verwenden.It is also possible to use the device as disclosed herein for passenger cars, large engines, all-terrain vehicles, stationary engines, marine engines and the like.

Die zuvor beschriebenen bevorzugten AusfĆ¼hrungsformen und Merkmale der Erfindung sind beliebig miteinander kombinierbar. Weitere Einzelheiten und Vorteile der Erfindung werden im Folgenden unter Bezug auf die beigefĆ¼gten Zeichnungen beschrieben. Es zeigen:

Figur 1
eine Schnittansicht durch eine Vorrichtung zum drehbaren Lagern einer Nockenwelle; und
Figur 2
eine Schnittansicht durch eine Vorrichtung zum drehbaren Lager einer Nockenwelle gemƤƟ einem weiteren AusfĆ¼hrungsbeispiel.
The preferred embodiments and features of the invention described above can be combined with one another as desired. Further details and advantages of the invention are described below with reference to the accompanying drawings. Show it:
Figure 1
a sectional view through a device for rotatably supporting a camshaft; and
Figure 2
a sectional view through a device for the rotatable bearing of a camshaft according to a further embodiment.

Die in den Figuren gezeigten AusfĆ¼hrungsformen stimmen zumindest teilweise Ć¼berein, so dass Ƥhnliche oder identische Teile mit den gleichen Bezugszeichen versehen sind und zu deren ErlƤuterung auch auf die Beschreibung der anderen AusfĆ¼hrungsformen bzw. Figuren verwiesen wird, um Wiederholungen zu vermeiden.The embodiments shown in the figures match at least in part, so that similar or identical parts are provided with the same reference symbols and reference is made to the description of the other embodiments or figures for their explanation in order to avoid repetition.

Die Figur 1 zeigt eine Vorrichtung 10 zum drehbaren Lagern einer Nockenwelle 12. Die Vorrichtung 10 weist einen Lagerkƶrper 14, einen Zylinderkopf 16, eine Befestigungsschraube 18 und eine Kipphebelachse 20 auf.The Figure 1 shows a device 10 for rotatably mounting a camshaft 12. The device 10 has a bearing body 14, a cylinder head 16, a fastening screw 18 and a rocker arm shaft 20.

Die Vorrichtung 10 kann bei jeglicher Brennkraftmaschine zum Lagern der Nockenwelle 12 verwendet werden. Die Brennkraftmaschine kann beispielsweise in einem Kraftfahrzeug, insbesondere Nutzfahrzeug, umfasst sein. Das Nutzfahrzeug kann beispielsweise ein Lastkraftwagen oder ein Omnibus sein.The device 10 can be used for supporting the camshaft 12 in any internal combustion engine. The internal combustion engine can for example be included in a motor vehicle, in particular a utility vehicle. The utility vehicle can be, for example, a truck or a bus.

Der Lagerkƶrper 14 ist als einteiliger Lagerbock ausgebildet. Der Lagerkƶrper 14 weist eine Aufnahme 22 fĆ¼r die Nockenwelle 12 auf. Die Nockenwelle 12 kann Ć¼ber ein Gleitlager drehbar in der Aufnahme 22 gelagert. Die Aufnahme 22 ist eine zylindrische Durchgangsbohrung des Lagerkƶrpers 14. Die Nockenwelle 12 ist eine gebaute Nockenwelle. Ein zylindrischer Abschnitt der Nockenwelle 12 wird im demontierten Zustand der Nockenwelle 12 in die Aufnahme 22 eingeschoben. Die Nockenwelle 12 wird sodann zusammengesetzt. Zum drehbaren Lagern der Nockenwelle 12 ist eine Mehrzahl von Lagerkƶrpern 14 entlang einer LƤngsachse der Nockenwelle 12 vorgesehen. Die Nockenwelle 12 ist als eine obenliegende Nockenwelle (engl. overhead camshaft - OHC) angeordnet.The bearing body 14 is designed as a one-piece bearing block. The bearing body 14 has a receptacle 22 for the camshaft 12. The camshaft 12 can be rotatably mounted in the receptacle 22 via a slide bearing. The receptacle 22 is a cylindrical through hole of the bearing body 14. The camshaft 12 is a built-up camshaft. A cylindrical section of the camshaft 12 is pushed into the receptacle 22 in the dismantled state of the camshaft 12. The camshaft 12 is then assembled. For the rotatable mounting of the camshaft 12, a plurality of bearing bodies 14 are provided along a longitudinal axis of the camshaft 12. The camshaft 12 is arranged as an overhead camshaft (OHC).

Der Lagerkƶrper 14 ist Ć¼ber die Befestigungsschraube 18 an dem Zylinderkopf 16 befestigt (fixiert). Im Einzelnen erstreckt sich die Befestigungsschraube 18 durch ein Durchgangsloch 24 des Lagerkƶrpers 14. Die Befestigungsschraube 18 ist in ein Gewinde eines Sacklochs 26 des Zylinderkopfes 16 eingeschraubt. Das Sackloch 26 erstreckt sich hinein in einen Gussbutzen (Gussvorsprung) 27, die insbesondere zum Vorsehen des Sacklochs 26 oder eines Durchgangslochs geformt ist.The bearing body 14 is fastened (fixed) to the cylinder head 16 via the fastening screw 18. In detail, the fastening screw 18 extends through a through hole 24 of the bearing body 14. The fastening screw 18 is screwed into a thread of a blind hole 26 of the cylinder head 16. The blind hole 26 extends into a casting slug (casting projection) 27, which is shaped in particular to provide the blind hole 26 or a through hole.

Hierbei ist hervorzuheben, dass die Befestigungsschraube 18 die einzige Befestigungsschraube ist, die den Lagerkƶrper 14 am Zylinderkopf 16 befestigt. Herkƶmmliche Lagerbƶcke verwenden zumeist zwei oder vier Befestigungsschrauben zum Befestigen des Lagerkƶrpers am Zylinderkopf.It should be emphasized here that the fastening screw 18 is the only fastening screw that attaches the bearing body 14 to the cylinder head 16. Conventional bearing blocks mostly use two or four fastening screws to fasten the bearing body to the cylinder head.

Es wurde herausgefunden, dass die Befestigungsschraube 18 als einzige Befestigungsschraube fĆ¼r den Lagerkƶrper 14 ausreichend ist. Die Nockenwelle 12 wird wƤhrend des Betriebs vom Nockenfolger des Kipphebels nach unten gedrĆ¼ckt. Das Eigengewicht der Nockenwelle 12 wirkt ebenfalls nach unten. Die Nockenwelle 12 zeigt somit keine Tendenz gemeinsam mit dem Lagerkƶrper 14 vom Zylinderkopf 16 abzuheben. AuƟerdem wird durch die Schraubenkraft der Befestigungsschraube 18 und einen einseitigen Materialbereich neben der Befestigungsschraube 18 (links in Figur 1) ein Kippmoment an einer AuflageflƤche 29 zum Zylinderkopf 16 erzeugt, das den ersten Lagerkƶrper 14 sicher am Zylinderkopf 16 hƤlt.It has been found that the fastening screw 18 is sufficient as the only fastening screw for the bearing body 14. The camshaft 12 is pushed downward by the cam follower of the rocker arm during operation. The weight of the camshaft 12 also acts downwards. The camshaft 12 thus shows no tendency to lift off the cylinder head 16 together with the bearing body 14. In addition, the screw force of the fastening screw 18 and a one-sided material area next to the fastening screw 18 (left in Figure 1 ) a tilting moment is generated on a bearing surface 29 to the cylinder head 16, which holds the first bearing body 14 securely on the cylinder head 16.

Ein Vorteil der Verwendung von nur einer Befestigungsschraube 18 ist die bauraumgĆ¼nstigere Dimensionierung des Lagerkƶrpers 14 und das Einsparen der Kosten fĆ¼r weitere Befestigungsschrauben. Im Einzelnen muss der Lagerkƶrper 14 ausgehend von der Aufnahme 22 nur einseitig einen Materialbereich zum Aufnehmen der Befestigungsschraube 18 aufweisen. Auf der gegenĆ¼berliegenden Seite kann der Lagerkƶrper 14 direkt mit einem die Aufnahme 22 begrenzenden Wandbereich enden. Damit kann der Lagerkƶrper 14 besser an den zur VerfĆ¼gung stehenden Bauraum angepasst sein. Insbesondere kann der Lagerkƶrper 14 asymmetrisch bezĆ¼glich einer Vertikalebene durch eine MittellƤngsachse der Aufnahme 22 des Lagerkƶrpers 14 ausgebildet sein.One advantage of using only one fastening screw 18 is the more space-saving dimensioning of the bearing body 14 and the saving of the costs for further fastening screws. In detail, starting from the receptacle 22, the bearing body 14 only has to have a material area on one side for receiving the fastening screw 18. On the opposite side, the bearing body 14 can end directly with a wall area delimiting the receptacle 22. The bearing body 14 can thus be better adapted to the available installation space. In particular, the bearing body 14 can be configured asymmetrically with respect to a vertical plane through a central longitudinal axis of the receptacle 22 of the bearing body 14.

ZusƤtzlich ergibt sich ein grĆ¶ĆŸerer Freiheitsgrad hinsichtlich der Gestaltung des Zylinderkopfes 16. Der Zylinderkopf 16 muss insbesondere im Bereich A keinen Gussbutzen (keinen Gussvorsprung) zum Vorsehen eines Sacklochs zum Einschrauben einer Befestigungsschraube aufweisen. Stattdessen kann der Bereich A beispielsweise strƶmungsoptimiert fĆ¼r einen Fluidkanal 28 im Zylinderkopf 16 geformt werden.In addition, there is a greater degree of freedom with regard to the design of the cylinder head 16. The cylinder head 16 does not have to have any casting slugs (no casting projection) for providing a blind hole for screwing in a fastening screw, in particular in area A. Instead, the area A can, for example, be shaped in a flow-optimized manner for a fluid channel 28 in the cylinder head 16.

Letztlich kann auch eine Teileanzahl der Vorrichtung aufgrund der Verringerung der Befestigungsschrauben reduziert werden. Zudem sinken die Herstellungszeit und die Montagezeit, da weniger Schraubenlƶcher gefertigt und weniger Befestigungsschrauben montiert werden mĆ¼ssen.Ultimately, the number of parts of the device can also be reduced due to the reduction in the number of fastening screws. In addition, the production time and the assembly time are reduced, since fewer screw holes have to be made and fewer fastening screws have to be installed.

ZusƤtzlich wird darauf hingewiesen, dass die die vorliegende Offenbarung nicht darauf beschrƤnkt ist, dass die Befestigungsschraube 18 den Lagerkƶrper 14 an dem Zylinderkopf 16 befestigt. Alternativ kƶnnte die Befestigungsschraube 18 den Lagerkƶrper 14 an einem Befestigungsrahmen 30 befestigen. Der Befestigungsrahmen 30 kƶnnte dann wiederum an einem Zylinderkopf befestigt sein. Mit anderen Worten gesagt, das in Figur 1 unter dem Lagerkƶrper 14 dargestellte Bauteil kƶnnte statt eines Bereichs eines Zylinderkopfes 16 alternativ ein Bereich eines Befestigungsrahmens 30 sein.In addition, it should be noted that the present disclosure is not limited to the fastening screw 18 attaching the bearing body 14 to the cylinder head 16 attached. Alternatively, the fastening screw 18 could fasten the bearing body 14 to a fastening frame 30. The fastening frame 30 could then in turn be fastened to a cylinder head. In other words, the in Figure 1 The component shown below the bearing body 14 could alternatively be an area of a fastening frame 30 instead of an area of a cylinder head 16.

Alternativ zur Befestigungsschraube 18 kƶnnte auch ein anderes Befestigungsmittel zum kraftschlĆ¼ssigen und formschlĆ¼ssigen Befestigen des Lagerkƶrpers 14 an dem Zylinderkopf 16 verwendet werden.As an alternative to the fastening screw 18, another fastening means could also be used for the force-fitting and form-fitting fastening of the bearing body 14 to the cylinder head 16.

Die Kipphebelachse 20 dient zum drehbaren Lagern eines Kipphebels (nicht dargestellt). Der Kipphebel steht Ć¼ber einen Nockenfolger in Wirkverbindung zwischen der Nockenwelle 12 und einem oder mehreren Gaswechselventilen (nicht dargestellt) zum BetƤtigen der Gaswechselventile.The rocker arm shaft 20 is used for the rotatable mounting of a rocker arm (not shown). The rocker arm is operatively connected via a cam follower between the camshaft 12 and one or more gas exchange valves (not shown) for actuating the gas exchange valves.

In der dargestellten AusfĆ¼hrungsform von Figur 1 befestigt die Befestigungsschraube 18 zusƤtzlich die Kipphebelachse 20 am Zylinderkopf 16 (Befestigungsrahmen 30). Im Einzelnen erstreckt sich die Befestigungsschraube 18 durch ein Durchgangsloch 32 der Kipphebelachse 20. Im montierten Zustand der Vorrichtung 10 sind die Lƶcher 32, 24 und 26 miteinander entlang einer LƤngsachse der Befestigungsschraube 18 ausgerichtet. Ein Schraubenkopf 18A liegt auf einer AnlageflƤche 20A der Kipphebelachse 20 auf. Die Kipphebelachse 20 ist in einer Aufnahme 21 des Lagerkƶrpers 14 gelagert. Die zusƤtzliche Befestigung der Kipphebelachse 20 Ć¼ber die Befestigungsschraube 18 ist optional.In the illustrated embodiment of Figure 1 the fastening screw 18 also attaches the rocker arm shaft 20 to the cylinder head 16 (fastening frame 30). In detail, the fastening screw 18 extends through a through hole 32 of the rocker arm axis 20. In the assembled state of the device 10, the holes 32, 24 and 26 are aligned with one another along a longitudinal axis of the fastening screw 18. A screw head 18A rests on a contact surface 20A of the rocker arm axis 20. The rocker arm axis 20 is mounted in a receptacle 21 of the bearing body 14. The additional fastening of the rocker arm shaft 20 via the fastening screw 18 is optional.

Zum Schmieren des Gleitlagers in der Aufnahme 22 kann ein Schmierfluid Ć¼ber einen LƤngskanal 34 der Kipphebelachse 20 zugefĆ¼hrt werden. Ein Stichkanal 36 der Kipphebelachse 20 mĆ¼ndet in einen Stichkanal 38 des Lagerkƶrpers 14. Der Stichkanal 38 wiederum mĆ¼ndet in die Aufnahme 22.To lubricate the sliding bearing in the receptacle 22, a lubricating fluid can be supplied to the rocker arm shaft 20 via a longitudinal channel 34. A branch channel 36 of the rocker arm shaft 20 opens into a branch channel 38 of the bearing body 14. The branch channel 38 in turn opens into the receptacle 22.

Zum relativen Positionieren des Lagerkƶrpers 14 relativ zum Zylinderkopf 16 (Befestigungsrahmen 30) kƶnnen optional zusƤtzlich Positionierelemente 40, 42 verwendet werden. Die Positionierelemente 40, 42 positionieren den Lagerkƶrper 14 zum Zylinderkopf 16 in einer Ebene senkrecht zur LƤngsachse der Befestigungsschraube 18.For the relative positioning of the bearing body 14 relative to the cylinder head 16 (fastening frame 30), additional positioning elements 40, 42 can optionally be used. The positioning elements 40, 42 position the bearing body 14 relative to the cylinder head 16 in a plane perpendicular to the longitudinal axis of the fastening screw 18.

Das Positionierelement 40 ist als eine PasshĆ¼lse ausgebildet. Das Positionierelement 40 ist formschlĆ¼ssig in einer Ausnehmung 44 des Lagerkƶrpers 14 und einer Ausnehmung 46 des Zylinderkopfes 16 (Befestigungsrahmens 30) vorgesehen. Das Positionierelement 40 ist um die Befestigungsschraube 18 herum angeordnet, vorzugsweise ohne die Befestigungsschraube 18 zu berĆ¼hren.The positioning element 40 is designed as a fitting sleeve. The positioning element 40 is provided in a form-fitting manner in a recess 44 of the bearing body 14 and a recess 46 of the cylinder head 16 (fastening frame 30). The positioning element 40 is around the fastening screw 18 arranged around, preferably without touching the fastening screw 18.

Das Positionierelement 42 ist als ein Positionierstift ausgebildet. Das Positionierelement 42 ist formschlĆ¼ssig in einer Ausnehmung 48 des Lagerkƶrpers 14 und einer Ausnehmung 50 des Zylinderkopfes 16 (Befestigungsrahmens 30) vorgesehen. Die Positionierelemente kƶnnen bspw. auch als PasshĆ¼lsen ausgebildet sein.The positioning element 42 is designed as a positioning pin. The positioning element 42 is positively provided in a recess 48 of the bearing body 14 and a recess 50 of the cylinder head 16 (fastening frame 30). The positioning elements can, for example, also be designed as fitting sleeves.

Es wird darauf hingewiesen, dass auch AusfĆ¼hrungsformen ohne Positionierelement denkbar sind. Die Ausrichtung des Lagerkƶrpers 14 kƶnnte dann beispielsweise mittels einer FĆ¼hrung durch die Nockenwelle 12, die in mehreren Lagerkƶrpern 14 gelagert ist, ermƶglicht werden.It is pointed out that embodiments without a positioning element are also conceivable. The alignment of the bearing body 14 could then be made possible, for example, by means of a guide through the camshaft 12, which is mounted in a plurality of bearing bodies 14.

Die Figur 2 zeigt ein weiteres AusfĆ¼hrungsbeispiel fĆ¼r eine Vorrichtung 110 zum drehbaren Lagern der Nockenwelle 12. Die Vorrichtung 110 zeichnet sich insbesondere dadurch aus, dass sie auch zum drehbaren Lagern von geschmiedeten Nockenwellen geeignet ist, da hier ein AuffƤdeln der Lagerbƶcke nicht mƶglich ist.The Figure 2 shows a further embodiment of a device 110 for rotatably mounting the camshaft 12. The device 110 is characterized in particular by the fact that it is also suitable for the rotatable mounting of forged camshafts, since threading the bearing blocks is not possible here.

Statt eines einteiligen Lagerkƶrpers weist die Vorrichtung 110 einen ersten Lagerkƶrper 14A und einen zweiten Lagerkƶrper 14B auf. Der erste Lagerkƶrper 14A und der zweite Lagerkƶrper 14B bilden einen zweiteiligen Lagerbock. Der erste Lagerkƶrper 14A weist eine erste Aufnahme 22A und der zweite Lagerkƶrper 14B weist eine zweite Aufnahme 22B auf. Die Aufnahmen 22A, 22B bilden eine gemeinsame Aufnahme in Zylinderform fĆ¼r die Nockenwelle 12.Instead of a one-piece bearing body, the device 110 has a first bearing body 14A and a second bearing body 14B. The first bearing body 14A and the second bearing body 14B form a two-part bearing block. The first bearing body 14A has a first receptacle 22A and the second bearing body 14B has a second receptacle 22B. The receptacles 22A, 22B form a common receptacle in cylinder shape for the camshaft 12.

Bei dieser AusfĆ¼hrung ist erneut hervorzuheben, dass die Befestigungsschraube 18 die einzige Befestigungsschraube ist, die die Lagerkƶrper 14A, 14B am Zylinderkopf 16 (Befestigungsrahmen 30) befestigt (fixiert). Im Einzelnen erstreckt sich die Befestigungsschraube 18 durch ein Durchgangsloch 24A des ersten Lagerkƶrper 14A und ein Durchgangsloch 24B des zweiten Lagerkƶrper 14B.In this embodiment, it should again be emphasized that the fastening screw 18 is the only fastening screw that fastens (fixes) the bearing bodies 14A, 14B on the cylinder head 16 (fastening frame 30). In detail, the fastening screw 18 extends through a through hole 24A of the first bearing body 14A and a through hole 24B of the second bearing body 14B.

ZusƤtzlich kann eine zweite Befestigungsschraube 52 vorgesehen sein, die den ersten Lagerkƶrper 14A am zweiten Lagerkƶrper 14B befestigt. Die Befestigungsschrauben 18 und 52 kƶnnen auf gegenĆ¼berliegenden Seiten der Nockenwelle 12 positioniert sein. Die Befestigungsschraube 52 erstreckt sich durch ein Durchgangsloch 58 im ersten Lagerkƶrper 14A. Die Befestigungsschraube 52 ist in ein Gewinde eines Sacklochs 60 des zweiten Lagerkƶrpers 14B eingeschraubt.In addition, a second fastening screw 52 can be provided which fastens the first bearing body 14A to the second bearing body 14B. The mounting screws 18 and 52 may be positioned on opposite sides of the camshaft 12. The fastening screw 52 extends through a through hole 58 in the first bearing body 14A. The fastening screw 52 is screwed into a thread of a blind hole 60 of the second bearing body 14B.

Zum Positionieren der Lagerkƶrper 14A und 14B zueinander sind Positionierelemente 54 und 56 vorgesehen. Die Positionierelemente 54, 56 positionieren den ersten Lagerkƶrper 14A zum zweiten Lagerkƶrper 14B in einer Ebene senkrecht zur LƤngsachse der Befestigungsschraube 18. Die Positionierelemente 54, 56 sind als PasshĆ¼lsen ausgebildet, kƶnnen allerdings bspw. auch als Passstifte ausgebildet sein. Die Positionierelemente 54, 56 verbinden den ersten Lagerkƶrper 14A formschlĆ¼ssig mit dem zweiten Lagerkƶrper 14B. Das Positionierelement 54 ist um die Befestigungsschraube 18 herum angeordnet, vorzugsweise ohne die Befestigungsschraube 18 zu berĆ¼hren. Das Positionierelement 56 ist um die Befestigungsschraube 52 herum angeordnet, vorzugsweise ohne die Befestigungsschraube 52 zu berĆ¼hren.Positioning elements 54 and 56 are provided for positioning the bearing bodies 14A and 14B with respect to one another. The positioning elements 54, 56 position the first bearing body 14A relative to the second bearing body 14B in a plane perpendicular to the longitudinal axis of the fastening screw 18. The positioning elements 54, 56 are designed as dowel sleeves, but can also be designed, for example, as dowel pins. The positioning elements 54, 56 connect the first bearing body 14A to the second bearing body 14B in a form-fitting manner. The positioning element 54 is arranged around the fastening screw 18, preferably without touching the fastening screw 18. The positioning element 56 is arranged around the fastening screw 52, preferably without touching the fastening screw 52.

Die Vorrichtung 110 von Figur 2 ist ein AusfĆ¼hrungsbeispiel, bei dem keine Positionierelemente zur Positionierung des ersten und zweiten Lagerkƶrpers 14A, 14B relativ zum Zylinderkopf 16 (Befestigungsrahmen 30) vorgesehen sind. In Weiterbildungen dieses AusfĆ¼hrungsbeispiels kƶnnten Positionierelemente zwischen dem zweiten Lagerkƶrper 14B und dem Zylinderkopf 16 (Befestigungsrahmen 30) vorgesehen sein.The device 110 of Figure 2 is an embodiment in which no positioning elements for positioning the first and second bearing bodies 14A, 14B relative to the cylinder head 16 (mounting frame 30) are provided. In further developments of this exemplary embodiment, positioning elements could be provided between the second bearing body 14B and the cylinder head 16 (fastening frame 30).

Die Erfindung ist nicht auf die vorstehend beschriebenen bevorzugten AusfĆ¼hrungsbeispiele beschrƤnkt.The invention is not restricted to the preferred exemplary embodiments described above.

BezugszeichenlisteList of reference symbols

10, 11010, 110
Vorrichtung zum drehbaren Lagern einer NockenwelleDevice for the rotatable mounting of a camshaft
1212th
Nockenwellecamshaft
1414th
LagerkƶrperBearing body
14A14A
Erster LagerkƶrperFirst bearing body
14B14B
Zweiter LagerkƶrperSecond bearing body
1616
ZylinderkopfCylinder head
1818th
Befestigungsschraube (Befestigungsmittel)Fastening screw
18A18A
SchraubenkopfScrew head
2020th
KipphebelachseRocker arm axis
20A20A
AnlageflƤcheContact surface
2121
Aufnahmeadmission
2222nd
Aufnahmeadmission
22A22A
Aufnahme im ersten LagerkƶrperRecording in the first bearing body
22B22B
Aufnahme im zweiten LagerkƶrperRecording in the second bearing body
2424
DurchgangslochThrough hole
24A24A
Durchgangsloch im ersten LagerkƶrperThrough hole in the first bearing body
24B24B
Durchgangsloch im zweiten LagerkƶrperThrough hole in the second bearing body
2626th
SacklochBlind hole
2727
Gussbutzen (Gussvorsprung)Casting slug (casting projection)
2828
FluidkanalFluid channel
2929
AuflageflƤcheSupport surface
3030th
BefestigungsrahmenMounting frame
3232
DurchgangslochThrough hole
3434
LƤngskanalLongitudinal channel
3636
StichkanalBranch channel
3838
StichkanalBranch channel
4040
PasshĆ¼lse (Positionierelement)Adapter sleeve (positioning element)
4242
Positionierstift (Positionierelement)Positioning pin (positioning element)
4444
AusnehmungRecess
4646
AusnehmungRecess
4848
AusnehmungRecess
5050
AusnehmungRecess
5252
BefestigungsschraubeFastening screw
5454
PasshĆ¼lse (Positionierelement)Adapter sleeve (positioning element)
5656
PasshĆ¼lse (Positionierelement)Adapter sleeve (positioning element)
5858
DurchgangslochThrough hole
6060
SacklochBlind hole
AA.
Gussbutzenfreier (gussvorsprungfreier) BereichSlug-free (casting protrusion-free) area

Claims (14)

  1. Device (10; 110) for rotatable mounting of a camshaft (12) of an internal combustion engine, comprising:
    a first bearing body (14; 14A) with a receiver (22; 22A) for rotatable mounting of the camshaft (12);
    a cylinder head (16) or a fixing frame (30) for fixing the first bearing body (14; 14A); and
    a first fixing means (18) which fixes the first bearing body (14; 14A) to the cylinder head (16) or fixing frame (30), wherein the first fixing means (18) is the sole fixing means (18) which fixes the first bearing body (14; 14A) to the cylinder head (16) or fixing frame (30),
    characterized by:
    a rocker arm shaft (20) for rotatable mounting of a rocker arm, wherein the first fixing means (18) additionally fixes the rocker arm shaft (20) to the cylinder head (16) or fixing frame (30).
  2. Device (10; 110) according to Claim 1, wherein:
    the first fixing means (18) is a first fixing screw; and/or
    the first fixing means (18) fixes the first bearing body (14; 14A) to the cylinder head (16) or fixing frame (30) by force fit and form fit; and/or
    the first fixing means (18) is a releasable fixing means.
  3. Device (10) according to Claim 1 or Claim 2, wherein the first bearing body (14) forms a one-piece bearing block for mounting the camshaft (12).
  4. Device (110) according to Claim 1 or Claim 2, furthermore comprising a second bearing body (14B) with a receiver (22B) for mounting the camshaft (12), wherein:
    the first bearing body (14A) and the second bearing body (14B) together form a two-piece bearing block; and
    the receiver (22A) of the first bearing body (14A) and the receiver (22B) of the second bearing body (14B) form a common receiver for the camshaft (12).
  5. Device (110) according to Claim 4, wherein:
    the first bearing body (14A) and the second bearing body (14B) are fixed together, preferably by force fit and form fit, via a second fixing means (52), in particular a second fixing screw.
  6. Device (110) according to Claim 4 or Claim 5, wherein:
    the first fixing means (18) also fixes the second bearing body (14B) to the cylinder head (16) or fixing frame (30).
  7. Device (110) according to any of Claims 4 to 6, furthermore comprising at least one positioning element (54, 56) which is arranged between the first bearing body (14A) and the second bearing body (14B) for positioning the first bearing body (14A) relative to the second bearing body (14B).
  8. Device (110) according to Claim 7, wherein the at least one positioning element (54, 56) arranged between the first bearing body (14A) and the second bearing body (14B) comprises a positioning dowel, an adapter sleeve surrounding the first fixing means (18) and/or an adapter sleeve surrounding the second fixing means (52) .
  9. Device (10) according to any of Claims 4 to 8, wherein:
    the device (10) furthermore comprises at least one positioning element (40, 42) which is arranged between the first bearing body (14) or the second bearing body (14B) on one side and the cylinder head (16) or the fixing frame (30) on the other, for positioning the first or second bearing body (14, 14B) relative to the cylinder head (16) or fixing frame (30); or
    the device (10) comprises no positioning element for positioning the first or second bearing body (14; 14B) relative to the cylinder head (16) or fixing frame (30) .
  10. Device (10) according to Claim 9, wherein the at least one positioning element (40, 42) arranged between the first or second bearing body (14; 14B) and the cylinder head (16) or the fixing frame (30) comprises a positioning dowel and/or an adapter sleeve which surrounds the first fixing means (18).
  11. Device (10; 110) according to any of the preceding claims, wherein:
    the first bearing body (14; 14A) has a receiver for the rocker arm shaft (20) which is arranged preferably on a side of the first bearing body (14; 14A) opposite the cylinder head (16) or fixing frame (30); and/or
    a longitudinal channel (34) of the rocker arm shaft (20) for lubricating fluid is fluidically connected to the receiver (22; 22A) for the camshaft (12) of the first bearing body (14; 14A), preferably via a branch channel (38) of the first bearing body (14; 14A) and a branch channel (36) of the rocker arm shaft (20).
  12. Device (10; 110) according to any of the preceding claims, wherein the fixing frame (30) or the cylinder head (16) has a hole (26), in particular a blind hole or a passage hole, with a thread for force-fit and form-fit fixing of the first bearing body (14; 14A) to the fixing frame (30) or cylinder head (16) by means of the first fixing means (18).
  13. Device (10; 110) according to any of the preceding claims, wherein:
    the first bearing body (14; 14A) is configured asymmetrically relative to a vertical plane through a central longitudinal axis of the receiver (22; 22A) for the camshaft (12); and/or
    the first fixing means (18) generates a tilting moment to support the first bearing body (14; 14A) on a contact face (29) of the cylinder head (16) or fixing frame (30).
  14. Motor vehicle, in particular utility vehicle, with a device (10; 110) according to any of the preceding claims.
EP18184901.9A 2017-08-18 2018-07-23 Device for rotatably supporting a camshaft Active EP3450706B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21157914.9A EP3842622B1 (en) 2017-08-18 2018-07-23 Device for rotatably supporting a camshaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017118862.2A DE102017118862A1 (en) 2017-08-18 2017-08-18 Device for rotatably supporting a camshaft

Related Child Applications (2)

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EP21157914.9A Division EP3842622B1 (en) 2017-08-18 2018-07-23 Device for rotatably supporting a camshaft
EP21157914.9A Division-Into EP3842622B1 (en) 2017-08-18 2018-07-23 Device for rotatably supporting a camshaft

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EP3450706A1 EP3450706A1 (en) 2019-03-06
EP3450706B1 true EP3450706B1 (en) 2021-03-31

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EP18184901.9A Active EP3450706B1 (en) 2017-08-18 2018-07-23 Device for rotatably supporting a camshaft
EP21157914.9A Active EP3842622B1 (en) 2017-08-18 2018-07-23 Device for rotatably supporting a camshaft

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US (1) US20190055897A1 (en)
EP (2) EP3450706B1 (en)
JP (1) JP7248391B2 (en)
CN (2) CN109404082B (en)
BR (1) BR102018016619B1 (en)
DE (1) DE102017118862A1 (en)

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CN111648835B (en) * 2020-06-22 2021-05-11 äøœé£Žå•†ē”Øč½¦ęœ‰é™å…¬åø Camshaft seat assembly and bearing seat assembly group

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Also Published As

Publication number Publication date
EP3842622A1 (en) 2021-06-30
BR102018016619A8 (en) 2023-02-14
EP3842622B1 (en) 2024-04-03
RU2018129776A (en) 2020-02-17
EP3450706A1 (en) 2019-03-06
JP2019035410A (en) 2019-03-07
CN109404082A (en) 2019-03-01
US20190055897A1 (en) 2019-02-21
CN109404082B (en) 2022-05-03
CN114856745A (en) 2022-08-05
DE102017118862A1 (en) 2019-02-21
BR102018016619A2 (en) 2019-07-16
RU2018129776A3 (en) 2021-12-27
BR102018016619B1 (en) 2023-10-03
JP7248391B2 (en) 2023-03-29

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