DE102016220830A1 - Rotor with formed by two plates Fluidleitkanal for a camshaft phaser and camshaft adjuster - Google Patents

Abstract

The invention relates to a rotor (1) for a camshaft adjuster (2) of an internal combustion engine of a motor vehicle with an annular body (3), in particular integrally formed and approximately cylindrical, on its outer side (4A) at least one radially projecting wing (5) to be displaced in a vane (15), wherein inside the ring body (3), a plurality of plates (6A, 6B, 6C, 6D, 12A, 12B, 12C) are axially stacked / stacked to form fluid guide channels (7A, 7B, 13A, 13B ) for supplying or discharging hydraulic fluid into the vane cell (15), each fluid conduit (7A, 7B, 13A, 13B) being a radially extending passage through each of two plates (6A, 6B, 6C, 12A, 12B, 12C ) is formed. Likewise, the invention relates to a camshaft adjuster (2) of the vane type with a rotor (1) according to the invention.

Description

The invention relates to a rotor for a camshaft adjuster an internal combustion engine of a motor vehicle with, for example, integrally formed approximately cylindrical annular body, on the outside of which at least one radially projecting wing is to be displaced in a wing cell, wherein inside the annular body a plurality of plates / rings / Discs / internal parts are axially superimposed / stacked / stacked to form Fluidleitkanäle for supplying hydraulic fluid into the vane. Likewise, the invention relates to a camshaft adjuster of the vane type with a rotor according to the invention.

In the US 2014/0373796 A1 a generic valve timing control apparatus (camshaft adjuster) is disclosed, which controls an opening timing and closing timing of an intake valve and / or an exhaust valve of an internal combustion engine, which is driven by a driven shaft of the internal combustion engine by changing a rotational phase between a drive-side shaft of the internal combustion engine and the driven shaft. The valve timing control apparatus includes a first housing, a second housing, a laminated body, and a resinous member. The first housing is integrally rotatable with one of the drive-side shaft and the driven shaft. The second housing is fixed to the first housing and forms a plurality of pressurizing spaces in cooperation with the first housing. The laminated body has a plurality of thin plates stacked successively in an axial direction. The laminate is integrally rotatable with the other of the drive-side shaft and the driven shaft, and is disposed at a corresponding location located between the first housing and the second housing. The resin member is made of a resin material. The laminate is insert molded into the resin component. The resin member has a plurality of vanes, a first sidewall, and a second sidewall. Each of the plurality of vanes extends in a radial direction to divide a corresponding space of the plurality of pressurizing spaces into a prestore chamber and a retard chamber. The first sidewall is disposed between the first housing and the laminate and is slidable relative to the first housing. The second side wall is disposed between the second housing and the laminated body and is slidable relative to the second housing.

Likewise is in the DE 10 2009 053 600 A1 , in the DE 10 2009 031 934 A1 , in the WO 2010/128976 A1 , in the DE 10 2008 028 640 A1 , in the DE 10 2011 117 856 A1 , in the EP 1 731 722 A1 , in the WO 2009/152987 A1 , in the DE 10 2013 226 449 A1 and in the US 2015/0144084 A1 discloses a rotor of a hydraulic camshaft adjuster.

A problem here is that previous rotors are divided into two parts / two-part or multi-part in the axial direction, which is why connecting pins are used or glued rotor halves or materially connected must be. Bonding in particular requires the use of hazardous substances during production. In addition, the cohesive connection is not robust enough, especially for a long period seen at high pressures, creating the risk of unwanted parting line and oil leakage. Likewise, due to the operating load, the rotor can open up / diverge and the hydraulic functionality can be disabled or a hydraulic short circuit can occur due to the gaping parting line. To the DE 10 2013 226 449 A1 It should be noted that the manufacture of the rotor main body with a cup shape is complicated and that radii can cause leaks and hydraulic short circuits. It can also lead to jamming of the locking piston at the cutting edge.

It is the object of the invention to overcome or at least mitigate the disadvantages of the prior art, and in particular to provide a rotor for a phaser, which minimizes a risk of leakage, allows easy low-cost production and a good and easy installation allows. It is also the object of the invention to provide a camshaft adjuster, which has a long service life and with which a safe actuation / (time) adjustment can be made, whereby the risk of leakage is minimized.

In a generic device, this object is achieved in that each Fluidleitkanal is formed as a radially extending channel by two plates and the task is in terms of the camshaft adjuster solved by the fact that this rotor according to the invention or in that an inventive Rotor is inserted / introduced.

In the rotor, the hydraulic fluid is either supplied to or removed from the vane cells through the fluid guide channels of the two plates in the radial direction. The radial Fluidleitkanäle can be formed in particular in that in the first of the two plates, a half-open channel is formed in the radial direction and this channel through the second adjacent plate, which in the axial direction The first plate is layered, sealed. Each two adjacent plates thus serve, as well as sections in the radial direction, as Fluidleitkanal by means of sealing the half-open channels.

Further, the individual plates / layers may have different properties and shapes to form the fluid conducting channels. In particular, the plates may have different thicknesses or dimensions in the axial direction and / or different materials. Due to the modular design, in particular, the ring body has a low density in order to be made cheap and easy to calibrate, while the plates preferably have a high density in order to achieve the required durability.

Advantageous embodiments are claimed in the subclaims and are explained below.

It is advantageous if the fluid channels extend exclusively in a radial plane, that is to say in a plane which is orthogonal to the rotor axis / axis of rotation. The hydraulic fluid is passed directly into or out of the vane without having to take the Fluidleitkanäle detours in the axial direction. This improves, inter alia, a distribution of the mass of the hydraulic medium and also causes a mass reduction, whereby an inertia of the rotor is optimized. It can also be ensured that the two partial pressure chambers have a balanced centrifugal force of the hydraulic medium when rotating about the longitudinal axis and thus no speed-dependent relative pressurization occurs.

It is also expedient if the plates are made of metal, for example as sheet metal plates or as sintered plates. A production of the plates / layer parts as sheet metal stamped parts / sheet metal plates brings production advantages. In contrast, in the case of a design as simple sintered components / sintered plates, the radial fluid guide channels can be punched through radially directly in the sintering press tool, so that a milling of fluid guide channels is dispensed with. The ring body is therefore particularly preferably made of sintered steel, whereas the plates are produced as sheet metal plates (or possibly also as sintered plates) or stamped parts (or formed parts or sintered steel parts).

It is advantageous if the plates have different materials, in particular metal and plastic, in order to be combined with one another and to achieve a high sealing effect of the plates with respect to the hydraulic medium.

Preferably, at least the two axially outermost plates are formed and / or geometrically formed and / or arranged such that the plates lying therebetween are prestressed. The two outer plates are seen in particular concave in the axial direction, similar to a disk with a central opening or a plate spring, so that in the plates when joining, plate spring-like, respectively their radially outer region relative to the radially inner region in the axial direction / axial / be elastically deformed in the longitudinal axis direction of the rotor. Such a (insertion) of the plates in the annular body has the consequence that the plate deformed elastically in the axial direction and also reduces the outer diameter of the plate, since the inner diameter of the annular body is smaller than the outer diameter of the axially concave plate , After joining, the plate prestressed in this way presses radially outward against the radially inner side of the annular body or expands radially, so that the plate is anchored / fixed by frictional engagement. An additionally trained positive connection and / or material connection can naturally further support this anchoring. The connected to the annular body plates bias in this embodiment, the plates lying between them.

It is advantageous if there is a force and / or form and / or material connection between the plates in turn and / or the plates and the ring body. The plates or the ring body can be connected to each other, for example, by laser welding, Toxen or longitudinal or transverse compression bandage, shrink or shrink adhesive bandage. The different types of connection force, form and material connection can of course be combined with each other as desired. The frictional connection can be additionally reinforced, in particular by friction-increasing measures such as a laser structure, a surface pattern with raised pattern / depression pattern, knurling, heat treatment (eg hardening, steam treatment) or coating in a press fit. A possible connection technique for positive engagement is in particular a kind of sandwich principle, in which the plates are rolled axially into the annular body and opposite radial projections / recesses are formed on the plates and on the radial inner side of the annular body. It is also possible that a positive connection / a positive connection is achieved by a local plastic deformation of the annular body together with inserted plates radially inward. A possible adhesion can represent a longitudinal compression bandage or a screw in the ring body. For example, the axial deformations of the concave plates to each other, similar to a diaphragm spring deformation in the plate spring package, can be achieved by the longitudinal compression bandage. The material bond can preferably be produced by laser, resistance or friction welding or alternatively by sintering at the joints after the joining process of the Plates in the ring body. The individual plates may in particular have a different dimension in the axial direction and have different material.

The radial thickness of the annular body with the fixedly connected rotor blades / wings can in particular be approximately 1 to 4 mm, preferably 3 mm, so that leakage at the axial bearing can be effectively prevented.

It when the ring body is made in one piece as a sintered part with wings and has a smooth radial inside is particularly advantageous.

The plates are preferably formed so that they can be used for a camshaft centering in the rotor. For this purpose, they preferably have on their radial inner side a corresponding surface extending in the axial direction with a high surface quality. The camshaft can thus be centered as needed on the radially inner surface of the plates. These can also be a timing pin molded or a hole for a timing pin to be punched.

In a wing of the ring member preferably a hydraulically operated spring-biased locking pin is integrated, which is movable parallel to the longitudinal axis direction and can lock a rotational movement of the rotor relative to the stator in at least one position.

In addition, the invention relates to a camshaft adjuster of the vane type with a rotor according to the invention. By inserting this rotor effectively a leakage can be avoided and the production and assembly can be further improved.

In other words, the invention relates to a rotor for a hydraulic variable camshaft timing (HVCT) with an outer ring with blades / blades and a composite interior, by stacked / laminated metal plates or sintered plates. These plates are axially joined in the ring body and connected to him radially by form and / or force and / or material connection. The rotor is thus composed of one, preferably seen in the radial direction about 3 mm thick, annular body with fixed rotor blades and a plurality of disc-like inner parts / plates axially layered in the annular body and by the axial (elastic) deformation and the biasing force in the ring body be spread and thus anchored radially. A risk of gaping of the wing tips under operating load is minimized and a separation of the locking and pin holes is avoided. The sealing bar is manufactured directly in the inner part.

The invention also relates to a stator that can be configured in a special way. The stator for a camshaft adjuster of an internal combustion engine of a motor vehicle preferably has a sprocket ring element and a vane contour specification member which is concentrically and within the sprocket ring member connected thereto, wherein the vane contour specification member is composed of a plurality of circumferentially successively arranged pressure chamber segments. Next, the pressure chamber segments are preferably designed identical. In particular, the pressure chamber segments lie against one another in such a way that they determine a closed contour of the vane contour specification component. In particular, such a stator can be used in said camshaft adjuster.

• 1 in Form einer Explosionszeichnung eine perspektivische Ansicht eines Rotors einer ersten bevorzugten Ausführungsform mit einem Ringkörper und vier korrespondierenden Platten,
• 2 eine perspektivische Ansicht der Rückseite eines bevorzugten Ringkörpers,
• 3 eine perspektivische Ansicht der Vorderseite des bevorzugten Ringkörpers aus 2,
• 4 eine perspektivische Vorderansicht des Rotors der ersten bevorzugten Ausführungsform im montierten Zustand mit Ringkörper und Platten,
• 5 eine perspektivische Rückansicht des montierten Rotors der ersten bevorzugten Ausführungsform aus 4,
• 6 in Form einer Explosionszeichnung eine perspektivische Ansicht eines Rotors einer weiteren / zweiten bevorzugten Ausführungsform mit einem Ringkörper und fünf korrespondierenden Platten,
• 7 eine Schnittansicht einer bevorzugten Ausführungsform eines Nockenwellenverstellers mit eingesetztem zusammengebauten Rotor der zweiten Ausführungsform,
• 8 eine perspektivische Ansicht einer weiteren bevorzugten Ausführungsform eines Nockenwellenverstellers mit dem eingesetzten Rotor der ersten bevorzugten Ausführungsform und
• 9 eine perspektivische Ansicht des Nockenwellenverstellers aus 8 mit einem aufgesetztem Dichtungsdeckel und einer Spiralfeder.

The present invention will be explained in more detail below with reference to preferred embodiments with reference to the accompanying figures. Show it:

• 1 in the form of an exploded view, a perspective view of a rotor of a first preferred embodiment with a ring body and four corresponding plates,
• 2 a perspective view of the back of a preferred ring body,
• 3 a perspective view of the front of the preferred ring body 2 .
• 4 a front perspective view of the rotor of the first preferred embodiment in the assembled state with annular body and plates,
• 5 a rear perspective view of the mounted rotor of the first preferred embodiment 4 .
• 6 in the form of an exploded view, a perspective view of a rotor of a further / second preferred embodiment with an annular body and five corresponding plates,
• 7 a sectional view of a preferred embodiment of a camshaft adjuster with inserted assembled rotor of the second embodiment,
• 8th a perspective view of another preferred embodiment of a camshaft adjuster with the rotor used of the first preferred embodiment and
• 9 a perspective view of the camshaft adjuster from 8th with an attached seal cover and a spiral spring.

The figures are schematic in nature and are intended only to aid understanding of the invention. Identical elements are provided with the same reference numerals. The features of the various embodiments can be interchanged.

1 shows a rotor according to the invention 1 a first preferred embodiment for a phaser 2 (please refer 8th ), which can be used for an internal combustion engine of a motor vehicle, wherein the individual components are shown for the better understanding in an exploded view and pulled apart in the axial direction. An integrally formed cylindrical annular body 3 has at its radial outer sides / outer surfaces 4A four radially outwardly projecting wings 5 on which symmetrical to each other at an angle of 90 ° to the next wing 5 are arranged about a longitudinal axis A. These wings are used to divide the respective vane / chamber into two sub-chambers in a camshaft adjuster 2 (please refer 8th ). A hydraulic system can apply torque to the rotor 1 be exerted against a stator, whereby the rotor 1 in the camshaft adjuster 2 rotates / rotates and thus implements a camshaft adjustment. The ring body 3 is in this embodiment as a sintered part with fixed wings 5 and a smooth radially inner surface 4B produced, which represents a simple and inexpensive production / manufacturing variant.

Inside the ring body 3 or in the inner volume of the cylindrical base body of the annular body 3 become four different plates 6A . 6B . 6C and 6D perpendicular to the longitudinal axis A of the rotor 1 or ring body 3 and axially superimposed / layered to be in the assembled state (see 4 ) two different Fluidleitkanäle 7A and 7B each with four channels for supplying and discharging hydraulic fluid or for forming a radially extending fluid connection in a sub-chamber of the vane 15 (please refer 8th ).

Each of the eight fluid channels 7A . 7B is as a channel running in the radial direction through two plates 6A and 6B such as 6B and 6C formed. The plate 6A along with the plate 6B Form the four first Fluidleitkanäle 7A whereas, on the other hand, the plates 6B and 6C the four second fluid channels 7B molding (see assembled state in 4 ). The plate 6A has four half-open channels 8th on, which are each arranged in the plane perpendicular to the longitudinal axis A at right angles to each other and extending radially from the longitudinal axis A. The adjacent, in the assembled state on the plate 6A fitting plate 6B seals the half-open channels 8th and thereby forms the four closed in the axial direction Fluidleitkanäle first 7A out.

The annular disc-shaped plates 6A . 6B . 6C and 6D are made of sintered steel. Alternatively, for one or more plates 6A . 6B . 6C . 6D also plastic can be used as material.

The third plate 6C points as well as the plate 6A , four radially extending, half-open channels 8th on which are arranged at right angles to each other about the longitudinal axis A. The half-open gutters are at the second plate 6B facing side of the third plate 6C educated. In the assembled state (see 4 ) these gullies become 8th again through the second plate 6B sealed. Seen in the axial direction arise with the radially extending Fluidleitkanälen 7A . 7B two planes perpendicular to the longitudinal axis A, to establish a fluid connection for the hydraulic fluid. The annular disc-shaped fourth plate 6D has an opening with a larger inner diameter and is on the third plate 6C arranged axially adjacent.

All four plates 6A . 6B . 6C and 6D each have three parallel to the longitudinal axis A extending bores 9 at the same position on the four plates 6A . 6B . 6C and 6D with three connecting pins 10 in a layered state rotationally and axially fixed to each other and so a certain orientation of Fluidleitkanäle 7A . 7B define. In addition, the connecting pins serve 10 in the assembled state in the camshaft adjuster 2 a stop limit and a hooking possibility for a particular spring (see 9 ).

2 and 3 show the ring body 3 of the rotor 1 , in which 2 the front of the ring body 3 and 3 the back of the ring body 3 demonstrate. The in the radial direction 3mm thick cylindrical ring body 3 has four radially outwardly projecting and integral with the ring body 3 trained wings 5 which are arranged substantially at right angles to each other in a plane perpendicular to the longitudinal axis A. Two wings each 5 are facing each other. From the four wings 5 are two opposite wings 5 Equally constructed and symmetrical with respect to a plane which is centered by the two wings 5 runs. The other two opposite wings 5 are individually shaped taking in a wing 5 a recess for a locking pin is inserted and in the opposite wing a through hole parallel to the longitudinal axis A. On both sides of each wing 5 Seen in the circumferential direction each runs a fluid supply 11 in the form of bores in the radial direction, which the hydraulic fluid via the Fluidleitkanäle 7A . 7B in the wing cells 15 (please refer 8th ). at every wing 5 is in each case one of the two adjacent fluid feeds 11 in the axial direction or in the direction of the longitudinal axis A relative to the other fluid supply 11 on the other side of each wing 5 postponed. The fluid feeds 11 on each side of the wing 5 form the fluid feeds 11 in a first plane perpendicular to the longitudinal axis A and the fluid feeds 11 the opposite side of the wing 5 in the circumferential direction form the fluid feeds 11 the second plane perpendicular to the longitudinal axis A. In the assembled state with the inserted plates 6A . 6B . 6C and 6B the fluid conduits interact 7A with the fluid feeds 11 the first level and the Fluidleitkanäle 7B with the fluid feeds 11 the second plane orthogonal to the longitudinal axis A, since these fluid supplies 11 each fluidically connected or operatively connected in extension (see 1 and 4 ).

The four wings 5 extend radially outward in the circumferential direction to increase in width, so that the close to the wings 5 adjacent fluid feeds 11 the vane cells 15 of the camshaft adjuster 2 can supply the hydraulic fluid in all turning positions / rotational positions (see 8th ). Similarly, in the stator tight-fitting, radial outer surfaces of the wings 5 larger, which further minimizes leakage during operation.

4 shows the assembled / assembled rotor according to the invention 1 in the rear view, with the four plates 6A . 6B . 6C and 6D axially stacked together and in the interior of the annular body 3 inserted or joined. Here are the four plates 6A . 6B . 6C . 6D in the axial direction (slightly) elastically deformed, more precisely, the radial outer side is elastically displaced in the axial direction relative to the radial inner side and thus biased into the annular body 3 been inserted that the plates 6A . 6B . 6C . 6D in the ring body 3 Afterwards, spread radially against the inside 4B of the bovine body 3 Press and so strong in the ring body 3 anchored (longitudinal compression bandage). The frictional connection between the ring body 3 and the four plates 6A to 6D is due to a radially outside surface structure of the four plates 6A to 6D strengthened. Optionally, another hole can be made for a timing pin.

5 shows the rotor 1 out 4 in a front view, the four fluid feeds 11 the first level together with the first Fluidleitkanälen 7A lie in a common plane and a radial extension of the fluid supply 11 represent the first level. About a camshaft, not shown, which through the four plates 6A to 6D Also centered, via specially embedded channels, a hydraulic connection via the Fluidleitkanäle 7A and the fluid supplies 11 the first level in a sub-chamber and via the Fluidleitkanäle 7B and the fluid supplies 11 the second level into the other sub-chamber of each vane 15 getting produced. About a pressure build-up either in one or in the other sub-chamber of the fluid cell 15 can the camshaft adjuster 2 aktuieren.

6 shows a further preferred embodiment of the rotor according to the invention 1 for a camshaft adjuster 2 (please refer 7 ). In this variant are five plates 12A . 12B . 12C designed as sheet metal stampings and shaped and bent accordingly. The ring body 3 has remained the same compared to the first preferred embodiment and adopted by this. In this embodiment, only three different sheet metal plates 12A . 12B . 12C used, with the sheet metal plate 12A with the metal plate 12B four first fluid channels 13A form, which extend radially outward. From a certain radius, these fluid channels open 13A in the circumferential direction, so that at this point the metal plate 12B together with the metal plate 12C forms a further, circumferential in the radial direction channel to the fluid feeds 11 supply or remove hydraulic fluid from the first level. The same applies to the second fluid channels 13B together with the metal plates 12C and 12B and continue with the metal plates 12B and 12A and the fluid feeds 11 in the second level.

7 shows in a sectional view a side view of the assembled rotor 1 out 6 , The rotor 1 is in a stator 14 of the camshaft adjuster 2 assembled. The two axially outer metal plates 12A are, as in a diaphragm spring, deformed in the axial direction or elastically deflected and in the assembled state in the annular body 3 spread. The three metal plates 12B and 12C Be over the two axially outermost metal plates 12A non-positively with the ring body 3 anchored in the radial direction.

8th shows the camshaft adjuster according to the invention 2 with the rotor according to the invention 1 the first preferred embodiment, in a stator 14 is used. The four vane cells 15 be through the four wings 5 each divided into two sub-chambers, each of the sub-chambers either via the fluid feeds 11 the first level with the first Fluidleitkanälen 7A or via the fluid feeds 11 the second level with the Fluidleitkanälen 7B fluidly connected. By controlling the hydraulic pressure of the first sub-chamber with respect to the second sub-chamber so can a torque on the rotor 1 be exercised, causing the rotor 1 opposite the stator 14 rotates about the longitudinal axis A and thus implemented a camshaft adjustment.

9 shows the camshaft adjuster 2 with the rotor 1 the first preferred embodiment and the stator 14 with encircling sprocket ring element, being on the stator 14 a flat, disc-shaped seal cover / lid 16 is mounted perpendicular to the longitudinal axis A, which has an opening about the longitudinal axis A and the sub-chambers of the vane 15 seals in the axial direction and also serves as a stop. At one of the three connecting pins 10 of the rotor 1 positively engages a coil spring 17 one, the other end of the coil spring 17 on the seal cover 16 is positively connected, so that the stator 14 opposite the rotor 1 is resiliently biased about the longitudinal axis A and a torque applied to the longitudinal axis A.

LIST OF REFERENCE NUMBERS

1

rotor

2

Phaser

3

ring body

4A

outer surface

4B

palm

5

wing

6A

first plate

6B

second plate

6C

third plate

6D

fourth plate

7A

first Fluidleitkanal

7B

second fluid conduit

8th

gutter

9

drilling

10

connecting pin

11

fluid supply

12A

first sheet metal plate

12B

second sheet metal plate

12C

third sheet metal plate

13A

first Fluidleitkanal

13B

second fluid conduit

14

stator

15

vane

16

seal cover

17

spiral spring

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 2014/0373796 A1 [0002]
• DE 102009053600 A1 [0003]
• DE 102009031934 A1 [0003]
• WO 2010/128976 A1 [0003]
• DE 102008028640 A1 [0003]
• DE 102011117856 A1 [0003]
• EP 1731722 A1 [0003]
• WO 2009/152987 A1 [0003]
• DE 102013226449 A1 [0003, 0004]
• US 2015/0144084 A1 [0003]

Claims (4)

Rotor (1) for a camshaft adjuster (2) of an internal combustion engine of a motor vehicle having an annular body (3), on the outside (4A) of which there is at least one radially projecting wing (5) to be displaced in a winged cell (15) Annular body (3) a plurality of plates (6A, 6B, 6C, 6D, 12A, 12B, 12C) are arranged axially one above the other to Fluidleitkanäle (7A, 7B, 13A, 13B) for supplying or discharging hydraulic fluid in the vane cell (15 ), characterized in that each fluid guide channel (7A, 7B, 13A, 13B) is formed as a radially extending channel by two plates (6A, 6B, 6C, 12A, 12B, 12C) respectively. Rotor (1) to Claim 1 , characterized in that the fluid channels (7A, 7B, 13A, 13B) extend exclusively in a radial plane. Rotor (1) to Claim 1 or 2 , characterized in that the plates (6A, 6B, 6C, 6D, 12A, 12B, 12C) are made of metal. Camshaft adjuster (2) of the vane type with a rotor (1) according to one of the preceding claims.

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