DE102017127735B4 - Hydraulic camshaft adjuster with a sealing part consisting of two separate components - Google Patents

Abstract

Hydraulic camshaft adjuster (10), comprising a stator (20) which can be driven by a crankshaft of an internal combustion engine (35) and a rotor (25) which can be coupled to a camshaft (40) of the internal combustion engine (35), the rotor (25) being rotatable around a camshaft rotational axis (30) of the camshaft (40) relative to the stator (20), - wherein the stator (20) comprises a sealing part (60), - wherein the sealing part (60) has a flange portion extending in a plane of rotation relative to the camshaft rotational axis (30) (100) and an axially extending collar portion (105) connected to the flange portion (100), wherein the collar portion (105) is disposed axially on a side of the flange portion (100) facing away from the rotor (25) and connected to the flange portion (100) is connected, - wherein the stator (20) comprises a sealing disc (65), - wherein the sealing disc (65) is arranged axially between the rotor (25) and the collar portion (105) on the flange portion (100), - the sealing disk (65) engages in a radially outer first section (135) in the flange section (100) of the sealing part (60) and is connected in a torque-locking manner to the sealing part (60), wherein a second inner side arranged radially to the first section (135) Section (140) of the sealing disc (65) protrudes radially inwardly beyond the collar portion (105), - characterized in that the sealing part (60) on one of the rotor (25) facing first end face (117) has a first recess (120) a recess base (130), - the recess base (130) in the direction of the collar portion (105) offset from the rotor (25) arranged and the first recess (120) on a side facing the rotor (25) is open, wherein in first recess (120), the sealing disc (65) is arranged at least in sections and with a collar portion (105) facing the second end face (145) on the recess bottom (130).

Description

The invention relates to a hydraulic camshaft adjuster according to the preamble of patent claim 1.

From the WO 2014/048 588 A1 is known a camshaft adjuster. The camshaft adjuster has a stator which can be driven by a crankshaft of an internal combustion engine and a rotor which can be connected in a rotationally fixed manner to a camshaft of the internal combustion engine. The stator has a stator disk and a stator ring, wherein the stator ring is connected to the stator disk by means of screws. A seal of the screws is expensive.

The DE 10 2013 212 943 A1 shows a camshaft adjusting system with a camshaft phaser of the vane type, in which a pressure fluid distributing central valve is present, and with a Verstellaktuator acting on the central valve, the pressure fluid distribution, wherein the camshaft adjuster is driven or driven by means of a dry-running traction drive, wherein the Verstellaktuator on a Joint is attached or attachable to a component of the camshaft adjuster via a coupling element wherein the coupling element is configured and arranged, and / or the joint is formed so that wobble in the radial direction of the camshaft adjuster from the combustion engine housing fixed component decouples are, wherein a statorfestes cover member in the form of a cavity enclosing the spring cover configured to receive a return spring and is arranged.

The DE 10 2015 113 615 A1 FIG. 12 shows a valve timing adjusting system including: valve timing adjusting means integrally rotatable with a drive shaft of an internal combustion engine or a driven shaft to be driven by the drive shaft, wherein the valve timing adjusting means transmits torque from the drive shaft to the driven shaft and a relative rotational phase between the drive shaft and the driven shaft changes to adjust an opening and closing timing of a valve that is driven to be opened and closed by the driven shaft; a solenoid disposed in an axial direction of an axis of rotation of the valve timing adjusting means on one side of the valve timing adjusting means and the valve timing adjusting means, the solenoid controlling an operation of driving the valve timing adjusting means; and a solenoid cover configured in a tubular shape and surrounding a radially outer side of the solenoid, the solenoid cover extending toward the valve timing adjusting means and to a radially inner side surface or a radially outer side surface of the valve timing adjusting means slidably fitted.

The DE 10 2015 214 725 A1 discloses an internal combustion engine having a motor housing, a valvetrain including a camshaft, a phaser operatively connected to the camshaft, and an actuator for actuating the phaser, the phaser and the actuator defining an interior, and a cover surrounding the phaser, and one of The cover surrounded actuator holder for attaching the actuator to the motor housing, wherein the interior is sealed by a disposed between the phaser and the actuator holder sealing member against a liquid outlet.

It is an object of the invention to provide an improved hydraulic phaser.

This object is achieved by means of a hydraulic camshaft adjuster according to claim 1. Advantageous embodiments are given in the dependent claims.

It has been appreciated that an improved hydraulic phaser may be provided in that the hydraulic phaser comprises a stator drivable by a crankshaft of an internal combustion engine and a rotor coupleable to a camshaft of the internal combustion engine, the rotor being rotatable about a camshaft rotational axis of the camshaft relative to the stator is, wherein the stator comprises a sealing part, wherein the sealing part comprises a rotational plane to the camshaft rotational axis extending flange portion and connected to the flange portion extending in the axial direction collar portion, wherein the collar portion disposed axially on a side facing away from the rotor of the flange and with the Flange portion is connected, wherein the stator comprises a sealing disc, wherein the sealing disc is arranged axially between the rotor and the collar portion on the flange portion, wherein the sealing disc on a engages radially outer first portion in the flange portion of the sealing member and is torque-lockingly connected to the sealing member, wherein a radially inner side to the first portion arranged second portion of the sealing disc protrudes radially inwardly beyond the collar portion.

This embodiment has the advantage that the sealing part is not in one piece, but consists of two separate components, each separately Forming process can be produced. As a result, it is possible to dispense with machining of the sealing part, since the geometry of the sealing part is determined overall by the fastening of the sealing disc to the sealing part. As a result, the hydraulic camshaft adjuster overall can be made particularly simple and inexpensive.

According to the invention, the sealing part has a first recess with a recess bottom on a first end face facing the rotor. The recess base is arranged offset in the direction of the collar portion of the rotor. The first recess is open on a side facing the rotor. In the first recess, the sealing disc is arranged at least in sections and is located with a collar portion facing the second end face on the recess bottom. As a result, the hydraulic camshaft adjuster can be made particularly compact in the axial direction.

In a further embodiment, the first recess has a first recess side surface and the sealing disk has an outer peripheral side, wherein the first recess side surface delimits the first recess in the radial direction. The sealing washer is pressed into the first recess and abuts on an outer peripheral side of the sealing washer on the first recess side surface and forms a press fit to form the connection. As a result, the sealing washer and the sealing part can be non-positively connected to each other.

In a further embodiment, the first recess and the collar portion are at least partially arranged radially overlapping. Alternatively, the first recess side surface is disposed radially outward of the collar portion. As a result, the sealing part can be formed particularly easily.

In a further embodiment, the hydraulic camshaft adjuster comprises a locking device. The locking device is connected to the rotor and has a movable between an unlocked position and a locking position in the axial direction locking means. In the sealing disk, a second recess is arranged at least in sections on a second end face facing the rotor. The second recess is formed axially open in the direction of the rotor. In the locking position, the locking means engages in the second recess to prevent rotation of the rotor relative to the stator. In the unlocked position, the rotor is rotatable relative to the stator about the camshaft rotational axis. In the unlocked position, the locking means is arranged outside the second recess. The recess can be particularly easily and inexpensively introduced into the recess by the arrangement in the sealing disc by a stamping process, so that the sealing disc can be produced without further machining.

In another embodiment, the hydraulic phaser adjusts a liner ring. The insert ring is arranged in the second recess.

The insert ring abuts with an outer circumferential side on a second recess side surface of the second recess and preferably forms a further interference fit with the second recess side surface. As a result, the insert ring is reliably positioned and secured against loss within the hydraulic camshaft adjuster. The locking means engages in the locking ring in the locking ring, wherein the insert ring at least on an inner peripheral side has a greater surface hardness than the second recess side surface. As a result, wear of the stator in the region of the engagement of the locking means can be kept low and at the same time the hydraulic camshaft adjuster are made particularly simple. The higher surface hardness of the insert ring on the inner peripheral side can be achieved, for example, by means of a surface hardening method, in particular by means of an induction hardening method.

In a further embodiment, the hydraulic camshaft adjuster has a rotatably arranged housing with a housing interior bounded by the housing and a sealing element, in particular a radial shaft sealing ring, wherein the stator is arranged at least in sections in the housing interior, wherein the sealing element is arranged radially between the housing and the collar section is arranged and rests on an outer peripheral side of the collar portion or on an inner peripheral side of the collar portion. As a result, reliable sealing of a fluid space arranged radially on the inside of the collar section can be ensured.

In a further embodiment, the hydraulic camshaft adjuster comprises an intermediate disc, wherein the intermediate disc extends in a further plane of rotation to the camshaft rotational axis, wherein the intermediate disc is arranged axially between the flange portion of the sealing part and the sealing disc.
In the flange portion is provided in the axial direction to the sealing disc and radially inwardly open receptacle.
The receptacle has a receiving reason, wherein the receiving reason to which the sealing disc on abuts the flange portion, is arranged parallel to an end face of the flange portion. The intermediate disc engages with a radially outer third portion arranged in the receptacle, wherein a radially inwardly disposed to the third portion fourth portion of the intermediate disc is arranged outside of the receptacle. The fourth section protrudes beyond the collar section radially inward.

In a further embodiment, the sealing disc is produced from a substantially planar raw material by means of a stamping method. The sealing disc has at least one of the following materials: aluminum, plastic, sheet metal, steel, sheet steel, aluminum sheet.

Advantageously, the sealing part is produced by means of a forming process, in particular a punch-bending process or a deep-drawing process. Advantageously, the sealing part has at least one of the following further materials: steel, aluminum, in particular sheet steel or aluminum sheet.

• 1 einen Längsschnitt durch einen hydraulischen Nockenwellenversteller gemäß einer ersten Ausführungsform;
• 2 einen in 1 mittels einer Markierung X markierten Ausschnitt des in 1 gezeigten Längsschnitts durch den hydraulischen Nockenwellenversteller;
• 3 eine perspektivische Darstellung einer Dichtscheibe des in den 1 und 2 gezeigten hydraulischen Nockenwellenverstellers aus einer ersten Perspektive;
• 4 eine perspektivische Darstellung der in den 1 bis 3 gezeigten Dichtscheibe aus einer zweiten Perspektive;
• 5 eine perspektivische Darstellung der in den 1 bis 4 gezeigten Dichtscheibe und eines Dichtteils des hydraulischen Nockenwellenverstellers in montiertem Zustand;
• 6 einen in 1 mittels einer Markierung Y markierten Ausschnitt des in
• 1 gezeigten Längsschnitts durch den hydraulischen Nockenwellenversteller;
• 7 einen Längsschnitt durch einen hydraulischen Nockenwellenversteller gemäß einer zweiten Ausführungsform;
• 8 eine perspektivische Darstellung einer Dichtscheibe des in 7 gezeigten hydraulischen Nockenwellenverstellers;
• 9 eine perspektivische Darstellung eines Dichtteils des in 7 gezeigten hydraulischen Nockenwellenverstellers;
• 10 eine perspektivische Darstellung des Dichtteils mit montierter Dichtscheibe und einem Einlegering;
• 11 einen Längsschnitt durch einen Stator eines hydraulischen Nockenwellenverstellers gemäß einer dritten Ausführungsform; und
• 12 einen in 11 mittels einer Markierung Z markierten Ausschnitt des in 11 gezeigten Längsschnitts durch eine Weiterbildung des in 11 gezeigten hydraulischen Nockenwellenverstellers.

The invention will be explained in more detail with reference to figures. Showing:

• 1 a longitudinal section through a hydraulic phaser according to a first embodiment;
• 2 one in 1 by means of a marker X marked section of the in 1 shown longitudinal section through the hydraulic camshaft adjuster;
• 3 a perspective view of a sealing disc of the in the 1 and 2 shown hydraulic camshaft adjuster from a first perspective;
• 4 a perspective view of the in the 1 to 3 shown sealing washer from a second perspective;
• 5 a perspective view of the in the 1 to 4 shown sealing washer and a sealing part of the hydraulic camshaft adjuster in the assembled state;
• 6 one in 1 by means of a marker Y marked section of the in
• 1 shown longitudinal section through the hydraulic camshaft adjuster;
• 7 a longitudinal section through a hydraulic camshaft adjuster according to a second embodiment;
• 8th a perspective view of a sealing disc of in 7 shown hydraulic camshaft adjuster;
• 9 a perspective view of a sealing part of in 7 shown hydraulic camshaft adjuster;
• 10 a perspective view of the sealing member with mounted sealing washer and a liner ring;
• 11 a longitudinal section through a stator of a hydraulic camshaft adjuster according to a third embodiment; and
• 12 one in 11 by means of a marker Z marked section of the in 11 shown longitudinal section through a development of in 11 shown hydraulic camshaft adjuster.

1 shows a longitudinal section through a hydraulic camshaft adjuster 10 according to a first embodiment.

The hydraulic camshaft adjuster 10 has a housing 15 , a stator 20 and one relative to the stator 20 rotatable rotor 25 on. The rotor 25 and the stator 20 are rotatable about a camshaft rotational axis 30 storable. The rotor 25 is in the assembled state of the hydraulic camshaft adjuster 10 on an internal combustion engine 35 with a camshaft 40 the internal combustion engine 35 connected.

The camshaft 40 rotates during operation of the internal combustion engine 35 around the camshaft rotation axis 30 , The camshaft 40 can be part of a valve train of the internal combustion engine 35 and serves to actuate individual valves at a specified time, in particular to open or close. The rotor 25 is non-rotatable with the camshaft 40 connected.

The stator 20 is in the assembled state of the hydraulic camshaft adjuster 10 on the internal combustion engine 35 with a crankshaft (in 1 not shown) torque-connected. The coupling of the stator 20 with the crankshaft, for example, by means of a belt 45 , in particular a toothed belt, take place. Alternative to the belt 45 A timing chain would also be conceivable. By means of the belt 45 is a torque from the crankshaft to the stator 20 transfer. The rotor 25 is relative to the stator 20 rotatable. The rotor limit 25 and the stator 20 at least two in 1 schematically indicated by dashed lines pressure chambers 50 , The pressure chambers 50 are with a pressurized fluid 55 fillable. The pressurized fluid 55 is preferably a liquid, preferably an oil, in particular an oil for lubricating components of the internal combustion engine 35 , The pressurized fluid 55 can by means of a central valve 56 to be controlled. The central valve 56 is through the rotor 25 and the camshaft 40 surrounded on the periphery. Depending on a differential pressure of the pressure fluid in the pressure chambers 50 becomes a rotation of the rotor 25 relative to the stator 20 causes. As a result, the camshaft 40 through the hydraulic camshaft adjuster 10 is rotated relative to the crankshaft and in dependence of the rotation of the valves of the valve train of the internal combustion engine 35 at a different time than before adjustment of the camshaft 40 be operated.

The stator 20 indicates the limitation of the pressure chamber 50 a sealing part 60 and a sealing washer 65 on. The sealing part 60 limited together with the sealing washer 65 in the axial direction, the pressure chambers 50 , Axial opposite to the sealing part 60 points the stator 20 a sealing cover 70 on. The sealing cover 70 limited axially opposite to the sealing part 60 the pressure chambers 50 , Axially between the sealing part 60 and the sealing lid 70 includes the stator 20 a stator ring 75 , The stator ring 75 limited in the circumferential direction and radially outwardly the pressure chambers 50 , Radial inside and in the circumferential direction, the pressure chambers 50 through the rotor 25 limited.

On the outside is on the stator ring 75 for example, an outer toothing 80 provided in which the belt 45 with an internally arranged internal toothing 85 combing intervenes. This allows the torque from the timing belt 45 in the stator ring 75 be initiated. Furthermore, the front side between the stator ring 75 and the sealing lid 70 a first sealing element 90 and between the sealing part 60 and the stator ring 75 a second sealing element 95 arranged. The sealing elements 90 . 95 seal the pressure chambers 50 both in the axial and in the radial direction.

The first sealing element 90 and / or the second sealing element, as in 1 shown to be formed as an O-ring and in a corresponding sealing groove in the stator ring 75 be arranged. Of course, it is also conceivable that the sealing element 90 . 95 differently formed or otherwise, for example in the sealing lid 70 and / or in the sealing part 60 , is positioned.

The sealing part 60 has a flange portion 100 and a collar portion 105 on. The flange section 100 extends in a plane of rotation perpendicular to the camshaft rotation axis 30 , Radially on the outside is a section of the external toothing 80 of the stator ring 75 spaced from the flange portion 100 arranged. Radially inside is the flange section 100 with the collar section 105 connected. The collar section 105 extends in the axial direction in one of the stator ring 75 and the pressure chamber 50 opposite direction. The flange section 100 is ring-shaped. The collar section 105 is hollow cylindrical and bounded on the inside a fluid space. In a semi-longitudinal section thus has the sealing part 60 an L-shaped configuration, but with a wall thickness (in the radial direction) of the collar portion 105 by way of example is less than a wall thickness (in the axial direction) of the flange portion 100 , However, this embodiment is exemplary. So it is also conceivable that the wall thicknesses of the flange 100 and the collar section 105 are essentially identical.

Radially outside, the collar portion 105 a trained as a running surface sealing surface 110 on. Radial outside to the sealing surface 110 is a third sealing element 115 , which is exemplified in the embodiment as a radial shaft seal arranged. The third sealing element 115 is between a housing collar 116 , the hollow cylinder with respect to the camshaft rotation axis 30 is formed, and the collar portion 105 arranged. The housing collar 116 of the housing 15 is radially outside to the collar portion 105 arranged. The third sealing element 115 is in operation of the hydraulic camshaft adjuster 10 at the sealing surface 110 on, with the sealing surface 110 rotates while the third sealing element 115 rotatably in the housing 15 is arranged. The third sealing element 115 seals the fluid space against an environment fluid-tight. In the fluid space, the pressurized fluid 55 be arranged.

In the embodiment, the sealing part 60 by means of a forming process, in particular by means of a deep-drawing process or a punch-bending process, made of a flat material, preferably a sheet. To ensure the functionality of the third sealing element 115 over the life of the hydraulic camshaft adjuster 10 is exemplary the sealing surface 110 post-processed by a cutting process after the forming process to a particularly good surface quality at the sealing surface 110 and ensure high concentricity. Of course, on the post-processing of the sealing surface 110 after carrying out the forming process for the production of the sealing part 60 be waived.

Radially inside to the flange portion 100 is the gasket 65 arranged. The sealing washer 65 is formed thinner in the axial direction than the flange portion 100 , The sealing washer 65 extends parallel to the flange portion 100 and is axially between the pressure chamber 50 and the collar portion 105 arranged.

Front side on a stator ring 75 facing side is the gasket 65 adjacent to the stator ring 75 radially outside and radially inside to the rotor 25 arranged.

2 shows an in 1 by means of the mark X marked section of the in 1 shown longitudinal section through the hydraulic camshaft adjuster 10 ,

The sealing part 60 points to one of the pressure chamber 50 and the stator ring 75 facing first end face 117 a first recess 120 on. The first recess 120 is in the axial direction towards the stator ring 75 or the pressure chamber 50 open. In the radial direction, the first recess 120 radially on the outside by a first recess side surface 125 limited. In the axial direction on a stator ring 75 opposite side has the first recess 120 a first recess reason 130 on. The first recess reason 130 extends in a plane of rotation perpendicular to the camshaft rotation axis 30 , The first recess reason 130 is in the direction of the collar section 105 from the pressure chamber 50 away staggered away.

With a radially outer first section 135 grabs the gasket 65 in the first recess 120 and lies on the first recess reason 130 with a second end face 145 flat on. A second radially inside to the first section 135 arranged second section 140 protrudes radially on the inside over the collar portion 105 , The sealing washer 65 limited to one of the stator ring 75 facing side of the pressure chamber 50 ,

In the embodiment, the first recess side surface is exemplified 125 cylindrically shaped. The first recess side surface 125 limited circumferentially radially inwardly toward the first recess 120 , wherein in the axial direction, the cone-like configuration is selected such that of the stator ring 75 and the pressure chamber 50 in the direction of the collar section 105 the first recess side surface 125 is formed tapering.

The sealing washer 65 is in the embodiment in the first recess 120 pressed and forms on an outer peripheral side 150 with the first recess side surface 125 a press federation 151 out. In this case, the outer peripheral side 150 the sealing disc 65 corresponding to the first recess side surface 125 be cylindrical. By the Press Association 151 In the embodiment, the sealing disc 65 non-positively with the sealing part 60 connected so that it is ensured that in the assembly of the hydraulic camshaft adjuster 10 the sealing part 60 together with the sealing washer 65 can be mounted without the gasket 65 unintentionally from the sealing part 60 solves. Also can on the press federation 151 be waived and the outer peripheral side 150 spaced from the first recess side surface 125 be arranged to form a leakage fluid channel.

The sealing washer 65 is punched in the embodiment by way of example by means of a punching process from a flat, preferably plate-shaped raw material, in particular from a sheet. This allows the gasket 65 For a particularly cost-effectively manufactured and on the other hand is a reliable positioning of the gasket 65 relative to the sealing part 60 ensured.

In the embodiment, the first recess 120 and the collar section 105 partially arranged radially overlapping. It is understood by a radial overlap that in a projection of two components in the axial direction, in the embodiment of the first recess 120 and the collar section 105 in a projection plane perpendicular to the camshaft rotation axis 30 , The two components, in the embodiment, the first recess 120 and the collar section 105 to cover in the projection. This is the first recess 120 and the collar section 105 Cover, it can be ensured that a particularly compact and low-material design of the sealing part 60 in conjunction with the sealing washer 65 can be provided so that the sealing part 60 and the sealing washer 65 together have a low weight. As a result, the total of the hydraulic camshaft adjuster 10 be kept particularly light.

3 shows a perspective view of the sealing washer 65 in the 1 and 2 shown hydraulic camshaft adjuster 10 from a first perspective.

The sealing washer 65 is on the second front side 145 Plan trained and free of interruptions. The second front side 145 is annular in plan view. An inner peripheral side 155 the sealing disc 65 is exemplified trained. Of course, it would also be conceivable that the inner peripheral side 155 cylindrical about the camshaft rotation axis 30 is formed running. The gradation of the inner peripheral side 155 is selected in the embodiment such that the inner peripheral side 155 from the collar section 105 towards the stator ring 75 in an inner diameter of the inner peripheral side 155 decreases.

4 shows a perspective view of the in the 1 to 3 shown sealing washer 65 from a second perspective.

The sealing washer 65 points to a second end face 145 opposite third front 160 a first section 161 a second recess 165 on. The first paragraph 161 the second recess 165 borders radially on the outside on the outer peripheral side 150 the sealing disc 65 at. The first paragraph 161 the second recess 165 has a substantially part-circular configuration. The first paragraph 161 the second recess 165 is radially outward and in the axial direction on one of the third end face 160 facing open side.

The second recess 165 has a second recess reason 170 on. In the second recess reason 170 of the first section 161 the second recess 165 is a first section 171 a pressure channel 175 arranged. The first section 171 is formed teilnutförmig. The pressure channel 175 is with other pressure channels, not shown, of the hydraulic camshaft adjuster 10 fluidly connected.

The first section 171 of the pressure channel 175 is groove-shaped in the second recess reason 170 educated. Another embodiment of the pressure channel 175 Of course, it would also be conceivable.

The second recess reason 170 is designed plan and the pressure channel 175 is as a recess in the second recess reason 170 educated. The pressure channel 175 extends almost over the entire width of the second recess 165 in the circumferential direction.

5 shows a perspective view of the in the 1 to 4 shown sealing washer 65 and the sealing part 60 in assembled condition.

The first front page 117 and the third front 160 are arranged running in a common plane of rotation.

Furthermore, in the flange section 100 a second section 185 the second recess 165 arranged. In a plan view is the second section 185 the second recess 165 partially circular shaped. The second section 185 and the first section 161 together form the second recess 165 in such a way that in the plan view of the second recess 165 the second recess 165 is circular. The second section 185 the second recess 165 is open in the circumferential direction inwards. Further, the second section 185 at the first end 117 open at the front.

Likewise, in the second recess reason 170 a second section 190 of the pressure channel 175 arranged. The second section 190 is formed teilnutförmig. The second section 190 forms together with the first section 171 the groove-shaped pressure channel 175 out. The pressure channel 175 has a slot-shaped configuration.

The second recess 165 has a second recess side surface 195 on, wherein the second recess side surface 195 through the first section 161 and the second section 185 is formed together. In the embodiment, the second recess side surface is 195 formed circular in plan view. Also another embodiment of the second recess side surface 195 would be possible.

6 shows an in 1 by means of the mark Y marked section of the in 1 shown longitudinal section through the hydraulic camshaft adjuster 10 ,

The hydraulic camshaft adjuster 10 has a locking device 200 on. The locking device 200 is in a third recess 205 of the rotor 25 arranged. The third recess 205 extends in the axial direction and may, for example, as a bore in the rotor 25 be educated. The locking device 200 is with the rotor 25 connected and has a movable between an unlocked position and a locking position in the axial direction locking means 210 , For example, a locking cap on.

Of particular advantage is when the stator 20 a deposit ring 215 having. The insert ring 215 is in the second recess 165 arranged. The insert ring 215 is annular. With an outer peripheral side 220 is the insert ring 215 on the second recess side surface 195 at. Preferably forms on the outer peripheral side 220 the insert ring 215 another press federation 216 with the second recess side surface 195 out, so that in the axial direction, a position of the insert ring 215 during assembly of the hydraulic camshaft adjuster 10 is reliably secured. On an inner peripheral side 225 is the insert ring 215 hardened and has a higher surface hardness than the second recess side surface 195 , At the front is the insert ring 215 on the second recess reason 170 at. In the axial direction of the insert ring 215 designed such that the insert ring 215 not on the first and third front 117 . 160 protrudes. This will provide a reliable movement of the rotor 25 ensured. The inside of the insert ring is limited 215 a lock receptacle 226 ,

In the locking position, the locking means engages 210 in the lock receptacle 226 of the deposit ring 215 one. Through the hardened inner peripheral side 225 of the deposit ring 215 becomes a low wear of the insert ring 215 at the lock receptacle 226 ensured. Further, the surface hardening of the second recess side surface may 195 be waived so that the hydraulic camshaft adjuster 10 is designed particularly inexpensive.

In the locking position, the locking means couples 210 , in particular during operation of the camshaft adjuster 10 below a predefined speed, the rotor 25 with the stator 20 , The predefined speed may, for example, be just below an idle speed or the idle speed of the engine 35 correspond. Above the predefined speed is a conveyor of the internal combustion engine 35 for the pressurized fluid 55 a pressure above a predefined pressure ready, wherein the pressurized fluid 55 over the pressure channel 175 on the front side on the locking means 210 acts. When the predefined pressure is exceeded by the pressure of the pressure fluid 55 becomes the locking means 210 against the action of a tensioning device 230 the locking device 200 from the locking receptacle 226 of the deposit ring 215 pushed out and into the rotor 25 moved so that the locking device 200 above the predefined speed or above the predefined pressure of the pressure fluid 55 the rotor 25 opposite the stator 20 releases and the rotor 25 depending on the pressure conditions in the pressure chambers 50 opposite the stator 20 can be twisted.

7 shows a longitudinal section through a hydraulic camshaft adjuster 10 according to a second embodiment.

The hydraulic camshaft adjuster 10 is essentially identical to that in the 1 to 6 shown hydraulic camshaft adjuster 10 educated. The following will focus solely on the differences from those in the 1 to 6 shown hydraulic camshaft adjuster 10 received.

Deviating from the in 1 to 6 shown hydraulic camshaft adjuster 10 is the sealing disc in the radial direction 65 more broadly formed than in the 1 to 6 shown. This is the second recess 165 completely in the gasket 65 arranged so that the two-part design of the second recess 165 can be waived.

Characterized in that in the radial direction, the sealing disc 65 is formed wider, is also corresponding to the configuration of the sealing disc 65 the first recess 120 more broadly formed than in the 1 to 6 shown. The first recess 120 ends with its first cutout side surface 125 radially outside of the locking device 200 , Here is the first recess side surface 125 radially outside to the collar portion 105 approximately radially at the height of the housing collar 116 of the housing 15 arranged on the radially inner side, the third sealing element 115 is arranged. The radially wider configuration of the sealing washer 65 has the advantage that on the orientation of the gasket 65 to the sealing part 60 can be dispensed with in the circumferential direction and thus regardless of the orientation in the circumferential direction of the gasket 65 in the sealing part 60 can be pressed. This is the assembly of the hydraulic camshaft adjuster 10 particularly easy and inexpensive.

8th shows a perspective view of the sealing washer 65 of in 7 shown hydraulic camshaft adjuster 10 ,

The second recess 165 can work together with the pressure channel 175 For example, by means of a pressing process, in particular a stamping process, in the sealing disc 65 be introduced. Thereby, that on a machining process for producing the second recess 165 and the pressure channel 175 can be omitted, the gasket 65 be made exclusively by forming process, so that the sealing disc 65 particularly fast and easy and inexpensive to produce.

9 shows a perspective view of the sealing part 60 of in 7 shown hydraulic camshaft adjuster 10 ,

The sealing part 60 is opposite to in 5 shown sealing part 60 characterized particularly simple design that the second recess 165 completely in the gasket 65 is arranged. This is at the first end 117 of the sealing part 60 in the flange section 100 only the first recess 120 arranged, wherein the first recess side surface 125 completely on a circular path revolving around the camshaft rotation axis 30 runs and has no further interruptions. This allows the sealing part 60 be made particularly simple and inexpensive in a forming process. In addition, radially outward to the first recess 120 slotted fourth recesses 235 be provided, which are arranged at regular intervals, for example in the circumferential direction to each other. Here is the fourth recess 235 open radially outwards. In the fourth recess 235 can be a tool in the assembly of the hydraulic camshaft adjuster 10 intervention.

10 shows a perspective view of the sealing part 60 with mounted sealing washer 65 and in the second recess 165 inserted insert ring 215 ,

The insert ring 215 hidden in the second recess 165 on the underside partially the pressure channel 175 , Through the sealing washer 65 gets on a the rotor 25 facing a forming area, so the area where the collar portion 105 with the flange section 100 is connected and in which the first material of the sealing part 60 in the manufacture of the sealing part 60 has its largest deformation, through the gasket 65 reliably covered. As a result, leaks in the sealing part 60 through the sealing washer 65 reliably avoided.

The first material suitable for the sealing part 60 in particular materials that are formable. Thus, for example, the sealing part 60 as the first material steel, aluminum, in particular sheet steel or aluminum sheet, on. The sealing washer 65 has at least one of the following second materials: aluminum, plastic, steel, sheet steel, aluminum sheet. Also by a suitable material combination of the first material and the second material, a total weight of the hydraulic camshaft adjuster 10 be kept very low.

11 shows a longitudinal section through a stator 20 a hydraulic camshaft adjuster 10 according to a third embodiment.

The hydraulic camshaft adjuster 10 is essentially identical to the ones in the 1 to 10 shown hydraulic camshaft adjusters 10 educated. The following is intended solely to the differences of in 10 shown hydraulic camshaft adjuster 10 opposite to in the 1 to 10 shown hydraulic camshaft adjusters 10 To be received.

The sealing part 60 In addition to the in the 1 to 10 shown sealing parts 60 an axial section 240 on, so that the sealing part 60 has a total cup-shaped configuration. The axial section 240 is hollow cylindrical and formed at an axial end with a radially outer side end of the flange portion 100 connected. Radially inside is the flange section 100 with the collar section 105 connected. Here is the axial section 240 axially on a collar section 105 opposite side of the flange portion 100 arranged. Radial on the outside can be attached to the flange section 100 a drive wheel 245 be arranged, on which the external toothing 80 is arranged. Alternatively, radially outward on the axial section 240 also the external toothing 80 be arranged.

With an inner peripheral side 250 as well as with the first front side 117 forms the sealing part 60 the first recess 120 out. As a result, in the radial direction, the sealing disc 65 be made particularly broad. At the junction between the axial section 240 and the flange portion 100 can be an underdog 251 be provided to a flat concerns the gasket 65 at the flange portion 100 sure. The outer peripheral side 150 is cylindrical. The outer peripheral side 150 can be spaced in the radial direction to the axial section 240 be arranged or the press federation 151 with the axial section 240 form.

Furthermore, in the flange section 100 a first shot 255 be provided, the first recording 255 on a collar section 105 facing side is closed. The first shot 255 is in alignment with a passage opening 260 the sealing disc 65 arranged. In the first shot 255 and the through hole 260 can be a fastener 261 for fixing the stator ring 75 intervention.

In addition, as in 11 shown between the gasket 65 and the flange portion 100 a washer 265 be provided. The washer 265 extends in a plane of rotation perpendicular to the camshaft rotational axis 30 ,

To the washer 265 can be fixed in the flange section 100 a second shot 270 be provided, wherein the second recording 270 a receiving peripheral surface 275 and a reason for admission 280 having. The reason for admission 280 is perpendicular to the first end face 117 of the flange portion 100 arranged. The washer 265 engages with a radially outer third section 285 in the second shot 270 one. A fourth section 290 protrudes on the inside over the collar section 105 radially inward. The fourth section 290 and the second section 140 ends radially on the inside, for example, at the same height.

With a fourth end face 295 the washer 265 is the washer 265 flat on the reception reason 280 at. The recording peripheral area 275 is radially inward to the first recording 255 arranged. This can be a particularly compact stator 20 to be provided.

12 shows an in 11 by means of a marker Z marked section of the in 11 shown longitudinal section through a development of in 11 shown hydraulic camshaft adjuster 10 ,

Instead of the in 11 shown undercut 251 has the gasket 65 radially outside at the transition between the second end face 145 and the outer peripheral side 150 a chamfer 300 on. The chamfer 300 ensures a secure press-fitting of the sealing washer 65 in the first recess 120 without tilting the sealing disc 65 at the sealing part 60 for sure.

The invention has been further illustrated and described with reference to the preferred embodiments. However, the invention is not limited to the disclosed examples. Rather, other variations may be deduced therefrom by those skilled in the art without departing from the scope of the invention. In particular, it is conceivable that the embodiments shown in the figures can be combined with each other.

LIST OF REFERENCE NUMBERS

10

hydraulic camshaft adjuster

15

casing

20

stator

25

rotor

30

Camshaft axis of rotation

35

Internal combustion engine

40

camshaft

45

belt

50

pressure chamber

55

pressure fluid

56

central valve

60

sealing part

65

sealing washer

70

sealing cover

75

stator

80

External toothing (of the stator ring)

85

Internal toothing (of the belt)

90

first sealing element

95

second sealing element

100

flange

105

collar section

110

sealing surface

115

third sealing element

116

housing collar

117

first end face

120

first recess

125

first recess side surface

130

first recess reason

135

first section (the sealing disc)

140

second section (the sealing disc)

145

second end face

150

outer peripheral side (the sealing disc)

151

Press Association

155

inner peripheral side (the sealing disc)

160

third front side

161

first section of the second recess

165

second recess

170

second recess reason

171

first section of the pressure channel

175

pressure channel

185

second section of the second recess

190

second section of the pressure channel

195

second recess side surface

200

locking device

205

third recess

210

locking means

215

insert ring

216

Press Association

220

outer peripheral side of the insert ring

225

inner peripheral side of the insert ring

226

locking receptacle

230

tensioning device

235

fourth recess

240

axial

245

drive wheel

250

inner peripheral side

251

Freeway

255

first recording

260

Through opening

261

fastener

265

washer

270

second shot

275

Recording circumferential surface

280

admission reason

285

third section (the washer)

290

fourth section (the washer)

295

fourth end face (the intermediate disc)

300

chamfer

Claims (9)

Hydraulic camshaft adjuster (10), comprising a stator (20) which can be driven by a crankshaft of an internal combustion engine (35) and a rotor (25) which can be coupled to a camshaft (40) of the internal combustion engine (35), the rotor (25) being rotatable around a camshaft rotational axis (30) of the camshaft (40) relative to the stator (20), - wherein the stator (20) comprises a sealing part (60), - wherein the sealing part (60) has a flange portion extending in a plane of rotation relative to the camshaft rotational axis (30) (100) and an axially extending collar portion (105) connected to the flange portion (100), wherein the collar portion (105) is disposed axially on a side of the flange portion (100) facing away from the rotor (25) and connected to the flange portion (100) is connected, - wherein the stator (20) comprises a sealing disc (65), - wherein the sealing disc (65) is arranged axially between the rotor (25) and the collar portion (105) on the flange portion (100), - wherein the sealing disc (65) at a radially outer first portion (135) engages in the flange portion (100) of the sealing part (60) and with the sealing part (60) is torque-connected, - wherein a radially inner side to the first portion (135) arranged second portion (140) of the sealing disc (65) radially inwardly beyond the collar portion (105) protrudes, - characterized in that the sealing part (60) on one of the rotor (25) facing first end face (117) has a first recess (120 ) having a recess bottom (130), - the recess base (130) in the direction of the collar portion (105) offset from the rotor (25) and the first recess (120) on a side facing the rotor (25) is open, in the first recess (120), the sealing disc (65) is arranged at least in sections and with a collar portion (105) facing the second end face (145) on the recess base (130). Hydraulic camshaft adjuster (10) to Claim 1 - wherein the first recess (120) has a first recess side surface (125) and the sealing disk (65) an outer peripheral side (150), - wherein the first recess side surface (125) in the radial direction, the first recess (120) limits, - the sealing washer (65) is press-fitted into the first recess (120) and bears against the first recess side surface (125) on an outer peripheral side (150) and has a press fit (151) to form the connection. Hydraulic camshaft adjuster (10) to Claim 2 - wherein the first recess (120) and the collar portion (105) are at least partially arranged radially overlapping - or - wherein the first recess side surface (125) is arranged radially outwardly to the collar portion (105). Hydraulic camshaft adjuster (10) according to one of the preceding claims, comprising a locking device (200), - wherein the locking device (200) is connected to the rotor (25) and comprises a locking means (210) movable between an unlocking position and a locking position in the axial direction, - wherein in the sealing disc (65) on a rotor (25) facing the third end face (160) at least partially a second recess (165) is arranged, - wherein the second recess (165) is formed axially open in the direction of the rotor (25), - wherein in the locking position, the locking means (210) to prevent rotation of the rotor (25) relative to the stator (20) engages in the second recess (165), - Wherein the rotor (25) in the unlocked position relative to the stator (20) about the camshaft rotational axis (30) is rotatable, - In the unlocked position, the locking means (210) outside the second recess (165) is arranged. Hydraulic camshaft adjuster (10) to Claim 4 - having a liner ring (215), - wherein the liner ring (215) is disposed in the second recess (165), - the liner ring (215) having an outer peripheral side (220) on a second recess side surface (195) of the second recess (165) and preferably forms a further interference fit (216) with the second recess side surface (195), - wherein the locking means (210) engages in the locking position in the insert ring (215), - wherein the insert ring (215) at least at an inner Peripheral side (225) has a greater surface hardness than the second recess side surface (195). Hydraulic camshaft adjuster (10) according to one of the preceding claims, - comprising a rotatably arranged housing (15) with a through the housing (15) limited housing interior and a sealing element (115), in particular a radial shaft seal, wherein in the housing interior of the stator (20) is arranged at least in sections, - wherein the sealing element (115) is arranged radially between the housing (15) and the collar portion (105) and on an outer peripheral side of the collar portion (105) or on an inner peripheral side of the Collar portion (105) rests. Hydraulic camshaft adjuster (10) according to one of the preceding claims, comprising an intermediate disc (265), - wherein the intermediate disc (265) extends in a further plane of rotation to the camshaft rotational axis (30), - wherein the intermediate disc (265) is arranged axially between the flange portion (100) of the sealing part (60) and the sealing disc (65), - Wherein in the flange portion (100) in the axial direction to the sealing disc (65) and radially inwardly open second receptacle (270) is provided, - wherein the second receptacle (270) has a receiving base (280), - wherein the receiving base (280), on which the intermediate disc (265) rests against the flange portion (100), is arranged parallel to an end face (117) of the flange portion (100), - wherein the intermediate disc (265) engages with a radially outer third portion (285) in the second receptacle (270), wherein a fourth section (290) of the intermediate disc (265) arranged radially inwards of the third section (285) is arranged outside the second receptacle (270), - Wherein the fourth portion (290) projects beyond the collar portion (105) radially inwardly. Hydraulic camshaft adjuster (10) according to one of the preceding claims, - wherein the sealing disc (65) is made of a substantially planar raw material by means of a stamping process, - wherein the sealing disc (65) has at least one of the following materials: aluminum, plastic, sheet metal, steel, sheet steel, aluminum sheet. Hydraulic camshaft adjuster (10) according to one of the preceding claims, wherein the sealing part (60) is produced by means of a forming process, in particular a punch bending or deep drawing process, - wherein advantageously the sealing part (60) has at least one of the following further materials: Steel, aluminum, in particular sheet steel or aluminum sheet.

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