U.S. patent application number 14/395326 was filed with the patent office on 2015-03-12 for rotor for a hydraulic camshaft phaser.
This patent application is currently assigned to Schaeffler Technologies GmbH & Co. KG. The applicant listed for this patent is SchaefflerTechnologies GmbH & Co. KG. Invention is credited to Olaf Boese, Rainer Ottersbach.
Application Number | 20150068484 14/395326 |
Document ID | / |
Family ID | 48040204 |
Filed Date | 2015-03-12 |
United States Patent
Application |
20150068484 |
Kind Code |
A1 |
Boese; Olaf ; et
al. |
March 12, 2015 |
ROTOR FOR A HYDRAULIC CAMSHAFT PHASER
Abstract
A rotor (2) for a hydraulic camshaft phaser (1), including a hub
(5) that holds a camshaft and including an outer shell (6) with a
plurality of vane elements (7), whereby hydraulic-medium channels
(24, 26) run from the interior of the hub (5) to the outer shell
(6). At least one hydraulic-medium channel (24, 26) is interrupted
by an axial recess (16) in the material, whereby a bushing (47)
that connects the interrupted hydraulic-medium channel (24, 26) is
inserted into the recess (16) in the material. A hydraulic camshaft
phaser (1) having such a rotor (2). The recess (16) provided in the
material renders the rotor (2) and the camshaft phaser (1)
particularly lightweight.
Inventors: |
Boese; Olaf; (Nuernberg,
DE) ; Ottersbach; Rainer; (Aurachtal, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
SchaefflerTechnologies GmbH & Co. KG |
Herzogenaurach |
|
DE |
|
|
Assignee: |
Schaeffler Technologies GmbH &
Co. KG
Herzogenaurach
DE
|
Family ID: |
48040204 |
Appl. No.: |
14/395326 |
Filed: |
March 26, 2013 |
PCT Filed: |
March 26, 2013 |
PCT NO: |
PCT/EP2013/056330 |
371 Date: |
October 17, 2014 |
Current U.S.
Class: |
123/192.1 |
Current CPC
Class: |
F01L 1/3442 20130101;
F01L 2001/34423 20130101; F01L 2303/00 20200501 |
Class at
Publication: |
123/192.1 |
International
Class: |
F02B 75/06 20060101
F02B075/06 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 6, 2012 |
DE |
10 2012 209 532.2 |
Claims
1-10. (canceled)
11. A rotor for a hydraulic camshaft phaser, the rotor comprising:
a hub holding a camshaft and including an outer shell with a
plurality of vane elements, hydraulic-medium channels running from
an interior of the hub to the outer shell, at least one of the
hydraulic-medium channels being interrupted by an axial recess in a
material, a bushing connecting the interrupted hydraulic-medium
channel being inserted into the recess in the material.
12. The rotor as recited in claim 11 wherein the recess in the
material is in the form of an annular space interrupting several
hydraulic-medium channels and being situated between the hub and
the outer shell, whereby, in each case, the bushing or another
bushing is inserted to connect each of the interrupted
hydraulic-medium channels.
13. The rotor as recited in claim 12 wherein the annular space is
interrupted by at least one radial web.
14. The rotor as recited in claim 10 wherein the bushing is
arranged on an insert piece having the shape of ring segments or
being ring-shaped and inserted into the recess in the material.
15. The rotor as recited in claim 14 wherein the insert piece
includes a plurality of axial projections so that, at an axial
height, the insert piece inserted is flush with the outer
shell.
16. The rotor as recited in claim 15 wherein the bushing is
arranged on an axial projection.
17. The rotor as recited in claim 10 further comprising a locking
section with a hole to receive a movable locking bolt, the hole
being open up to an axial wall section at a hole entrance, a
support element serving as a counterbearing for the locking bolt
being inserted into an open section opposite from the hole
entrance.
18. The rotor as recited in claim 17 further comprising a support
crosspiece having an axial spine as the support element.
19. The rotor as recited in claim 17 wherein the support element
with the bushing is arranged on an insert piece.
20. A camshaft phaser comprising: a stator and a rotor as recited
in claim 10 rotatable around a rotational axis relative to the
stator.
Description
[0001] The invention relates to a rotor for a hydraulic camshaft
phaser, comprising a hub that holds a camshaft and comprising an
outer shell with a plurality of vane elements, whereby
hydraulic-medium channels run from the interior of the hub to the
outer shell. The invention also relates to a hydraulic camshaft
phaser having such a rotor.
BACKGROUND
[0002] A rotor and a camshaft phaser of the above-mentioned type
are disclosed, for example, in U.S. Pat. No. 7,661,397 B2. In such
a camshaft phaser, the rotor is mounted in a stator so that it can
rotate around an axis of rotation. The phase shift of a camshaft
with respect to a crankshaft of an internal combustion engine can
be set by rotating the rotor relative to the stator. For this
purpose, when the camshaft phaser is in the installed state, the
rotor is non-rotatably joined to the camshaft while the stator is
non-rotatably joined to the crankshaft of the internal combustion
engine.
[0003] According to U.S. Pat. No. 7,661,397 B2, the rotor has a hub
that holds the camshaft. A plurality of vane elements is arranged
on the outer shell of the rotor, and each of these vane elements
engages between separating elements of the stator so as to seal
them. Each vane element divides the space between two separating
elements into two pressure chambers that can alternately be
supplied with a hydraulic medium via hydraulic-medium channels
running from the interior of the hub to the outer shell. When one
of the pressure chambers is charged with a hydraulic medium while
the hydraulic-medium channel of the other pressure chamber is
opened towards an outlet, the rotor is adjusted vis-a-vis the
stator. The pressure chamber that--when it is charged with a
hydraulic medium--leads to an advance of the rotor with respect to
the stator is also referred to as the early-adjustment chamber. The
other pressure chamber is correspondingly referred to as the
late-adjustment chamber. In order to establish a connection to the
hydraulic control system, the hydraulic-medium channels in the hub
are flow-connected to axial supply spaces that are situated in the
camshaft and that can be activated from the outside, or else these
hydraulic-medium channels are connected directly to a central valve
that is integrated into the camshaft.
SUMMARY OF THE INVENTION
[0004] Since rotors of this type require a great deal of material,
they have the drawback that they are very heavy and also
labor-intensive to manufacture because of the processing steps
needed to create the hydraulic-medium channels, for instance, by
means of drilling.
[0005] It is an object of the invention to provide a rotor of the
above-mentioned type that, to the greatest extent possible, is
lightweight as well as easy to manufacture. Furthermore, a camshaft
phaser of the above-mentioned type that is correspondingly
lightweight and easy to manufacture is also being provided.
[0006] The present invention provides a rotor having a hub that
holds a camshaft and having an outer shell with a plurality of vane
elements--whereby hydraulic-medium channels run from the interior
of the hub to the outer shell--in that at least one
hydraulic-medium channel is interrupted by an axial recess in the
material, whereby a bushing that connects the interrupted
hydraulic-medium channel is inserted into the recess in the
material.
[0007] In this context, in a first step, the invention is based on
the notion that the area that can be cut away or exposed on a rotor
is fundamentally an area that does not have a bearing or sealing
function. In the invention, however, it has surprisingly been found
that, in a second step, especially the area of a hydraulic-medium
channel can be exposed, even though this fundamentally interrupts
the connection of the pressure chamber to the hydraulic system. The
flow-connection of a hydraulic-medium channel that has been
interrupted by an exposed section or by a recess created in the
material is re-established in a simple manner by an inserted
bushing.
[0008] A recess in the material--something that had not been taken
into consideration up to now--in the area of a hydraulic-medium
channel or in the area of several hydraulic-medium channels makes
it possible to manufacture a rotor that weighs considerably less
than the prior-art types. The hydraulic-medium channels that are
interrupted by the recess in the material are connected by simply
inserting an appropriate bushing into the open recess in the
material. In particular, the bushing can be made of plastic by
means of non-cutting shaping. However, it can also be made of
metal, for instance, aluminum.
[0009] In order to achieve a reliable coupling in terms of the flow
as well as a relatively simple sealing, the inner diameter of the
bushing is selected so as to be larger than the diameter of the
appertaining hydraulic-medium channel that has been cut open. This
also simplifies the insertion of the bushing into the recess in the
material since, to a certain extent, this measure makes allowance
for tolerances in the alignment of the inserted bushing with
respect to the hydraulic-medium channel that has been cut open.
Advantageously, the bushing has positive-fit elements which, as
they interact with complementary shapes on the rotor, only allow
the bushing to be inserted in a precise position and with the
proper angle orientation.
[0010] A preferred variant ensures the sealing function of the
bushing that bridges the recess in the material in that the bushing
is inserted with an axial press fit vis-a-vis the hydraulic-medium
channel. If the bushing is made of a suitable flowable plastic, a
permanent sealing functionality that is sufficient for the camshaft
phaser is achieved. If the bushing is made of a fiber-reinforced
plastic, then preference is given to a material that has a thermal
expansion coefficient that is comparable to that of the material of
the rotor. For instance, a fiberglass-reinforced epoxy resin can be
employed as the material for the bushing in the case of a rotor
made of aluminum.
[0011] The recess made in the material of the rotor is preferably
rotation-symmetrical in order to avoid an unbalance. In particular,
several ring-segmented recesses can be provided in the material,
each of which interrupts several hydraulic-medium channels. In an
advantageous variant, the recess in the material is essentially in
the form of an annular space that interrupts several
hydraulic-medium channels and that is situated between the hub and
the outer shell, whereby, in each case, a bushing is inserted in
order to connect each of the interrupted hydraulic-medium channels.
Thanks to this configuration, the weight of the rotor can be
greatly reduced. With an eye towards a simple angle-oriented
installation of the bushing, the annular space is advantageously
interrupted by at least one radial web. Such a web constitutes a
stop element for the bushing part that is to be inserted, as a
result of which the installation can only take place in a defined
angular position or in a precise position. As an alternative, a
projection or a groove can be created in the annular space,
especially along the circumference or at the bottom, for purposes
of an angle-oriented installation of the bushing.
[0012] If the recess in the material has the shape of ring segments
or of an annular space, the one bushing or each bushing is
advantageously arranged on an insert piece that has the shape of
ring segments or of an annular space and that is inserted into the
recess in the material. In this variant, especially all of the
bushings are combined on a single insert piece that, for
installation purposes, is then inserted into the recess in the
material, if applicable, stopping against the above-mentioned web.
In this context, especially the bottom of the rotor constitutes an
axial stop element. The angle-oriented installation of the insert
piece is prescribed by positive-fit elements or especially by a
radial web.
[0013] In another advantageous embodiment, the insert piece
comprises a number of axial projections so that, at its axial
height, the insert piece that has been inserted is flush with the
outer shell. As a result, in the installed state, it is ensured
that the bushings arranged on the insert piece are situated on an
axial plane together with the hydraulic-medium channels that are
each to be connected. The insert piece is held by means of its
axial projections between the covers of the camshaft phaser,
especially between the bottom of the rotor and the locking cover of
the stator. The axial projections can be located on one side of the
insert piece. However, in the circumferential direction, the axial
projections can also extend alternately to one axial side and then
to the other axial side.
[0014] Advantageously, the one bushing or each bushing is arranged
on an axial projection. As a result, a base of the insert piece
that connects the bushings or the axial projections can be
manufactured with as little material as possible so as to be very
lightweight. If the hydraulic-medium channels for the
early-adjustment and late-adjustment chambers are axially offset
with respect to each other in the rotor, then preference is given
to a variant in which the axial projections extend in the
circumferential direction alternately to one axial side and then to
the other axial side, whereby the bushings that supply the
early-adjustment chambers are arranged in the one set of axial
projections, whereas the bushings that supply the late-adjustment
chambers are arranged in the other set of axial projections.
[0015] The insert piece can be made as a single part or else it can
consist of several parts. In particular, the insert piece can be
made of plastic by means of non-cutting methods. It can also be
made of metal by means of non-cutting methods such as, for
instance, a sintering method.
[0016] In one independently inventive embodiment, with an eye
towards reducing the weight of a rotor of the above-mentioned
type--which comprises a locking section with a hole to receive a
movable locking bolt--the hole is created in such a way that it is
open up to an axial wall section at the entrance of the hole,
whereby a support element that serves as a counterbearing for the
locking bolt is inserted into the open section opposite from the
entrance to the hole.
[0017] This variant of a rotor can be implemented independently of
the feature involving hydraulic-medium channels in the rotor. In
this context, the invention is based on the consideration that,
because of the mechanical locking function that has to be fulfilled
vis-a-vis the stator, the locking section on the rotor is
associated with a relatively large accumulation of mass since it
calls for the use of more material. When the internal combustion
engine is at a standstill, such a locking section allows the rotor
to be locked in a defined angular position with respect to the
stator. Consequently, when the internal combustion engine is
started, even if the pressure generated in the hydraulic system is
not yet sufficient, it is ensured that the rotor does not move in
an uncontrolled manner and does not strike against the separating
elements of the stator, which would cause undesired noises in the
camshaft phaser.
[0018] The independent inventive solution is also based on the
consideration that the relatively large accumulation of mass in the
locking section causes a greater unbalance in the rotor. The
greater the distance between the rotational axis and the locking
section on the rotor, the greater the unbalance. An unbalance,
however, detrimentally results in an undesired additional stress on
the bearing, thus causing greater wear and tear on the camshaft
phaser. Moreover, it is desirable to reduce the total weight of the
rotor.
[0019] For purposes of achieving the objective, the invention
surprisingly provides for the hole that holds the locking bolt to
be left open to the greatest extent possible, so that only a
relatively thin wall section remains at the entrance to the hole.
The support and bearing functions for the locking bolt--which up
until now had been fulfilled by the bottom of the hole, are now
assumed by a support element located opposite from the entrance to
the hole. This support element can be configured as a separate
component and can be inserted into the open section. However, the
support element can also be made as part of the rotor so that it is
joined directly to the edge of the open section.
[0020] In a preferred embodiment, the support element is configured
as a support crosspiece that has an axial arbor projection.
Especially a mechanical restoring means, for instance, a helical
spring or the like, can be placed onto this arbor projection. The
guidance and counterbearing of the locking bolt are effectuated by
the hole entrance and by the arbor projection on the support
element. The configuration as a support crosspiece allows radial
forces of the locking bolt to be absorbed and dissipated into the
rotor.
[0021] In a particularly preferred embodiment, the open design of
the locking section and the presence of a corresponding support
element in a rotor are combined with a recess in the material that
interrupts one or more hydraulic-medium channels, whereby, in each
case, a bushing is inserted into the recess in the material in
order to connect each of the interrupted hydraulic-medium
channels.
[0022] In an especially preferred embodiment, the support element
with the one bushing or with each bushing is arranged on a shared
insert piece. This permits a very simple installation. Moreover,
the support element--which is to be inserted into the open section
of the hole--also allows an angle orientation of the bushings. In
particular, the rotor can be manufactured with a closed annular
space between the hub and the outer shell, which translates into a
very substantial weight reduction. During installation, the
appropriate insert piece--which comprises the bushings that connect
the hydraulic-medium channels as well as the support element for a
locking bolt that is to be subsequently inserted--is simply
inserted into the annular space. The shared insert piece with the
bushings and the support element can be manufactured without a
mold. It can be made of plastic as well as of metal.
[0023] The second objective is achieved according to the invention
by means of a camshaft phaser comprising a stator and a rotor of
the above-mentioned type that can be rotated around a rotational
axis relative to the stator. The advantages cited for the rotor and
its refinements apply accordingly to the camshaft phaser.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Embodiments of the invention are explained in greater detail
on the basis of a drawing. The following is shown in a perspective
view:
[0025] FIG. 1 the rotor of a hydraulic camshaft phaser inserted
into a stator, whereby the rotor has a ring-shaped recess in the
material which has been created axially up to the locking section
and which interrupts the hydraulic-medium channels;
[0026] FIG. 2 an insert piece that has been inserted into the
recess in the material of the rotor according to FIG. 1, said
insert piece having a number of bushings to connect the interrupted
hydraulic-medium channels;
[0027] FIG. 3 the rotor according to FIG. 1, with an inserted
insert piece according to FIG. 2;
[0028] FIG. 4 the underside of the rotor according to FIG. 1 or
FIG. 3;
[0029] FIG. 5 another rotor for a hydraulic camshaft phaser,
whereby an encircling ring-shaped recess that interrupts the
hydraulic-medium channels has been axially created and this recess
in the material also encompasses a locking section;
[0030] FIG. 6 an insert piece that has been inserted into the
annular space of the rotor according to FIG. 5 and that has a
number of bushings to connect the interrupted hydraulic-medium
channels as well as a support element as a counterbearing for a
locking bolt;
[0031] FIG. 7 the rotor according to FIG. 5, with an inserted
insert piece according to FIG. 6; and
[0032] FIG. 8 the underside of the rotor according to FIG. 7, with
an inserted insert piece.
DETAILED DESCRIPTION
[0033] FIG. 1 shows a camshaft phaser 1 comprising a rotor 2 and a
stator 3. For the sake of clarity, the stator 3 is only partially
shown. The rotor 2 is mounted so as to rotate around a rotational
axis 4 relative to the stator 3. In order to be attached to a
camshaft, the rotor 2 has a hub 5. The rotor 2 with its vane
elements 7 on the outer shell 6 is inserted into the interior of
the stator 3. Sealing elements 10 inserted into grooves 9 on the
vane elements 7 then create a seal vis-a-vis the stator 3. The
stator 3 is connected to the crankshaft of an internal combustion
engine by means of a drive means (not shown in the drawing).
[0034] In order to lock the rotor 2 in a defined angular position
with respect to the stator 3, for instance, during the start-up
phase of the internal combustion engine, the rotor 2 also has a
locking section 12 with a hole 14 into which a locking bolt can be
inserted. In the appropriate angular position, the inserted locking
bolt can engage into a recess of the stator 3, so that the rotor 2
and the stator 3 are mechanically bolted to each other.
[0035] The rotor 2 has a ring-shaped recess 16 in the material
which has been created axially up to the locking section 12. The
resultant annular space 18 can be clearly seen. In the area of the
recess 16 in the material, the hub 5 and the outer shell 6 are each
reduced down to an encircling collar having the wall thickness
shown there. In other words, the entire rotor 2 is formed so as to
be essentially pot-shaped and to enclose the inner hub 5. The
locking section 12 interrupts the ring-shaped recess 16 in the form
of a radial web 19.
[0036] A row of corresponding holes 20 can be seen on the hub 5 and
on the outer shell 6, whereby these holes each belong to the first
hydraulic-medium channels 24 and second hydraulic-medium channels
26. These hydraulic-medium channels 24 and 26 are interrupted by
the corresponding recesses 16 in the material. The first
hydraulic-medium channels 24 are arranged axially offset with
respect to the second hydraulic-medium channels 26. The
early-adjustment chambers 28 formed between the rotor 2 and the
stator 3 are connected to a hydraulic pressure system via the
hydraulic-medium channels 24, whereas the late-adjustment chambers
30 are connected to a hydraulic pressure system via the second
hydraulic-medium channels 26. The individual hydraulic-medium
channels 24, 26 are flow-connected in the interior of the hub 5 in
that they are coupled to axial supply spaces in the camshaft, or
else in that they are directly coupled to the inlet or outlet of a
central valve installed in the camshaft. For purposes of forming
the early-adjustment and late-adjustment chambers 28, 30,
respectively, in each case a vane element 6 engages between two
adjacent separating elements 31 of the stator 3.
[0037] Owing to the approximately ring-shaped axial recess 16
created in the material, the weight of the rotor 2 is markedly
reduced in comparison to prior-art embodiments. In order to
re-establish the connection of the early-adjustment and
late-adjustment chambers 28, 30, respectively, to the hydraulic
pressure system, bushings 47 (see FIG. 2) are inserted between the
corresponding holes 20 in the hub 5 and outer shell 6.
[0038] For purposes of facilitating the installation, the bushings
47 shown in FIG. 2 are arranged on a shared insert piece 40. The
insert piece 40 has a base 42 in the form of an open ring. First
axial projections 44 and second axial projections 45 that extend
alternately to one axial side and then to the other axial side are
arranged in the circumferential direction on the base 42. The
bushings 47 each pass through the axial projections 44 and 45. The
axial gap 48 is visible on the open ring of the base 42. At the
same time, a stop element 49 is defined on the base 42 by the axial
gap 48. When the insert piece 40 is in the installed state, it is
in contact via this stop element 49 with the radial web 19 of the
rotor 2 shown in FIG. 1. As a result, a defined angular position of
the insert piece 40 on the rotor 2 is prescribed, so that there is
no need for a laborious adjustment and inspection of the installed
position during the installation process.
[0039] In FIG. 3, the rotor 2 shown in FIG. 1 is depicted with the
inserted insert piece 40 shown in FIG. 2. It can be seen how, since
the insert piece 40 has been inserted, the hydraulic-medium
channels 24, 26 that are interrupted by the recess 16 in the
material are once again individually flow-connected to each other
via the bushings 47. The axial installation position of the insert
piece 40 results from the fact that the first axial projection 44
stops against the bottom of the rotor 2. Via the second axial
projections 45, the axial height of the insert piece 40 is flush
with the axial height of the outer shell 6. In the installed state,
a locking cover axially encloses the rotor 2 and thus the insert
piece 40 in the stator 3. The angular position of the insert piece
40 is defined by the stop element 49 as it stops against the
locking section 12.
[0040] In an embodiment given by way of an example, the inner
diameter of the bushings 47 is selected so as to be greater than
the diameter of the holes 20. This results in a reliable
flow-coupling, even if the bushings 47 are not oriented ideally
when it comes to their being flush with the holes 20.
[0041] In the installed state shown in FIG. 3, it can also be seen
that the bushings 47 of the second axial projections 45 are axially
offset with respect to the bushings 47 of the first axial
projections 44 and thus they each form the first hydraulic-medium
channels 24 and second hydraulic-medium channels 26, respectively,
and they also connect the corresponding holes 20. In this context,
the bushings 47 are inserted by means of a radial press fit into
the annular space 16 between the hub 5 and the outer shell 6, which
corresponds to an axial press fit in the direction of the holes 20
or of the hydraulic-medium channels 24, 26. The resultant sealing
functionality meets the criteria required for a hydraulic camshaft
phaser 1.
[0042] In FIG. 4, the rotor 2 shown in FIG. 2 or 3 is depicted from
a different perspective view towards the bottom 50. The holes 20
for the first and second hydraulic-medium channels 24, 26,
respectively, are visible in the interior of the hub 5 and on the
outer shell 6.
[0043] FIG. 5 shows a rotor 2 according to an alternative variant.
In comparison to the rotor 2 shown in FIG. 1, in FIG. 5, the
locking section 12 is additionally open up to a wall section 52 in
which the locking hole 14 has been made. Consequently, the axial
recess 16 created in the material between the hub 5 and the outer
shell 6 is altogether ring-shaped.
[0044] FIG. 6 shows an appertaining insert piece 40 that is
inserted into the annular space 18 of the rotor 2 shown in FIG. 5.
In addition to the already described bushings 47 which, in turn,
are arranged on corresponding axial shoulders 44, 45, the
ring-shaped base 42 of the insert piece 40 shown in FIG. 6 now
comprises a support element 54 in the form of a support crosspiece
55. In the hole section 12 of the rotor 2, in conjunction with the
wall section 52, this support element 54 takes on the function of a
blind hole in which a locking bolt is guided and supported in the
manner of a counterbearing. The resulting elimination of material
translates into an additional weight reduction for the rotor 2
shown in FIG. 5. In particular, the unbalance caused by the locking
section 12 is diminished.
[0045] The support element 54 also comprises an axial arbor
projection 57. In the installed state, a helical spring is mounted
on this arbor projection 57, said helical spring serving to
pre-tension the inserted locking bolt against the locking cover.
The configuration as a support crosspiece 55 allows the arbor
projection 57 to absorb not only axial forces but also radial
forces (relative to the direction of movement of the locking bolt)
and to dissipate these forces into the rotor 5.
[0046] In FIG. 7, the rotor 2 shown in FIG. 5 is depicted with the
inserted insert piece 40 shown in FIG. 6. The angular orientation
of the insert piece 40 relative to the rotor 2 is prescribed in a
defined manner in that the arbor projection 57 is inserted into the
hole 14 in the locking section 12.
[0047] FIG. 8 depicts the rotor 2 shown in FIG. 7 from a
perspective view towards the bottom 50. In this perspective, it can
be seen how the arbor projection 57 is inserted opposite from the
hole entrance 58. The arbor projection 57 of the support element 54
assumes the function of a cartridge that has been normally used up
until now in which the locking bolt is mounted so as to be
pre-tensioned by means of a spring.
LIST OF REFERENCE NUMERALS
[0048] 1 camshaft phaser [0049] 2 rotor [0050] 3 stator [0051] 4
rotational axis [0052] 5 hub [0053] 6 outer shell [0054] 7 vane
element [0055] 9 groove [0056] 10 sealing element [0057] 12 locking
section [0058] 14 hole [0059] 16 recess in the material [0060] 18
annular space [0061] 19 web [0062] 20 holes [0063] 24 first
hydraulic-medium channel [0064] 26 second hydraulic-medium channel
[0065] 28 early-adjustment chamber [0066] 30 late-adjustment
chamber [0067] 31 separating element [0068] 40 insert piece [0069]
42 base [0070] 44 first axial projections [0071] 45 second axial
projections [0072] 47 bushing [0073] 48 axial gap [0074] 49 stop
element [0075] 50 bottom [0076] 52 wall section [0077] 54 support
element [0078] 55 support crosspiece [0079] 57 arbor projection
[0080] 58 hole entrance
* * * * *