WO2010009697A1 - Drive system for an infinitely variable transmission of a motor vehicle - Google Patents
Drive system for an infinitely variable transmission of a motor vehicle Download PDFInfo
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- WO2010009697A1 WO2010009697A1 PCT/DE2009/000938 DE2009000938W WO2010009697A1 WO 2010009697 A1 WO2010009697 A1 WO 2010009697A1 DE 2009000938 W DE2009000938 W DE 2009000938W WO 2010009697 A1 WO2010009697 A1 WO 2010009697A1
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- Prior art keywords
- drive shaft
- shaft
- eccentric
- adjusting
- drive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H29/00—Gearings for conveying rotary motion with intermittently-driving members, e.g. with freewheel action
- F16H29/02—Gearings for conveying rotary motion with intermittently-driving members, e.g. with freewheel action between one of the shafts and an oscillating or reciprocating intermediate member, not rotating with either of the shafts
- F16H29/04—Gearings for conveying rotary motion with intermittently-driving members, e.g. with freewheel action between one of the shafts and an oscillating or reciprocating intermediate member, not rotating with either of the shafts in which the transmission ratio is changed by adjustment of a crank, an eccentric, a wobble-plate, or a cam, on one of the shafts
Definitions
- the present invention relates to a drive arrangement for a continuously variable transmission, in particular for a crank CVT of a motor vehicle.
- From DE 102 43 535 A1 discloses a continuously variable transmission of a motor vehicle, which essentially comprises a drive shaft and an output shaft, which are aligned parallel to one another rotatably mounted in a transmission housing.
- these two shafts are connected to one another via an eccentric device provided on the drive shaft and a freewheel device arranged on the output shaft.
- the eccentric consists of a plurality of eccentric units, which are arranged axially next to one another on the drive shaft.
- the freewheel device consists of several freewheel units, which are arranged axially adjacent to one another on the drive shaft.
- the drive shaft has a guide area offset eccentrically with respect to its axis of rotation, on the lateral surface of which an eccentric component is rotatably mounted.
- the drive shaft On the Exzenterbauteil one side of at least one connecting rod is rotatably mounted in the configuration of the continuously variable transmission as a crank CVT (Continuous Variable Transmission).
- Each eccentric component has a recess for receiving a guide region of the drive shaft, wherein an internal toothing extends around the recess.
- the internal toothing is matched to the lateral surface of the guide region in such a way that the eccentric component is centered over the internal toothing on the guide region.
- the drive shaft or the guide areas of the same have a recess extending in the direction of the axis of rotation of the drive shaft, in which an adjustment shaft is rotatably arranged.
- the adjusting shaft has an outer toothing, which engages in the internal toothing of the eccentric components.
- the adjusting shaft is mounted in the recess of the driving shaft via the sections of the external toothing forming the tip circle of the external toothing.
- the guide areas are designed so crescent-shaped that their recesses are open over a certain angular range, so that in these angular ranges, the external toothing of the adjusting against the outer maneuvering tel specifications the guide portions can protrude radially, with engagement in the internal teeth of the Exzenterbaumaschinemaschines is possible.
- the disk-like guide areas have with respect to their cylindrical surface a center line which is arranged eccentrically by a certain distance from the axis of rotation of the drive shaft.
- the eccentric members have, with respect to their cylindrical surfaces, a centerline which is eccentrically offset from said centerline of the guide portions by a distance such that the eccentricity of the centerline of the eccentric members with respect to the axis of rotation of the drive shaft is twice as large as the eccentricity of the centerline of the actuator Guide areas opposite this axis of rotation.
- the eccentric component of an eccentric unit Due to the rotation of the adjusting shaft in the recess of the drive shaft, the eccentric component of an eccentric unit is rotated about the center line of the corresponding guide region.
- the center line of the Exzenterbauerss moves around the center line of the guide portion, wherein the extent of the eccentricity of the Exzenterbauerss is changed with respect to the axis of rotation of the driving shaft.
- the adjusting is usually inserted in the known stepless crank CVT's without storage and with little play in the drive shaft.
- a problem is that the flexible drive shaft is supported under load on the adjusting shaft, whereby an increased adjusting torque arises, which is due to a metallic friction when clamping the adjusting shaft in the axial recess of the driving shaft. Since the adjusting torque is increased, this leads to an increased power requirement on the side of the adjusting shaft rotating when adjusting electric drive.
- a deflection of the flexurally soft drive shaft can be minimized according to a patent application of the same date of the present patent applicant, that the mounted with their outer sides in a transmission housing drive shaft is additionally stored in its central region with respect to the transmission housing.
- axially spaced, cylindrical stiffening areas can be provided between the outer bearing points of the drive axle.
- the object of the present invention is to design a drive arrangement for a continuously variable transmission of a motor vehicle such that a deflection of the drive shaft can be largely reduced or avoided without additional axial space is claimed.
- a drive arrangement for a continuously variable transmission in particular a crank CVT of a motor vehicle, having a drive shaft whose outer regions are mounted in a transmission housing.
- the drive shaft has a recess in which an adjusting shaft is rotatably arranged, in the rotation of the Exzenterbaumaschine an arranged on the drive shaft eccentric are continuously adjustable.
- the drive shaft has in its central region at least one cylindrical disk-shaped stiffening region.
- the adjusting shaft has in the axial direction spaced from each other at least one circumferential groove which, when the adjusting shaft is mounted in the recess of the drive shaft, is aligned with the stiffening region.
- rolling elements are arranged such that they are supported on the one hand on the serving as an inner raceway bottom surface of the circumferential groove and on the other hand on serving as the outer race inner surface of the stiffening region.
- the essential advantage of the drive arrangement according to the invention is that a largely friction-free mounting of the adjusting shaft in the recess of the drive shaft is made possible, wherein the inner cylindrical surface of the at least one central stiffening region of the drive shaft is used as a running surface for rolling bearings.
- Particularly advantageous for achieving a friction-free mounting of the adjusting shaft in the central region in the axial direction of the adjusting a plurality of stiffening regions are arranged spaced from each other and has the Verstellweile this stiffening regions according to a plurality of circumferential grooves.
- the rolling elements are held in an annular cage, which is expediently interrupted at one point by an opening region. In this way, a particularly simple and quick installation of the rolling body in the circumferential grooves is possible.
- the adjusting shaft may have an external toothing extending in its axial direction for adjusting the eccentric components, wherein this external toothing is interrupted in the regions of the circumferential grooves.
- the drive shaft can be used in a preferred application - A - tion of the drive assembly according to the invention be part of a crank-CVT's, wherein the rotation of the drive shaft is transmitted via an eccentric arranged on the drive shaft to a freewheel device mounted in a gear housing parallel to the drive shaft output shaft, wherein the eccentric on the drive shaft in the axial direction each having a recess for receiving a with respect to the axis of rotation of the drive shaft eccentrically arranged guide region, wherein the internal teeth of the Exzenterbaumaschinemaschine engage in the outer toothing of the adjusting shaft.
- an eccentric component is arranged between each two adjacent reinforcing regions.
- Figure 1 is a longitudinal section of a drive shaft of a known crank CVT, wherein the drive shaft axially spaced stiffening regions to prevent deflection, wherein in a recess of the drive shaft, an adjusting shaft is arranged and wherein in Unfangsnuten the adjusting shaft on the inner surfaces of the stiffening areas and on the bottom surfaces the circumferential grooves supporting rolling bearings are provided;
- Figure 2 is a perspective view of the arrangement of Figure 1;
- FIG. 3 is a perspective view of the adjusting shaft of the invention
- Figure 5 is a perspective view of a rolling bearing with flexible cage
- Figure 6 is a perspective view of a drive shaft, wherein the at
- FIG. 7 shows a side view, indicated by the lines VII-VII of FIG
- FIG. 8 shows a side view, indicated by the lines VIII-VIII in FIG.
- a space-saving and low-friction mounting of the drive shaft on the adjusting shaft can be achieved by utilizing arranged on the drive shaft in the central region of the drive shaft cylindrical stiffening areas, that an inner bearing of the drive shaft with respect to the adjusting shaft on the inner surfaces of the stiffening regions is sought.
- the drive shaft of a continuously variable transmission is designated 1.
- an adjusting shaft 2 is arranged or mounted in the manner explained in more detail below.
- the outer end portions of the drive shaft 1 are rotatably mounted in a conventional manner in a transmission housing with the aid of bearings (not shown).
- the corresponding bearing points of the drive shaft 1 are designated in the figure 1 with L.
- the drive shaft 1 has the already mentioned above stiffening regions 4, which are spaced from each other in the axial direction of the drive shaft 1 in the central region of the drive shaft 1 and contribute to increase the rigidity of the drive shaft 1.
- the stiffening regions 4 each have the shape of cylindrical circular disks, which are arranged concentrically to the axis of rotation of the drive shaft 1. It should be noted that stiffening areas 4 can be provided in different numbers. Also, the provision of only one stiffening areas in the middle region of the adjusting shaft is conceivable. Between the stiffening regions 4, the aforementioned eccentric components 14 of the Exzenterein direction are provided in the apparent manner.
- the adjusting shaft 2 has according to the number and the distance of the stiffening regions 4 axially spaced circumferential grooves 5, in which rolling bearings 6 are located, which are preferably designed according to Figure 5.
- the circumferential grooves 5 are aligned with the stiffening regions 4, when the adjusting shaft 2 is inserted according to Figure 1 in the recess 3 of the drive shaft 1.
- the rolling elements 9 of the roller bearings 6 are on the one hand in each case in contact with the inner running surfaces.
- the rolling bearings 6 are inserted into the circumferential grooves 5 in the recess 3 of the drive shaft 1 before the adjustment shaft 2 is mounted.
- FIG. 5 shows a characteristic and preferred roller bearing 6, which can be inserted in one piece into the circumferential grooves 5, since the rolling bodies 9 are held on a flexible cage 10.
- the cage 10 is interrupted in an opening portion 11, so that it can be expanded for easy and quick assembly of the rolling bearing 6 in a circumferential groove 5.
- roller bearing 6 of FIG. 5 full complement bearings can be provided which have no cage.
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
Description
Antriebsanordnung für ein stufenlos verstellbares Getriebe eines Kraftfahrzeuges Drive arrangement for a continuously variable transmission of a motor vehicle
Die vorliegende Erfindung betrifft eine Antriebsanordnung für ein stufenlos verstellbares Getriebe, insbesondere für ein Kurbel-CVT eines Kraftfahrzeuges.The present invention relates to a drive arrangement for a continuously variable transmission, in particular for a crank CVT of a motor vehicle.
Aus der DE 102 43 535 A1 geht ein stufenlos verstellbares Getriebe eines Kraftfahrzeuges hervor, das im wesentlichen eine Antriebswelle und eine Abtriebswelle umfasst, die parallel zueinander ausgerichtet in einem Getriebegehäuse verdrehbar gelagert sind. Dabei sind diese beiden Wellen über eine an der Antriebswelle vorgesehene Exzentereinrichtung und eine auf der Abtriebswelle angeordnete Freilaufeinrichtung miteinander verbunden. Der Exzentereinrichtung besteht aus mehreren Exzentereinheiten, die axial nebeneinander auf der Antriebswelle angeordnet sind. Die Freilaufeinrichtung besteht aus mehreren Freilaufeinheiten, die auf der Antriebswelle axial nebeneinander angeordnet sind.From DE 102 43 535 A1 discloses a continuously variable transmission of a motor vehicle, which essentially comprises a drive shaft and an output shaft, which are aligned parallel to one another rotatably mounted in a transmission housing. In this case, these two shafts are connected to one another via an eccentric device provided on the drive shaft and a freewheel device arranged on the output shaft. The eccentric consists of a plurality of eccentric units, which are arranged axially next to one another on the drive shaft. The freewheel device consists of several freewheel units, which are arranged axially adjacent to one another on the drive shaft.
Zur Bildung jeder Exzentereinheit weist die Antriebswelle einen gegenüber ihrer Rotationsachse exzentrisch versetzten Führungsbereich auf, auf dessen Mantelfläche ein Exzenterbauteil verdrehbar gelagert ist. Auf dem Exzenterbauteil ist bei der Ausgestaltung des stufenlosen Getriebes als Kurbel-CVT (Continous-Variable-Transmission) die eine Seite wenigstens einer Pleuelstange verdrehbar gelagert.In order to form each eccentric unit, the drive shaft has a guide area offset eccentrically with respect to its axis of rotation, on the lateral surface of which an eccentric component is rotatably mounted. On the Exzenterbauteil one side of at least one connecting rod is rotatably mounted in the configuration of the continuously variable transmission as a crank CVT (Continuous Variable Transmission).
Jedes Exzenterbauteil besitzt eine Ausnehmung zur Aufnahme eines Führungsbereiches der Antriebswelle, wobei um die Ausnehmung eine Innenverzahnung verläuft. Die Innenverzahnung ist dabei auf die Mantelfläche des Führungsbereiches derart abgestimmt, dass das Exzenterbauteil über die Innenverzahnung auf dem Führungsbereich zentriert ist.Each eccentric component has a recess for receiving a guide region of the drive shaft, wherein an internal toothing extends around the recess. The internal toothing is matched to the lateral surface of the guide region in such a way that the eccentric component is centered over the internal toothing on the guide region.
Die Antriebswelle beziehungsweise die Führungsbereiche derselben weisen eine sich in Richtung der Rotationsachse der Antriebswelle erstreckende Ausnehmung auf, in der eine Verstellwelle verdrehbar angeordnet ist. Die Verstellwelle besitzt eine Außenverzahnung, die in die Innenverzahnung der Exzenterbauteile eingreift. Die Verstellwelle ist über die den Kopfkreis der Außenverzahnung bildenden Abschnitte der Außenverzahnung in der Ausnehmung der antreibenden Welle gelagert. Die Führungsbereiche sind derart mondsichelförmig ausgebildet, dass ihre Ausnehmungen über einen bestimmten Winkelbereich offen sind, sodass in diesen Winkelbereichen die Außenverzahnung der Verstellwelle gegenüber der äußeren Man- telfläche der Führungsbereiche radial vorstehen kann, wobei ein Eingriff in die Innenverzahnung des Exzenterbauteiles ermöglicht wird.The drive shaft or the guide areas of the same have a recess extending in the direction of the axis of rotation of the drive shaft, in which an adjustment shaft is rotatably arranged. The adjusting shaft has an outer toothing, which engages in the internal toothing of the eccentric components. The adjusting shaft is mounted in the recess of the driving shaft via the sections of the external toothing forming the tip circle of the external toothing. The guide areas are designed so crescent-shaped that their recesses are open over a certain angular range, so that in these angular ranges, the external toothing of the adjusting against the outer maneuvering telfläche the guide portions can protrude radially, with engagement in the internal teeth of the Exzenterbauteiles is possible.
Die scheibenartig ausgebildeten Führungsbereiche besitzen in Bezug auf ihre zylindrische Mantelfläche eine Mittellinie, die um einen bestimmten Abstand gegenüber der Rotationsachse der Antriebswelle exzentrisch angeordnet ist. Die Exzenterbauteile besitzen in Bezug auf ihre zylindrische Mantelflächen eine Mittellinie, die gegenüber der genannten Mittellinie der Führungsbereiche exzentrisch um einen Abstand so versetzt ist, dass die Exzentrizität der Mittellinie der Exzenterbauteile gegenüber der Rotationsachse der Antriebswelle doppelt so groß ist, wie die Exzentrizität der Mittellinie der Führungsbereiche gegenüber dieser Rotationsachse.The disk-like guide areas have with respect to their cylindrical surface a center line which is arranged eccentrically by a certain distance from the axis of rotation of the drive shaft. The eccentric members have, with respect to their cylindrical surfaces, a centerline which is eccentrically offset from said centerline of the guide portions by a distance such that the eccentricity of the centerline of the eccentric members with respect to the axis of rotation of the drive shaft is twice as large as the eccentricity of the centerline of the actuator Guide areas opposite this axis of rotation.
Durch die Verdrehung der Verstellwelle in der Ausnehmung der Antriebswelle wird das Exzenterbauteil einer Exzentereinheit um die Mittellinie des entsprechenden Führungsbereiches verdreht. Dabei wandert die Mittelinie des Exzenterbauteiles um die Mittellinie des Führungsbereiches, wobei das Ausmaß der Exzentrizität des Exzenterbauteiles in Bezug auf die Rotationsachse der antreibenden Welle verändert wird.Due to the rotation of the adjusting shaft in the recess of the drive shaft, the eccentric component of an eccentric unit is rotated about the center line of the corresponding guide region. In this case, the center line of the Exzenterbauteiles moves around the center line of the guide portion, wherein the extent of the eccentricity of the Exzenterbauteiles is changed with respect to the axis of rotation of the driving shaft.
Die Verstellwelle wird bei den bekannten stufenlosen Kurbel-CVT's üblicherweise ohne Lagerung und mit wenig Spiel in die Antriebswelle eingefügt. Ein Problem besteht dabei darin, dass sich die biegeweiche Antriebswelle unter Last auf der Verstellwelle abstützt, wobei ein erhöhtes Verstellmoment entsteht, das auf eine metallische Reibung beim Einklemmen der Verstellwelle in der axialen Ausnehmung der antreibenden Welle zurückzuführen ist. Da das Verstellmoment dabei erhöht wird, führt dies zu einem erhöhten Strombedarf auf der Seite des die Verstellwelle beim Verstellen drehenden elektrischen Antriebes.The adjusting is usually inserted in the known stepless crank CVT's without storage and with little play in the drive shaft. A problem is that the flexible drive shaft is supported under load on the adjusting shaft, whereby an increased adjusting torque arises, which is due to a metallic friction when clamping the adjusting shaft in the axial recess of the driving shaft. Since the adjusting torque is increased, this leads to an increased power requirement on the side of the adjusting shaft rotating when adjusting electric drive.
Eine Durchbiegung der biegeweichen Antriebswelle kann gemäß einer Patentanmeldung vom gleichen Tage der vorliegenden Patentanmelderin dadurch minimiert werden, dass die mit ihren äußeren Seiten in einem Getriebegehäuse gelagerte Antriebswelle in ihrem mittleren Bereich in Bezug auf das Getriebegehäuse zusätzlich gelagert wird. Außerdem können axial voneinander beabstandete, zylindrische Versteifungsbereiche zwischen den äußeren Lagerstellen der Antriebsachse vorgesehen werden. Dabei geht jedoch wegen der Anordnung der zusätzlichen Lagerstelle axialer Bauraum verloren. Die Aufgabe der vorliegenden Erfindung besteht daher darin, eine Antriebsanordnung für ein stufenlos verstellbares Getriebe eines Kraftfahrzeuges derart auszugestalten, dass eine Durchbiegung der Antriebswelle weitgehend reduziert bzw. vermieden werden kann, ohne dass zusätzlicher axialer Bauraum beansprucht wird.A deflection of the flexurally soft drive shaft can be minimized according to a patent application of the same date of the present patent applicant, that the mounted with their outer sides in a transmission housing drive shaft is additionally stored in its central region with respect to the transmission housing. In addition, axially spaced, cylindrical stiffening areas can be provided between the outer bearing points of the drive axle. However, it is lost because of the arrangement of the additional bearing axial space. The object of the present invention is to design a drive arrangement for a continuously variable transmission of a motor vehicle such that a deflection of the drive shaft can be largely reduced or avoided without additional axial space is claimed.
Diese Aufgabe wird durch eine Antriebsanordnung für ein stufenlos verstellbares Getriebe, insbesondere ein Kurbel-CVT eines Kraftfahrzeuges, mit einer Antriebswelle gelöst, deren äußeren Bereiche in einem Getriebegehäuse gelagert sind. Die Antriebswelle weist eine Ausnehmung auf, in der eine Verstellwelle verdrehbar anordenbar ist, bei deren Verdrehung die Exzenterbauteile einer auf der Antriebswelle angeordneten Exzentereinrichtung stufenlos verstellbar sind. Die Antriebswelle weist in ihrem mittleren Bereich wenigstens einen zylindrischen, scheibenförmigen Versteifungsbereich auf. Die Verstellwelle besitzt in axialer Richtung voneinander beabstandet wenigstens eine Umfangsnut, die dann, wenn die Verstellwelle in der Ausnehmung der Antriebswelle montiert ist, zu dem Versteifungsbereich ausgerichtet ist. In der Umfangsnut sind Rollkörper derart angeordnet, dass sie sich einerseits an der als innere Lauffläche dienenden Bodenfläche der Umfangsnut und andererseits an der als äußere Lauffläche dienenden inneren Fläche des Versteifungsbereiches abstützen.This object is achieved by a drive arrangement for a continuously variable transmission, in particular a crank CVT of a motor vehicle, having a drive shaft whose outer regions are mounted in a transmission housing. The drive shaft has a recess in which an adjusting shaft is rotatably arranged, in the rotation of the Exzenterbauteile an arranged on the drive shaft eccentric are continuously adjustable. The drive shaft has in its central region at least one cylindrical disk-shaped stiffening region. The adjusting shaft has in the axial direction spaced from each other at least one circumferential groove which, when the adjusting shaft is mounted in the recess of the drive shaft, is aligned with the stiffening region. In the circumferential groove rolling elements are arranged such that they are supported on the one hand on the serving as an inner raceway bottom surface of the circumferential groove and on the other hand on serving as the outer race inner surface of the stiffening region.
Der wesentliche Vorteil der erfindungsgemäßen Antriebsanordnung besteht darin, dass eine weitgehend reibungsfreie Lagerung der Verstellwelle in der Ausnehmung der Antriebswelle ermöglicht wird, wobei die innere zylindrische Fläche des wenigstens einen mittleren Versteifungsbereiches der Antriebswelle als Lauffläche für Wälzlager verwendet wird. Besonders vorteilhaft sind zur Erzielung einer reibungsfreien Lagerung der Verstellwelle im mittleren Bereich in axialer Richtung der Verstellwelle mehrere Versteifungsbereiche voneinander beabstandet angeordnet und weist die Verstellweile diesen Versteifungsbereichen entsprechend mehrere Umfangsnuten auf.The essential advantage of the drive arrangement according to the invention is that a largely friction-free mounting of the adjusting shaft in the recess of the drive shaft is made possible, wherein the inner cylindrical surface of the at least one central stiffening region of the drive shaft is used as a running surface for rolling bearings. Particularly advantageous for achieving a friction-free mounting of the adjusting shaft in the central region in the axial direction of the adjusting a plurality of stiffening regions are arranged spaced from each other and has the Verstellweile this stiffening regions according to a plurality of circumferential grooves.
Bei einer vorteilhaften Ausgestaltung der Erfindung werden die Rollkörper in einem ringförmigen Käfig gehalten, der zweckmäßigerweise an einer Stelle durch einen Öffnungsbereich unterbrochen ist. Auf diese Weise ist eine besonders einfache und schnelle Montage der Rollkörper in den Umfangsnuten möglich.In an advantageous embodiment of the invention, the rolling elements are held in an annular cage, which is expediently interrupted at one point by an opening region. In this way, a particularly simple and quick installation of the rolling body in the circumferential grooves is possible.
Die Verstellwelle kann eine in ihrer axialen Richtung verlaufende Außenverzahnung zum Verstellen der Exzenterbauteile aufweisen, wobei diese Außenverzahnung in den Bereichen der Umfangsnuten unterbrochen ist. Die Antriebswelle kann bei einer bevorzugten Anwen- - A - dung der erfindungsgemäßen Antriebsanordnung Teil eines Kurbel-CVT's sein, wobei die Drehung der Antriebswelle über eine an der Antriebswelle angeordnete Exzentereinrichtung auf eine Freilaufeinrichtung einer in einem Getriebegehäuse parallel zur Antriebswelle gelagerten Abtriebswelle übertragen wird, wobei die Exzentereinrichtung auf der Antriebswelle in axialer Richtung voneinander beabstandete Exzenterbauteile umfasst, die jeweils eine Ausnehmung zur Aufnahme eines in Bezug auf die Rotationsachse der Antriebswelle exzentrisch angeordneten Führungsbereiches aufweisen, wobei die Innenverzahnungen der Exzenterbauteile in die Außenverzahnung der Verstellwelle eingreifen. Besonders vorteilhaft ist zwischen jeweils zwei benachbarten Versteifungsbereichen ein Exzenterbauteil angeordnet.The adjusting shaft may have an external toothing extending in its axial direction for adjusting the eccentric components, wherein this external toothing is interrupted in the regions of the circumferential grooves. The drive shaft can be used in a preferred application - A - tion of the drive assembly according to the invention be part of a crank-CVT's, wherein the rotation of the drive shaft is transmitted via an eccentric arranged on the drive shaft to a freewheel device mounted in a gear housing parallel to the drive shaft output shaft, wherein the eccentric on the drive shaft in the axial direction each having a recess for receiving a with respect to the axis of rotation of the drive shaft eccentrically arranged guide region, wherein the internal teeth of the Exzenterbauteile engage in the outer toothing of the adjusting shaft. Particularly advantageously, an eccentric component is arranged between each two adjacent reinforcing regions.
Im Folgenden werden die Erfindung und deren Ausgestaltungen im Zusammenhang mit den Figuren näher erläutert. Es zeigen:In the following, the invention and its embodiments will be explained in more detail in connection with the figures. Show it:
Figur 1 einen Längsschnitt einer Antriebswelle eines bekannten Kurbel CVT's, wobei die Antriebswelle axial voneinander beabstandete Versteifungsbereiche zur Verhinderung einer Durchbiegung aufweist, wobei in einer Ausnehmung der Antriebswelle eine Verstellwelle angeordnet ist und wobei in Unfangsnuten der Verstellwelle sich an den Innenflächen der Versteifungsbereiche und an den Bodenflächen der Umfangsnuten abstützende Wälzlager vorgesehen sind;Figure 1 is a longitudinal section of a drive shaft of a known crank CVT, wherein the drive shaft axially spaced stiffening regions to prevent deflection, wherein in a recess of the drive shaft, an adjusting shaft is arranged and wherein in Unfangsnuten the adjusting shaft on the inner surfaces of the stiffening areas and on the bottom surfaces the circumferential grooves supporting rolling bearings are provided;
Figur 2 eine perspektivische Darstellung der Anordnung der Figur 1 ;Figure 2 is a perspective view of the arrangement of Figure 1;
Figur 3 eine perspektivische Darstellung der Verstellwelle der erfindungsgemäßenFIG. 3 is a perspective view of the adjusting shaft of the invention
Antriebsanordnung, wobei die Wälzlager nicht dargestellt sind, um die als Lagerlaufbahnen dienenden Bodenflächen der Umfangsnuten sichtbar zu machen;Drive arrangement, wherein the rolling bearings are not shown in order to make visible as the bearing raceways bottom surfaces of the circumferential grooves visible;
Figur 4 die Verstellwelle der Figur 3 mit den in den Umfangsnuten angeordnetenFigure 4, the adjusting shaft of Figure 3 with arranged in the circumferential grooves
Wälzlagern;bearings;
Figur 5 eine perspektivische Darstellung eines Wälzlagers mit flexiblem Käfig;Figure 5 is a perspective view of a rolling bearing with flexible cage;
Figur 6 in perspektivischer Darstellung eine Antriebswelle, wobei die an denFigure 6 is a perspective view of a drive shaft, wherein the at
Innenflächen der Versteifungsbereiche anliegenden Wälzlager teilweise sichtbar sind; Figur 7 eine durch die Linien VII-VII der Figur 4 angedeutete Seitenansicht derInner surfaces of the stiffening areas adjacent rolling bearings are partially visible; FIG. 7 shows a side view, indicated by the lines VII-VII of FIG
Verstellwelle; undadjusting shaft; and
Figur 8 eine durch die Linien VIII-VIII der Figur 6 angedeutete Seiteansicht derFIG. 8 shows a side view, indicated by the lines VIII-VIII in FIG
Antriebsanordnung.Drive arrangement.
Zu der Erfindung führten die folgenden Überlegungen. Eine bauraumsparende und reibungsarme Lagerung der Antriebswelle auf der Verstellwelle lässt sich unter Ausnutzung von an der Antriebswelle im mittleren Bereich der Antriebswelle angeordneten zylindrischen Versteifungsbereichen dadurch erzielen, dass eine innere Lagerung der Antriebswelle in Bezug auf die Verstellwelle an den Innenflächen der Versteifungsbereiche angestrebt wird.The following considerations led to the invention. A space-saving and low-friction mounting of the drive shaft on the adjusting shaft can be achieved by utilizing arranged on the drive shaft in the central region of the drive shaft cylindrical stiffening areas, that an inner bearing of the drive shaft with respect to the adjusting shaft on the inner surfaces of the stiffening regions is sought.
In der Figur 1 , ist die Antriebswelle eines stufenlosen Getriebes mit 1 bezeichnet. In einer axialen Ausnehmung 3 der Antriebswelle 1 ist eine Verstellwelle 2 in der nachfolgend näher erläuterten Weise angeordnet bzw. gelagert. Die äußeren Endbereiche der Antriebswelle 1 sind in an sich bekannter Weise in einem Getriebegehäuse mit der Hilfe von Lagern (nicht dargestellt) drehbar gelagert. Die entsprechenden Lagerstellen der Antriebswelle 1 sind in der Figur 1 mit L bezeichnet.In the figure 1, the drive shaft of a continuously variable transmission is designated 1. In an axial recess 3 of the drive shaft 1, an adjusting shaft 2 is arranged or mounted in the manner explained in more detail below. The outer end portions of the drive shaft 1 are rotatably mounted in a conventional manner in a transmission housing with the aid of bearings (not shown). The corresponding bearing points of the drive shaft 1 are designated in the figure 1 with L.
Die Antriebswelle 1 weist die eingangs bereits erwähnten Versteifungsbereiche 4 auf, die in axialer Richtung der Antriebswelle 1 voneinander beabstandet im mittleren Bereich der Antriebswelle 1 angeordnet sind und zur Erhöhung der Steifigkeit der Antriebswelle 1 beitragen. Die Versteifungsbereiche 4 weisen jeweils die Form von zylindrischen Kreisscheiben auf, die konzentrisch zur Rotationsachse der Antriebswelle 1 angeordnet sind. Es wird darauf hingewiesen, dass Versteifungsbereiche 4 in unterschiedlichen Anzahlen vorgesehen werden können. Auch ist die Vorsehung nur eines Versteifungsbereiche im mittleren Bereich der Verstellwelle denkbar. Zwischen den Versteifungsbereichen 4 sind in der ersichtlichen Weise die eingangs genannten Exzenterbauteile 14 der Exzenterein richtung vorgesehen.The drive shaft 1 has the already mentioned above stiffening regions 4, which are spaced from each other in the axial direction of the drive shaft 1 in the central region of the drive shaft 1 and contribute to increase the rigidity of the drive shaft 1. The stiffening regions 4 each have the shape of cylindrical circular disks, which are arranged concentrically to the axis of rotation of the drive shaft 1. It should be noted that stiffening areas 4 can be provided in different numbers. Also, the provision of only one stiffening areas in the middle region of the adjusting shaft is conceivable. Between the stiffening regions 4, the aforementioned eccentric components 14 of the Exzenterein direction are provided in the apparent manner.
Die Verstellwelle 2 weist entsprechend der Anzahl und dem Abstand der Versteifungsbereiche 4 axial voneinander beabstandete Umfangsnuten 5 auf, in denen sich Wälzlager 6 befinden, die vorzugsweise gemäß Figur 5 ausgestaltet sind. Die Umfangsnuten 5 sind zu den Versteifungsbereichen 4 ausgerichtet, wenn die Verstellwelle 2 gemäß Figur 1 in die Ausnehmung 3 der Antriebswelle 1 eingesetzt ist. In der insbesondere aus der Figur 1 ersichtlichen Weise liegen die Rollkörper 9 der Wälzlager 6 einerseits jeweils an den als innere Laufflächen dienen- den Bodenflächen 8 der Umfangsnuten 5 und andererseits an den als äußere Laufflächen dienenden inneren zylindrischen Flächen 13 der Versteifungsbereiche 4 an.The adjusting shaft 2 has according to the number and the distance of the stiffening regions 4 axially spaced circumferential grooves 5, in which rolling bearings 6 are located, which are preferably designed according to Figure 5. The circumferential grooves 5 are aligned with the stiffening regions 4, when the adjusting shaft 2 is inserted according to Figure 1 in the recess 3 of the drive shaft 1. In the manner shown in particular in FIG. 1, the rolling elements 9 of the roller bearings 6 are on the one hand in each case in contact with the inner running surfaces. the bottom surfaces 8 of the circumferential grooves 5 and on the other hand on the outer cylindrical surfaces serving as inner cylindrical surfaces 13 of the stiffening regions 4 at.
Die Figur 3 zeigt die Verstellwelle 2, wobei die axiale Außenverzahnung 7 derselben, die, wie eingangs erläutert, in die Innenverzahnung der Exzenterbauteile eingreift, mit 7 bezeichnet ist. Diese Außenverzahnung 7 ist im Bereich der Umfangsnuten 5 unterbrochen.3 shows the adjusting shaft 2, wherein the axial outer toothing 7 thereof, which, as explained above, engages in the internal toothing of the Exzenterbauteile is denoted by 7. This external toothing 7 is interrupted in the region of the circumferential grooves 5.
Gemäß Figur 4 werden die Wälzlager 6 vor der Montage der Verstellwelle 2 in der Ausnehmung 3 der Antriebswelle 1 in die Umfangsnuten 5 eingesetzt.According to FIG. 4, the rolling bearings 6 are inserted into the circumferential grooves 5 in the recess 3 of the drive shaft 1 before the adjustment shaft 2 is mounted.
Die Figur 5 zeigt ein charakteristisches und bevorzugtes Wälzlager 6, das einteilig in die Umfangsnuten 5 einsetzbar ist, da die Rollkörper 9 an einem flexiblen Käfig 10 gehalten sind. Der Käfig 10 ist in einem Öffnungsbereich 11 unterbrochen, sodass er zur einfachen und schnellen Montage des Wälzlagers 6 in einer Umfangsnut 5 aufgeweitet werden kann.FIG. 5 shows a characteristic and preferred roller bearing 6, which can be inserted in one piece into the circumferential grooves 5, since the rolling bodies 9 are held on a flexible cage 10. The cage 10 is interrupted in an opening portion 11, so that it can be expanded for easy and quick assembly of the rolling bearing 6 in a circumferential groove 5.
Es wird darauf hingewiesen, dass anstelle des Wälzlagers 6 der Figur 5 auch vollrollige Lager vorgesehen werden können, die keinen Käfig besitzen. It should be noted that instead of the roller bearing 6 of FIG. 5, full complement bearings can be provided which have no cage.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Antriebswelle1 drive shaft
2 Verstellwelle2 adjusting shaft
3 axiale Ausnehmung3 axial recess
4 Versteifungsbereich4 stiffening area
5 Umfangsnut5 circumferential groove
6 Wälzlager6 rolling bearings
7 Außenverzahnung7 external toothing
8 Bodenfläche8 floor space
9 Rollkörper9 rolling bodies
10 Käfig10 cage
11 Öffnungsbereich11 opening area
12 Rotationsachse12 rotation axis
13 Fläche13 area
14 Exzenterbauteil14 eccentric component
L Lagerstelle L bearing point
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112009001762T DE112009001762A5 (en) | 2008-07-21 | 2009-07-06 | Drive arrangement for a continuously variable transmission of a motor vehicle |
| JP2011519028A JP5586600B2 (en) | 2008-07-21 | 2009-07-06 | Drive device for continuously variable transmission for automobile |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008033950 | 2008-07-21 | ||
| DE102008033950.4 | 2008-07-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2010009697A1 true WO2010009697A1 (en) | 2010-01-28 |
Family
ID=41181065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2009/000938 Ceased WO2010009697A1 (en) | 2008-07-21 | 2009-07-06 | Drive system for an infinitely variable transmission of a motor vehicle |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5586600B2 (en) |
| DE (2) | DE102009031793A1 (en) |
| WO (1) | WO2010009697A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013087932A (en) * | 2011-10-21 | 2013-05-13 | Honda Motor Co Ltd | Continuously variable transmission |
| US20140033841A1 (en) * | 2011-06-30 | 2014-02-06 | Honda Motor Co., Ltd. | Four-joint link type continuously variable transmission |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6163119B2 (en) * | 2014-02-07 | 2017-07-12 | 本田技研工業株式会社 | Driving force transmission device for vehicle |
| CN105003632B (en) * | 2015-07-10 | 2017-07-18 | 席昊 | A kind of mechanically direct buncher |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10243535A1 (en) * | 2001-09-26 | 2003-04-24 | Luk Lamellen & Kupplungsbau | Hybrid drive device for motor vehicle such as tourism vehicle, has engine and electric motor that can be connected to drive connection by coupling so that motor is coupled with drive side of gearbox and/or with engine |
| WO2004097258A1 (en) * | 2003-04-29 | 2004-11-11 | Company Ex As | A continuously variable transmission |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60194660U (en) * | 1984-06-06 | 1985-12-25 | 相生精機株式会社 | 2-piece plate cam that allows you to change the opening angle of the cam mount |
-
2009
- 2009-07-06 DE DE102009031793A patent/DE102009031793A1/en not_active Withdrawn
- 2009-07-06 DE DE112009001762T patent/DE112009001762A5/en not_active Withdrawn
- 2009-07-06 JP JP2011519028A patent/JP5586600B2/en not_active Expired - Fee Related
- 2009-07-06 WO PCT/DE2009/000938 patent/WO2010009697A1/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10243535A1 (en) * | 2001-09-26 | 2003-04-24 | Luk Lamellen & Kupplungsbau | Hybrid drive device for motor vehicle such as tourism vehicle, has engine and electric motor that can be connected to drive connection by coupling so that motor is coupled with drive side of gearbox and/or with engine |
| WO2004097258A1 (en) * | 2003-04-29 | 2004-11-11 | Company Ex As | A continuously variable transmission |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140033841A1 (en) * | 2011-06-30 | 2014-02-06 | Honda Motor Co., Ltd. | Four-joint link type continuously variable transmission |
| US9121483B2 (en) * | 2011-06-30 | 2015-09-01 | Honda Motor Co., Ltd. | Four-joint link type continuously variable transmission |
| JP2013087932A (en) * | 2011-10-21 | 2013-05-13 | Honda Motor Co Ltd | Continuously variable transmission |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5586600B2 (en) | 2014-09-10 |
| JP2011528777A (en) | 2011-11-24 |
| DE112009001762A5 (en) | 2011-04-21 |
| DE102009031793A1 (en) | 2010-01-28 |
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