DE102020125965B4 - Holding device for a damper device in a transmission housing of a belt transmission - Google Patents

Abstract

Holding device (1) for a damper device (2) in a transmission housing (3) of a belt transmission (4), having at least the following components: - a bearing bridge (5) with a pivot axis (6) for a bearing mount (7) of a damper device (2 );- a retaining bridge (8) which comprises a positioning element (9) and a bearing element (10), the positioning element (9) for, in cooperation with a receiving element (11) of the transmission housing (3) of the belt transmission (4), positioning of the bearing bracket (5) relative to said gear housing (3);- an axial securing element (12,13) for axially securing the holding device (1) within said gear housing (3) by means of axial support on said gear housing (3). 3); and- an axial bracing element (14) connected to the retaining bridge (8) for, by means of axial support on the said transmission housing (3) and by means of the axial securing element (12, 13), positioning the bearing bridge (5) without play, wherein the axial bracing element (14 ) is comprised by the retaining bridge (8), characterized in that the axial bracing element (14) is formed in the manner of a tab, extending radially from the retaining bridge (8), and comprises two tabs (19, 20) lying opposite one another.

Description

The invention relates to a holding device for a damper device in a transmission housing of a belt transmission, a transmission housing with such a holding device, a belt transmission with such a transmission housing for a drive train.

Belt transmissions, for example CVTs, are known from the prior art, in which, for damping the belt or at least one strand of the belt, a damper device, for example a slide rail (contact on both sides) or a slide shoe or a slide guide ( one-sided, mostly inside system) is used. Such a damper device used on a belt is for example in DE 100 17 005 A1 disclosed. Such a damper device has a bearing mount, by means of which the damper device is accommodated in a pivotable manner on a holding device, also known as a pivoting means (or more specifically referred to as a holding tube). For this purpose, the holding device comprises a bearing bridge which extends to or up to the axially opposite housing wall (for example the housing cover) and in the latter case rests axially there. It is always desirable to have less installation space and low noise emissions, especially in the case of speed settings in a drive train of a motor vehicle that are less comprehensible due to automation, for example in connection with hybridized drives.

From the disclosure document DE 10 2018 103 480 A1 discloses a holding device for a damper device in a transmission housing of a continuously variable transmission with a bearing bridge with a pivot axis for a bearing mount of a damper device, the retaining bridge comprising a positioning element that interacts with a receiving element of a transmission housing and a bearing element.

Proceeding from this, the object of the present invention is to at least partially overcome the disadvantages known from the prior art. The features according to the invention result from the independent claims, for which advantageous configurations are shown in the dependent claims. The features of the claims can be combined in any technically meaningful way, whereby the explanations from the following description and features from the figures can also be used for this purpose, which include additional configurations of the invention.

• - eine Lagerbrücke mit einer Schwenkachse für eine Lageraufnahme einer Dämpfereinrichtung;
• - eine Haltebrücke, welche ein Positionierelement und ein Lagerelement umfasst, wobei das Positionierelement zum, im Zusammenwirken mit einem Aufnahmeelement eines Getriebegehäuses eines Umschlingungsgetriebes, Positionieren der Lagerbrücke relativ zu dem genannten Getriebegehäuse eingerichtet ist;
• - ein Axialsicherungselement zum, mittels axialem Abstützen an dem genannten Getriebegehäuse, axialen Sichern der Halteeinrichtung innerhalb des genannten Getriebegehäuses; und
• - ein mit der Haltebrücke verbundenes Axialverspannelement zum, mittels axialem Abstützen an dem genannten Getriebegehäuse und mittels des Axialsicherungselements, axial spielfrei Stellen der Lagerbrücke.

The invention relates to a holding device for a damper device in a transmission housing of a belt transmission, having at least the following components:

• - A bearing bracket with a pivot axis for a bearing mount of a damper device;
• - a retaining bridge, which comprises a positioning element and a bearing element, wherein the positioning element is set up for, in cooperation with a receiving element of a transmission housing of a belt transmission, positioning the bearing bridge relative to said transmission housing;
• - an axial securing element for, by means of axial support on said gear housing, axially securing the holding device within said gear housing; and
• - An axial bracing element connected to the retaining bridge for, by means of axial support on the mentioned transmission housing and by means of the axial securing element, axially free of play positions of the bearing bridge.

In this case, the axial bracing element is formed like a strap, extending radially from the retaining bridge.
and preferably comprises two opposing tabs.

The axial bracing element is in the form of a lug, so that such a lug extends outwards from the retaining bridge in a radial direction, for example the (possibly rigid) transverse direction. In a preferred embodiment, a predetermined angular alignment can be ensured at the same time by means of the axial bracing element (see below). It is then advantageous to make the tab wider in a circumferential direction or transverse direction to the radial direction of the extent of the tab than in the (resilient) axial direction. This creates a large area of inertia against twisting. The tab is preferably formed in one piece with the retaining bridge.

The holding device is primarily characterized in that the axial bracing element is encompassed by the holding bridge.

In the following, reference is made to the pivot axis mentioned when the axial direction, radial direction or the direction of rotation and corresponding terms are used without any explicit indication to the contrary. The transverse direction with reference to the pivot axis defined by the bearing bracket is defined with reference to a single radial direction (e.g. rest position, for example at a medium gear ratio, for example a gear ratio of 1 in a symmetrical embodiment of the belt drive). The transverse direction with respect to the damping devices is defined to move with it, specifically perpendicular to the plane formed by the abutment of the damping device. The running direction is correspondingly rigid or always defined as moving along transversely to the transverse direction and the axial direction. In a preferred embodiment, the rigid and co-moving transverse direction and running direction are congruent with the same size effective circles of the conical pulley pairs of a belt drive. Unless explicitly stated otherwise, ordinal numbers used in the description above and below only serve to clearly distinguish them and do not reflect any order or ranking of the components referred to. An ordinal number greater than one does not mean that another such component must necessarily be present.

As explained above, the holding device proposed here is set up such that a damping device for the strand of a belt means of a belt-type transmission is pivotably mounted in such a way that the damping device can follow the movement of the strand to be damped. The holding device comprises a bearing bracket on which the bearing mount of the damper device is accommodated in a pivotable manner. Such a bearing bridge has a (theoretical) pivot axis about which the damper device can be pivoted. It should be pointed out at this point that the damper device in one embodiment does not execute a purely rotational movement about the pivot axis, but also a translational movement, resulting in an oval pivot movement. In such an embodiment, the bearing mount of the damper device is set up for a (jointly moved) transverse movement, for example as an elongated hole, preferably U-shaped with an assembly opening open in the transverse direction.

The retaining bridge is an axially straight or deflected component, which can also be described as a retaining tube, for example, which is set up, for example, to conduct a coolant and/or a lubricant. The retaining bridge designed as a deflected component is formed, for example, with two sections that are axial to one another (that is to say parallel to one another), the two sections preferably being connected to one another with an S-shaped intermediate section. The section of the retaining bridge on the housing side comprises the positioning element and the section on the bearing bridge side comprises a bearing element. As mentioned above, the positioning element is set up for positioning the bearing bridge relative to the transmission housing in cooperation with a receiving element of a transmission housing of a continuously variable transmission. For example, four of the six degrees of freedom are restricted by means of the positioning element, preferably solely by means of this interaction with a sufficiently small amount of play in the operating state. One of the two remaining degrees of freedom is torsion about the pivot axis. The other free degree of freedom is the axial position, which is restricted solely by the axial securing element or is only restricted in the operating state in interaction with the axial securing element. The bearing element of the retaining bridge is set up for connection to the bearing bridge and the (separate) axial securing element or connected to the bearing bridge and the (enclosed) axial securing element or formed in one piece (see below).

The transmission housing, in which the holding device can be inserted, comprises a (first) housing wall (e.g. a housing pot) and an axially opposite (second) housing wall (e.g. a housing cover), which are arranged axially opposite one another on the side of a transmission space for a belt transmission. In one embodiment of the transmission housing, only a housing pot and a housing cover are provided as wall components. One of the housing walls (preferably the housing pot) of the transmission housing has a receiving element, for example a depression or an elevation, which is received by a corresponding positioning element of the retaining bridge or in which this corresponding positioning element of the retaining bridge is received. In one embodiment, for example, the positioning element is designed as a pin-like extension and is accommodated in a receiving element designed as an opening in the relevant housing wall. In one embodiment, the gearbox housing is of conventional design.

Furthermore, the holding device has an axial securing element, by means of which the holding device can be fixed axially in a transmission housing. In one embodiment, the holding device is secured axially directly or indirectly to one of the two axially opposite housing walls. In one embodiment, the positioning element and the axial securing element are formed integrally with one another. The axial securing element and the positioning element are preferably always formed separately from one another, with preference being given to at least one of the two elements is formed in one piece with the at least one bearing bridge or can be preassembled.

Furthermore, an axial bracing element is connected to the retaining bridge, preferably in one piece. By means of the axial bracing element, an elastic bracing force is generated in the axial direction in such a way that the axial securing element is positioned without axial play in interaction with one of the housing walls. The retaining bridge is thus positioned in the transmission housing in an axially well-defined manner, specifically by means of the axial securing element.

In one embodiment, an axial stop is provided axially on one side or axially on both sides of the bearing bridge, by means of which an accommodated damping device is secured axially, for example cannot be moved or can only be moved over a predetermined axial path. Because the retaining bridge is free of play, the axial position of at least one axial stop connected to the retaining bridge (preferably in one piece) is also well defined. A well-defined position includes manufacturing tolerances and/or assembly tolerances, but no play. In a preferred embodiment, the tolerance chain is short, for example formed solely by the axial securing element and its contact point(s) (with the transmission housing and/or the retaining bridge).

Because no screw connection is used in this embodiment to ensure that the bearing bridge is installed in the correct position relative to the transmission housing (at least to the transmission housing), no or only a small amount of installation space is required radially outside of the holding device (compared to an embodiment with a screw connection). . Since no additional material connection is formed, non-destructive disassembly is given, and assembly is simple and inexpensive. By not only forming a material connection (as an alternative to a form fit), assembly that is in the correct position can be ensured and, moreover, operational reliability over a desired service life can be easily designed.

It is further proposed in an advantageous embodiment of the holding device that the axial securing element is formed separately from the retaining bridge and includes a rotation securing element, and
the bearing element of the retaining bridge and/or a corresponding housing wall comprises a corresponding counter-securing element,
wherein the anti-rotation element and the corresponding counter-locking element ensure that the bearing bridge is installed in the correct position relative to the gear housing,
wherein preferably the axial securing element is connected by means of the axial bracing element with no axial play to the bearing element and oppositely to the said transmission housing.

In one embodiment, preferably when the bearing bridge and/or an axial stop is formed in one piece with the axial securing element, the (separate) axial securing element is mounted at the correct angle relative to the transmission housing by means of the anti-rotation element, preferably only at the correct angle, and preferably against a relative Secured against twisting. The anti-rotation element is formed, for example, by means of caulking and/or an edge and counter-edge. In one embodiment, such an edge is introduced, for example, as a groove or in the manner of a groove (for example with an axial main extent or as a secant) in a region of the axial securing element that is round about the pivot axis or has insufficient edges. For example, such an edge is formed in the case of a jump in diameter (for example, a shoulder in the case of a round cross section). The opposite edge is formed correspondingly, preferably according to a key-lock principle.

For example, the (separate) axial securing element is axially lengthened compared to the bearing bracket and can be inserted or plugged with (at least one end piece) of this axial extension into the bearing element of the retaining bridge or into a corresponding plug-in element (see below) at the correct angle. For example, such a measure to ensure assembly at the correct angle, and preferably to secure against relative twisting, is formed in the manner of an open-end wrench and a nut.

In one embodiment, the corresponding counter-securing element is formed in the bearing element, whereby the angular orientation of the bearing element of the retaining bridge is secured. In one embodiment, the corresponding counter-fuse element is additionally or alternatively formed on the fuse-side housing wall. In this embodiment, if the bearing bridge is also formed on or (in one piece) by the (separate) axial securing element, no further anti-rotation element is preferably provided for the retaining bridge and, for example, the retaining bridge can be mounted in the transmission housing with an undefined rotational position and/or freely rotatably.

It is also proposed in an advantageous embodiment of the holding device that the axial securing element is encompassed by the holding bridge, and preferably with the named receiving element of the transmission housing for the Positioning element for axially securing the holding device is arranged to cooperate.

In this embodiment, the retaining bridge is secured axially by means of an included axial securing element, with a clearance-free setting also being effected here by means of the axial bracing element. In a preferred embodiment, the (enclosed) axial securing element is formed in one piece with the retaining bridge, for example in the region of the positioning element. Such an included axial securing element is, for example, a bolt connection, a bayonet lock and/or a snap lock, with the receiving element of the relevant housing wall preferably forming the axial counter-stop for the positioning element of the retaining bridge. Such a counter-stop is then correspondingly a (possibly oblong) hole for receiving a safety bolt, a bayonet link for a bayonet spring or a receiving hole for a snap hook, or always vice versa.

It is also proposed in an advantageous embodiment of the holding device that the axial bracing element is formed in a purely elastically supporting manner,
and is preferably formed in one piece with the retaining bridge.

It is proposed here that the axial bracing element is installed and put into operation without plastic deformation. The axial bracing element is thus supported in a purely elastic manner on the corresponding housing wall and thus generates the desired elastic bracing force, by means of which the holding device is set free of axial play.

In a preferred embodiment, such an axial bracing element is formed in one piece with the retaining bridge and is formed, for example, as a solid spring. In one embodiment, the axial bracing element is partially formed in one piece with the retaining bridge in such a way that a (rigid) part of the axial bracing element forms an axially effective stop, for example a collar, on the retaining bridge, and a (deflecting) part of the axial bracing element is rubber-elastic or spring-elastic and is clamped in the mounted state between the said stop and the corresponding housing wall.

In a preferred embodiment, two mutually opposite lugs are provided radially or transversally on both sides of the retaining bridge, so that tilting of the retaining bridge is prevented with this simple means. For this purpose, the two tabs are particularly preferably formed identically.

It is also proposed in an advantageous embodiment of the holding device that the axial bracing element also ensures a predetermined angular alignment of the bearing bracket in cooperation with the named gear housing,
preferably by means of said receiving element.

For some applications, it is advantageous if the bearing bracket is aligned rigidly, ie not rotatable, about the pivot axis when it is used in a transmission housing. For example, an axial stop is provided axially on one side or axially on both sides of the bearing bridge, by means of which an accommodated damping device is secured axially, for example cannot be moved or can only be moved over a predetermined axial path. An axial stop of this type is designed with a sufficient radial extent exclusively in a single radial direction or in a radial direction range, for example the transverse direction, for optimum use of the installation space. In such an embodiment of the bearing bridge, the use of an anti-rotation device for the retaining bridge is advantageous.

According to the embodiment proposed here, the axial bracing element is set up to ensure that the bearing bracket is mounted in the transmission housing at the correct angle, preferably only at the correct angle. During further operation, the axial bracing element is preferably set up to prevent (at least excessive) relative rotation of the bearing bracket in the transmission housing. The axial bracing element interacts with a corresponding securing element of the transmission housing.

In a preferred embodiment, the axial bracing element interacts with a corresponding securing element of the transmission housing in a purely form-fitting manner, also in the circumferential direction, for assembly at the correct angle or against twisting.

The corresponding securing element is preferably formed in one piece from the receiving element, for example from that part of the receiving element in which the positioning element is received and/or from that part of the receiving element of the transmission housing which is designed to absorb the axial bracing force of the axial bracing element.

Because no screw connection is used in this embodiment to secure the bearing bracket against twisting about the pivot axis relative to the gear housing (at least to the gear housing), radially outside the holding device there is no or only a small amount (compared to an embodiment with a screw connection). ) installation space required. Since no additional material connection is formed, non-destructive disassembly is given, and assembly is simple and inexpensive. By not only forming a material connection (as an alternative to a form fit) (as a safeguard against twisting of the bearing bridge), assembly at the correct angle can be ensured and, moreover (as a safeguard against twisting), operational reliability over a desired service life can be easily designed. In some applications, a torque acting on the bearing bridge about the pivot axis is so low that rotation of the bearing bridge can be prevented with a very small counterforce. Then a rotation lock designed purely as an assembly aid by means of the axial bracing element for securing against twisting during operation of the damper device in a belt drive is always adequately designed. In another embodiment, an additional measure is used to prevent the bearing bracket from twisting, for example frictionally by caulking the receiving element (of the transmission housing) for the positioning element or the securing element of the transmission housing.

• - eine erste Gehäusewand;
• - eine zweite Gehäusewand, wobei die erste Gehäusewand und die zweite Gehäusewand einander axial-gegenüberliegend seitlich eines Getrieberaums für ein Umschlingungsgetriebe angeordnet sind; und
• - ein Aufnahmeelement für die Haltebrücke einer Halteeinrichtung nach einer Ausführungsform gemäß der obigen Beschreibung, wobei die Lagerbrücke der Halteeinrichtung zum Lagern einer Dämpfereinrichtung für ein Umschlingungsmittel des Umschlingungsgetriebes eingerichtet ist,

wobei das Aufnahmeelement mit einer der Gehäusewände fest verbunden ist.According to a further aspect, a transmission housing is proposed, having at least the following components:

• - a first housing wall;
• - A second housing wall, wherein the first housing wall and the second housing wall are arranged axially opposite one another on the side of a gear chamber for a belt transmission; and
• - a receiving element for the holding bridge of a holding device according to an embodiment according to the above description, wherein the bearing bridge of the holding device is set up to support a damper device for a belt mechanism of the belt transmission,

wherein the receiving element is firmly connected to one of the housing walls.

The transmission housing is set up for a belt transmission as explained in more detail initially and/or below, in accordance with a description with reference to the holding device described above and below. The holding device that can be accommodated by means of the receiving element of the transmission housing is set up, as described there, for pivotably receiving a damper device, with the damper device being pivotable as described above.

The transmission housing comprises a first housing wall (for example a housing pot) and an axially opposite second housing wall (for example a housing cover), which are arranged axially opposite one another on the side of a transmission space for a belt transmission. In one embodiment of the transmission housing, only a housing pot and a housing cover are provided as wall components. At least one of the housing walls of the transmission housing has a receiving element, for example a depression or an elevation, which is received by a corresponding positioning element and/or axial securing element of the holding device or in which this corresponding positioning element or axial securing element of the holding device is received. In one embodiment, for example, the bearing bracket is accommodated with a pin-like extension as a positioning element in an opening in the relevant housing wall. The receiving element is, for example, fixed to the housing wall in question or formed in one piece with the housing wall in question. In one embodiment, the housing wall in question is a cast part and the receiving element is also primary formed during casting.

It is also proposed in an advantageous embodiment of the transmission housing that the receiving element of one of the housing walls includes a plug-in receptacle for the positioning element of the retaining bridge and a counter bearing for the axial bracing element of the retaining bridge.
the counter bearing preferably at the same time comprising at least one safety stop for ensuring a predetermined angular alignment of the bearing bracket.

In this embodiment, the receiving element is set up both for the assembly of the positioning element and as a counter bearing for the axial bracing element. For the assembly of the positioning element, the receiving element is designed as a plug-in receptacle into which or onto which the positioning element of the holding bridge can be plugged. In one embodiment, the plug-in receptacle and the abutment are each designed as axially projecting and radially (at least partially) spaced pegs, these separate pegs being connected to one another or solely to the (possibly flat) wall-forming portion of the corresponding housing wall.

In a preferred embodiment, at the same time at least one safety stop is formed by the counter bearing (formed, for example, as a separate pin) for absorbing the axial bracing force of the axial bracing element. The safety stop is designed to ensure a predetermined angular alignment of the bearing bridge in cooperation with the axial bracing element, which is formed, for example, like a strap. In one embodiment, the abutment comprises a plurality of pegs of the relevant housing wall, with preferably only one of the pegs comprising a safety stop for both possible directions of rotation.

It is also proposed in an advantageous embodiment of the transmission housing that the respective axially opposite housing wall is set up for axially supporting the separate axial securing element according to an embodiment as described above, with the axially opposite housing wall preferably comprising an insertion element, by means of which the separate Axialsicherungselement is supported radially to the axially-opposite housing wall.

In this advantageous embodiment, that housing wall which is arranged axially opposite the housing wall accommodating the retaining bridge is set up to absorb the axial (counter) bracing force of the axial bracing element, which is transmitted by the (separate) axial securing element. The separate axial securing element is thus clamped between the retaining bridge and the axially opposite housing wall. In this advantageous embodiment, an axial stop is preferably formed on the side of the bearing bridge, and particularly preferably also the bearing bridge, comprised by the separate axial securing element, preferably in one piece.

In a preferred embodiment, an insertion element for the separate axial securing element is formed on this axially opposite housing wall, into which or onto which the separate axial securing element can be plugged. This creates a transversal, preferably radial, positional securing for the separate axial securing element, so that preferably together with the positioning element, the holding device completely bridges the axial extent of the gear chamber enclosed by the gear housing and the holding device is also supported on both sides.

• - eine Getriebeeingangswelle mit einem ersten Kegelscheibenpaar;
• - eine Getriebeausgangswelle mit einem zweiten Kegelscheibenpaar;
• - ein Umschlingungsmittel, mittels welchem das erste Kegelscheibenpaar mit dem zweiten Kegelscheibenpaar drehmomentübertragend verbunden ist;
• - eine Dämpfereinrichtung, welche auf der Lagerbrücke einer Halteeinrichtung nach einer Ausführungsform gemäß der obigen Beschreibung gelagert ist; und
• - ein Getriebegehäuse, bevorzugt nach einer Ausführungsform gemäß der obigen Beschreibung,

wobei die Dämpfereinrichtung dämpfend an einem Trum des Umschlingungsmittels anliegt.According to a further aspect, a belt transmission for a drive train is proposed, having at least the following components:

• - A transmission input shaft with a first pair of conical pulleys;
• - A transmission output shaft with a second pair of conical pulleys;
• - A belt means, by means of which the first pair of conical pulleys is connected to the second pair of conical pulleys in a torque-transmitting manner;
• - A damping device, which is mounted on the bearing bridge of a holding device according to an embodiment according to the above description; and
• - a gear housing, preferably according to an embodiment according to the above description,

wherein the damping device rests against a strand of the belt means in a damping manner.

With the belt transmission proposed here, a torque can be transmitted from a transmission input shaft to a transmission output shaft and vice versa, increasing or decreasing, with the transmission being steplessly adjustable at least in certain areas. A belt transmission is, for example, what is known as a CVT [continuous variable transmission] with a traction device or with a push belt. The belt means is, for example, a multi-link chain. The belt is moved in opposite directions on conical disk pairs from radially inside to radially outward and vice versa, so that a different effective circle is set on a respective conical disk pair. The ratio of the active circles results in a translation of the torque to be transmitted. The two active circuits are connected to one another by means of an upper and a lower strand, namely a load strand, also known as a tight strand or a push strand, and a slack strand of the belting device.

In the ideal state, the strands of the belt means form a tangential alignment between the two active circles. This tangential orientation is superimposed by induced shaft vibrations, caused for example by the finite division of the belt and as a result of leaving the active circle prematurely due to the escape acceleration of the belt.

The damper device is set up to rest with its at least one sliding surface on a corresponding contact surface of a strand to be damped, for example the load strand gene that such shaft vibrations are suppressed or at least dampened. Furthermore, a transverse guide is also provided for one application, that is to say in a plane parallel to the looping circle formed by the looping means, a guide surface on one side or on both sides. A sliding channel is then formed in the case of a sliding rail with an outer sliding surface and an inner sliding surface. The strand is thus guided in a plane parallel to the sliding surfaces and the running direction of the strand lies in this parallel plane. For the best possible damping, the sliding surface is designed to fit as closely as possible to the strand of the belt. Alternatively, the damper device is fixed axially and the guided run is (axially) movable relative thereto.

So that the damper device can follow the alignment of the run, a holding device is provided as a pivot bearing with a pivot axis defined by it, on which the damper device sits with its bearing mount and can thus perform the (e.g. oval, see above) pivoting movement according to the previous description.

The components of the belt transmission are usually surrounded and/or supported by a transmission housing. For example, the holding device described herein for the bearing mount is fastened to the transmission housing or at least one of the housing walls lying axially opposite one another. The transmission input shaft and the transmission output shaft extend into the transmission housing from the outside and are preferably supported on the transmission housing by means of (e.g. roller) bearings. The pairs of conical disks are housed in the gear housing, and the gear housing preferably forms the abutment for the axial actuation of the movable conical disks (loose disks). Furthermore, the transmission housing preferably forms connections for fastening the belt transmission and, for example, for the supply of hydraulic fluid and/or a coolant. For this purpose, the transmission housing has a large number of boundary conditions and must fit into a given installation space. This interaction results in a housing wall on the inside, which limits the shape and movement of the components of the belt drive.

With the holding device proposed here for the damper device of the belt transmission, noise emissions from the belt transmission can be significantly reduced by means of structure-borne noise conduction into the transmission housing, thereby increasing end customer acceptance or reducing the noise damping effort for such a belt transmission. This can be achieved in that the space-saving embodiment of the housing-side anti-rotation element or the corresponding safety element creates additional space for a larger damper device that dampens better (compared to the same general conditions in a gear compartment).

According to a further aspect, a drive train is proposed, having at least one drive machine, each with a machine shaft, at least one consumer and a belt transmission according to an embodiment according to the above description,
wherein the machine shaft for torque transmission can be connected to the at least one consumer with, preferably steplessly, variable transmission by means of the belt transmission.

The drive train is set up to transmit a torque provided by a drive machine, for example an internal combustion engine and/or an electric drive machine, and delivered via its machine shaft, for example the combustion engine shaft and/or the (electric) rotor shaft, for use as required. i.e. taking into account the required speed and the required torque. One use is, for example, an electrical generator to provide electrical energy. In order to transfer the torque in a targeted manner and/or by means of a manual transmission with different gear ratios, the use of the belt transmission described above is particularly advantageous because a large ratio spread can be achieved in a small space and the drive machine can be operated with a small, optimal speed range. Conversely, inertial energy introduced by a drive wheel, for example, can also be absorbed by means of the belt transmission to an electric generator for recuperation, ie the electrical storage of braking energy, with a correspondingly configured torque transmission train. Furthermore, in a preferred embodiment, a plurality of drive machines are provided, which can be operated in series or parallel or decoupled from one another and whose torque can be made available as required by means of a belt transmission according to the above description. An application example is a hybrid drive, comprising an electric drive machine and an internal combustion engine.

With the proposed here belt transmission of the drive train reduced noise emissions can be achieved, so that Acceptance among end customers is increased and/or less effort is required for soundproofing in the case of the belt transmission and thus space can be saved (for example also outside of the transmission housing). This can be achieved with an enlarged damper device which, as a result of the installation space gained as described above, finds sufficient space in the gear compartment of the gear housing.

According to a further aspect, a motor vehicle is proposed, having at least one driving wheel, which can be driven by means of a drive train according to an embodiment according to the above description for propelling the motor vehicle.

Most motor vehicles today have a front-wheel drive and some arrange the drive machine, for example an internal combustion engine and/or an electric drive machine, in front of the driver's cab and transversely to the main direction of travel. The radial installation space is particularly small in such an arrangement and it is therefore particularly advantageous to use a small-sized belt transmission. The use of a belt transmission in motorized two-wheelers is similar, for which, in comparison to previously known two-wheelers, increased performance is always required with the same installation space. With the hybridization of the powertrains, this problem is getting worse.

This problem is exacerbated in the case of passenger cars in the small car class according to the European classification. The aggregates used in a passenger car in the small car class are not significantly smaller than in passenger cars in larger car classes. Nevertheless, the space available in small cars is much smaller. A comparable problem occurs in hybrid vehicles, in which a plurality of drive machines and clutches are provided in the drive train, so that the installation space is reduced overall.

With the drive train of the motor vehicle proposed here, acceptance by the end customer and vehicle occupants is improved due to reduced noise emissions from the belt drive and/or the cost of soundproofing is reduced, and installation space can thus be gained.

Passenger cars are assigned to a vehicle class according to, for example, size, price, weight and performance, with this definition being subject to constant change according to market needs. In the US market, vehicles in the small and micro car classes are assigned to the subcompact car class according to European classification, and in the British market they correspond to the supermini or city car class. Examples of the subcompact class are a Volkswagen up! or a Renault Twingo. Examples of the small car class are an Alfa Romeo MiTo, Volkswagen Polo, Ford Ka+ or Renault Clio. Well-known hybrid vehicles are the BMW 330e or the Toyota Yaris Hybrid. For example, an Audi A6 50 TFSI e or a BMW X2 xDrive25e are known as plug-in hybrids.

• 1: eine Halteeinrichtung in einem Getriebegehäuse in einer Schnittansicht;
• 2: ein Ausschnitt der Halteeinrichtung gemäß 1 in einem Aufnahmeelement in einer perspektivischen Ansicht;
• 3: ein Ausschnitt einer Halteeinrichtung in einem Aufnahmeelement in einer Schnittansicht;
• 4: ein Ausschnitt einer Halteeinrichtung in einem Getriebegehäuse bei der gegenüberliegenden Gehäusewand;
• 5: ein Umschlingungsgetriebe mit einer Halteeinrichtung in einem Getriebegehäuse; und
• 6: ein Antriebsstrang in einem Kraftfahrzeug mit Umschlingungsgetriebe.

The invention described above is explained in detail below against the relevant technical background with reference to the accompanying drawings, which show preferred embodiments. The invention is in no way restricted by the purely schematic drawings, it being noted that the drawings are not true to scale and are not suitable for defining size relationships. It is presented in

• 1 : a holding device in a transmission housing in a sectional view;
• 2 : a section of the holding device according to FIG 1 in a receiving element in a perspective view;
• 3 : a detail of a holding device in a receiving element in a sectional view;
• 4 : a section of a holding device in a transmission housing at the opposite housing wall;
• 5 : a belt transmission with a holding device in a transmission housing; and
• 6 : a drive train in a motor vehicle with a continuously variable transmission.

In 1 a holding device 1 is shown in a transmission housing 3 in a sectional view. According to the illustration, running direction 42 runs into the image plane; transverse direction 43 runs upwards orthogonally thereto and is orthogonal to axial direction 44 , which runs parallel to a (theoretical) pivot axis 6 . The holding device 1 comprises a bearing bridge 5 with the (theoretical) pivot axis 6 and a holding bridge 8. The holding device 1 is arranged between a first housing wall 16 and a second housing wall 17, which enclose a gear chamber 21 axially. The left section of the retaining bridge 8 includes the positioning element 9 and the bearing bridge-side section includes a bearing element 10. The positioning element 9 is used in cooperation with the receiving element 11 of the first housing wall 16 for positioning Bearing bridge 5 relative to the transmission housing 3. The bearing element 10 of the retaining bridge 8 is designed to connect the bearing bridge 5 and a separate axial securing element 12 shown here. The first housing wall 16 shown here on the left has a receiving element 11 which (optionally) receives the pin-like positioning element 9 of the retaining bridge 8 as a plug-in receptacle 23 . In this exemplary embodiment, the separate axial securing element 12 shown here comprises, in one piece, the bearing bridge 5 for accommodating a belt drive 4 and the second axial stop 46 first (here also anti-rotation, compare to 2 ) Tab 19 or second (here diametrically opposite) tab 20 is executed. In addition (independently of this), the retaining bridge 8 includes the first axial stop 45, by means of which, together with the second axial stop 46 of the axial securing element 12, a damper device 2 accommodated by the bearing bridge 5 is limited or fixed in its axial movement. An elastic bracing force is generated in the axial direction 44 by means of the lugs 19, 20 in such a way that the axial securing element is positioned without axial play in interaction with the housing stop 47 (optionally provided here) of the second housing wall 17.

In 2 is a section of a holding device 1 with a focus on the holding bridge 8 1 shown in a perspective view installed with the first housing wall 16 . The holding bridge 8 is supported by means of an axial bracing element 14 on a counter bearing 24 of a receiving element 11 (here) of the first housing wall 16 . The transverse direction 43 runs upwards in the image as shown, the running direction 42 runs orthogonally to the left out of the image plane and parallel to the (theoretical) pivot axis 6, the axial direction 44 is orthogonal to the transverse direction 43 and to the running direction 42. The retaining bridge 8 is by means of the one-piece (optional) pin-like positioning element 9 (cf 1 ) in a receiving element 11, designed here as a plug-in receptacle 23, positioned on the first housing wall 16. The tabs 19, 20 (independently also optionally formed in one piece with the retaining bridge 8). 1 , are supported against the counter bearing 24 of the first housing wall 16 (which is optionally formed in two parts and shaped like a peg here). In this embodiment, the upper abutment 24 (according to the illustration) comprises a first safety stop 25 and a second safety stop 26, by means of which a predetermined angular alignment of the retaining bridge 8 is ensured with the corresponding (here first) lug 19. The separate axial securing element 12 (shown cut off here) is located coaxially to the pivot axis 6 1 . For a desired assembly of the bearing bridge 5 in the correct position relative to the transmission housing 3, an anti-rotation element 15 is provided (here optionally in one piece). By means of this anti-rotation element 15 of the (separate) axial securing element 12, in cooperation with the counter-securing element 18 (here optionally formed in one piece) of the bearing element 10 of the retaining bridge 8 (designed here as an edge 48 and corresponding counter-edge 49), a positive connection is formed with the retaining bridge 8 and thus an angularly correct position of the bearing bracket 5 or the axial stops 45,46 is guaranteed. The embodiment shown is also set up according to the Poka-Yoke principle for a high degree of assembly safety. It should be pointed out at this point that the axial stops 45,46 (cf 1 with respect to the second axial stop 46) are trapezoidal in shape and thus a predetermined alignment to the transverse direction 43 is advantageous for tight space conditions.

In 3 a section of a holding device 1 in a receiving element 11 of a transmission housing 3 is shown in a sectional view. The coordinate axes are as in 1 chosen. For the sake of clarity, without excluding the general public, the retaining bridge 8 is largely identical to that in 1 and 2 embodiment shown is identical, so that reference is made to the description there. In contrast to the representation there, an enclosed axial securing element 13 is provided here, which is connected to the retaining bridge 8 (here optionally in one piece). In this representation, the receiving element 11 is rotated in comparison to the counter bearing 24 in the area framed by the two-dot-dash line, for example by 90° [ninety degrees of 360°], so that the securing bolt 50 can be easily installed. The included axial securing element 13 is designed here as a lateral hole in the area of the positioning element 9 of the retaining bridge 8, into which a securing bolt 50 is inserted from the radial outside (roughly in relation to the pivot axis 6) through a receiving hole 51 in the receiving element 11 of the (here optional first) housing wall 16 is introduced. From the elastic bracing force in the axial direction 44 of the axial bracing element 14 (here shown and functional in this respect with the embodiment according to 1 and 2 Identical tabs 19,20) the securing bolt 50 is forced axially against the counter-stop 52 in the receiving hole 51, so that the axial position of the retaining bridge 8 (and thus here at the same time the entire retaining device 1 including the bearing bridge 5, see below) is defined without play. In this embodiment, the included axial securing element 13 (together act with the safety bolt 50 and the receiving hole 51) a safeguard against twisting of the retaining bridge 8 is formed. In contrast to the axial bracing element 14 according to the embodiment 1 and 2 no safety stop is provided here at the counter bearing 24 . In the embodiment shown, the bearing bridge 5 is also (optionally) formed in one piece with the retaining bridge 8, with the second axial stop 46 (cf 1 ) is formed separately, for example for an axial insertion of a damper device 2 onto the bearing bridge 5. In one embodiment, the holding device 1 is then supported and mounted solely on the first housing wall 16 and is spaced apart from the second housing wall 17. Alternatively, the holding device 1 is inserted into an insertion element 27 of the second housing wall 17 and is thus supported radially (cf 4 ).

In 4 a section of a holding device 1 in a transmission housing 3 is shown in a sectional view on the opposite (optionally second here) housing wall 17 . The view and coordinate system are as in 1 chosen. The holding device 1 is, for example, in the section that is not shown as in FIG 1 respectively 2 or as in 3 executed. In this embodiment, the second housing wall 17 comprises an insertion element 27, by means of which the holding device 1 is also supported at least radially on the axially opposite second housing wall 17. The elastic bracing force in the axial direction 44 generated by the axial bracing element 14 (e.g. the tabs 19, 20 of the retaining bridge 8 according to the previously illustrated embodiments) in cooperation with the counter bearing 24 of the first housing wall 16 presses in one embodiment (shown in phantom) with a separate axial securing element 12 the section of the holding device 1 shown (in the insertion element 27) against the housing stop 47, so that the axial position of the holding device 1 (and thus the bearing bracket 5) is defined without play. The section of the holding device 1 shown is then, for example, part of the separate axial securing element 12, as shown in 1 is shown. In one embodiment with the axial securing element 13 comprised by the retaining bridge 8, an axial distance is maintained between the axial end 53 of the retaining device 1 and the second housing wall 17 (referred to here as the housing stop 47) to avoid a double fit.

In 5 a damper device 2 is shown schematically in a belt transmission 4, with a first run 33 of a belt means 22 being guided by the damper device 2 and thus damped. The belt transmission 4 is housed in a transmission housing 3, which limits the available installation space. The belt means 22 connects a first pair of conical disks 31 to a second pair of conical disks 32 in a torque-transmitting manner. On the first pair of conical disks 31, which is connected here, for example, to a transmission input shaft 29 so that it can rotate about an input-side axis of rotation 54 in a torque-transmitting manner, there is a corresponding spacing in the axial direction 44 (corresponds to the alignment of the Rotational axes 54,55) an input-side active circle 56, on which the belt 22 runs. On the second pair of conical disks 32, which is connected here, for example, to a transmission output shaft 30 so as to be rotatable about an output-side axis of rotation 55 in a torque-transmitting manner, an output-side active circle 57 is applied by appropriate spacing in the axial direction 44, on which the belt means 22 runs. The (variable) ratio of the two active circuits 56,57 results in the transmission ratio between the transmission input shaft 29 and the transmission output shaft 30. Between the two conical disk pairs 31,32, the first (guided here) run 33 and the second run 34 are shown in an ideal tangential alignment. so that the (shown and belonging to the first strand 33) parallel alignment of the running direction 42 is established. The transverse direction 43 shown here is defined as the third spatial axis perpendicular to the direction of travel 42 and perpendicular to the axial direction 44, this being to be understood as a co-moving coordinate system (depending on the effective circle). Therefore, both the running direction 42 shown and the transverse direction 43 only apply to the damper device 2 shown (designed here as a slide rail) and the first run 33, and only in the illustrated adjusted active circuit 56 on the input side and corresponding active circuit 57 on the output side Damping device 2 rests with its outer sliding surface 59 and its antagonistically aligned inner sliding surface 58 on the first strand 33 of the belt 22 in such a way that a damping sliding channel 60 for the first strand 33 is formed. So that the sliding surfaces 58,59 can follow the changing tangential orientation, ie the running direction 42, when changing the effective circles 56,57, the bearing receptacle 7 on the bearing bridge 5 is a holding device 1 with a pivot axis 6 according to one embodiment 1 until 4 stored. As a result, the damper device 2 is mounted such that it can pivot about the pivot axis 6 . In the exemplary embodiment shown, the pivoting movement is composed of a superimposition of a pure angular movement and a transversal movement, so that a movement along an oval (steeper) curved path occurs, deviating from a movement along a circular path.

• - Umlaufrichtung 61 und die Laufrichtung 42 sind bei Drehmomenteingang über das erste Kegelscheibenpaar 31 umgekehrt; oder
• - Getriebeausgangswelle 30 und die Getriebeeingangswelle 29 sind vertauscht, sodass das zweite Kegelscheibenpaar 32 den Drehmomenteingang bildet.

In the direction of rotation 61 shown as an example and with torque input via the transmission input shaft 29, the damper device 2 forms the inlet side on the left and the outlet side on the right in the illustration. In the case of an embodiment as a traction drive, the first strand 33 then forms the tight strand as the tight strand and the second strand 34 the slack strand. If the belt means 22 is designed as a push belt, under otherwise the same conditions, either the first strand 33 is guided as a slack strand by means of the damper device 2, or the first strand 33 is designed as a load strand and push strand and:

• - The direction of rotation 61 and the running direction 42 are reversed when torque is input via the first pair of conical pulleys 31; or
• - Transmission output shaft 30 and the transmission input shaft 29 are reversed, so that the second pair of conical disks 32 forms the torque input.

In 6 a drive train 28 in a motor vehicle 41 with a belt transmission 4 is shown. Motor vehicle 41 has a longitudinal axis 62 and an engine axis 63 , engine axis 63 being arranged in front of driver's cab 64 . The drive train 28 comprises a first drive machine 35, which is preferably designed as an internal combustion engine and is then connected to the belt transmission 4 in a torque-transmitting manner via a combustion engine shaft 37, for example. A second drive machine 36, which is preferably designed as an electric drive machine, is also connected to the belt drive 4 in a torque-transmitting manner via a rotor shaft, for example. A torque for the drive train 28 is delivered simultaneously or at different times by means of the drive machines 35, 36 or via their machine shafts 37, 38. However, a torque can also be received, for example by means of the internal combustion engine 35 for engine braking and/or by means of the electric drive machine 36 for the recuperation of braking energy. On the output side, the continuously variable transmission 4 is connected to an output, shown purely schematically, so that a left-hand drive wheel 39 and a right-hand drive wheel 40 can be supplied with torque from the prime mover 35, 36 with a variable transmission ratio.

With the holding device proposed here, simple assembly and low susceptibility to vibrations caused by play can be achieved.

Reference List

1

holding device

2

damper device

3

gear case

4

belt transmission

5

bearing bridge

6

pivot axis

7

stock pick-up

8th

retaining bridge

9

positioning element

10

bearing element

11

receiving element

12

separate axial locking element

13

included axial locking element

14

axial bracing element

15

anti-rotation element

16

first housing wall

17

second housing wall

18

counter security element

19

anti-rotation tab

20

opposite tab

21

gear room

22

means of restraint

23

plug-in receptacle

24

counter bearing

25

first backup stop

26

second safety stop

27

male element

28

powertrain

29

transmission input shaft

30

transmission output shaft

31

first pair of pulleys

32

second pair of pulleys

33

first strand

34

second strand

35

first drive machine

36

second prime mover

37

first machine wave

38

second machine shaft

39

left drive wheel

40

right drive wheel

41

motor vehicle

42

running direction

43

transverse direction

44

axial direction

45

first axial stop

46

second axial stop

47

housing stop

48

edge

49

opposite edge

50

safety bolt

51

receiving hole

52

counterattack

53

end of the holding device

54

input-side rotation axis

55

output axis of rotation

56

first sphere of action

57

second sphere of action

58

inner sliding surface

59

outer sliding surface

60

sliding channel

61

direction of circulation

62

longitudinal axis

63

motor axis

64

driver's cabin

Claims (9)

Holding device (1) for a damper device (2) in a transmission housing (3) of a belt transmission (4), having at least the following components: - a bearing bracket (5) with a pivot axis (6) for a bearing mount (7) of a damper device (2 ); - a retaining bridge (8) which comprises a positioning element (9) and a bearing element (10), the positioning element (9) for, in cooperation with a receiving element (11) of the transmission housing (3) of the belt transmission (4), positioning the Bearing bracket (5) is set up relative to said gear housing (3); - an axial securing element (12,13) for axially securing the holding device (1) within said transmission housing (3) by means of axial support on said transmission housing (3); and - an axial bracing element (14) connected to the retaining bridge (8) for, by means of axial bracing on the said transmission housing (3) and by means of the axial securing element (12, 13), positioning the bearing bridge (5) without play, wherein the axial bracing element (14 ) is comprised by the retaining bridge (8), characterized in that the axial bracing element (14) is formed in the manner of a lug, extending radially from the holding bridge (8), and comprises two lugs (19, 20) lying opposite one another. Holding device (1) after claim 1 , wherein the axial securing element (12) is formed separately from the retaining bridge (8) and comprises a rotation securing element (15), and the bearing element (10) of the retaining bridge (8) and/or a corresponding housing wall (17) has a corresponding counter-securing element (18) wherein the anti-rotation element (15) and the corresponding counter-locking element (18) ensure that the bearing bridge (5) is installed in the correct position relative to the transmission housing (3), the axial locking element (12) preferably being axially free of play by means of the axial bracing element (14). the bearing element (10) and oppositely connected to said gear housing (3). Holding device (1) after claim 1 , wherein the axial securing element (13) is encompassed by the retaining bridge (8) and is preferably set up to interact with said receiving element (11) of the transmission housing (3) for the positioning element (9) for axially securing the retaining device (1). Retaining device (1) according to one of the preceding claims, in which the axial bracing element (14) is formed in a purely elastically supporting manner and is preferably formed in one piece with the retaining bridge (8). Retaining device (1) according to one of the preceding claims, wherein the axial bracing element (14) also ensures a predetermined angular alignment of the bearing bridge (5) in cooperation with the said transmission housing (3), preferably by means of the said receiving element (11). Transmission housing (3), having at least the following components: - a first housing wall (16); - A second housing wall (17), wherein the first housing wall (16) and the second housing wall (17) are arranged axially opposite one another on the side of a gear chamber (21) for a belt transmission (4); and - a receiving element (11) for the holding bridge (8) of a holding device (1) according to one of the preceding claims, wherein the bearing bracket (5) of the holding device (1) is set up for mounting a damper device (2) for a belt mechanism (22) of the belt drive (4), the receiving element (11) having one of the housing walls (16) is firmly connected. Transmission housing (3) after claim 6 , wherein the receiving element (11) of one of the housing walls (16) comprises a plug-in receptacle (23) for the positioning element (9) of the retaining bridge (8) and a counter bearing (24) for the axial bracing element (14) of the retaining bridge (8), wherein preferably the counter bearing (24) also comprises at least one safety stop (25, 26) to ensure a predetermined angular alignment of the bearing bracket (5). Transmission housing (3) after claim 6 or claim 7 , wherein the respective axially opposite housing wall (17) for axially supporting the holding device claim 2 is set up, the axially opposite housing wall (17) preferably comprising an insertion element (27) by means of which the separate axial securing element (12) is supported radially relative to the axially opposite housing wall (17). Continuous transmission (4) for a drive train (28), having at least the following components: - a transmission input shaft (29) with a first pair of conical pulleys (31); - A transmission output shaft (30) with a second pair of conical pulleys (32); - An encircling means (22) by means of which the first pair of conical disks (31) is connected to the second pair of conical disks (32) in a torque-transmitting manner; - A damping device (2), which on the bearing bridge (5) of a holding device (1) according to one of claim 1 until claim 5 is stored; and - a transmission housing (3), according to one of claim 6 until claim 8 , wherein the damping device (2) rests against a strand (33, 34) of the belt (22) in a damping manner.

Images