TORQUE TRANSMISSION APPARATUS FOR THE TRANSMISSION OF A TORQUE TO A TRANSMISSION OF A VEHICLE WHICH CAN BE DRIVEN VIA A HYBRID DRIVE

Abstract

A torque transmission apparatus for transmission of a torque to a transmission of a vehicle which can be driven via a hybrid drive is disclosed. The torque transmission apparatus comprises an input shaft, a rotor shaft, and a clutch device. The input shaft can be connected or is connected in a torque-transmitting manner to an internal combustion engine. The rotor shaft can be connected or is connected in a torque-transmitting manner to an electric machine. The clutch device connects the input shaft and the rotor shaft at least temporarily in a torque-transmitting manner. The clutch device can be configured in a first operating state, to transmit a torque between the input shaft and a transmission shaft which is assigned to a transmission via the rotor shaft. The crutch device can also be configured in a further operating state to transmit a reduced torque or no torque between the input shaft and the transmission shaft. The input shaft has a receiving section, for indirectly or directly receiving a section of the rotor shaft, and/or the rotor shaft having a receiving section for indirectly or directly receiving a section of the input shaft.

Claims

1. A torque transmission apparatus for the transmission of a torque to a transmission of a vehicle which can be driven via a hybrid drive, comprising: an input shaft which can be connected or is connected in a torque-transmitting manner to an internal combustion engine, a rotor shaft which can be connected or is connected in a torque-transmitting manner to an electric machine, and a clutch device which connects the input shaft and the rotor shaft at least temporarily in a torque-transmitting manner, the clutch device being configured, in a first operating state of the clutch device, to transmit a torque between the input shaft and a transmission shaft which is assigned to a transmission via the rotor shaft, and, in a further operating state of the clutch device, to transmit a reduced torque or no torque between the input shaft and the transmission shaft, wherein the input shaft further comprises a receiving section for indirectly or directly receiving a section of the rotor shaft, and/or the rotor shaft having a receiving section for indirectly or directly receiving a section of the input shaft.

2. The torque transmission apparatus as claimed in claim 1, wherein the rotor shaft and the input shaft are oriented coaxially with respect to one another, and the rotor shaft and/or the input shaft are/is configured as a hollow shaft.

3. The torque transmission apparatus as claimed in claim 1, wherein the input shaft and the rotor shaft are mounted, via a mounting device such that the input shaft and the rotor shaft can be moved rotationally with respect to one another, and wherein the mounting device has at least one radial mounting arrangement and at least one axial mounting arrangement.

4. The torque transmission apparatus as claimed in claim 3, wherein the mounting device is at least partially received in an inner region of the input shaft, which inner region receives the rotor shaft, or in an inner region of the rotor shaft, which inner region receives the input shaft, and all the mounting arrangements of the mounting device are received in an inner region of the rotor shaft or of the input shaft.

5. The torque transmission apparatus as claimed in claim 1, wherein the input shaft and/or the rotor shaft are/is mounted via a bearing device with a housing body which surrounds the clutch device and/or the input shaft and/or the rotor shaft at least in sections, and the input shaft is mounted via a first bearing arrangement on a housing part body of the housing body, and the rotor shaft is mounted via a further bearing arrangement on a further housing part body of the housing body.

6. The torque transmission apparatus as claimed in claim 1, wherein a spacer element is arranged between the input shaft and a housing body which surrounds the clutch device and/or the input shaft and/or the rotor shaft at least in sections, and a defined spacing is produced in an axial direction between the input shaft and the housing body by the spacer element.

7. The torque transmission apparatus as claimed in claim 1, wherein a housing body which surrounds the clutch device and/or the input shaft and/or the rotor shaft at least in sections comprises a connecting channel which connects a housing body space which receives the clutch device to a region which faces away from said housing body space in such a way that, when the torque transmission apparatus is used as intended, a fluid which is situated in the housing body space passes via the connecting channel into the remote region, an outlet opening of the connecting channel to the remote region is arranged close to a mounting device and/or close to a bearing device, and the outlet opening is arranged so as to adjoin a mounting device and/or a bearing device directly.

8. The torque transmission apparatus as claimed in claim 1, comprising a first fluid channel which runs at least in sections in an interior space of the rotor shaft for conducting a control fluid, to the clutch device, in order to control the clutch device into defined operating states.

9. The torque transmission apparatus as claimed in claim 1, further comprising a further fluid channel which runs at least in sections in an interior space of the rotor shaft and/or in an interior space of the input shaft for conducting a lubricating and/or cooling fluid, to at least one mounting device and/or to at least one bearing device.

10. The torque transmission apparatus as claimed in claim 1, wherein a separating element for separating a section of a fluid channel from a section of a further fluid channel is received at least in sections, in an interior space of the rotor shaft and/or in an interior space of the input shaft, and the separating element is configured as a sleeve.

11. The torque transmission apparatus as claimed in claim 1, wherein the input shaft comprises a holding section which is arranged on a surface which faces away from the rotor shaft, and the holding section has an undercut region which can be engaged behind by way of a holding apparatus.

12. A transmission arrangement for a vehicle which can be driven by way of a hybrid drive, comprising an internal combustion engine and an electric machine which are connectable via a torque transmission apparatus as claimed in claim 1 to a transmission of the transmission arrangement.

13. A vehicle comprising a hybrid drive for driving the vehicle, and a transmission arrangement as claimed in claim 12.

14. A method for assembling a torque transmission apparatus comprising: providing an input shaft and a rotor shaft, the input shaft and the rotor shaft being mounted such that the input shaft and the rotor shaft can be moved rotationally with respect to one another via a mounting device which absorbs at least axial forces, holding the input shaft by a holding apparatus on a holding section which is arranged on an input shaft side, joining a bearing device to or onto and/or into a section of the input shaft with no joining forces acting on the mounting device during the joining operation as a result of holding the input shaft by way of the holding apparatus.

15. A method for assembling a torque transmission apparatus comprising: a) providing an input shaft which is mounted via a bearing device with a first housing part body, a spacer element which defines an axial spacing being arranged between the input shaft and the first housing part body, b) providing a rotor shaft which is mounted in a rotationally movable manner with the input shaft via a mounting device which absorbs at least axial forces, the rotor shaft being connected in a torque-transmitting manner to a transmission shaft, and the transmission shaft being mounted via a mounting with a transmission housing, and the transmission housing being connected to a housing body which surrounds a clutch device and/or the input shaft and/or the rotor shaft at least in sections, c) bringing together c1) a first assembly that includes the input shaft, the bearing device and the first housing part body, and c2) a further assembly that includes a constituent part of the housing body, the transmission housing, the transmission shaft and the rotor shaft, c3) the spacer element being a constituent part of the first or the further assembly, d) measuring a first axial spacing between d1) a first housing body-side contact face for contact with the first housing part body, and d2) a second input shaft-side contact face for contact with the spacer element; e) measuring of a further axial spacing between e1) a third housing part body-side contact face for contact with the housing body, and e2) a fourth mounting device-side contact face for contact with the spacer element, f) selecting and/or specifying a spacer element with a defined axial distance spacing on the basis of a comparison of the two measured axial spacings.

16. The method for assembling a torque transmission apparatus claim 15, wherein the spacer element is positioned between the input shaft and the bearing device which is arranged on the housing part body side.

17. The torque transmission apparatus as claimed in claim 1, wherein the rotor shaft and the input shaft are oriented coaxially with respect to one another, and the rotor shaft and/or the input shaft are/is configured as a hollow shaft defining a fluid channel, wherein a separating element for separating a section of the fluid channel from a section of a further fluid channel is received in an interior space of the rotor shaft and/or in an interior space of the input shaft.

18. The torque transmission apparatus as claimed in claim 17, wherein the separating element is configured as a sleeve that is fixed in hollow shaft of the rotor.

19. The torque transmission apparatus as claimed in claim 1, wherein a housing body surrounds the clutch device, and wherein the housing body comprises a connecting channel that connects a housing body space that receives the clutch device to a region that is remote from the housing body space such that a fluid situated in the housing body space passes via the connecting channel into the remote region.

20. The torque transmission apparatus of claim 19, wherein an outlet opening of the connecting channel is arranged to directly adjoin a bearing device.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The disclosure is described in greater detail on the basis of exemplary arrangements in the drawings, in which:

[0030] FIG. 1 shows a diagrammatic outline illustration of a torque transmission apparatus in accordance with one exemplary arrangement,

[0031] FIG. 2 shows a diagrammatic detailed illustration of an interface of the torque transmission apparatus, which interface faces an internal combustion engine, and

[0032] FIG. 3 shows a diagrammatic detailed illustration of an interface of the torque transmission apparatus, which interface faces a transmission.

DETAILED DESCRIPTION

[0033] Torque transmission apparatus 1 for the transmission of a torque to a transmission 2 of a vehicle (not shown) which can be driven via a hybrid drive. The internal combustion engine 3 and the transmission 2 are not shown or are shown merely in fractional amounts in the figures. The torque transmission apparatus 1 comprises an input shaft 4 which can be connected or is connected in a torque-transmitting manner to the internal combustion engine 3, and a rotor shaft 6 which can be connected or is connected in a torque-transmitting manner to an electric machine 5. The electric machine 5 comprises a stator which is arranged on or fastened to a housing body 15, and a rotor which is arranged on or fastened to a rotor shaft 6.

[0034] The input shaft 4 and the rotor shaft 6 are connected or can be connected at least temporarily in a torque-transmitting manner via a clutch device 7, the clutch device 7 being configured a), in a first operating state of the clutch device 7, to transmit a torque between the input shaft 4 and a transmission shaft 8 which is assigned to a transmission 2, in particular via the rotor shaft 6, and b), in a further operating state, to transmit a reduced torque or no torque between the input shaft 4 and the transmission shaft 8. Here, the input shaft 4 can have a receiving section 9, in particular in the form of a recess, for indirect or direct receiving of a section 10 of the rotor shaft 6 (see figures) and/or the rotor shaft 6 can have a receiving section, in particular in the form of a recess, for indirect or direct receiving of a section of the input shaft 4 (not shown).

[0035] The rotor shaft 6 and the input shaft 4 can be oriented coaxially with respect to one another, and the rotor shaft 6 and the input shaft 4 can be configured as a hollow shaft. In one exemplary arrangement which is shown, the input shaft 4 is configured as a hollow shaft which is closed on one end side, and the rotor shaft 6 is configured as a hollow shaft which configures a continuous central channel.

[0036] The input shaft 4 and the rotor shaft 6 are mounted such that they can be moved rotationally with respect to one another directly via a mounting device 11. Here, the mounting device 11 has at least one radial mounting arrangement 12 and at least one axial mounting arrangement 13. Said two mounting devices 11, 12, 13 mount the input shaft 4 and the rotor shaft 6 directly with one another, that is to say without a further element being connected in between.

[0037] In the exemplary arrangement shown, the mounting device 11 is arranged or received completely in an inner region 14 or receiving section 9 of the input shaft 4 which receives the rotor shaft 6 or the section 10 of the rotor shaft 6. All mounting arrangements 12, 13 of the mounting device 11 are may be received in the inner region 14 or in the receiving section 9 of the input shaft 4. This leads to a compact overall design and, at the same time, to a stable construction of the torque transmission apparatus 1.

[0038] In the exemplary arrangement shown, the input shaft 4 and the rotor shaft 6 are mounted directly via a bearing device 14 with a housing body 15 which surrounds the clutch device 7 and/or the input shaft 4 and/or the rotor shaft 6 at least in sections, in particular completely. In other words, the housing body 15 surrounds or encloses the clutch device 7 and possibly parts of the input shaft 4 and/or the rotor shaft 6 at least in sections, and in some instances, completely. Here, the bearing device 14 can comprise, for example, a first bearing means 16 and at least one further bearing arrangement 17.

[0039] The input shaft 4 may be mounted via the first bearing apparatus 16 on a housing part body 18 of the housing body 15, and the rotor shaft 6 may be mounted via a further bearing arrangement 17 on a further housing part body 19 of the housing body 15. In the exemplary arrangement shown, the housing body 15 is constructed in three pieces by way of example, a first housing part body 18 being arranged on a central housing part body 20 on its first axial end section (pointing toward the internal combustion engine) of the housing part body 20, and a further housing part body 19 being arranged on a further end section of the central housing part body 20, which further end section, may be remote from the first axial end section. In the exemplary arrangement shown, the housing part bodies 18, 19, 20 are connected to one another in a non-positive and/or positively locking manner or form a joint assembly. Here, the central housing part body 20 is configured as a body which configures a cavity, said cavity being delimited or closed off laterally by way of the substantially radially extending first and further housing part bodies 18, 19. The first and the further housing part body 18, 19 in each case have a central passage opening, through which the input shaft 4 and/or the rotor shaft 6 and/or a connecting body, for example, a connecting shaft 21, pass/passes or can pass. Here, the first bearing arrangement 16 and the further bearing arrangement 17 form the interfaces in or on the passage openings of the housing part bodies 18, 19 to the elements which penetrate them (input shaft 4, rotor shaft 6 and/or connecting body 22). The connecting body or the connecting shaft 21 can be connected to the rotor shaft 6 in a plug-in connection, and, in this way, axial forces can be introduced from the transmission or from the transmission shaft via the rotor shaft and the ball bearing in the first housing part body 18.

[0040] A spacer element 22 is arranged between the input shaft 4 and a housing body 15 which surrounds the clutch device 7 and/or the input shaft 4 and/or the rotor shaft 6 at least in sections. A defined spacing in the axial direction between the input shaft 4 and the housing body 15, and in one exemplary arrangement, between the input shaft 4 and the housing part body 18 which may face the internal combustion engine in the final assembly state, is set or produced by way of the spacer element 22. Here, a first bearing arrangement 16 can be arranged between the input shaft 4 and the housing part body 18. It is possible for the spacer element 22 to be arranged on that surface of the first bearing arrangement 16 which faces the input shaft 4.

[0041] A housing body 15 which surrounds the clutch device 7 and/or the input shaft 4 and/or the rotor shaft 6 at least in sections can comprise a connecting channel 23 which connects a housing body space 24 which receives the clutch device 7 to a region 25 which is remote from said housing body space 24, in such a way, that in the use as intended of the torque transmission apparatus 1, a fluid which is situated in the housing body space 24 passes via the connecting channel 23 into the remote region 25. An outlet opening of the connecting channel 23, which outlet opening is directed toward the remote region 25, may be arranged or configured close to a mounting device 11 and/or close to a bearing device 14. In one exemplary arrangement, the outlet opening of the connecting channel 23 is arranged or configured so as to adjoin a mounting device 11 and/or a bearing device 14 directly. In the embodiment which is shown, the outlet opening of the connecting channel 23 adjoins the first bearing arrangement 16 of the bearing device 14. In one exemplary arrangement, the first bearing arrangement 16 is configured as a radial and axial bearing. The connecting channel 23 can be oriented, for example, so as to run towards the center or toward the rotational axis in a direction which is directed toward the outer end of the input shaft 4.

[0042] The torque transmission apparatus 1 can comprise, for example, a first fluid channel which runs at least in sections in an interior space 26 of the rotor shaft 6 (cf. arrow 27) for conducting a control fluid, in particular a control oil, to the clutch device 7, in order to control the clutch device 7 into defined operating states. In addition, the torque transmission apparatus 1 can comprise a further fluid channel which runs at least in sections in an interior space 26 of the rotor shaft 6 and/or in an interior space 28 of the input shaft 4 (cf. arrow 29) for conducting a lubricating and/or cooling fluid, in particular a lubricating and/or cooling oil, said further fluid channel 29 leading at least to at least one mounting device 11 and/or to at least one bearing device 14.

[0043] A separating element 30 for separating a section of a fluid channel 27 with respect to a section of a further fluid channel 28 can be received at least in sections, in particular completely, in an interior space 26 of the rotor shaft 6 and/or in an interior space 28 of the input shaft 4. In one exemplary arrangement, the separating element 30 is configured as a sleeve which may be fabricated from plastic, and is optionally fixed in a clamping manner in the interior space 26 of the rotor shaft.

[0044] The input shaft 4 may comprise, for example, a holding section 31 which is arranged or configured, in particular, on a surface which faces away from the rotor shaft 6. In one exemplary arrangement, the holding section 31 may have an undercut region 32 which can be engaged behind by way of a holding apparatus.

[0045] In addition to the torque transmission apparatus 1, the disclosure comprises a transmission arrangement for a vehicle which can be driven by way of a hybrid drive, in particular a motor vehicle, comprising an internal combustion engine 3 and an electric machine 5 which are connected or can be connected via a torque transmission apparatus 1 as described herein to a transmission 2 of the transmission arrangement.

[0046] In an optional method for the assembly of a torque transmission apparatus 1, in particular a torque transmission apparatus 1 as described herein, the following steps can be provided: a) providing of an input shaft 4 and a rotor shaft 6, the input shaft 4 and the rotor shaft 6 being mounted such that they can be moved rotationally with respect to one another via a mounting device 11 which absorbs at least axial forces, and in one exemplary arrangement, via at least one axial mounting arrangement 13, b) holding of the input shaft 4 by a holding apparatus (not shown) on a holding section 31 which is arranged or configured on the input shaft side, c) joining, and in one exemplary arrangement, by pressing, of a bearing device 14 to or onto and/or into a section of the input shaft 4, such that no joining forces act on the mounting device 11, and in one exemplary arrangement, no joining forces act on the axial mounting arrangement 13, during the joining operation as a result of the holding of the input shaft 4 by way of the holding apparatus.

[0047] As an alternative or in addition, it can be provided that, in a method for the assembly of a torque transmission apparatus 1, for example a torque transmission apparatus 1 as described herein, the following steps are carried out: a) providing of an input shaft 4 which is mounted via a bearing device 14 with a housing part body 18, 19, 20, a spacer element 22 which defines an axial spacing being arranged or being capable of being arranged between the input shaft 4 and the housing part body 18, 19, 20, and in one exemplary arrangement, between the input shaft 4 and the first bearing arrangement 16, b) providing of a rotor shaft 6 which is mounted or can be mounted in a rotationally movable manner with the input shaft 4 via a mounting device 11 which absorbs at least axial forces, the rotor shaft 6 being connected in a torque-transmitting manner to a transmission shaft 8, and the transmission shaft 8 being mounted via a mounting with a transmission housing, and the transmission housing being connected to a housing body 15 which surrounds a clutch device 7 and/or the input shaft 4 and/or the rotor shaft 6 at least in sections, c) bringing together c1) of a first assembly at least including the input shaft 4, the bearing device 14, in particular the first bearing arrangement 16, and the housing part body 18, and c2) a further assembly at least consisting of a constituent part of the housing body 15, in particular at least of the central housing part body 20, the transmission housing, the transmission shaft 8 and the rotor shaft 6, c3) the spacer element 22 being a constituent part of the first or the further assembly, d) measuring of a first axial spacing between d1) a first housing part body-side contact face 34 of the central housing part body 20 for contact with the housing part body 18, and d2) a second input shaftside contact face 35 for contact with the spacer element 22; e) measuring of a further axial spacing between e1) a third housing part body-side contact face 37 of the first housing part body 18 for contact with a housing part body 19, 20, in particular with the central housing part body 20, and e2) a fourth mounting device-side contact face 38 for contact with the spacer element 22, f) selecting and/or specifying of a spacer element 22 with a defined axial distance spacing on the basis of a comparison of the two measured axial spacings.

[0048] In other words, a first axial spacing between the contact faces 34 and 35 and a further axial spacing between the contact faces 37 and 38 are determined, and a spacer element 22 with a defined thickness or with a defined axial extent is installed into the torque transmission apparatus 1 in a manner which is dependent on a difference or a relation of said two spacings.