CLUTCH UNIT

Abstract

A clutch unit for a drive unit, comprising: at least one outer ring and one inner ring, wherein the rings are mounted rotatably relative to each other, the outer ring being configured to be in operative engagement with a first component of a drive unit of a vehicle and the inner ring being configured to be in operative engagement with a second component of a drive unit of a vehicle; at least one first locking element; at least one first displacement element; the at least one first locking element being movably mounted on one of the rings and being movable by the displacement element in order to engage in a corresponding recess of the other ring a rotationally fixed connection of the two rings in at least a first direction of rotation being provided.

Claims

1. A clutch unit for a drive unit, comprising: at least one outer ring and one inner ring, wherein the at least one outer ring and the at least one inner ring are mounted rotatably relative to each other, the outer ring configured to be in operative engagement with a first component of a drive unit of a vehicle and the inner ring configured to be in operative engagement with a second component of a drive unit of a vehicle; at least one first locking element; and at least one first displacement element, the at least one first locking element movably mounted on one of the rings and movable by the displacement element in order to engage in a corresponding recess of the other ring a rotationally fixed connection of the two rings in at least a first direction of rotation provided.

2. The clutch unit according to claim 1, further comprising: at least one second locking element; and at least one second displacement element, the at least one second locking element movably mounted on one of the rings and movable by the second displacement element in order to engage in a corresponding recess of the other ring a rotationally fixed connection of the two rings in a second direction of rotation opposite to the first direction of rotation provided.

3. The clutch unit according to claim 1, the first or second displacement element comprising: at least one drive and return element; and at least one actuating element in operative engagement with the at least one locking element in order to move the at least one locking element, the drive and return element operatively engaged with the actuating element; the actuating element movable into a first position and into a second position, the locking element moved in a corresponding recess of the other ring in one of the two positions of the actuating element, and the locking element not engaging in the recess of the other ring in the other position of the actuating element.

4. The clutch unit according to claim 3, the at least one actuating element arranged between the inner ring and the outer ring.

5. The clutch unit according to claim 3, the at least one drive element provided in the form of a hydraulic cylinder arrangement and the return element provided in the form of a spring element; the drive element configured to move the actuating element into one of the two positions and the return element configured to move the actuating element into the other position.

6. The clutch unit according to claim 1, the displacement element is comprising at least one ramp-shaped cross-section for moving the locking element into the corresponding recess of a ring.

7. The clutch unit according to claim 6, the actuating element is comprising at least one ramp-shaped cross-section for moving the locking element into the corresponding recess of a ring.

8. The clutch unit according to claim 1, the clutch unit is comprising a first mode of operation in which no locking element is engaging a recess of a ring so that both rings being independently rotatably provided.

9. The clutch unit according to claim 1, the clutch unit is comprising a second mode of operation in which only the at least one first locking element is engaging a corresponding recess of a ring providing a rotationally fixed connection of the two rings in at least the first direction of rotation.

10. The clutch unit according to claim 1, the clutch unit is comprising a third mode of operation in which only the at least one second locking element is engaging a corresponding recess of a ring providing a rotationally fixed connection of the two rings in at least the second direction of rotation.

11. The clutch unit according to claim 1, the clutch unit is comprising a fourth mode of operation in which the at least one first locking element and the at least one second locking element each engaging corresponding recesses of a ring providing a rotationally fixed connection of the two rings in the first direction of rotation and the second direction of rotation.

12. A drive unit for a vehicle, comprising: at least one motor unit; at least one drive wheel being operatively connected to and drivable by the motor unit; a differential gear with a housing unit being driveable by the drive wheel, the drive wheel and the housing unit arranged around a common axis of rotation; and at least one clutch unit being provided between the drive wheel and the housing unit, wherein the at least one clutch unit comprises: at least one outer ring and one inner ring, wherein the at least one outer ring and the at least one inner ring are mounted rotatably relative to each other, the outer ring configured to be in operative engagement with a first component of a drive unit of a vehicle and the inner ring configured to be in operative engagement with a second component of a drive unit of a vehicle; at least one first locking element; and at least one first displacement element, the at least one first locking element movably mounted on one of the rings and movable by the displacement element in order to engage in a corresponding recess of the other ring a rotationally fixed connection of the two rings in at least a first direction of rotation being provided.

13. The drive unit for a vehicle according to claim 12, comprising: the inner ring of the clutch unit being arranged rotationally fixed to the housing unit of the differential gear; and the outer ring of the clutch unit being arranged rotationally fixed to the drive wheel.

14. The drive unit for a vehicle according to claim 12, at least one drive element of the clutch unit being provided in a housing unit and the at least one drive element connected to at least one actuating element by a bearing arrangement.

15. The drive unit for a vehicle according to claim 12, the drive wheel at least partially enclosing the housing unit.

16. The drive unit for a vehicle according to claim 12, the drive unit comprising at least a first operating mode in which no torque being transmitted between the drive wheel and the housing unit; or comprising a second operating mode in which torque being transmitted between the drive wheel and the housing unit in a first direction only; or comprising a third mode of operation in which torque being transmitted in a second direction between the drive wheel and the housing unit in a second direction only; or comprising a fourth mode of operation in which torque being transmitted in both directions between the drive wheel and the housing unit.

17. The drive unit for a vehicle according to claim 12, the motor unit and the drive wheel being operatively connected by means of a gear wheel unit.

18. Use of a clutch unit in a drive unit, wherein the clutch unit comprises: at least one outer ring and one inner ring, wherein the at least one outer ring and the at least one inner ring are mounted rotatably relative to each other, the outer ring configured to be in operative engagement with a first component of a drive unit of a vehicle and the inner ring configured to be in operative engagement with a second component of a drive unit of a vehicle; at least one first locking element; and at least one first displacement element, the at least one first locking element movably mounted on one of the rings and movable by the displacement element in order to engage in a corresponding recess of the other ring a rotationally fixed connection of the two rings in at least a first direction of rotation provided, and wherein the drive unit comprises: at least one motor unit; at least one drive wheel being operatively connected to and drivable by the motor unit; a differential gear with a housing unit being driveable by the drive wheel, the drive wheel and the housing unit arranged around a common axis of rotation; and the clutch unit provided between the drive wheel and the housing unit.

19. Use of a differential gear comprising a housing unit being arrangeable in a drive unit, wherein the drive unit comprises: at least one motor unit; at least one drive wheel being operatively connected to and drivable by the motor unit; a differential gear with a housing unit being driveable by the drive wheel, the drive wheel and the housing unit arranged around a common axis of rotation; and at least one clutch unit being provided between the drive wheel and the housing unit.

20. A vehicle, in particular a vehicle comprising an electric drive, comprising at least one drive unit, wherein the drive unit comprises: at least one motor unit; at least one drive wheel being operatively connected to and drivable by the motor unit; a differential gear with a housing unit being driveable by the drive wheel, the drive wheel and the housing unit arranged around a common axis of rotation; and at least one clutch unit being provided between the drive wheel and the housing unit.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0024] In the following, the disclosure is described exemplarily with reference to the enclosed figure, in which

[0025] FIG. 1 is a schematic view of a drive unit according to a preferred embodiment of the present disclosure;

[0026] FIG. 2 is a schematic view of a clutch unit according to a preferred embodiment of the present disclosure,

[0027] FIG. 3 is an enlarged schematic view the clutch unit shown in FIG. 2;

[0028] FIG. 4 is an enlarged schematic view the clutch unit shown in FIG. 2;

[0029] FIG. 5 is an enlarged schematic view the clutch unit shown in FIG. 2;

[0030] FIG. 6 is an enlarged cross-sectional view of a first and second displacement element;

[0031] FIGS. 7a-7c are schematic views of the clutch unit in a first mode;

[0032] FIGS. 8a-8c are schematic views of the clutch unit in a second mode;

[0033] FIGS. 9a-9c are schematic views of the clutch unit in a third mode; and

[0034] FIGS. 10a-10c are schematic views of the clutch unit in a fourth mode.

[0035] Notably, the figures are merely schematic representations and serve only to illustrate the preferred embodiment of the present disclosure. Identical or equivalent elements are in principle provided with the same reference signs.

DESCRIPTION OF EMBODIMENTS

[0036] FIG. 1 shows a schematic view of a drive unit 100 comprising a clutch unit 10 according to a preferred embodiment of the present disclosure.

[0037] The drive unit 100 comprises a motor unit 110, e.g. an electric motor unit 110, one drive wheel 120, e.g. a planetary carrier 120, which is operatively connected to and drivable by the motor unit 110 via a gear wheel 130. A differential gear with a housing unit 140 which is driveable by the drive wheel 120, wherein the drive wheel 120 and the housing unit 140 are arranged around a common axis of rotation 150. As can be taken form FIG. 1, the clutch unit 10 is provided between the drive wheel/planetary carrier 120 and the differential housing unit 140.

[0038] An inner ring 11 of the clutch unit 10 is arranged rotationally fixed to the differential housing unit 140 unit of the differential gear. An outer ring 12 of the clutch unit 10 is arranged rotationally fixed to the drive wheel/planetary carrier 120. Notably, in an alternative embodiment, both rings 11, 12 can be connected directly or indirectly, e.g. via one or more gear wheels, with the differential housing 140 or the drive wheel/planetary carrier 120.

[0039] The clutch unit 10 further comprises first locking elements 13 and second locking elements 14 in form of (clutch) pawl elements 13, 14, wherein in the preferred embodiment, the first locking elements 13 provide counter clockwise locking (cf. FIGS. 8) and the second locking elements provide a clockwise locking (cf. FIGS. 9). A first displacement element and a second displacement element are provided for moving the first locking elements 13 and the second locking elements 14 between an active/engaged position, where the locking elements 13, 14 are moved into corresponding recesses 15, 16 provided in the outer ring 12, and an inactive/retracted position, where the locking elements 13, 14 are not arranged in the corresponding recesses 15, 16. As shown in FIGS. 3 to 5, in the shown embodiment, the locking elements 13, 14 are arranged at the inner ring 10 and the corresponding recesses 15, 16 are arranged at the outer ring 12.

[0040] The first displacement element and the second displacement element each comprise a drive element 17, 18, here in form of hydraulic cylinder arrangements 17, 18 and return elements 19, 20 in form of spring elements 19, 20. The drive elements 19, 20 are configured to move an actuating element 21, 22, here in form of two actuating rings 21, 22, of the displacement elements. Each hydraulic cylinder arrangement 17, 18 is assigned to push one of the actuating rings 21, 22 in a first position where the locking elements 13, 14 are positioned in an inactive/retracted position, wherein the spring elements 19, 20 pushed against the actuating ring 21, 22 such that the actuating rings are pushed in a second position where the locking elements 13, 14 are positioned in an active/ engaged position, once a respective hydraulic cylinder 17, 18 is set load-free. In an alternative embodiment, the drive element may be provided by means of electrical actuators. In a further example, the drive elements 17, 18 may be provided by means of only one actuator, wherein both actuating rings may be controlled via a single cam curve element.

[0041] In the shown embodiment, the two actuating rings 21, 22 are arranged between the inner ring 11 and outer ring 12, wherein one actuating ring 21 is assigned to the first locking element(s) 13, i.e. to move the first locking element(s) 13 between an active/engaged position and an inactive/retracted position, wherein the other actuating ring 22 is assigned to the second locking element(s) 14, i.e. to move the second locking element(s) 14 between an active/engaged position and an inactive/retracted position.

[0042] The actuating elements/actuating rings 21, 22 of the displacement elements, may comprise ramp-shaped cross-sections for moving/pushing the locking elements 13, 14 into the corresponding recess of a respective ring 11, 12.

[0043] By the provided structure, the clutch unit 10 provides four different modes shown in FIGS. 7 to 10. In a first mode of operation shown in FIGS. 7, no locking element 13, 14 engages a recess 15, 16 of the outer ring 12 so that both rings 11, 12 are independently rotatably provided.

[0044] In a second mode of operation shown in FIGS. 8, only the first locking elements 13 engages a corresponding recess 15 of the outer ring 12 to provide a rotationally fixed connection of the two rings 11, 12 in at least the first direction of rotation, here a counter clockwise direction.

[0045] In a third mode of operation shown in FIGS. 9, only the second locking elements 14 engages a corresponding recess 16 of the outer ring 12 to provide a rotationally fixed connection of the two rings 11, 12 in at least the second direction of rotation, here clockwise direction.

[0046] In a fourth mode of operation sown in FIGS. 10, the first locking elements 13 and the second locking elements 14 engage corresponding recesses 15, 16 of the outer ring 12 to provide a rotationally fixed connection of the two rings 11, 12 in the first direction of rotation and the second direction of rotation.

[0047] In an example, e.g. in an all-wheel driving vehicle comprising two electric motors, the steps for regulating the clutch unit 10 from a fully disconnected state, i.e. the first mode of operation, where one of the electric motors is disconnected from the drive line/load, into a fully connected state, i.e. the fourth mode of operation, may as following: (i) it is detected that the needed power requires the 2.sup.nd electric motor 110 to be connected to the drive line; (ii) the inverter is started up; (iii) the 2.sup.nd electric motor 110 speed ramp up; (iv) the clutch unit 10 is set to the second operation mode; (v) the 2n.sup.d electric motor 110 reaches wheel speed and the first locking elements 13, e.g. counter clockwise pawl element(s) 13, engage the outer ring 12 such that the 2.sup.nd electric motor 110 may apply a positive torque; (vi) the clutch unit 10 is set to the fourth mode such that the 2.sup.nd electric motor 110 may apply negative torque, i.e. can be operated in a regeneration mode.

[0048] Other variations to the disclosed embodiment can be understood and effected by those skilled in the art in practicing the claimed subject-matter, from the study of the drawings, the disclosure, and the appended claims. In the claims, the word “comprising” does not exclude other elements or steps and the indefinite article “a” or “an” does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims should not be construed as limiting the scope of the claims.

LIST OF REFERENCE SIGNS

[0049] 10 clutch unit [0050] 11 inner ring [0051] 12 outer ring [0052] 13 first locking elements/counter clockwise locking elements [0053] 14 second locking elements/clockwise locking elements [0054] 15 recesses for first locking elements [0055] 16 recesses for the second locking elements [0056] 17 first drive element/hydraulic cylinder arrangement [0057] 18 second drive element/hydraulic cylinder arrangement [0058] 19 first return element/spring element [0059] 20 second return element/spring element [0060] 21 first actuating element/actuating ring [0061] 22 second actuating element/actuating ring [0062] 100 drive unit [0063] 110 motor unit/electric motor unit [0064] 120 drive wheel/planetary carrier [0065] 130 gear wheel [0066] 140 differential housing unit [0067] 150 axis of rotation