DOG CLUTCH AND DRIVE ARRANGEMENT

Abstract

Claw-type shifting mechanism (5) with a first sliding sleeve (17) and a fixed coupling element (19). In order to produce a passage, the first sliding sleeve (17) and the coupling element (19) each respectively have at least one recess (31, 35) and at least one web section (32, 36), in which the first sliding sleeve (17) and the coupling element (19) can be arranged together radially on the outside on a first shaft. The first sliding sleeve (17) can be displaced along the first shaft and the coupling element (19) can be connected firmly to the first shaft. The drive arrangement (1) comprises at least one drive machine, a transmission with a first shaft, a second shaft and a third shaft, a housing, and a claw-type shifting mechanism (5) of this type.

Claims

1-10. (canceled)

11. A claw-type shifting mechanism (5) comprising: a first sliding sleeve (17), and a fixed coupling element (19), wherein, in order to produce a passage (22), the first sliding sleeve (17) and the coupling element (19) each have at least one respective recess (31, 35) and at least one web section (32, 36), the first sliding sleeve (17) and the coupling element (19) are arranged together radially on an outside on a first shaft (7), and the first sliding sleeve (17) are displaceable along the first shaft (7) and the coupling element (19) is firmly connected to the first shaft (7).

12. The claw-type shifting mechanism (5) according to claim 11, wherein the first sliding sleeve (17) is shiftablable between a first shift position, in which a connection between the first shaft (7) and a housing (6) can be closed, a second shift position in which a connection can be released, a third shift position in which a connection between the first shaft (7) and a second shaft (8) can be closed, a fourth shift position in which a connection can be released, and a fifth shift position in which a connection between the first shaft (7) and a third shaft (9) can be closed.

13. The claw-type shifting mechanism (5) according to claim 11, wherein the claw-type shifting mechanism (5) comprises a shiftable second sliding sleeve (18), which is shiftable between a first shift position in which a connection between a drive machine (2) and the first shaft (7) can be closed, a second shift position in which a connection can be released, and a third shift position in which a connection between the drive machine (2) and a third shaft (9) can be closed.

14. The claw-type shifting mechanism (5) according to claim 13, wherein the passage formed (22) in the first shift position of the second sliding sleeve can be made free from load in order to enable the shifting of the first sliding sleeve (17).

15. The claw-type shifting mechanism (5) according to claim 13, wherein the second sliding sleeve (18) is mounted on the first sliding sleeve (17).

16. The claw-type shifting mechanism (5) according to claim 11, wherein the at least one recess (31) of the first sliding sleeve (17) can be accessed essentially in a radial direction and the at least one recess (35) of the coupling element (19) can be accessed essentially in the axial direction.

17. The claw-type shifting mechanism (5) according to claim 11, wherein the at least one web section (32) of the first sliding sleeve (17) extends essentially in an axial direction and the at least one web section (36) of the coupling element (19) extends essentially in the radial direction.

18. A drive arrangement (1) comprising at least one drive machine (2, 3), a transmission (4) with a first shaft (7), a second shaft (8) and a third shaft (9), and a housing (6), wherein the drive arrangement (1) comprises the claw-type shifting mechanism (5) according to claim 11.

19. The drive arrangement (1) according to claim 18, wherein the drive arrangement (1) comprises a first drive machine (2) and a second drive machine (3), and with the assistance of the claw-type shifting mechanism (5), shift steps of the transmission (4) can be powershifted.

20. The drive arrangement (1) according to claim 18, wherein the first shaft (7) is located within the second shaft (8) and the second shaft (8) is located within the third shaft (9).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Below, example embodiments of the invention are described in greater detail with reference to figures which show, schematically and as examples:

[0028] FIG. 1: A drive arrangement with two drive machines, a transmission and a claw cutch,

[0029] FIG. 2: A claw-type shifting mechanism, viewed in partial cross-section,

[0030] FIG. 3: A first sliding sleeve, a coupling element, a first clutch element, a second clutch element and a third clutch element of a claw-type shifting mechanism, viewed in three dimensions, and

[0031] FIG. 4: A first sliding sleeve, a coupling element, a first clutch element and a second clutch element of a claw-type shifting mechanism, viewed in three dimensions.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] FIG. 1 shows a powershiftable drive arrangement 1 for a motor vehicle with a first drive machine 2, a second drive machine 3, a transmission 4, a claw-type shifting mechanism 5 and a housing 6.

[0033] The drive machines 2, 3 are electric drive machines. The transmission 4 comprises a first shaft 7, a second shaft 8 and a third shaft 9, which form transmission inputs, and a transmission output 10. The transmission 4 has, for example, a first planetary gearset 11 with a sun gear, a planetary carrier and a ring gear, and a second planetary gearset 12 with a sun gear, a planetary carrier and a ring gear. The first shaft 7 serves to drive the sun gear of the second planetary gearset 12, the second shaft 8 serves to drive the planetary carrier of the first planetary gearset 11 and the ring gear of the second planetary gearset 12, and the third shaft 9 serves to drive the sun gear of the first planetary gearset 11. The first shaft 7 is fitted into the second shaft 8. The second shaft 8 is fitted into the third shaft 9. The shafts 7, 8 and 9 have, in each case, an end on the claw shifting mechanism side. The ends of the shafts 7, 8, 9 are arranged axially in sequence in such a manner that the shafts are each accessible in the radial direction.

[0034] The claw-type shifting mechanism 5 comprises a first clutch element 13, a second clutch element 14, a third clutch element 15 and a fourth clutch element 16, a first sliding sleeve 17, a second sliding sleeve 18 and a coupling element 19.

[0035] The first clutch element 13 is connected rotationally and axially fixed to the first shaft 7 and serves to enable a connection of the first sliding sleeve 17 to the first shaft 7. The second clutch element 14 is connected rotationally and axially fixed to the second shaft 8, and serves to enable a connection of the first sliding sleeve 17 to the second shaft 8. The third clutch element 15 is connected rotationally and axially fixed to the third shaft 9, and serves to enable a connection of the first sliding sleeve 17 to the third shaft 9. The fourth clutch element 16 is connected rotationally and axially fixed to the third shaft 9, and serves to enable a connection of the second sliding sleeve 18 to the third shaft 9.

[0036] With the help of a first actuator 20, the first sliding sleeve 17 can be shifted to a first shift position in which a connection between the first shaft 7 and the housing 6 is closed, a second shift position in which a connection is released, a third shift position in which a connection between the first shaft 7 and the second shaft 8 is closed, a fourth shift position in which a connection is released, and a fifth shift position in which a connection between the first shaft 7 and the third shaft 9 is closed. The sliding sleeve 17 can also be operated with only three shift positions, in which a connection between two components is formed.

[0037] With the help of a second actuator 21, the second sliding sleeve 18 can be shifted to a first shift position in which a connection between the first drive machine 2 and the first shaft 7 is closed, a second shift position in which a connection is released, and a third shift position in which a connection between the first drive machine 2 and the third shaft 9 is closed.

[0038] The coupling element 19 is connected rotationally and axially fixed to the first shaft 7. The first sliding sleeve 17 and the coupling element 19 interpenetrate one another in such a manner that with the help of the passage 22, both a mechanical power flow can take place, via the coupling element 19, and also the first sliding sleeve 17 can be made free from load and axially displaced for shifting purposes.

[0039] FIG. 2 shows a design version of the claw-type shifting mechanism 5 in a partially sectioned view. The figure shows the first clutch element 13, the second clutch element 14, the fourth clutch element 16, the first sliding sleeve 17, the second sliding sleeve 18 and the coupling element 19. In this representation the third clutch element 15 is not shown. FIG. 3 shows the first sliding sleeve 17, the coupling element 19, the first clutch element 13, the second clutch element 14 and the fourth clutch element 16 of the claw-type shifting mechanism 5, viewed three-dimensionally. FIG. 4 shows the first sliding sleeve 17, the coupling element 19, the first clutch element 13 and the second cutch element 14 of the claw-type shifting mechanism 5, viewed three-dimensionally.

[0040] The first sliding sleeve 17 has a sleeve-like shape with two end sections 23, 24, a central section 25, a first axial section 26, a second axial section 27 and three connecting sections 28, 29, 30 arranged axially in sequence. The connecting section 28 is associated with the housing 6 and is in the form of external teeth, the connecting section 29 is associated with the first shaft 7 and is in the form of internal teeth, and the connecting section 30 is associated with the second shaft 8 and is in the form of internal teeth. On its central section 25, the first sliding sleeve 17 has through-going recesses in the radial direction, such as 31, and web sections such as 32 which extend in the axial direction.

[0041] The coupling element 19 has an annular disk-like shape with two connecting sections 33, 34 arranged radially in sequence. The connecting section 33 is associated with the first shaft 7 and is in the form of internal teeth, while the connecting section 34 is associated with the second sliding sleeve 18 and is in the form of external teeth. Radially on the inside, the coupling element 19 has recesses, such as 35, that can be penetrated in the axial direction, and web sections such as 36 that extend in the radial direction.

[0042] The first axial section 26 of the first sliding sleeve 17 has a smaller outer diameter suitable for receiving the coupling element 19, which corresponds with some play to an inside diameter of the coupling element 19 at the web sections 36. The second axial section 27 of the first sliding sleeve 17 has a larger outer diameter, which corresponds with some play to an inside diameter of the coupling element 19 at the recesses 35. The web sections 32 of the first sliding sleeve 17 extend through the recesses 35 of the coupling element 19, while the web sections 36 of the coupling element 19 extend through the recesses 31 of the first sliding sleeve 17.

[0043] The first sliding sleeve 17 and the coupling element 19 are arranged together in axial sequence, radially on the outside in each case directly on the first shaft 7, with the coupling element 19 arranged on the central section 25 of the first sliding sleeve 17. The coupling element 19 is connected rotationally and axially fixed to the first shaft 7. The first sliding sleeve 17 is connected rotationally fixed to the first shaft 7 and can be axially displaced relative to the coupling element 19 and to the first shaft 7. For that purpose, the recesses 31 of the first sliding sleeve 17 have a length, in the axial direction, that corresponds at least to a shifting path between the first shift position and the fifth shift position.

[0044] The second sliding sleeve 18 has a sleeve-like shape and two connecting sections arranged axially in sequence. One connecting section is associated with the first drive machine 2 and is in the form of external teeth, whereas the other connecting section is associated with the coupling element 19 and the third shaft 9, and is in the form of internal teeth. The second sliding sleeve 18 is mounted in such a manner that it can be displaced axially and rotated relative to the first sliding sleeve 17.

[0045] The first clutch element 13 is connected rotationally and axially fixed to the first shaft 7 and serves to receive the first sliding sleeve 17. The second clutch element 14 is connected rotationally and axially fixed to the second shaft 8, and corresponds with the connecting section 30 of the first sliding sleeve 17. The fourth clutch element 16 is connected rotationally and axially fixed to the second shaft 8 and is connected to the second drive machine 3, and corresponds to a connecting section of the second sliding sleeve 18. The clutch elements 13, 14 and 16 can, in each case, be made structurally separately, or integrated, in particular as one piece with a shaft.

[0046] The passage 22 formed with the recesses 31 and web sections 32 of the first sliding sleeve 17 and the recesses 35 and web sections 36 of the coupling element 19 is designed with some play and can be made free from load in the first shift position of the second sliding sleeve 18 in order to enable the second sliding sleeve 18 to be shifted, whereas with the help of the coupling element 19 a mechanical drive power at the first drive machine 2 is supported, so that shifting steps of the transmission can be powershifted.

[0047] In other respects reference should be made to FIGS. 2 to 4 and for additional information to FIG. 1 and the associated description.

[0048] The expression “can” denotes optional features of the invention. Consequently, there are also further developments and/or example embodiments of the invention which, in addition or alternatively, embody the particular feature or features concerned.

[0049] From the combination of features disclosed herein, if needs be isolated features can also be picked out and used to make the most of a structural and/or functional relationship that may exist between the features in combination with other features for limiting the object of the claim.

INDEXES

[0050] 1 Drive arrangement [0051] 2 First drive machine [0052] 3 Second drive machine [0053] 4 Transmission [0054] 5 Claw-type shifting mechanism [0055] 6 Housing [0056] 7 First shaft, transmission input [0057] 8 Second shaft, transmission input [0058] 9 Third shaft, transmission input [0059] 10 Transmission output [0060] 11 First planetary gearset [0061] 12 Second planetary gearset [0062] 13 First clutch element [0063] 14 Second clutch element [0064] 15 Third clutch element [0065] 16 Fourth clutch element [0066] 17 First sliding sleeve [0067] 18 Second sliding sleeve [0068] 19 Coupling element [0069] 20 First actuator [0070] 21 Second actuator [0071] 22 Passage [0072] 23 End section [0073] 24 End section [0074] 25 Central section [0075] 26 First axial section [0076] 27 Second axial section [0077] 28 Connecting section [0078] 29 Connecting section [0079] 30 Connecting section [0080] 31 Recess [0081] 32 Web section [0082] 33 Connecting section [0083] 34 Connecting section [0084] 35 Recess [0085] 36 Web section