MARINE TRANSMISSION AND DRIVE ARRANGEMENT FOR A MARINE DRIVE

Abstract

A marine transmission (1) with a main driveshaft (3), a first intermediate shaft (4) and a drive output shaft (6), by way of which at least one propeller (21) can be driven. The marine transmission (1) has an electric machine (7), as an additional drive, a second intermediate shaft (5) and a planetary gear assembly (8). The electric machine (7) can be connected to the second intermediate shaft (5) by way of the planetary gear assembly (8). Also a drive arrangement for a marine transmission with a main drive motor (2) and with a marine transmission (1) of that type are disclosed.

Claims

1-8. (canceled)

9. A marine transmission comprising: a main driveshaft (3) that is connectable to a main drive motor (2), a first intermediate shaft (4), a second intermediate shaft (5), a drive output shaft (6) by way of which at least one propeller (21) is drivable, a drive output gearwheel (14), arranged on the drive output shaft (6), being engaged with a first driving pinion (11), a second driving pinion (12) and a third driving pinion (13), the first driving pinion (11) being connectable, by a first powershiftable clutch (15), to the main driveshaft (3), the second driving pinion (12) being connectable, by a second powershiftable clutch (16), to the first intermediate shaft (4), the third driving pinion (13) being rotationally fixedly connected to the second intermediate shaft (5), the marine transmission (1) comprising an electric machine (7), as an additional drive, and a planetary gear assembly (8), and the electric machine (7) being connectable to the second intermediate shaft (5) of the marine transmission (1) by the planetary gear assembly (8).

10. The marine transmission according to claim 9, wherein the first driving pinion (11), the second driving pinion (12) and the third driving pinion (13) all have a same number of teeth.

11. The marine transmission according to claim 9, wherein the marine transmission (1) comprises a shiftable clutch (10) by which the third driving pinion (13) is connectable to the electric machine (7).

12. The marine transmission according to claim 9, wherein a spur gear stage (9) is arranged between the planetary gear assembly (8) and the second intermediate shaft (5).

13. The marine transmission according to claim 12, wherein at least one of the planetary gear assembly (8) and the spur gear stage (9), respectively, are made as a separate structural unit.

14. The marine transmission according to claim 9, wherein the marine transmission (1) has a housing (17), and the housing (17) has a flange (18) for attaching the electric machine (7).

15. A drive arrangement for a marine transmission with a main drive motor (2) and with a marine transmission (1) according to claim 9.

16. A marine transmission comprising: a main driveshaft (3), first and second intermediate shafts (4, 5), a drive output shaft (6), the main driveshaft (3) being connectable to a main drive motor (2) which drives, via the drive output shaft (6), at least one propeller (21), a drive output gearwheel (14), arranged on the drive output shaft (6), being engaged with first, second and third driving pinions (11, 12, 13), the first driving pinion (11) being connectable, by a first powershiftable clutch (15), to the main driveshaft (3), the second driving pinion (12) being connectable, by a second powershiftable clutch (16), to the first intermediate shaft (4), the third driving pinion (13) being fixedly connected to the second intermediate shaft (5), the marine transmission (1) comprising an electric machine (7), as an additional drive, and a planetary gear assembly (8), and the electric machine (7) being connectable, via the planetary gear assembly (8), to the second intermediate shaft (5) of the marine transmission (1).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Below, the invention and its advantages are explained in greater detail with reference to the example embodiment illustrated in the attached FIGURE.

[0020] The sole FIGURE shows a schematic representation of a drive arrangement according to the invention, with a marine transmission.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] The drive arrangement shown in sole FIGURE comprises a marine transmission 1 with a main driveshaft 3, which is connected to a main drive motor 2 via a non-switchable coupling 19. The main driveshaft 3 is arranged coaxially with an output shaft of the main drive motor 2. The non-shiftable coupling 19 can consist essentially of two screw flanges bolted to one another, which are fixed permanently to the respective ends of the shafts with which they are associated. Typically the main drive motor 2 is in the form of an internal combustion engine and during most of the travel time serves as the source of drive power for propelling a vessel in which it is installed. Furthermore the marine transmission 1 comprises a first intermediate shaft 4, a second intermediate shaft 5 and a drive output shaft 6, which shafts in the present example embodiment are all arranged parallel to the main driveshaft 3. By way of the drive output shaft 6 a propeller shaft 20 with a propeller 21 fixed on it can be driven. For that purpose the drive output shaft 6 is connected to the propeller shaft 20 by a non-switchable coupling 22.

[0022] A drive output gearwheel 14 arranged on the drive output shaft 6 is permanently engaged with a first driving pinion 11, with a second driving pinion 12 and with a third driving pinion 13. The first driving pinion 11 can be connected to the main driveshaft 3 by a first powershiftable clutch 15. The second driving pinion 12 can be connected to the first intermediate shaft 4 by a second powershiftable clutch 16. In this example embodiment the first and second powershiftable clutches 15 and 16 are of identical design.

[0023] The third driving pinion 13 is connected in a rotationally fixed manner to the second intermediate shaft 5. In the present case the third driving pinion 13 is connected permanently to the second intermediate shaft 5. In this example embodiment the first, second and third driving pinions 11, 12, 13 are all of identical design, whereby their production costs are reduced.

[0024] On the marine transmission 1, an electric machine 7 is provided as an additional drive. The electric machine 7 can be connected to the second intermediate shaft 5 by way of a planetary gear assembly 8, and a spur gear stage 9 is associated with the second intermediate shaft 5, by virtue of which a still larger gear ratio is produced between the electric machine 7 and the drive output shaft 6.

[0025] The marine transmission 1 also comprises a shiftable clutch 10 by means of which the third driving pinion 13 can be connected to the electric machine 7. The shiftable clutch 10 can be activated by a control unit. In that way the additional drive-train with the electric machine 7 can be coupled and decoupled as necessary or in accordance with the operating mode desired. The shiftable clutch 10 is arranged in the housing 17 of the marine transmission 1 directly adjacent to the third driving pinion 13. This arrangement of the shiftable clutch 10 directly adjacent to the third driving pinion 13 has a further advantage. In the operating modes in which the electric machine 7 is decoupled from the drive output shaft 6, all the other components of the additional drive-train can remain static, for example the planetary gear assembly 8 and the spur gear stage 9. This contributes toward energy-saving operation.

[0026] The planetary gear assembly 8 and the spur gear stage 9 are each made as separate assemblies. In other words the basic transmission, the planetary gear system 8 and the spur gear stage 9 each have a respective partial housing 24, 25 and 26 of their own. Thus other drive arrangements as well, with the identical components, can be provided, which for example are configured without the spur gear stage 9. In that case the partial housing 24 of the planetary gear assembly 8 can be flange-mounted directly onto the partial housing 26 of the basic transmission.

[0027] The housing 17 of the marine transmission 1 accordingly comprises all the partial housings 24, 25 and 26. In other example embodiments the basic transmission, together with the planetary gear assembly 8 and the spur gear stage 9, can be accommodated in a common housing 17.

[0028] On the partial housing 24 of the planetary gear system 8, a flange 18 is provided for connecting the electric machine 7. In the present example embodiment, however, the flange is not used for flange-mounting the electric machine 7. Instead, in this case the electric machine 7 is positioned a distance away from the planetary gear assembly 8 and connected thereto by a non-shiftable coupling.

INDEXES

[0029] 1 Drive arrangement [0030] 2 Main drive motor [0031] 3 Main driveshaft [0032] 4 First intermediate shaft [0033] 5 Second intermediate shaft [0034] 6 Drive output shaft [0035] 7 Electric machine [0036] 8 Planetary gear assembly [0037] 9 Spur gear stage [0038] 10 Switchable clutch [0039] 11 First driving pinion [0040] 12 Second driving pinion [0041] 13 Third driving pinion [0042] 14 Drive output gearwheel [0043] 15 First powershiftable clutch [0044] 16 Second powershiftable clutch [0045] 17 Housing [0046] 18 Flange [0047] 19 Non-switchable coupling [0048] 20 Propeller shaft [0049] 21 Propeller [0050] 22 Non-switchable coupling [0051] 23 Non-switchable coupling [0052] 24 Partial housing [0053] 25 Partial housing [0054] 26 Partial housing