Transmission device for a motor vehicle

Abstract

A transmission device for a motor vehicle includes a multi-speed transmission; a multidisc clutch assigned to the multi-speed transmission for changing gears of the multi-speed transmission, and an actuating device for actuating the multidisc clutch, wherein the actuating device has a wedge mechanism which is operatively connected with the multidisc clutch for actuating the multidisc clutch.

Claims

1. A transmission device for a motor vehicle, comprising: a multi-speed transmission; a multidisc clutch assigned to the multi-speed transmission for changing gears of the multi-speed transmission; an actuating device for actuating the multidisc clutch, said actuating device having a wedge mechanism which is operatively connected with the multidisc clutch for actuating the multidisc clutch, wherein the multi-speed transmission is constructed as an automatic transmission and having a first and a second shaft, wherein the multidisc clutch is adapted to establish a direct operative connection between the first and the second shaft of the multi-speed transmission and/or between the first shaft and a transmission housing of the multi-speed transmission; a further multidisc clutch, said multidisc clutch and said further multidisc clutch being a component of a multi-clutch, said further multidisc clutch being actuatable with the actuating device, wherein the further multidisc clutch is adapted to establish a direct operative connection between the first shaft and a further second shaft of the multi-speed transmission and/or between the second shaft and the transmission housing, wherein the wedge mechanism has a displaceable switching element and a setting element operatively connected with the multidisc clutch, and wherein the switching element and/or the setting element have at least one adjusting ramp; and a further setting element arranged on a side of the switching element opposite the setting element, said further setting element being operatively connected with the further multidisc clutch, wherein the setting element and/or the further setting element have at least one further adjusting ramp, wherein a simultaneous actuation of the multidisc clutch and the further multidisc clutch is realized by a rotary motion of the switching element, in such a way as to execute the changing of gears of the multi-speed transmission without interruption of traction.

2. The transmission device of claim 1, wherein the multi-speed transmission is constructed as a multi-clutch transmission, and wherein the multidisc clutch is adapted to establish a direct operative connection between an input shaft and an intermediate shaft of the multi-speed transmission.

3. The transmission device of claim 2, wherein the further multidisc clutch is adapted to establish a direct operative connection between the input shaft and a further intermediate shaft of the multi-speed transmission.

4. The transmission device of claim 1, wherein the adjusting ramp and/or the further adjusting ramp are a component of a ball ramp mechanism.

5. The transmission device of claim 4, wherein the ball ramp mechanism has at least one ball which contacts the adjusting ramp or the further adjusting ramp.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) Other features and advantages of the present invention will be more readily apparent upon reading the following description of currently preferred exemplified embodiments of the invention with reference to the accompanying drawing, in which:

(2) FIG. 1 shows a schematic representation of a transmission device for a motor vehicle; and

(3) FIG. 2 shows a schematic representation of an actuating device for a multi-speed transmission of the transmission device.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

(4) Throughout all the Figures, same or corresponding elements may generally be indicated by same reference numerals. These depicted embodiments are to be understood as illustrative of the invention and not as limiting in any way. It should also be understood that the figures are not necessarily to scale and that the embodiments are sometimes illustrated by graphic symbols, phantom lines, diagrammatic representations and fragmentary views. In certain instances, details which are not necessary for an understanding of the present invention or which render other details difficult to perceive may have been omitted.

(5) FIG. 1 shows a schematic representation of a transmission device 1. The transmission device has a multi-speed transmission 2, which in the here shown embodiment is constructed as a dual clutch transmission. Assigned to the multi-speed transmission 2 are, for changing gears, a multidisc clutch 3 and a further multidisc clutch 4. By means of the multidisc clutch 3 an operatively connection between an input shaft 5 of the multi-speed transmission 2 and an intermediate shaft 6 can be selectively created. Analogously, an operative connection between the input shaft 5 and a further input shaft 7 can be selectively established or interrupted. The intermediate shaft 6 and also the intermediate shaft 7 is respectively operatively connected with an output shaft 10 of the multi-speed transmission 2 via a gearwheel set 8 or 9. The multidisc clutch 3 and also the multidisc clutch 4 can be actuated by a here not further shown actuator 11.

(6) FIG. 2 shows a schematic representation of the actuator 11. The actuating device has a wedge mechanism for actuating the multidisc clutch 3 or 4. Concretely it is provided that the actuator 11 has a displaceable switching element 12, which is rotatably supported relative to a rotation axis 13. Further a setting element 14 and a further setting element 15 are provided which are displaceable in axial direction relative to the switching element 12 relative to the rotation axis 13. The setting element 14 is operatively connected with the multidisc clutch 3 and the setting element 15 with the multidisc clutch 4.

(7) Between the switching element 12 and the setting element 14 as well as between the switching element 12 and the setting element 15 a respective ball ramp mechanism 16 is provided. Each ball ramp mechanism 16 has one or multiple balls 17, which are arranged between the switching element 12 and the setting element 14 or 15. In addition adjusting ramps are formed on the switching element 12 and the setting element, which are here not further shown. The balls 17 interact with the adjusting ramps so that in a first position of the switching element 12 relative to the setting elements 14 and 15 or a first rotary angular position of the switching element 12 the setting element 14 and the setting element 15 are each in a first position. In its first position the setting element 14 is for example maximally displaced toward the switching element 12, while the setting element 15 in its first position is maximally displaced by the balls 17 away from the switching element 12.

(8) In a second position of the switching element 12 relative to the setting elements 14 and 15 or a second rotary angular position of the switching element 12 the inverse configuration can be provided, wherein the setting elements 14 and 15 are present in their second position. As a result of a displacement or rotational movement of the switching element 12 thus a simultaneous actuation of the multidisc clutches 3 and 4 can be realized. Because the displacement of the switching element 12 is preferably accomplished electrically energy is only expensed during a gear change of the multi-speed transmission 2. The provision of support energy, for example in the form of hydraulic pressure, is also not required. Ideally the forces exerted by multidisc clutches 3 and 4 on the setting elements 14 and 15 and the torques caused by the setting elements on the switching element 12 compensate each other.

(9) While the invention has been illustrated and described in connection with currently preferred embodiments shown and described in detail, it is not intended to be limited to the details shown since various modifications and structural changes may be made without departing in any way from the spirit of the present invention. The embodiments were chosen and described in order to best explain the principles of the invention and practical application to thereby enable a person skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated.

(10) What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims and includes equivalents of the elements recited therein: