This application is a national stage completion of PCT/EP2006/005416 filed Jun. 7, 2006, which claims priority from German Application Serial No. 10 2005 026 475.1 filed Jun. 9, 2005.
The invention relates to a vehicle transmission.
Vehicle transmissions today comprise a plurality of components that correspond to different functions, which makes the design of transmissions elaborate and expensive, particularly when actuators to activate shifting elements must be integrated in or on the transmission, as is the case in automatic transmissions.
A vehicle transmission is known from the Applicants DE 44 22 900 A1 which comprises a connection plate attached to the transmission housing. The plate is arranged in an area of the housing that extends toward a clutch mechanism, with parts of a gear brake arranged in the connection plate.
In addition, a vehicle gearbox is known from the Applicants DE 103 47 493 A1 in which a connection plate is also provided in which accommodations for at least parts of the actuating elements for actuating the torque-transmitting components are provided. Here, the pneumatic actuating cylinder for a shift device of the gearbox comprises a first cylinder part that is provided in the connection plate and a second cylinder part that is provided in the gearbox housing. A piston is displaceably arranged in the actuating cylinder, the piston having a functional connection with a shift rod of the gearbox. In this design, a stop ring is provided in the cylinder, the stop ring preventing further displacement of the piston, which is displaceably arranged in the cylinder, to positions that do not correspond to any cylinder position.
With this design, it has proven disadvantageous that the configuration of the sealing contact surfaces of the piston inside the transmission housing results in casting difficulties.
It is the object of the present invention to provide a vehicle transmission in which the transmission comprises a region in which a connection plate is provided that can be firmly connected to the housing, the connection plate having receiving areas for at least parts of the actuating elements for actuating the torque-transmitting components and/or parts of the actuating elements for actuating the shifting elements of the transmission, where the demands on the surface quality of the housing and the connection plate are reduced, compared to the design known from DE 103 47 493 A1.
Accordingly, a vehicle transmission is proposed in which the housing comprises a region in which a provided connection plate is firmly attached to the housing; the connection plate comprising accommodations for at least parts of the actuating elements, which actuate the torque-transmitting components and/or parts of the actuating elements, which actuate the shift device of the transmission, where the at least one required actuating cylinder is formed by a first cylinder part that is provided in the connection plate and by a second cylinder part that is provided in the transmission housing, and the stop ring provided inside the cylinder is configured such that the sealing contact surfaces of the piston in the transmission housing and/or in the connection plate are formed by a bushing-shaped expansion of the stop ring.
By way of the inventive expansion of the stop ring around the sealing contact surface, it is possible to reduce the demands on the surface quality of the housing and the connection plate, whereby the manufacture of the stop ring is not problematic in terms of casting technique. In addition, the costs of waste from manufacturing errors are considerably reduced.
The invention will now be described, by way of example, with reference to the accompanying drawings in which:
In the
As is apparent from
According to the invention, the stop ring 10 is configured in such a way that the sealing contact surfaces of the piston 2 in the transmission housing 5 and/or in the connection plate 7 are formed by a bushing-shaped expansion 10′ or, as the case may be, 10″ of the stop ring 10.
The subject matter of
Any design embodiment, in particular any spatial configuration of the components of the inventive transmission, in particular the cylinder and the piston that is displaceably arranged in the cylinder, as such or in relation to each other, and as far as is technically meaningful, falls under the scope of protection of the present claims, without influencing the function of the transmission as it is described in the claims, even when these designs are not explicitly presented in the Figures or the description.
Number | Date | Country | Kind |
---|---|---|---|
10 2005 026 475 | Jun 2005 | DE | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/EP2006/005416 | 6/7/2006 | WO | 00 | 11/29/2007 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2006/131331 | 12/14/2006 | WO | A |
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Number | Date | Country |
---|---|---|
945 609 | Feb 1954 | DE |
1 155 348 | Oct 1963 | DE |
31 10 855 | Oct 1982 | DE |
3702911 | Aug 1988 | DE |
44 22 900 | Nov 1994 | DE |
103 47 493 | May 2005 | DE |
1 247 031 | May 2003 | EP |
888036 | Jan 1962 | GB |
Number | Date | Country | |
---|---|---|---|
20090308193 A1 | Dec 2009 | US |