Hydraulic or pneumatic actuating device for actuation of setting elements in a motor vehicle transmission

Patent metadata

Field	Value
Publication number	US-10337605-B2
Application number	US-201515328760-A
Country	US
Kind code	B2
Filing date	Jul 28, 2015
Priority date	Jul 31, 2014
Publication date	Jul 2, 2019
Grant date	Jul 2, 2019

Abstract

The invention relates to a hydraulic or pneumatic operating device for operating actuators in a motor vehicle transmission. At least two actuation cylinders are provided, each containing a cylinder housing. An actuation piston is guided therein along a cylinder axis in a longitudinally displaceable manner. Each actuation piston can be hydraulically or pneumatically loaded and is operatively connected to one of the actuators. The actuation cylinders are combined into a unit which can be flange-mounted on or in a transmission housing of the motor vehicle transmission. A sensor for detecting the position of a signal element arranged on each actuation piston is associated with each cylinder housing. An electrical interface, which is signal-connected to the sensors, is integrated in the unit, via which interface the sensors can be mutually contacted.

First claim

We claim:

1. A hydraulic or pneumatic actuating device for the actuation of setting elements in a motor vehicle transmission, comprising at least two actuating cylinders, each cylinder having a cylinder housing and an actuating piston, which is guided in the cylinder housing to be longitudinally displaceable along a cylinder axis and which can be acted on hydraulically or pneumatically and is operatively connected with one of the setting elements, wherein the actuating cylinders are formed as a unit which can be flange-mounted on or in a transmission casing of the motor vehicle transmission, wherein a sensor for positional detection of a signal element mounted on the respective actuating piston is associated with each cylinder housing, wherein an electrical interface which is in signal connection with the sensors and by way of which the sensors for positional detection can be contacted by common communication with said electrical interface that is integrated in the unit, and wherein in addition at least one sensor for rotational speed sensing at the motor vehicle transmission and/or a terminal for such a sensor is or are integrated in the unit and similarly disposed in signal connection with the electrical interface for the common contact-making such that all the sensors for positional detection and said at least one sensor for rotational speed can be in contact through said electrical interface.

2. An actuating device according to claim 1 , wherein the unit can be flange-mounted on or in the transmission casing of the motor vehicle transmission by way of a flange surface of a flange plate connecting the cylinder housings, and wherein the sensors, the terminal and the interface are in signal connection by way of a flexible circuit board which is placed on the side of the flange surface of the unit to follow the external contour of the cylinder housings.

3. An actuating device according to claim 2 , wherein the flexible circuit board on one side is equipped with the sensors and wherein each cylinder housing has at the outer circumferential side a receiving recess for one of said sensors and the other side of said flexible circuit board carries in the region of the sensors covers serving the purpose of protectively closing the receiving recesses with the sensors received therein.

4. An actuating device according to claim 2 , wherein each cylinder housing has at the outer circumferential side a receiving section, which is laterally bounded by two parallel longitudinal grooves facing one another, for the associated sensor, and wherein each sensor fitted to the flexible circuit board is surrounded on one and the same side of the flexible circuit board by a frame which is encapsulated together with the respective sensor and the flexible circuit board by means of a sealing material and has on mutually remote sides two parallel webs which extend transversely to the flexible circuit board and which are insertable into the longitudinal grooves at the receiving section of the respective cylinder housing so as to fix the associated sensor.

5. An actuating device according to claim 4 , wherein tongues for holding and guiding the flexible circuit board are integrally formed on the flange plate adjacent to the cylinder housings.

6. An actuating device according to claim 5 , wherein each of the actuating pistons is provided with a sensing projection on which a magnet as the signal element is mounted by injection-molded encapsulation by plastic material.

7. An actuating device according to claim 6 , wherein each cylinder housing is provided at the end thereof remote from the sensor with a housing projection for reception of a guide bushing in which a piston rod connected with the respective actuating piston is guided.

8. An actuating device according to claim 7 , wherein a rod seal co-operating with the piston rod and adjoined to the guide bushing in axial direction is also received in the housing projection, and wherein an annular cover mounted on the housing projection secures both the guide bushing and the rod seal in the housing projection.

9. An actuating device according to claim 2 , wherein tongues for holding and guiding the flexible circuit board are integrally formed on the flange plate adjacent to the cylinder housings.

10. An actuating device according to claim 2 , wherein each cylinder housing is provided at the end thereof remote from the sensor with a housing projection for reception of a guide bushing in which a piston rod connected with the respective actuating piston is guided.

11. An actuating device according to claim 10 , wherein a rod seal co-operating with the piston rod and adjoined to the guide bushing in axial direction is also received in the housing projection, and wherein an annular cover mounted on the housing projection secures both the guide bushing and the rod seal in the housing projection.

12. An actuating device according to claim 1 , wherein each of the actuating pistons is provided with a sensing projection on which a magnet as the signal element is mounted by injection-molded encapsulation by plastic material.

13. An actuating device according to claim 1 , wherein each cylinder housing is provided at the end thereof remote from the sensor with a housing projection for reception of a guide bushing in which a piston rod connected with the respective actuating piston is guided.

14. An actuating device according to claim 13 , wherein a rod seal co-operating with the piston rod and adjoined to the guide bushing in axial direction is also received in the housing projection, and wherein an annular cover mounted on the housing projection secures both the guide bushing and the rod seal in the housing projection.

Assignees

• Fte Automotive Gmbh
• FTE automotove GmbH

Inventors

• Macht Egid
• Stössel Roland
• Stöhr Reinhold
• Fecke Karin
• Fuchs Dietmar
• Reul Alexander
• Will Wilhelm
• Voigt Christian
• Heubner Wilhelm

Classifications

• F16H59/70

  dependent on the ratio established · CPC title

• F16H2061/308

  Modular hydraulic shift units, i.e. preassembled actuator units for select and shift movements adapted for being mounted on transmission casing · CPC title

• F16H61/0009 Primary

  Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units · CPC title

• F15B15/1461

  Piston rod sealings · CPC title

• F16H63/3023 Primary

  the final output mechanisms comprising elements moved by fluid pressure (band brake actuating mechanisms F16H63/3003) · CPC title