DE10350938A1 - Electromechanical gear actuator for commercial and private vehicles has connection of selector spindle and shift spindle to shift finger created through positive locking arrangement - Google Patents

Abstract

The electromechanical gear actuator (1) comprises two electric motors (2,3) in parallel for the gear selecting and shifting which is through a shift finger (10). A selector spindle (4) is directly driven by one electric motor (2), and a shift spindle (5) and positioning sensing system are directly driven by the other motor (3). The connection of the selector and shift spindles to the shift finger is through a positive locking arrangement. The positioning sensing system for the selecting and shift positions is accommodated in the respective electric motor on account of the positive locking connection to the shift finger.

Description

The The present invention relates to an electromechanical transmission actuator according to the generic term of claim 1

electromechanical Gearbox actuators are used in vehicles with automated manual transmissions. These are commercially used vehicles, such as Vans or trucks but also for cars in sports applications or small cars. In these transmissions, the driver of the gear change relieved in the vehicle; It will be a whole more comfortable and safer Operation possible. Equipped with such transmissions vehicles usually have two Pedals (accelerator pedal and brake pedal), whereby the clutch pedal is omitted.

Usually is in the vehicle a drive switch for selecting the operating mode automatic mode, manual mode or reverse gear to disposal. Especially in the commercial vehicle sector, there are various solutions for automation of manual transmissions. As actuators for the gearbox be system dependent Used pneumatic or hydraulic cylinders or electric motors, the above Gear the dialing and switching devices drive. Actuators powered by electric motors represent particularly cost-effective Constructions. Electromechanical gearbox for the circuit a vehicle transmission are widely known. This is a Gearbox used with either the gearbox is developed or has adaptation elements attached to the transmission must be provided to interact with the transmission actuator.

Such a transmission actuator is eg from the EP 0 377 848 B1 known. There, an electromechanical transmission actuator is described which has two mutually perpendicular axes of movement. A single shift finger is guided by two electric motors on the axes of movement. In this case, the shift finger, moved by the first electric motor, engages on the first movement axis corresponding to a selection movement in each case an opening in the various, parallel juxtaposed shift rails. For switching a switching package connected to a respective shift rod, the shift rod is displaced in its longitudinal axis by the second electric motor by movement of the shift finger on the second movement axis.

As part of the DE 101 43 325 A1 the applicant is described an electromechanical transmission actuator, which comprises a first drive device for performing a selection movement of a switching device in a transmission housing of a transmission with a first electric motor, a second drive device for performing a switching movement of the switching device with a second electric motor and a controller for receiving sensor signals Processing the sensor signals and outputting control signals to the electric motors, in which the axes of rotation of the first and the second drive device are parallel to each other. Here, a spindle is provided for the selection movement and the switching movement, which is each driven directly by one of the electric motors. Further, a nut is provided for the switching movement on the spindle, which is arranged in a switching cylinder between two spring means which act in the direction of movement of the spindle and move their movement along the spindle, the switching cylinder in the direction of movement of the spindle. In this case, the sensors are arranged outside the housing, preferably on the housing of the transmission.

Of the present invention is based on the object, an electromechanical Specify gearbox, which requires a small space and a reliable one execution the desired Circuits enabled.

These The object is solved by the features of claim 1. Further Embodiments and advantages will become apparent from the dependent claims.

Therefore An electromechanical transmission actuator is proposed, comprising two parallel arranged electric motors for selecting or switching, wherein the Choose and switching over a shift finger takes place, one of the one electric motor directly driven selector spindle and a directly from the other electric motor driven switching spindle, whereby the connection of the dialing and switching spindle to the shift finger is positively.

By the concept of the invention can the position sensor for the dialing and switching position due to the positive connection to the shift finger and thereby to the corresponding selector or shift rail in an advantageous Way can be accommodated in the respective electric motor.

The Invention will be described below with reference to the accompanying figure, which is a plan view an embodiment a transmission actuator according to the invention represents, exemplary closer explained.

The transmission actuator according to the invention 1 according to the figure comprises two parallel electric motors 2 . 3 , which each have a spindle 4 . 5 drive. Here is the spindle 4 the selector spindle and the spindle 5 the switching spindle. From the selector spindle 4 becomes a ball nut 6 driven, in which a cutout is provided, which is formed in the cross-sectional shape as a circular section. The shift finger points. a corresponding counter-form, which engages positively in the cut-out. This positive connection is activated when the selector motor 2 the shift finger 10 moved axially.

When switching the selector motor 2 held in the actual position. The switching motor 3 sets the switching spindle 5 in rotation. On the switching spindle 5 is a ball nut 7 provided, the form-fitting with a fork or a fork element 8th connected is. This is the fork 8th a fixed pivot point in the main body. In the fork 8th there is a hole in which another fork 9 is rotatably mounted. The fork 9 is in the pivoting direction of the shift finger 10 positively connected to the shift finger.

According to the invention it can be provided that the electric motors 2 . 3 are electrically connected to the electrical system via a central plug.

The Electric motors can be mounted in such an advantageous manner on the actuator main body, that after installation in the vehicle transversely to the direction of travel are arranged, resulting in effective cooling by the wind.

Of the Gearbox according to the invention is particularly suitable for retrofitting in a transmission or vehicle to an existing transmission via a circuit automation to be able to operate.

1

transmission actuator

2

electric motor (Selector motor)

3

electric motor (Motor)

4

Wählspindel

5

switching spindle

6

ball nut

7

ball nut

8th

fork

9

fork

10

shift finger

Claims (3)

Electromechanical transmission actuator comprising two electric motors arranged in parallel ( 2 . 3 ) for selecting or switching, wherein the selecting and switching via a shift finger ( 10 ), one of the one electric motor ( 2 ) directly driven selector spindle ( 4 ) and one of the other electric motor ( 3 ) directly driven switching spindle ( 5 ) and position sensors for the selection and switching position, characterized in that the connection of the selector and switching spindle ( 4 . 5 ) to shift finger ( 10 ) takes place positively. Electromechanical transmission actuator according to claim 1, characterized in that the position sensors for the selection and switching position due to the positive connection to the shift finger in the respective electric motor ( 2 . 3 ) is housed. Electromechanical transmission actuator according to claim 1 or 2, characterized in that of the Wählspindel ( 4 ) a ball nut ( 6 ) is driven, in which a cutout is provided, into which a corresponding counter-shape of the shift finger ( 10 ) engages positively, whereby an axial movement of the shift finger ( 19 ) and that on the switching spindle ( 5 ) a ball nut ( 7 ) is provided, the form-fitting with a fork element ( 8th ), which has a fixed pivot point in the main housing, wherein in the fork element ( 8th ) a bore is provided, wherein a further fork ( 9 ) is rotatably mounted, in the pivoting direction of the shift finger ( 10 ) is positively connected to the shift finger.