Single Shaft Shifting EWS

Assembly of EWS shifting animation (6,04 MB)

General

The Single Shaft Shifting (EWS) is a new shifting system of the inner gear shift for the application of manual and automated transmissions. Its compact construction with a low number of components allows shifting operations with high shifting comfort in narrow transmission manufacturing rooms.

The advantages & benefits of the EWS are:

• improved shiftability
• flexible arrangement of the actuation unit
• low production costs
• simple and compact construction; therefore particularly suitable for a six-speed transmission.

Technical Description

Design:

The basic item of the EWS consists of the selector shaft - mounted to the gearbox with oriented grooves - and a shift fork with suspension element per synchroniser. Compared to conventional inner gear shifts the EWS can operate without separate bearings and shift fork guidance inside the transmission. The shift forks of the EWS with engaging suspension elements, designed as gearshift sleeves, are space-saving and can be relocated manually on the selector shaft.

Function:

The selector shaft represents the central control element of the inner gear shift. The target gutter can be selected by its torsion, the target gear by its displacement.

Depending on the angle position of the selector shaft the suspension element of the target gutter engages in the selector shaft and flanges the accordant shift-fork with the selector shift. At the same time the other suspension elements remain inactive and adjust the associated shift fork to the gearbox to prevent faulty operations.

In neutral position the selector shaft is twistable and displaceable with all suspension elements so the next target gutter and another gear can be chosen.

The figures "Shifting principle on the selector shaft of the EWS" and "Selector shaft of the EWS" show the functionality of the EWS in the principle scheme.

Shifting principle on the selector shaft of the EWS

Selector shaft of the EWS