Zf Friedrichshafen Ag

Roland Stauber

Hermann Lanz

Gerhard F&uuml;hrer

Friedrich J Ehrlinger

Gerhard Höring

Gerhard Führer

Marcus Raeder

An arrangement of the intermediate gear for a reverse gear () is proposed for a transmission with a drive shaft and an output shaft () arranged coaxially in relation to it and with one additional intermediate shaft () arranged parallel to the drive and output shafts () for a power take-off. The intermediate gear for the reverse gear () is driven by a shaft () and drives the output shaft (), in which the intermediate gear for the reverse gear () is arranged above an imaginary plane (A) extended through the axes of the driving shaft () and the output shaft () and, with a horizontal orientation of plane (A), the driving shaft () is located to the right of the output shaft () in the direction of travel.

Intermediate gear system for the reverse gear of a gearbox with power take-off

In a transmission ( ) for a motor vehicle with a main transmission part ( ) which possesses a plurality of gear steps and wherein, between each step a step-jump in the gear ratio is provided, and with a split transmission part ( ) for the separation of the step-jumps of the gear steps of the main transmission part ( ) and with an area group transmission part ( ) for the extension of the over-all gear ratio of the gear steps of the main transmission part with a slow and a rapid gear ratio area, the average gear step-jump of the upper gear steps is approximately at least 0.7% less than the geometric step-jump calculated theoretically from the total gear ratio.

Vehicle transmission with progressive stepping

Multi-speed step-change transmission for commercial vehicles having an one input shaft, a main shaft placed in an axial extension, one countershaft parallel thereto and one intermediate shaft parallel to the two shafts for the reverse gear and the shafts have gear wheels forming the ratio steps of the transmission. The sum of the tip radii of the intermediate gear ( ) for the reverse gear and of the main shaft gear ( ) for the first gear is smaller than the axial separation (a) between the main shaft ( ) and the intermediate shaft ( ).

Step-change gearbox

In the case of a vehicle transmission ( ) with two counter shafts placed in a transmission housing ( ) for the distribution of load, with one input shaft ( ) and one main shaft ( ) coaxially aligned with the input shaft ( ), a gear ( ) is placed in the area between the input shaft ( ) and the main shaft ( ). The gear ( ) is secured by a bearing ( ) between the input shaft ( ) and the main shaft ( ) and secured radially by bearings between the two counter shafts. The bearing ( ) constitutes the exclusive axial bearing between the input shaft ( ) and output shaft ( ). The axial bearing comprises two axial effective roller bearings ( ) which lie on opposed sides of a projection ( ) of the gear ( ).

Gearwheel bearing in gearboxes

The invention relates to a system of structural shapes to build a line of products having gears of different total ratio or a different number of ratio steps. Transmissions ( ) of vehicles consisting of three successively disposed partial gears ( ), a main gear part ( ), a multi-gear split gear part ( ) and a multi-gear group transmission ( ) have for the split gear part ( ) and the group transmission part ( ) and the gear steps of each main gear part ( ) in all structural shapes on all gear wheels ( ) the same number of teeth with at least those gear wheel pairs ( - - - - ) corresponding to the gear wheel pairs of the structural shape of the transmission ( ) having the least number of gear steps.

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Friedrichshafen, Germany

Roland Stauber