Abstract: A powertrain for a motor vehicle, with a differential planetary gear system, which has at least one ring gear with ring gear toothing, at least one sun gear with sun gear toothing, planetary gears which engage with the ring gear toothing on one side and with the sun gear toothing on the other side, and a planetary gear carrier, on which the planetary gears are rotatably mounted. The ring gear toothing and the sun gear toothing have the same number of respective gear wheel teeth.
Type:
Grant
Filed:
April 23, 2018
Date of Patent:
February 22, 2022
Assignees:
AUDI AG, Profiroll Technologies GmbH
Inventors:
Philipp Buratowski, Markus Heilmann, Michael Hirsch, Christian Weihmann, Peter Strehmel
Abstract: A powertrain for a motor vehicle, with a differential planetary gear system, which has at least one ring gear with ring gear toothing, at least one sun gear with sun gear toothing, planetary gears which engage with the ring gear toothing on one side and with the sun gear toothing on the other side, and a planetary gear carrier, on which the planetary gears are rotatably mounted. The ring gear toothing and the sun gear toothing have the same number of respective gear wheel teeth.
Type:
Application
Filed:
April 23, 2018
Publication date:
June 18, 2020
Applicants:
AUDI AG, Profiroll Technologies GmbH
Inventors:
Philipp BURATOWSKI, Markus HEILMANN, Michael HIRSCH, Christian WEIHMANN, Peter STREHMEL
Abstract: In the production of an internal contour with an internal arbor acting on the inner wall of a cup-shaped or annular rotationally symmetrical workpiece, expansion and length change of the workpiece are avoided during cold forming. Thus, gear components with internal teeth are produced that have greater symmetry and higher accuracy. A workpiece provided with a press fit on the outside or a prefabricated workpiece is inserted into the die, and during the cold forming is pressed tightly by friction and rotationally fixed with the rotationally driven internal arbor against the inner wall of the die. After completion of the rolling process of the profile, the workpiece is ejected with an axial ram. The internal arbor is provided with outside profiling and is cantilever-mounted and is fed axially and radially during the rolling.