Patent Number: 9,970,541

Title: Gear box for a working machine and a method for controlling a gear box

Abstract: A gear box for a working machine is arranged to be positioned in a first set of speed-changing gears and a second set of speed-changing gears. The gear box includes a gear box housing, an input shaft configured to receive torque, and an output shaft for supplying torque out, from the gear box, wherein the output shaft is connected to a planetary gear set of the gear box, a friction disc clutch arrangement which is arranged between a ring gear of the planetary gear set and the gear box housing for enabling connection of the ring gear to the gear box housing, and a control unit configured to controllably alternate the friction disc clutch arrangement between: an engaged state and an at least partially engaged state when the gear box is positioned in the first set of speed-changing gears, and between a disengaged state and an at least partially engaged state when the gear box is positioned in the second set of speed-changing gears. A corresponding method for controlling a gear box is also provided.

Inventors: Strandberg; Jonny (Eskilstuna, SE), Stalberg; Daniel (Eskilstuna, SE), Brattberg; Bjorn (Torshalla, SE)

Assignee: Volvo Construction Equipment AB

International Classification: F16H 37/04 (20060101); F16H 57/04 (20100101); F16H 61/70 (20060101); F16H 3/00 (20060101); F16H 61/00 (20060101)

Expiration Date: 2022-05-15 0:00:00