Zf Friedrichshafen Ag

Ralf Boss

Gerhard Gumpoltsberger

Hans-Peter Freudenreich

Bernd Unseld

Johannes Sorg

Henning Sonnenburg

Achim Klumpp

A drive mechanism () for a tracked vehicle. The drive mechanism includes an electric drive motor () for supplying drive power and an electric steering motor () for supplying steering power. Mechanical drive elements () transmit reactive power between a right-hand drive side () and a left-hand drive side () when driving around a curve or bend. An electric auxiliary motor () selectively assists either the drive motor () or the steering motor ().

Drive device for a tracked vehicle

A tracked vehicle () with a drive engine () for providing mechanical drive power, with a gearshift transmission () coupled to the drive engine () and with at least one steering gear system () coupled to the final drives (A) of each track (A). At least one pump () supplies hydraulic power to at least one hydraulic motor (A) of the steering gear system (). The drive engine (), the gearshift transmission () and the pump () are arranged as a drive unit () separately from the steering gear system ().

Crawler-type vehicle

A transmission having gearsets (P-P), shafts (-) and shifting elements (). Shaft () couples an input and carrier of gearset (P), shaft () couples the output and carriers of gearsets (P, P), shaft () couples the ring gear of gearset (P) and the sun gear of gearset (P), shaft () couples the ring gear of gearset (P) and the sun gear of gearset (P), shaft () couples the ring gear of gearset (P), shaft () couples the sun gear of gearset (P) and the ring gear of gearset (P), shaft () is connected to the sun gear of gearset (P), and shaft () is connected to the carrier of gearset (P). Shafts (and) can each engage housing (G) by way of respective brakes (), clutches () can couple, respectively, shafts ().

Multi-stage gearbox

Multi-stage transmission having six or seven forward gears and three reverse gears comprises three planetary gear sets (P, P, P), six rotatable shafts (), as well as six shifting elements (), whereby the shaft () is permanently connected to input element (An) and to the sun gear of the second planetary gear set (P), the shaft () is permanently connected to the output element (Ab) and the ring gear of the third planetary gear set (P), the shaft () is permanently connected to the ring gear of the second planetary gear set (P), the shaft () is permanently connected to the web of the third planetary gear set (P), the shaft () is permanently connected to the ring gear of the first planetary gear set (P), to the web of the second planetary gear set (P), and to the sun gear of the third planetary gear set (P), the shaft () is permanently connected to the web of the first planetary gear set (P), whereby the sun gear of the first planetary gear set (P) is connected torque-proof to a transmission housing (G), whereby the shafts (), () can be connected via a brake (,) to a transmission housing (G), and whereby the clutch () detachably connects the shaft () to the shaft (), the clutch () detachably connects the shaft () to the shaft (), the clutch () detachably connects the shaft () to the shaft (), and whereby a further clutch () is provided, via which the shaft () is detachably connected to the shaft (), the shaft () is detachably connected to the shaft (), or the shaft () is detachably connected to the shaft ().

Growing community of inventors

Kressbronn, Germany

Ralf Boss