Gearbox
AssigneeZF Friedrichshafen AG
InventorFriedrich J. Ehrlinger
Life of this patent
Estimating the term…
Abstract
A multi-gear, manual transmission, especially for utility vehicles, with at least partially automatized gear shifting or with a manual gear shift, in which the gear synchronization is carried out by motor guidance and wherein the transmission possesses a forward shift-group, a main-shift-group and a post shift-group, whereby the pre-shift-group is designed as a planetary gear set (2P) and a support member of the planetary gear set is constructed as a friction brake, which is active in the slow gear-shift position and thereby assumes the function of a start-up clutch.
Claims19
A multi-gear manual transmission for a utility vehicle in which the gear synchronization is carried out by motor guidance and the multi-gear manual transmission possesses a forward shift-group, a main shift-group and a post shift-group, wherein the forward shift-group is a planetary gear set (2P) having a support member constructed as a friction brake, the friction brake functioning as a start-up clutch for the multi-gear manual transmission, also provided to the planetary gear set (2P) is a shape fit clutch which also by-passes said planetary gear set (2P).
A multi-gear manual transmission for a utility vehicle in which the gear synchronization is carried out by motor guidance and the multi-gear manual transmission possesses a forward shift-group, a main shift-group and a post shift-group, wherein the forward shift-group is a planetary gear set (2P) having a support member constructed as a friction brake, the friction brake functioning as a start-up clutch for the multi-gear manual transmission, and the friction brake of the forward shift-group planetary gear set (2P) is the only frictional engageable separating member of the manual transmission.
A multi-gear manual transmission for a utility vehicle in which gear synchronization is carried out by motor guidance, the multi-gear manual transmission having:
- a splitter group;
- a main shift-group;
- and
- a range group;
- wherein the splitter group is a planetary gear set (2P) having one component thereof constructed as a friction brake, and the friction brake, in a low gear-shift position, functions as a start-up clutch for the multi-gear manual transmission to transmit driving torque from the splitter group planetary gear set (2P′) to the main shift-group;
- and the friction brake of the splitter group is the only frictional engageable separating member of the multi-gear manual transmission.
Dependencies are inferred from the claim text.