US 4,145,935 AGranted

Multispeed reversible transmission shiftable under load

AssigneeZahnradfabrik Friedrichshafen AG

InventorWerner Herlitzek

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Abstract

A multispeed reversible transmission shiftable under load having fixed rotation axes for a plurality of gears and respective clutches. The basic structure of the transmission comprises an input gear which forms a gear train for second and third gears each of which is rotatable upon one of the aforementioned fixed axes and is connected by a respective direction clutch (forward or reverse clutch) with fourth and fifth gears also rotatable upon the respective fixed axes and meshing with one another. These fourth and fifth gears are connected by first and second speed-changing clutches with sixth and seventh gears, respectively, locatable about the first and second fixed axes, an eighth gear being connected to the seventh gear and rotatable about the second fixed axis. The ninth gear meshes with the eighth gear and is rotatable about the third fixed axis and is connectible via the third speed-changing clutch with the tenth gear which meshes with the fifth gear but is rotatable about the third fixed axis. An output (eleventh) gear is connected to the ninth gear and drives the output shaft.

Claims8

Dependent claims

A multispeed reversible transmission shiftable under load, comprising:

a transmission housing defining a first, a second and a third fixed axes;
a first gear on said housing connected to a driving source;
second and third gears in said housing forming a gear train with said first gear, two of the gears of said train being driven in the same sense and rotating about said first and said second axis, respectively;
a pair of direction clutches disposed along said first and said second axes, respectively, and connecting fourth and fifth gears respectively, with corresponding gears of said two gears of said train, said fourth and fifth gears meshing directly with one another;
first and second speed-changing clutches disposed along said first and second axes and respectively connecting said fourth and fifth gears to sixth and seventh gears rotatable about said first and second axes, respectively, said sixth and seventh gears meshing directly with one another;
an eighth gear rotatable about said second axis and connected with said seventh gear for angular displacement therewith;
a ninth gear rotatable about said third axis and meshing with said eighth gear;
a third speed-changing clutch connecting said ninth gear with a tenth gear rotatable about said third axis and meshing with said fifth gear;
and
a thirteenth gear meshing with said ninth gear and constituting a load-driving output element of said transmission.

7 more elements

Dependencies are inferred from the claim text.