Patent ID: 7444896

Claim:
A shifting device for shifting a transmission, the shifting device comprising: an axially slidable shifting shaft ( 2 ) supporting a plurality of shifting forks ( 8 , 10 , 12 , 14 ) which are each one of axially slidable relative to the shifting shaft ( 2 ), when the shifting fork ( 8 , 10 , 12 , or 14 ) is blocked, and carried axially along with the shifting shaft ( 2 ), when the shifting fork ( 8 , 10 , 12 , 14 ) is selected, for carrying out a desired shift; a selection apparatus ( 28 , 30 , 32 , 42 , 44 , 46 ) for selecting a desired one of the plurality of shifting forks ( 8 , 10 , 12 , 14 ) which moves axially along with the shifting shaft ( 2 ) and carries out the desired shift; and at least one blocking apparatus ( 52 ) for preventing movement of non-selected shifting forks ( 8 , 10 , 12 , 14 ) while allowing axial movement of the selected desired one of the plurality of shifting forks ( 8 , 10 , 12 , 14 ) along with the shifting shaft ( 2 ); wherein elements ( 2 , 8 , 10 , 12 , 14 , 20 , 22 ) for carrying out the shift are manufactured from a material which has a relatively high structural strength while elements of the selection apparatus ( 28 , 30 , 32 , 42 , 44 , 46 ) and the at least one blocking apparatus ( 52 ) are manufactured of a material which has a less structural strength than the elements ( 2 , 8 , 10 , 12 , 14 , 20 , 22 ) for carrying out the shift.