Patent ID: 7503438

Claim:
A transmission brake ( 1 ), for braking a transmission shaft ( 3 ), comprising: an outer toothing ( 10 ) rotationally fixed to an end of the transmission shaft ( 3 ); at least one first friction element ( 4 ) rotationally fixed on the outer toothing ( 10 ); and at least one second friction element ( 5 ) fixed to the inner toothing ( 11 ); the outer toothing ( 10 ) and the at least one first friction element ( 4 ) and the inner toothing ( 11 ) and the at least one second friction element ( 5 ) all being located within an aperture extending through the transmission housing wall ( 2 ); an actuation element ( 8 ) located within the aperture extending through the transmission housing wall ( 2 ) and engaging with one of the at least one friction element ( 4 ) and the at least one second friction element ( 5 ), when actuated, to exert an axial braking pressure against the at least one first friction element ( 4 ) and the at least one second friction element ( 5 ); and an electromagnetic actuation device ( 6 , 7 ) for actuating the actuation element ( 8 ) and the electromagnetic actuation device ( 6 , 7 ) being located within a brake housing ( 13 ) and fixed to the transmission housing wall coaxially with the aperture extending through the transmission housing wall ( 2 ).