Synchronizing device
In a synchronizing device with a synchronizing body, a sliding sleeve for coupling the sliding body to a gear wheel, two synchronizing rings for rotational speed matching between the synchronizing body and the gear wheels, and a pivotable balancing lever having opposite arm extending into support openings in the synchronizing rings, the balancing levers are pivotable about a central axis so as to permit limited rotation of the synchronizing rings relative to the synchronizing body.
1 . A synchronizing device comprising a synchronizing body ( 1 ), a sliding sleeve ( 21 ) for coupling the synchronizing body ( 1 ) to a gearwheel, two synchronizing rings ( 2 , 3 ) for rotational speed matching between the synchronizing body ( 1 ) and the gearwheel, a pressure piece ( 4 ) and a compression spring ( 20 ) which presses a catch body ( 14 ) of the pressure piece ( 4 ) against the sliding sleeve ( 21 ), and a pivotably supported balancing lever ( 5 ) having opposite arms which are engaged in the peripheral direction ( 10 or 11 ) by the respective synchronizing rings ( 2 , 3 ), said balancing lever ( 5 ) being pivotable about the central axis ( 15 ) of the compression spring ( 20 ) or of the catch body ( 14 ).
2 . A synchronizing device according to claim 1 , wherein the pressure piece ( 4 ) is a shaped sheet-metal part which forms an assembly unit captively accommodating the compression spring ( 20 ) and the catch body ( 14 ).
3 . Synchronizing device according to claim 2 , wherein the shaped sheet-metal part forms a spring guide cylinder ( 22 ) which is aligned in an engagement direction of the catch body ( 14 ), the balancing lever ( 5 ) being mounted pivotably on the spring guide cylinder ( 22 ).
4 . Synchronizing device according to claim 3 , wherein the catch body ( 14 ) is mounted on the spring guide cylinder ( 22 ) of the shaped sheet-metal part with pre-stress.
5 . A synchronizing device according to claim 1 , wherein the balancing lever ( 5 ) has a fiber-reinforced plastic region.
6 . A synchronizing device according to claim 1 , wherein the balancing lever ( 5 ) includes arms ( 16 , 17 ) which are received in recesses ( 18 , 19 ) formed in stop noses ( 8 , 9 ) of the synchronizing rings ( 2 , 3 ), the stop noses being received in grooves ( 7 ) of the synchronizing body ( 1 ), so that rotational movement of both synchronizing rings ( 2 , 3 ) is limited in relation to the synchronizing body ( 1 ) in both peripheral directions ( 10 , 11 ).
7 . A synchronizing device according to claim 1 , wherein the balancing lever ( 5 ) forms the peripheral stop for the synchronizing rings.
8 . A synchronizing device according to claim 1 , wherein the pressure piece (receiver 125 ) is made in one piece with the balancing lever ( 5 ) and has rounded lateral surfaces ( 180 , 181 ) which allow pivoting of the pressure piece (receiver 125 ).