Device for reducing rattling noises in variable-speed transmissions

A variable-speed transmission having an assembly for reducing rattling noise in the variable-speed transmission, the assembly for reducing rattling noises in the variable-speed transmission comprising:

• a main shaft (1),
• two countershafts, and
• a plurality of loose gearwheels (3) being supported for rotation about the main shaft (1) and having a radial gap relative to the main shaft (1), a transmission gear being engaged when a respective loose gearwheel (3) is rotationally fixed to the main shaft (1), at least one gearwheel, of the plurality of loose gearwheels (3) of the variable-speed transmission, being supported by at least one roller bearing (4) so as to be rotatable with the main shaft (1), a ring gap (6) radially separating an outer bearing ring (4d) of the roller bearing (4) from a transmission housing (23) to provide radial movement between the at least one roller bearing (4) and the transmission housing (23), and the roller bearing (4) being axially braced, relative to the transmission housing (23), by at least one spring element (5) which applies an axial force against an outer bearing ring (4d) of the roller bearing (4) so that the movements and vibrations, made possible by the radial gap, are damped, and
• an inner bearing ring (4c) of the roller bearing (4) being located adjacent to and only engaging with the loose gearwheel (3) so as not to be in direct contact with any other support means for the roller bearing (4) while permitting axial movement of the loose gearwheel (3) relative to the roller bearing (4) during operation of the variable-speed transmission.

An assembly for reducing rattling noises in a variable-speed transmission, the assembly comprising:

• a main shaft (1),
• two countershafts, and
• at least one loose gearwheel (3) being supported for rotation about the main shaft (1) and the at least one loose gearwheel (3) being spaced radially relative to the main shaft (1),
• a transmission gear being engaged when the at least one loose gearwheel (3) is rotationally fixed to the main shaft (1), the at least one loose gearwheel (3) of the variable-speed transmission being supported by at least one roller bearing (4) so as to be rotatable with the main shaft (1),
• a gap (6) radially separating the at least one roller bearing (4) from a component (23) that is fixed in relation to a transmission housing to provide radial movement between the at least one roller bearing (4) and the component (23), and the at least one roller bearing (4) being axially braced, relative to the component (23) that is fixed in relation to the transmission housing, by at least one spring element (5) which applies an axial force on the at least one roller bearing (4) for dampening radial movement of the at least one bearing, and
• an inner bearing ring (4c) of the roller bearing (4) being located adjacent to and only engaging with the loose gearwheel (3) such that the inner roller bearing ring of the roller bearing is free from direct contact with any other support means for the roller bearing (4) while permitting axial movement of the loose gearwheel (3) relative to the roller bearing (4) during operation of the variable-speed transmission.