| 摘要 |
Motorized reduction gear (16) intended for functional equipment of motor vehicles, such as window lifters, sunroofs or seats, comprising a rotor provided with a rotor shaft (5) bearing a commutator (6) and passing through a rolling bearing (7) housed in a support (18) of a reduction gearbox (9) in which the said shaft is placed, a worm (11) of the shaft engaging with a gearwheel housed in the reduction gearbox; a seal (17) is inserted between the bearing and the bearing support, on the side of the bearing close to the inside of the reduction gearbox. An annular housing (19), the profile of which is adapted to receive the seal (17) resting on a spherical surface (12) of the bearing (7), is arranged in the wall of the bearing support (18). The presence of the seal (17) prevents any leak of lubricant out of the gearbox (9) thus ensuring a better longevity of the brushes (15) of the commutator (6).
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