Driving unit

Drive unit according to at least one of the preceding claims characterised in that the electric motor is formed as a disc rotor motor (1, 1a, 1b) with a rotor disc (3, 3a) which is connected to a drive shaft (9), with at least one permanent magnet (7;

• 71-78) or fixed exciter coils (7a, 7b) and with a magnetic short circuit (5, 5a).

Drive unit according to at least one of the preceding claims characterised in that at least a part of the component parts (3, 3a, 5, 5a, 7, 7a, 7b, 9;

• 4, 6, 8, 10) of the drive components (electric motor 1, 1a, 1b and gearbox 2) is supported on alternate sides or serves as a supporting component part for positioning or supporting component parts (3, 3a, 5, 5a, 7, 7a, 7b, 9;
• 4, 6, 8, 10) of each other drive components (electric motor or disc rotor motor 1, 1a, 1b and gearbox 2) or the electronic control device (15) whereby in particular at least one component part of the electric motor (1, 1a, 1b), for example the drive shaft (9), the magnetic short circuit (5) or the motor side crankcase casing (11, 11a) additionally provides a mechanical function of the gearbox (2) and/or a mechanical component part, for example the gearbox side crankcase casing (12) provides a function of the electric motor (1, 1a, 1b) or the electronic control device (15).

Drive unit according to at least one of the preceding claims characterised in that the magnetic short circuit (5) has means for locating and positioning the at least one preferably tablet-formed circular ring segment shaped or circular ring shaped permanent magnet (7, 71-78).

Drive unit according to at least one of the preceding claims characterised in that the magnetic short circuit (5, 5a) after fixing the drive unit has at least in part a direct contact with the door inside panel, door module or support plate of a vehicle door (18).

Drive unit according to at least one of the preceding claims characterised in that the magnetic short circuit (5, 5a) is designed reinforced only in the flow-guiding region.

Drive unit according to at least one of the preceding claims characterised in that bearing sites for the drive core (8) of the reduction gearbox (2) are formed in the rotor disc (3, 3a) radially spaced from the drive shaft (9).

Drive unit according to at least one of the preceding claims characterised in that the hub (80) consists of a hub plate (800) injection moulded on the rotor disc (3, 3a), and of a hub cylinder (801) which surrounds the centre region of the drive shaft (9).

Drive unit according to at least one of the preceding claims characterised in that the motor side crankcase casing (11, 11a) consists of a ferromagnetic material and is part of the magnetic short circuit.

Drive unit according to at least one of the preceding claims characterised in that the drive shaft (9) forms both the motor shaft connected to the rotor disc (3, 3a) and the gearbox shaft connected to the drive core (8).

Drive unit according to at least one of the preceding claims characterised in that the gearbox side crankcase casing (12) has a bearing element (92) whose inner region supports the drive shaft (9) and on whose outer region (90) the driven hollow wheel (10) is mounted free of interaction.

Drive unit according to at least one of the preceding claims characterised in that the injection moulded plastics toothed spline (40) of the hollow wheel (4) fixed on the housing contains a conical water drainage channel (41) which sealingly adjoins an inner face of the driven hollow wheel (10) facing the electric motor (1).

Drive unit according to at least one of the preceding claims characterised in that the radially flexible ring (6) is geometrically shaped by the planetary wheels (81, 82) or on the elements connected to the hub (80) so that it engages in predeterminable manner with the counter teeth, more particularly in relation to the number of teeth engaging simultaneously in the counter teeth and to the engagement depth.

Drive unit according to at least one of the preceding claims characterised in that the electric motor (1) and gearbox (2) are clipped together in the assembled state.

Drive unit according to at least one of the preceding claims characterised in that the magnetic short circuit (5, 5a) and the permanent magnets (7;

• 71 to 78;
• 30a) consist in a combination of soft and hard magnetic material and are made entirely or in part in the injection moulding process.

Drive unit according to at least one of the preceding claims characterised in that the planetary wheels (81, 82) have hollow cylindrical bearing sleeves (87,88) made of sintered material and mounted about the axes (85, 86).

Drive unit according to at least one of the preceding claims characterised in that the axes (85, 86) of the planetary wheels (81, 82) are injection moulded on the hub (80).

Drive unit according to at least one of the preceding claims characterised in that the hub (80) has blade elements for forming an axial ventilator with which a cooling air current is sucked in from a dry space side of the drive unit, preferably the side of the electric motor (1), and discharged to a wet space side of the drive unit, preferably through the driven hollow wheel (10) and the gearbox side crankcase casing (12).

Drive unit according to at least one of the preceding claims for a cable window lifter of a motor vehicle characterised in that the driven hollow wheel is formed as a cable roller (10) and that the gearbox side crankcase casing (12) has openings (120) for passing through a window lifter cable (13).

Drive unit according to at least one of the preceding claims characterised in that Bowden cable supports (14) of a Bowden cable surrounding the window lifter cable (13) are connectable in any position directly with the gearbox side crankcase casing (12) whereby the cable mountings are formed on the cable drum (10) so that the window lifter cable (13) can be hung at the end of assembly.

Drive unit according to at least one of the preceding claims characterised in that the cable drum (10) and the radially flexible ring (6) form a function element.

Drive unit according to at least one of the preceding claims for an adjusting device in motor vehicle doors characterised in that the fixing of the drive unit on a door module is undertaken by a bayonet lock or by clip elements.

Drive unit according to at least one of the preceding claims characterised in that the components (1, 1a;

• 2;
• 15) of the drive unit can be fitted together in one assembly direction.

Drive unit according to at least one of the preceding claims characterised in that the base part (18, e.g. door panel, door module or other support, more particularly of an adjusting device for motor vehicles) holding the drive unit is ferromagnetic and the components (1, 1a, 2;

• 15) of the drive unit are connected to the base part (18) so that the base part (18) forms a part of the magnetic short circuit path.

Drive unit according to at least one of the preceding claims characterised in that the base part (18) is formed at least in part as a mechanically supporting part of the drive unit.

Drive unit according to at least one of the preceding claims characterised in that the magnetic short circuit (5, 5a) has fixing points for the motor side crankcase casing (11, 11a), gearbox side crankcase casing (12) and/or the base part (18) housing the drive unit.

Drive unit according to at least one of the preceding claims characterised in that the drive unit is connectable with the base part (18) so that semi conductor elements for supplying the electric motor can be connected thermally to the base part (18) which serves as the coolant body.

Drive unit according to at least one of the preceding claims characterised in that the drive components are connectable with the base part (18) so that the heat loss of the electric motor (1,1a, 1b) is discharged at least in part through the base part (18).