Transmission drive unit having a self-locking device

A transmission drive unit (10), comprising:

• a drive motor (12);
• and
• a transmission (14) which is driven by the drive motor, the transmission (14) having an output element (70) and a self-locking device (60) with a locking element (62, 55), and the locking element (62, 55) locking the transmission (12) for torques which are introduced into the transmission (12) by the output element (70),
• characterized in that the transmission (12) is configured with transmission toothing (47) and a motor shaft bearing (32, 28) in a manner which is optimized with respect to the degree of efficiency with minimum friction, and the drive motor (12) has, as an exciter magnet, a sleeve-shaped toric magnet (18) which is arranged in a pole pot (16) which forms a magnetic yoke,
• characterized in that the pole pot (16) is connected to the transmission housing (36) by means of plastic material forming (94), and is pushed onto a sleeve-shaped axial projection (38) of the transmission housing (36).

A transmission drive unit (10), comprising:

• a drive motor (12);
• and
• a transmission (14) which is driven by the drive motor, the transmission (14) having an output element (70) and a self-locking device (60) with a locking element (62, 55), and the locking element (62, 55) locking the transmission (12) for torques which are introduced into the transmission (12) by the output element (70),
• characterized in that the transmission (12) is configured with transmission toothing (47) and a motor shaft bearing (32, 28) in a manner which is optimized with respect to the degree of efficiency with minimum friction, and the drive motor (12) has, as an exciter magnet, a sleeve-shaped toric magnet (18) which is arranged in a pole pot (16) which forms a magnetic yoke,
• characterized in that a wrap spring (55) of the self-locking device (60) comes to bear with its external diameter (42) against the inner wall (52) of the transmission housing (36) and is connected, directly, by way of its ends (56) to the worm gear (46) and the output element (70).

A transmission drive unit (10), comprising:

• a drive motor (12);
• and
• a transmission (14) which is driven by the drive motor, the transmission (14) having an output element (70) and a self-locking device (60) with a locking element (62, 55), and the locking element (62, 55) locking the transmission (12) for torques which are introduced into the transmission (12) by the output element (70),
• characterized in that the transmission (12) is configured with transmission toothing (47) and a motor shaft bearing (32, 28) in a manner which is optimized with respect to the degree of efficiency with minimum friction, and the drive motor (12) has, as an exciter magnet, a sleeve-shaped toric magnet (18) which is arranged in a pole pot (16) which forms a magnetic yoke,
• characterized in that the diameter (44) of the drive shaft (22) is 6 mm and the worm (40) is roll formed onto the drive shaft (22) and has a greater external diameter (42) than the diameter (44) of the drive shaft (22).