| 摘要 |
The invention relates to a pivot joint (4) for a support arm, comprising a first tube part (1) having a longitudinal axis, a second tube part (6), one end of which is rotatably mounted and extends into the first tube part, and provided with an electric motor attached in the first or second tube part, the first tube part and the second tube part being coupled to one another by means of a transmission, the transmission being provided with a drive shaft (50), driven by means of the electric motor (19) and in line with the longitudinal axis and with a first ring (41) with internal toothing (43) thereon and which is connected to the one tube part, an eccentric gear wheel (45) with a toothing (54) which is at least one tooth smaller than the internal toothing of the first ring and the toothing of which engages with the internal toothing of the first ring and which is provided with driver parts (47), and a second ring (40) which is connected to the other tube part and which is provided with driver parts (51) mating with the driver parts of the gear wheel, as a result of which the first and second ring rotate with respect to one another when the electric motor is in operation. The invention further relates to a support arm comprising such a pivot joint. |
