A DEVICE IN A ROBOT ARM

摘要

A robot arm comprises an assembly (6) rotatable relative to a part (2) of the arm about an axis extending at an angle to a longitudinal axis of the arm part, said assembly comprising a drive unit (8) and a member (9) driven by the drive unit. A cable (35, 36) comprising one or more lines for communication of energy for driving and/or control purposes extends between the arm part (2) and the drive unit (8). The assembly (6) comprises an axle pin (13) rotatably supported relative to the arm part (2). The cable extends in a space (48) provided in the assembly and comprising a first part space (49) provided in the axle pin (13), the cable being coiled in screw-line-shape in said first part space, and a second part space (50), in which the cable extends from the first part space (49) to the drive unit. The two part spaces (49, 50) are separated from each other in a sealed manner by means of a separation element (51) which has first sealing members for adjoining sealingly to a wall delimiting the space and second members for sealed passage of the cable.