| 摘要 |
1. Wrist for an industrial robot with a housing (12) arranged at the end of the free arm (11) of the robot, with a first and a second disc-shaped unit (16, 19) turnable about a transverse axis X into a predetermined angular position with the help of a driving means, and with a tool holder (26) or the like supported by said first unit and rotatable arranged at the outer end of a shaft (25) extending radially to the X axis, the other end of the shaft being provided with a bevel gear (27) fixed thereto and being engaged with a driving bevel gear (30) supported by said second unit (19) the axial position of the bevel gear (30) being settable for adjusting the play between the bevel gears, characterized in that the second unit (19) consists of two main components the first component (31) being rotatable arranged in the housing (12) and connected to a drive means (20, 20a) for rotating this component, that the second component (30, 40) of the second unit (19) is provided with teeth (29) for the driving bevel gear (30) and axially displaceable relative to the first component but connected with the first component such as to prevent relative rotation to the latter, that an adjusting screw (43) extends coaxially through the first and the second unit and abuts with its head (44) against the first unit (16), that the screw (43) is lockable relative to the second component (30, 40) of the second unit with the help of a locking means (47) and is connected with this component (30, 40) by screw threads (50, 51) such that after releasing the locking means the axial position of the second component (30, 40) can be varied rotating the screw for adjusting the play between the teeth (28, 29) of the bevel gears (27, 30). |
