| 摘要 |
<p>A chain-driven biaxial motion wrist assembly for an industrial robot has a wrist proximal region (12) disposed on one side of the distal end region of a robot arm (11). A hollow shaft (13) is secured at its one end to the wrist proximal region (12) and is supported by one side wall at the distal end region of the robot arm (11) such as to be rotatable around a first axis (β) orthogonal to the longitudinal axis of the robot arm (11). The other end region of the hollow shaft (13) opposes the inner surface of the wall on the other side of the distal end region of the robot arm (11). A wrist distal region (16) is supported by the wrist proximal region (12) such as to be rotatable around a second axis (α) orthogonal to the first axis. A through-shaft (17) is rotatably and coaxially provided within the hollow shaft (13). The wrist distal region (16) is interlockably connected to the through-shaft (17) by a pair of bevel gears (18 and 19). A first sprocket (22) is provided inside the distal end portion of the robot arm (11) such as to be coaxial with the second-mentioned end region of the hollow shaft (13). A second sprocket (23) is provided inside the distal end region of the robot arm (11) such as to be coaxial with the through-shaft (17) and in the vicinity of the first sprocket (22). The first and second sprockets (22 and 23) are respectively connected to first and second chains (26 and 27) for power transmission.</p> |
