| 摘要 |
A robot arm assembly includes a first arm, a second arm; a first transmission assembly and a second transmission assembly. The first transmission assembly includes a first rotation shaft having a first bevel gear portion, a second rotation shaft having a second bevel gear portion engaging with the first bevel gear portion, and a third rotation shaft non-rotatably connected to the second rotation shaft. The second transmission assembly includes a forth rotation shaft and a fifth rotation shaft. The forth rotation shaft is rotatably sleeved on the first rotation shaft and includes a forth bevel gear potion. The fifth rotation shaft is rotatably sleeved on the second rotation shaft and includes a fifth bevel gear portion engaging with the forth bevel gear portion. An end of the fifth rotation shaft opposite to the fifth bevel gear portion is connected to the second arm.
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