Patent ID: 8291789

Claim:
A robot arm assembly comprising: a support member; a first rotating member rotatably connected to the support member; a second rotating member rotatably connected to the first rotating member; and a driving mechanism to drive the first rotating member, wherein the driving mechanism comprises a gear transmission mechanism directly coupled to the first rotating member, a driver mounted on the support member and provided with an output shaft coupled to the gear transmission mechanism, and a support mechanism supporting the gear transmission mechanism wherein the support mechanism comprises a first support member and a second support member fixed to the first support member and cooperatively define a receiving portion to partially receive the gear transmission mechanism, the first support member comprises a bottom plate connected to the second support member and a plurality of support portions extending from an edge of the bottom plate, and the second support member is positioned on the support portions, the second support member is parallel to the bottom plate; the gear transmission mechanism comprises a first gear shaft rotatably positioned between the first support member and the second support member, and a second gear shaft parallel to the first gear shaft and rotatably positioned between the first support member and the second support member.