Patent ID: 8549951

Claim:
A joint mechanism for a robot, the joint mechanism comprising: a base; a first drive device mounted on the base and including a first drive shaft; a second drive device including a second drive shaft perpendicular to the first drive shaft; a joint body defining a plurality of toothed grooves; a sliding board operatively connected to the first drive shaft and the joint body, the sliding board taking the joint body to rotate in unison with the sliding board when the sliding board is driven to rotate by the first drive device; a gear mounted on the second drive shaft, the gear meshing with the toothed grooves thereby causing the joint body to swing with rotation of the gear when the gear is driven to rotate by the second drive device; and a limiting assembly for mounting the joint body on the base with the joint body rotatable and swingable when the sliding board and the gear are driven by the first and second drive devices; wherein when the first drive device is started, the first drive shaft is rotated to rotate the sliding board so that the joint body rotates around the first drive shaft; and when the second drive device is started, the second drive shaft is rotated to rotate the gear meshing with the toothed grooves so that the joint body swings relative to the base.