Patent ID: 9156161
Filing Date: 2015-10-13
Classification: B25J,Y10S,Y10T

Abstract:
1. A robot arm assembly, comprising: a first robot arm comprising a first body and a backlash adjusting assembly mounted on an inner sidewall of the first body, the first body defining a first receiving chamber, the backlash adjusting assembly comprising a base plate, a protruding shaft protruding from the base plate, and an adjusting member, the base plate defining an adjusting hole, the adjusting member detachably inserted into the adjusting hole, and detachably coupled to the first body; a second robot arm rotatably coupled to the first robot arm, the second robot arm comprising a second body and a first transmission assembly rotatably coupled to the second body, the second body defining a second receiving chamber, the first transmission assembly comprising a first adjusting gear, a first intermediate gear, and a second adjusting gear received in the first receiving chamber and meshing in that order, the second adjusting gear coupled to the second body; and a third robot arm rotatably coupled to the second robot arm, and comprising a third body and a second transmission assembly coupled to the third body, the second transmission assembly comprising a third adjusting gear, a second intermediate gear, and a fourth adjusting gear received in the second receiving chamber and meshing in that order, the fourth adjusting gear coupled to the third body, wherein the first intermediate gear and the second intermediate gear are sleeved on the protruding shaft, and the second intermediate gear is stacked on the first intermediate gear, a position of the base plate relative to the first body is capable of being adjusted by adjusting a position of the adjusting member relative to the adjusting hole, thereby a backlash between the first intermediate gear and the first adjusting gear, a backlash between the first intermediate gear and the second adjusting gear, a backlash between the second intermediate gear and the third adjusting gear, and a backlash between the second intermediate gear and the fourth adjusting gear being adjusted.