Arm assembly for surgical robot

1 . An arm assembly for a surgical robot having a plurality of robot arms, the arm assembly comprising:

a first pulley attached to one side of the robot arm and to which first block and a fourth block are attached;

a second pulley attached to the other side of the robot arm to be spaced apart from the first pulley;

a first strap of which one end is connected to the first block and the other end is connected to the second pulley;

a second strap of which one end is connected to the fourth block and the other end is connected to the second pulley;

a connection member that is supported by the first pulley and is partially inserted in the first block and the fourth block so as to adjust a distance between the first block and the fourth block; and

a pair of connection tabs that are respectively attached to one end of the first strap and one end of the second strap so as to fix the first strap to the first block and to fix the second strap to the fourth block,

wherein a supporting side of each of the pair of connection tabs is supported by stopper protrusions of the first block and the fourth block so as to form an engagement structure with the first block and the fourth block, thereby supporting a distance between the one ends of the first strap and the second strap.

2 . The arm assembly of claim 1 , wherein

one end of the first strap extends along a surface of the first block, and

the other end of the first strap extends along a surface of the second block.