Vibration reduction shaft

1. A vibration reduction shaft comprising:

a cylindrical outer shaft having an inner hollow portion,

wherein the outer shaft includes:

a first member and a second member which are disposed to be spaced apart from each other in a longitudinal direction of the shaft; and

a vibration reduction region which is disposed between the first member and the second member, and

multiple connecting members, which connect the first member and the second member in an axial direction, are disposed to be spaced apart from one another within the vibration reduction region,

wherein a first stopper, which has one end attached to the first member and the other end formed with a protrusion, and a second stopper, which has one end attached to the second member and the other end formed with a groove that accommodates the protrusion, are disposed between each of the multiple connecting members and within the vibration reduction region.

2. The vibration reduction shaft according to claim 1 , wherein one end of the connecting member is integrally coupled to any one of the first and second members, and the other end of the connecting member is coupled to the other of the first and second members through a damping material.

3. The vibration reduction shaft according to claim 1 , wherein the other end of the first stopper and the other end of the second stopper are spaced apart from each other at a predetermined interval d.

4. The vibration reduction shaft according to claim 1 , wherein a bevel gear is mounted on the outer shaft.