The invention discloses an
elbow freedom degree achieving device for wearable
rehabilitation training device and a working principle thereof. A motor is connected with a left rotating and right rotating integrated lead screw and fixed to a motor fixing base. The upper arm and the
forearm of the arm are sleeved with an upper arm support and a front arm support respectively, a synchronous belt fixing device is arranged on the lower side of a left rotating nut, a synchronous belt adjusting device is arranged on the upper side of a right rotating nut, and the synchronous belt fixing device and the synchronous belt fixing device are connected through a synchronous belt wound around a synchronous
pulley. The driving motor and the transmission mechanism are arranged on the outer side of an upper arm body in the axis direction of the upper arm, the interference with the outside environment is reduced in the movement process, the left and right rotating integrated rolling ball lead screw and a sliding block mechanism serve as a
transmission system, good self-locking performance is achieved, the
controllability is good, both the left rotating nut and the right rotating nut have a certain
stroke, and it is ensured that the integral mechanism has the limit function. More existing standard components are utilized in the whole mechanism, and compared with the scheme that the same function is achieved by utilizing a speed
reducer, the economic cost is reduced.