Patent ID: 7112215

Claim:
A numerically-controlled (NC) 3D vertebra rectifier comprising a bed body, a head and breast plate, and a hip and leg plate; wherein, said bed body is of a frame structure and is divided into an upper bed body and a lower bed body; said bed body is installed with an automatic rising and lowering mechanism; said head and breast plate and said hip and leg plate are arranged along a longitudinal axis; said head and breast plate is installed on said upper bed body; a traction mechanism of said head and breast plate and an angled mechanism of said hip and leg plate is installed in said upper bed body; said hip and leg plate is supported by a rotary supporting arm which is positioned along the longitudinal axis; the lower part of said hip and leg plate is set up with a rotation mechanism about the longitudinal axis; and a connecting bar on said angled mechanism is connected to said rotary supporting arm of said hip and leg plate via a transverse axle, which makes said head and breast plate and said hip and leg plate as an integrity, wherein, said automatic rising and lowering mechanism installed in said bed body comprises four guide sleeves, four guide poles, a threaded sleeve, a trapezoidal rising and lowering lead screw, a motor, and a worm gear box suite; said four guide sleeves fixed at the four corners of an upper base plate under said upper bed body is connected to said four guide poles fixed at the four corners of a lower base plate under said lower bed body; said thread sleeve fixed in the middle of said upper base plate of said upper bed body is connected to said trapezoidal rising and lowering lead screw fixed on said lower base plate of said lower bed body; said motor, said worm gear box suite, and said trapezoidal rising and lowering lead screw are installed on said lower base plate of said lower bed body and said motor drives said trapezoidal rising and lowering lead screw via said worm gear box suite.