Patent ID: 7273133

Claim:
An elevator hoisting machine, comprising: a first rotary part with a first hollow defined therein, the first rotary part comprising: a sheave, a brake-side end plate extending radially inward from an inner peripheral surface of the sheave at a first end and having at a diametrically center portion a first shaft portion that extends axially outward, wherein the first shaft portion only extends axially outward from the first hollow, and a brake rotating body located at the first end of the sheave, wherein the sheave, brake-side end plate, and brake rotating body are integrally formed together; a second rotary part with a second hollow defined therein, the second rotary part comprising: a rotor having an outer peripheral surface on which a magnet is arranged, and a motor-side end plate extending radially inward from an inner peripheral surface of the rotor at a second end and having at a diametrically center portion a second shaft portion that extends axially outward, wherein the second shaft portion only extends axially outward from the second hollow, wherein the rotor and motor-side end plate are integrally formed together, wherein the second rotary part is coaxially and detachably coupled to the first rotary part, wherein the first and second hollows are merged to constitute an enclosed space between the brake-side end plate and the motor-side end plate with the sheave abutting on the rotor; wherein said first and second shaft portions are coaxial and are configured so that there is a hollow space between said first and second shaft portions; a sheave casing which covers the first rotary part and rotatably supports the first shaft portion of the brake-side end plate, the sheave casing comprising a brake braking body which makes contact with the brake rotating body to provide braking; and a frame which covers the second rotary part and rotatably supports the second shaft portion of the motor-side end plate, the frame comprising a stator arranged to face the magnet, wherein the sheave casing and frame are coupled together to form an external enclosure.