Sun gear shell assembly
AssigneeSPX Corporation
InventorsChao Lu, Chester F. Rutkowski
Life of this patent
Estimating the term…
Abstract
A sun gear shell assembly includes a cylindrical shell body formed by cold-rolling a low carbon steel, and a neck section having a protruding neck collar, formed by heat drawing and machining a middle carbon steel. A wall thickness of the shell body is increased for added strength. The neck has a 30 degree chamfer to prevent failures at the neck section, and the neck section is then welded to the shell body so that the sun gear shell becomes one piece. A plurality of holes are disposed in the neck section encircling the neck collar. An injection molded plastic washer including a plurality of tabs disposed on one side surface, has the tabs inserted into holes formed in the neck section to form the completed sun gear shell assembly.
Claims35
A sun gear shell, comprising:
- a cylindrical shell body having an open end and a substantially closed end having an end surface;
- a neck centrally disposed in, and protruding from, said end surface of said shell body;
- a plurality of holes disposed in said end surface of said shell body at positions encircling said neck.
A sun gear shell assembly, comprising:
- a cylindrical shell body having an open end and a substantially closed end having an end surface;
- a neck centrally disposed in, and protruding from, said end surface of said shell body, said end surface including a plurality of holes encircling said neck;
- and
- a washer having a plurality of tabs on one side surface, said tabs which fit into said holes.
A sun gear shell, comprising:
- a cylindrical shell body having an open end and a substantially closed end having an end surface;
- a neck centrally disposed in, and protruding from, said end surface of said shell body;
- wherein said neck is welded to said shell body.
A sun gear shell, comprising:
- a cylindrical shell body having an open end and a substantially closed end having an end surface;
- a neck centrally disposed in, and protruding from, said end surface of said shell body;
- and
- wherein said neck has a chamfer at an edge portion at a base of said neck located at said end surface of said shell body.
A sun gear shell assembly, comprising:
- a cylindrical shell having an open end and a substantially closed end having an end surface;
- a neck centrally disposed in, and protruding from, said end surface of said shell body;
- a washer disposed on said end surface of said shell body and encircling said neck;
- means for attaching said washer to said end surface of said shell body.
A method of manufacturing a sun gear shell, comprising:
- cold-rolling a first material to form a wall of a cylindrical shell body;
- forming a neck section using a second material;
- and
- welding said neck section onto said shell wall.
A method of manufacturing a sun gear shell assembly, comprising:
- cold-rolling a first material to form a wall of a cylindrical shell body;
- forming a neck section having a protruding neck, using a second material, said neck section having a plurality of holes disposed encircling said neck;
- welding said neck section onto said shell wall;
- injection molding a washer having a plurality of tabs on one side surface;
- and
- inserting said tabs of said washer into said holes formed in said neck section.
Dependencies are inferred from the claim text.