Two-piece electric motor shaft
AssigneePanther Machine, Inc.
InventorDonald G. Leith
Life of this patent
Estimating the term…
Abstract
A two-part electric motor shaft assembly. The assembly includes an elongated shank member which has a cavity hollowed out at one end. A cam pin has one end configured to be received in the shank cavity and secured thereto. The other end of the cam pin forms a cam surface which is eccentric with respect to a longitudinal axis defined by the elongated shank member. By utilizing a two-piece design, the shank member may be formed of a softer and less expensive material than the alloy steel used to form the cam pin since the shank member is subjected to less loading and wear. The two-part motor shaft assembly of the present invention eliminates the stress riser that occurs with application of loading to the transition joint of a single piece design.
Claims8
A two-piece electric motor shaft assembly comprising:
- an elongated shank member having a length and an outer diameter and defining a first longitudinal axis, said elongated shank member having a cavity extending along part of the length of the shank member and opening out onto an end thereof, said cavity having a second longitudinal axis parallel to and radially offset from said first longitudinal axis;
- a cam pin having a first end and a second end thereof, said first end of said cam pin being configured to be received into said elongated shank member cavity, said second end of said cam pin forming a camming surface being disposed along said second longitudinal axis, and
- means for securing said cam pin to said shank member.
A method of manufacturing an electric motor shaft assembly comprising:
- forming an elongated shank member having a length and defining a first longitudinal axis;
- forming a cavity at an end of said elongated shank member, said cavity extending for a portion of the length of said shank member and opening out onto said end, said cavity defining a second longitudinal axis parallel to and radially offset with respect to said first longitudinal axis;
- forming a cam pin having a first end configured to be received into said elongated shank member cavity and a second end;
- forming a camming surface on said second end of said cam pin;
- securing said first end of said cam pin into said shank member cavity.
Dependencies are inferred from the claim text.