Reinforced motor having reduced operational vibration amplitude

• US 5,949,163 A
• Filed: 10/26/1998
• Issued: 09/07/1999
• Est. Priority Date: 10/26/1998
• Status: Expired due to Term

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Karafillis, Apostolos Pavlos, Hedeen, Robert Arvin
• Primary Examiner(s): Ramirez, Nestor
• Assistant Examiner(s): Waks, Joseph
• Application Number:
  US09/178,757
• Time in Patent Office: 316 Days
• Field of Search: 310/51, 310/89, 310/42, 220/4.06, 220/4.07, 174/66
• US Class Current: 310/51
• CPC Class Codes: H02K 5/24 specially adapted for suppression or reduction of noise or vibrations

Abstract

A reinforced motor for reducing amplitude of operational vibrations includes a stator having an open end, a rotor disposed through and centrally of the stator and having at least one end, an end shield mounted to the open end of the stator and having an outer surface and rotatably supporting the rotor at the one end thereof, and an elongated stiffening member attached to or formed on the outer surface of the end shield so as to increase stiffness and reduce bending of the end shield and thereby reduce amplitude of operational vibrations produced by rotation of the rotor relative to the stator. A peripheral portion of the end shield forms an opening for receiving a switch housing. The stiffening member is attached on the outer surface of the end shield adjacent to the switch housing opening.

Claims

1. A reinforced motor for reducing amplitude of operational vibrations, comprising:

a stator having an open end;

a rotor disposed through said stator and having at least one end;

an end shield mounted to said open end of said stator and having an outer surface, said end shield rotatable supporting said rotor at said one end thereof; and

an elongated stiffening member attached to or formed on said outer surface of said end shield so as to increase stiffness and reduce bending of said end shield and thereby reduce an amplitude of operational vibrations produced by rotation of said rotor relative to said stator;

wherein said stiffening member is attached to said end shield, and wherein said stiffening member is comprised of a material having greater rigidity and stiffness than a material comprising said end shield so as to provide a reinforcement of said end shield.

2. A reinforced motor for reducing amplitude of operational vibrations, comprising:

a annular stator having an open end;

a rotor disposed centrally through said annular stator and having at least one end;

an end shield mounted to said open end of said stator and having an outer surface, a central opening receiving said one end of said rotor and a plurality of raised surface portions formed on and protruding outwardly from said outer surface and spaced apart from one another, said end shield rotatably supporting said one end of said rotor within said central opening; and

an elongated stiffening member attached to or formed on said outer surface of said end shield and extending between a pair of adjacent ones of said raised surface portions of said end shield so as to increase stiffness and reduce bending of said end shield and thereby reduce an amplitude of operational vibrations produced by rotation of said rotor relative to said stator;

wherein said stiffening member is attached to said end shield, and wherein said stiffening member is comprised of a material having greater rigidity and stiffness than a material comprising said end shield so as to provide a reinforcement of said end shield.