Motor-gearbox assembly

• US 9,695,927 B2
• Filed: 07/30/2009
• Issued: 07/04/2017
• Est. Priority Date: 07/30/2009
• Status: Active Grant

• Current Assignee: Ametek Bison Gear & Engineering Incorporated (Ametek Incorporated)
• Original Assignee: Bison Gear & Engineering Corp. (Ametek Incorporated)
• Inventors: Wang, Lee, Thomas, George, Tatar, Sanel, Henke, Edmund, Brauhn, Tyler, Hanson, Matthew S., Parejko, Jim
• Primary Examiner(s): Joyce, William C
• Application Number:
  US12/512,692
• Publication Number:
  US 20110023640A1
• Time in Patent Office: 2,896 Days
• Field of Search: 74421 A, 74606 R, 310 83, 310 89, 310 99
• CPC Class Codes: F16H 2057/005 Mounting preassembled units, i.e. using pre-mounted structures to speed up final mounting process mounting of gears or shafts in a gearbox F16H57/022
• CPC Class Codes: F16H 2057/02013 Extension units for gearboxes, e.g. additional units attached to a main gear
• CPC Class Codes: F16H 2057/02034 Gearboxes combined or connected with electric machines structural association with electric machines H02K7/116
• CPC Class Codes: F16H 2057/02069 for industrial applications
• CPC Class Codes: F16H 2057/0225 with means for adjusting alignment
• CPC Class Codes: F16H 57/032 characterised by the materials used
• CPC Class Codes: H02K 15/16 Centering rotors within the stator; Balancing rotors
• CPC Class Codes: H02K 7/116 with gears
• CPC Class Codes: Y10T 74/19684 Motor and gearing

Abstract

A motor-gearbox assembly includes a housing, a motor, and a gearbox. The housing includes a first alignment mechanism and a second alignment mechanism. The first alignment mechanism is at a first end of the housing and the second alignment mechanism is at a second end of the housing. The motor is mechanically positioned within the housing in accordance with the first alignment mechanism. The gearbox is mechanically positioned within the housing in accordance with the second alignment mechanisms to mechanically couple to the motor.

Claims

1. A motor-gearbox assembly comprises:

a housing having a cylindrical opening formed there through with one end of the cylindrical opening disposed as a first opening at one end of the housing and an opposite end of the cylindrical opening disposed as a second opening at an opposite end of the housing, in which the cylindrical opening has a first diameter, wherein the housing at the first opening is bored to a first depth, having a second diameter that is greater than the first diameter, to provide a first alignment mechanism and wherein the housing at the second opening is bored to a second depth, having a third diameter that is greater than the first diameter, to provide a second alignment mechanism;

a first enclosure structure disposed completely inside the first opening of the housing to enclose the first opening;

a second enclosure structure disposed completely inside the second opening of the housing to enclose the second opening;

a motor mechanically positioned within the housing in accordance with the first alignment mechanism, wherein at least a portion of the motor is in physical contact with the first enclosure structure;

a gearbox mechanically positioned within the housing in accordance with the second alignment mechanism and mechanically coupled to a mechanical coupling extending from the motor; and

a partition disposed within the cylindrical opening separating the motor from the gearbox, except for the mechanical coupling, wherein the first and second enclosure structures secure the motor and gearbox in position and wherein the outer surface of the housing, the outer surface of the first enclosure structure, and the outer surface of the second enclosure structure are void of mounting holes for mounting the enclosure structures to the housing.

2. The motor-gearbox assembly of claim 1, wherein the housing comprises at least one of:

a stainless steel tube;

a carbon steel tube;

a carbon-fiber tube;

an aluminum tube;

a stainless steel ruled surface hollowed geometric shape;

a carbon-fiber ruled surface hollowed geometric shape;

an aluminum ruled surface hollowed geometric shape;

a stainless steel milled structure;

a carbon-fiber casted structure; and

an aluminum formed structure.

3. The motor-gearbox assembly of claim 1, wherein the housing comprises:

a stainless steel tube having a first inner diameter of a first tolerance, wherein an inner circumference of the first end of the housing is bored to a second inner diameter to produce the first alignment mechanism and the inner circumference of the second end of the housing is bored to a third inner diameter to produce the second alignment mechanism, wherein the second and third inner diameters have a second tolerance, and wherein the second tolerance is more strict than the first tolerance.

4. The motor-gearbox assembly of claim 3 further comprises:

the first enclosure structure defining a first end shield having a first o-ring receptacle; and

the second enclosure structure defining a second end shield having a second o-ring receptacle;

wherein the first alignment mechanism includes a corresponding first o-ring receptacle and the second alignment mechanism includes a corresponding second o-ring receptacle;

wherein the first-end-shield is mechanically coupled to the first end of the housing and the second end-shield is mechanically coupled to the second end of the housing, wherein the mechanical couplings of the first and second end-shields to the first and second ends of the housing are moisture sealed using first and second o-rings within the first o-ring receptacle and the corresponding first o-ring receptacle and within the second o-ring receptacle and the corresponding second o-ring receptacle, respectively.

5. The motor-gearbox assembly of claim 1, wherein the motor comprises:

an encapsulated stator having an outer geometry, wherein at least a portion of the outer geometry corresponds to the first alignment mechanism; and

a rotor electro-magnetically coupled to the encapsulated stator.

6. The motor-gearbox assembly of claim 1, wherein the mechanical coupling is a parallel shaft of a rotor extruding into the gearbox.