Electric motor

• US 8,575,800 B1
• Filed: 07/20/2012
• Issued: 11/05/2013
• Est. Priority Date: 01/09/2009
• Status: Active Grant

• Current Assignee: Hydro-Gear Limited Partnership
• Original Assignee: Hydro-Gear Limited Partnership
• Inventors: Fox, Ivan E., Wyatt, Christopher K., Hendershot, Jim
• Primary Examiner(s): MULLINS, BURTON S
• Application Number:
  US13/554,815
• Time in Patent Office: 473 Days
• Field of Search: 279/8.141, 279/143, 836/66, 310/157
• US Class Current: 310/75.R
• CPC Class Codes: A01D 2101/00 Lawn-mowers
• CPC Class Codes: A01D 34/03 mounted on a vehicle, e.g. a tractor, or drawn by an animal or a vehicle
• CPC Class Codes: A01D 69/02 electric
• CPC Class Codes: B60L 1/003 to auxiliary motors, e.g. for pumps, compressors
• CPC Class Codes: B60L 2200/40 Working vehicles
• CPC Class Codes: B60L 2220/14 Synchronous machines
• CPC Class Codes: B60L 2220/50 Structural details of electrical machines
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2250/26 by pedal actuation
• CPC Class Codes: B60L 2270/145 Structure borne vibrations
• CPC Class Codes: B60L 3/0061 relating to electrical machines
• CPC Class Codes: H02K 1/06 characterised by the shape, form or construction
• CPC Class Codes: H02K 1/28 Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
• CPC Class Codes: H02K 11/25 Devices for sensing temperature, or actuated thereby
• CPC Class Codes: H02K 2201/03 Machines characterised by aspects of the air-gap between rotor and stator
• CPC Class Codes: H02K 2201/06 Magnetic cores, or permanent magnets characterised by their skew
• CPC Class Codes: H02K 5/04 Casings or enclosures characterised by the shape, form or construction thereof
• CPC Class Codes: H02K 5/06 Cast metal casings
• CPC Class Codes: H02K 5/1732 : radially supporting the rotary shaft at both ends of the rotor H02K5/1737 takes precedence
• CPC Class Codes: H02K 5/225 : Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132
• CPC Class Codes: H02K 7/003 : Couplings; Details of shafts means for mounting rotors on shafts H02K1/28
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• CPC Class Codes: Y10T 279/16 : Longitudinal screw clamp
• CPC Class Codes: Y10T 279/33 : Member applies axial force component

Abstract

An electric motor includes an upper housing, a lower housing including a flange for mounting the upper housing thereon and a cone-shaped portion extending away from the flange and the upper housing. The electric motor further includes a stator assembly formed of a first core having a first height and fitted into the upper housing, a rotor assembly rigidly joined to a shaft to rotate therewith within the stator assembly and formed of a second core having a second height, and a hub connected to a lower end of the shaft to rotate therewith in relation to the cone-shaped portion. The hub is configured to secure an operable implement to the electric motor. The second height is greater than the first height.

Claims

1. An electric motor, comprising:

an upper housing;

a lower housing having a flange to sealingly receive the upper housing and an extended portion;

a motor shaft having an end configured to engage an implement adapter, the end configured as a double-D coupling interface, the motor shaft disposed at least partially within the upper and lower housings and supported by the extended portion of the lower housing;

the implement adapter having an end configured to receive an implement, wherein the end of the implement adapter is configured as a second double-D coupling interface;

a stator assembly disposed within the upper housing; and

a rotor assembly engaged to the motor shaft to rotate therewith within the stator assembly.

2. The electric motor of claim 1, wherein:

the double-D coupling interface comprises a pair of substantially flat surfaces for engaging with the implement adapter; and

the pair of substantially flat surfaces forming opposite sides of the end of the motor shaft.

3. The electric motor of claim 2, wherein the implement adapter comprises a pair of substantially flat receiving surfaces for engaging with the pair of substantially flat surfaces of the double-D coupling interface.

4. The electric motor of claim 1, wherein the implement comprises a mower blade.

5. The electric motor of claim 1, wherein the second double-D coupling interface comprises a second pair of substantially flat surfaces for engaging with the implement.

6. The electric motor of claim 5, wherein the implement comprises a second pair of substantially flat receiving surfaces for engaging with the second pair of substantially flat surfaces of the second double-D coupling interface.

7. The electric motor of claim 1, wherein:

the stator assembly is formed of a first core having a first height; and

the rotor assembly is formed of a second core having a second height;

wherein the second height is greater than the first height.

8. The electric motor of claim 1, wherein the flange has a plurality of fastener openings about a circumference of the flange to mount the electric motor to a deck.

9. An electric motor, comprising:

an upper housing;

a lower housing including a flange for mounting the upper housing thereon and a cone-shaped portion extending away from the flange and the upper housing;

a shaft having an end configured as a double-D coupling interface;

a stator assembly formed of a first core and disposed in the upper housing;

a rotor assembly engaged to the shaft to rotate therewith within the stator assembly, the rotor assembly formed of a second core; and

a hub engaged to the double-D coupling interface to rotate therewith in relation to the cone-shaped portion, the hub being configured to secure an operable implement to the electric motor, wherein the hub has an end configured to receive the operable implement, the end of the hub configured as a second double-D coupling interface.

10. The electric motor of claim 9, wherein:

the double-D coupling interface comprises a pair of substantially flat surfaces for engaging with the hub; and

the pair of substantially flat surfaces forming opposite sides of the end of the shaft.

11. The electric motor of claim 10, wherein the hub comprises a pair of substantially flat receiving surfaces for engaging with the pair of substantially flat surfaces of the double-D coupling interface.

12. The electric motor of claim 9, wherein the operable implement comprises a mower blade.

13. The electric motor of claim 9, wherein the second double-D coupling interface comprises a second pair of substantially flat surfaces for engaging with the operable implement.

14. The electric motor of claim 13, wherein the operable implement comprises a second pair of substantially flat receiving surfaces for engaging with the second pair of substantially flat surfaces of the hub.

15. The electric motor of claim 9, wherein:

the first core has a first height; and

the second core has a second height;

wherein the second height is greater than the first height.

16. The electric motor of claim 9, wherein the flange has a plurality of fastener openings about a circumference of the flange to mount the electric motor to a deck.