Motor having non-circular stator

Patent metadata

Field	Value
Publication number	US-11043857-B2
Application number	US-201816195174-A
Country	US
Kind code	B2
Filing date	Nov 19, 2018
Priority date	Feb 2, 2015
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

An apparatus includes a motor having a rotor; and a stator, where the rotor is located at least partially in a rotor receiving area of the stator, where the stator includes at least one coil winding and teeth, where the at least one coil winding is located on at least some of the teeth, where the teeth include a first set of the teeth and a second set of the teeth, where the teeth of the first set of teeth are longer in a radial direction from the rotor receiving area than the teeth of the second set of teeth.

First claim

What is claimed is:

1. An apparatus comprising:
a motor comprising:
a rotor; and
a stator, where the rotor is located at least partially in a rotor receiving area of the stator, where the stator comprises:
a stator member having teeth and at least one component receiving area spaced from the rotor receiving area, where the teeth comprise a first set of the teeth and a second set of the teeth, where the teeth of the first set of teeth are longer in a radial direction from the rotor receiving area than the teeth of the second set of teeth, and where the second set of teeth are located closer to the least one component receiving area than the first set of teeth, and
at least one coil winding on the stator member, and
a motor housing having the stator therein; and

at least one component movably located in the at least one component receiving area, where the at least one component comprises a rod having a screw thread located in the at least one component receiving area,
where the motor housing is connected to the screw thread of the rod such that rotation of the rod causes the motor housing to longitudinally move along the rod.

2. An apparatus as in claim 1 where the rod is configured to rotate in the at least one component receiving area, and the at least one component receiving area is configured for the stator to longitudinally move up and down along the rod.

3. A robot drive comprising:
the apparatus as claimed in claim 1 ; and
a drive shaft connected to the rotor, where the drive shaft extends out of the motor housing, and where the motor housing comprises at least one second component receiving area, where the at least one second component receiving area of the motor housing has at least one of the at least one component movably located therein.

4. A robot comprising:
the robot drive as in claim 3 ; and
a robot arm connected to the drive shaft.

5. A robot drive as in claim 3 further comprising a drive housing configured to be connected to chamber, a connection of the motor housing to the drive housing configured to allow the motor housing to slide on the drive housing, and where the rod having the screw thread comprises a leadscrew connected to the motor housing to move the motor housing as the leadscrew is rotated.

6. A robot drive as in claim 5 further comprising a screw motor connected to the drive housing and the leadscrew, where the screw motor is configured to axially rotate the leadscrew.

7. An apparatus as in claim 1 where a base of each of the teeth is located at a portion of the stator member which forms an outer perimeter wall of the stator member, and where the outer perimeter wall has a substantial oval shape.

8. An apparatus as in claim 7 where the at least one component receiving area has an open side at a lateral side perimeter wall of the stator member.

9. An apparatus as in claim 1 where the at least one component receiving area has a center axis which is parallel to a center axis of the rotor receiving area.

10. An apparatus as in claim 1 where the at least one component receiving area is substantially closed except at top and bottom sides of the stator member.

11. A method comprising:
providing a stator member having teeth, where the stator member comprises a rotor receiving area, where the teeth comprise a first set of the teeth and a second set of the teeth, where the teeth of the first set of teeth are longer in a radial direction from the rotor receiving area than the teeth of the second set of teeth, where the stator member comprises at least one component receiving area spaced from the rotor receiving area, and where the second set of teeth are located closer to the least one component receiving area than the first set of teeth;
locating at least one coil winding on at least some of the teeth;
locating at least one component in the at least one component receiving area, where the at least one component is configured to be axially rotated in the at least one component receiving area,
where the at least one component comprises a rod having a screw thread located in the at least one component receiving area, where the rod is configured to rotate in the at least one component receiving area, and the at least one component receiving area is configured for the stator to longitudinally move up and down along the rod.

12. A method as in claim 11 further comprising providing a motor housing having the stator member therein, where the motor housing is connected to the screw thread of the rod such that rotation of the rod causes the motor housing to longitudinally move along the rod.

13. A method as in claim 11 where the providing of the stator member comprises providing the at least one component receiving area with an open side at a lateral side perimeter wall of the stator member.

14. A method comprising:
providing a motor comprising a motor housing, a stator member having teeth, and at least one coil winding on at least some of the teeth, where the stator member comprises a rotor receiving area, where the teeth comprise a first set of the teeth and a second set of the teeth, where the teeth of the first set of teeth are longer in a radial direction from the rotor receiving area than the teeth of the second set of teeth, where the stator member comprises at least one component receiving area spaced from the rotor receiving area, and where the second set of teeth are located closer to the least one component receiving area than the first set of teeth;
locating at least one component in the at least one component receiving area, where the at least one component is configured to be axially rotated in the at least one component receiving area; and
connecting a drive housing to the motor housing to allow the motor housing to slide on the drive housing, where the at least one component comprises a leadscrew connected to the motor housing to move the motor housing as the leadscrew is rotated.

15. A method as in claim 14 further comprising connecting a screw motor to the drive housing and the leadscrew, where the screw motor is configured to axially rotate the leadscrew.

16. An apparatus comprising:
a motor comprising:
a motor housing comprising a first component receiving area;
a rotor; and
a stator located in the motor housing, where the rotor is located at least partially in a rotor receiving area of the stator, where the stator comprises:
a stator member having teeth and a second component receiving area spaced from the rotor receiving area, where the teeth comprise a first set of the teeth and a second set of the teeth, where the teeth of the first set of teeth are longer in a radial direction from the rotor receiving area than the teeth of the second set of teeth, and where the second set of teeth are located closer to the second component receiving area than the first set of teeth, and
at least one coil winding on the stator member; and

a first leadscrew movably located in both the first component receiving area and the second component receiving area, where a connection is provided between the motor housing and the first leadscrew to longitudinally move the motor along the first leadscrew as the leadscrew is axially rotated.

17. An apparatus as in claim 16 further comprising a drive housing configured to be connected to chamber, and a connection of the motor housing to the drive housing being configured to allow the motor housing to slide on the drive housing.

18. An apparatus as in claim 17 further comprising a leadscrew motor connected between the drive housing and the leadscrew, where the lea

Assignees

• Persimmon Technologies Corp
• Persimmon Tech Corporation

Inventors

• Krishnasamy Jayaraman
• Hosek Martin
• Poole Dennis

Classifications

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title

• H02K2201/06

  Magnetic cores, or permanent magnets characterised by their skew · CPC title

• H02K7/06

  Means for converting reciprocating motion into rotary motion or vice versa · CPC title

• H02K1/165 Primary

  Shape, form or location of the slots · CPC title

• B25J9/126

  Rotary actuators · CPC title