Transducer for converting between electrical energy and mechanical energy

Patent metadata

Field	Value
Publication number	US-11239719-B2
Application number	US-202016800340-A
Country	US
Kind code	B2
Filing date	Feb 25, 2020
Priority date	Feb 28, 2019
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

Abstract

A motor that includes a plurality of stator members and a busbar member. A coil may be wound around each of the plurality of stator members, and the plurality of stator members may be arranged in an annular shape when viewed in an axial direction of the motor. The busbar member may connect to the coil ends of the plurality of stator members. The busbar member may comprise an annular shaped base portion, and a connection terminal connected to the base portion and connected to the coil end portions. The connection terminal may be provided with two recesses. The coil end portion of a first stator member and the coil end portion of a second stator member may be inserted through the two recesses respectively, where the first stator member and the second stator member are adjacent to each other.

First claim

What is claimed is:

1. A transducer for converting between electrical energy and mechanical energy, comprising:
a first coil and a second coil each comprising a first coil end and a second coil end;
a first stator member and a second stator member each configured in an annular shape and wound with the first coil and the second coil, respectively; and
a busbar comprising a base portion configured in an annular shape, and a connection terminal connected to the base portion via a base connection and configured to be connected to the first coil end of the first stator member and the second coil end of the second stator member, wherein
the first coil end of the first stator member and the second coil end of the second stator member are arranged adjacent to each other in a direction along the annular shape of the base portion of the busbar, and

the connection terminal comprises a first recess and a second recess configured to receive the first coil end of the first stator member and the second coil end of the second stator member, respectively.

2. The transducer of claim 1 , wherein the first recess and the second recess are aligned along a width direction of the connection terminal.

3. The transducer of claim 1 , wherein the first recess and the second recess are recessed from an end of the connection terminal and towards the base portion.

4. The transducer of claim 3 , wherein a leading end portion of the first recess and a leading end portion of the second recess are each formed in a shape in which a center in a width direction of the first recess and the second recess are deeper than both ends in the width direction of the first recess and the second recess.

5. The transducer of claim 4 , wherein
the first coil end and the second coil end are formed in a linear columnar shape,
a depth of the first recess is larger in size than a diameter of the first coil end of the first stator member, and
a depth of the second recess is larger in size than a diameter of the second coil end of the second stator member.

6. The transducer of claim 5 , wherein
the first coil end of the first stator member is bent along a wall of the first recess and along an outer surface of the first stator member, and
the second coil end of the second stator member is bent along a wall of the second recess and along an outer surface of the second stator member.

7. The transducer of claim 6 , wherein
the connection terminal further comprises a first tongue portion between a first side end of the connection terminal and the first recess, and a second tongue portion between a second side end of the connection terminal and the second recess,
the first coil end of the first stator member is configured to be partially covered by the first tongue portion, and
the second coil end of the second stator member is configured to be partially covered by the second tongue portion.

8. The transducer of claim 7 , wherein the connection terminal further comprises a bent portion bent in a direction towards the first stator member and the second stator member halfway in a lengthwise direction extending from the end of the connection terminal towards to the base portion.

9. The transducer of claim 4 , wherein
the connection terminal further comprises a first tongue portion between a first side end of the connection terminal and the first recess, and a second tongue portion between a second side end of the connection terminal and the second recess,
the first coil end of the first stator member is configured to be partially covered by the first tongue portion, and
the second coil end of the second stator member is configured to be partially covered by the second tongue portion.

10. The transducer of claim 9 , wherein the connection terminal further comprises a bent portion bent in a direction towards the first stator member and the second stator member halfway in a lengthwise direction extending from the end of the connection terminal towards to the base portion.

11. The transducer of claim 1 , wherein
the first coil end and the second coil end are formed in a linear columnar shape,
a depth of the first recess is larger in size than a diameter of the first coil end of the first stator member, and
a depth of the second recess is larger in size than a diameter of the second coil end of the second stator member.

12. The transducer of claim 1 , wherein
the first coil end of the first stator member is bent along a wall of the first recess and along an outer surface of the first stator member, and
the second coil end of the second stator member is bent along a wall of the second recess and along an outer surface of the second stator member.

13. The transducer of claim 1 , wherein
the connection terminal further comprises a first tongue portion between a first side end of the connection terminal and the first recess, and a second tongue portion between a second side end of the connection terminal and the second recess,
the first coil end of the first stator member is configured to be partially covered by the first tongue portion, and
the second coil end of the second stator member is configured to be partially covered by the second tongue portion.

14. The transducer of claim 2 , wherein the first recess and the second recess are rounded in shape.

15. The transducer of claim 2 , wherein the first recess and the second recess are rectangular in shape.

Assignees

• Murata Manufacturing Co

Inventors

• Natsumeda Mitsutoshi
• Amano Hisato
• Sakurada Takashi
• Sakaguchi Eiji

Classifications

• H02K3/12

  arranged in slots · CPC title

• H02K1/165

  Shape, form or location of the slots · CPC title

• H02K3/48

  in slots · CPC title

• H02K3/28 Primary

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title

• H02K3/50

  Fastening of winding heads, equalising connectors, or connections thereto · CPC title