Motor and valve drive device

Patent metadata

Field	Value
Publication number	US-11156306-B2
Application number	US-201916425134-A
Country	US
Kind code	B2
Filing date	May 29, 2019
Priority date	May 31, 2018
Publication date	Oct 26, 2021
Grant date	Oct 26, 2021

Abstract

To suppress variation, among rotors, in a relative position between the position of magnetic poles of a magnet and the rotation position (for example, the position of teeth of a pinion) of an integral rotation unit configured to rotate integrally with the rotor main body. A motor includes: a rotor including a magnet fixed to an outer periphery of a rotor main body, and an integral rotation unit assembled to the rotor main body; and a spindle configured to rotatably support the rotor. The magnet includes a positioning marker used when the rotor main body is fixed to the magnet, and the integral rotation unit and the rotor main body are configured to be capable of being assembled in a set relative arrangement.

First claim

What is claimed is:

1. A motor, comprising:
a rotor comprising a magnet fixed to an outer periphery of a rotor main body and an integral rotation unit assembled to the rotor main body; and
a spindle configured to rotatably support the rotor,
wherein the magnet comprises a positioning marker that is used when the rotor main body is fixed to the magnet,
wherein the integral rotation unit and the rotor main body are configured to be assembled in a set relative arrangement,
wherein the integral rotation unit and the rotor main body are fixed by fitting at least one concave unit and at least one convex unit to each other,
wherein the at least one concave unit and the at least one convex unit are each formed in plurality,
wherein one of the plurality of concave units is different in shape from the other concave units,
wherein one of the plurality of convex units is different in shape from the other convex units, and
wherein the integral rotation unit and the rotor main body are capable of being assembled in a relative arrangement in which the one concave unit and the one convex unit are fitted to each other.

2. The motor according to claim 1 , wherein the rotor main body is fixed to the magnet by insert molding.

3. The motor according to claim 1 , wherein the positioning marker is a notch formed in the magnet.

4. The motor according to claim 1 , wherein the positioning marker is provided at a position where magnetic poles are switched in a circumferential direction of the magnet.

5. The motor according to claim 1 , wherein the at least one concave unit is formed in the rotor main body, and the at least one convex unit is formed in the integral rotation unit.

6. The motor according to claim 1 , wherein the integral rotation unit is a power output member provided with a pinion, and is provided with at least one abutment convex unit in a site not interfering with a surface where teeth of the pinion are present.

7. A valve drive device comprising:
a base including a fluid inlet, a fluid outlet, and a valve seat surface, at least one of the fluid inlet and the fluid outlet being opened at the valve seat surface;
a cover configured to define, between the valve seat surface and the cover, a valve chamber with which the fluid inlet and the fluid outlet communicate;
a valve element rotatably arranged in the valve chamber, having a contact surface sliding on the valve seat surface, and configured to rotate to switch a flow path of a fluid; and
a valve element drive mechanism configured to rotate the valve element about an axis orthogonal to the valve seat surface,
wherein the valve element drive mechanism rotates the valve element by using, as a power source, the motor according to claim 1 .

8. The valve drive device according to claim 7 ,
wherein one end of the spindle of the motor is fixed non-rotatably to the base,
wherein a power output member including a pinion arranged between the base and the rotor main body at the one end side of the spindle is provided, and
wherein the valve element is configured to rotate via a reduction gear meshing with the pinion.

9. A motor, comprising:
a rotor comprising a magnet fixed to an outer periphery of a rotor main body and an integral rotation unit assembled to the rotor main body; and
a spindle configured to rotatably support the rotor,
wherein the magnet comprises a positioning marker that is used when the rotor main body is fixed to the magnet,
wherein the integral rotation unit and the rotor main body are configured to be assembled in a set relative arrangement,
wherein the integral rotation unit and the rotor main body are fixed by fitting at least one concave unit and at least one convex unit to each other,
wherein the at least one concave unit and the at least one convex unit are each formed in plurality,
wherein a circumferential spacing for a set including a concave unit among the plurality of concave units is different in length from another circumferential spacing for a different set including a different concave unit,
wherein a circumferential spacing for a set including a convex unit among the plurality of convex units is different in length from another circumferential spacings for a different set including a different convex unit, and
wherein the integral rotation unit and the rotor main body are capable of being assembled in a relative arrangement in which the sets including the concave units and the convex units, which are positioned with the different spacings in length therebetween, are fitted to each other.

10. A valve drive device comprising:
a base including a fluid inlet, a fluid outlet, and a valve seat surface, at least one of the fluid inlet and the fluid outlet being opened at the valve seat surface;
a cover configured to define, between the valve seat surface and the cover, a valve chamber with which the fluid inlet and the fluid outlet communicate;
a valve element rotatably arranged in the valve chamber, having a contact surface sliding on the valve seat surface, and configured to rotate to switch a flow path of a fluid; and
a valve element drive mechanism configured to rotate the valve element about an axis orthogonal to the valve seat surface,
wherein the valve element drive mechanism rotates the valve element by using, as a power source, the motor according to claim 9 .

11. The valve drive device according to claim 10 ,
wherein one end of the spindle of the motor is fixed non-rotatably to the base,
wherein a power output member including a pinion arranged between the base and the rotor main body at the one end side of the spindle is provided, and
wherein the valve element is configured to rotate via a reduction gear meshing with the pinion.

Assignees

• Nidec Sankyo Corp

Inventors

• Yokoe Satoru

Classifications

• H02K7/116

  with gears · CPC title

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• F16K31/043 Primary

  characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means · CPC title

• H02K1/2733 Primary

  Annular magnets · CPC title

• H02K2213/03

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