Electric pump

Patent metadata

Field	Value
Publication number	US-12388332-B2
Application number	US-202217706623-A
Country	US
Kind code	B2
Filing date	Mar 29, 2022
Priority date	Mar 30, 2021
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

An electric pump includes: a motor including a shaft; a pump mechanism coupled to an axial one side of the shaft; a circuit substrate located outward in a radial direction orthogonal to the axial direction of the shaft, and a housing capable of accommodating the motor and the circuit substrate. The circuit substrate includes a plate surface facing the shaft and following the axial direction. The housing includes a motor housing part, a substrate housing part, a pump housing part, and an attachment plate part located outward in a radial direction. The attachment plate part includes an attachment surface facing the shaft and following the axial direction. The motor and the pump mechanism are located on an inner angle side of an angle at which a third surface including the plate surface and a fourth surface including the attachment surface intersect.

First claim

What is claimed is:

1. An electric pump comprising:
a motor comprising a shaft that is rotatable about a center axis;
a pump mechanism coupled to one side of the shaft in an axial direction;
a circuit substrate located outward in a radial direction orthogonal to the axial direction of the shaft; and
a housing capable of accommodating the motor and the circuit substrate,
wherein the circuit substrate comprises plate surfaces that are a first surface that faces the shaft, follows the axial direction, and comprises an electronic component and a second surface on a side opposite to the first surface,
the housing comprises a motor housing part accommodating the motor, a substrate housing part accommodating the circuit substrate, a pump housing part accommodating the pump mechanism, and an attachment plate part located outward in the radial direction orthogonal to the axial direction of the shaft,
the attachment plate part comprises an attachment surface that faces the shaft and follows the axial direction, and
the motor and the pump mechanism are located on an inner angle side of an angle at which a third surface comprising the plate surfaces and a fourth surface comprising the attachment surface intersect each other,
wherein the attachment plate part comprises at least two attachment holes,
the at least two attachment holes comprise a first attachment hole and a second attachment hole, and
the first attachment hole is located to be closer to one side in the axial direction than the pump housing part,
wherein the attachment plate part comprises a flow path through which the fluid to be suctioned and ejected by the pump mechanism flows,
wherein the flow path comprises
an outlet flow path extending in the radial direction from the attachment surface and connected to the pump mechanism,
a first inlet flow path extending in the radial direction from the attachment surface to a side of the shaft,
a second inlet flow path connected to the first inlet flow path and passing inside the attachment plate part along the axial direction, and
a third inlet flow path connected to the second inlet flow path, extending in the radial direction, and connected to the pump mechanism, wherein

the third inlet flow path is present between the outlet flow path and the first inlet flow path in the axial direction when seen from a direction orthogonal to the fourth surface.

2. The electric pump according to claim 1 , wherein the substrate housing part comprises a first long side that follows the axial direction and a first short side that intersects the first long side and follows the third surface.

3. The electric pump according to claim 1 , wherein the circuit substrate comprises a second long side that follows the axial direction and a second short side that intersects the second long side and follows the third surface.

4. The electric pump according to claim 1 ,
wherein the attachment plate part has a thickness in the radial direction orthogonal to the axial direction of the shaft, and
the motor, the pump mechanism, and the attachment surface are disposed through the thickness.

5. The electric pump according to claim 1 ,
wherein the substrate housing part comprises a connector part for connection to outside, and
the connector part extends in the axial direction from the substrate housing part.

6. The electric pump according to claim 5 , further comprising:
a plurality of busbars electrically connecting the motor to the circuit substrate,
wherein the plurality of busbars are connected to an end of the circuit substrate on the other side in the axial direction that is a side of the motor, and
the connector part extends from an end of the substrate housing part on the one side in the axial direction that is a side of the pump mechanism.

7. The electric pump according to claim 1 ,
wherein the second attachment hole is located to be closer to the other side in the axial direction than the motor housing part.

8. The electric pump according to claim 1 , wherein at least one of the at least two attachment holes is present between an upper end and a lower end of the housing when seen from a direction orthogonal to the fourth surface.

9. The electric pump according to claim 1 , wherein the attachment plate part comprises an inlet port adapted to suction a fluid using the pump mechanism and an outlet port adapted to eject the fluid using the pump mechanism.

10. The electric pump according to claim 9 ,
wherein the first attachment hole is located on the one side in the axial direction and the second attachment hole is located on the other side in the axial direction, and
the inlet port and the outlet port are located between the first attachment hole and the second attachment hole.

11. The electric pump according to claim 10 ,
wherein the attachment plate part comprises a third attachment hole, and
the inlet port and the outlet port are located between the third attachment hole and the first attachment hole or the second attachment hole when seen from the axial direction.

12. The electric pump according to claim 9 ,
wherein the attachment surface comprises
an inlet port surface part surrounding a periphery of the inlet port, and
an outlet port surface part surrounding a periphery of the outlet port.

13. The electric pump according to claim 9 , wherein the inlet port is disposed with deviation in the axial direction from the outlet port when the attachment surface is seen from a direction orthogonal to the fourth surface.

14. The electric pump according to claim 1 ,
wherein the flow path comprises an inlet flow path and an outlet flow path extending in the radial direction from the attachment surface and connected to a side of the pump mechanism, and
the inlet flow path is present between the outlet flow path and the motor in the axial direction when seen from a direction orthogonal to the fourth surface.

15. The electric pump according to claim 1 ,
wherein the flow path comprises
an inlet flow path connected to a side of the pump mechanism from the inlet port,
an outlet flow path connected from the outlet port to the side of the pump mechanism, and
a relief flow path branching from the outlet flow path for returning the fluid to a side of the inlet flow path.

16. The electric pump according to claim 15 , wherein at least a portion of the inlet flow path overlaps the relief flow path in a direction that intersects the axial direction when seen from a direction along the fourth surface.

17. The electric pump according to claim 1 , wherein the attachment plate part is present between a lower end of the substrate housing part and upper ends of the motor housing part and the housing part when seen from a direction orthogonal to the fourth surface.

18. An electric pump comprising:
a motor comprising a shaft that is rotatable about a center axis;
a pump mechanism coupled to one side of the shaft in an axial direction;
a circuit substrate located outward in a radial direction orthogonal to the axial direction of the shaft; and
a housing capable of accommodating the motor and the circuit substrate,
wherein the circuit substrate comprises plate surfaces that are a first surface that faces the shaft, follows the axial direction, and comprises an electronic component and a second surface on a side opposite to the first surface,
the housing comprises a motor housing part accommodating the motor, a substrate housing part accommodating the circuit substrate, a pump housing part accommodating the pump mechanism, and an attachment plate part

Assignees

• Nidec Tosok Corp

Inventors

• Nagai Yuzo
• Kataoka Shigehiro
• Kobayashi Yoshiyuki

Classifications

• H02K5/203

  specially adapted for liquids, e.g. cooling jackets · CPC title

• H02K2203/09

  Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations · CPC title

• H02K5/225

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title

• H02K2211/03

  Machines characterised by circuit boards, e.g. pcb · CPC title

• H02K3/50

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