Pump assembly with the pump disposed within the plurality of teeth of the motor stator

Patent metadata

Field	Value
Publication number	US-12560166-B2
Application number	US-202318728091-A
Country	US
Kind code	B2
Filing date	Aug 17, 2023
Priority date	Dec 19, 2022
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

A pump assembly includes an axial gap motor including a first stator, a motor rotor and a motor shaft, and a first pump including a first pump rotor configured to be rotated by the motor rotor. The first stator includes a first yoke having an annular shape and a plurality of first teeth disposed on a first surface of the first yoke. The first pump is disposed in a first internal space surrounded by the plurality of first teeth.

First claim

The invention claimed is:

1 . A pump assembly comprising:
an axial gap motor including a first stator, a motor rotor and a motor shaft, the motor rotor including a plurality of magnets; and a first pump including a first pump rotor configured to be rotated by the motor rotor, wherein the first stator includes a first yoke having an annular shape and a plurality of first teeth disposed on a first surface of the first yoke, the plurality of first teeth of the first stator face the plurality of magnets in an axial direction, the first pump is disposed in a first internal space surrounded by the plurality of first teeth, the axial gap motor further includes a motor housing, a part of the motor shaft extends beyond the motor housing, the motor housing includes:
a peripheral wall portion;
a first cover; and
a second cover,
the peripheral wall portion surrounds an outer diameter of the first stator, and the first cover seals a first end portion of the peripheral wall portion.

2 . The pump assembly according to claim 1 ,
wherein the first pump rotor is coaxially fixed to the motor shaft.

3 . The pump assembly according to claim 1 ,
wherein the first pump has an inlet port and an outlet port, wherein the inlet port and the outlet port are arranged in a first direction as viewed from the first pump rotor, and wherein the first direction is a direction along an axis of the motor shaft and is a direction away from the motor rotor.

4 . The pump assembly according to claim 1 ,
wherein the first pump is an internal gear pump including an external gear and an internal gear, and wherein the external gear is the first pump rotor.

5 . The pump assembly according to claim 4 ,
wherein the motor housing is configured to house the first stator and the motor rotor, wherein the internal gear pump includes a pump housing configured to house the external gear and the internal gear, wherein the motor housing includes a base portion to which the first yoke is fixed, wherein the pump housing includes:
a body including a cylindrical portion, a bottom portion, and an annular flange portion, the cylindrical portion being configured to cover an outer periphery of the internal gear, the bottom portion being configured to seal a first end surface of the cylindrical portion, and the annular flange portion extending toward an outside of the cylindrical portion from an outer peripheral surface of the cylindrical portion at a position near a second end surface of the cylindrical portion,
a pump cover configured to seal an opening of the cylindrical portion at the second end surface, and
a bolt configured to fix the pump cover to the annular flange portion, and
wherein the annular flange portion constitutes the base portion.

6 . The pump assembly according to claim 1 ,
wherein the first pump is a vane pump, and wherein the first pump rotor includes a plurality of vanes.

7 . The pump assembly according to claim 1 , further comprising:
a second pump including a second pump rotor configured to be rotated by the motor rotor, wherein the axial gap motor further includes a second stator disposed such that the motor rotor is interposed between the first stator and the second stator, wherein the second stator includes a second yoke having an annular shape and a plurality of second teeth disposed on a second surface of the second yoke, and wherein the second pump is disposed in a second internal space surrounded by the plurality of second teeth.

8 . The pump assembly according to claim 1 , further comprising:
a pump housing accommodating the first pump rotor, wherein the pump housing includes a peripheral wall portion, a first cover which seals a first end portion of the peripheral wall portion, and a second cover which seals a second end portion of the peripheral wall portion, and wherein the motor shaft penetrates the second cover.

9 . The pump assembly according to claim 8 ,
wherein the second cover includes at least one recess formed on an inner surface facing the first pump rotor.

10 . The pump assembly according to claim 9 ,
wherein the at least one recess includes two recesses provided at positions facing each other across the motor shaft.

Assignees

• Sumitomo Electric Sintered Alloy Ltd
• Sumitomo Electric Industries

Inventors

• Takada Shoichi
• Yoshida Kentaro
• Saito Tatsuya
• Ueno Tomoyuki

Classifications

• F04C15/00 Primary

  Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00 (of pumps specially adapted for elastic fluids F04C18/00 - F04C29/00) · CPC title

• F04C11/008 Primary

  Enclosed motor pump units · CPC title

• F04C2/344

  with vanes reciprocating with respect to the inner member · CPC title

• F04C2240/40

  Electric motor · CPC title

• F04C15/0061

  Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions · CPC title