G-rotor pump assembly

Patent metadata

Field	Value
Publication number	US-2016138587-A1
Application number	US-201414547970-A
Country	US
Kind code	A1
Filing date	Nov 19, 2014
Priority date	Nov 19, 2014
Publication date	May 19, 2016
Grant date	—

Abstract

A G-rotor pump assembly is disclosed. The assembly makes use of a housing having a pump/motor housing portion and a laterally projecting housing portion. An electric motor is disposed within the pump/motor housing portion. A controller has a circuit board with a portion which is positioned within the pump/motor housing portion so as to be generally axially aligned with the electric motor and in proximity to the electric motor. A lower cover is configured to engage with the housing to encapsulate the controller and the electric motor within the housing.

First claim

What is claimed is:

1 . A G-rotor pump assembly comprising:
a housing having a pump/motor housing portion and a laterally projecting housing portion; an electric motor disposed within the pump/motor housing portion; a controller having a circuit board with a portion which is positioned within the pump/motor housing portion so as to be generally axially aligned with the electric motor and in proximity to the electric motor; and a lower cover configured to engage with the housing to encapsulate the controller and the electric motor within the housing.

2 . The G-rotor pump assembly of claim 1 , wherein:
the electric motor includes a motor shaft; and the circuit board of the controller includes an opening to allow a portion of the motor shaft to project through the circuit board.

3 . The G-rotor pump assembly of claim 1 , further comprising an upper cap and a lower cap for assisting in supporting the electric motor within the housing.

4 . The G-rotor pump assembly of claim 1 , wherein the housing includes a pump/motor housing portion and a laterally projecting portion, and wherein portions of the controller are positioned within both the pump/motor housing portion and the laterally projecting portion.

5 . The G-rotor pump assembly of claim 4 , further comprising a lower motor support member configured to be positioned within the pump/motor housing portion for assisting in supporting the electric motor within the housing.

6 . The G-rotor pump assembly of claim 5 , wherein:
the electric motor includes a motor shaft; a bearing is included to help support a distal end of the motor shaft; and a recess is included in the lower motor support member for receiving the bearing.

7 . The G-rotor pump assembly of claim 1 , wherein:
the electric motor includes a stator, an armature disposed for rotational movement within the stator, a motor shaft positioned within the armature and rotationally driven by the armature; and an upper cap and a lower cap positioned on opposing ends of the stator for assisting in securing the stator within the housing.

8 . The G-rotor pump assembly of claim 7 , further comprising:
a first rotor cap for engaging with a first distal end of the motor shaft; a second rotor cap for engaging with a second, opposite distal end of the motor shaft; the first and second rotor caps cooperating to maintain the motor shaft axially coaxially aligned within the stator.

9 . A G-rotor pump assembly comprising:
a housing having a pump/motor housing portion and a laterally projecting housing portion; a lower cover securable to the housing; an electric motor disposed within the pump/motor housing portion; and a controller having a circuit board with a first portion positioned within the pump/motor housing portion so as to be generally axially aligned with the electric motor and in proximity to the electric motor, and a second portion positioned within the laterally projecting portion, and the electric motor and the controller being encapsulated within the housing and the lower cover.

10 . The G-rotor pump assembly of claim 9 , wherein the electric motor includes a stator, an armature disposed for rotation within the stator, and a motor shaft disposed within the armature and rotationally driven by the armature.

11 . The G-rotor pump assembly of claim 10 , wherein:
the controller includes a circuit board; and the circuit board includes an opening in the first portion for allowing a portion of the motor shaft to pass there through.

12 . The G-rotor pump assembly of claim 9 , further including:
a lower motor support member configured to rest within the lower cover; and a bearing for engaging a distal portion of the motor shaft, the bearing being housed in a recess of the lower motor support member.

13 . The G-rotor pump assembly of claim 10 , further comprising first and second bearings adapted to engage opposing distal ends of the motor shaft, the first bearing being supported within the housing and the second bearing being supported within the lower motor support member, and the first and second bearings operating to assist in maintaining the motor shaft axially aligned with a coaxial center of the stator.

14 . The G-rotor pump assembly of claim 9 , further comprising pair of bushings for engaging opposing ends of the motor shaft to help maintain the motor shaft axially aligned with a coaxial center of the stator.

15 . A G-rotor pump assembly comprising:
a housing having a pump/motor housing portion and a laterally projecting housing portion; a lower cover securable to the housing; an electric motor having a stator, an armature and a motor shaft disposed within the pump/motor housing portion; a controller having a circuit board with a first portion positioned within the pump/motor housing portion so as to be generally axially aligned with the electric motor and in proximity to the electric motor, and a second portion positioned within the laterally projecting housing portion, the first portion including an opening for enabling a portion of the motor shaft to pass there through, the first portion further being sandwiched between the electric motor and the lower cover, and the electric motor and the controller being encapsulated within the housing and the lower cover; and a lower motor support member positioned within the lower cover for assisting in supporting the electric motor.

16 . The G-rotor pump assembly of claim 15 , wherein the lower motor support member has a recess, and further including a first bearing positioned in the recess for engaging with a distal portion of the motor shaft to assist in maintaining the motor shaft axially aligned with an axial center of the stator.

17 . The G-rotor pump assembly of claim 16 , further comprising a second bearing positioned in the housing, the first and second bearings cooperating to maintain the motor shaft axially aligned with an axial center of the stator.

Assignees

• American Axle & Mfg Inc

Inventors

• Huang Zugang
• Stuart Charles G

Classifications

• F04C2240/808

  Electronic circuits (e.g. inverters) installed inside the machine · CPC title

• F04C2240/40

  Electric motor · CPC title

• F04C2240/30

  Casings or housings · CPC title

• F04C2/102

  the two members rotating simultaneously around their respective axes · CPC title

• F04C15/008 Primary

  Prime movers · CPC title