ELECTRIC PUMP

• US 20130136586A1
• Filed: 11/27/2012
• Published: 05/30/2013
• Est. Priority Date: 11/30/2011
• Status: Active Grant

• Current Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.)
• Original Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.)
• Inventors: Kato, Hiroshi, Nakayoshi, Hideki
• Granted Patent: US 9,470,219 B2
• Time in Patent Office: Days
• US Class Current: 415/191
• CPC Class Codes: F01C 21/007 General arrangements of parts; Frames and supporting elements
• CPC Class Codes: F01C 21/10 Outer members for co-operation with rotary pistons; Casings casings for rotary engines or machines in general F16M
• CPC Class Codes: F04B 17/03 driven by electric motors
• CPC Class Codes: F04B 39/121 Casings
• CPC Class Codes: F04B 53/22 Arrangements for enabling ready assembly or disassembly
• CPC Class Codes: F04C 15/0096 Heating; Cooling of machines or engines in general F01P
• CPC Class Codes: F04C 2/102 the two members rotating simultaneously around their respective axes
• CPC Class Codes: F04C 29/047 Cooling of electronic devices installed inside the pump housing, e.g. inverters
• CPC Class Codes: F04D 13/06 the pump being electrically driven
• CPC Class Codes: H02K 11/33 Drive circuits, e.g. power electronics H02K11/38 takes precedence
• CPC Class Codes: H02K 5/08 Insulating casings
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132
• CPC Class Codes: H02K 7/14 Structural association with mechanical loads, e.g. with hand-held machine tools or fans with fan or impeller for cooling the machine H02K9/06

Abstract

An electric pump includes a pump portion, a motor portion including a rotor formed in a cylinder form sharing an axis with a rotation shaft provided at the pump portion and a stator formed in an annular form arranged at an outer periphery of the rotor with a clearance between the stator and the rotor, and a driver portion arranged at a position between the pump portion and the motor portion when viewed in a direction orthogonal to an axial direction of the rotation shaft, the driver portion controlling the motor portion, the driver portion arranged in a state where a portion of the driver portion overlaps with at least a portion of the pump portion or with at least a portion of the motor portion when viewed in the axial direction.

Claims

1. An electric pump, comprising:

a pump portion;

a motor portion including a rotor formed in a cylinder form sharing an axis with a rotation shaft provided at the pump portion and a stator formed in an annular form arranged at an outer periphery of the rotor with a clearance between the stator and the rotor; and

a driver portion arranged at a position between the pump portion and the motor portion when viewed in a direction orthogonal to an axial direction of the rotation shaft, the driver portion controlling the motor portion, the driver portion arranged in a state where a portion of the driver portion overlaps with at least a portion of the pump portion or with at least a portion of the motor portion when viewed in the axial direction.

2. The electric pump according to claim 1, wherein

the pump portion includes a pump housing,

the motor portion includes a motor housing,

the driver portion is contained in a driver containing portion formed by the pump housing and the motor housing, and

the driver portion is fixed to the motor housing.

3. The electric pump according to claim 2, wherein

the pump portion includes a pump cover spanning from the pump portion to the driver portion when viewed in the axial direction, and wherein

the pump cover and the driver containing portion in a direction of the pump housing are connected with a heat release space arranged between the pump cover and the driver containing portion.

4. The electric pump according to claim 3, further comprising:

a heat release sheet provided between the driver portion and the pump housing that forms the driver containing portion in an arrangement where the heat release sheet is in contact with each of the driver portion and the pump housing.

5. The electric pump according to claim 2, further comprising:

a gasket arranged at an interface between the pump housing and the motor housing, wherein

the gasket is arranged in a state where the gasket at least surrounds the rotor and the driver portion.

6. The electric pump according to claim 1, wherein

the pump portion includes a pump housing,

the motor portion includes a motor housing,

the driver portion is contained in a driver containing portion formed by at least one of the pump housing and the motor housing, and

a heat release space is provided between a pump cover the pump housing attaches to and the driver containing portion.

7. The electric pump according to claim 3, wherein a spaced portion is provided on at least one of the pump cover and the driver containing portion to increase the heat release space by increasing a distance between the pump cover and the driver containing portion.

8. The electric pump according to claim 6, wherein a spaced portion is provided on at least one of the pump cover and the driver containing portion to increase the heat release space by increasing a distance between the pump cover and the driver containing portion.

9. An electric pump, comprising:

a pump portion connected to a first side portion of a rotation shaft;

a motor portion including a rotor connected to a second side portion of the rotation shaft and a stator formed in an annular form arranged at an outer periphery of the rotor with a clearance between the stator and the rotor; and

a driver portion arranged at a position between the pump portion and the motor portion in an axial direction of the rotation shaft, the driver portion controlling the motor portion, wherein

at least a portion of the driver portion is either arranged radially inward of the pump portion or radially inward of the motor portion in a radial direction of the rotation shaft.