Electric oil pump apparatus and base plate for electric oil pump

Patent metadata

Field	Value
Publication number	US-10962003-B2
Application number	US-201815921706-A
Country	US
Kind code	B2
Filing date	Mar 15, 2018
Priority date	Mar 23, 2017
Publication date	Mar 30, 2021
Grant date	Mar 30, 2021

Abstract

An electric oil pump apparatus includes an electric oil pump including a housing main body that accommodates a motor and a pump driven by the motor, a flange portion formed on the housing main body, and a control circuit case for accommodating a control circuit, and a base plate attached to the electric oil pump. The base plate includes an annular main body fixed to the housing main body, and a sealing member located between the annular main body and the housing main body. The annular main body includes a first surface located on one side, a second surface located on the other side, a first through hole for passing the housing main body therethrough, and an annular stepped portion configured to accommodate the sealing member, and formed along an inner edge of the first through hole. The first surface of the base plate is opposed to the flange portion.

First claim

What is claimed is:

1. An electric oil pump apparatus comprising:
an electric oil pump including:
a cylindrical housing main body that accommodates a motor having an output shaft that rotates about a central axis extending in an axial direction, and a pump driven by the motor;
a flange portion extending radially outward from an outer circumferential surface of the housing main body; and
a control circuit case provided on one side of the flange portion in the axial direction, and in which a control circuit that controls the motor is accommodated; and
a base plate attached to the electric oil pump, and including:
an annular main body fixed to the outer circumferential surface of the housing main body; and
a sealing member located between the annular main body and the housing main body,
wherein the annular main body includes:
a first surface located on one side in the axial direction;
a second surface located on the other side in the axial direction;
a first through hole through which the housing main body is passed; and
an annular stepped portion configured to accommodate the sealing member, and formed along an inner edge of the first through hole, and
the base plate is fastened such that the first surface is opposed to the flange portion.

2. The electric oil pump apparatus according to claim 1 ,
wherein the second surface includes an annular groove for an annular sealing member to be accommodated.

3. The electric oil pump apparatus according to claim 2 ,
wherein the annular sealing member accommodated in the groove includes a projection formed in a radial direction.

4. The electric oil pump apparatus according to claim 1 ,
wherein the base plate includes a second through hole for a terminal in the control circuit case to be connected, at a position outside the housing main body, to a component provided outside the housing main body, the second through hole including an annular stepped portion configured to accommodate the sealing member, and formed along an inner edge.

5. The electric oil pump apparatus according to claim 4 ,
wherein the pump includes:
a pump rotor that can be driven by the motor;
a pump body that covers the pump rotor from one side in the axial direction; and
a pump cover that covers the pump rotor from the other side in the axial direction, and
the pump cover protrudes radially outward from an outer circumferential surface of the housing main body, on the other side of the housing main body in the axial direction, and at least one of a solenoid valve and a pressure sensor are attached to the pump cover.

6. The electric oil pump apparatus according to claim 1 ,
wherein the electric oil pump includes a busbar assembly accommodated inside an end portion of the housing main body in the axial direction and connected to the motor, and the base plate overlaps at least a part of the busbar assembly, in the radial direction.

7. The electric oil pump apparatus according to claim 1 ,
wherein the electric oil pump includes a terminal connected to one side of the busbar assembly in the axial direction, and to the control circuit, and the base plate overlaps at least a part of the terminal, n the radial direction.

8. The electric oil pump apparatus according to claim 1 ,
wherein the electric oil pump includes a control circuit cover that covers the control circuit case, located on one side of the control circuit case in the axial direction and fastened to the housing main body with a fastening member, and
the base plate includes a third through hole for fastening the control circuit cover with the fastening member, and a fourth through hole fastening a joint face of an external device with another fastening member, and the sealing member is located on an inner side with respect to the third through hole and the fourth through hole.

9. The electric oil pump apparatus according to claim 8 ,
wherein a plurality of the third through hole and a plurality of the fourth through hole are alternately aligned in a circumferential direction of the base plate.

10. The electric oil pump apparatus according to claim 9 ,
wherein the control circuit case includes an opening extending in any given direction orthogonal to the axial direction, one of the third through holes closest to the opening is located on a side of the central axis, with respect to one of the fourth through holes closest to the opening.

11. The electric oil pump apparatus according to claim 1 ,
wherein the housing main body includes a press-formed material.

12. The electric oil pump apparatus according to claim 1 ,
wherein the first surface of the base plate directly physically contacts the flange portion.

13. The electric oil pump apparatus according to claim 1 ,
wherein a fastener is provided to directly pass through both the base plate and the flange portion.

14. A base plate for an electric oil pump, the electric oil pump including:
a cylindrical housing main body that accommodates a motor having an output shaft that rotates about a central axis extending in an axial direction, and a pump driven by the motor;
a flange portion extending radially outward from an outer circumferential surface of the housing main body; and
a control circuit case provided on one side of the flange portion in the axial direction, and in which a control circuit that controls the motor is accommodated,
the base plate comprising:
an annular main body fixed to the outer circumferential surface of the housing main body; and
a sealing member located between the annular main body and the housing main body,

wherein the annular main body includes:
a first surface located on one side in the axial direction;
a second surface located on the other side in the axial direction;
a first through hole through which the housing main body is passed; and
an annular stepped portion configured to accommodate the sealing member, and formed along an inner edge of the first through hole.

15. The base plate according to claim 14 ,
wherein the second surface includes an annular groove for an annular sealing member to be accommodated.

16. The base plate according to claim 14 , further comprising a second through hole for a terminal in the control circuit case to be connected, at a position outside the housing main body, to a component provided outside the housing main body, the second through hole including an annular stepped portion configured to accommodate the sealing member, and formed along an inner edge.

17. The base plate according to claim 14 ,
wherein the first surface of the base plate directly physically contacts the flange portion.

18. The base plate according to claim 14 ,
wherein a fastener is provided to directly pass through both the base plate and the flange portion.

Assignees

• Nidec Tosok Corp

Inventors

• Kataoka Shigehiro
• Kobayashi Yoshiyuki
• Higuchi Koji

Classifications

• F04C15/0034 Primary

  for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine · CPC title

• F04C2240/40

  Electric motor · CPC title

• F01M2001/0284

  mounting of the pump · CPC title

• F01C21/10

  Outer members for co-operation with rotary pistons; Casings (casings for rotary engines or machines in general F16M) · CPC title

• F04C2240/30

  Casings or housings · CPC title