JP2020187927A - Electric motor, electric pump, and connector manufacturing method - Google Patents

Abstract

To provide an electric motor which can be inexpensive and miniaturized while increasing the degree of freedom in the direction of connecting and disconnecting a connector extending from an external power supply, and to provide an electric pump, and a connector manufacturing method.SOLUTION: A housing connection port 62 of a connector portion 60 includes a connector-side in-row portion 67 and a connector-side seal portion 66 formed coaxially with and on the same surface as the connector-side in-row portion 67, and a connection port 48 of a housing 11 includes a housing-side in-row portion 54 that is fitted so as to come into contact with the connector-side in-row portion 67, and a housing-side seal portion 55 that is coaxial with the housing-side in-row portion 54, is formed to have a step portion 56 between the housing-side in-row portion 54 and itself, and faces the connector-side seal portion 66 with a predetermined gap in the radial direction, and an O-ring 57 is arranged between the connector-side seal portion 66 and the housing-side seal portion 55.SELECTED DRAWING: Figure 7

Description

The present invention relates to a method for manufacturing an electric motor, an electric pump, and a connector.

In order to supply power to an electric motor such as an electric motor, the electric motor may be provided with a terminal, and this terminal may be connected to a connector extending from an external power source. As a structure for this connection, there is a case where a power supply side connector insertion hole is provided in the housing in which the electric motor is housed, and the terminal is exposed in the power supply side connector insertion hole. The terminal of the connector extending from the external power supply is connected to the terminal of the electric motor by inserting the connector into the connector insertion hole on the power supply side.

Here, the terminal exposed in the connector insertion hole on the power supply side and the connection portion of the terminal of the connector connected to this terminal extend in parallel with the insertion / removal direction of the connector. Therefore, the connector can be inserted into the connector insertion hole on the power supply side, and the terminal of the electric motor and the terminal of the connector can be connected. That is, the direction of connecting the terminal of the electric motor and the terminal of the connector and the direction of inserting and removing the connector are the same. Further, in such a case, a seal member such as an O-ring is provided between the inner surface of the power supply side connector insertion hole and the outer surface of the connector, and the power supply side connector insertion hole and the connector have a simple structure. It is possible to secure the sealing property between the two.

Japanese Unexamined Patent Publication No. 63-155276

By the way, due to layout restrictions, there are cases where it is desired to intersect the connection direction between the terminal of the electric motor and the terminal of the connector and the insertion / removal direction of the connector. In such a case, it is necessary to change the design of the housing, which may be costly.

Further, for example, it is conceivable to provide an adapter connector to which this connector can be attached separately from the connector extending from the external power supply, and attach the adapter connector to the housing. In this case, in order to ensure the sealing property between the housing and the adapter connector, the housing and the adapter connector may become large. That is, since the connection direction between the motor terminal and the connector terminal and the connector insertion / removal direction intersect, the sealing property between the housing and the adapter connector is impaired by the load applied when the connector is inserted / removed. There is a possibility that it will end up. If an attempt is made to increase the joint strength of the housing and the adapter connector without impairing the sealing property, the housing and the adapter connector may become large.

Therefore, the present invention provides an electric motor, an electric pump, and a connector manufacturing method that can be inexpensive and miniaturized while increasing the degree of freedom in the insertion / removal direction of the connector extending from the external power source.

In order to solve the above problems, the electric motor according to the present invention has a tubular shape in which a connector having a base portion and a tubular housing connection port protruding from the base portion and the housing connection port are fitted. A housing having a connector connection port and a sealing member for sealing between the housing connection port and the connector connection port are provided, and the housing connection port is coaxial with the connector side inlay portion and the connector side inlay portion. The connector side inlay portion is fitted with a connector side seal portion formed on the same surface, and the connector connection port is fitted so as to be in contact with the connector side inlay portion, and the housing side inlay portion. The connector has a housing-side seal portion that is coaxial with the portion and is formed via a step portion with the housing-side in-row portion and faces the connector-side seal portion with a predetermined gap in the radial direction. The sealing member is arranged between the side sealing portion and the housing side sealing portion.

In the above configuration, the housing connection port is fitted inside the connector connection port in the radial direction, and the housing side seal portion is formed with an enlarged diameter with respect to the housing side inlay portion via the step portion. The seal member may be arranged between the outer surface of the connector-side seal portion and the inner surface of the housing-side seal portion.

In the above configuration, the connector is formed so as to extend from the outer surface of the housing connection port in the base portion, has at least one leg portion for fixing the connector to the housing, and has the leg portion. Has a leg-side contact surface that abuts on the housing and a through hole that is formed so as to penetrate the leg-side contact surface and through which a fixing member is inserted, and the housing has the leg. The connector connection port has a housing-side contact surface to which the portion-side contact surface is abutted and a fixing hole formed on the housing-side contact surface and to which the fixing member is fixed. The housing-side seal portion may be arranged on the side opposite to the housing-side contact surface so as to protrude from the side contact surface and sandwich the housing-side in-row portion.

In the above configuration, the distance between the leg-side contact surface and the end portion of the connector-side in-row portion opposite to the connector-side seal portion is La, and the housing-side contact surface and the said. When the distance between the tip of the connector connection port and the tip of the connector is Lb, the distances La and Lb may satisfy La <Lb.

In the above configuration, the leg portion has at least one positioning rib protruding from the inner side surface facing the connector connection port in a radial direction orthogonal to the axial direction of the connector connection port, and the connector connection port is formed by the connector connection port. The positioning rib may be brought into contact with the flat surface having a flat surface on the outer surface facing the inner side surface of the leg portion in the radial direction.

In the above configuration, the connector has an external connector connection portion to which an external connector is connected, and the external connector connection portion includes a neck portion extending coaxially from the base portion to the housing connection port and the housing from the neck portion. An external connector connection port extending in a direction intersecting the axial direction of the connection port and to which the external connector is connected, and a reinforcing rib formed so as to straddle the neck portion and the base portion may be provided.

In the above configuration, the housing connection port includes a connector-side terminal having a connector-side connection surface that intersects the axial direction of the housing connection port and the connector connection port, and the connector connection port intersects the axial direction. A housing-side terminal having a housing-side connecting surface that is in contact with the connector-side connecting surface is provided, and at least one of the connector-side terminal and the housing-side terminal is a terminal body along the axial direction and the terminal. It has a tongue piece portion that is bent and extended from the tip end of the main body and tilts in a direction away from the terminal main body toward the tip end, and the tongue piece portion includes the connector side connection surface and the housing side connection surface. The connector side connection surface and the housing side connection surface are arranged at an angle between the connector side connection surface and the housing side connection surface so that the terminal body side opens. You may.

In the above configuration, the connector is made of resin, and the connector has a connector-side terminal, a premolded body in which at least a part of the connector-side terminal is embedded, and the premolded body in which the connector is embedded. The base portion with exposed side terminals may be provided.

In the above configuration, the premolded body is projected onto one surface of the plate-shaped main body portion in which the connector side terminal is embedded and the main body portion, and a T-shaped turbulent flow generation convex when viewed from the normal direction of the one surface. And may have.

The electric pump according to the present invention includes the electric motor described above, a pump unit connected to the electric motor and driven by the electric motor, and the electric motor is housed in the housing and via the housing connection port. It is characterized in that it has a motor unit provided with a power supply terminal for supplying power, and the motor unit and the pump unit are connected to each other.

In the connector manufacturing method according to the present invention, a base portion having a second surface facing the first surface of the housing, a tubular housing connection port protruding from the second surface of the base portion, and the base portion A tubular connector provided with a premolded body to be embedded and a connector side terminal embedded in the premolded body and partially exposed to the housing connection port, and formed on the first surface of the housing. A connector manufacturing method for a connector in which the outer surface of the housing connection port is fitted to the inner surface of the connection port. The premolded body in which the connector side terminal is embedded is set in a mold, and the base portion of the base portion is set. The base portion is molded so that the second surface serves as a parting line of the mold.

According to the present invention, it is possible to secure the sealing property between the housing connection port and the connector connection port in a space-saving manner while ensuring the fitting strength between the housing connection port and the connector connection port with a simple structure. Therefore, for example, when the external connector is mounted on the side opposite to the housing connection port of the connector, the insertion / removal direction of the external connector and the fitting direction of the housing connection port and the connector connection port intersect. Even so, the electric motor and the electric pump can be miniaturized.

FIG. 5 is a side view showing a cross section of a pump unit and a control device of the electric pump according to the embodiment of the present invention. The perspective view of the bracket in embodiment of this invention seen from the pump case side. The perspective view of the housing in embodiment of this invention seen from the opening side. The perspective view of the connector part seen from the lower side in embodiment of this invention. The perspective view of the connector part seen from above in Embodiment of this invention. The perspective view of the connector side terminal unit in embodiment of this invention. A cross-sectional view taken along the line AA of FIG. The explanatory view of the molding method of the connector part in embodiment of this invention. The explanatory view which shows the process until the housing side terminal and the connector side terminal are connected in embodiment of this invention.

Next, an embodiment of the present invention will be described with reference to the drawings.

(Electric pump)
FIG. 1 is a side view showing a cross section of the pump unit 3 and the control device 5 of the electric pump 1.
The electric pump 1 is for supplying oil to a hydraulic device such as a mission mounted on an automobile (not shown), for example.
As shown in FIG. 1, the electric pump 1 is arranged inside the oil tank T in which the oil O is stored. The electric pump 1 includes a motor device (corresponding to an electric motor in the claim) 2 and a pump unit 3 integrated with the motor device 2 and driven by the motor device 2.

(Motor device)
The motor device 2 includes a motor unit 4 and a control device 5 that is integrally provided with the motor unit 4 and for driving the motor unit 4. The motor unit 4 is a so-called brushless motor. The motor unit 4 includes a bottomed tubular motor case 6, a stator (not shown) housed inside the motor case 6, and a rotor 110 rotatably supported by the stator. The rotating shaft 111 of the rotor 110 is rotatably supported by the pump unit 3 and the control device 5. A sensor magnet 41 is provided at one end 111a on the control device 5 side of the rotating shaft 111. The sensor magnet 41 constitutes one of the rotation position detection sensors 43, which will be described later, provided in the control device 5.

The motor case 6 is molded by, for example, aluminum die casting. The axial direction of the motor case 6 coincides with the rotation axis C of the rotation shaft 111. The electric pump 1 is arranged inside the oil tank T so that the rotation axis C of the rotation shaft 111 is oriented along the horizontal direction. Then, a part of the motor device 2 (in FIG. 1, substantially the lower half centered on the rotation axis C) is immersed in the oil O.
In the following description, the rotation axis C direction is simply referred to as an axial direction, the rotation direction of the rotor 110 (rotation axis 111) is referred to as a circumferential direction, and the axial direction and the direction orthogonal to the circumferential direction are referred to as a radial direction. Further, in the following description, when the electric pump 1 is arranged in the oil tank T, the direction parallel to the horizontal direction and orthogonal to the axial direction is expressed as the X direction, and the direction coincident with the vertical direction is expressed as the Y direction. There is.

(Pump section)
The pump portion 3 is housed in a bracket 21 integrally molded on the bottom 6a of the motor case 6, a substantially cylindrical pump case 22 attached to the side of the bracket 21 opposite to the motor case 6, and a pump case 22. The pump rotor portion 23 and the pump cover 24 that covers the pump case 22 from the side opposite to the bracket 21 are provided.

FIG. 2 is a perspective view of the bracket 21 as viewed from the pump case 22 side.
As shown in FIGS. 1 and 2, a through hole 25 penetrating in the axial direction is formed at the center of the bracket 21 in the radial direction. The rotation shaft 111 is inserted through the through hole 25. The other end 111b of the rotating shaft 111 projects toward the pump case 22 through the through hole 25 of the bracket 21.
On the motor case 6 side of the bracket 21, a seal storage recess 26 that surrounds the through hole 25 and communicates with the through hole 25 is formed. An oil seal 27 is provided in the seal storage recess 26. The oil seal 27 is for preventing oil from entering the motor device 2 side through the gap between the through hole 25 and the rotating shaft 17.

The bracket 21 is formed with a suction port 28 and a discharge port 29 radially outside the through hole 25. The suction port 28 and the discharge port 29 are arranged so as to be distributed in the radial direction about the through hole 25. The oil O in the oil tank T in which the oil O is stored is sucked into the suction port 28. In the discharge port 29, the oil O sucked from the suction port 28 is discharged via the pump unit 3. The discharge port 29 is connected to a hydraulic device such as a mission via a pipe (not shown).

The end surface 21a of the bracket 21 on the pump case 22 side cooperates with the pump case 22 and the pump rotor portion 23 to prevent oil from leaking from between the pump case 22 and the pump rotor portion 23 and the bracket 21. It becomes a sealing surface. A substantially semicircular suction oil passage 31 and a discharge oil passage 32 along the circumferential direction are formed on the end surface 21a on the pump case 22 side. The suction oil passage 31 and the discharge oil passage 32 are distributed and arranged around the through hole 25. The suction oil passage 31 communicates with the suction port 28. The discharge oil passage 32 communicates with the discharge port 29.

Further, a bypass groove 33 that communicates the through hole 25 and the suction oil passage 31 is formed in the end surface 21a of the bracket 21. The bypass groove 33 guides the oil O between the through hole 25 and the rotating shaft 17 to the suction oil passage 31.
Further, the end surface 21a of the bracket 21 is formed with an O-ring groove 34 for improving the sealing property between the end surface 21a and the pump case 22. By mounting an O-ring (not shown) in the O-ring groove 34, the sealing property between the bracket 21 and the pump case 22 is surely secured.

In addition, the bracket 21 is formed with three bolt seats 35 on the outer peripheral surface at equal intervals in the circumferential direction. A female screw portion 35a is engraved on each bolt seat 35. The bolt seat 35 is for fastening and fixing the pump case 22 and the pump cover 24 to the bracket 21.

As shown in FIG. 1, the pump case 22 is formed by, for example, aluminum die casting. The radial inside of the pump case 22 is a pump chamber 36.
The pump rotor portion 23 housed in the pump case 22 includes a pump outer rotor 37 rotatably fitted to the inner peripheral surface of the pump case 22 and a pump inner rotor provided inside the pump outer rotor 37 in the radial direction. 38 and. The pump inner rotor 38 is rotatably arranged in an eccentric state with respect to the pump outer rotor 37. The other end 111b of the rotating shaft 111 is fixed to such a pump inner rotor 38.

Under such a configuration, a so-called trochoid type pump is configured by the pump outer rotor 37 and the pump inner rotor 38. That is, the operating chamber that sucks the oil O and discharges the sucked oil O by changing the volume of the space formed by the internal teeth (not shown) of the pump outer rotor 37 and the external teeth (not shown) of the pump inner rotor 38. 39 is formed. In the operating chamber 39, the space surrounded by the bracket 21, the pump outer rotor 37, the pump inner rotor 38, and the pump cover 24 is configured as the volume change chambers 39a and 39b.

Of the volume change chambers 39a and 39b, the volume change chamber 39a corresponding to the suction oil passage 31 communicates with the suction oil passage 31. Of the volume change chambers 39a and 39b, the volume change chamber 39b corresponding to the discharge oil passage 32 communicates with the discharge oil passage 32. As a result, the oil O sucked from the suction port 28 is pumped from the discharge port 29 via the suction oil passage 31, the volume change chamber 39a, the volume change chamber 39b, and the discharge oil passage 32.

Bolt insertion holes (not shown) are formed on the outer peripheral surface of the pump case 22 and the pump cover 24. A bolt (not shown) is inserted into these bolt insertion holes from the side opposite to the pump case 22 of the pump cover 24, and the bolt is screwed into the female screw portion 35a of the bracket 21. As a result, the pump case 22 and the pump cover 24 are fastened together with the bracket 21.

(Control device)
The control device 5 includes a control unit 40 and a connector unit (corresponding to the connector in the claims) 60 provided on one side of the control unit 40.
The control unit 40 is arranged between the control case 7 integrally molded in the opening 6b of the motor case 6, the holder 8 housed in the control case 7, and the holder 8 and the motor unit 4, and is arranged in the holder 8. It includes a supported circuit board 9. The pump unit 3, the motor unit 4, and the control device 5 are arranged side by side in the axial direction.

A switching element such as a FET (Field Effect Transistor), a choke coil (none of which is shown), and a capacitor 18 are mounted on the circuit board 9. The switching element controls a current supplied to a coil (not shown) of the motor unit 4. The choke coil and the capacitor 18 function as a miscellaneous protection element.
Further, on the circuit board 9, the magnetic detection element 42 is mounted at a position facing the one end 111a of the rotating shaft 111 in the axial direction. The magnetic detection element 42 detects a change in the magnetism of the sensor magnet 41 provided at one end 111a of the rotating shaft 111. The sensor magnet 41 and the magnetic detection element 42 constitute a rotation position detection sensor 43 that detects the rotation position of the rotation shaft 111 (rotor).

Further, the circuit board 9 is provided with a housing-side terminal unit 44. The housing-side terminal unit 44 includes a plurality of housing-side terminals 45 and a resin molded body 46 that integrates the housing-side terminals 45. By embedding each housing side terminal 45 in the resin molded body 46, a plurality of housing side terminals 45 are integrated in a state of being insulated from each other.
Each housing-side terminal 45 is bent and extended so as to be elongated in the radial direction when viewed from the axial direction. Both ends of the housing-side terminal 45 in the longitudinal direction are exposed from the resin mold body 46. One end 45a of each housing side terminal 45 is arranged at a position facing the circuit board 9 in the axial direction. The other end 45b of each housing side terminal 45 projects toward the connector portion 60 side.

One end 45a of each housing side terminal 45 on the circuit board 9 side is connected to a power supply terminal 4a extending from the motor unit 4. As a result, the circuit board 9 and the coil (not shown) of the motor unit 4 are electrically connected.
A housing-side tongue piece portion 47 projecting from the resin molded body 46 in the axial direction is formed at the other end 45b of each housing-side terminal 45 on the connector portion 60 side. The surface of the housing-side tongue piece portion 47 on the connector portion 60 side is a housing-side connection surface 47a that abuts on the connector-side connection surface 92a of the connector-side terminal 83 described later in the connector portion 60.

The control case 7 is made of resin. The control case 7 includes a box-shaped housing 11 having an opening 11a on the side opposite to the motor portion 4, and a plate-shaped cover 12 that closes the opening 11a of the housing 11. The housing 11 is formed in a substantially quadrangular shape when viewed from the axial direction. The holder 8 and the circuit board 9 are housed in the housing 11. Most of the bottom portion 11b of the housing 11 is open corresponding to the opening portion 6b of the motor case 6. As a result, the inside of the housing 11 and the inside of the motor case 6 are communicated with each other. The cover 12 is fastened and fixed to the housing 11 by bolts 13.

FIG. 3 is a perspective view of the housing 11 as viewed from the opening 11a side.
As shown in FIGS. 1 and 3, of the peripheral wall 11c of the housing 11, the side surface (upper surface in the Y direction, corresponding to the first surface in the claim) 11d facing the connector portion 60 side is on the connector portion 60 side. The connector connection port 48 is integrally molded. The connector connection port 48 is formed by integrally molding a base portion 51 protruding from the side surface 11d of the housing 11 toward the connector portion 60 (along the Y direction) and a cylindrical portion 52 protruding from the base portion 51. is there. The base portion 51 is formed in a substantially rectangular shape that is long in the X direction when viewed from the Y direction. Both ends of the base portion 51 in the longitudinal direction (X direction) are formed in a curved shape that smoothly rises from the side surface 11d of the housing 11. A flat surface 51a having a normal direction in the X direction is formed in most of the curved shapes.

Further, the connector connection port 48 is formed with a stepped cylindrical inner peripheral surface 53 whose axial direction is the Y direction over the entire cylindrical portion 52 and the base portion 51 so as to correspond to the shape of the cylindrical portion 52. Has been done. The stepped cylindrical inner peripheral surface 53 is formed on the housing-side inro portion 54 formed at a portion corresponding to the base portion 51, the step portion 56 formed at the boundary between the base portion 51 and the cylindrical portion 52, and the cylindrical portion 52. It is composed of a housing-side seal portion 55 formed at a corresponding portion and having a diameter expanded through a step portion 56 rather than a housing-side in-row portion 54. An O-ring 57 (see FIG. 1) is attached to the step portion 56. The O-ring 57 is for ensuring the sealing property between the connector connection port 48 and the connector portion 60.

(Connector part)
FIG. 4 is a perspective view of the connector portion 60 as viewed from below. FIG. 5 is a perspective view of the connector portion 60 as viewed from above.
As shown in FIGS. 1, 4, and 5, the connector portion 60 is made of resin. The connector portion 60 is formed so as to have a substantially disk-shaped base portion 61, a housing connection port 62 projecting on the control portion 40 side of the base portion 61, and a projecting portion on the side opposite to the control portion 40 of the base portion 61. It includes an external connector connecting portion 63, a base portion 61, a housing connecting port 62, and a connector-side terminal unit 80 embedded in a part of the external connector connecting portion 63.

On the outer peripheral surface of the base portion 61 and on the side opposite to the control portion 40, a reduced diameter portion 65 whose diameter is reduced via the step portion 61a is formed. The external connector connecting portion 63 projects from the end surface 65a of the reduced diameter portion 65 on the side opposite to the stepped portion 61a.
Further, the base portion 61 has an end surface (corresponding to the second surface in the claims) 61b facing the side surface 11d of the housing 11 in the Y direction. The housing connection port 62 projects from the radial center of the end surface 61b. A plurality of recesses 64 are formed in the end surface 61b of the base portion 61 so as to surround the housing connection port 62. The recess 64 has a role of reducing the weight of the connector portion 60 and also has a role of making the wall thickness of the connector portion 60 uniform as a whole and improving the moldability of the connector portion 60.

The housing connection port 62 is formed in a cylindrical shape along the Y direction. The housing connection port 62 includes a connector-side seal portion 66 rising from the end surface 61b of the base portion 61, and a connector-side in-row portion 67 integrally molded at the tip of the connector-side seal portion 66. The connector-side seal portion 66 and the connector-side inlay portion 67 are formed coaxially and on the same surface. That is, the outer diameter of the connector side seal portion 66 and the outer diameter of the connector side inlay portion 67 are the same. The outer diameter of the housing connection port 62 (the outer diameter of the connector side seal portion 66 and the outer diameter of the connector side inro portion 67) is the same as or slightly smaller than the inner diameter of the housing side inro portion 54 at the connector connection port 48 of the housing 11. Is.

Legs 68a and 68b are integrally molded on both sides of the end surface 61b of the base portion 61 with the housing connection port 62 interposed therebetween. The two legs 68a and 68b are formed symmetrically about the housing connection port 62, and have the same basic configuration. Therefore, in the following description, only one leg 68a of the two legs 68a and 68b will be described, and the other leg 68b will be designated by the same reference numeral as one leg 68a and the description will be omitted. To do. In addition, the other leg portion 68b will be described as necessary.

The leg portion 68a protrudes from the end surface 61b of the base portion 61 toward the control portion 40 side and from the tip of the leg portion main body 71 on the control portion 40 side to the side opposite to the housing connection port 62. The fixing portion 72 and the fixing portion 72 are integrally molded. The leg body 71 is formed in a rectangular shape that is long in the axial direction when viewed from the Y direction. Further, the leg body 71 is arranged so that the normal direction of the side surface in the lateral direction is along the X direction. Two positioning ribs 73 along the Y direction are formed so as to project on the inner side surface 71a of the leg body 71 facing the housing connection port 62 side.

Here, the length L1 between the positioning ribs 73 formed on the two legs 68a and 68b is the length L2 between the two flat surfaces 51a formed on the base portion 51 of the housing 11 (FIG. 7) is the same as or slightly larger than (see 7).
Further, a meat stealing portion 71c is recessed at the tip of the leg main body 71. The meat stealing portion 71c has a role of reducing the weight of the connector portion 60 and also has a role of making the wall thickness of the connector portion 60 uniform as a whole and improving the moldability of the connector portion 60.

The fixed portion 72 integrally molded with the tip of the leg portion main body 71 is formed in a flat plate shape along the axial direction and the X direction. The flat surface 72a on the control unit 40 side of the fixed unit 72 is formed in the same plane as the tip surface 71b of the leg body 71. A substantially semicircular round chamfered portion 72b is formed at the tip of the fixed portion 72 opposite to the housing connection port 62. A through hole 72c that penetrates in the thickness direction (Y direction) is formed in the fixed portion 72. A flanged collar 74 is fitted into the through hole 72c.

The flange portion 75 of the flanged collar 74 is in contact with the flat surface 72a of the fixing portion 72. As a result, the flanged collar 74 is positioned with respect to the fixed portion 72. A bolt (corresponding to the fixing member in the claim) 70 (see FIG. 7) is inserted through the flanged collar 74. The connector portion 60 is fastened and fixed to the housing 11 of the control portion 40 by the bolt 70. The flat surface of the flange portion 75 of the flanged collar 74 exposed to the control portion 40 side is the leg side contact surface 75a that comes into contact with the side surface 11d of the housing 11 when the connector portion 60 is fastened and fixed to the housing 11. It is said that.

An external connector extending from an external power supply (not shown) is connected to the external connector connection unit 63. The external connector connection portion 63 has a substantially L-shaped cross section, and has a neck portion 76 protruding from the end surface 65a of the reduced diameter portion 65 of the base portion 51 along the Y direction and an end of the neck portion 76 opposite to the base portion 51. The external connector connection port 77, which is bent and extended along the axial direction from the above, is integrally molded.

The neck portion 76 is formed in a flat plate shape along the X direction and the Y direction. Three reinforcing ribs 78 are integrally molded on the flat surface 76a on the motor device 2 side of the neck portion 76. Each reinforcing rib 78 is formed along the Y direction over the entire flat surface 76a at the neck portion 76. Further, each reinforcing rib 78 is formed so as to straddle the neck portion 76 and the end surface 65a of the diameter reduction portion 65. The reinforcing rib 78 is formed in a substantially triangular shape so as to taper toward the external connector connection port 77 when viewed from the X direction.

The external connector connection port 77 is formed in a square tubular shape. Further, the external connector connection port 77 is formed in a rectangular shape that is long in the X direction when viewed from the axial direction. The external connection tongue piece portion 93 of the connector side terminal unit 80 is exposed in the external connector connection port 77.

FIG. 6 is a perspective view of the connector side terminal unit 80.
As shown in FIGS. 1, 5, and 6, the connector-side terminal unit 80 is embedded in a part of the base portion 61, the housing connection port 62, and the external connector connection portion 63 when the connector portion 60 is formed. The connector. The connector-side terminal unit 80 has a flat plate-shaped premolded body 82 along the X and Y directions and a resin premolded body 82 long in the Y direction, and a plurality of terminals (4 in the present embodiment) embedded in the premolded body 82. It is provided with a connector side terminal 83.

The premolded body 82 is a flat plate-shaped body along the X and Y directions, and is integrally formed with a main body 84 long in the Y direction and an end portion of the main body 84 on the housing connection port 62 side in the longitudinal direction. A housing connection port fitting portion 85 and an external connector connection port fitting portion 86 integrally formed at an end portion of the main body portion 84 on the side of the external connector connection portion 63 in the longitudinal direction are provided.

Two openings 89 are formed on the outer connector connection port fitting portion 86 side of the main body portion 84 from the center in the longitudinal direction (Y direction). The two openings 89 are formed in a rectangular shape that is long in the Y direction when viewed from the axial direction (thickness direction of the main body portion 84). The two openings 89 are arranged side by side in the X direction. A part of the connector side terminal 83 is exposed through the two openings 89. The opening 89 is used to insert and mold a plurality of connector-side terminals 83 into the premolded body 82 and then divide each connector-side terminal 83 (details will be described later).

A rising wall 87 is integrally molded on a flat surface (corresponding to one surface in the claims) 84a of the main body 84 on the side opposite to the motor device 2 in the axial direction at the end on the housing connection port fitting portion 85 side. There is. A turbulent flow generating convex portion 88 is formed so as to extend so as to straddle the rising wall 87 and the flat surface 84a.
The turbulent flow generating convex portion 88 intentionally disturbs the resin flow when molding the base portion 61, the housing connection port 62, and the external connector connection portion 63, thereby causing the base portion 61, the housing connection port 62, and the external connector. It has a role of suppressing the occurrence of welds in the connecting portion 63. The weld refers to a linear pattern generated at the confluence of resin flows.

The turbulent flow generation convex portion 88 is formed from substantially the center of the main body portion 84 in the longitudinal direction to the rising wall 87. The turbulent flow generation convex portion 88 is formed in a substantially T shape when viewed from the axial direction (when viewed from the normal direction of the flat surface 84a). That is, the turbulent flow generating convex portion 88 extends from the rising wall 87 toward the external connector connection port fitting portion 86 side in the Y direction along the Y direction, and the external connector connection of the Y direction extending portion 88a. The X-direction extending portion 88b extending along the X direction from the end portion on the mouth fitting portion 86 side is integrally molded.

The housing connection port fitting portion 85 is integrally formed on the surface 87a of the rising wall 87 opposite to the turbulent flow generating convex portion 88. The housing connection port fitting portion 85 is formed in a substantially columnar shape so that the axial direction is along the Y direction. The outer diameter of the housing connection port fitting portion 85 is the same as the inner diameter of the housing connection port 62.

The external connector connection port fitting portion 86 is formed so as to correspond to the shape of the external connector connection port 77. The external connector connection port fitting portion 86 is formed so as to slightly protrude from the flat surface 84a of the main body portion 84. The external connector connection port fitting portion 86 is embedded in the root of the external connector connection port 77.

Here, in the premolded body 82, a breathing path 90 is formed between the housing connection port fitting portion 85, the main body portion 84, and the external connector connection port fitting portion 86. The breathing path 90 is opened to the end surface 85a of the housing connection port fitting portion 85 and is opened to the end surface 86a of the external connector connection port fitting portion 86. The breathing path 90 communicates between the inside of the control unit 40 (the inside of the motor device 2) and the outside via the connector unit 60. This makes it possible to prevent the pressure inside the electric pump 1 from increasing.

The connector-side terminal 83 is provided at the terminal body 91 that is bent and extended over the entire longitudinal direction (Y direction) of the premolded body 82, and at the end of the terminal body 91 on the housing connection port fitting portion 85 side. The connector-side tongue piece portion (corresponding to the tongue piece portion in the claim) 92 and the external connection tongue piece portion 93 provided at the end of the terminal body 91 on the external connector connection port fitting portion 86 side are integrally molded. It was done.
Each terminal body 91 is arranged so that a part of the terminal body 91 is exposed from the opening 89 of the body 84. Each terminal body 91 has a cut portion 94a formed at a portion exposed from the opening 89 of the main body 84. The cutting portion 94a is formed by cutting the connecting portion 94 to which each terminal body 91 is connected. The cut portion 94a is formed after inserting and molding a plurality of connector-side terminals 83 into the premolded body 82 (details will be described later).

The end of the terminal body 91 on the housing connection port fitting portion 85 side protrudes from the end surface 85a of the housing connection port fitting portion 85 along the Y direction. A connector-side tongue piece portion (corresponding to the tongue piece portion in the claims) 92 is bent and extended at the end of the protruding terminal body 91. The connector-side tongue piece portion 92 is bent and extended along the axial direction from the end of the terminal body 91, and is slightly tilted toward the tip toward the terminal body 91. The surface of the connector-side tongue piece portion 92 on the control unit 40 side is a connector-side connection surface 92a that comes into contact with the housing-side connection surface 47a of the housing-side tongue piece portion 47.

The end of the terminal body 91 on the external connector connection port fitting portion 86 side is located at the root of the external connector connection port fitting portion 86. An external connection tongue piece portion 93 is bent and extended along the axial direction at the end of the terminal body 91 on the external connector connection port fitting portion 86 side. The tip of the tongue piece portion 93 for external connection is projected and exposed in the external connector connection port 77. External power is supplied to the connector portion 60 by connecting the tongue piece portion 93 for external connection and the terminal of an external connector (not shown).

FIG. 7 is a cross-sectional view taken along the line AA of FIG.
As shown in FIGS. 1 and 7, in the connector portion 60, the leg-side contact surface 75a of the flanged collar 74 provided on the leg portions 68a and 68b is brought into contact with the side surface 11d of the housing 11 by the bolt 70. It is fastened and fixed to the housing 11. Specifically, a bolt 70 is inserted into the flanged collar 74 from the side of the fixing portion 72 opposite to the housing 11, and the bolt 70 is formed on the side surface 11d of the housing 11 by a female screw portion (in the fixing hole in the claim). Equivalent) 11e (see FIG. 3) screwed. As a result, the connector portion 60 is fastened and fixed to the housing 11. Of the side surface 11d of the housing 11, the portion where the female screw portion 11e is formed and the leg-side contact surface 75a of the connector portion 60 is in contact with the housing 11 is referred to as the housing-side contact surface 11f.

In a state where the connector portion 60 is fastened and fixed to the housing 11, the two legs 68a and 68b of the connector portion 60 are arranged on both sides of the base portion 51 formed in the housing 11 in the X direction. The length L1 between the positioning ribs 73 formed on the two legs 68a and 68b is the length L2 between the two flat surfaces 51a formed on the base portion 51 of the housing 11 (see FIG. 7). Since it is the same as or slightly larger than the above, the positioning ribs 73 of the legs 68a and 68b are brought into contact with the flat surface 51a formed on the base portion 51 of the housing 11. As a result, the connector portion 60 is positioned with respect to the housing 11.

In a state where the connector portion 60 is fastened and fixed to the housing 11, the housing side connection surface 47a provided on the housing side terminal 45 of the housing 11 and the connector side connection surface 92a provided on the connector side terminal 83 of the connector portion 60. Is abutted.
Here, the housing-side tongue piece portion 47 having the housing-side connecting surface 47a protrudes from the resin molded body 46 in the axial direction. On the other hand, the connector-side tongue piece portion 92 having the connector-side connecting surface 92a is slightly tilted toward the tip and away from the terminal body 91.

Further, in a state where the connector portion 60 is fastened and fixed to the housing 11, the housing of the connector portion 60 is attached to the housing side inlay portion 54 of the stepped cylindrical inner peripheral surface 53 formed in the connector connection port 48 of the housing 11. Of the connection ports 62, the connector-side inlay portion 67 is fitted. At the same time, the connector side seal portion 66 is positioned at a position corresponding to the housing side seal portion 55.

Here, the connector side seal portion 66 and the connector side inlay portion 67 constituting the housing connection port 62 are formed coaxially and on the same surface. Further, the outer diameter of the housing connection port 62 is the same as or slightly smaller than the inner diameter of the housing-side inro portion 54. Therefore, while the connector-side in-row portion 67 is fitted to the housing-side in-row portion 54, there is a gap between the housing-side seal portion 55 and the connector-side seal portion 66 by the amount of the step portion 56 of the connector connection port 48. Is formed. This gap functions as a space for attaching the O-ring 57. As a result, the O-ring 57 can be attached between the housing-side seal portion 55 and the connector-side seal portion 66, and the sealability between the connector connection port 48 and the housing connection port 62 is ensured.

Further, in a state where the connector portion 60 is fastened and fixed to the housing 11, the leg portion side contact surfaces 75a of the leg portions 68a and 68b of the connector portion 60 and the tip of the connector side inlay portion 67 (the connector side of the connector side inlay portion 67). The distance between the end on the side opposite to the seal 66) is La, and the distance between the housing-side contact surface 11f in the housing 11 and the tip of the connector connection port 48 (the tip of the housing-side seal 55). When Lb, the distances La and Lb are
La <Lb ・ ・ ・ (1)
Meet.

(How to mold the connector)
Next, a method of molding the connector portion 60 will be described with reference to FIG.
FIG. 8 is an explanatory view of a molding method of the connector portion 60.
When molding the connector portion 60, first, the connector side terminal unit 80 is molded. At this time, a mold (not shown) for molding the connector side terminal unit 80 is used. A plurality of connector-side terminals 83 are set in this mold, and a resin is poured into the mold to form a premolded body 82.

Here, at the stage of setting a plurality of connector-side terminals 83 in a mold (not shown), the plurality of connector-side terminals 83 are connected by a connecting portion 94 (see FIG. 6). Therefore, each connector-side terminal 83 does not vary in the mold (not shown), and a plurality of connector-side terminals 83 can be easily set in the mold.
After molding the premolded body 82, the connecting portion 94 exposed through the opening 89 of the premolded body 82 is cut using a tool (not shown). As a result, the cutting portion 94a is formed in the connecting portion 94. By forming the cutting portion 94a, each connector side terminal 83 is divided. Therefore, the terminals 83 on each connector side are held by the premolded body 82 in a state of being insulated from each other.

After molding the connector-side terminal unit 80, the connector-side terminal unit 80 is set in the mold 120 as shown in FIG.
Here, the mold 120 includes an upper mold 121, a lower mold 122, and a slide core 123 provided between the upper mold 121 and the lower mold 122. The upper die 121 and the lower die 122 are provided with nests 121a and 122a, respectively. The outer peripheral surface of the base portion 61 of the connector portion 60 is formed by these nests 121a and 122a. Further, the external connector connecting portion 63 is formed by the upper die 121 and the lower die 122.

The slide core 123 forms the housing connection port 62. That is, the parting line of the mold 120 is not set on the outer peripheral surface of the housing connection port 62 (the connector side seal portion 66 and the connector side inlay portion 67). The parting line PL of the slide core 123 and the upper die 121 and the lower die 122 is set on the end surface 61b of the base portion 61. By pouring the resin into the mold 120, the base portion 61, the housing connection port 62, and the external connector connection portion 63 are formed. As a result, the molding of the connector portion 60 is completed.

Here, when molding the connector portion 60, since the connector side terminal unit 80 is set in the mold 120, it is not necessary to position and support the plurality of connector side terminals 83 by the mold 120. Therefore, it is possible to set the parting line PL on the end surface 61b of the base portion 61 without setting the parting line of the mold 120 on the outer peripheral surface of the housing connection port 62.
Further, the connector side terminal unit 80 is formed with a turbulent flow generation convex portion 88. When the resin flows into the mold 120, the direction of flow of the resin that has reached the turbulent flow generation convex portion 88 is disturbed. Therefore, it is difficult for welds to be formed in the connector portion 60.

Further, the connector portion 60 is formed with a reinforcing rib 78 so as to straddle the neck portion 76 and the end surface 65a of the diameter reduction portion 65. The reinforcing rib 78 is formed in a substantially triangular shape so as to taper toward the external connector connection port 77 when viewed from the X direction. Therefore, even if the external connector connecting portion 63 has a substantially L-shaped cross section, the resin flow does not deteriorate. The resin spreads smoothly and evenly over the entire connector portion 60. The gate position P (see FIG. 4) of the mold 120 is the neck portion 76, the external connector connection port 77, and the connection portion, and is on the flat surface 76a side of the neck portion 76.

(Assembly of connector part)
Next, assembling the connector portion 60 to the housing 11 will be described.
First, the legs 68a and 68b of the connector portion 60 are directed to the connector connection port 48 of the housing 11. Then, the connector portion 60 is brought closer to the housing 11 so that the base portion 51 of the housing 11 is fitted between the legs portions 68a and 68b. At this time, the distance La between the leg-side contact surface 75a of the legs 68a and 68b and the tip of the connector-side inlay portion 67, and the housing-side contact surface 11f of the housing 11 and the tip of the connector connection port 48. The distance Lb between them satisfies the above equation (1). Therefore, the housing 11 is between the legs 68a and 68b of the connector portion 60 before the housing connection port 62 of the connector portion 60 is fitted to the cylindrical portion 52 (stepped cylindrical inner peripheral surface 53) of the housing 11. The base portion 51 of is fitted.

Then, the positioning ribs 73 of the legs 68a and 68b are brought into contact with the flat surface 51a of the base portion 51, and the orientation of the connector portion 60 with respect to the housing 11 is determined. When the connector portion 60 is pushed into the side surface 11d of the housing 11 in this state, the housing connection port 62 of the connector portion 60 is smoothly fitted to the cylindrical portion 52 of the housing 11. Further, when the connector portion 60 is pushed into the side surface 11d of the housing 11, the leg-side contact surfaces 75a of the legs 68a and 68b are brought into contact with the housing-side contact surface 11f of the housing 11. Then, the housing-side connection surface 47a of the housing-side terminal 45 and the connector-side connection surface 92a of the connector-side terminal 83 are brought into contact with each other, and these housing-side terminals 45 and the connector-side terminal 83 are connected.

FIG. 9 is an explanatory diagram showing a process until the housing side terminal 45 and the connector side terminal 83 are connected.
Here, the housing-side tongue piece portion 47 having the housing-side connecting surface 47a protrudes from the resin molded body 46 in the axial direction. On the other hand, the connector-side tongue piece portion 92 having the connector-side connecting surface 92a is slightly tilted toward the tip and away from the terminal body 91.

Therefore, as shown in FIG. 9, in the process in which the housing-side terminal 45 approaches the connector-side terminal 83 (see arrow Y1), the housing-side connection surface 47a and the connector-side connection surface 92a become housing-side terminals. There is an angle between the housing side connection surface 47a and the connector side connection surface 92a so that the 45 and the terminal body 91 side are opened. When the housing-side connecting surface 47a and the connector-side connecting surface 92a come into contact with each other, the tips of the tongue pieces 47 and 92 come into contact with each other first. Then, the degree of proximity of the tongue pieces 47 and 92 changes due to a manufacturing error between the housing-side terminal unit 44 and the connector-side terminal unit 80. The area in which the housing-side connecting surface 47a and the connector-side connecting surface 92a are in contact with each other changes depending on the degree of approach. That is, when connecting the housing-side terminal 45 and the connector-side terminal 83, a manufacturing error between the housing-side terminal unit 44 and the connector-side terminal unit 80 is allowed by the amount of inclination of the connector-side tongue piece portion 92.

After the leg-side contact surfaces 75a of the legs 68a and 68b are in contact with the housing-side contact surface 11f of the housing 11, the bolt 70 is inserted into the flanged collar 74 from the side opposite to the housing 11 of the fixing portion 72. To do. Then, the bolt 70 is screwed into the female screw portion 11e (see FIG. 3) formed on the side surface 11d of the housing 11. As a result, the connector portion 60 is fastened and fixed to the housing 11, and the assembly of the connector portion 60 to the housing 11 is completed.

An external connector (not shown) is fitted into the external connector connection port 77 of the connector portion 60 assembled in this way.
Here, the external connector connecting portion 63 having the external connector connecting port 77 is formed in a substantially L-shaped cross section. That is, the neck portion 76 of the external connector connection portion 63 extends along the Y direction, while the external connector connection port 77 extends along the Y direction. Therefore, when an external connector (not shown) is fitted to the external connector connection port 77, a large stress may be applied to the neck portion 76. However, the connector portion 60 is formed with a reinforcing rib 78 so as to straddle the neck portion 76 and the end surface 65a of the diameter reduction portion 65. The reinforcing rib 78 is formed in a substantially triangular shape so as to taper toward the external connector connection port 77 when viewed from the X direction. Therefore, the reinforcing rib 78 prevents the neck portion 76 from being deformed due to the stress applied to the neck portion 76.

(Operation of electric pump)
Next, the operation of the electric pump 1 will be described.
By fitting an external connector (not shown) to the external connector connection unit 63 (external connector connection port 77) of the connector unit 60, electric power is supplied to the motor device 2 via the connector unit 60 and the control unit 40. Then, the motor device 2 is driven and the pump unit 3 is driven. When the pump unit 3 is driven, the oil O is discharged from the discharge port 29 via the suction port 28 and the operating chamber 39.

At this time, a bypass groove 33 that communicates the through hole 25 and the suction oil passage 31 is formed in the end surface 21a of the bracket 21 that constitutes the pump portion 3. The bypass groove 33 guides the oil O between the through hole 25 and the rotating shaft 17 to the suction oil passage 31 before the oil O is boosted. Therefore, by boosting the oil O between the through hole 25 and the rotating shaft 17, it is possible to prevent the oil O from entering the motor device 2 side through the oil seal 27.
In addition, a breathing path 90 is formed in the connector portion 60. Since the breathing path 90 communicates with the inside of the control unit 40 (inside of the motor device 2) and the outside via the connector unit 60, it is possible to prevent the pressure inside the electric pump 1 from increasing.

As described above, in the above-described embodiment, the connector-side seal portion 66 and the connector-side in-row portion 67 constituting the housing connection port 62 are formed coaxially and on the same surface. Further, the outer diameter of the housing connection port 62 is the same as or slightly smaller than the inner diameter of the housing-side inro portion 54. Therefore, while the connector-side in-row portion 67 is fitted to the housing-side in-row portion 54, there is a gap between the housing-side seal portion 55 and the connector-side seal portion 66 by the amount of the step portion 56 of the connector connection port 48. Is formed. This gap functions as a space for attaching the O-ring 57. As a result, the O-ring 57 can be attached between the housing-side seal portion 55 and the connector-side seal portion 66, and the sealability between the connector connection port 48 and the housing connection port 62 is ensured. Further, since the connector side seal portion 66 and the connector side inlay portion 67 are formed coaxially and on the same surface, the connector connection port 48 and the housing connection port 62 are arranged in a space-saving manner while ensuring the sealing property. it can.

Further, the outer peripheral surface of the housing connection port 62 is fitted to the stepped cylindrical inner peripheral surface 53 of the connector connection port 48. With this configuration, the configuration of the housing connection port 62 can be simplified as compared with the case where the housing connection port 62 is fitted on the outer peripheral surface of the connector connection port 48.
Further, the connector portion 60 has legs 68a and 68b protruding from both sides to the housing 11 side with the housing connection port 62 interposed therebetween. The leg-side contact surface 75a of the legs 68a and 68b and the housing-side contact surface 11f of the housing 11 are brought into contact with each other, and the bolt 70 is screwed into the female screw portion 11e of the housing 11 to bring the housing 11 into contact with the housing 11. The connector portion 60 is fastened and fixed. Therefore, the connector portion 60 is stably arranged in the housing 11, and the connector portion 60 is firmly fixed to the housing 11.

At this time, the housing connection port 62 is fitted into the connector connection port 48. The housing-side seal portion 55, which is sealed between the connector connection port 48 and the housing connection port 62 by the O-ring 57, is arranged on the tip end side of the connector connection port 48. Therefore, the O-ring 57 can be easily assembled from the tip side of the connector connection port 48, and the assembling property of the connector portion 60 can be improved. Further, since the O-ring 57 is arranged on the tip side of the connector connection port 48, dust is generated between the housing 11 and the connector portion 60 as compared with the case where the O-ring 57 is arranged on the root side of the connector connection port 48. Etc. can be prevented as much as possible from accumulating.

Further, the distance La between the leg-side contact surface 75a of the legs 68a and 68b and the tip of the connector-side inlay portion 67, and between the housing-side contact surface 11f of the housing 11 and the tip of the connector connection port 48. The distance Lb of is satisfied by the above equation (1). Therefore, the housing 11 is between the legs 68a and 68b of the connector portion 60 before the housing connection port 62 of the connector portion 60 is fitted to the cylindrical portion 52 (stepped cylindrical inner peripheral surface 53) of the housing 11. The base portion 51 of the above can be fitted. That is, just before the housing connection port 62 is fitted into the cylindrical portion 52 of the housing 11, the centering of the cylindrical portion 52 and the housing connection port 62 is completed. Therefore, the housing connection port 62 can be smoothly fitted to the cylindrical portion 52, and the O-ring 57 can be prevented from being damaged when the connector portion 60 is assembled. Therefore, a highly reliable electric pump 1 can be provided.

Further, a flat surface 51a is formed on the base portion 51 of the connector connection port 48. Positioning ribs 73 that come into contact with the flat surface 51a are formed on the legs 68a and 68b of the connector portion 60. With the flat surface 51a and the positioning rib 73, the orientation of the connector portion 60 with respect to the housing 11 can be reliably determined, and the assembling property of the connector portion 60 can be more reliably improved.

Further, the external connector connection portion 63 of the connector portion 60 includes a flat plate-shaped neck portion 76 along the X direction and the Y direction, and an external connector connection port 77 bent and extended along the axial direction from the neck portion 76. There is. As described above, since the external connector connection port 77 is provided in the direction orthogonal to the extension direction of the housing side terminal unit 44 of the housing 11, the connection direction of the external connector (not shown) is extended to the housing side terminal unit 44. It can be set in a direction different from the outgoing direction. That is, the degree of freedom in setting the connection direction of the external connector can be increased.

Further, the reinforcing rib 78 is formed so as to straddle the neck portion 76 and the end surface 65a of the reduced diameter portion 65. The reinforcing rib 78 is formed in a substantially triangular shape so as to taper toward the external connector connection port 77 when viewed from the X direction. Therefore, even if the external connector connecting portion 63 has a substantially L-shaped cross section, the resin flow does not deteriorate and the moldability of the connector portion 60 can be improved.
When an external connector (not shown) is fitted to the external connector connection port 77, a large stress may be applied to the neck portion 76. However, the reinforcing rib 78 can surely prevent the neck portion 76 from being deformed due to the stress applied to the neck portion 76.

Further, the connector-side tongue piece portion 92 of the connector portion 60 is bent and extended along the axial direction from the end portion of the terminal main body 91, and is slightly tilted toward the tip in the direction away from the terminal main body 91. ing. That is, the housing-side connection surface 47a and the connector-side connection surface 92a have an angle between the housing-side connection surface 47a and the connector-side connection surface 92a so that the housing-side terminal 45 and the terminal body 91 side are opened. Therefore, when connecting the housing side terminal 45 and the connector side terminal 83, a manufacturing error between the housing side terminal unit 44 and the connector side terminal unit 80 can be tolerated by the amount of inclination of the connector side tongue piece portion 92. Therefore, the housing-side terminal unit 44 and the connector-side terminal unit 80 can be reliably connected.

Further, the connector portion 60 includes a connector side terminal unit 80. Therefore, the premolded body 82 allows the plurality of connector-side terminals 83 to be integrated in advance. As a result, when molding the base portion 61, the housing connection port 62, and the external connector connection portion 63, it is not necessary to position a plurality of connector-side terminals 83 in the mold 120, and the moldability of the connector portion 60 can be improved. ..
Further, since it is not necessary to position a plurality of connector-side terminals 83 in the mold 120, the parting line of the mold 120 is not set on the outer peripheral surface of the housing connection port 62, and the end surface 61b of the base portion 61 is partyed. It becomes possible to set the parting line PL. Therefore, the outer peripheral surface of the housing connection port 62 can be molded with high accuracy, and the function of the O-ring 57 can be fully exhibited.

Further, the premolded body 82 is formed with a turbulent flow generating convex portion 88. The turbulent flow generation convex portion 88 is formed in a substantially T shape when viewed from the axial direction (when viewed from the normal direction of the flat surface 84a). When the resin is poured into the mold 120 by the turbulent flow generating convex portion 88, the flow of the resin reaching the turbulent flow generating convex portion 88 is disturbed and welded to the base portion 61, the housing connection port 62, and the external connector connecting portion 63. Can be prevented from being formed. Therefore, the quality of the connector portion 60 can be improved.

In addition, a breathing path 90 is formed in the connector portion 60. Since the breathing path 90 communicates with the inside of the control unit 40 (inside of the motor device 2) and the outside via the connector unit 60, it is possible to prevent the pressure inside the electric pump 1 from increasing.

Further, a bypass groove 33 for communicating the through hole 25 and the suction oil passage 31 is formed in the end surface 21a of the bracket 21 constituting the pump portion 3. The bypass groove 33 guides the oil O between the through hole 25 and the rotating shaft 17 to the suction oil passage 31. That is, this oil O is guided to the suction oil passage 31 before the oil O between the through hole 25 and the rotating shaft 17 is boosted. Therefore, by boosting the oil O between the through hole 25 and the rotating shaft 17, it is possible to prevent the oil O from invading the motor device 2 side through the oil seal 27.

The present invention is not limited to the above-described embodiment, and includes various modifications of the above-described embodiment without departing from the spirit of the present invention.
For example, in the above-described embodiment, the case where the electric pump 1 is for supplying oil to a hydraulic device such as a mission mounted on an automobile (not shown) has been described. However, the electric pump 1 is not limited to that for automobiles, and can be used for supplying oil to various hydraulic devices.

Further, in the above-described embodiment, the case where the electric pump 1 is provided with the control device 5 having the housing 11 and the connector portion 60 has been described. However, the present invention is not limited to this, and the configuration of the housing 11 and the connector portion 60 can be adopted for driving and controlling various electric motors.
Further, in the above-described embodiment, the case where the connector portion 60 is integrally formed with three reinforcing ribs 78 so as to straddle the neck portion 76 and the end surface 65a of the reduced diameter portion 65 has been described. However, the present invention is not limited to this, and it is sufficient that at least one reinforcing rib 78 is formed in the connector portion 60.

Further, in the above-described embodiment, the case where the two leg portions 68a and 68b are integrally molded in the connector portion 60 has been described. However, the present invention is not limited to this, and the connector portion 60 may be provided with at least one leg portion. Further, two or more legs may be provided. The base portion 51 of the housing 11 may form a flat surface 51a according to the number of legs.
Further, in the above-described embodiment, the case where the two positioning ribs 73 along the Y direction are formed so as to protrude from the legs 68a and 68b has been described. However, the present invention is not limited to this, as long as at least one positioning rib 73 is projected on the legs 68a and 68b, and two or more positioning ribs 73 may be projected.

Further, in the above-described embodiment, the case where the outer peripheral surface of the housing connection port 62 is fitted to the inner peripheral surface (stepped cylindrical inner peripheral surface 53) of the connector connection port 48 has been described. However, the present invention is not limited to this, and the inner peripheral surface of the housing connection port 62 may be fitted to the outer peripheral surface of the connector connection port 48. In this case, the configuration of the stepped cylindrical inner peripheral surface 53 of the connector connection port 48 is formed on the outer peripheral surface of the connector connection port 48. That is, the housing-side seal portion 55 is formed to have a smaller diameter than the housing-side in-row portion 54 via the stepped portion 56.

Further, in the above-described embodiment, the connector-side tongue piece portion 92 of the connector-side terminal unit 80 is bent and extended along the axial direction from the end of the terminal body 91, and is separated from the terminal body 91 toward the tip. The case of being slightly tilted in the direction of the connector was explained. However, the present invention is not limited to this, and the housing-side tongue piece portion 47 may be tilted toward the tip in a direction away from the housing-side terminal 45. Further, both the connector side tongue piece portion 92 and the housing side tongue piece portion 47 may be tilted at 92 and 47. In other words, the housing side connection surface 47a and the connector side connection surface 92a have an angle between the housing side connection surface 47a and the connector side connection surface 92a so that the housing side terminal 45 and the terminal body 91 side are opened. Just do it.

Further, in the above-described embodiment, the case where the upper mold 121 and the lower mold 122 of the mold 120 are provided with nests 121a and 122a, respectively, has been described. A case where the outer peripheral surface of the base portion 61 of the connector portion 60 is formed by these nests 121a and 122a has been described. However, the present invention is not limited to this, and the outer peripheral surface of the base portion 61 may be directly formed by the upper die 121 and the lower die 122.

Further, in the above-described embodiment, the case where the O-ring 57 is used in order to secure the sealing property between the connector connection port 48 and the connector portion 60 has been described. However, it is sufficient that the sealing property between the connector connection port 48 and the connector portion 60 can be ensured. For example, an oil seal may be provided instead of the O-ring 57.
Further, in the above-described embodiment, the case where the connector portion 60 is fastened and fixed to the housing 11 of the control portion 40 by the bolt 70 has been described. However, the present invention is not limited to this, and any member may be used as long as the connector portion 60 can be fixed to the housing 11 of the control portion 40. For example, rivets or the like may be used instead of the bolt 70. In this case, a hole (recess) for fixing the rivet is formed in the housing 11 instead of the female screw portion 11e.

1 ... Electric pump, 2 ... Motor device (electric motor), 3 ... Pump part, 4 ... Motor part, 4a ... Power supply terminal, 11 ... Housing, 11e ... Female screw part (fixing hole), 11f ... Housing side contact surface ( 1st surface), 45 ... Housing side terminal, 47a ... Housing side connection surface, 48 ... Connector connection port, 51 ... Base part, 51a ... Flat surface, 52 ... Cylindrical part, 53 ... Stepped cylindrical inner peripheral surface, 54 ... Housing side inlay part, 55 ... Housing side seal part, 56 ... Step part, 57 ... O ring (seal member), 60 ... Connector part (connector), 61 ... Base part, 61b ... End face (second surface), 62 ... Housing connection port, 63 ... External connector connection part, 66 ... Connector side seal part, 67 ... Connector side inlay part, 68a, 68b ... Leg part, 70 ... Bolt (fixing member), 72c ... Through hole, 73 ... Positioning rib, 76 ... Neck, 77 ... External connector connection port, 78 ... Reinforcing rib, 82 ... Premolded body, 83 ... Connector side terminal, 84 ... Main body, 84a ... Flat surface (one side), 88 ... Turbulent flow generation convex part, 91 ... Terminal body, 92 ... Connector side tongue piece (tongue piece), 92a ... Connector side connection surface, PL ... Parting line

Claims (11)

A base portion and a connector having a tubular housing connection port protruding from the base portion,
A housing having a tubular connector connection port to which the housing connection port is fitted, and a housing
A sealing member that seals between the housing connection port and the connector connection port,
With
The housing connection port is
Connector side inro part and
A connector-side seal portion formed coaxially with the connector-side inro portion and on the same surface,
Have,
The connector connection port is
A housing-side inro portion that is fitted so as to come into contact with the connector-side inro portion,
A housing-side seal portion coaxially with the housing-side in-row portion and formed via a step portion with the housing-side in-row portion and facing the connector-side seal portion with a predetermined gap in the radial direction.
Have,
An electric motor characterized in that the seal member is arranged between the connector-side seal portion and the housing-side seal portion. The housing connection port is fitted inside the connector connection port in the radial direction.
The housing-side seal portion is formed to have a larger diameter with respect to the housing-side in-row portion via the step portion.
The electric motor according to claim 1, wherein the seal member is arranged between the outer surface of the connector-side seal portion and the inner surface of the housing-side seal portion. The connector is formed so as to extend from the outer side of the outer surface of the housing connection port in the base portion, and has at least one leg portion for fixing the connector to the housing.
The legs
The leg-side contact surface that comes into contact with the housing and
A through hole formed so as to penetrate the leg-side contact surface and through which the fixing member is inserted,
Have,
The housing is
The housing-side contact surface with which the leg-side contact surface is in contact,
A fixing hole formed on the housing-side contact surface and to which the fixing member is fixed,
Have,
The connector connection port is projected from the housing-side contact surface, and the housing-side seal portion is arranged on the side opposite to the housing-side contact surface with the housing-side in-row portion interposed therebetween. The electric motor according to claim 2. La is the distance between the leg-side contact surface and the end of the connector-side inro portion on the opposite side of the connector-side seal portion.
When the distance between the housing-side contact surface and the tip of the connector connection port is Lb,
The distances La and Lb are
La <Lb
The electric motor according to claim 3, wherein the electric motor satisfies the above. The leg has at least one positioning rib projecting on the inner surface facing the connector connection port in a radial direction orthogonal to the axial direction of the connector connection port.
The connector connection port has a flat surface on an outer surface facing the inner side surface of the leg portion in the radial direction.
The electric motor according to claim 3 or 4, wherein the positioning rib is in contact with the flat surface. The connector has an external connector connection to which an external connector is connected.
The external connector connection portion is
A neck portion extending coaxially from the base portion to the housing connection port,
An external connector connection port extending from the neck portion in a direction intersecting the axial direction of the housing connection port and to which the external connector is connected.
Reinforcing ribs formed so as to straddle the neck portion and the base portion,
The electric motor according to any one of claims 1 to 5, wherein the electric motor is provided. The housing connection port includes a connector-side terminal having a connector-side connection surface that intersects the axial direction of the housing connection port and the connector connection port.
The connector connection port comprises a housing-side terminal having a housing-side connection surface that intersects the axial direction and is in contact with the connector-side connection surface.
At least one of the connector-side terminal and the housing-side terminal
The terminal body along the axial direction and
A tongue piece that bends and extends from the tip of the terminal body and tilts away from the terminal body toward the tip.
Have,
The tongue piece portion has either the connector-side connecting surface or the housing-side connecting surface.
The connector-side connection surface and the housing-side connection surface are arranged at an angle between the connector-side connection surface and the housing-side connection surface so that the terminal body side opens. The electric motor according to any one of claims 1 to 6. The connector is made of resin and
The connector is
Connector side terminal and
A premolded body in which at least a part of the connector side terminal is embedded, and
The base portion in which the premolded body is embedded and the connector side terminal is exposed, and
The electric motor according to any one of claims 1 to 7, wherein the electric motor is provided. The premolded body is
A plate-shaped main body in which the connector side terminal is embedded and
A T-shaped turbulent flow generation convex portion that protrudes from one surface of the main body and is viewed from the normal direction of the one surface.
The electric motor according to claim 8, wherein the electric motor has. The electric motor according to any one of claims 1 to 9.
A pump unit connected to the electric motor and driven by the electric motor,
With
The electric motor has a motor unit that is housed in the housing and is provided with a power supply terminal for supplying power through the housing connection port.
An electric pump characterized in that the motor unit and the pump unit are connected to each other. A base portion having a second surface facing the first surface of the housing and
A tubular housing connection port protruding from the second surface of the base portion,
The premolded body embedded in the base portion and
A connector-side terminal embedded in the premolded body and partially exposed to the housing connection port.
With
A method for manufacturing a connector of a connector in which an outer surface of the housing connection port is fitted to an inner surface of a tubular connector connection port formed on the first surface of the housing.
The premolded body in which the connector side terminal is embedded is set in a mold, and the base portion is molded so that the second surface of the base portion serves as a parting line of the mold. Connector manufacturing method.

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