WO2019044482A1

WO2019044482A1 - Electric pump

Info

Publication number: WO2019044482A1
Application number: PCT/JP2018/030236
Authority: WO
Inventors: 浩一朗赤塚; 義之牧
Original assignee: Ｋｙｂ株式会社
Priority date: 2017-08-31
Filing date: 2018-08-13
Publication date: 2019-03-07
Also published as: JP2019044677A

Abstract

An electric pump (100) comprises a motor mechanism (1) provided to one-end side of a rotating shaft (4), a pump mechanism (30) provided to the other-end side of the rotating shaft (4), and a single housing (3) that accommodates the motor mechanism (1) and the pump mechanism (30). The single housing (3) is provided with a plurality of attachment parts (130) attached to an external unit (190), the attachment parts (130) being set apart from each other along the axial direction of the rotating shaft (4).

Description

Electric pump

The present invention relates to an electric pump.

JP2016-50574A discloses an electric vane pump driven by the power of an electric motor. In the electric vane pump described in JP2016-50574A, the motor housing and the pump housing are fastened by bolts.

The electric vane pump is provided with a plurality of attachment portions for attachment to the external unit. However, when mounting parts are provided on each of the motor housing and the pump housing, if the assembling error between both housings is large, the alignment surface of the mounting parts may be shifted, and the electric vane pump may not be properly mounted on the external unit. is there.

On the other hand, when a plurality of attachment parts are provided only in either the motor housing or the pump housing, the distance between the attachment parts in the axial direction of the motor shaft can not be sufficiently ensured, and the vibration resistance is lowered. A problem arises.

An object of the present invention is to provide an electric pump that can be suitably attached to an external unit and has high vibration resistance.

According to an aspect of the present invention, there is provided an electric pump comprising: a motor mechanism provided on one end side of a rotary shaft; a pump mechanism provided on the other end side of the rotary shaft; the motor mechanism; And a single housing for housing, wherein the single housing is provided with a plurality of mounting portions attached to the external unit at an axial distance from the rotation shaft.

FIG. 1 is a cross-sectional view of an electric vane pump according to an embodiment of the present invention. FIG. 2 is a side view of the electric vane pump according to the embodiment of the present invention, showing a partial cutaway of the internal structure of the pump. FIG. 3A is a view showing an electric vane pump according to a comparative example of the present embodiment. FIG. 3B is a view showing an electric vane pump according to another comparative example of the present embodiment. FIG. 4 is a schematic cross-sectional view of a mounting boss and a port of an electric vane pump according to a first modification of the present embodiment. FIG. 5A is a schematic cross-sectional view of an electric vane pump according to a modification 2-1 of the present embodiment. FIG. 5B is a schematic cross-sectional view of an electric vane pump according to a modification 2-2 of the present embodiment. FIG. 6 is a schematic cross-sectional view of an electric vane pump according to a modified example 2-3 of the present embodiment. FIG. 7 is a schematic cross-sectional view of an electric vane pump according to a third modification of the present embodiment.

An electric vane pump 100 that is an example of an electric pump according to an embodiment of the present invention will be described with reference to the drawings.

The electric vane pump 100 is used, for example, as a hydraulic pressure supply source for supplying hydraulic fluid (working fluid) to hydraulic devices such as a continuously variable transmission mounted on a vehicle and a power steering apparatus.

As shown in FIG. 1, the electric vane pump 100 includes a rotary shaft 4, a motor mechanism 1 provided on one end side (upper side in the drawing) of the rotary shaft 4, and a pump provided on the other end side (lower side in the drawing) A bottomed cylindrical housing 3 for housing the mechanism 30, the motor mechanism 1 and the pump mechanism 30, and a cover 7 for closing the opening of the housing 3 are provided. In the electric vane pump 100, the pump mechanism 30 is driven by the power of the motor mechanism 1 to supply hydraulic oil to a hydraulic device (not shown).

The motor mechanism 1 includes a motor rotor 5 which is a rotor fixed to the rotation shaft 4 and a stator 6 fixed to the inner periphery of the housing 3. The motor rotor 5 has a cylindrical rotor core and a plurality of permanent magnets (not shown). In the rotor core, a plurality of permanent magnets (not shown) are arranged at equal intervals along the circumferential direction. The stator 6 has a cylindrical stator core and a winding attached to the stator core. The motor rotor 5 and the stator 6 are arranged concentrically, and a slight gap exists between them.

The housing 3 and the cover 7 are assembled integrally by fitting an annular inlay portion 4 c formed on the cover 7 to the inner peripheral surface of the housing 3. That is, the housing 3 and the cover 7 have a function as a casing which forms an accommodation space for accommodating the components of the motor mechanism 1 and the pump mechanism 30.

The motor-driven vane pump 100 is arranged so that components constituting the pump mechanism 30 and components constituting the motor mechanism 1 are stacked inside the housing 3. The stacked components are held between the step 7 provided on the bottom of the housing 3 and the cover 7 by attaching the cover 7 to the opening of the housing 3.

The pump mechanism 30 includes a pump rotor 31 connected to the rotation shaft 4, a plurality of vanes 32 provided to be reciprocally movable in the radial direction with respect to the pump rotor 31, and the pump rotor 31. A cam ring 33, a pump cover 8, and a plate member 37 are provided. The cam ring 33 is in sliding contact with the tip of the vane 32 on the cam surface of the inner periphery as it rotates.

The pump cover 8 is a substantially disc-shaped member, and has a function as a partition plate which divides the housing space formed by the housing 3 and the cover 7 into the motor housing space S1 and the pump housing space S2. The pump cover 8 is provided with a through hole through which the rotating shaft 4 passes. In the present specification, in the housing 3, an outer shell forming the motor housing space S1 is a motor housing portion 3a, and an outer shell forming the pump housing space S2 is a pump housing portion 3b.

The rotating shaft 4 is rotatably supported by

bearings

2 a and 2 b provided on the cover 7 and the pump cover 8 respectively. The bearing 2 a is fixed to a circular recess provided to the cover 7, and the bearing 2 b is fixed to a circular recess provided to the pump cover 8. Since the cover 7 and the pump cover 8 are supported by the housing 3, the rotary shaft 4 is indirectly supported by the housing 3.

Inside the cam ring 33, a plurality of pump chambers 34 are defined by the outer peripheral surface of the pump rotor 31, the cam surface of the cam ring 33, and the vanes 32 adjacent in the circumferential direction.

The cam ring 33 is an annular member in which the cam surface has a substantially elliptical shape. The cam surface of the cam ring 33 has two suction areas for expanding the volume of the pump chamber 34 with the rotation of the pump rotor 31, and two discharge areas for reducing the volume of the pump chamber 34 with the rotation of the pump rotor 31. And.

A disk-like pump cover (first side plate) 8 is disposed in contact with one side of the pump rotor 31 and the cam ring 33, and a disk-like plate member (second side plate) 37 is provided on the other side. Are placed in contact. As described above, the pump cover 8 and the plate member 37 are disposed in a state of sandwiching the both side surfaces of the pump rotor 31 and the cam ring 33 and define the pump chamber 34.

The relative rotation of the cam ring 33, the pump cover 8 and the plate member 37 is restricted by two positioning pins (not shown). The cam ring 33, the pump cover 8 and the plate member 37 are fixed so as not to rotate with respect to the housing 3 (not shown).

The pump cover 8 is formed with two suction openings (not shown) cut out in an arc shape. Two suction openings (not shown) open correspondingly to the two suction areas of the cam ring 33 and direct the hydraulic fluid into the pump chamber 34.

Similarly, in the plate member 37, two suction openings (not shown) are formed in a circular arc shape. Two suction openings (not shown) open correspondingly to the two suction areas of the cam ring 33 and direct the hydraulic fluid into the pump chamber 34.

Two discharge openings 61 (see FIG. 2) are formed through the plate member 37. The two discharge openings 61 (see FIG. 2) open corresponding to the discharge area of the cam ring 33 and discharge the hydraulic fluid of the pump chamber 34.

The pump accommodation space S2 has a low pressure chamber (suction space) S21 and a high pressure chamber (discharge space) S22. The low pressure chamber S21 is a donut shaped space formed along the outer periphery of the cam ring 33, and is defined by the pump cover 8, the pump housing 3b, the cam ring 33, and the plate member 37.

The low pressure chamber S <b> 21 communicates with the pump cover 8 and the suction opening (not shown) of the plate member 37 and also communicates with the suction port 91. As shown in FIG. 2, the suction port 91 is a through hole provided in the pump housing 3 b and communicates with the suction oil passage 191 of the external unit 190. The opening peripheral edge portion of the suction port 91 is a mounting surface 90 a that abuts on the mounting surface 195 of the external unit 190. A seal member (not shown) is provided between the mounting surface 90 a of the suction port 91 and the mounting surface 195 of the external unit 190. The suction oil passage 191 of the external unit 190 is connected to an oil tank (not shown) in which the hydraulic oil is stored via a pipe, a valve, and the like.

As shown in FIG. 1, the high pressure chamber S22 is a frusto-conical space formed between the plate member 37 and the bottom of the housing 3, and is defined by the plate member 37 and the pump housing 3b.

The high pressure chamber S22 communicates with the discharge opening 61 (see FIG. 2) of the plate member 37 and also communicates with the discharge port 92. The discharge port 92 is a through hole provided in the pump housing 3 b and communicates with a discharge oil passage (not shown) of the external unit 190. The opening peripheral edge portion of the discharge port 92 is a mounting surface that abuts on the mounting surface 195 of the external unit 190. A seal member (not shown) is provided between the mounting surface of the discharge port 92 and the mounting surface 195 of the external unit 190. A discharge oil passage (not shown) of the external unit 190 is connected to a hydraulic device (not shown) via a pipe, a valve and the like.

As described above, the motor rotor 5 and the stator 6 constituting the motor mechanism 1 are accommodated in the motor accommodation space S1 defined by the cover 7, the motor accommodation portion 3a, and the end surface (upper end surface in the figure) of the pump cover 8. . The pump rotor 31, the cam ring 33, the plate member 37, the pump cover 8 and the like constituting the pump mechanism 30 are defined by the inner peripheral surface of the pump storage portion 3b and the end surface (upper end surface in the figure) of the pump cover 8 It is accommodated in space S2.

In the electric vane pump 100 configured as described above, when the rotary shaft 4 is rotated by the drive of the motor mechanism 1, the pump rotor 31 connected to the rotary shaft 4 is rotated. As a result, hydraulic oil is supplied from the suction oil passage 191 of the external unit 190 to the respective pump chambers 34 inside the cam ring 33 through the suction port 91 and the low pressure chamber S21. The hydraulic oil discharged from each pump chamber 34 is discharged to a discharge oil passage (not shown) of the external unit 190 through the high pressure chamber S22 and the discharge port 92. As described above, each pump chamber 34 in the cam ring 33 supplies and discharges hydraulic oil by expansion and contraction accompanying the rotation of the pump rotor 31.

The electric vane pump 100 is fastened to the external unit 190 by a plurality of bolts 110. The housing 3 is provided with four mounting bosses 130. The mounting boss 130 is provided with a circular through hole 131 through which the bolt 110 is inserted, and has a substantially cylindrical shape. As shown in FIG. 2, the mounting surface (bottom surface) 130 a of the mounting boss 130 is formed in a planar shape and abuts on the mounting surface 195 of the external unit 190.

As shown in FIGS. 1 and 2, the through hole 131 of the mounting boss 130 is provided to be orthogonal to the rotation shaft 4. The bolts 110 attached to the four mounting bosses 130 are arranged parallel to one another. Since the bolts 110 can be attached to all the mounting bosses 130 from one direction, the attachment workability of the electric vane pump 100 to the external unit 190 can be improved.

Hereinafter, among the four mounting bosses 130, the mounting bosses 130 which are a pair of mounting portions provided in the motor housing portion 3a will also be referred to as a motor side boss 130m. Further, mounting bosses 130 which are a pair of mounting portions provided in the pump housing portion 3b will also be referred to as a pump side boss 130p.

A motor-side boss 130m, which is a motor-side mounting portion, and a pump-side boss 130p, which is a pump-side mounting portion, are provided separately in the axial direction of the rotary shaft 4. In the present embodiment, as shown in FIG. 1, the motor side boss 130m is positioned radially outward of the motor rotor 5 and the stator 6, and the pump side boss 130p is positioned radially outward of the high pressure chamber S22. The inter-bolt pitch P, which is the axial distance of the rotary shaft 4 between the motor-side boss 130m and the pump-side boss 130p, is greater than half the total length of the electric vane pump 100.

The external unit 190 is provided with four screw holes 193. An internal thread is formed in the screw hole 193. As shown in FIG. 2, at the tip of the shaft portion 110 a of the bolt 110, an external thread to be screwed to the internal thread of the screw hole 193 is formed. The shaft portion 110 a of the bolt 110 passes through the through hole 131 of the mounting boss 130, and the male screw of the bolt 110 is screwed into the female screw of the screw hole 193 to attach the mounting boss 130 to the external unit 190.

As described above, in the present embodiment, four mounting bosses 130 are provided on the bottomed cylindrical housing 3 which is a single member.

FIG. 3A and FIG. 3B are diagrams showing an electric vane pump 900 according to a comparative example of the present embodiment. As shown in FIGS. 3A and 3B, in the electric vane pump 900, a motor housing 903A for housing a motor mechanism and a pump housing 903B for housing a pump mechanism are separate members, and both housings are fastened by a bolt 990 .

In the comparative example shown in FIG. 3A, mounting bosses 930 for mounting to the external unit 190 are provided on each of the motor housing 903A and the pump housing 903B. The bolt 990 generates an axial force in the axial direction of the rotating shaft to fasten the motor housing 903A and the pump housing 903B.

In the comparative example shown in FIG. 3A, since the motor housing 903A and the pump housing 903B are fastened by the bolt 990, an assembly error accompanying fastening of both housings is relative to the motor side boss 930m and the pump side boss 930p. It may affect.

For example, when the motor housing 903A and the pump housing 903B are assembled with a slight positional offset in the circumferential direction, the mounting surface (bottom surface) of the pump-side boss 930p is the mounting surface (bottom surface) of the motor-side boss 930m. I will lean. For this reason, when the electric vane pump 900 is assembled to the external unit 190, there is a possibility that a load caused by an assembly error may act on each of the motor housing 903A and the pump housing 903B. Therefore, when a positional deviation occurs between the mounting surface of motor-side boss 930m and the mounting surface of pump-side boss 930p, it is necessary to reassemble motor housing 903A and pump housing 903B.

In order to solve such a problem, it is conceivable to provide a plurality of mounting bosses 930 on only one of the motor housing 903A and the pump housing 903B. Temporarily, four mounting bosses 930 are provided on the motor housing 903A.

However, in this case, the pump housing 903B may be slightly lifted due to the high pressure acting in the pump housing 903B. As a result, the sealability between the port of the pump housing 903B and the oil passage of the external unit 190 becomes unstable, which may cause an oil leak.

Therefore, as shown in FIG. 3B, it is conceivable to provide four mounting bosses 930 in the pump housing 903B in which the suction port and the discharge port are provided.

However, in the comparative example shown in FIG. 3B, there arises a problem that the distance between the mounting bosses in the axial direction of the rotation shaft (pitch between bolts) can not be sufficiently secured. In the comparative example shown in FIG. 3B, only the pump housing 903B is fixed to the external unit 190. That is, the distance between the mounting boss 930 and the end (free end) of the motor housing 903A is longer than that of the comparative example shown in FIG. 3A, and the motor housing 903A is supported in a so-called cantilevered state. It will be As a result, the vibration resistance of the electric vane pump 900 is reduced.

On the other hand, in the present embodiment, as shown in FIGS. 1 and 2, four mounting bosses 130 are provided in a single housing 3 for housing the motor mechanism 1 and the pump mechanism 30. The distance between the mounting bosses in the axial direction, that is, the inter-bolt pitch P between the motor-side boss 130m and the pump-side boss 130p can be sufficiently secured. As a result, the vibration resistance of the electric vane pump 100 can be improved. In addition, since four mounting bosses 130 are provided in a single housing 3, as in the comparative example shown in FIG. 3A, there is a problem caused by the configuration in which the motor housing 903A and the pump housing 903B are fastened. It does not occur. That is, since all the mounting bosses 130 are provided in the housing 3 which is a single member, the positions of the respective mounting bosses 130 can be set with high precision, and the motorized vane pump 100 is properly mounted on the external unit 190. Can.

Further, in the present embodiment, since the bolt 990 for connecting the motor housing 903A and the pump housing 903B shown in FIG. 3B is unnecessary, the number of parts can be reduced. Furthermore, in the present embodiment, compared with the comparative example shown in FIG. 3B, the range in which the mounting boss 130 can be arranged is wide, and the degree of freedom of arrangement is high.

As shown in FIG. 2, the attachment surface (bottom surface) 130 a of each attachment boss 130 to the external unit 190 is at least one attachment surface (flat surface of opening periphery) 90 a of the suction port 91 and the discharge port 92 to the external unit 190. It is formed to be flush. In the present embodiment, the attachment surfaces 90a of the suction port 91 and the discharge port 92 with respect to the external unit 190 are set to be flush with each other. That is, in the present embodiment, the mounting surface 130 a of the mounting boss 130 is formed to be flush with both the suction port 91 and the mounting surface 90 a of the discharge port 92.

Since the port mounting surface 90a and the mounting surface 130a of the mounting boss 130 are provided in parallel, fixing the housing 3 to the external unit 190 and attaching the external unit 190 by mounting the mounting boss 130 on the external unit 190 The connection between the oil passage (suction oil passage and discharge oil passage) and the port (suction port 91 and discharge port 92) of the housing 3 can be simultaneously performed. For this reason, the attachment workability of the electric vane pump 100 to the external unit 190 can be improved.

Since the mounting surface 130a of the mounting boss 130 and the mounting surface 90a of the port are set flush, the oil passage (suction oil passage and discharge oil passage) of the external unit 190 and the port (suction port 91 and discharge) of the housing 3 The port 92) can be accurately connected. As a result, the sealability between the external unit 190 and the housing 3 can be improved.

According to the embodiment described above, the following effects can be obtained.

Since a plurality of mounting bosses 130 are provided in a single housing 3 accommodating the motor mechanism 1 and the pump mechanism 30, the positions of the respective mounting bosses 130 are accurately set, and the mounting bosses in the axial direction of the rotary shaft 4 A sufficient distance between them (pitch P between bolts) is secured. As a result, the electric vane pump 100 can be properly attached to the external unit 190, and the vibration resistance of the electric vane pump 100 can be improved.

The following modifications are also within the scope of the present invention, and it is possible to combine the configuration shown in the modification with the configuration described in the above embodiment or to combine the configurations described in the following different modifications. It is.

(Modification 1)
Although the said embodiment demonstrated the example provided so that the attachment surface 130a of the attachment boss 130 may become flush with at least one attachment surface 90a of the suction port 91 and the discharge port 92, this invention is not limited to this . As shown in FIG. 4, the mounting surface 130 a of the mounting boss 130 may not be flush with the port mounting surface 90 a. The mounting surface 130 a of the mounting boss 130 may be provided so as to be parallel to the mounting surface 90 a of at least one of the suction port 91 and the discharge port 92.

Thus, as in the above embodiment, the fixing of the housing 3 to the external unit 190 and the connection between the oil passage of the external unit 190 and the port of the housing 3 can be simultaneously performed. For this reason, the attachment workability of the electric vane pump 100 to the external unit 190 can be improved.

(Modification 2)
The shape and position of the mounting boss 130 are not limited to the above embodiment. The mounting bosses 130 can be formed in various shapes and can be provided at various positions in the housing 3.

(Modification 2-1)
As shown in FIG. 5A, the motor-side boss 130m and the pump-side boss 130p may be disposed on the axially outer side of the motor rotor 5, respectively. That is, the motor rotor 5 is disposed between the motor side boss 130 m and the pump side boss 130 p. Since the housing 3 is supported by the mounting boss 130 on the outer side in the axial direction of the motor rotor 5 which is a rotating body and is a heavy object, the vibration of the electric vane pump 100 can be suppressed more effectively than the above embodiment.

(Modification 2-2)
Although the said embodiment demonstrated the example in which a total of four attachment bosses 130 of a pair of motor side boss | hub 130m and a pair of pump side boss | hub 130p are provided, this invention is not limited to this. For example, as shown in FIG. 5B, the number of mounting bosses 130 may be three, or five or more. It is sufficient if the housing 3 can be fixed to the external unit 190 at at least three locations.

(Modification 2-3)
As shown in FIG. 6, the mounting boss 130 may be provided radially outward of the pump cover 8. Also in such a modification, since the distance between the mounting bosses in the axial direction of the rotation shaft 4 (pitch P between bolts) can be set longer than in the comparative example shown in FIG. 3B, the vibration resistance can be improved. .

(Modification 3)
Although the said embodiment demonstrated the example in which the housing 3 was formed in bottomed cylindrical shape, this invention is not limited to this. For example, as shown in FIG. 7, the present invention may be applied to a cylindrical housing 303 which is open at both ends. Openings at both ends of the housing 303 are closed by a pair of end brackets 307. The

bearings

2 a and 2 b are fixed to the pair of end brackets 307.

(Modification 4)
Although the stator 6 which comprises the motor mechanism 1 demonstrated the example fixed directly to the inner periphery of the housing 3 in the said embodiment, this invention is not limited to this. For example, the stator 6 may further include a cylindrical motor case to which the stator 6 is fixed by press fitting, shrink fitting, or the like. In this case, the motor case is fixed to the housing 3, the pump cover 8 and the like.

(Modification 5)
In the above embodiment, the bolt 110 is inserted into the through hole 131 of the mounting boss 130 and the male screw of the bolt 110 is screwed into the screw hole 193 of the external unit 190 to fasten the electric vane pump 100 to the external unit 190 However, the present invention is not limited thereto. For example, instead of the bolt 110, the electric vane pump 100 may be fastened to the external unit 190 using a fastening member such as a clamp.

(Modification 6)
Although the said embodiment demonstrated the example which provides the bearing 2a in the cover 7, this invention is not limited to this. A bearing holding member may be fixed to the housing 3, and the bearing 2a may be attached to the bearing holding member.

(Modification 7)
Although the external unit 190 provided with the suction oil passage 191 and the discharge oil passage (not shown) has been described as an example in the above embodiment, the present invention is not limited to this. The external unit 190 may include one of the suction oil passage 191 and the discharge oil passage (not shown) and may not have the other. For example, when the external unit 190 includes only a discharge oil passage (not shown), a pipe or the like having the suction oil passage 191 is connected to the suction port 91.

(Modification 8)
Although the said embodiment demonstrated the electric vane pump 100 which supplies hydraulic fluid to hydraulic equipment, such as a continuously variable transmission and a power steering apparatus, as an example, this invention is not limited to this. The present invention can be applied to various electric pumps such as an electric gear pump which is driven by the power of a motor mechanism. The present invention can also be applied to an electric pump that supplies and discharges fluid such as water instead of hydraulic fluid as the hydraulic fluid.

Hereinafter, the configuration, operation, and effects of the embodiment of the present invention will be collectively described.

An electric vane pump 100 as an electric pump includes a motor mechanism 1 provided on one end side of a rotation shaft 4, a pump mechanism 30 provided on the other end side of the rotation shaft 4, a motor mechanism 1 and a pump mechanism 30. Mounting bosses 130 as a plurality of mounting portions attached to the external unit 190 are provided in the axial direction of the rotation shaft 4 so as to be separated from each other in the axial direction of the rotation shaft 4.

In this configuration, since a plurality of mounting bosses 130 are provided in a

single housing

3, 303 for housing the motor mechanism 1 and the pump mechanism 30, the positions of the mounting bosses 130 can be accurately set, and the rotation shaft 4 The distance between the mounting bosses 130 in the axial direction is sufficiently secured. Therefore, the electrically driven vane pump 100 that can be properly attached to the external unit 190 and has high vibration resistance can be provided.

The motorized vane pump 100 includes a motor housing 3a for housing the motor mechanism 1 and a pump housing 3b for housing the pump mechanism 30, and the plurality of mounting bosses 130 are motor housing 3a. And a pump-side boss 130p as a pump-side mounting portion provided in the pump housing 3b.

The motor-side boss 130 m and the pump-side boss 130 p of the motor-driven vane pump 100 are arranged axially outside the motor rotor 5 which is the rotor of the motor mechanism 1.

In these configurations, a sufficient distance between the motor-side boss 130m and the pump-side boss 130p is secured.

In the electric vane pump 100, a plurality of mounting bosses 130 are attached to the external unit 190 by bolts 110 arranged in parallel to one another.

In this configuration, since the bolts 110 can be attached from one direction in the plurality of attachment bosses 130, the attachment workability of the electric vane pump 100 to the external unit 190 can be improved.

In the motorized vane pump 100, a suction port 91 and a discharge port 92 are provided in the

housing

3, 303, and a mounting surface 130a of the mounting boss 130 to the external unit 190 is at least one of the suction port 91 and the discharge port 92 to the external unit 190. It is provided so as to be parallel to the mounting surface 90a.

In this configuration, by attaching the mounting boss 130 to the external unit 190, the

housing

3, 303 is fixed to the external unit 190, and the oil passage (suction oil passage 191, discharge oil passage) of the external unit 190 and the

housing

3, 303 are provided. Connection with the ports (suction port 91, discharge port 92) can be performed simultaneously. For this reason, the attachment workability of the electric vane pump 100 to the external unit 190 can be improved.

The electric vane pump 100 is provided such that the mounting surface 130 a of the mounting boss 130 to the external unit 190 is flush with the mounting surface 90 a of at least one of the suction port 91 and the discharge port 92 to the external unit 190.

In this configuration, the oil passage (suction oil passage 191, discharge oil passage) of the external unit 190 and the ports (suction port 91, discharge port 92) of the

housing

3, 303 can be connected with high accuracy. It is possible to improve the sealability between the housing 3 and the housing 3.

As mentioned above, although the embodiment of the present invention was described, the above-mentioned embodiment showed only a part of application example of the present invention, and in the meaning of limiting the technical scope of the present invention to the concrete composition of the above-mentioned embodiment. Absent.

The present application claims priority based on Japanese Patent Application No. 2017-167727 filed on Aug. 31, 2017 to the Japanese Patent Office, and the entire contents of this application are incorporated herein by reference.

Claims

A motor mechanism provided on one end side of the rotating shaft;
A pump mechanism provided on the other end side of the rotating shaft;
A single housing for housing the motor mechanism and the pump mechanism;
The electric pump, wherein a plurality of mounting portions attached to an external unit are provided in the single housing at intervals in the axial direction of the rotation shaft.
The electric pump according to claim 1, wherein
The housing is
A motor accommodating portion for accommodating the motor mechanism;
And a pump accommodating portion for accommodating the pump mechanism,
The plurality of mounting portions are
A motor side mounting portion provided in the motor housing portion;
An electric pump having a pump side mounting portion provided in the pump housing portion.
The electric pump according to claim 2, wherein
The motor-side mounting portion and the pump-side mounting portion are respectively arranged on the axial direction outer side of a rotor of the motor mechanism.
The electric pump according to claim 1, wherein
The electric pump according to claim 1, wherein the plurality of attachment portions are attached to the external unit by bolts arranged in parallel to each other.
The electric pump according to claim 4, wherein
The housing is provided with a suction port and a discharge port,
The mounting surface of the mounting portion to the external unit is provided so as to be parallel to the mounting surface of at least one of the suction port and the discharge port to the external unit.
The electric pump according to claim 5, wherein
An electric pump provided so that the attachment surface of the attaching part to the external unit is flush with the attachment surface of at least one of the suction port and the discharge port to the external unit.