JP2020153358A - Electric water pump - Google Patents

Abstract

To provide an electric water pump capable of positioning a tip end of a feeding terminal extending from a can at a through-hole of a control substrate, and being easily assembled.SOLUTION: An electric water pump 1 includes a pump casing 10, a rotor 30, a stator 40, a supporting shaft 20, and a can 60 having a recessed portion 62 fitted with the supporting shaft 20. The stator is equipped with a fixed leg portion 52 provided on an insulation bobbin 42b. A feeding terminal 64 is provided with a stress absorbing portion 65 capable of inclining, and the insulation bobbin 42b is provided with a guide portion 54 that is adjacent to the fixed leg portion 52 and guide a tip end of the feeding terminal 64 to a through-hole 71 of an electronic control substrate 70.SELECTED DRAWING: Figure 4

Description

The present invention relates to an electric water pump. The present invention particularly relates to an electric water pump for delivering a fluid such as a vehicle coolant.

Conventionally, an electric water pump is electrically provided with an impeller that is arranged inside a pump casing having a suction port and a discharge port and that rotates integrally with a rotor to send cooling water from the suction port to the discharge port. Water pumps are known (see, for example, Patent Document 1).

The electric water pump of Patent Document 1 is a so-called canned motor type electric water pump, and is equipped with a motor including a control device for controlling energization of the stator and a power supply unit having a power supply terminal for the control device. ing. The motor is provided on the radial outer side of the stator accommodating portion in the housing, and the surface on the stator accommodating portion side is inclined.

Japanese Unexamined Patent Publication No. 6294199

By the way, in a canned motor type electric water pump, when an external connection coupler is provided integrally with the flange of the separation wall that separates the rotor side and the stator side, the flange is on the pump impeller side of the stator, and the control board is opposite to the impeller. Since it is attached to the side, the power supply terminal crosses the stator and the total length becomes long. Since the total length of the power supply terminal becomes long, it becomes difficult to align the tip of the power supply terminal extending from the can with the through hole of the control board during assembly.

An object of the present invention is to provide an electric water pump in which the tip of a power feeding terminal extending from a can can be positioned in a through hole of a control board and can be easily assembled in view of the problems of the prior art.

[1] The electric water pump according to the present invention is
A pump casing with a suction port, a discharge port, and a swirl chamber,
A rotor with a rotor magnet and an impeller housed in the spiral chamber,
With respect to the rotor, a stator arranged outside in the radial direction of rotation,
A support shaft fixed to the pump casing and rotatably supporting the rotor,
The pump casing has a resin partition flange fixed to the pump casing and a recess fitted to the support shaft to partition the spiral chamber, the rotor and the stator, and cover the rotor. An electric water pump with a mounting can and
A power supply coupler having a power supply terminal is provided on the partition flange portion, and a power supply coupler is provided.
The stator includes a stator ring attached to the pump casing via the can, an insulating bobbin provided on the stator ring, and a fixed leg portion provided so as to extend from the insulating bobbin.
The control board that controls the field of the stator is held on the end face of the stator ring via the fixed leg portion, and the control board and the power feeding terminal are electrically connected to each other.
The feeding terminal is provided with a tiltable stress absorbing portion, and the insulating bobbin is provided with a guide portion that guides the tip of the feeding terminal to a through hole of the control board adjacent to the fixed leg portion. It is characterized by being.

According to such a configuration, a power feeding coupler having a power feeding terminal is provided on the partition flange portion, and the feeding terminal extends from the partition flange portion. Since the guide portion is provided on the insulating bobbin and integrally provided in the vicinity of the fixed leg portion for fixing the control board, the control board is positioned on the guide portion simply by fixing the control board to the insulating bobbin. Will be done. As a result, the through hole of the control board faces the hole of the guide portion. Subsequently, when this is connected to the can, which is the separation wall portion, the tip of the power feeding terminal is guided by the guide portion and smoothly passes through the through hole of the control board, so that the assembly becomes easy. In this way, the structure absorbs the relative position deviation (tolerance) between the can on which the coupler is provided and the insulating bobbin of the stator on which the control board is attached, so that the tip of the power supply terminal extending from the can is used as a through hole in the control board. It can be positioned and easily assembled.

[2] Further, in the electric water pump of the present invention,
The stress absorbing portion is separated from the guide portion and is separated from the guide portion.
The guide portion has a length of 50% or more of the total length from the stress absorbing portion to the tip of the feeding terminal, and has a box-shaped portion in which a gap is formed between the inner surface thereof and the feeding terminal, and the box. It is preferable to have a narrow portion formed on the tip end side of the shaped portion and supporting only the tip end portion of the power feeding terminal.

According to such a configuration, since the stress absorbing portion is separated from the guide portion, it is possible to avoid an increase in the size of the guide portion by passing the linear portion of the power feeding terminal through the guide portion. Since the power supply terminal is relatively long, if all the inner holes of the guide portion are formed thin, the misalignment between the tip of the power supply terminal and the through hole becomes large when the can is aligned with the axis of the support shaft. , It becomes difficult to insert the power supply terminal into the guide section. In this respect, in the present invention, since the total length of the guide portion is increased and a gap is formed between the inner surface of the guide portion and the power supply terminal to widen the entrance side of the guide portion, the power supply terminal can be easily inserted. Furthermore, when the motor rotates, the guide and power supply terminals vibrate, but the vibration causes the power supply terminal and the guide to hit each other and make a noise. By forming a gap between the power supply terminal and the guide (clearance). By making it wider), the sounding can also be improved.

[3] Further, in the electric water pump of the present invention,
It is preferable that a rib connecting the fixed leg portion and the guide portion is provided.

According to this configuration, the guide portion is reinforced by connecting the fixed leg portion and the guide portion with ribs, so that it is possible to prevent the positioning from being displaced even when the power feeding terminal is inserted into the guide portion. Further, when the guide portion and the fixed leg portion are injection-molded with the insulating bobbin by resin injection, the so-called hot water circulation is improved, so that the moldability at the time of manufacturing can be improved. Further, since the ribs reduce the resonance of the guide portion due to vibration, noise can be improved.

[4] Further, in the electric water pump of the present invention,
A first fastening flange that is fastened to the partition flange portion by a fastening member is provided on one end side of the stator ring that is in contact with the can.
On the other end side of the stator ring facing the control board, a second fastening flange for supporting the control board is provided via the fixed leg portion, and a second fastening flange is provided.
In a plan view of the stator ring, it is preferable that the first fastening flange is arranged at a position where it does not overlap with the second fastening flange.

According to this configuration, the control board, the second fastening flange, and the first fastening flange do not overlap each other in a plan view (viewed from the axial direction), so that they do not interfere with the insertion of the fastening tool. According to this, after the control board is attached to the stator ring, the stator ring and the can are fixed so that the tip of the power feeding terminal is exposed below the control board through the guide portion. As a result, assembly can be facilitated and productivity can be improved.

(A) is a cross-sectional view showing the structure of the electric water pump according to the present invention. (B) is a perspective view of the electric water pump according to the present invention. It is an exploded perspective view of the electric water pump which concerns on this invention. (A) is an explanatory view of a guide portion, a fixed leg portion and a rib according to the present invention. (B) is explanatory drawing of the 1st fastening flange and the 2nd fastening flange which concerns on this invention. (A) is a perspective view around a power feeding terminal according to the present invention. (B) is an enlarged perspective view of a guide portion according to the present invention. (C) It is sectional drawing of the guide part which concerns on this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the drawing conceptually (typically) shows the electric water pump 1.

As shown in FIGS. 1A to 3A, the electric water pump 1 according to the embodiment of the present invention is, for example, a so-called canned cooling water pump for automobiles, and has a pump casing 10 and a support shaft. A 20, rotor 30, a stator 40, a can 60, a control board 70, and a board housing 80 are provided.

The pump casing 10 includes a fluid suction port 11, a spiral chamber 12 that collects the fluid that enters from the suction port 11 and is discharged from the impeller 31, a discharge port 15 that discharges the fluid from the spiral chamber 12 to the outside, and a can. It includes a plurality of case female screw portions 13 (six in this embodiment) to which the fastening member 91 for fixing 60 and the like is tightened, and a support shaft holding portion 14 into which the support shaft 20 is press-fitted. ..

Further, the pump casing 10 is formed of a die-cast light metal material having conductivity, and the support shaft holding portion 14 is integrally provided on the pump casing 10. The support shaft 20 has a press-fitting portion 21 extending over 40% of the total length and a support main body portion 22 that rotatably supports the rotor 20. In this embodiment, the diameter of the support main body portion 22 is set to be larger than the diameter of the press-fitting portion 21. The washer 23 is passed through such a press-fitting portion 21, and the press-fitting portion 21 is press-fitted into the support shaft holding portion 14 in a state where the washer 23 is sandwiched between the support main body portion 22 and the support shaft holding portion 14. .. As a result, the support shaft 20 is fixed to the pump casing 10.

The rotor 30 includes a slide bearing 32 provided on the support main body 22 of the support shaft 20, an impeller support member 33 provided on the slide bearing 32, an impeller 31 provided on the impeller support member 33, and an impeller 31. The lid portion 31a and the rotor magnet 34 provided on the impeller support member 33 are provided. The impeller 31 is housed in the spiral chamber 12, and the rotor magnet 34 is arranged on the inner diameter side of the stator 40.

The stator 40 is arranged outside the rotor 30 in the radial direction of rotation. The stator 40 is provided on a substantially annular stator ring 41, an insulating bobbins 42a and 42b provided on the inner diameter side of the stator ring 41, an iron core 43 to which the insulating bobbins 42a and 42b are attached, and the iron core 43. A plurality of inwardly facing tooth portions 44 provided, a plurality of yoke portions 45 provided on the iron core 43, an electromagnetic coil 46 wound around insulating bobbins 42a and 42b on the outside of each tooth portion 44, and the like. It is provided with an energizing terminal 47 for energizing the electromagnetic coil 46.

Further, the stator 40 is formed by laminating a magnetic material and connecting a plurality of yoke portions 45 to each inward tooth portion 44 of the iron core 43 from both ends thereof, and a plurality of yoke covering portions 48a, 48b and a plurality of tooth covering portions 49a, 49b. A pair of insulating bobbins 42a and 42b formed in two in the stacking direction are adhered to each other. Further, the stator 40 is formed in an annular shape by winding an electromagnetic coil 46 around the insulating bobbins 42a and 42b and fitting the stator 40 into an annular stator ring 41 having a first fastening flange 41a fixed to the can 60. ing.

Further, the stator 40 is positioned on the axial center of the support shaft 20 via the can 60 by being fitted onto the peripheral surface of the can 60 on each inner diameter surface of the plurality of inwardly facing tooth portions 44 formed in an annular shape. ing.

The can 60 has a resin partition flange portion 61 fixed to the pump casing 10 and a recess 62 that fits into the support shaft 20 to partition the spiral chamber 12, the rotor 30, and the stator 40, and the rotor 30. It is attached to the pump casing 10 so as to cover the pump casing 10. Further, a power feeding coupler 63 is provided on the partition flange portion 61 of the can 60, and a power feeding terminal 64 is provided on the power feeding coupler 63.

The electric water pump 1 positions the can 60 at the center of the support shaft 20 in the recess 62, and causes misalignment (center misalignment) in the circumferential direction and the radial direction between the pump casing 10 and the partition flange portion 61. It has a first play 50 to absorb. The pump casing 10 and the partition flange portion 61 are engaged with each other via the first play 50.

Further, the electric water pump 1 positions the stator 40 on the peripheral surface of the can 60 on each inner diameter surface of the plurality of inward facing teeth portions 44, and in the circumferential direction and diameter between the stator ring 41 and the can 60. It has a second play 51 that absorbs the misalignment in the direction. The stator ring 41 and the can 60 are engaged with each other with a second play 51. In this embodiment, the pump casing 10, the partition flange portion 61, and the first fastening flange 41a of the stator ring 41 are arranged in this order, and the three fastening members 91 are the first fastening flange 41a of the stator ring 41 and the first fastening flange 41a. It is passed through each screw insertion hole of the partition flange portion 61 and fastened to three of the above six case female screw portions 13 of the pump casing 10.

The control board 70 that controls the field of the stator 40 is held by the second fastening flange 41b, which is the end surface of the stator ring 41, via the fixed leg portion 52 provided so as to extend from the insulating bobbin 42b, and the power supply terminal 64 Is electrically connected to. More specifically, the collar 53 is arranged on the inner diameter side of the fixed leg portion 52, and the fastening member 92 is inserted into the collar 53 from the control board 70 side and fastened to the second fastening flange 41b of the stator ring 41. ..

Moreover, the power feeding terminal 64 is provided with a stress absorbing portion 65 that can be tilted so as to absorb the second play 51. Further, the insulating bobbin 42b is provided with a guide portion 54 that guides the tip of the power supply terminal 64 to the through hole 71 of the control board 70 adjacent to the fixed leg portion 52.

Further, the electric water pump 1 is provided with a so-called bathtub-shaped substrate housing 80 made of a conductive metal material and having a bottom wall and a peripheral wall so as to cover the control substrate 70 and the stator 40 in a liquid-tight manner. Has been done. The board housing 80 is fixed to the pump casing 10 so as to sandwich the partition flange portion 61, and in this embodiment, between the three fastening members 91 and the partition flange portion 61, A conductive collar member 66 that allows the first play 50 is interposed.

Thermal paste (not shown) is applied between the control board 70 and the board housing 80 so that the control board 70 and the board housing 80 are in close contact with each other so that heat can be conducted. Further, a first seal member 81 is provided between the can 60 and the pump casing 10. Further, a second seal member 82 is provided outside the control board 70 between the board housing 80 and the partition flange portion 61.

Next, the positional relationship between the control board 70 and the stator ring 41 will be described. As shown in FIGS. 3A and 3B, a second fastening flange 41b that supports the control board 70 via the fixed leg 52 is provided at the end of the stator ring facing the control board 70. Has been done. On the other end side of the stator ring 41 in contact with the can 60, a first fastening flange 41a to be fastened to the case female screw portion 13 by the fastening member 91 is provided. In the plan view of the stator ring 41, the second fastening flange 41b is arranged at a position where it does not overlap with the first fastening flange 41a.

As described above, in a plan view (viewed from the axial direction), the control board 70 and the second fastening flange 41b do not overlap with the first fastening flange 41a, so that they do not interfere with the insertion of the fastening tool. According to this, after the control board 70 is attached to the stator ring 41, the stator ring 41 and the can 60 can be fixed so that the tip of the power feeding terminal 64 is exposed below the control board 70 through the guide portion 54. As a result, assembly can be facilitated and productivity can be improved.

Next, the guide portion 54 and the power supply terminal 64 will be described. As shown in FIGS. 3 (a) and 4 (a) to 4 (c), the power supply terminal 64 provided in the power supply coupler 63 of the can 60 has an opening formed in the partition flange portion 61 of the can 60. It extends from 67 to the guide portion 54 side.

The power feeding terminal 64 is provided with a tiltable stress absorbing portion 65. The stress absorbing portion 65 is separated from the guide portion 54. The guide portion 54 has a length of 50% or more of the total length from the stress absorbing portion 65 of the power feeding terminal 64 to the tip on the control board 70 side, and a gap S is formed between the inner surface 54a of the guide portion 54 and the feeding terminal 64. It includes a shaped portion 54b and a narrow portion 54c formed on the control board 70 side of the box-shaped portion 54b and supporting only the tip portion of the power feeding terminal 64.

A first taper 54d is formed on the entrance side of the guide portion 54, and a second taper 54e is formed on the entrance side of the narrow portion 54c. Further, a rib 52a for connecting the fixed leg portion 52 and the guide portion 54 is provided between the fixed leg portion 52 and the guide portion 54.

Since the stress absorbing portion 65 is separated from the guide portion 54 in this way, it is possible to avoid an increase in size of the guide portion 54 by passing the linear portion of the power feeding terminal 64 through the guide portion 54. Since the power supply terminal 64 is relatively long, if all the inner holes of the guide portion 54 are formed thin, when the can 60 is aligned with the axis of the support shaft 20, the first fastening of the stator ring 41 is performed as described above. Since the tip of the power feeding terminal 64 and the through hole 71 are misaligned within the range of the second play 51 between the flange 41a and the can 60, it becomes difficult to insert the power feeding terminal 64 into the guide portion 54.

In this respect, in the present invention, the total length of the guide portion is set to be long enough to have a length of 50% or more of the total length from the stress absorbing portion 65 of the power feeding terminal 64 to the tip on the control board 70 side, whereby the inner surface of the guide portion is formed. Since a gap is formed between the power supply terminal and the entrance side of the guide portion 54, the power supply terminal can be easily inserted into the guide portion 54. Moreover, since the substrate-side tip of the power feeding terminal 64 guided to the guide portion 54 can be tilted with the stress absorbing portion 65 as a fulcrum, the misalignment due to the second play can be easily absorbed and the tip of the feeding terminal 64 can be tilted. It can be guided by the guide portion 54 and smoothly pass through the through hole 71 of the control board 70. Further, when the motor rotates, the guide unit 54 and the power supply terminal 64 vibrate, but the vibration causes the power supply terminal 64 and the guide unit 54 to hit each other and make a sound, so that there is a gap between the power supply terminal 64 and the guide unit 54. By forming (widening the clearance), the sounding can also be improved.

Further, since the guide portion 54 is formed with the first taper 54d, the tip of the power feeding terminal 64 can be easily guided even if the power feeding terminal 64 is greatly tilted. Further, since the guide portion 54 is also formed with the second taper 54e, the tip of the power feeding terminal 64 can be easily guided from the inside of the box-shaped portion 54b to the narrow portion 54c. As described above, the two-step taper of the first taper 54d and the second taper 54e allows the tip of the power feeding terminal 64 to be easily positioned to the through hole 71 even if the power feeding terminal 64 is greatly tilted.

Next, the outline of the assembly procedure of the electric water pump 1 will be described. As shown in FIGS. 1 (a) to 4 (c), the support shaft 20 is press-fitted and fixed to the pump casing 10. The rotor 30 having the impeller 31 is inserted into the support shaft 20 via the slide bearing 32, and the first seal member 81 is assembled to the pump casing 10. Subsequently, the recess 62 of the can 60 is fitted to the support shaft 20 so that the rotor 30 is covered with the pump casing 10 and the can 60. The conductive collar member 66 is fitted into the screw insertion hole of the can 60. Separately from this, a stator 40 is manufactured by attaching a pair of insulating bobbins 42a and 42b to an iron core 43 laminated from a magnetic material and winding an electromagnetic coil 46 and then connecting them in an annular shape. Is fitted inside the stator ring 41. Further, the fastening member 92 is passed through the fixing leg portion 52 provided on the insulating bobbin 42b of the stator 40 and screwed into the second fastening flange 41b, whereby the control board 70 is fixed to the stator ring 41.

At this time, the guide portion 54 and the through hole 71 are positioned, and the tip portion of the energizing terminal 47 extending from the stator 40 is inserted into the control board 70 through the through hole 71. Next, the inner peripheral surface of the stator 40 to which the control board 70 is fastened is fitted to the peripheral surface of the cylindrical portion covering the rotor 30 of the can 60. At this time, the substrate-side tip portion of the power feeding terminal 64 protruding from the can 60 is inserted into the control substrate 70 through the through hole 71 through the guide portion 54 of the insulating bobbin 42b. Three fastening members 91 are inserted in this order through the first fastening flange 41a of the stator ring 41 and the conductive collar member 66 interposed in the screw insertion hole of the can 60, and the fastening member 91 is inserted into three of the housing 10. By fastening to the female screw portion 13 of the case, each member of the can 60 covering the rotor 30 and the stator ring 41 holding the stator 40 is fixed to the housing 10. Further, the energizing terminal 47 and the feeding terminal 64 inserted through the control board 70 are soldered. The partition flange portion 61 and the substrate housing 80 are brought into contact with each other so that the second seal member 82 is interposed between the partition flange portion 61 and the substrate housing 80, and the stator 40 and the control substrate 70 are placed between the pump casing 10 and the substrate housing. While being covered with 80, the remaining three fastening members 91 are inserted into the conductive collar member 66 of the screw insertion hole of the can 60 from the screw insertion hole of the substrate housing 80 in this order, and the fastening member 91 is inserted. By fastening at 91, the assembly of the electric water pump 1 is completed.

Next, the operation of the electric water pump 1 described above will be described. A power feeding coupler 63 having a power feeding terminal 64 is provided on the partition flange portion 61, and the feeding terminal 64 extends from the partition flange portion 61. Since the guide portion 54 is provided on the insulating bobbins 42a and 42b and is integrally provided in the vicinity of the fixed leg portion 52 for fixing the control board 70, the control board 70 is fixed to the insulating bobbins 42a and 42b. The control board 70 is positioned on the guide portion 54 just by doing so.

As a result, the through hole 71 of the control board 70 faces the hole of the guide portion 54. Subsequently, when this is connected to the can 60 which is the separation wall portion, the tip of the power feeding terminal 64 is guided by the guide portion 54 and smoothly passes through the through hole 71 of the control board 70, so that the assembly becomes easy. In this way, the structure is such that the deviation (tolerance) between the can 60 provided with the power feeding coupler 63 and the insulating bobbins 42a and 42b of the stator 40 to which the control board 70 is attached is absorbed, so that the power feeding terminal extending from the can 60 is absorbed. The tip of 64 can be positioned in the through hole 71 of the control board 70, and can be easily assembled.

Further, since the stress absorbing portion 65 is separated from the guide portion 54, the linear portion of the power feeding terminal 64 is passed through the guide portion 54, so that the size of the guide portion 54 can be avoided. Since the power supply terminal 64 is relatively long, if all the inner holes of the guide portion 54 are formed thin, the positions of the tip of the power supply terminal 64 and the through hole 71 when the can 60 is aligned with the axis of the support shaft. Since the deviation becomes large, it becomes difficult to insert the power feeding terminal 64 into the guide portion 54.

In this respect, in the present invention, the total length of the guide portion 54 is increased, and a gap S is formed between the inner surface 54a of the guide portion 54 and the power supply terminal 64 to widen the entrance side of the guide portion 54, so that the power supply terminal 64 can be easily obtained. Can be inserted. Further, when the motor rotates, the guide unit 54 and the power supply terminal 64 vibrate, but the vibration causes the power supply terminal 64 and the guide unit 54 to hit each other and make a sound, so that the gap S between the power supply terminal 64 and the guide unit 54 By forming (by widening the clearance), the sounding can also be improved.

Further, since the guide portion 54 is reinforced by connecting the fixed leg portion 52 and the guide portion 54 with the rib 52a, the guide portion 54 and the through hole 71 are connected even when the power supply terminal 64 is inserted into the guide portion 54. It is possible to prevent the positional relationship from shifting. Further, when the guide portion 54 and the fixed leg portion 52 are injection-molded with the insulating bobbins 42a and 42b by resin injection, the so-called hot water circulation is improved, so that the moldability at the time of manufacturing can be improved. Further, since the rib 52a reduces the resonance of the guide portion 54 due to vibration, noise can be improved.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various design changes are made without departing from the present invention described in the claims. Is possible.

1 ... electric water pump, 10 ... pump casing, 11 ... suction port, 12 ... swirl chamber, 15 ... discharge port, 20 ... support shaft, 30 ... rotor, 40 ... stator, 41 ... stator ring, 41a ... first fastening flange , 41b ... Second fastening flange, 42a, 42b ... Insulated bobbin, 52 ... Fixed leg, 52a ... Rib, 54 ... Guide, 54a ... Inner surface, 54b ... Box-shaped, 54c ... Narrow, 60 ... Can, 61 ... partition flange, 62 ... recess, 63 ... power supply coupler, 64 ... power supply terminal, 70 ... control board, 71 ... through hole, S ... gap.

Claims (4)

A pump casing with a suction port, a discharge port, and a swirl chamber,
A rotor with a rotor magnet and an impeller housed in the spiral chamber,
With respect to the rotor, a stator arranged outside in the radial direction of rotation,
A support shaft fixed to the pump casing and rotatably supporting the rotor,
The pump casing has a resin partition flange fixed to the pump casing and a recess fitted to the support shaft to partition the spiral chamber, the rotor and the stator, and cover the rotor. An electric water pump with a mounting can and
A power supply coupler having a power supply terminal is provided on the partition flange portion, and a power supply coupler is provided.
The stator includes a stator ring attached to the pump casing via the can, an insulating bobbin provided on the stator ring, and a fixed leg portion provided so as to extend from the insulating bobbin.
The control board that controls the field of the stator is held on the end face of the stator ring via the fixed leg portion, and the control board and the power feeding terminal are electrically connected to each other.
The feeding terminal is provided with a tiltable stress absorbing portion, and the insulating bobbin is provided with a guide portion that guides the tip of the feeding terminal to a through hole of the control board adjacent to the fixed leg portion. An electric water pump characterized by being. The electric water pump according to claim 1.
The guide portion is separated from the stress absorbing portion and is separated from the stress absorbing portion.
A box-shaped portion having a length of 50% or more of the total length from the stress absorbing portion to the tip of the feeding terminal and having a gap formed between the inner surface thereof and the feeding terminal, and the tip side of the box-shaped portion. An electric water pump characterized in that it is formed in a narrow portion and is provided with a narrow portion that supports only the tip portion of the power feeding terminal. The electric water pump according to claim 2.
An electric water pump characterized in that a rib connecting the fixed leg portion and the guide portion is provided. The electric water pump according to claim 2 or 3.
A first fastening flange that is fastened to the pump casing with a fastening member is provided on one end side of the stator ring that is in contact with the can.
On the other end side of the stator ring facing the control board, a second fastening flange for supporting the control board is provided via the fixed leg portion, and a second fastening flange is provided.
An electric water pump characterized in that the second fastening flange is arranged at a position that does not overlap with the first fastening flange in a plan view of the stator ring.

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