JP2013108458A - Welding component and electric pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a welding component and an electric pump, enabling stabilization of a position of a contact part between a bonding surface of a first component and a bonding surface of a second component.SOLUTION: A bonding surface 40 of a pump casing 16 as a first component and a bonding surface 60 of a motor casing 22 as a second component are brought into contact with each other via a projection 61 formed into a convex curve at a tip 61A. Thereby, even when the bonding surface 60 of the motor casing 22 tilts with respect to the bonding surface 40 of the pump casing 16, both components can be in contact with each other within a minute range defined by the tip 61A of the projection 61.

Description

  The present invention relates to a welding component and an electric pump.

  2. Description of the Related Art Conventionally, there is known a welded part including a joint part in which a flat joint surface formed on a first part and a flat joint surface formed on a second part are overlapped and joined by thermal welding. It has been. For example, in Patent Document 1 below, a flat joint surface formed at the opening side end of the motor side case and a flat joint surface formed at the opening side end of the pump side case are overlapped and heat-welded. An electric pump is disclosed as a welded part configured to include a joined part.

JP-A-2005-90255

  However, when the flat joining surfaces are overlapped and joined by thermal welding as in the case of conventional welding parts, the joining surface of the first part and the first part are affected by pressure during temporary assembly. It is conceivable that a gap is formed between the joint surfaces of the two components. The position of the gap is not stable due to the pressure applied during temporary assembly. In other words, the position of the contact portion between the joint surface of the first component and the joint surface of the second component is not stable.

  Here, in order to improve the bonding strength and the like, when the bonding surface of the first component and the bonding surface of the second component are bonded by laser welding, the bonding surface of the first component and the second component If the position of the contact portion with the joint surface is not stable, the contact portion may be disengaged from the laser light irradiation line. As a result, it is conceivable that poor welding such as failure to obtain the required welding strength is caused.

  In view of the above facts, an object of the present invention is to obtain a welded part and an electric pump that can stabilize the position of the contact portion between the joint surface of the first part and the joint surface of the second part.

  According to a first aspect of the present invention, there is provided an electric pump according to the present invention. A motor case that houses a motor to be driven and a contact surface of the pump case with the motor case and a contact surface of the motor case with the pump case, and a tip projecting into a convex curved surface. A contact portion, and a tip of the contact portion is in contact with either the joining surface of the pump case with the motor case or the joining surface of the motor case with the pump case and joined by laser welding. And a joining portion.

  In the first aspect of the present invention, since the abutting portion whose tip protrudes into a convex curved surface is provided on either the joint surface of the pump case or the joint surface of the motor case, Even if the joint surface of the motor case is inclined, the joint surface of the pump case and the joint surface of the motor case are in contact with each other through the tip of the contact portion. In other words, even if the joint surface of the motor case is inclined with respect to the joint surface of the pump case, both can be brought into contact with each other within a narrow range of the tip of the contact portion. In other words, according to the present invention, the position of the contact portion between the joint surface of the pump case and the joint surface of the motor case can be stabilized.

  The electric pump according to a second aspect of the present invention is the electric pump according to the first aspect, wherein a joint surface of the pump case with the motor case and a joint surface of the motor case with the pump case are output of the motor. It extends along the axial direction of the shaft, and is arranged so that the joint surface of the pump case with the motor case and the joint surface of the motor case with the pump case are overlapped via the contact portion It is characterized by that.

  In the present invention described in claim 2, since the joint surface of the pump case and the joint surface of the motor case extend along the axial direction of the motor and are disposed so as to overlap each other, the pump case And the motor case are prevented from protruding outward in the radial direction of the electric pump. In other words, according to the present invention, the outer diameter of the electric pump can be reduced.

  A welding component according to the present invention described in claim 3 includes a first component formed using a laser-transmitting resin material, a second component formed using a laser-absorbing resin material, A contact portion provided on one of a joint surface of the first component with the second component and a joint surface of the second component with the first component and having a tip projecting into a convex curve shape. And a tip of the corresponding contact portion is brought into contact with the other of the joint surface of the first component with the second component and the joint surface of the second component with the first component, and the laser. And a joining portion joined by welding.

  In the third aspect of the present invention, since the abutting portion whose tip protrudes in a convex curve shape is provided on one of the joining surface of the first component and the joining surface of the second component, Even if the joint surface of the second component is inclined with respect to the joint surface of the component, the joint surface of the first component and the joint surface of the second component are in contact via the tip of the contact portion. In other words, even if the joint surface of the second component is inclined with respect to the joint surface of the first component, both can be brought into contact within a narrow range of the tip of the contact portion. That is, in the present invention described in claim 3, the position of the contact portion between the joint surface of the first component and the joint surface of the second component can be stabilized.

  According to a fourth aspect of the present invention, there is provided the welded part according to the third aspect, wherein the tip of the abutting portion is a joint surface of the first part with the second part and the second part. Positioning in a direction in which the abutting portion of the second part protrudes with respect to the first part is made by abutting on any one of the joining surfaces of the first part and the first part. It is characterized by that.

  In the fourth aspect of the present invention, even if the joint surface of the second component is inclined with respect to the joint surface of the first component, the position of the contact portion between the joint surfaces is stabilized. In other words, according to the present invention, the position of the second component relative to the first component is stabilized even if the bonding surface of the second component is inclined with respect to the bonding surface of the first component. Can do.

  According to a fifth aspect of the present invention, there is provided a welded part according to the present invention, wherein the welded part according to the third or fourth aspect is a joint surface between the first part and the second part and the second part. The joint surface with one part is taper-fitted.

  According to the fifth aspect of the present invention, since the joint surface of the first component and the joint surface of the second component are taper-fitted, the position of the second component with respect to the first component is moved to the normal position. While guiding, the joint surface of the first component and the joint surface of the second component can be fitted.

It is sectional drawing which shows the electric pump which concerns on embodiment. (A) is sectional drawing which shows a pump case, (B) is an expanded sectional view which shows the vicinity of the joint surface of a pump case. (A) is sectional drawing which shows a motor case, (B) is an expanded sectional view which shows the vicinity of the joint surface of a motor case. It is sectional drawing which shows the motor with which the impeller was attached. It is an expanded sectional view which shows the junction part of a pump case and a motor case. (A) And (B) is an expanded sectional view which shows the contact state of the front-end | tip of a contact part and the joint surface of a pump case when the joint surface of a pump case inclines with respect to the joint surface of a motor case. It is an expanded sectional view showing the joined part concerning the 1st modification. It is an expanded sectional view showing the joined part concerning the 2nd modification. (A) And (B) is an expanded sectional view which shows the contact state of the junction surface of a motor case, and the junction surface of a pump case in the junction part which concerns on a proportionality.

  An electric pump as a welding component according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5.

  As shown in FIG. 1, the electric pump 10 rotates the impeller 12 and a pump case 16 as a first part that forms a pump portion 14 that pumps inflowed fluid by rotatably housing the impeller 12. And a motor 18 that drives the pump unit 14. Further, the electric pump 10 includes a motor case 22 as a second component that houses the motor 18 and the circuit unit 20 that controls the motor 18. Furthermore, the electric pump 10 includes a cover 24.

  Hereinafter, the pump case 16, the motor case 22, and the motor 18 that are main elements of the electric pump 10 will be described, and then the joint portion 98 between the pump case 16 and the motor case 22, which is a main part of the present invention, will be described.

(Pump case 16)
As shown in FIG. 2A, the pump case 16 includes an inlet pipe 26 through which liquid flows in and an outlet pipe 28 through which liquid flows out, and is an integral part formed using a laser-transmissive resin material. . Specifically, the pump case 16 has a substantially disc flat base 30 and a bulging portion that protrudes from the radially inner end of the base 30 in the axial direction (arrow A direction) of the output shaft 76 of the motor 18 to be described later. 32. The pump case 16 also includes an impeller guide portion 34 that extends from the radially inner end of the bulging portion 32 along the shape of the first disk portion 96 of the impeller 12 described later. Further, the pump case 16 includes a tubular inlet pipe 26 formed to extend from the radially inner end of the impeller guide portion 34 in the axial direction (arrow A direction) of the output shaft 76 of the motor 18. Further, a stopper protrusion 36 that suppresses disconnection of a pipe such as a rubber hose is formed at the end of the inlet pipe 26. Further, the pump case 16 is connected to the bulging portion 32 and is formed with a tubular outlet pipe 28 extending in a direction perpendicular to the opening direction of the inlet pipe 26. At the end of the outlet pipe 28, a retaining protrusion 36 that suppresses the withdrawal of piping such as a rubber hose is formed.

  Furthermore, the pump case 16 includes a cylindrical open end 38 that extends from the radially outer end of the base 30 in the direction opposite to the axial direction (arrow A direction) of the output shaft 76 of the motor 18. That is, the open end 38 is configured to open in the direction opposite to the axial direction (arrow A direction) of the output shaft 76 of the motor 18. Further, as shown in FIG. 2B, the inner peripheral surface of the open end 38 is a joint surface 40. Further, the joint surface 40 extends in the axial direction (the direction of arrow A) of the output shaft 76 of the motor 18.

  When the impeller 12 described later is accommodated in the pump case 16 described above, the pump portion 14 (see FIG. 1) that pumps the fluid flowing in from the inlet pipe 26 toward the outlet pipe 28 is formed.

(Motor case 22)
As shown in FIG. 3A, the motor case 22 is a substantially cylindrical integral part formed using a laser-absorbing resin material. Further, a first recess 42 for accommodating a rotor 78 described later is formed at one end of the motor case 22, and a first recess for accommodating the circuit unit 20 is formed at the other end of the motor case 22. Two recesses 44 are formed.

  The first recess 42 formed at one end of the motor case 22 has a substantially U-shaped cross section that is open in the axial direction (arrow A direction) of the output shaft 76 of the motor 18. Specifically, the first recess 42 includes a circular bottom wall 46, and a tubular shape is formed at the center of the bottom wall 46 so as to protrude in the axial direction of the output shaft 76 (direction of arrow A) of the motor 18. The shaft support 48 is provided. The output shaft 76 of the motor 18 to be described later is supported by the shaft support portion 48, so that the output shaft 76 of the motor 18 can rotate about the shaft support portion 48. The first recess 42 includes an inner peripheral wall 50 that extends in the axial direction (arrow A direction) of the output shaft 76 of the motor 18 from the radially outer end of the bottom wall 46. Further, the first recess 42 includes a first impeller guide wall 52 extending from the end of the inner peripheral wall 50 to the radially outer side of the inner peripheral wall 50, and an output shaft of the motor 18 from the end of the first impeller guide wall 52. A second impeller guide wall 54 extending in the axial direction of 76 (in the direction of arrow A) is provided. The first impeller guide wall 52 and the second impeller guide wall 54 are formed along the shape of the outer peripheral end portion of the second disk portion 88 of the impeller 12 described later.

  The motor case 22 includes a side wall 58 that extends from the end portion of the second impeller guide wall 54 of the first recess 42 to the outside in the radial direction of the motor case 22 via a stepped portion 56. As shown in FIG. 3B, the motor case 22 is joined from the radially outer end of the side wall 58 in a direction opposite to the axial direction (direction of arrow A) of the output shaft 76 of the motor 18. A surface 60 is provided. Further, a protrusion 61 as a contact portion formed to protrude outward in the radial direction of the motor case 22 is formed on the joint surface 60. The protrusion 61 is provided over the entire circumference of the joint surface 60 in the motor case 22. Further, the tip 61A of the protrusion 61 is formed in a convex curved surface shape in a sectional view protruding in substantially the same direction as the direction in which the protrusion 61 protrudes. In addition, in order to make the structure of the protrusion 61 easy to understand, the size of the protrusion 61 is exaggerated in FIGS.

  As shown in FIG. 3A, the second recess 44 formed at the other end of the motor case 22 has a U-shaped cross section that opens in the opposite direction to the first recess 42. Specifically, the second recess 44 includes a circular bottom wall 64. A fixing portion (not shown) for fixing the circuit portion 20 is formed on the bottom wall 64. The second recess 44 includes an inner peripheral wall 66 that extends from the radially outer end of the bottom wall 64 in a direction opposite to the axial direction (arrow A direction) of the output shaft 76 of the motor 18.

  The motor case 22 includes an inclined wall 68 that connects the end of the inner peripheral wall 66 of the second recess 44 and the outer peripheral wall 62. The attachment portion 70 of the cover 24 is joined to the inclined wall 68.

  In addition, the motor case 22 includes an external power supply connection portion 72 that is formed to protrude outward in the radial direction of the outer peripheral wall 62. The external power supply connection unit 72 is provided with a supply terminal 74 for supplying an external power supply to the circuit unit 20.

(Motor 18)
As shown in FIG. 4, the motor 18 includes an output shaft 76, a rotor 78, and a stator 80 as main elements.

  The output shaft 76 is configured by subjecting a cylindrical steel material to surface treatment such as carburizing treatment, and one end portion thereof is a rotating shaft portion 82 inserted into the shaft support portion 48 of the motor case 22. Has been. That is, the output shaft 76 is cantilevered by the shaft support 48.

  The rotor 78 has a compact cylindrical shape that is disposed radially outside the output shaft 76. A plurality of magnets 84 are provided inside the rotor 78 along the circumferential direction. Further, the rotor 78 is fixed to the output shaft 76 via a rotor holding member 86.

  Further, the rotor 78 is integrally formed with a disk-shaped second disk portion 88 centering on the output shaft 76 of the motor 18 via the connection portion 90, and the second disk portion 88 has a circumference thereof. A plurality of blades 92 are erected along the direction. Further, a disk-shaped first disk portion 96 having a through hole 94 at the center is joined to the end portions of the plurality of blades 92. The impeller 12 is configured by the first disk portion 96, the second disk portion 88, and the plurality of blades 92 described above.

  The stator 80 is configured by winding a conductive winding (not shown) around an annular yoke. The stator 80 is disposed so as to surround the rotor 78, and the rotor 78 rotates around the output shaft 76 as a result of receiving a magnetic field generated by the stator 80. As the rotor 78 rotates, the impeller 12 connected to the rotor 78 rotates. The stator 80 is fixed by being cast into the motor case 22 (see FIG. 3).

  Next, the joint part 98 between the pump case 16 and the motor case 22 which is a main part of the present invention will be described.

(Junction 98)
As shown in FIG. 5, the joint surface 40 provided on the pump case 16 and the joint surface 60 provided on the motor case 22 are arranged so as to overlap each other. As a result, the joint surface 40 provided on the pump case 16 and the tip 61A of the protrusion 61 provided on the joint surface 60 of the motor case 22 come into contact with each other. In other words, the joint surface 40 provided on the pump case 16 and the joint surface 60 provided on the motor case are in contact with each other via the tip 61 </ b> A of the protrusion 61. In addition, as described above, the joining surface 40 provided on the pump case 16 and the joining surface 60 provided on the motor case are brought into contact with each other via the protruding portion 61, thereby positioning the motor case 22 with respect to the pump case 16. Is made. Subsequently, the joining part 98 is comprised by joining the joining surface 40 provided in the pump case 16, and the front-end | tip 61A of the projection part 61 provided in the joining surface 60 of the motor case by laser welding.

  In the present embodiment, the pump case 16 is formed using a laser-transmitting resin material, and the motor case 22 is formed using a laser-absorbing resin material. In this case, when a laser is applied to the open end portion 38 of the pump case 16 from the outside, the laser is absorbed at the tip 61A of the projection 61 provided on the joint surface 60 of the motor case 22 to generate heat. Due to this heat, a welded portion 100 is formed between the joint surface 40 provided on the pump case 16 and the tip 61A of the protrusion 61 provided on the joint surface 60 of the motor case. Further, in the present embodiment, the welded portion 100 is continuously provided on the entire circumference between the joining surface 40 provided on the pump case 16 and the tip 61A of the projection 61 provided on the joining surface 60 of the motor case. ing.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  When the pump case 16 and the motor case 22 are joined, as shown in FIG. 9, when the flat joining surface 400 and the flat joining surface 600 are overlapped and joined by laser welding, joining of the pump case 16 is performed. It is conceivable that the joint surface 600 of the motor case 22 is inclined with respect to the surface 400. In this case, a gap is generated between the joint surface 400 of the pump case 16 and the joint surface 600 of the motor case 22, and accordingly, the joint surface 400 of the pump case 16 and the joint surface 600 of the motor case 22 are formed. The position of the contact portion C1 is not stable (in the main joining portion 980, a positional deviation of a maximum d1 occurs along the axial direction of the output shaft 76 of the motor 18 (arrow A direction)). In this case, it is conceivable that the contact portion C1 deviates from the laser light irradiation line (the range surrounded by the one-dot chain line) irradiated from the laser welding machine. As a result, it is conceivable that poor welding occurs at the joint 980, and as a result, the fluid flowing inside the electric pump leaks out from the joint 980 between the pump case 16 and the motor case 22.

  However, in the electric pump 10 of the present embodiment, the protrusion 61 having the tip 61 </ b> A protruding in a convex curved shape is provided on the joint surface 60 of the motor case 22. Therefore, as shown in FIG. 6, even if the joint surface 60 of the motor case 22 is inclined with respect to the joint surface 40 of the pump case 16, the joint surface 40 of the pump case 16 and the joint surface 60 of the motor case 22 are Contact is made via the tip 61A of the protrusion 61. In other words, the joint surface 40 of the pump case 16 and the joint surface 60 of the motor case 22 are in contact with each other within a narrow range of the tip 61A of the protrusion 61 (in this embodiment, the axial direction of the output shaft 76 of the motor 18). (Along the direction of arrow A), both come in contact within the range of d2.) That is, in the electric pump 10 of the present embodiment, the position of the contact portion C2 between the joint surface 40 of the pump case 16 and the joint surface 60 of the motor case 22 can be stabilized.

  In the present embodiment, the joint surface 40 of the pump case 16 and the joint surface 60 of the motor case 22 extend in the axial direction of the output shaft 76 of the motor 18 (in the direction of arrow A), and the two are overlapped. Therefore, the joint portion 98 between the pump case 16 and the motor case 22 is prevented from protruding outward in the radial direction of the electric pump 10. In other words, in the present embodiment, the outer diameter of the electric pump 10 can be reduced.

  Furthermore, in this embodiment, even if the joint surface 60 of the motor case 22 is inclined with respect to the joint surface 40 of the pump case 16, as described above, the position of the contact portion C2 between both joint surfaces is stabilized. In other words, in this embodiment, even if the joint surface 60 of the motor case 22 is inclined with respect to the joint surface 40 of the pump case 16, the position of the motor case 22 with respect to the pump case 16 can be stabilized.

  Further, in the present embodiment, the welded portion 100 at the joint portion 98 is continuous over the entire circumference between the joint surface 40 provided on the pump case 16 and the tip 61A of the protrusion 61 provided on the joint surface 60 of the motor case. Is provided. Therefore, it is possible to ensure the sealing performance at the joint portion 98 between the pump case 16 and the motor case 22 without providing a separate sealing material.

  Furthermore, in this embodiment, since the joint part 98 of the pump case 16 and the motor case 22 is joined by laser welding, it is possible to obtain a uniform and high welding strength as compared with, for example, the joining by orbital welding. it can. As a result, the sealing performance and bonding strength at the welded portion can be further improved.

(First modification)
Next, the joint part according to the first modification will be described with reference to FIG. In addition, about the member same as the said embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 7, in the joint portion 102 according to this modification, the protrusion 41 as the contact portion is formed so as to protrude from the joint surface 40 of the pump case 16, and the tip 41 </ b> A of the protrusion 41. A feature is that the abutted portion 63 that abuts is formed to protrude from the joint surface 60 of the motor case 22.

  The protrusion 41 protrudes radially inward of the joint surface 40 of the pump case 16 and is provided over the entire circumference of the joint surface 40 of the pump case 16. Furthermore, the tip 41 </ b> A of the protrusion 41 is formed in a convex curved surface shape in a cross-sectional view protruding in substantially the same direction as the direction in which the protrusion 41 protrudes.

  The abutted portion 63 protrudes radially outward of the joining surface 60 of the motor case 22 and is provided over the entire circumference of the joining surface 60 of the motor case 22. Further, the tip of the contacted portion 63 is a contacted surface 63A on which the tip 41A of the protrusion 41 contacts. The abutted surface 63A extends substantially parallel to the joint surface 60 of the motor case 22 and is formed in a planar shape. In other words, the abutted surface 63A can be said to be a surface formed by projecting a part of the joining surface 60 of the motor case 22 outward in the radial direction of the joining surface 60. In order to make the configuration of the protrusion 41 and the contacted portion 63 easier to understand, the sizes of the protrusion 41 and the contacted portion 63 are exaggerated in FIG.

  Further, the joining surface 40 provided on the pump case 16 and the joining surface 60 provided on the motor case 22 are arranged so as to overlap each other, whereby the tip 41A of the protrusion 41 is brought into contact with the contacted portion 63. It contacts the surface 63A. Next, the joint portion 102 is configured by joining the tip 41A of the protrusion 41 and the abutted surface 63A of the abutted portion 63 by laser welding.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  In the present embodiment, in order to join the pump case 16 and the motor case 22, when the laser is irradiated to the open end 38 of the pump case 16, the contacted portion 63 provided on the joining surface 60 of the motor case 22 is The abutted surface 63A absorbs the laser and generates heat. As a result, the abutted surface 63A is melted, and thermal energy in the abutted surface 63A is diffused into the motor case 22. However, in the present embodiment, since the abutted portion 63 is formed so as to protrude from the joining surface 60 of the motor case 22, the heat energy in the abutted surface 63A is not easily diffused into the motor case 22 (particularly, The thermal energy is less likely to diffuse in the axial direction (arrow A direction) of the output shaft 76 of the motor 18 and in the direction opposite to this direction). As a result, in this embodiment, the laser output of the laser welding machine can be further reduced. In other words, in this embodiment, it is possible to save energy in the step of performing laser welding.

(Second modification)
Next, the joint part according to the second modification will be described with reference to FIG. In addition, the same code | symbol is attached | subjected about the member same as the said embodiment etc., and the description is abbreviate | omitted.

  As shown in FIG. 8, the joint portion 104 according to this modification is characterized in that the joint surface 40 of the pump case 16 and the joint surface 60 of the motor case 22 are tapered.

  The joint surface 40 of the pump case 16 is formed in a tapered shape that is widened toward the opening direction of the open end portion 38. Further, a protrusion 41 </ b> A is formed on the joint surface 40.

  The joint surface 60 of the motor case 22 is formed in a tapered shape that is narrowed in the axial direction (direction of arrow A) of the output shaft 76 of the motor 18.

  The joint surface 40 provided on the pump case 16 and the joint surface 60 provided on the motor case 22 are taper-fitted in the axial direction (arrow A direction) of the output shaft 76 of the motor 18, thereby causing a protrusion. A tip 41 </ b> A of 41 abuts on the joint surface 60 of the motor case 22. Next, the joint portion 104 is configured by joining the tip 41A of the protrusion 41 and the joint surface 60 of the motor case 22 by laser welding.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  In this embodiment, since the joint surface 40 of the pump case 16 and the joint surface 60 of the motor case 22 are taper-fitted, the position of the motor case 22 with respect to the pump case 16 is guided to the regular position while the pump case 16 is guided. The 16 joining surfaces 40 and the joining surface 60 of the motor case 22 can be fitted.

  In the above-described embodiment and the modification, the example in which the present invention is applied to the electric pump as the welding part has been described. However, the present invention is not limited to this, for example, the tank upper part and the first part as the first part. You may apply this invention to the liquid tank as a welding component formed by joining the tank lower part as 2 components with laser welding. As described above, according to the present invention, the first component formed using the laser-transmitting resin material and the second component formed using the laser-absorbing resin material are joined by laser welding. It can be applied to any welded parts formed by

  Further, in the above-described embodiment and the modification, the example in which the tip of the projecting portion formed in the convex curved surface is in contact with the flat joint surface or the contacted surface has been described. For example, the bonding surface or the abutted surface may be formed in a convex curved shape or a concave curved shape.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and various modifications other than the above can be implemented without departing from the spirit of the present invention. Of course.

10 Electric pump (welded parts)
12 impeller
14 Pump part
16 Pump case (first part)
18 Motor
22 Motor case (second part)
40 joint surface
41 Protruding part (contact part)
41A tip
60 joint surface
61 Protruding part (contact part)
61A Tip
63A Contact surface (joint surface)
76 Output shaft
98 joints 100 welds 102 joints 104 joints

Claims (5)

A pump case that forms an outline of a pump part that pumps inflowed fluid by accommodating the impeller rotatably;
A motor case that houses a motor that drives the pump unit by rotating the impeller;
The pump case includes a contact portion provided on one of a joint surface of the pump case with the motor case and a joint surface of the motor case with the pump case, and a tip projecting into a convex curved surface. A joint where the tip is in contact with either the joint surface of the pump case with the motor case or the joint surface of the motor case with the pump case and joined by laser welding;
Electric pump equipped with.   The joint surface of the pump case with the motor case and the joint surface of the motor case with the pump case extend along the axial direction of the output shaft of the motor, and the joint of the pump case with the motor case. 2. The electric pump according to claim 1, wherein a surface of the motor case and a joint surface of the motor case with the pump case are arranged so as to overlap each other via the contact portion. A first component formed using a laser-transmissive resin material;
A second component formed using a laser-absorbing resin material;
A contact portion provided on one of a joint surface of the first component with the second component and a joint surface of the second component with the first component and having a tip projecting into a convex curved surface And the front end of the corresponding contact portion is in contact with either one of the joint surface of the first component with the second component and the joint surface of the second component with the first component; A joined portion joined by laser welding;
Welding parts with   The tip of the abutting part abuts on the other joining surface of the joining surface of the first component with the second component and the joining surface of the second component with the first component. The welded part according to claim 3, wherein positioning of the second part with respect to the first part in a direction in which the abutting portion protrudes is performed.   The welded part according to claim 3 or 4, wherein a joining surface of the first part with the second part and a joining surface of the second part with the first part are taper-fitted.

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