JP2020124003A - Pump device - Google Patents

Abstract

To attain reduction in the number of components.SOLUTION: A pump device comprises: a rotor 40; a stator 50 disposed around the rotor; a resin sealing member 60 covering the stator; and a circuit board 70 connected to a coil 54 of the stator. The circuit board includes a lead connection part 71 for electrically connecting a conductor 721 of a lead wire 72 to the circuit board, and the circuit board is embedded in the resin sealing member in a state where the lead connection part protrudes outside. In this structure, the need of a connector for connecting the lead wire to the circuit board is eliminated, thereby attaining reduction in the number of components.SELECTED DRAWING: Figure 3

Description

The present invention relates to a pump device integrated with a motor.

A conventional pump device integrated with a motor includes, for example, a pump case, an impeller, a rotor, a stator, a resin molded body, a circuit board, and the like.
The resin molded body seals the stator and the circuit board. A rotor is arranged inside the stator via a separating plate for waterproofing, and the rotor is connected to an impeller arranged in the pump chamber of the pump case.
The pump case includes a suction port and a discharge port, and by rotating the rotor and the impeller, the fluid can be sucked into the pump chamber from the suction port and discharged from the discharge port (for example, refer to Patent Document 1).

In the above conventional pump device, the entire circuit board is embedded in the resin molded body, and only the connection end of the connector-type lead connecting component provided at one end of the circuit board is exposed to the outside of the resin molded body. The lead wire is connected to the plurality of openings formed at the connection end of the lead connecting component.

JP, 2011-117378, A

However, since the above-described conventional pump device is configured to mount the connector-type lead connection parts on the circuit board, there arises a problem that the number of parts and the cost of parts increase.

An object of the present invention is to reduce the cost of the device.

In order to solve the above problems, the pump device of the present invention,
Rotor and
A stator arranged around the rotor,
A resin sealing member covering the stator,
A circuit board connected to the coil of the stator,
The circuit board has a lead connection portion for electrically connecting a conductor of a lead wire to the circuit board,
The circuit board is embedded in the resin sealing member in a state in which the lead connecting portion projects to the outside.

In the pump device of the present invention, since the lead connecting portion of the circuit board projects from the resin sealing member, the lead wire can be directly connected to the circuit board without using a connector or the like. Therefore, it is possible to reduce the number of parts and the cost of connecting parts such as connectors.

In the pump device of the present invention,
The lead connection portion has a connection surface for connecting the conductor of the lead wire.

In the pump device of the present invention, since the lead connecting portion has the connecting surface for connecting the conductor of the lead wire, it is possible to easily connect the lead wire by using solder or brazing material.

In the pump device of the present invention,
The lead connecting portion has an insertion hole for a conductor of the lead wire that penetrates the circuit board.

In the pump device of the present invention, since the lead connecting portion has the insertion hole for the conductor of the lead wire, the conductor of the lead wire can be attached at an accurate position. Further, since the conductor of the lead wire is connected in a state of passing through the insertion hole, peeling is less likely to occur and the connection strength can be maintained high.

In the pump device of the present invention,
It is characterized by comprising the lead wire connected to the lead connection part.

Since the pump device of the present invention includes the lead wire connected to the lead connection portion, it is possible to easily connect the pump device to an external power source or the like.

In the pump device of the present invention,
A case member surrounding the lead connecting portion protruding from the resin sealing member is provided.

In the pump device of the present invention, the case member can protect the lead connecting portion protruding from the resin sealing member to the outside from an impact from the outside, and further, the occurrence of damage such as disconnection in the lead connecting portion. It becomes possible to reduce.

In the pump device of the present invention,
A sealing material that covers the exposed conductors of the lead connection portion and the lead wire is enclosed inside the case member.

In the pump device of the present invention, since the sealing material is enclosed inside the case member, the lead connecting portion and the exposed conductor portion of the lead wire can be waterproof and dustproof.

In the pump device of the present invention,
The sealing material is an adhesive.

Since the pump device of the present invention uses the sealing material as the adhesive, the sealed state can be firmly maintained, and the waterproof and dustproof effects can be maintained for a long period of time.
Further, when the adhesive has curability, the sealing material itself can protect the lead connecting portion and the conductor of the connected lead wire from an impact from the outside.

In the pump device of the present invention,
The case member is characterized in that it has a storage portion for the sealing material inside.

Since the pump device of the present invention has the storage portion of the sealing material inside the case member, it is possible to reduce the occurrence of leakage of the sealing material in the sealing work and improve the workability. Become. It is also possible to reduce the occurrence of leakage of the sealing material over time.
Further, since leakage is suppressed, it is possible to use a sufficient amount of the sealing material, and it is possible to improve waterproofness and dustproofness.

In the pump device of the present invention,
The case member is characterized in that the case member has an insertion portion that is passed through the outside of the case member while restraining the lead wire.

In the pump device of the present invention, since the lead wire extending from the circuit board to the outside of the case member is constrained by the insertion portion in the middle, it is possible to suppress bending stress or the like from being applied to the conductor of the lead wire connected to the lead connecting portion. It is possible to protect the conductor.

In the pump device of the present invention,
The case member is characterized in that it has a support portion that supports the lead wire that is passed from the insertion portion to the outside in a state of being folded back at the insertion portion.

Since the pump device of the present invention supports the lead wire that is passed from the insertion portion to the outside in a state of being folded at the insertion portion, the folded portion has an extra length, and when the lead wire is pulled from the outside, the lead connection portion is provided. It is possible to suppress the application of tensile stress or the like to the conductor of the lead wire and to protect the conductor.

In the pump device of the present invention,
Between the case member and the resin sealing member, a first mounting structure part and a second mounting structure part for mounting the case member to the resin sealing member,
Each of the first mounting structure and the second mounting structure is a fitting structure with a recess and a protrusion,
The moving direction of the case member when fitting the concave portion and the convex portion of the first mounting structure portion and the moving direction of the case member when fitting the concave portion and the convex portion of the second mounting structure portion It is characterized in that the moving directions of the case member are opposite to each other.

In the pump device according to the present invention, the fitting operation directions of the case member are opposite to each other in the first mounting structure portion and the second mounting structure portion, so that the fitting operation direction of the case member or the resin sealing member is By expanding and contracting, the case member can be attached and the attached state can be maintained. Therefore, the case member can be easily attached, and the workability at the time of manufacturing the device can be improved.

In the pump device of the present invention,
A metal member is provided at one end of the resin sealing member in the axial direction of the rotor,
The metal member shields the lead connecting portion protruding from the resin sealing member when viewed from the metal member side in the axial direction of the rotor.

Since the pump device of the present invention has a structure in which the metal member shields the lead connecting portion, the lead connecting portion protruding from the resin sealing member to the outside can be protected from an impact from the outside, and further, It is possible to reduce the occurrence of breakage such as wire breakage in the lead connection portion.

According to the present invention, since the lead connecting portion of the circuit board projects from the resin sealing member, the lead wire can be directly connected to the circuit board without using a connector or the like. Therefore, it is possible to reduce the number of parts and the cost of connecting parts such as connectors.

It is a perspective view of a pump device which is an embodiment of the invention. It is a longitudinal cross-sectional view along the axis line which passes through the center of the rotor of a pump apparatus. It is a perspective view which shows the lead connection part which protruded outside from the resin sealing member. FIG. 7 is another perspective view showing a lead connecting portion protruding from the resin sealing member to the outside. It is a partial top view of the pump device which omits illustration of a part of composition. It is a partial bottom view of a pump device. It is sectional drawing of the pump apparatus along the VV line in FIG. It is a perspective view of a case member. It is the perspective view which notched one part of the pump apparatus containing a case member.

[Outline of Embodiment]
As an embodiment of the invention, a pump device 10 will be described with reference to the drawings. 1 is a perspective view of the pump device 10, and FIG. 2 is a vertical cross-sectional view taken along an axis L passing through the center of a rotor 40 (described later) of the pump device 10.
In the pump device 10, the fluid to be sucked and discharged is a liquid, and is mounted on, for example, a water heater, a washing machine, a dishwasher, or the like, is connected to a water supply, and supplies tap water to a device that is a mother body. It is suitable for applications.

In the following description, as shown in FIGS. 1 and 2, one direction along the axis L of the rotor shaft of the pump device 10 is referred to as the “upper” side Z1 of the device, and the opposite direction is the “lower” side. It is defined as Z2 for convenience. Further, the direction orthogonal to the axis L is the horizontal direction. The horizontal direction, in which the lead connection portion 71 of the circuit board 70, which will be described later, extends is defined as the "front" side Y1 of the device, and the opposite direction is defined as the "rear" side Y2. Further, the left side of the pump device 10 as viewed from the lead connecting portion 71 side is defined as the “left” side X1 of the device, and the opposite direction is defined as the “right” side X2.

The pump device 10 includes a pump mechanism portion 20 that sucks and discharges a fluid and a motor 30 that is a drive source thereof, and has a structure in which these are integrated.
The pump mechanism section 20 mainly includes a case body 21 that forms a pump chamber 22 inside and an impeller 23 that is arranged in the pump chamber 22.
Further, the motor 30 includes a rotor 40, a stator 50 arranged around the rotor 40, a resin sealing member 60 covering the stator 50, a circuit board 70 connected to the coil 54 of the stator 50, and a resin sealing. A separation plate 80 for separating the member 60 from the fluid in the pump chamber 22 and a metal member 90 provided on the upper end surface of the resin sealing member 60 are provided.

[Pump mechanism part]
As shown in FIGS. 1 and 2, the case body 21 of the pump mechanism portion 20 includes a substantially cylindrical peripheral wall portion 211 having an axis L as a center and a bottom plate portion 212 closing a lower end portion of the peripheral wall portion 211. I have it. The upper end of the peripheral wall portion 211 is connected to the lower end of the resin sealing member 60 of the motor 30 via the separation plate 80.
The shape of the cross section of the peripheral wall portion 211 perpendicular to the axis L is substantially circular, and the shape of the cross section of the resin sealing member 60 perpendicular to the axis L is also substantially circular. The peripheral wall portion 211 and the resin sealing member 60 are concentrically connected to each other.

At the center of the bottom plate portion 212, a tubular fluid suction port 213 extending to the lower side Z2 is formed. Further, a tubular fluid discharge port 214 is formed on the outer circumference of the peripheral wall portion 211.
The fluid suction port 213 is formed concentrically with the peripheral wall portion 211 at the center of the bottom plate portion 212.
On the other hand, the fluid discharge port 214 extends in the horizontal direction parallel to the tangential direction of the peripheral wall portion 211 which is circular in plan view.
Both the fluid suction port 213 and the fluid discharge port 214 communicate with the pump chamber 22 that is the internal space of the case body 21.

At the center of the inside of the case body 21, a cylindrical first rotor support portion 215 having an axis L described later as a center is provided. The first rotor support portion 215 opens toward the upper side Z1 and inserts and supports the lower end portion of the rotation shaft 41 of the rotor 40.
The first rotor support portion 215 is located on the upper side Z1 of the fluid suction port 213, and is located on the path of the fluid flowing from the fluid suction port 213. However, since it is supported by three blade-shaped leg portions (one is not shown) 216 provided upright on the upper surface of the bottom plate portion 212, fluid can pass between the leg portions 216. , It does not prevent the inflow of fluid.

As described above, the impeller 23 is arranged in the center of the pump chamber 22 with the axis L as the center of rotation. The impeller 23 includes a circular rotary plate 232 having an open center, and a plurality of spiral blades 231 provided upright on the upper surface of the rotary plate 232.
The first rotor support portion 215 and the leg portion 216 are loosely inserted into the central opening of the rotary plate 232.
In the impeller 23, the upper end of each blade 231 is fixedly connected to the lower end of the rotor 40.

When the motor 30 is driven, the impeller 23 rotates together with the rotor 40 about the axis L, and the plurality of blades 231 causes the fluid in the pump chamber 22 to flow in the rotation direction. As a result, the fluid is subjected to centrifugal force to have a low pressure inside the radial direction and a high pressure outside the radial direction, so that the fluid is sucked from the fluid suction port 213 and discharged from the fluid discharge port 214.

[Motor: Resin sealing member and separation plate]
As shown in FIG. 2, the resin sealing member 60 has a substantially cylindrical peripheral wall portion 61 centered on the axis L and an upper wall portion 62 that closes the upper end portion of the peripheral wall portion 61. The peripheral wall portion 61 and the upper wall portion 62 forming the resin sealing member 60 are integrally molded by BMC (Bulk Molding Compound) which is a thermosetting resin material.

The upper wall portion 62 has a flat and horizontal upper surface, and a metal member 90 is mounted on the upper wall portion 62.
Further, in the upper wall portion 62, most of a substantially circular circuit board 70 having an outer diameter slightly smaller than that of the upper wall portion 62 is embedded in a horizontal state.

The peripheral wall portion 61 is formed in a state in which almost the entire structure of the stator 50 is sealed with resin inside.
The peripheral wall portion 61 has an opening on the lower side Z2, and the case body 21 described above is attached via a separation plate 80 so as to close the opening portion.
The rotor 40 is arranged in the internal space of the peripheral wall portion 61. The inner space of the peripheral wall portion 61 communicates with the pump chamber 22 of the case body 21. However, in this state, the fluid in the pump chamber 22 can penetrate into the stator 50 embedded in the peripheral wall portion 61 through the pump mechanism portion 20, so that the space between the resin sealing member 60 and the case body 21 can be reduced. A separation plate 80 for sealing the fluid is provided.

The separation plate 80 includes a flange portion 81 that is in close contact with the lower end surface of the peripheral wall portion 61 of the resin sealing member 60, a cylindrical portion 82 that is in close contact with the inner peripheral surface of the peripheral wall portion 61, and an upper wall portion 62 of the resin sealing member 60. A ceiling portion 83 that is in close contact with the lower surface of the above, and an annular bulging portion 84 that is located between the flange portion 81 and the cylindrical portion 82 and bulges toward the lower side Z2.
The flange portion 81, the cylindrical portion 82, the ceiling portion 83, and the bulging portion 84 of the separating plate 80 are integrally formed of a resin material without a joint, and all of them have a function of blocking fluid.

The flange portion 81 is sandwiched between the lower end surface of the peripheral wall portion 61 of the resin sealing member 60 and the upper end surface of the peripheral wall portion 211 of the case body 21 to seal between them.
The bulging portion 84 bulges and fits inside the upper end portion of the peripheral wall portion 211 of the case body 21. An O-ring 841 as a sealing material is provided between the outer circumference of the bulging portion 84 and the inner circumference of the peripheral wall portion 211, and the O-ring 841 also seals the fluid.

The rotor 40 is arranged inside the cylindrical portion 82 with a gap. Further, the stator 50 is arranged on the outer peripheral side of the cylindrical portion 82, and the rotor 40 and the stator 50 are arranged close to each other via the cylindrical portion 82.

At the center of the lower surface of the ceiling portion 83, a cylindrical second rotor support portion 85 centered on the axis L is arranged. The second rotor support portion 85 opens toward the lower side Z2 and inserts and supports the upper end portion of the rotation shaft 41 of the rotor 40.
The second rotor support portion 85 is integrally formed with the ceiling portion 83 by using the same resin material as that of the ceiling portion 83.

[Motor: rotor]
As shown in FIG. 2, the rotor 40 includes a rotating shaft 41 arranged in the up-down direction about the axis L, a magnet 42 provided on the outer periphery of the rotating shaft 41, and the magnet 42 serving as the rotating shaft 41. And a holding member 43 for holding at a concentric position.

The rotating shaft 41 is a round rod made of stainless steel, the lower end of which is supported by the above-described first rotor support portion 215, and the upper end of which is supported by the above-mentioned second rotor support portion 85.

The holding member 43 includes a tubular portion 431 that holds the magnet 42 in the upper portion, and a circular flange portion 432 in the lower portion.
The flange portion 432 is a circular plate having substantially the same diameter as the impeller 23, and the lower surface side thereof fixedly supports the impeller 23.

An annular magnet 42 is held concentrically with the rotating shaft 41 on the outer circumference of the tubular portion 431. In addition, the tubular portion 431 includes a sleeve 44, which is a plain bearing, inside. Therefore, the holding member 43 can rotate integrally with the magnet 42 and the impeller 23 about the rotation shaft 41.

Further, the tubular portion 431 has enlarged diameter portions 431a and 431b formed inside the lower end portion and the upper end portion, respectively. The first rotor support portion 215 is loosely inserted inside the lower expanded portion 431a, and the second rotor support portion 85 is loosely inserted inside the upper expanded portion 431b. Has been inserted.
Due to these expanded diameter portions 431a and 431b, the first rotor support portion 215 and the second rotor support portion 85 can be arranged inside the tubular portion 431, and the pump device 10 can be downsized in the vertical direction. it can.

The magnet 42 has an annular shape as described above, and has N poles and S poles alternately magnetized in the circumferential direction on the outer circumference thereof.

[Motor: Stator]
As shown in FIG. 2, the stator 50 includes an annular stator core 51 facing the outer peripheral surface of the magnet 42 of the rotor 40 via a cylindrical portion 82 of the separation plate 80, and upper and lower insulators 52, 53 on the stator core 51. And a plurality of wound coils 54.

The stator core 51 is made of a magnetic material, and has an annular portion 511 centered on the axis L, and nine salient pole portions 512 extending from the inner peripheral surface of the annular portion 511 toward the central axis L. Equipped with. The salient pole portions 512 are formed at equal angular intervals in the circumferential direction about the axis L. The extending end portion of each salient pole portion 512 is provided with a facing portion 513 that extends in the circumferential direction around the axis L. The facing portion 513 faces the outer peripheral surface of the magnet 42 of the rotor 40 via the cylindrical portion 82 of the separation plate 80 with a predetermined gap.

The upper and lower insulators 52, 53 are made of an insulating material such as resin, and form a pair in the upper and lower directions to cover the salient pole portion 512 of the stator core 51 and its periphery.
The insulator 52 on the upper side Z1 faces the body 521, which is a half-divided cylindrical body that covers the upper half of the salient pole portion 512, and the outer flange 522, which covers the upper half of the inner peripheral surface of the annular portion 511. The inner flange portion 523 covers the upper half of the outer peripheral surface of the portion 513.
The insulator 53 on the lower side Z2 includes a body portion 531 that is a half-divided tubular body that covers the lower half of the salient pole portion 512, and an outer collar portion 532 that covers the lower half of the inner peripheral surface of the annular portion 511. The inner flange 533 covers the lower half of the outer peripheral surface of the facing portion 513.

Although the upper and lower insulators 52 and 53 have a structure in which the periphery of each salient pole portion 512 of the stator core 51 is covered by an upper and lower half structure, the stator core 51 is insert-molded to form an insulator. May be integrally formed with the stator core 51.

The coil 54 is configured by a conductor wire made of an aluminum alloy or a copper alloy, which is wound around the salient pole portion 512 of the stator core 51 via the upper and lower insulators 52 and 53.
The motor 30 is a three-phase brushless motor, and the nine coils 54 formed in each of the nine salient pole portions 512 include three U-phase coils, three V-phase coils, and three W-phase coils. Composed of.

[Motor: Metal member]
The metal member 90 is a reinforcing member provided on the upper surface of the resin sealing member 60, as described above.
The metal member 90 includes a disk-shaped main body portion 91 that is in close contact with the upper surface of the resin sealing member 60, an annular rib 92 formed on the outer peripheral surface of the upper surface of the main body portion 91, and a circumferential direction on the outer peripheral surface of the lower surface of the main body portion 91. And four projecting portions 93 (only two are shown in FIG. 1) provided at even intervals. In the metal member 90, a main body 91, an annular rib 92, and a protrusion 93 are integrally formed of a metal material, for example, aluminum die casting.

The annular rib 92 imparts high rigidity to the flat plate-shaped main body 91 and suppresses the bending of the main body 91.
The projecting portion 93 is formed with a screw hole penetrating the center thereof, and is integrally formed with the case body 21, the separation plate 80, and the screw 94 penetrating the resin sealing member 60 from the lower side Z2 of the pump device 10. The metal member 90 is fastened and fixed.

[Motor: Circuit board]
The circuit board 70 is provided with a Hall element that detects the rotational position of the rotor 40.
The circuit board 70 is connected to the conductor of the coil 54 of the stator 50 described above, and a circuit for controlling the current flowing through each coil 54 is formed in accordance with the rotational position of the rotor 40 detected by the Hall element. There is.

The circuit board 70 has a generally circular shape in a plan view, and a lead connecting portion 71 for connecting a lead wire 72 for connecting the circuit board 70 to a power supply circuit outside the machine extends radially outward. Has been issued.
In the following description, the structure around the lead connection portion 71 of the circuit board 70 will be described in detail.

3 is a perspective view of the lead connecting portion 71 projecting outward from the resin sealing member 60 as seen obliquely from the upper right front, FIG. 4 is a perspective view seen obliquely from the lower right front, FIG. 5 is a plan view, and FIG. 6 is a bottom view. FIG. 7 and FIG. 7 are sectional views taken along the line VV in FIG. It should be noted that the metal member 90 is not shown in FIGS. 3 to 5 and 7 (shown by a chain double-dashed line in FIG. 5), and the case member 75, which will be described later, is omitted in FIGS. 3 and 4.

As described above, most of the circuit board 70 is embedded in the resin sealing member 60, and only the lead connecting portion 71 projects forward from the surface of the upper front side Y1 of the resin sealing member 60.
As shown in FIGS. 3 and 4, the lead connecting portion 71 has a substantially rectangular shape in a plan view, and four insertion holes 711 of the conductor 721 of the lead wire 72 are arranged in the front end of the lead connecting portion 71 at equal intervals in the left-right direction. It is formed by penetrating vertically. In addition, a connection surface 712 that electrically connects the conductor 721 of the lead wire 72 is formed around each insertion hole 711 on the upper surface of the lead connection portion 71. The connection surface 712 is formed of a thin film of a good conductor such as a copper alloy or an aluminum alloy. Note that the numbers of the insertion holes 711 and the connection surfaces 712 are merely examples, and can be increased or decreased as necessary.
For example, in the lead wire 72, the conductor 721 is inserted from the lower side Z2 into the insertion hole 711 of the lead connecting portion 71, and the upper surface Z1 of the lead connecting portion 71 is connected to the connecting surface 712 by soldering.
Further, as shown in FIG. 5, the entire area of the lead connecting portion 71 projecting outside the resin sealing member 60 is shielded inside the metal member 90 when viewed from above.

A support portion 63 projecting forward is integrally formed with the peripheral wall portion 61 at an upper portion of the front side Y1 on the outer peripheral surface of the peripheral wall portion 61 of the resin sealing member 60.
The support portion 63 has a rectangular shape when viewed from the front, and as shown in FIG. 7, has a recess portion 631 in which the lead connection portion 71 is fitted, as shown in FIG. 7. The upper surface of the recess 631 is the lower surface of the lead connecting portion 71 and is in close contact with the portion on the rear side Y2 with respect to each insertion hole 711.
Further, a step portion 64 recessed to the lower side Z2 is formed on the rear side Y2 of the support portion 63 and on the front side Y1 of the upper surface of the upper wall portion 62 of the resin sealing member 60. The width of the step portion 64 in the left-right direction is substantially equal to that of the support portion 63 described above, and the upper surface of the step portion 64 is higher than the upper surface of the lead connecting portion 71.
A protrusion 641 for locking a case member 75, which will be described later, is provided at the center of the upper surface of the step portion 64 in the left-right direction in a state of protruding to the upper side Z1. Further, screw holes 642 into which set screws 79 for fixing the case member 75 to the resin sealing member 60 are screwed are formed at both ends in the left-right direction on the upper surface of the step portion 64.

8 is a perspective view of the case member 75, and FIG. 9 is a perspective view in which a part of the pump device 10 including the case member 75 is cut away.
As shown in FIG. 8, the case member 75 includes a main body portion 76 surrounding the lead connecting portion 71, a rearward extending portion 77 extending from the upper portion of the main body portion 76 to the rear side Y2, and the main body portion 76. And a support portion 78 for the lead wire 72 provided on the upper front surface side. In the case member 75, a main body portion 76, a rearward extending portion 77, and a supporting portion 78 are integrally formed by resin molding.
A first mounting structure and a second mounting structure are provided between the case member 75 and the resin sealing member 60, and the case member 75 is mounted on the resin sealing member 60 by these mounting structures. ing.

The main body portion 76 has a front surface portion 761, left and right side surface portions 762 and 763, and a bottom surface portion 764, and has a box shape in which the upper side Z1 and the rear side Y2 are opened.
Then, when the case member 75 is attached to the resin sealing member 60, the main body portion 76 is in a state in which the lead connecting portion 71 and the support portion 63 are housed inside. At this time, the left and right side surfaces 762 and 763 of the main body portion 76 are in close contact with the left and right side surface portions of the support portion 63, and the bottom surface portion 764 is in close contact with the bottom surface portion of the support portion 63. The front surface portion 761 faces the front surface portions of the lead connecting portion 71 and the support portion 63.

With the case member 75 attached to the front surface portion of the resin sealing member 60, the main body portion 76 surrounds the lead connecting portion 71 and the support portion 63 from the front, rear, left and right sides and the lower side Z2, and only the upper side Z1 is opened. It has the form of a container. Then, inside the main body portion 76, an adhesive 767 as a sealing material is filled to a height at which the lead connection portion 71 and the upper ends of the conductors 721 of the lead wires 72 are completely submerged. That is, the main body portion 76 functions as a storage portion filled with the sealing material.
The adhesive 767 is preferably watertight, and in that case, it is possible to obtain the waterproof and dustproof effect of the entire lead connecting portion 71 including the conductor 721 of each lead wire 72 and each connecting surface 712 of the circuit board 70. is there.
Further, it is desirable that the adhesive 767 has a curability, and in that case, the conductor 721 of the lead wire 72 connected to the lead connecting portion 71 can be protected from an external impact or the like.

At the rear end portion of the bottom surface portion 764 of the main body portion 76, four insertion portions 766 for passing the four lead wires 72 connected to the lead connection portions 71 to the outside of the main body portion 76 of the case member 75 are formed. ..
Each of the insertion portions 766 is a substantially U-shaped notch formed at the rear end portion of the bottom surface portion 764, and each of the insertion portions 766 has a shape that opens toward the rear side Y2.
The case member 75 is attached so that the support member 63 and the lead connection portion 71 are housed inside the main body portion 76 from the front side Y1 toward the rear side Y2. At this time, since each insertion portion 766 has a structure opening toward the rear side Y2, each lead wire 72 connected to the lead connection portion 71 can be easily introduced inside thereof. For example, the insertion portion 766 can be formed by a through hole that vertically penetrates the bottom surface portion 764, but in that case, the work of inserting each lead wire 72 into each through hole is essential. Therefore, the insertion portion 766 that opens toward the rear side Y2 can improve workability when attaching the case member 75.

The width of each of the insertion portions 766 is substantially equal to the outer diameter of the lead wire 72, and the support portion 63 has a structure to be inserted slightly inside the main body portion 76. The part 766 and the front surface of the support part 63 can be restrained from the front, back, left and right.

The first mounting structure and the second mounting structure will be described.
The first attachment structure portion includes a protrusion 765 (see FIG. 8) as two protrusions formed on the left and right sides of the upper surface rear end portion of the bottom surface portion 764 of the main body portion 76 of the case member 75 and the resin sealing member. The support structure 60 has a fitting structure formed by concavity and convexity with insertion holes 632 (see FIG. 4) as two recesses formed on the left and right sides of the bottom surface of the support portion 63.
When attaching the case member 75 to the resin sealing member 60, the first attaching structure portion moves the case member 75 to the upper side Z1 and inserts the two protruding portions 765 into the two insertion holes 632 individually. Are connected by.

In addition, the second mounting structure portion includes an insertion hole 771 (see FIG. 8) as a recess formed vertically through the center portion of the rear extension 77 of the case member 75 in the left-right direction, and the resin sealing member 60.
The projection 641 (see FIG. 3) as a projection formed in the central portion in the left-right direction on the upper surface of the stepped portion 64 has a fitting structure by unevenness.
When the case member 75 is attached to the resin sealing member 60, the second attachment structure portion is connected by moving the case member 75 to the lower side Z2 and inserting the protrusion 641 into the insertion hole 771.

The first mounting structure is arranged on the lower side Z2 with respect to the second mounting structure. Further, since the first mounting structure moves the case member 75 to the upper side Z1 and is connected, and the second mounting structure moves the case member 75 to the lower side Z2 and is connected, the fitting of the case member 75 is performed. The operation directions are opposite to each other.
Therefore, by extending the case member 75 up and down due to its flexibility and then returning it, the first mounting structure portion and the second mounting structure portion are fitted to each other and the case member 75 is resin-sealed. It can be attached to the member 60.
In this way, the case member 75 can be attached by a simple operation, so that the workability during manufacturing can be improved.
Two through holes 772 (see FIG. 8) through which the setscrews 79 are inserted are formed at both left and right ends of the rearward extension portion 77 of the case member 75, and the first attachment structure portion and the second attachment structure portion In addition to the mounting by the mounting structure portion, the case member 75 can be fixed by the set screw 79, and the case member 75 can be prevented from falling off.

The support portion 78 of the case member 75 has a function of supporting the lead wires 72, which are passed from the insertion portions 766 to the outside of the main body portion 76, in a state of being folded back to the front side Y1 by the insertion portions 766.
That is, as shown in FIGS. 5 and 9, the support portion 78 extends from the upper left end of the front surface portion 761 of the main body portion 76 toward the right side X2, and is provided between the support portion 78 and the front surface portion 761. A gap for holding each lead wire 72 is formed.
Since the support portion 78 has a cantilever structure, the lead wires 72 can be pushed into the gap from the right side X2. In addition, since the barb projecting to the rear side Y2 is formed at the extending end of the support portion 78, the supporting lead wire 72 can be held so as not to easily come out from the gap to the outside. ..

[Operation of pump device]
In the pump device 10 having the above-described configuration, the outer ends of the lead wires 72 are connected to a power source outside the device, so that the plurality of coils 54 of the motor 30 are arranged in a predetermined order through the circuit board 70. Power is supplied and the rotor 40 rotates.
Along with this, the impeller 23 of the pump mechanism unit 20 rotates, the fluid flows in the pump chamber 22 in the circumferential direction around the axis L, and the fluid is sucked into the pump chamber 22 from the fluid suction port 213. The fluid sucked from the fluid discharge port 214 is discharged.

[Technical effects of embodiments of the invention]
In the pump device 10, since the lead connecting portion 71 of the circuit board 70 is embedded in the resin sealing member 60 in a state of protruding to the outside, the lead wire 72 is connected without providing the circuit board 70 with a connector or the like. Therefore, it is possible to reduce the number of parts and facilitate the manufacturing work.

In addition, the lead connecting portion 71 is provided with a connecting surface 712 for connecting the conductor 721 of the lead wire 72 to facilitate the connection of the lead wire 72 with solder, brazing material or the like.
Further, since the lead connecting portion 71 is provided with the insertion hole 711 of the conductor 721 of the lead wire 72, the conductor 721 of the lead wire 72 can be attached at an appropriate position, and the connection strength can be maintained high. It is possible.

Further, since the pump device 10 includes the lead wire 72 connected to the lead connecting portion 71, the pump device 10 can be easily connected to an external power source or the like.
In this case, it is possible to connect a connector to the tip portion of the lead wire 72 extending to the outside of the pump device 10 and connect it to another device such as an external power source. Since the pump device 10 does not have a structure in which a connector is provided on the circuit board 70, the connector is not embedded in the resin sealing member 60. Therefore, a connector that meets the standards of the other device to be connected should be selected and connected. Is possible.

Further, since the pump device 10 includes the case member 75 that surrounds the periphery of the lead connecting portion 71, the lead connecting portion 71 projecting from the resin sealing member 60 to the outside can be protected from an external impact or the like. It is possible to reduce the occurrence of damage and the like.

The inside of the main body portion 76 of the case member 75 has a structure as a storage portion, and stores an adhesive 767 as a sealing material. Since the adhesive 767 seals the lead connection portion 71 and the conductor 721 of each of the connected lead wires 72, it is possible to avoid their exposure and obtain a waterproof and dustproof effect.
Further, when the adhesive 767 has curability, the sealed lead connecting portion 71 can be protected from an external impact. In particular, by restraining the conductor 721 of the lead wire 72 from the surroundings by the adhesive 767, it is possible to prevent the conductor 721 from bending and to effectively protect the conductor 721.
Further, since the main body portion 76 functions as a storage portion, the lead connection portion 71 can be kept in a state of being immersed in the adhesive 767, and high waterproofness and dustproofness can be obtained. Further, when the adhesive 767 has curability, it is possible to protect the lead connecting portion 71 against impacts from all directions.

Further, since the case member 75 has the insertion portion 766 that allows the lead wire 72 to pass through and is passed through the outside of the main body portion 76, the lead wire 72 can be prevented from swinging, and is connected to the lead connecting portion 71 due to repeated swinging. The breakage of the conductor 721 can be suppressed, and the lead wire 72 can be effectively protected.
Further, since the insertion portion 766 is formed by a notch opened to the resin sealing member 60 side, the lead wire 72 can be easily passed through the insertion portion 766 when the case member 75 is attached, and the device It is possible to improve workability during manufacturing.

Further, since the case member 75 has the support portion 78 that supports the lead wire 72 that has been passed through the outside of the main body portion 76 in the folded state at the insertion portion 766, allow the folded portion of the lead wire 72 to have an extra length. Even when the lead wire 72 is pulled from the outside, the tension transmitted to the lead connecting portion 71 side can be relaxed and the conductor 721 connected to the lead connecting portion 71 can be protected.
Further, since the supporting portion 78 has a cantilever structure and is open at the extended end side, the lead wire 72 can be easily pushed into the inside of the supporting portion 78 and supported.

Further, since the case member 75 is attached to the resin sealing member 60 by the first attachment structure portion and the second attachment structure portion whose fitting operation directions of the case member 75 are opposite to each other, It can be attached to the resin sealing member 60 by extension, and the work of attaching the case member 75 at the time of manufacturing the device can be easily performed.
In addition, since the first mounting structure part and the second mounting structure part have the fitting structure formed by the concavities and convexities, the case member 75 can be mounted with a simple structure.

Further, since the metal member 90 provided on the upper end of the resin sealing member 60 has a structure that shields the entire lead connecting portion 71 when viewed from above, the lead is prevented from collision with other objects from above. It is possible to effectively protect the connecting portion 71.
In particular, since the upper opening of the case member 75 and the metal member 90 are arranged so as to face each other, the metal member 90 protects against a shock from a direction in which the case member 75 cannot protect the lead connecting portion 71. The connection part 71 can be protected from all directions.

[Other]
In addition, the details shown in the embodiments can be appropriately changed without departing from the spirit of the invention.
For example, the sealing material with which the case member 75 is filled is not limited to an adhesive, and may be a waterproof or dustproof filler. In that case, if the filler is not curable, a lid may be attached to the upper opening of the main body 76 of the case member 75.

Further, the case member 75 has a structure in which the first mounting structure part and the second mounting structure part are fitted and connected by being stretched up and down based on flexibility and then returned. However, it is not limited to this.
For example, the case member 75 has a structure in which the first mounting structure part and the second mounting structure part are fitted and connected by being compressed up and down based on flexibility and then returned. Good.
Further, the first attachment structure portion and the second attachment structure portion may be provided at the left and right ends of the case member 75, and may be connected by expansion and contraction in the left-right direction.
Further, the case member 75 may be attached by utilizing the flexibility of the resin sealing member 60 without utilizing the flexibility of the case member 75.

10 pump device 20 pump mechanism part 21 case body 22 pump chamber 23 impeller 30 motor 40 rotor 41 rotating shaft 42 magnet 50 stator 51 stator core 52 insulator 53 insulator 54 coil 60 resin sealing member 632 insertion hole (recess)
641 Protrusion (convex)
70 Circuit Board 71 Lead Connection 711 Insertion Hole 712 Connection Surface 72 Lead Wire 721 Conductor 75 Case Member 76 Main Body (Reservoir)
765 Protrusion (convex)
766 Insertion part 767 Adhesive (sealing material)
77 Rear extension 771 Insertion hole (recess)
772 Through hole 78 Support portion 80 Separation plate 90 Metal member L axis

Claims (12)

Rotor and
A stator arranged around the rotor,
A resin sealing member covering the stator,
A circuit board connected to the coil of the stator,
The circuit board has a lead connection portion for electrically connecting a conductor of a lead wire to the circuit board,
The pump device, wherein the circuit board is embedded in the resin sealing member in a state in which the lead connecting portion projects to the outside. The pump device according to claim 1, wherein the lead connecting portion has a connecting surface for connecting the conductor of the lead wire. The pump device according to claim 2, wherein the lead connecting portion has an insertion hole for a conductor of the lead wire that penetrates the circuit board. The pump device according to any one of claims 1 to 3, further comprising the lead wire connected to the lead connection portion. The pump device according to claim 4, further comprising a case member that surrounds the periphery of the lead connecting portion that protrudes from the resin sealing member. The pump device according to claim 5, wherein a sealing material that covers the exposed conductors of the lead connection portion and the lead wire is enclosed inside the case member. The pump device according to claim 6, wherein the sealing material is an adhesive. The pump device according to claim 6 or 7, wherein the case member has a storage portion for the sealing material inside. The pump device according to any one of claims 5 to 8, wherein the case member has an insertion portion that passes through the outside of the case member while restraining the lead wire. The pump device according to claim 9, wherein the case member has a support portion that supports the lead wire that is passed from the insertion portion to the outside in a state of being folded back by the insertion portion. Between the case member and the resin sealing member, a first mounting structure part and a second mounting structure part for mounting the case member to the resin sealing member,
Each of the first mounting structure and the second mounting structure is a fitting structure with a recess and a protrusion,
The moving direction of the case member when fitting the concave portion and the convex portion of the first mounting structure portion and the moving direction of the case member when fitting the concave portion and the convex portion of the second mounting structure portion The pump device according to any one of claims 5 to 10, wherein the moving directions of the case members are opposite to each other. A metal member is provided at one end of the resin sealing member in the axial direction of the rotor,
12. The metal member shields the lead connecting portion protruding from the resin sealing member when viewed from the metal member side in the axial direction of the rotor, as claimed in any one of claims 1 to 11. The pump device according to the item.

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