CN211778044U - Pump device - Google Patents

Abstract

The utility model provides a pump device, which aims to improve the pressure resistance of the device. The pump device includes: an impeller (23); a rotor (40) connected to the impeller; a stator (50) arranged around the rotor; a resin sealing member (60) covering the stator; The metal member (90) of the contact surface has a plurality of protrusions (93) extending from the outer edge portion of the contact surface to the resin sealing member side, and a portion of the plurality of protrusions on the central portion side of the contact surface is The resin sealing members face each other. Each protruding portion (93) has a function of suppressing expansion deformation of the resin sealing member (60).

Description

pump unit

technical field

The utility model relates to a pump device integrated with an electric motor.

Background technique

A conventional pump device integrated with a motor includes, for example, a pump casing, an impeller, a rotor, a stator, a circuit board, and the like.

Furthermore, when the fluid to be sucked and discharged is a liquid such as water, the stator of the motor and the circuit board are sealed with a resin molded body in order to ensure watertightness with the liquid in the pump chamber. A rotor is arranged inside the stator, and the rotor is connected to an impeller arranged in a pump chamber of the pump casing.

The pump casing 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).

prior art literature

Patent Literature

Patent Document 1: Japanese Patent Laid-Open No. 2018-166365

Utility model content

The technical problem to be solved by the utility model

In recent years, pump devices are required to have high pressure resistance.

For example, in the case of suction and discharge of liquid in an environment where a pressure reducer cannot be used, if the flow of the liquid is suddenly blocked on the downstream side of the pump device, a water hammer phenomenon occurs, and high pressure is applied to the pump device. pump room.

In this case, the resin molded body made of resin is deformed by the pressure and may be damaged.

The purpose of the utility model is to improve the pressure resistance of the device.

Technical solutions adopted to solve technical problems

In order to solve the above technical problems, the present invention provides a pump device, which is characterized in that the pump device includes: an impeller; a rotor connected to the impeller; a stator arranged around the rotor; a resin sealing member , which covers the stator; and a metal member which has a contact surface that is in contact with the surface of the resin sealing member, the metal member having a plurality of extending from the outer edge portion of the contact surface to the resin sealing member side A plurality of protruding parts are provided, and a portion of the plurality of protruding parts on the center portion side of the contact surface faces the resin sealing member.

In the pump device of the present invention, the portion on the center portion side of the contact surface of the plurality of protrusions extending from the outer edge portion of the contact surface of the metal member toward the resin seal member faces the resin seal member.

Pressure is applied to the resin sealing member by the pressure of a water hammer phenomenon or the like, and a stress that causes the resin sealing member to deform to expand outward with respect to the contact surface of the metal member is applied.

However, since the portions on the center portion side of the contact surface of each protruding portion face the resin sealing member, even if the resin sealing member swells, the resin sealing member abuts each protruding portion to suppress the swelling. Therefore, deformation and damage of the resin sealing member due to expansion of the resin sealing member can be suppressed, and deformation of the contact surface of the metal member can also be suppressed.

Therefore, the pressure resistance of the pump device can be improved.

In the pump device of the present invention, a portion of the plurality of protruding portions on the center portion side of the contact surface is in contact with the resin sealing member.

In the pump device of the present invention, the expansion of the resin sealing member can be effectively suppressed by making the portions on the center portion side of the contact surface of each protruding portion abut against the resin sealing member.

In the pump device of the present invention, it is characterized in that:

A part or all of the protruding parts are attached to the resin sealing member by screws passing through the inside of the protruding parts and along the extending direction of the protruding parts.

In the pump device of the present invention, since some or all of the protrusions are attached to the resin sealing member by screws along the extending direction of the protrusions, deflection of these protrusions is suppressed by the screws. Accordingly, the expansion deformation of the metal member is also suppressed, and the deformation of the resin sealing member can be suppressed more effectively.

The pump device of the present invention is characterized by comprising: a casing that accommodates the impeller to form a pump chamber; and a partition member that isolates the resin seal member from fluid in the pump chamber, The casing, the partition member, the resin sealing member, and the metal member are sequentially arranged along the axial direction of the rotor; the casing, the partition member, and the resin sealing member are connected by the screws. and the metal parts.

In the pump device of the present invention, since the casing, the partition member, the resin sealing member, and the metal member are connected by screws, the number of parts can be reduced compared with the case where each member is connected separately.

In the pump device of the present invention, a screw hole is formed in the protruding portion.

In the pump device of the present invention, the screw hole is formed to penetrate to the side opposite to the resin sealing member of the metal member.

In the pump device of the present invention, since the screw hole is formed through the metal member to the side opposite to the resin sealing member, the pump device can be fixedly attached to other external structures by utilizing the portion of the screw hole that the screw does not reach. . In this way, the number of screw holes for attaching the pump device can be reduced, the man-hours at the time of manufacture can be reduced, and the reduction in strength due to the formation of other screw holes can be reduced.

In the pump device of the present invention, a reinforcing rib is provided on the side opposite to the resin sealing member of the metal member.

Since the pump device of the present invention has a reinforcing rib on the side opposite to the resin sealing member of the metal member, deformation of the contact surface of the metal member that expands outward can be suppressed, and deformation of the resin sealing member can be further suppressed.

The pump device of the present invention includes a circuit board sealed by the resin sealing member, and the circuit board is disposed on a side closer to the metal member than the stator.

In the pump device of the present invention, since the circuit board is arranged on the side closer to the metal member than the stator in the resin sealing member, the heat generated from the stator and the circuit board is transferred to the metal member and dissipated, so that the circuit board can be cooled and protected. It is protected from heat.

Utility model effect

In the pump device of the present invention, a portion on the center portion side of the contact surface of the plurality of protrusions extending from the outer edge portion of the contact surface of the metal member toward the resin seal member faces the resin seal member.

Pressure is applied to the resin sealing member by pressure such as a water hammer phenomenon, and a stress that expands and deforms the contact surface of the resin sealing member with respect to the metal member is applied to the outside.

However, since the portions on the center portion side of the contact surface of each protruding portion face the resin sealing member, even if the resin sealing member swells, the resin sealing member abuts each protruding portion to suppress the swelling. Therefore, even if the extension end portion is deflected in the direction of falling toward the center portion of the contact surface, each protruding portion abuts the resin sealing member and is pushed back, thereby suppressing the deflection of the extension end portion. Therefore, deformation and damage of the resin sealing member due to expansion of the resin sealing member can be suppressed, and deformation of the contact surface of the metal member can also be suppressed.

Therefore, the pressure resistance of the pump device can be improved.

Description of drawings

FIG. 1 is a perspective view of a pump device according to an embodiment of the present invention.

Fig. 2 is a longitudinal sectional view of the pump device along an axis passing through the center of the rotor.

Fig. 3 is a perspective view of the metal member viewed from obliquely above.

Fig. 4 is a perspective view of the metal member viewed from obliquely below.

5 is an axial vertical cross-sectional view of the pump device showing a cross-section perpendicular to the axis passing through the protrusion.

6 is a partial axial cross-sectional view of the pump device showing a cross-section through the center of the screw hole.

Description of reference numerals

10 Pump unit

20 Pump Mechanism Department

21 Housing

22 Pump room

23 Impeller

24 Columnar part

30 Motors

40 rotors

41 Rotary axis

50 Stator

54 Coils

60 Resin sealing parts

65 Columnar part

66 Recess

70 circuit board

80 Separation plate (partition part)

86 Round part

90 Metal Parts

91 main body

92 annular rib

93 Protrusions

94 screws

96 taps

241, 861, 651 through hole

L axis

Detailed ways

[Outline of Embodiment]

As an embodiment of the present invention, the 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 longitudinal cross-sectional view of the pump device 10 along an axis L passing through the center of a rotor 40 (described later).

The pump device 10 is suitable for applications in which the target fluid to be sucked and discharged is a liquid, for example, mounted on a water heater, washing machine, dishwasher, etc., connected to a tap water pipe, and used to supply tap water to a parent device.

It should be noted that, 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 simply defined as the “upper” side Z1 of the device, and the reverse The direction is defined as the "down" side Z2. In addition, let the direction orthogonal to the axis L be the horizontal direction. The horizontal direction, that is, the direction in which the lead connection portion 71 of the circuit board 70 described later extends is referred to as the "front" side Y1 of the device, and the opposite direction is referred to as the "rear" side Y2. In addition, when the pump device 10 is viewed from the lead wire connection portion 71 side, the left side is referred to as the "left" side X1 of the device, and the opposite direction is referred to as the "right" side X2.

The pump device 10 includes a pump mechanism portion 20 for sucking and discharging fluid, and a motor 30 serving as a drive source thereof, and these are formed as an integrated structure.

Furthermore, the pump mechanism part 20 mainly includes a casing 21 forming a pump chamber 22 inside, and an impeller 23 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; The separation plate 80 of the partition member for fluid isolation inside; the metal member 90 provided on the upper end surface of the resin sealing member 60 .

[Pump Mechanism Department]

As shown in FIGS. 1 and 2 , the casing 21 of the pump mechanism portion 20 includes a substantially cylindrical peripheral wall portion 211 centered on the axis L, and a bottom plate portion 212 that closes the lower end of the peripheral wall portion 211 . Furthermore, the upper end portion of the peripheral wall portion 211 is connected to the lower end portion of the resin sealing member 60 of the electric motor 30 via the separation plate 80 .

In addition, the shape of the cross section perpendicular to the axis L of the peripheral wall portion 211 is substantially circular, and the shape of the cross section perpendicular to the axis L of the resin sealing member 60 is also substantially circular. Also, the peripheral wall portion 211 and the resin sealing member 60 are concentrically connected.

A tubular fluid intake port 213 extending downward Z2 is formed in the center of the bottom plate portion 212 . In addition, a tubular fluid discharge port 214 is formed on the outer periphery of the peripheral wall portion 211 .

The fluid suction port 213 is formed at the center of the bottom plate portion 212 to be concentric with the peripheral wall portion 211 .

On the other hand, the fluid discharge port 214 extends in a horizontal direction parallel to the tangential direction of the circular peripheral wall portion 211 in plan view.

Both the fluid suction port 213 and the fluid discharge port 214 described above communicate with the pump chamber 22 , which is the inner space of the casing 21 .

In the center of the inside of the housing 21, a cylindrical first rotor support portion 215 is provided centered on the axis L, which will be described later. The first rotor support portion 215 is opened toward the upper side Z1, and the lower end portion of the rotating shaft 41 of the rotor 40 is inserted and supported therein.

The first rotor support portion 215 is located just above the fluid suction port 213 and on the path of the fluid flowing in from the fluid suction port 213 . However, since it is supported by the three blade-like legs (one is omitted in the figure) 216 erected on the upper surface of the bottom plate portion 212, the fluid can pass between the legs 216 without hindering the inflow of the fluid. .

As described above, in the center of the pump chamber 22, the impeller 23 is arranged with the axis L as the center of rotation. The impeller 23 includes a circular rotating plate 232 with a central opening, and a plurality of helical blades 231 erected on the upper surface of the rotating plate 232 .

The first rotor support portion 215 and the leg portion 216 described above are loosely inserted into the central opening of the rotating plate 232 .

The upper end of each blade 231 of the impeller 23 is fixedly connected to the lower end of the rotor 40 .

Then, by the drive of the motor 30 , the impeller 23 rotates around the axis L together with the rotor 40 , and the fluid in the pump chamber 22 flows in the rotation direction through the plurality of blades 231 . Thereby, centrifugal force is generated in the fluid, the radially inner side is at a low pressure, and the radially outer side is at a high pressure, the fluid is sucked from the fluid suction port 213 and the fluid is discharged from the fluid discharge port 214 .

[Motor: Resin Sealed Parts and Separation Plates]

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 constituting the resin sealing member 60 are integrally molded from BMC (Bulk Molding Compound), which is a thermosetting resin material.

The upper surface of the upper wall portion 62 is flat and horizontal, and the metal member 90 is mounted thereon.

Moreover, in the upper wall part 62, most of the substantially circular circuit board 70 whose outer diameter is slightly smaller than this upper wall part 62 is embedded in a horizontal state.

The peripheral wall portion 61 is formed in a state in which the substantially entire configuration of the stator 50 is sealed inside with resin.

The peripheral wall portion 61 is opened downward, and the above-described case 21 is attached via the separation plate 80 so as to close the opening portion.

The rotor 40 is arranged in the inner space of the peripheral wall portion 61 . Furthermore, the inner space of the peripheral wall portion 61 communicates with the pump chamber 22 of the casing 21 . However, in this state, since 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 , a sealing fluid is provided between the resin sealing member 60 and the case 21 . the separation plate 80.

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 ; The top part 83 which is in close contact with the lower surface; the annular bulging part 84 which is located between the flange part 81 and the cylindrical part 82 and bulges out to the lower side Z2.

The flange portion 81 , the cylindrical portion 82 , the top portion 83 , and the bulging portion 84 of the separation plate 80 are integrally formed with a resin material without joints, and all of them have the function of blocking fluid.

The flange portion 81 is sandwiched between the lower end face of the peripheral wall portion 61 of the resin sealing member 60 and the upper end face of the peripheral wall portion 211 of the housing 21 and seals therebetween.

The bulging portion 84 is bulged and fitted inside the upper end portion of the peripheral wall portion 211 of the casing 21 . Furthermore, an O-ring 841 as a sealing material is provided between the outer periphery of the bulging portion 84 and the inner periphery of the peripheral wall portion 211 , and fluid sealing is also achieved by this O-ring 841 .

Inside the cylindrical portion 82, the rotor 40 is arranged with a gap therebetween. In addition, 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 top portion 83, a cylindrical second rotor support portion 85 centered on the axis L is arranged. The second rotor support portion 85 is opened toward the lower side Z2, and the upper end portion of the rotating shaft 41 of the rotor 40 is inserted and supported therein.

The second rotor support portion 85 is integrally formed with the top portion 83 from the same resin material as the top portion 83 .

[Motor: Rotor]

As shown in FIG. 2 , the rotor 40 includes: a rotating shaft 41 arranged in the vertical direction around the axis L; a magnet 42 provided on the outer periphery of the rotating shaft 41; Holding member 43 .

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

The holding member 43 includes a cylindrical portion 431 that holds the magnet 42 at the upper portion, and includes a circular flange portion 432 at the lower portion.

The flange portion 432 is a disk having substantially the same diameter as the impeller 23 , and the impeller 23 is fixedly supported on the lower surface side thereof.

An annular magnet 42 is held on the outer periphery of the cylindrical portion 431 so as to be concentric with the rotating shaft 41 . Moreover, the cylindrical part 431 is equipped with the sleeve 44 inside, and this sleeve 44 is a sliding bearing. Therefore, the holding member 43 can rotate integrally with the magnet 42 and the impeller 23 around the rotation shaft 41 .

In addition, the cylindrical portion 431 is formed with enlarged diameter portions 431a and 431b on the inner sides of the lower end portion and the upper end portion, respectively. The above-described first rotor support portion 215 is loosely inserted inside the lower enlarged diameter portion 431a, and the aforementioned second rotor support portion 85 is loosely inserted inside the upper enlarged diameter portion 431b.

These enlarged diameter portions 431 a and 431 b allow the first rotor support portion 215 and the second rotor support portion 85 to be disposed inside the cylindrical portion 431 , and to reduce the size of the pump device 10 in the vertical direction.

As described above, the magnet 42 is annular, and on the outer periphery thereof, N poles and S poles are alternately magnetized in the circumferential direction.

[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 the cylindrical portion 82 of the separator 80 ; A plurality of coils 54 on the core 51 .

The stator core 51 is formed of a magnetic material, and includes 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. The respective salient pole portions 512 are formed at equal angular intervals in the circumferential direction with the axis L as the center. The extending end portion of each salient pole portion 512 is provided with an opposing portion 513 extending in the circumferential direction with the axis L as the center. The opposing 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 therebetween.

The upper and lower insulators 52 and 53 are formed of an insulating material such as resin, form a pair of upper and lower portions, and cover the salient pole portion 512 of the stator core 51 and its surroundings.

The insulator 52 of the upper side Z1 includes: a main body part 521 , which is a cylindrical body covering both halves of the upper half of the salient pole part 512 ; and an outer flange part 522 covering the upper half of the inner peripheral surface of the annular part 511 ; Cover the inner flange portion 523 of the upper half of the outer peripheral surface of the opposing portion 513 .

The insulator 53 on the lower side Z2 includes: a main body portion 531 , which is a cylindrical body that covers both halves of the lower half of the salient pole portion 512 , and an outer flange portion 532 that covers the lower half of the inner peripheral surface of the annular portion 511 ; Cover the inner flange portion 533 of the lower half of the outer peripheral surface of the opposing portion 513 .

It should be noted that, like the upper and lower insulators 52 and 53 , a configuration in which the periphery of each salient pole portion 512 of the stator iron core 51 is covered by the upper and lower half structures is exemplified. In the insert molding, the insulator and the stator core 51 are integrally molded.

The coil 54 is made of a lead wire made of an aluminum alloy or a copper alloy, and 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 respectively formed on the nine salient pole portions 512 are composed of three U-phase coils, three V-phase coils, and three W-phase coils.

[motor: circuit board]

The circuit substrate 70 is provided with a Hall element that detects the rotational position of the rotor 40 .

In addition, the circuit board 70 is connected to the lead wires of the coils 54 of the stator 50 described above, and forms a circuit for controlling the current flowing through the coils 54 in accordance with the rotational position of the rotor 40 detected by the Hall element.

The circuit board 70 is circular in overall shape in plan view (shape viewed from the direction of the axis L), is sealed near the upper end of the resin sealing member 60 , and is provided at a position closer to the metal member 90 than the stator 50 .

The lead connection part 71 for connecting the lead wire 72 for connection with the power supply circuit etc. outside the machine extends radially outward from the circuit board 70 .

The lead connection portion 71 protrudes to the outside from the vicinity of the upper end portion of the front side Y1 of the resin sealing member 60 , and the lead wire 72 is connected to the outside of the resin sealing member 60 .

The case member 75 is attached to the upper end part of the front side Y1 of the resin sealing member 60, and surrounds the lead wire connection part 71 which protrudes to the outside, and protects it.

[motor: metal parts]

FIG. 3 is a perspective view in which the upper surface of the metal member 90 can be seen, and FIG. 4 is a perspective view in which the lower surface can be seen.

As described above, the metal member 90 is a reinforcing member provided on the upper surface of the resin sealing member 60 .

The metal member 90 includes: a disc-shaped main body portion 91 whose lower surface is a contact surface and is in close contact with the upper surface (surface) of the resin sealing member 60; an annular rib 92 formed on the outer peripheral portion of the upper surface of the main body portion 91; Four protrusions 93 (only two are shown in FIG. 1 ) are provided on the outer peripheral portion of the lower surface of the main body portion 91 at uniform intervals in the circumferential direction. In the metal member 90 , the main body portion 91 , the annular rib 92 , and the protruding portion 93 are integrally formed from a metal material, for example, by aluminum die casting.

The annular rib 92 is a ridge having a rectangular cross section, and is formed in an annular shape along the outer periphery of the main body portion 91 . The annular rib 92 is wider than the thickness of the main body portion 91 in both the radial direction and the axial direction of the cross section, provides high rigidity to the flat main body portion 91 and effectively suppresses the deflection of the main body portion 91 Or the protrusions and depressions of the central portion of the main body portion 91 .

The protruding portion 93 is a columnar shape protruding from the lower surface outer peripheral portion of the main body portion 91 to the lower side Z2, and a screw hole 96 penetrating the center is formed. The protrusion 93 and the screw hole 96 are parallel to the axis L. As shown in FIG. Further, the screw hole 96 penetrates from the lower end surface of the protruding portion 93 to the upper end surface of the annular rib 92 , and a screw groove is formed inside the entire length of the screw hole 96 . Screws 94 for fixing the metal member 90 to the resin sealing member 60 are screwed into the screw holes 96 .

In addition, on the outer peripheral portion of the lower surface of the metal member 90 , four protruding portions 93 and screw holes 96 are formed in the circumferential direction at intervals of 90°.

FIG. 5 is an axial vertical sectional view of the pump device 10 showing a section perpendicular to the axis L passing through the protrusion 93 , and FIG. 6 is a partial axial sectional view of the pump device 10 showing a section through the center of the screw hole 96 .

As shown in FIG. 5 , the center of each protruding portion 93 is located slightly radially outward of the outer periphery of the resin sealing member 60 . On the other hand, the upper end portion of the outer periphery of the resin sealing member 60 is formed with recessed portions 66 at four locations in the circumferential direction. ) is recessed in an arc shape so that a part of it faces each other.

The inner peripheral surface of the recessed portion 66 is opposed to the center side portion of the resin sealing member 60 on the outer peripheral surface of each protruding portion 93 , thereby suppressing the lower end of each protruding portion 93 from being skewed toward the center side of the resin sealing member 60 .

In addition, a part of the center side (axis line L side) of the resin sealing member 60 on the outer peripheral surface of each protruding part 93 may be in a state of contacting each recessed part 66 . In addition, even when they are not in contact with each other, it is preferable to be closer to each other.

In addition, four columnar parts 65 are formed on the lower end surface of each protruding part 93 at the position of the lower side Z2 , and the four columnar parts 65 are formed integrally with the resin sealing member 60 on the outer peripheral surface of the resin sealing member 60 . Each columnar portion 65 has a cylindrical shape having an outer diameter substantially equal to that of the protruding portion 93 , and a through hole 651 concentric with the screw hole 96 of the protruding portion 93 is formed. The inner diameter of the through hole 651 is slightly larger than that of the screw hole 96, and the screw 94 can be inserted thereinto.

In addition, four circular portions 86 are formed on the lower end surface of each columnar portion 65 of the resin sealing member 60 at a position that becomes the lower side Z2 , and these four circular portions 86 are formed on the outer periphery of the flange portion 81 of the separation plate 80 . The surface is integrally formed with the flange portion 81 . Each circular portion 86 is in the shape of a disk having an outer diameter substantially equal to that of the columnar portion 65 , and a through hole 861 having the same diameter and concentricity as the through hole 651 is formed.

In addition, four columnar portions 24 are formed at the lower end surface of each circular portion 86 of the separation plate 80 at the position of the lower side Z2. The portion 211 is integrally formed. Each columnar portion 24 has a cylindrical shape having an outer diameter substantially equal to that of the circular portion 86 , and has a through hole 241 concentric with the through hole 861 and having the same diameter.

Along the direction of the axis L, the metal member 90 , the resin sealing member 60 , the separation plate 80 , and the case 21 are arranged in this order from the upper side toward the lower side Z2 . Then, screws 94 are inserted from the lower ends of the through holes 241 of the housing 21 toward the upper side Z1 , and the upper ends of the screws 94 are screwed into the screw holes 96 of the protruding portions 93 through the through holes 241 , 861 , and 651 . The metal member 90 , the resin sealing member 60 , the partition plate 80 , and the case 21 are pressed in the direction of the axis L by the coupling of the respective screws 94 , and are closely connected with no gaps therebetween.

Each screw 94 is set so that the length of each screw hole 94 does not reach the middle portion in the axial direction of each screw hole 96 in the coupled state.

Therefore, each screw hole 96 has a room to open from its upper end to about half of its depth.

The unused portion from the upper end of each screw hole 96 to about half of the depth may be used as a mounting hole for mounting the pump device 10 to an external installation site or the like.

[Operation of the 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 or the like outside the device, and the plurality of coils 54 of the motor 30 are energized in a predetermined order through the circuit board 70 to rotate the rotor 40 .

As a result, the impeller 23 of the pump mechanism 20 rotates, and the fluid flows in the pump chamber 22 in the circumferential direction centered on the axis L, and the fluid is sucked into the pump chamber 22 from the fluid suction port 213 and sucked into the pump chamber 22 from the fluid discharge port 214 fluid discharge.

[Technical Effects of Embodiments of the Utility Model]

The portion on the outer peripheral surface of the plurality of protruding portions 93 of the metal member 90 of the pump device 10 that becomes the central portion side (the axis L side) of the lower surface of the metal member 90 faces the recessed portion 66 of the resin sealing member 60 . Therefore, even when the resin sealing member 60 is pressurized upward from the inside, each protruding portion 93 is supported by the concave portion 66, and the lower end portion thereof is suppressed from being deflected toward the center side, so that the upper portion of the main body portion 91 of the metal member 90 is positioned above the metal member 90. The bulge is suppressed.

In addition, since the portion on the outer peripheral surface of each protruding portion 93 on the central portion side (the axis L side) of the lower surface of the metal member 90 faces the concave portion 66 of the resin sealing member 60, even if the resin sealing member 60 swells, the The resin sealing member 60 may be brought into contact with each protruding portion 93 to suppress expansion.

Therefore, deformation of the resin sealing member 60 is suppressed, and the pressure resistance of the pump device 10 can be improved.

In addition, in the case of a configuration in which a portion on the outer peripheral surface of the plurality of protruding portions 93 of the metal member 90 of the pump device 10 that is on the central portion side of the lower surface of the metal member 90 abuts on the concave portion 66 of the resin sealing member 60 Therefore, there is no gap between the protruding portion 93 and the recessed portion 66, and the deformation of the resin sealing member 60 can be suppressed more effectively.

In addition, since each protruding portion 93 of the metal member 90 is attached to the resin sealing member 60 by the screw 94 parallel to the axis L, the screw 94 can also suppress the deflection of each protruding portion 93 and suppress the protrusion of the main body portion 91 of the metal member 90. The expansion of the resin sealing member 60 is increased, and the deformation of the resin sealing member 60 is suppressed.

In addition, each screw 94 penetrates the casing 21 , the partition member 80 , the resin sealing member 60 , and the metal member 90 up and down and is fastened to the screw hole 96 , so that the casing 21 , the partition member 80 , the resin sealing member 60 and the metal member 90 are separated from each other. While crimping up and down, downward tension is applied to each protruding portion 93 . Therefore, the tension generated by the screw 94 also acts to suppress the deflection of each protruding portion 93 , thereby suppressing the protrusion of the main body portion 91 of the metal member 90 and suppressing the deformation of the resin sealing member 60 .

In addition, since each screw hole 96 penetrates to the upper surface of the metal member 90, the upper part of the screw hole 96 can be used as a mounting hole of the pump device 10, the number of parts for mounting can be reduced, and the manufacturing man-hour of the mounting structure can be omitted. .

Further, the upper surface of the main body 91 of the metal member 90 has the annular reinforcing annular rib 92 , thereby suppressing the expansion of the main body 91 of the metal member 90 and further suppressing the deformation of the resin sealing member 60 .

In addition, the circuit board 70 is embedded in the vicinity of the upper end surface of the resin sealing member 60 , and the metal member 90 is provided so as to face the upper end surface of the resin sealing member 60 . Therefore, the metal member 90 is disposed closer to the circuit board 70 than the stator 50 , and the heat generated from the stator 50 and the circuit board 70 is conducted to the metal member 90 , and the metal member 90 dissipates heat well due to its thermal conductivity, so that it is possible to dissipate heat from the circuit board 70 . The substrate 70 is cooled, protecting it from heat.

Moreover, since the metal member 90 is fastened with the screw 94, the adhesiveness with the resin sealing member 60 can be improved, and heat dissipation can be improved.

[other]

In addition, the details shown in the embodiment can be appropriately changed without departing from the gist of the present invention.

For example, the number of the protruding portions 93 of the metal member 90 is not limited to four and may be increased or decreased, but it is desirable to have a plurality of them. In addition, it is desirable to distribute|arrange toward the outer periphery on the lower surface of the main-body part 91.

In addition, in the case of having a plurality of protruding portions 93 , the screw holes 96 may not be provided in all the protruding portions 93 .

In addition, the metal member 90 is not limited to the screw 94, and may be attached to the resin sealing member 60 by other methods.

In addition, the metal member 90 can also effectively cool the circuit board 70 by providing a paint that radiates with high efficiency, a heat-dissipating structure, a heat-dissipating fin, or the like on the surface other than the contact surface with the resin sealing member 60 .

In addition, lubricating oil for heat dissipation may be added between the contact surface of the metal member 90 and the resin sealing member 60 to improve heat dissipation.

In addition, on the circuit board 70, heat-generating components may be exposed from the upper surface of the resin sealing member 60 and directly contact with the metal member 90, thereby improving heat dissipation.

Claims (10)

1. A pump device is characterized by comprising:

an impeller;

a rotor connected to the impeller;

a stator disposed around the rotor;

a resin sealing member covering the stator;

a metal member having a contact surface that contacts a surface of the resin sealing member,

the metal member has a plurality of protruding portions extending from an outer edge portion of the contact surface toward the resin seal member,

the resin sealing member is disposed between the plurality of projections and the resin sealing member.

2. Pump apparatus according to claim 1,

portions of the plurality of protruding portions on a central portion side of the contact surface abut against the resin seal member.

3. Pump apparatus according to claim 2,

some or all of the protruding portions are attached to the resin seal member by screws that pass through the inside of the protruding portions and along the extending direction of the protruding portions.

4. The pump device according to claim 3, characterized in that the pump device comprises:

a housing that houses the impeller and forms a pump chamber;

a partition member that isolates the resin sealing member from a fluid in the pump chamber,

the housing, the partition member, the resin sealing member, and the metal member are arranged in this order along an axial direction of the rotor,

the screw connects the housing, the partition member, the resin seal member, and the metal member.

5. The pump arrangement according to claim 4,

the protruding portion is formed with a screw hole.

6. Pump apparatus according to claim 5,

the screw hole is formed through to the side of the metal member opposite to the resin sealing member.

7. The pump arrangement according to claim 6,

the metal member has a reinforcing rib on a side opposite to the resin sealing member.

8. Pump apparatus according to claim 1,

some or all of the protruding portions are attached to the resin seal member by screws that pass through the inside of the protruding portions and along the extending direction of the protruding portions.

9. Pump apparatus according to claim 1,

the metal member has a reinforcing rib on a side opposite to the resin sealing member.

10. Pump arrangement according to any one of claims 1 to 9,

the pump device comprises a circuit board sealed by the resin sealing member,

the circuit board is disposed on a side closer to the metal member than the stator.

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