Motor and pump apparatus

Abstract

A motor and a pump device are provided with a circuit board for controlling the motor and a resin-made board holding member for holding the circuit board, and even if the thermal deformation amount of the board holding member is increased, it is possible to suppress damage to a soldering portion, which is a portion to which a terminal pin is fixed by soldering, of the circuit board. In the motor, a substrate holding member (7) is provided with: a substrate contact surface (7e) which is in contact with a surface on the Z2 direction side of a protruding part (6a) of a power supply substrate (6); first restricting portions (7f) disposed on both sides of the protruding portion in the circumferential direction of the rotor; and a second restricting portion (7g) disposed on the Z1 direction side of the protruding portion (6a). A gap is formed between the outer peripheral surface of the circuit substrate (6) and the substrate holding member (7) in the radial direction of the rotor. An elastic member (30) is disposed between the protruding portion and the second restricting portion (7g), and the movement of the circuit board in the radial direction of the rotor relative to the board holding member is restricted by the elastic force of the elastic member.

Description

Technical Field

[0001] The present invention relates to a motor used in a pump device, etc. The present invention also relates to a pump device having such a motor. Background Art

[0002] Conventionally, there is known a motor used in a pump device (for example, see Patent Document 1). The motor described in Patent Document 1 includes: a cylindrical stator; a rotor arranged inside the stator; a resin housing covering the stator; and a circuit board for driving and controlling the motor. The stator includes: a drive coil; a stator core around which the drive coil is wound via an insulator; and a plurality of terminal pins (winding terminals) to which the ends of the drive coil are connected.

[0003] In the motor described in Patent Document 1, the circuit substrate is a rigid substrate such as a glass epoxy substrate, and is formed in a flat plate shape. The thickness direction of the circuit substrate is consistent with the axial direction of the rotor. The ends of a plurality of terminal pins are fixed to the circuit substrate by soldering. Two cylindrical portions for fixing the circuit substrate are formed on the housing. The circuit substrate is fixed to the housing by screws (specifically, self-tapping screws) screwed into the inner circumference of the cylindrical portion. Prior art literature Patent Literature

[0004] Patent Document 1: Japanese Patent Application Publication No. 2022-102076 Summary of the invention

[0005] When the motor described in Patent Document 1 is used in an environment with a drastic temperature change, the thermal deformation of the resin housing (i.e., the thermal expansion and thermal contraction of the housing) may increase. In addition, in the motor described in Patent Document 1, the circuit board is fixed to the housing by screws, so when the housing is thermally deformed (i.e., when the housing is thermally expanded or thermally contracted), the circuit board is easily deformed in the radial direction of the rotor in accordance with the thermal deformation of the housing.

[0006] Therefore, when the motor described in Patent Document 1 is used in an environment with a drastic temperature change and the thermal deformation of the housing increases, the deformation of the circuit board in the radial direction of the rotor may increase. In addition, when the deformation of the circuit board in the radial direction of the rotor increases, the stress of the soldering part, which is the part of the circuit board where the terminal pin is fixed by soldering, increases, and the soldering part may be damaged.

[0007] Therefore, the present invention aims to provide a motor having a circuit substrate for controlling the motor and a substrate holding member made of resin for holding the circuit substrate, wherein even if the thermal deformation of the substrate holding member increases, damage to the soldered portion of the circuit substrate to which the terminal pins are fixed by soldering can be suppressed. Another object of the present invention is to provide a pump device having such a motor.

[0008] In order to solve the above-mentioned problems, the motor of the present invention comprises a rotor and a stator, a circuit substrate for controlling the motor and a resin substrate holding component for holding the circuit substrate, the stator comprises a driving coil, a stator core around which the driving coil is wound, and a plurality of terminal pins connected to the ends of the driving coil, one side of the axial direction of the rotor is set as a first direction side, and the opposite side of the first direction side is set as a second direction side, the thickness direction of the circuit substrate formed in a flat plate shape is consistent with the axial direction of the rotor, the circuit substrate is arranged at a position closer to the first direction side than the stator core, the ends of the first direction side of the plurality of terminal pins are soldered and fixed to the circuit substrate, a plurality of protrusions protruding toward the radial outer side of the rotor are formed on the circuit substrate, and the substrate holding component is formed with: A substrate contact surface, which contacts the surface of the protrusion on the second direction side; a first limiting portion, which is arranged on both sides of the protrusion in the circumferential direction of the rotor and limits the movement of the circuit substrate relative to the substrate holding component in the circumferential direction of the rotor; and a second limiting portion, which is arranged on the first direction side of the protrusion and limits the movement of the circuit substrate relative to the substrate holding component to the first direction side, an elastic component is arranged between the protrusion and the second limiting portion, which contacts the surface of the protrusion on the first direction side and the surface of the second limiting portion on the second direction side, and a gap is formed between the outer peripheral surface of the circuit substrate and the substrate holding component in the radial direction of the rotor, and the movement of the circuit substrate relative to the substrate holding component in the radial direction of the rotor is limited by the elastic force of the elastic component.

[0009] In the motor of the present invention, the substrate holding component is formed with: a substrate contact surface that contacts the surface on the second direction side of the protrusion of the circuit substrate; a first limiting portion that is arranged on both sides of the protrusion in the circumferential direction of the rotor; and a second limiting portion that is arranged on the first direction side of the protrusion. In addition, in the present invention, a gap is formed between the outer peripheral surface of the circuit substrate and the substrate holding component in the radial direction of the rotor. Moreover, in the present invention, an elastic component that contacts the surface on the first direction side of the protrusion and the surface on the second direction side of the second limiting portion is arranged between the protrusion and the second limiting portion, and the movement of the circuit substrate relative to the substrate holding component in the radial direction of the rotor is limited by the elastic force of the elastic component.

[0010] Therefore, in the present invention, even if the substrate holding member is thermally deformed, the deformation of the circuit substrate in the radial direction of the rotor corresponding to the thermal deformation of the substrate holding member can be suppressed. Therefore, in the present invention, even if the amount of thermal deformation of the substrate holding member becomes large, the deformation of the circuit substrate in the radial direction of the rotor can be suppressed, and as a result, damage to the portion of the circuit substrate to which the terminal pin is soldered, i.e., the soldered portion, can be suppressed. In addition, in the present invention, an elastic member is arranged between the protrusion and the second limiting portion, so that even if the motor vibrates, the vibration of the circuit substrate relative to the substrate holding member can be suppressed. Therefore, in the present invention, damage to the circuit substrate caused by the vibration of the motor can be prevented.

[0011] In the present invention, the elastic member is preferably a cured elastic adhesive. If so configured, since the elastic member is attached to the surface of the first direction side of the protrusion and the surface of the second direction side of the second limiting portion, the elastic member can be prevented from detaching from between the protrusion and the second limiting portion with a simple structure.

[0012] In the present invention, it is preferred that a pair of second limiting portions are formed on the substrate holding member and are arranged on the first direction side of one protruding portion and are arranged at a distance in the circumferential direction of the rotor, and a part of the elastic member is arranged between the pair of second limiting portions in the circumferential direction of the rotor. With such a configuration, the contact area between the second limiting portion and the elastic member can be increased, and therefore, the fixing strength of the elastic member, which is a cured elastic adhesive, to the substrate holding member can be increased.

[0013] In the present invention, for example, the motor has a plurality of second terminal pins for a connector held by a substrate holding component, and on the circuit substrate, three protrusions are formed which are arranged at intervals of 120° relative to the axis of the rotor when viewed from the axial direction of the rotor, one of the three protrusions is set as a first protrusion, one of the remaining two protrusions is set as a second protrusion, one side of the circumference of the rotor is set as a third direction side, and the opposite side of the third direction is set as a fourth direction side, the ends of the first direction sides of the plurality of terminal pins are arranged along the circumference of the rotor, and are arranged between the first protrusion and the second protrusion in the circumference of the rotor and on the third direction side of the first protrusion, and the ends of the first direction sides of the plurality of second terminal pins are soldered and fixed to the circuit substrate, and are arranged between the first protrusion and the second protrusion in the circumference of the rotor and on the fourth direction side of the first protrusion.

[0014] In this case, the protrusion, the first limiting portion, the second limiting portion, and the elastic member arranged at three locations at 120° intervals can hold the circuit substrate in a well-balanced manner. In addition, in this case, even if the thermal deformation of the substrate holding member increases, damage to the soldered portion of the circuit substrate where the second terminal pin is fixed by soldering can be suppressed.

[0015] The motor of the present invention can be used for a pump device having an impeller that rotates by the power of the motor and a pump chamber that is provided with the impeller and the rotor and through which a fluid passes. In the pump device, even if the thermal deformation of the substrate holding member increases, damage to the soldered portion of the circuit substrate to which the terminal pin is soldered and fixed can be suppressed. In addition, in the pump device, damage to the circuit substrate caused by vibration of the motor can be prevented.

[0016] As described above, in the present invention, in a motor having a circuit substrate for controlling a motor and a resin substrate holding component for holding the circuit substrate, even if the thermal deformation of the substrate holding component increases, damage to the soldered portion of the circuit substrate where the terminal pins are fixed by soldering can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of a pump device according to an embodiment of the present invention. Figure 2 is from Figure 1 The pump device shown is a perspective view with the casing and cover removed. Figure 3 is from Figure 1 The pump device is shown in a top view with the casing and cover removed. Figure 4 In (A), Figure 2 The enlarged view of the E part of Figure 3 (C) is an enlarged view of the F portion of (B), and (B) is an enlarged view showing the circuit board and the housing from the GG direction. DETAILED DESCRIPTION

[0018] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0019] (Overall structure of pump equipment) Figure 1 It is a cross-sectional view of the pump device 1 according to the embodiment of the present invention. Figure 2 is from Figure 1 The pump device 1 shown in FIG. 1 is a perspective view of a state where the housing 8 and the cover 9 are removed. Figure 1 The Z1 direction side of the same is defined as the "upper" side, and the side opposite to the upper side is defined as Figure 1 The Z2 direction side is defined as the "lower" side. In the following description, the "upper and lower directions" are defined for convenience of description and do not necessarily coincide with the direction of the vertical line (vertical direction).

[0020] The pump device 1 of this embodiment is a type of pump called a sealed pump (sealed electric pump), and is used, for example, to circulate a cooling liquid. The pump device 1 includes an impeller 2 and a motor 3 that rotates the impeller 2. The motor 3 includes a rotor 4, a stator 5, and a circuit board 6 for driving and controlling the motor 3. The impeller 2, the motor 3, and the circuit board 6 are arranged inside a housing 10 composed of a housing 7, a shell 8 covering the lower side of the housing 7, and a cover 9 covering the upper side of the housing 7.

[0021] The outer shell 7, the shell 8 and the cover 9 are formed of resin. The shell 8 is joined to the lower end of the outer shell 7 by ultrasonic welding, and the cover 9 is joined to the upper end of the outer shell 7 by ultrasonic welding. The cover 9 of the present embodiment is composed of two cover parts 11 and 12. An O-ring 13 is arranged between the two cover parts 11 and 12. A fluid suction part 8a and a fluid discharge part (not shown) are formed on the shell 8. A pump chamber 14 is formed inside the housing 10, and the fluid sucked from the suction part 8a passes through the pump chamber 14 toward the discharge part. The pump chamber 14 is defined by the outer shell 7 and the shell 8.

[0022] The rotor 4 includes: a cylindrical driving magnet 15; a cylindrical sleeve 16; and a holding member 17 for holding the driving magnet 15 and the sleeve 16. The holding member 17 is formed of resin. In addition, the holding member 17 is formed into a substantially cylindrical shape with a flange. The driving magnet 15 is fixed to the outer peripheral side of the holding member 17, and the sleeve 16 is fixed to the inner peripheral side of the holding member 17. In the present embodiment, the lower end of the holding member 17 becomes the impeller 2. That is, the impeller 2 is formed integrally with the holding member 17. However, the impeller 2 formed separately from the holding member 17 may also be fixed to the lower end of the holding member 17. The impeller 2 is rotated by the power of the motor 3. The impeller 2 and the rotor 4 are arranged in the pump chamber 14.

[0023] The rotor 4 is rotatably supported on the fixed shaft 18 and rotates around the fixed shaft 18. The fixed shaft 18 is configured so that its axial direction coincides with the up-down direction. That is, the up-down direction is the axial direction of the rotor 4. The upper side (Z1 direction side) of the present embodiment becomes one side of the axial direction of the rotor 4, that is, the first direction side, and the lower side (Z2 direction side) becomes the opposite side of the first direction side, that is, the second direction side. In the following description, the radial direction of the rotor 4 is referred to as the "radial direction", and the circumferential direction (circumferential direction) of the rotor 4 is referred to as the "circumferential direction".

[0024] The lower end of the fixed shaft 18 is held by the shell 8, and the upper end of the fixed shaft 18 is held by the housing 7. The fixed shaft 18 is inserted into the inner circumference of the sleeve 16. A thrust bearing member 19 is mounted on the fixed shaft 18 so as to contact the lower end surface of the sleeve 16. In the present embodiment, the sleeve 16 functions as a radial bearing of the rotor 4, and the sleeve 16 and the thrust bearing member 19 function as a thrust bearing of the rotor 4.

[0025] The stator 5 is formed in a cylindrical shape. The stator 5 is arranged on the outer peripheral side of the rotor 4. The stator 5 includes a driving coil 21, a stator core 22 and an insulator 23. The stator core 22 is, for example, a laminated core formed by laminating thin magnetic plates made of magnetic material. The stator core 22 includes an outer peripheral ring portion formed in an annular shape and a plurality of salient pole portions protruding radially inward from the outer peripheral ring portion. The front end surface of the salient pole portion is opposite to the outer peripheral surface of the driving magnet 15 via a cylindrical portion 7a described later that constitutes a part of the housing 7. The insulator 23 is formed of an insulating material such as resin. The driving coil 21 is wound on the salient pole portion of the stator core 22 via the insulator 23. That is, the driving coil 21 is wound on the stator core 22.

[0026] In addition, the stator 5 includes a plurality of terminal pins 24 connected to the ends of the drive coil 21. The stator 5 of the present embodiment includes five terminal pins 24. The ends of the drive coil 21 are tied and fixed to the terminal pins 24. The lower ends of the five terminal pins 24 are fixed to the insulator 23. The upper ends of the five terminal pins 24 are fixed to the circuit substrate 6 by soldering. That is, the drive coil 21 is electrically connected to the circuit substrate 6 via the terminal pins 24. The lower side portions of the five terminal pins 24 are embedded in the housing 7.

[0027] As described above, the housing 7 is formed of resin. The housing 7 is formed integrally with the stator 5 in a manner covering a portion of the stator 5. In the present embodiment, the housing 7 is formed integrally with the stator 5 by insert molding. The housing 7 constitutes a portion of the motor 3. The housing 7 completely covers the drive coil 21. The housing 7 includes: a cylindrical portion 7a in a cylindrical shape, which is arranged between the front end surface of the salient pole portion of the stator core 22 and the outer peripheral surface of the drive magnet 15; and a bottom portion 7b, which blocks the upper end of the cylindrical portion 7a. The outer shape of the upper end portion of the housing 7 when viewed from the upper side is a circle centered on the axis of the rotor 4 (i.e., the axis of the fixed shaft 18).

[0028] A recess 7c is formed on the upper side of the bottom 7b, which is recessed from the upper end surface of the housing 7 toward the lower side. The shape of the side surface of the recess 7c when viewed from the upper side is a circle centered on the axis of the rotor 4. The bottom 7b and the recess 7c are arranged on the upper side of the drive coil 21, the stator core 22 and the insulator 23. The circuit substrate 6 is arranged on the upper side of the recess 7c. The housing 7 has the function of preventing the fluid in the pump chamber 14 from flowing into the stator 5 and the arrangement position of the circuit substrate 6. The cover 9 is fixed to the upper end of the housing 7 in a manner that covers the circuit substrate 6 arranged on the upper side of the recess 7c from the upper side and the radial outside. A more specific structure of the housing 7 will be described later.

[0029] The circuit substrate 6 is a rigid substrate such as a glass epoxy substrate, and is formed in a flat plate shape. The thickness direction of the circuit substrate 6 is consistent with the up-down direction. As described above, the circuit substrate 6 is arranged on the upper side of the recess 7c. That is, the circuit substrate 6 is arranged at a position higher than the stator core 22. In addition, the circuit substrate 6 is arranged on the outer side of the pump chamber 14. The circuit substrate 6 is held by the housing 7. The housing 7 of the present embodiment becomes a substrate holding component that holds the circuit substrate 6. A more specific structure of the circuit substrate 6 will be described later.

[0030] The upper ends of a plurality of terminal pins 27 for connectors are fixed by soldering to the circuit substrate 6. In the present embodiment, the ends of the four terminal pins 27 are fixed by soldering to the circuit substrate 6. The four terminal pins 27 are held in the housing 7. That is, the motor 3 includes four terminal pins 27 held in the housing 7. Parts of the four terminal pins 27 are arranged in the connector portion 7d formed in the housing 7. The terminal pins 27 of the present embodiment are second terminal pins.

[0031] (Structure of circuit board and housing) Figure 3 is from Figure 1 The pump device 1 is shown in a plan view in a state where the case 8 and the cover 9 are removed. Figure 4 (A) is Figure 2 The enlarged view of part E of Figure 4 (B) is Figure 3 The enlarged view of the F part, Figure 4 (C) is from Figure 4 FIG. 1 shows an enlarged view of the circuit board 6 and the housing 7 in the direction of GG in FIG.

[0032] In the following description, a predetermined direction orthogonal to the up-down direction ( Figure 3 The left-right direction in the figure is defined as the “left-right direction”, and the direction perpendicular to the up-down direction and the left-right direction is defined as the “front-back direction”. Figure 3 The X1 direction side of the Figure 3 The X2 direction side is set as the "rear" side, and the Figure 3 The Y1 direction side of the Figure 3 The Y2 direction side is set to the "left" side.

[0033] The circuit substrate 6 is formed in a roughly circular plate shape. As described above, the thickness direction of the circuit substrate 6 coincides with the up-down direction. A through hole through which the upper ends of the terminal pins 24 and 27 are inserted is formed on the circuit substrate 6. In addition, a plurality of protrusions 6a protruding radially outward are formed on the circuit substrate 6. Three protrusions 6a are formed on the circuit substrate 6 of the present embodiment. The three protrusions 6a are arranged at a pitch of 120° relative to the axis of the rotor 4 when viewed from the up-down direction. The protrusions 6a are formed at three locations: the rear end of the circuit substrate 6, the right front side of the circuit substrate 6, and the left front side of the circuit substrate 6. The protrusions 6a are formed in a rectangular flat plate shape.

[0034] like Figure 3 As shown, the upper ends of the five terminal pins 24 fixed on the circuit substrate 6 are arranged in the circumferential direction. Specifically, the upper ends of the five terminal pins 24 are arranged at a certain interval in the circumferential direction. For example, the upper ends of the five terminal pins 24 are arranged at a pitch of about 30° relative to the axis of the rotor 4 when viewed from the top and bottom directions. In addition, the upper ends of the five terminal pins 27 are arranged at a position further back than the center of the circuit substrate 6 in the front-to-back direction. The upper ends of the four terminal pins 27 fixed on the circuit substrate 6 are arranged at a certain interval in the left-to-right direction. In addition, the upper ends of the four terminal pins 27 are fixed to the front end of the circuit substrate 6. The upper ends of the four terminal pins 27 are arranged in the center of the circuit substrate 6 in the left-to-right direction.

[0035] The protrusion 6a disposed on the left front side among the three protrusions 6a is referred to as the first protrusion 6a1 (see Figure 3 ), the protrusion 6a arranged on the right front side of the remaining two protrusions 6a is set as the second protrusion 6a2 (refer to Figure 3 ), one side of the circumference (specifically Figure 3 The clockwise direction side of the third direction is set as the third direction side, and the opposite side of the third direction side (i.e. Figure 3 The upper ends of the five terminal pins 24 are arranged between the first protrusion 6a1 and the second protrusion 6a2 in the circumferential direction and on the third direction side of the first protrusion 6a1. In addition, the upper ends of the four terminal pins 27 are arranged between the first protrusion 6a1 and the second protrusion 6a2 in the circumferential direction and on the fourth direction side of the first protrusion 6a1.

[0036] A substrate contact surface 7e is formed on the housing 7 for the lower surface of the protrusion 6a to contact. The substrate contact surface 7e is a plane orthogonal to the up-down direction. In addition, a first limiting portion 7f is formed on the housing 7, which is arranged on both sides of the protrusion 6a in the circumferential direction and limits the movement of the circuit substrate 6 relative to the housing 7 in the circumferential direction. That is, in the housing 7, a pair of first limiting portions 7f are formed at three locations. The circumferential inner side surfaces of the pair of first limiting portions 7f become planes orthogonal to the circumferential direction. A small gap is formed between the circumferential inner side surfaces of the pair of first limiting portions 7f and the circumferential side surfaces of the protrusion 6a.

[0037] In addition, a second limiting portion 7g is formed on the housing 7, which is arranged on the upper side of the protruding portion 6a and limits the upward movement of the circuit substrate 6 relative to the housing 7. In this embodiment, a pair of second limiting portions 7g are formed on the housing 7 and are arranged on the upper side of one protruding portion 6a. That is, in the housing 7, a pair of second limiting portions 7g are formed at three locations. The pair of second limiting portions 7g are arranged in a state of being spaced apart in the circumferential direction. The lower surface of the second limiting portion 7g is a plane orthogonal to the up-down direction.

[0038] The outer circumferential ends of the pair of second limiting portions 7g are connected to the upper end of the first limiting portion 7f. In this embodiment, by performing a caulking operation on the rectangular parallelepiped protrusion 7k (see Figure 4 The first limiting portion 7f and the second limiting portion 7g are formed by heat riveting while heating the protrusion 7k to deform. The lower surface of the second limiting portion 7g is arranged above the protrusion 6a and does not contact the upper surface of the protrusion 6a. The front end surface (radial outer end surface) of the protrusion 6a is designed to be arranged at the same position in the radial direction as the radial outer side surfaces of the first limiting portion 7f and the second limiting portion 7g.

[0039] like Figure 4 As shown in (C), an elastic member 30 is disposed between the protrusion 6a and the second limiting portion 7g, and is in contact with the upper surface of the protrusion 6a and the lower surface of the second limiting portion 7g. The elastic member 30 is a cured elastic adhesive. Therefore, the elastic member 30 is attached to the upper surface of the protrusion 6a and the lower surface of the second limiting portion 7g. Figure 4 As shown in (A) and the like, a part of the elastic member 30 is disposed between the pair of second restricting portions 7g in the circumferential direction. Specifically, a part of the elastic member 30 is filled in the entire region between the pair of second restricting portions 7g in the circumferential direction.

[0040] In the radial direction, a gap is formed between the outer peripheral surface of the circuit substrate 6 and the housing 7. Specifically, in the radial direction, a gap is formed between the outer peripheral surface of the circuit substrate 6 except for the portion where the three protrusions 6a are formed and the side surface of the recess 7c. In addition, as described above, the circuit substrate 6 is arranged on the upper side of the recess 7c, and the lower surface of the circuit substrate 6 does not contact the housing 7 except for the protrusions 6a. The lower surface of the protrusion 6a is not bonded to the substrate contact surface 7e, and the protrusion 6a is not fixed to the substrate contact surface 7e. In addition, the circumferential side surface of the protrusion 6a is not bonded to the circumferential inner side surface of a pair of first limiting portions 7f, and the protrusion 6a is not fixed to the pair of first limiting portions 7f. In addition, the housing 7 does not have a portion arranged radially outside the protrusion 6a.

[0041] Therefore, in the present embodiment, the movement of the circuit substrate 6 relative to the housing 7 in the radial direction is limited by the elastic force of the elastic member 30. More specifically, the movement of the circuit substrate 6 relative to the housing 7 in the radial direction is limited only by the elastic force of the elastic member 30. That is, the circuit substrate 6 is not constrained by the housing 7 in the radial direction at a portion other than the elastic member 30, and as long as the upper end portions of the terminal pins 24 and 27 are not inserted through the through holes of the circuit substrate 6, the circuit substrate 6 can move relative to the housing 7 in the radial direction within the range of elastic deformation of the elastic member 30.

[0042] In this embodiment, the substrate contact surface 7e, the first restricting portion 7f, the second restricting portion 7g and the elastic member 30 constitute substrate retaining portions 32 for the housing 7 to retain the circuit substrate 6. The housing 7 retains the circuit substrate 6 only by the substrate retaining portions 32 disposed at three locations.

[0043] (Main Effects of the Present Embodiment) As described above, in the present embodiment, as described above, the movement of the circuit substrate 6 in the radial direction relative to the housing 7 is limited by the elastic force of the elastic member 30 disposed between the protruding portion 6a of the circuit substrate 6 and the second limiting portion 7g of the housing 7. Therefore, in the present embodiment, even if the housing 7 is thermally deformed, the deformation of the circuit substrate 6 in the radial direction corresponding to the thermal deformation of the housing 7 can be suppressed. Therefore, in the present embodiment, even if the thermal deformation amount of the housing 7 increases, the deformation amount of the circuit substrate 6 in the radial direction can be suppressed. As a result, in the present embodiment, even if the thermal deformation amount of the housing 7 increases, damage to the soldered portion of the circuit substrate 6 to which the terminal pins 24 and 27 are soldered and fixed can be suppressed.

[0044] In addition, in this embodiment, since the elastic member 30 is arranged between the protrusion 6a and the second limiting portion 7g, even if the pump device 1 vibrates, the vibration of the circuit board 6 relative to the housing 7 can be suppressed. Therefore, in this embodiment, damage to the circuit board 6 caused by the vibration of the pump device 1 can be prevented.

[0045] In the present embodiment, the elastic member 30 is a cured elastic adhesive, and is attached to the upper surface of the protrusion 6a and the lower surface of the second limiting portion 7g. Therefore, in the present embodiment, the elastic member 30 can be prevented from being separated from between the protrusion 6a and the second limiting portion 7g with a simple structure. In addition, in the present embodiment, since a part of the elastic member 30, which is a cured elastic adhesive, is arranged between a pair of second limiting portions 7g in the circumferential direction, the contact area between the second limiting portion 7g and the elastic member 30 can be increased. Therefore, in the present embodiment, the fixing strength of the elastic member 30 relative to the housing 7 can be improved. In addition, in the present embodiment, since the three protrusions 6a are arranged at a pitch of 120° relative to the axis of the rotor 4, the circuit substrate 6 can be held in a well-balanced manner by the protrusions 6a and the substrate holding portion 32 arranged at three locations.

[0046] (Other embodiments) The above-described embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited thereto, and various modifications can be made without departing from the spirit of the present invention.

[0047] In the above embodiment, a part of the elastic member 30 may not be arranged between the pair of second limiting portions 7g in the circumferential direction. In addition, in the above embodiment, the elastic member 30 may not be a cured elastic adhesive. For example, the elastic member 30 may be a member that does not have adhesiveness, such as rubber. In this case, the elastic member 30 is not attached to the upper surface of the protrusion 6a and the lower surface of the second limiting portion 7g.

[0048] In the above embodiment, a second limiting portion 7g that connects the upper ends of a pair of first limiting portions 7f to each other may be arranged on the upper side of a protrusion 6a. In addition, in the above embodiment, the three protrusions 6a may not be arranged at a 120° interval relative to the axis of the rotor 4. For example, the protrusions 6a may be formed at three locations: the rear end of the circuit substrate 6, the right end of the circuit substrate 6, and the left end of the circuit substrate 6. In addition, in the above embodiment, the number of protrusions 6a formed on the circuit substrate 6 may be four or more. In this case, the same number of substrate retaining portions 32 as the number of protrusions 6a are provided. In addition, the motor 3 to which the present invention is applied may also be used in equipment other than the pump equipment 1.

[0049] (Configuration of this technology) Note that the present technology can adopt the following configurations. (1) A motor having a rotor and a stator, wherein: A circuit board for controlling the motor and a resin substrate holding member for holding the circuit board are provided. The stator includes a drive coil, a stator core around which the drive coil is wound, and a plurality of terminal pins connected to ends of the drive coil. One side of the rotor in the axial direction is defined as a first direction side, and the side opposite to the first direction side is defined as a second direction side. The thickness direction of the circuit substrate formed in a flat plate shape coincides with the axial direction of the rotor. The circuit substrate is arranged on the first direction side relative to the stator core. The end portions of the plurality of terminal pins on the first direction side are fixed to the circuit substrate by soldering. A plurality of protrusions protruding toward the radial outer side of the rotor are formed on the circuit substrate. The substrate holding component is formed with: a substrate contact surface that contacts the surface of the protrusion on the second direction side; a first limiting portion that is arranged on both sides of the protrusion in the circumferential direction of the rotor and limits the movement of the circuit substrate relative to the substrate holding component in the circumferential direction of the rotor; and a second limiting portion that is arranged on the first direction side of the protrusion and limits the movement of the circuit substrate relative to the substrate holding component to the first direction side. An elastic member is arranged between the protruding portion and the second limiting portion, and the elastic member is in contact with a surface of the protruding portion on the first direction side and a surface of the second limiting portion on the second direction side. In the radial direction of the rotor, a gap is formed between the outer peripheral surface of the circuit substrate and the substrate holding member. Movement of the circuit substrate relative to the substrate holding member in the radial direction of the rotor is restricted by the elastic force of the elastic member. (2) The motor according to (1), wherein the elastic member is a cured elastic adhesive. (3) The motor according to (2), wherein: A pair of the second limiting portions is formed on the substrate holding member, the pair of the second limiting portions is arranged on the first direction side of one of the protruding portions and is arranged in a state of being spaced apart in the circumferential direction of the rotor, A portion of the elastic member is disposed between a pair of the second restricting portions in the circumferential direction of the rotor. (4) The motor according to any one of (1) to (3), wherein: A plurality of second terminal pins for the connector held by the substrate holding member are provided, The circuit board is provided with three protrusions arranged at intervals of 120° relative to the axis of the rotor when viewed from the axial direction of the rotor. One of the three protrusions is set as a first protrusion, one of the remaining two protrusions is set as a second protrusion, one side of the circumferential direction of the rotor is set as a third direction side, and the opposite side of the third direction is set as a fourth direction side, The end portions of the plurality of terminal pins on the first direction side are arranged along the circumferential direction of the rotor and are arranged between the first protrusion and the second protrusion in the circumferential direction of the rotor and on the third direction side of the first protrusion. Ends of the plurality of second terminal pins on the first direction side are fixed to the circuit board by soldering, and are arranged between the first protrusion and the second protrusion in the circumferential direction of the rotor and on the fourth direction side of the first protrusion. (5) A pump device comprising: the motor according to any one of (1) to (4); an impeller rotated by power of the motor; and a pump chamber in which the impeller and the rotor are arranged and through which a fluid passes. Explanation of symbols

[0050] 1 Pump equipment 2 Impeller 3 Motor 4 rotors 5. Stator 6 Circuit board 6a protrusion 6a1 First protrusion 6a2 Second protrusion 7 Shell (substrate holding component) 7e substrate contact surface 7fFirst restriction section 7g Second restriction section 14 Pump Room 21 Driving coil 22 stator core 24 terminal pins 27 terminal pin (second terminal pin) 30 Elastic components Z1 first direction side Z2 second direction side.

Claims

1. A motor having a rotor and a stator, characterized in that: The invention comprises: a circuit substrate for controlling the motor; and a substrate holding member made of resin for holding the circuit substrate. The stator comprises: a drive coil; a stator core around which the drive coil is wound; and a plurality of terminal pins connected to ends of the drive coil. One side of the rotor in the axial direction is defined as a first direction side, and the side opposite to the first direction side is defined as a second direction side. The thickness direction of the circuit substrate formed in a flat plate is consistent with the axial direction of the rotor. The circuit substrate is arranged on the first direction side relative to the stator core. The end portions of the plurality of terminal pins on the first direction side are fixed to the circuit substrate by soldering. A plurality of protrusions protruding toward the radial outer side of the rotor are formed on the circuit substrate. The substrate holding component is formed with: a substrate contact surface that contacts the surface of the protrusion on the second direction side; a first limiting portion that is arranged on both sides of the protrusion in the circumferential direction of the rotor and limits the movement of the circuit substrate relative to the substrate holding component in the circumferential direction of the rotor; and a second limiting portion that is arranged on the first direction side of the protrusion and limits the movement of the circuit substrate relative to the substrate holding component to the first direction side. An elastic member is arranged between the protruding portion and the second limiting portion, and the elastic member is in contact with a surface of the protruding portion on the first direction side and a surface of the second limiting portion on the second direction side. In the radial direction of the rotor, a gap is formed between the outer peripheral surface of the circuit substrate and the substrate holding member. Movement of the circuit substrate relative to the substrate holding member in the radial direction of the rotor is restricted by the elastic force of the elastic member.

2. The motor according to claim 1, characterized in that The elastic component is a cured elastic adhesive.

3. The motor according to claim 2, characterized in that The substrate holding member includes a pair of second restricting portions which are arranged on the first direction side of one of the protruding portions and are arranged at a distance from each other in the circumferential direction of the rotor. A portion of the elastic member is disposed between a pair of the second restricting portions in the circumferential direction of the rotor.

4. The motor according to any one of claims 1 to 3, characterized in that A plurality of second terminal pins for the connector held by the substrate holding member are provided, The circuit board is provided with three protrusions arranged at intervals of 120° relative to the axis of the rotor when viewed from the axial direction of the rotor. One of the three protrusions is set as a first protrusion, one of the remaining two protrusions is set as a second protrusion, one side of the circumferential direction of the rotor is set as a third direction side, and the opposite side of the third direction is set as a fourth direction side, The end portions of the plurality of terminal pins on the first direction side are arranged along the circumferential direction of the rotor and are arranged between the first protrusion and the second protrusion in the circumferential direction of the rotor and on the third direction side of the first protrusion. Ends of the plurality of second terminal pins on the first direction side are fixed to the circuit board by soldering, and are arranged between the first protrusion and the second protrusion in the circumferential direction of the rotor and on the fourth direction side of the first protrusion.

5. A pump device, characterized in that: have: The motor according to any one of claims 1 to 3; an impeller rotated by power of the motor; and The impeller and the rotor are arranged in a pump chamber through which a fluid passes.

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