JP2024018118A - Motor and pump device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inhibit displacement and deformation of a terminal member held by a housing (a resin sealing member) covering a stator.

SOLUTION: A motor 3 of a pump device 1 includes: a rotor 6 and a stator 5; a housing 10 covering the stator 5; a substrate 8 connected to a coil 50 of the stator 5; and a terminal set 9 in which multiple terminal members 90 connected to the substrate 8 are held by a resin terminal holding member 91. The terminal set 9 is integrated with the housing 10 with the stator 5 by insert molding. The terminal holding member 91 includes: first exposed parts S1 exposed on a surface of the housing 10; and second exposed parts which are exposed on the surface of the housing 10, facing in a direction opposite to the first exposed parts S1. When the housing 10 is molded, the first exposed parts S1 and the second exposed parts S2 are placed in contact with a mold surface to position the terminal set 9.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a motor and a pump device including a terminal member held by a resin sealing member.

Patent Document 1 describes a pump device that circulates cooling water. The pump device of Patent Document 1 uses a motor to rotate an impeller arranged in a pump chamber. The pump chamber is provided between a housing (lower body) made of a resin material and a case (upper body) fixed to the upper end of the housing. A stator that constitutes the motor is housed inside the housing. A board electrically connected to the stator coil is housed between the housing and a lid fixed to the lower end of the housing.

A connector molded integrally with the housing is provided on the side surface of the housing. A terminal member (terminal) held by the housing has one end protruding inside the connector, and the other end protruding into the space between the housing and the lid to be connected to the board.

Japanese Patent Application Publication No. 2009-100628

In a configuration in which a terminal member is held by insert molding in the housing of a motor that drives a pump device, as in Patent Document 1, depending on the shape and dimensions of the terminal member, there is a risk that the terminal member may be deformed by resin pressure during insert molding. be. Furthermore, it is difficult to stabilize the position of the terminal member, and there is a risk that the positional deviation between the connector-side end portion and the board-side end portion of the terminal member may become large.

In view of the above problems, an object of the present invention is to suppress displacement and deformation of a terminal member in a motor provided with a terminal member held in a resin housing (resin sealing member).

In order to solve the above problems, a motor of the present invention includes a rotor and a stator, a board electrically connected to a coil of the stator, a plurality of terminal members connected to the board, and a plurality of terminals. The terminal assembly includes a terminal holding member made of resin that holds a member, and a resin sealing member that covers the stator and the terminal holding member, and the terminal holding member is exposed on a surface of the resin sealing member. and a second exposed portion exposed on the surface of the resin sealing member facing in a direction different from the direction in which the first exposed portion is exposed.

According to the present invention, the plurality of terminal members connected to the board of the motor can be handled as a terminal set held by a terminal holding member made of resin. Since the terminal holding member includes a first exposed portion and a second exposed portion that are exposed on the surface of the resin sealing member, when the stator and terminal assembly are integrated with the resin sealing member by insert molding, the first exposed portion The terminal set can be positioned by bringing the first exposed portion and the second exposed portion into contact with mold surfaces facing in different directions. Therefore, the terminal member can be positioned easily and accurately. Further, deformation and positional displacement of the terminal member due to resin pressure when molding the resin sealing member can be suppressed. Therefore, the positional accuracy of the end portion of the terminal member protruding from the resin sealing member can be improved.

In the present invention, it is preferable that the second exposed portion is provided in a portion of the terminal holding member facing opposite to the first exposed portion. In this way, when setting the terminal set in the mold, the terminal holding member can be sandwiched and positioned between the opposing mold surfaces. As a result, the positional accuracy of the terminal holding member within the mold can be increased, so that the positional accuracy of the terminal member via the terminal holding member can be increased.

In the present invention, it is preferable that the second exposed portion is a crushed portion obtained by crushing the tip of a protrusion provided on the terminal holding member. When performing insert molding of a resin sealing member, the terminal holding member is placed between opposing mold surfaces, and the tips of the protrusions of the terminal holding member are crushed by the mold surface, so that the dimensions of the terminal holding member can be adjusted to the mold surface. Can be reliably matched to mold dimensions. As a result, the positional accuracy of the terminal holding member within the mold can be increased, so that the positional accuracy of the terminal member via the terminal holding member can be increased.

In the present invention, it is preferable that the first exposed portion is a flat surface. For example, it is preferable that the first exposed portion is a flat surface perpendicular to the rotational axis of the rotor. In this way, when performing insert molding using a mold in which the opening and closing direction of the mold coincides with the direction of the rotation axis, the terminal holding member can be supported on a plane perpendicular to the opening and closing direction of the mold. Therefore, displacement of the terminal holding member within the mold can be suppressed.

In the present invention, it is preferable that the first exposed portion and the second exposed portion at least partially overlap when viewed from a direction perpendicular to the flat surface. For example, it is preferable that the first exposed portion and the second exposed portion at least partially overlap when viewed from a rotation axis direction along the rotation axis of the rotor. In this way, when the terminal set is set in the mold, forces are applied to the first exposed portion and the second exposed portion in opposite directions on the same straight line. If the first exposed part and the second exposed part are arranged at different positions (positions where they do not overlap) when viewed from the mold clamping direction, there is a risk that the terminal holding member will bend due to the force applied from the mold. In the invention, since forces in opposite directions are applied to the terminal holding member on the same straight line, it is possible to avoid bending of the terminal holding member. Therefore, deformation and positional shift of the terminal member due to deformation of the terminal holding member can be avoided.

In the present invention, it is preferable that the first exposed portion is provided at a tip of a protrusion provided on the terminal holding member. In this way, by bringing the protrusion into contact with the mold instead of the wide surface, it is possible to suppress the wobbling of the terminal holding member with respect to the mold.

In the present invention, the terminal holding member includes a third exposed portion exposed on the surface of the resin sealing member, and the third exposed portion extends from the first portion in a direction crossing the arrangement direction of the plurality of terminal members. Preferably, it is away from exposed parts. In this way, the terminal holding member can be positioned with respect to the mold at two locations separated in the length direction of the terminal member. Therefore, even when the length of the terminal member is long, deformation of the terminal member can be suppressed via the terminal holding member. Thereby, the positional accuracy of the end portion of the terminal member protruding from the resin sealing member can be improved.

In this case, it is preferable that the third exposed portion faces the same direction as the first exposed portion. In this way, the first exposed portion and the third exposed portion can be brought into contact with the mold surface from the same direction, making it easy to position the terminal holding member.

Further, the terminal holding member includes a first portion provided with the first exposed portion and a second portion provided with the third exposed portion, and the first portion and the second portion are separated. It is preferable that In this way, it is possible to provide a structure in which the terminal holding member (first portion, second portion) is reliably brought into contact with the mold surface by utilizing the spring properties of the terminal member. Therefore, positioning of the terminal holding member is easy. Furthermore, movement of the terminal holding member due to resin pressure can be suppressed.

In the present invention, each of the plurality of terminal members preferably includes a terminal exposed portion exposed from the terminal holding member. In this way, when forming the terminal holding member by insert molding, the positional accuracy of the terminal member can be improved. Thereby, the positional accuracy of the terminal member with respect to the first exposed portion, which serves as a reference for positioning the terminal holding member in the housing, can be improved.

In the present invention, each of the plurality of terminal members has a first end protruding from the resin sealing member, a second end connected to the substrate, and a first end and a second end. an intermediate portion connecting the rotor, the intermediate portion comprising: an inclined portion inclined with respect to the rotational axis of the rotor; and a direction perpendicular to the rotational axis between the inclined portion and the first end portion. It is preferable that the first exposed part is provided in a part of the terminal holding member that covers the horizontal part. In this way, when extending the connector part to a position away from the board, the terminal member and the connector part can be extended in a direction inclined to the axis of rotation, which reduces the volume of the resin that makes up the connector part. be able to. Therefore, it is possible to reduce the weight and cost of the resin sealing member. On the other hand, since the first exposed portion is disposed on the horizontal portion of the terminal member, the terminal holding member can be supported in a plane perpendicular to the opening/closing direction of the mold. Therefore, displacement of the terminal holding member within the mold can be suppressed.

Next, a pump device of the present invention is characterized by having the above motor and an impeller rotationally driven by the motor.

According to the present invention, a plurality of terminal members connected to a board of a motor can be handled as a terminal set held by a terminal holding member made of resin. Since the terminal holding member includes a first exposed portion and a second exposed portion that are exposed on the surface of the resin sealing member, when the stator and terminal assembly are integrated with the resin sealing member by insert molding, the first exposed portion The terminal set can be positioned by bringing the first exposed portion and the second exposed portion into contact with mold surfaces facing in different directions. Therefore, the terminal member can be positioned easily and accurately. Further, deformation and positional shift of the terminal member due to resin pressure when molding the resin sealing member can be suppressed. Therefore, the positional accuracy of the end of the terminal member protruding from the resin sealing member can be improved.

FIG. 2 is a cross-sectional view of the pump device of Embodiment 1. FIG. 3 is a perspective view of the housing of Embodiment 1 viewed from the other side in the rotational axis direction. FIG. 3 is a cross-sectional view of the terminal set and housing of Embodiment 1 taken at a first exposed portion. FIG. 3 is a perspective view of the terminal set of Embodiment 1 viewed from the other side in the direction of the rotation axis. FIG. 2 is a perspective view of the terminal set of Embodiment 1 viewed from one side in the rotational axis direction. FIG. 3 is an explanatory diagram of a method for positioning the terminal set of Embodiment 1 with respect to a mold for insert molding. FIG. 3 is a sectional view of a pump device according to a second embodiment. FIG. 7 is a cross-sectional view of the terminal set and housing of Embodiment 2 taken at the position of the first exposed portion. FIG. 7 is a perspective view of the terminal set of Embodiment 2 viewed from the other side in the direction of the rotational axis. FIG. 7 is a perspective view of the terminal set of Embodiment 2, viewed from one side in the direction of the rotational axis. FIG. 7 is a side view of the terminal set of Embodiment 2 and an explanatory diagram of a positioning method with respect to a mold for insert molding.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A pump device 1 according to an embodiment of the present invention will be described below with reference to the drawings. In the following description, the rotation axis direction means the direction in which the rotation axis L of the motor 3 extends, the radial direction means the radial direction centered on the rotation axis L, and the circumferential direction means the direction in which the rotation axis L of the motor 3 extends. , means the direction of rotation around the rotation axis L.

(overall structure)
FIG. 1 is a cross-sectional view of the pump device 1 according to the first embodiment, and is a cross-sectional view of the pump device 1 taken along a plane including the rotation axis L. As shown in FIG. 1, the pump device 1 includes a case 2 including a suction pipe 21 extending to one side L1 in the rotation axis direction, and a motor 3 disposed on the other side L2 in the rotation axis direction with respect to the case 2. , has an impeller 4 disposed in a pump chamber 20 inside the case 2. The impeller 4 is rotationally driven around the rotation axis L by the motor 3. In the pump device 1 of this embodiment, the fluid flowing through the pump chamber 20 is a liquid.

The motor 3 includes an annular stator 5, a rotor 6 disposed inside the stator 5, a support shaft 7 that rotatably supports the rotor 6, a substrate 8 connected to a coil 50 of the stator 5, and a substrate. The terminal assembly 9 includes a terminal assembly 9 including a terminal member 90 connected to the terminal assembly 8 , a housing 10 that covers the stator 5 and the terminal assembly 9 , and a resin cover 11 that covers the substrate 8 .

The support shaft 7 is made of metal or ceramic. The impeller 4 rotates together with the rotor 6. As shown in FIG. 1, in this embodiment, the impeller 4 and the pump chamber 20 are provided on one side L1 of the stator 5 in the rotational axis direction. That is, in this embodiment, one side L1 in the direction of the rotation axis is the output side of the motor 3, and the other side L2 in the direction of the rotation axis is the opposite output side. The substrate 8 is arranged on the other side L2 of the stator 5 in the direction of the rotation axis.

Pump chamber 20 is provided between case 2 and housing 10. In addition, in FIG. 1, the shapes of the impeller 4 and the case 2 are shown in a simplified manner, and the structure for fixing the case 2 to the housing 10 is also omitted from illustration. Fluid supplied to the pump chamber 20 from a suction pipe 21 provided at the center of the case 2 is discharged to the outer peripheral side of the pump chamber 20 from a discharge pipe (not shown) as the impeller 4 rotates.

In the motor 3, the stator 5 includes a stator core 51, an insulator 52 that overlaps with the stator core 51 from one side L1 in the rotational axis direction, an insulator 53 that overlaps with the stator core 51 from the other side L2 in the rotational axis direction, and the stator core 51. It has a plurality of coils 50 wound through insulators 52 and 53 around a plurality of salient poles provided in the . Motor 3 is a three-phase motor. Therefore, the plurality of coils 50 are configured by a U-phase coil, a V-phase coil, and a W-phase coil.

The rotor 6 includes a resin rotor member 60 and a cylindrical magnet 61 held by the rotor member 60. The rotor member 60 includes a cylindrical portion 62 extending in the direction of the rotation axis, and a disk-shaped flange portion 63 extending toward the outer circumferential side from an end on one side L1 of the cylindrical portion 62 in the direction of the rotation axis. The magnet 61 is fixed to the outer peripheral surface of the cylindrical portion 62. The magnet 61 faces the stator 5 on the inside in the radial direction. The magnet 61 is made of, for example, a neodymium bonded magnet.

A cylindrical radial bearing 64 is held inside the cylindrical portion 62 . The rotor 6 is rotatably supported by the support shaft 7 via a radial bearing 64. A resin plate 41 faces the flange portion 63 from one side L1 in the rotation axis direction, and a plurality of blade portions 42 protruding from the plate 41 to the other side L2 in the rotation axis direction are connected to the flange portion 63. Ru. The blade portions 42 extend outward in the radial direction while being curved in an arc shape, and are arranged at equal angular intervals. The flange portion 63, the plate 41, and the blade portion 42 constitute the impeller 4.

(Resin sealing member)
The housing 10 is a resin sealing member that covers the stator 5 from both sides in the radial direction and both sides in the axial direction. The housing 10 (resin sealing member) is made of polyphenylene sulfide (PPS). The stator 5 and the terminal set 9 are integrated with the housing by insert molding. The housing 10 includes a first partition 12 facing the case 2 from the other side L2 in the rotational axis direction, a second partition 13 interposed between the stator 5 and the magnet 61, and It is a partition member having a bottom wall 14 provided at the end of the other side L2 in the direction of the rotation axis.

FIG. 2 is a perspective view of the housing 10 of the first embodiment viewed from the other side L2 in the rotation axis direction. As shown in FIGS. 1 and 2, the housing 10 includes a cylindrical body portion 15 that covers the stator 5 from the outside in the radial direction, and a cylindrical body portion 15 that extends outward in the radial direction at the end of the other side L2 in the rotation axis direction of the body portion 15. It includes a protruding annular flange 16, a cylinder part 17 extending from the body part 15 to the other side L2 in the rotational axis direction, and a terminal block 18 and a connector part 19 formed in a part of the cylinder part 17 in the circumferential direction.

As shown in FIG. 1, the cover 11 is fixed to the tip of the cylindrical portion 17 in the housing 10 (the end on the other side L2 in the rotational axis direction). A substrate 8 is disposed between the cover 11 and the bottom wall 14 of the housing 10. A metal winding terminal 80 that extends from the stator 5 through the bottom wall 14 of the housing 10 and projects toward the other side L2 in the rotational axis direction is connected to the substrate 8 by solder. A circuit for controlling power supply to the coil 50 is provided on the board 8 .

As shown in FIGS. 1 and 2, the cylindrical portion 17 of the housing 10 includes a first annular step portion 171 that is provided at the end of the other side L2 of the body portion 15 and overlaps the outer peripheral portion of the stator 5 from the other side L2; A first cylindrical portion 172 extending from the outer peripheral edge of the first annular step 171 toward the other side L2, a second annular step 173 extending toward the outer periphery from the end of the other side L2 of the first cylindrical portion 172, and a second annular step. A second cylindrical portion 174 is provided that extends from the outer peripheral edge of 173 to the other side L2. That is, the cylindrical portion 17 has a shape in which the inner diameter increases stepwise from the body portion 15 toward the other side L2 in the rotational axis direction. The cover 11 is fixed to the tip of the second cylindrical portion 174.

The housing 10 includes a cylindrical substrate support portion 175 that protrudes from the bottom wall 14 toward the other side L2 in the rotational axis direction at the radial center of the cylindrical portion 17 . The center portion of the substrate 8 is supported from one side L1 in the rotational axis direction by a substrate support 175, and is fixed to the substrate support 175 by screws 81 (see FIG. 1). The outer peripheral portion of the substrate 8 is supported by the second annular step portion 173 from one side L1 in the rotation axis direction.

As shown in FIG. 2, a portion of the cylindrical portion 17 in the circumferential direction is provided with a convex portion 176 that protrudes outward in the radial direction in a rectangular shape. A recessed rectangular recess 177 is provided. Inside the recess 177, a terminal block 18 is provided that protrudes radially inward from the first annular step 171 and the first cylindrical portion 172 and also protrudes from the bottom wall 14 toward the other side L2 in the rotational axis direction. The terminal block 18 has a rectangular parallelepiped shape with its long sides extending in a direction perpendicular to the radial direction.

The connector portion 19 includes a first arm portion 191 extending radially outward from the convex portion 176 and a second arm portion 192 extending from the tip of the first arm portion 191 in a direction inclined with respect to the first arm portion 191. In this embodiment, the second arm portion 192 extends at an angle toward the outside in the radial direction toward the other side L2 in the rotation axis direction.

(terminal set)
FIG. 3 is a cross-sectional view of the terminal set 9 and housing 10 of the first embodiment taken at the position of the first exposed portion S1 (the AA position in FIG. 2). FIG. 4 is a perspective view of the terminal set 9 of the first embodiment viewed from the other side L2 in the rotational axis direction. FIG. 5 is a perspective view of the terminal set 9 of Embodiment 1 viewed from one side L1 in the rotational axis direction. Note that FIGS. 4 and 5 are views showing the terminal set 9 before being integrated into the housing 10 by insert molding.

As shown in FIGS. 4 and 5, the terminal set 9 includes a plurality of terminal members 90 and a terminal holding member 91 made of resin that holds the terminal members 90. The terminal holding member 91 is made of the same resin as that used to mold the housing 10, and is integrated with the plurality of terminal members 90 by insert molding. In this embodiment, the terminal set 9 includes four terminal members 90 having the same shape. Each terminal member 90 is a bent elongated plate-shaped metal member. The four terminal members 90 are arranged in a line at regular intervals. As described above, when the terminal assembly 9 is integrated into the housing 10 by insert molding, the four terminal members 90 are arranged at regular intervals in a direction perpendicular to the rotational axis direction and perpendicular to the radial direction ( (see Figure 2).

As shown in FIG. 2, the third exposed portion S3 of the terminal holding member 91 in the terminal set 9 integrated with the housing 10 by insert molding is exposed on the other side L2 of the terminal block 18 in the rotational axis direction. . A plurality of terminal members 90 protrude from the third exposed portion S3 toward the other side L2 in the rotation axis direction. In this embodiment, four terminal members 90 are arranged at regular intervals in the long side direction of the terminal block 18.

As shown in FIG. 3, the first arm portion 191 of the connector portion 19 includes a second side surface 193 facing the other side L2 in the rotation axis direction, and a first side surface 194 facing the opposite side in the rotation axis direction from the other side surface 193. . Here, the one side surface 194 includes an inclined surface 195 extending radially outward from the outer circumferential surface of the convex portion 176 toward the other side L2 in the rotation axis direction, and a horizontal surface 196 connected to the tip of the inclined surface 195. Be prepared. The horizontal surface 196 and the other side surface 193 are flat surfaces perpendicular to the rotation axis L. The first arm portion 191 is connected to the outer circumferential surface of the convex portion 176 via a reinforcing rib 197 extending along the inclined surface 195 on the other side L2 of the first arm portion 191 in the rotational axis direction.

As shown in FIGS. 1 and 3, each of the plurality of terminal members 90 in the terminal set 9 has a first end portion 901 that projects inside a recess 198 provided at the tip of the second arm portion 192 in the connector portion 19. and a second end 902 that protrudes from the terminal block 18 to the other side L2 in the rotational axis direction inside the cylindrical portion 17 and is connected to the substrate 8, and connects the first end 901 and the second end 902. An intermediate portion 903 is provided. The terminal member 90 is embedded inside the connector portion 19 and the terminal block 18 with a portion of the intermediate portion 903 covered by the terminal holding member 91.

As shown in FIG. 3, the intermediate portion 903 of each terminal member 90 is bent at two locations. That is, the intermediate portion 903 includes a first horizontal portion 904 connected to the first end portion 901, an inclined portion 905 inclined at 45 degrees with respect to the first horizontal portion 904, and an inclined portion 905 inclined at 45 degrees with respect to the inclined portion 905. A second horizontal portion 906 is provided that extends parallel to the first horizontal portion 904 . The first horizontal portion 904 and the second horizontal portion 906 extend in a direction perpendicular to the rotation axis L. The second end portion 902 is bent at a substantially right angle from the second horizontal portion 906 and extends toward the other side L2 in the rotation axis direction. The first end 901 is inclined with respect to the second horizontal portion 906 at an angle greater than 45 degrees (eg, 60 degrees).

As shown in FIGS. 4 and 5, the terminal holding member 91 extends in a shape along the intermediate portion 903 of the four terminal members 90. As shown in FIGS. More specifically, the terminal holding member 91 includes a first portion 92 that covers the first horizontal portion 904 halfway, a second portion 93 that covers the entire inclined portion 905, and a second horizontal portion 906 that covers the second end portion 902. A third portion 94 is provided that covers up to the corner connected to the third portion 94. The third portion 94 is provided with a recess 95 recessed on one side L1 in the rotational axis direction.

At the bottom of the recess 95 provided in the terminal holding member 91, the surface of the second horizontal portion 906 of the terminal member 90 is exposed. That is, the intermediate portion 903 of the terminal member 90 is provided with a terminal exposed portion 907 exposed from the terminal holding member 91. When molding the terminal holding member 91 by insert molding, the terminal member 90 is positioned by bringing the terminal exposed portion 907 into contact with the mold surface. As shown in FIG. 3, the terminal exposed portion 907 is covered with the resin forming the housing 10 by inserting the terminal set 9 and molding the housing 10.

The terminal holding member 91 includes exposed portions exposed on the surface of the housing 10 at a plurality of locations. In this embodiment, the exposed portions include a first exposed portion S1 exposed on the other side surface 193, which is the surface on the other side L2 of the connector portion 19 in the rotational axis direction, and a first exposed portion S1 exposed on the other side surface 193, which is the surface on the other side L2 of the connector portion 19 in the rotational axis direction. A second exposed portion S2 exposed on one side 194 is provided. Further, the terminal holding member 91 includes a third exposed portion S3 exposed on the surface of the other side L2 of the terminal block 18 in the rotational axis direction.

As shown in FIG. 3, the first exposed portion S1 and the second exposed portion S2 are the first end portion of two horizontal portions formed by bending the intermediate portion 903 of the terminal member 90 at two points. It is provided in a portion covering the first horizontal portion 904 provided between the inclined portion 901 and the inclined portion 905.

The terminal holding member 91 includes a first portion 92 that covers the first horizontal portion 904, and the first portion 92 includes a protrusion portion 96 that protrudes toward the other side L2 in the rotation axis direction, and a protrusion portion 96 that protrudes toward the other side L2 in the rotation axis direction. A protrusion 97 that protrudes toward the side L1 is provided. As shown in FIG. 4, the protrusion 96 has a rectangular parallelepiped shape. As shown in FIG. 3, the first exposed portion S1 is the tip surface of the protrusion 96. As shown in FIG. Therefore, the first exposed portion S1 is a flat surface perpendicular to the rotation axis L.

As shown in FIG. 5, the protrusion 97 has a triangular cross-sectional shape and a pointed tip. As described below, a crushed portion 98 is formed at the tip of the projection 97 by being crushed by the mold surface during insert molding (see FIG. 3). FIG. 5 shows the shape of the protrusion 97 before its tip is crushed. The second exposed portion S2 is a crushed portion 98, and the crushed portion 98 is a flat surface perpendicular to the rotation axis L.

As shown in FIGS. 4 and 5, one protrusion 96 and one protrusion 97 are provided at each end of the first portion 92 in the arrangement direction of the terminal members 90. As shown in FIGS. In other words, one protrusion 96 and one protrusion 97 are provided at each end of the first portion 92 in a direction perpendicular to the rotational axis direction and perpendicular to the radial direction. Each protrusion 97 is provided at a position overlapping with the protrusion 96 in the rotational axis direction.

As shown in FIG. 4, the third portion 94 of the terminal holding member 91 includes a tip portion 99 located on the opposite side of the second portion 93 with respect to the recess 95 recessed toward one side L1 in the rotation axis direction. The third exposed portion S3 includes a convex portion S31 that protrudes from the surface of the other side L2 in the rotational axis direction of the tip portion 99, and a flat portion S32 that surrounds the outer periphery of the convex portion S31. The convex portion S31 has a rectangular parallelepiped shape with the long side direction being the direction in which the four terminal members 90 are arranged. The four terminal members 90 protrude from the tip surface of the convex portion S31.

FIG. 6 is an explanatory diagram of a method for positioning the terminal set 9 of the first embodiment with respect to a mold for insert molding. FIG. 6(a) is a diagram showing a state in which the terminal assembly 9 is brought into contact with the first mold M1, and FIG. 6(b) is a diagram showing a state in which the first mold M1 and the second mold M2 are clamped to form a crushed portion 98. It is a figure showing the state where is formed.

When molding the housing 10, the terminal set 9 and the stator 5 are set between the first mold M1 and the second mold M2 and filled with a resin material. The mold is configured such that the opening/closing direction of the first mold M1 and the second mold M2 coincides with the rotation axis direction of the housing 10, which is a molded product. When setting the terminal assembly 9 in the mold, as shown in FIG. 6(a), the terminal holding member 91 is placed between the mold surface MS1 of the first mold M1 and the mold surface MS2 of the second mold M2. The distal end surface of the protruding portion 96 and the flat portion S32 of the surface of the distal end portion 99 are respectively brought into contact with the mold surface MS1 of the first mold M1. Note that a recessed portion capable of accommodating the convex portion S31 protruding from the flat portion S32 and the second end portion 902 of the terminal member 90 protruding from the convex portion S31 is formed in the mold surface MS1.

After the terminal set 9 is positioned in contact with the first mold M1, the second mold M2 is moved in a direction to approach the first mold M1 and the molds are clamped. At this time, as shown in FIG. 6(b), the tip of the protrusion 97 is pressed by the mold surface MS2 of the second mold M2, so a flat crushed portion 98 is formed at the tip of the protrusion 97. Ru.

After that, when the mold is filled with a resin material and cured, and the molded product is removed from the mold, as shown in FIGS. 2 and 3, on the surface facing the other side L2 in the rotational axis direction of the housing 10, The first exposed portion S1 and the third exposed portion S3 are exposed. More specifically, two first exposed portions S1 are exposed on the other side surface 193 of the connector portion 19, and a third exposed portion S3 (flat portion S32, convex portion S31) is exposed on the surface of the other side L2 of the terminal block 18. is exposed. Further, as shown in FIG. 3, a second exposed portion S2 (crushed portion 98) is exposed on one side 194 of the connector portion 19. The second exposed portion S2 is exposed at a portion of the horizontal surface 196 on the one side surface 194.

(Main effects of Embodiment 1)
As described above, the motor 3 used in the pump device 1 of Embodiment 1 includes the rotor 6, the stator 5, the board 8 electrically connected to the coil 50 of the stator 5, and the plurality of motors connected to the board 8. The terminal assembly 9 includes a terminal member 90 and a terminal holding member 91 made of resin that holds a plurality of terminal members 90, and a housing 10 that is a resin sealing member that covers the stator 5 and the terminal holding member 91. The terminal holding member 91 has a first exposed portion S1 exposed on the surface of the housing 10 and a direction (one side L1 in the rotational axis direction) that is different from the direction in which the first exposed portion S1 is exposed (the other side L2 in the rotational axis direction). ) is provided with a second exposed portion S2 exposed on the surface of the housing 10.

In the first embodiment, a plurality of terminal members 90 connected to the board 8 of the motor 3 are held by a terminal holding member 91 made of resin, and can be handled as a terminal set 9. Since the terminal holding member 91 includes a first exposed portion S1 and a second exposed portion S2 exposed on the surface of the housing 10, when the stator 5 and the terminal assembly 9 are integrated with the housing 10 by insert molding, the first exposed portion S1 and the second exposed portion S2 are exposed on the surface of the housing 10. The terminal set 9 can be positioned by bringing the exposed portion S1 and the second exposed portion S2 into contact with different mold surfaces MS1 and MS2. By positioning the terminal member 90 within the mold through the terminal holding member 91 in this manner, the terminal member 90 can be positioned easily and accurately. Further, deformation and positional displacement of the terminal member 90 due to resin pressure when molding the housing 10 can be suppressed. Therefore, the positional accuracy of the first end 901 protruding from the housing 10 and the second end 902 connected to the substrate 8 can be improved.

In the first embodiment, the second exposed portion S2 is provided at a portion of the terminal holding member 91 facing opposite to the first exposed portion S1. That is, as shown in FIG. 3, the first exposed portion S1 and the second exposed portion S2 (the crushed portion 98) are provided at positions facing opposite sides in the rotation axis direction. Therefore, when setting the terminal set 9 in the mold, the terminal holding member 91 can be positioned between the opposing mold surfaces MS1 and MS2. Therefore, the positional accuracy of the terminal holding member 91 within the mold can be improved, and the positional accuracy of the terminal member 90 via the terminal holding member 91 can be improved.

In the first embodiment, the second exposed portion S2 is a crushed portion 98 obtained by crushing the tip of a protrusion 97 provided on the terminal holding member 91. In the first embodiment, when performing insert molding of the housing 10, the terminal holding member 91 is arranged between the opposing mold surfaces MS1, and the tip of the protrusion 97 of the terminal holding member 91 is crushed by the mold surface MS2. , the dimensions of the terminal holding member 91 can be reliably matched to the dimensions of the mold. Thereby, the positional accuracy of the terminal holding member 91 within the mold can be increased, and the positional accuracy of the terminal member 90 via the terminal holding member 91 can be increased.

In the first embodiment, the first exposed portion S1 includes a flat surface perpendicular to the rotation axis direction. Therefore, when performing insert molding using a mold in which the opening and closing direction of the mold coincides with the rotational axis direction, the terminal holding member 91 can be supported on a plane perpendicular to the opening and closing direction of the mold. Therefore, displacement of the terminal holding member 91 within the mold can be suppressed.

In the first embodiment, the first exposed portion S1 and the second exposed portion S2 overlap when viewed from a direction perpendicular to the first exposed portion S1, which is a flat surface. As described above, the first exposed portion S1 is a flat surface perpendicular to the rotation axis L, and the first exposed portion S1 and the second exposed portion S2 entirely overlap when viewed from the rotation axis direction. In such an arrangement, when setting the terminal set 9 in the mold, forces are applied to the first exposed portion S1 and the second exposed portion S2 in opposite directions on the same straight line. When the first exposed portion S1 and the second exposed portion S2 are arranged at positions shifted from each other when viewed from the mold clamping direction, there is a risk that the terminal holding member 91 may be bent by the force applied from the mold. In this case, since forces in opposite directions are applied to the terminal holding member 91 on the same straight line, it is possible to avoid bending of the terminal holding member 91. Therefore, deformation and positional shift of the terminal member 90 due to deformation of the terminal holding member 91 can be avoided. Note that the first exposed portion S1 and the second exposed portion S2 (the crushed portion 98) may at least partially overlap when viewed from the rotation axis direction.

In the first embodiment, the first exposed portion S1 is provided at the tip of the protrusion 96 provided on the terminal holding member 91. In this way, by bringing the plurality of protrusions 96 into contact with the mold instead of the wide surface, it is possible to suppress the wobbling of the terminal holding member 91 with respect to the mold.

In the first embodiment, the terminal holding member 91 includes a third exposed portion S3 exposed on the surface of the housing 10. The third exposed portion S3 is separated from the first exposed portion S1 in a direction intersecting the arrangement direction of the plurality of terminal members 90. More specifically, the first exposed portion S1 is provided at the end (first portion 92) of the terminal holding member 91 on the first end 901 side, and the third exposed portion S3 is provided at the second end of the terminal holding member 91. It is provided at the end on the section 902 side (third section 94). In this way, if the exposed portions (that is, the portions that come into contact with the mold surface) are provided at positions apart in the length direction of the terminal member 90, even if the terminal member 90 is long, the terminal holding member 91 Deformation of the terminal member 90 can be suppressed through this. Therefore, the positional accuracy of the first end 901 and the second end 902 of the terminal member 90 can be improved. Furthermore, in the first embodiment, the third exposed portion S3 and the first exposed portion S1 both face the other side L2 in the rotation axis direction, and are faced in the same direction. Therefore, since the two exposed portions are brought into contact with the mold surface MS1 from the same direction, positioning of the terminal holding member 91 is easy.

In the first embodiment, each of the plurality of terminal members 90 includes a terminal exposed portion 907 exposed from the terminal holding member 91, and the terminal exposed portion of the terminal member 90 is provided on the bottom surface of the recess 95 provided in the terminal holding member 91. 907 is exposed. In the terminal assembly 9 of the first embodiment, when the terminal holding member 91 is molded by insert molding, the terminal member 90 can be brought into contact with the mold surface to improve positional accuracy. Thereby, the positional accuracy of the terminal member 90 with respect to the first exposed portion S1, which serves as a reference for positioning the terminal holding member 91 in the housing 10, can be improved.

In Embodiment 1, the intermediate portion 903 of each of the plurality of terminal members 90 has an inclined portion 905 that is inclined with respect to the rotational axis L, and an inclined portion 905 that is perpendicular to the rotational axis L between the inclined portion 905 and the first end portion 901. A first horizontal portion 904 is provided that extends in the direction. The first exposed portion S1 is provided in a portion of the terminal holding member 91 that covers the first horizontal portion 904 (first portion 92 of the terminal holding member 91). By providing the inclined portion 905 on the terminal member 90, the connector portion 19 can be extended in a direction inclined with respect to the rotation axis L. Therefore, even when the connector portion 19 is extended to a position away from the substrate 8, the volume of the resin forming the connector portion 19 can be reduced. Therefore, the weight and cost of the housing 10 can be reduced. On the other hand, since the first exposed portion S1 can be provided in a portion of the terminal member 90 that covers the first horizontal portion 904 (the first portion 92 of the terminal holding member 91), the first exposed portion S1 is perpendicular to the opening/closing direction of the mold. The terminal holding member 91 can be supported by the surface. Therefore, displacement of the terminal holding member 91 within the mold can be suppressed.

The pump device 1 of Embodiment 1 has the above-mentioned motor 3 and an impeller 4 rotationally driven by the motor 3. When the direction along the rotation axis L of the rotor 6 is the rotation axis direction, the pump device 1 is provided with a pump chamber 20 in which the impeller 4 is disposed on one side L1 in the rotation axis direction with respect to the stator 5. The substrate 8 is arranged on the other side L2 in the direction of the rotation axis. The housing 10 includes a side surface 193 facing the other side L2 in the rotation axis direction with respect to the substrate 8 on the other side L2 in the rotation axis direction (i.e., the opposite output side of the motor 3), and the first exposed portion S1 is The other side surface 193 is exposed. As described above, in the first embodiment, when molding the housing 10, the mold surface MS1 is used to mold the portion (the other side surface 193) located on the opposite side of the impeller 4 (i.e., the opposite output side) with respect to the substrate 8. The terminal set 9 can be positioned using the . Therefore, when extending the connector part 19 to the side opposite to the impeller 4 with respect to the board 8, even if the distance from the board 8 to the end of the connector part 19 is long, the connector part 19 can be extended at a position close to the end of the connector part 19. The terminal holding member 91 can be positioned. Therefore, the positional accuracy of the terminal member 90 can be improved.

(Embodiment 2)
Hereinafter, regarding the pump device 1A of Embodiment 2, the same parts as in Embodiment 1 will be given the same reference numerals and the explanation will be omitted. FIG. 7 is a cross-sectional view of the pump device 1A according to the second embodiment, and is a cross-sectional view of the pump device 1A cut along a plane including the rotation axis L. A perspective view of the housing 10A of the second embodiment viewed from the other side L2 in the rotational axis direction is the same as a perspective view (FIG. 2) of the housing 10 of the first embodiment viewed from the other side L2 in the rotational axis direction. Illustrations are omitted.

A pump device 1A according to the second embodiment includes a motor 3A that rotates an impeller 4. The pump device 1A has the same configuration as the first embodiment except that the terminal set 9 of the first embodiment is changed to a terminal set 9A. FIG. 8 is a cross-sectional view of the terminal set 9A and the housing 10A cut at the first exposed portion S1. FIG. 9 is a perspective view of the terminal set 9A of the second embodiment viewed from the other side L2 in the rotation axis direction. FIG. 10 is a perspective view of the terminal set 9A of the second embodiment viewed from one side L1 in the rotation axis direction. Note that FIGS. 9 and 10 are diagrams showing the terminal set 9A before being integrated into the housing 10 by insert molding.

As shown in FIGS. 9 and 10, the terminal set 9A includes a plurality of terminal members 90A and a terminal holding member 91A made of resin that holds the terminal members 90A. Terminal holding member 91A of Embodiment 2 includes a first portion 92A and a second portion 99A. The first portion 92A and the second portion 99A are resin parts separated from each other. The first portion 92A has the same configuration as the first portion 92 of the terminal holding member 91 of the first embodiment which is cut from the second portion 93. The second portion 99A has the same configuration as the tip portion 99 of the third portion 94 in the terminal holding member 91 of the first embodiment. The first portion 92A and the second portion 99A are integrated with the four terminal members 90A by insert molding.

The first portion 92A has a rectangular parallelepiped shape with its long sides extending in the direction in which the terminal members 90A are arranged. 1st
The portion 92A includes a protrusion 96 that protrudes to the other side L2 in the rotation axis direction, and a protrusion 97 that protrudes from the first portion 92 to the one side L1 in the rotation axis direction. The arrangement and shape of the protrusion 96 and the protrusion 97 are the same as in the first embodiment.

The second portion 99A has a rectangular parallelepiped shape with its long sides extending in the direction in which the terminal members 90A are arranged. The second portion 99A includes a convex portion S31 that protrudes toward the other side L2 in the rotational axis direction, and a flat portion S32 that surrounds the outer periphery of the convex portion S31. From the tip of the convex portion S31, second ends 902 of the four terminal members 90A protrude toward the other side L2 in the rotation axis direction.

FIG. 11(a) is a side view of the terminal set 9A of the second embodiment. FIG. 11(b) is an explanatory diagram of a method for positioning the terminal assembly 9 of Embodiment 1 with respect to a mold for insert molding, and is a diagram showing a state in which the terminal assembly 9 is brought into contact with the first mold M1.

As shown in FIG. 8, in the second embodiment, when the housing 10A is completed, the terminal member 90A is embedded in such a shape that the inclination angle of the inclined part 905A with respect to the first horizontal part 904 and the second horizontal part 906 is θ. ing. On the other hand, in the terminal set 9A before insert molding, as shown in FIGS. 9 and 11(a), the inclination angle of the inclined part 905A with respect to the first horizontal part 904 and the second horizontal part 906 is θ1. In the second embodiment, θ1 is an angle smaller than θ. Thereby, when setting the terminal set 9A in the mold, the second portion 99A can be pressed against the mold surface MS1 by utilizing the springiness of the metal terminal member 90A, as described below. Note that in FIGS. 8, 9, 11(a), and 11(b), the angular difference between θ and θ1 is shown larger than it actually is in order to make the explanation easier to understand.

When positioning the terminal set 9A of the second embodiment with respect to the first mold M1, as shown in FIG. S32 is brought into contact with the mold surface MS1. At this time, the terminal member 90A is deformed so that the inclination angle of the inclined portion 905A changes from θ1 to θ according to the shape of the mold surface MS1. As a result, a spring force is generated in the terminal member 90A in the direction in which the inclination angle of the inclined portion 905A returns from θ to θ1, so that the flat portion S32 of the second portion 99A is pressed against the mold surface MS1 by the spring force. It will be done.

In the second embodiment, similarly to the first embodiment, the tip of the protrusion 97 is pressed by the mold surface MS2 of the second mold M2 to form the crushed part 98, and the protrusion 96 is crushed by the pressing force from the second mold M2. The tip surface of the mold is pressed against the mold surface MS1 for positioning. Thereafter, when the mold is filled with a resin material and cured, and the molded product is removed from the mold, two first exposed portions S1 are exposed on the other side surface 193 of the connector portion 19, as in the first embodiment. At the same time, the third exposed portion S3 (flat portion S32, convex portion S31) is exposed on the surface of the other side L2 of the terminal block 18. Further, a second exposed portion S2 (crushed portion 98) is exposed on one side 194 of the connector portion 19. The second exposed portion S2 is exposed at a horizontal surface 196 on one side 194 (see FIG. 8).

(Main effects of Embodiment 2)
In the second embodiment, as in the first embodiment, the terminal holding member 91A is provided with the first exposed portion S1, the second exposed portion S2, and the third exposed portion S3, so that the terminal holding member 91A is placed on the mold surface. Positioning can be performed by bringing it into contact with MS1 and MS2. Therefore, the terminal member 90A can be positioned easily and accurately. Further, deformation and positional shift of the terminal member 90A due to resin pressure when molding the housing 10A can be suppressed.

In the second embodiment as well, the form and arrangement of the first exposed part S1, the second exposed part S2, and the third exposed part S3 are the same as in the first embodiment, so it is possible to obtain the same effects as in the first embodiment. can.

In the second embodiment, the terminal holding member 91A includes a first portion 92A in which the first exposed portion S1 is provided, and a second portion 99A in which the third exposed portion S3 is provided. Portion 99A is separate. Therefore, it is possible to reliably bring the terminal holding member 91A (first portion 92A, second portion 99A) into contact with the mold surface MS1 by utilizing the springiness of the terminal member 90. Therefore, the terminal holding member 91A can be positioned easily and accurately. Further, movement of the terminal holding member 91A due to resin pressure can be suppressed.

(Other embodiments)
(1) In each of the above embodiments, the connector portion 19 includes a portion extending in a direction inclined with respect to the rotational axis direction, but the shape of the connector portion 19 is not limited to such a shape, and may be changed as appropriate. It is possible. For example, it is not necessary to include a portion that is inclined with respect to the rotation axis direction. Further, the shape of the terminal member 90 may be any shape as long as it extends from the connector portion 19 to the board 8, and can be changed as appropriate.

(2) The terminal holding member 91 may have any shape as long as it can hold the intermediate portions of the plurality of terminal members 90 and provide the exposed portions S1, S2, and S3 exposed on the surface of the housing 10. Further, the positions and shapes of the first exposed portion S1, the second exposed portion S2, and the third exposed portion S3 are not limited to the positions and shapes of the above embodiments. For example, the second exposed portion S2 may be provided at a position that does not overlap with the first exposed portion S1 in the rotation axis direction. Further, the second exposed portion S2 only needs to be exposed on the surface of the housing 10 facing in a different direction from the first exposed portion S1, and does not need to face the opposite side to the first exposed portion S1. Further, the third exposed portion S3 may be omitted. When providing the third exposed portion S3, the third exposed portion S3 may face in a different direction from the first exposed portion S1. Further, the first exposed portion S1 and the third exposed portion S3 do not need to be flat surfaces.

(3) In each of the above embodiments, the terminal holding member 91 is made of the same resin as the housing 10, but may be made of a different resin from the housing 10.

(4) Although the above embodiments are all motors used in pump devices, the present invention can be applied to motors used in devices other than pump devices.

1, 1A...pump device, 2...case, 3, 3A...motor, 4...impeller, 5...stator, 6...rotor, 7...support shaft, 8...board, 9, 9A...terminal set, 10, 10A...housing (Resin sealing member), 11...Cover, 12...First partition part, 13...Second partition part, 14...Bottom wall, 15...Body part, 16...Flange, 17...Cylinder part, 18...Terminal block, 19 ...Connector part, 20...Pump chamber, 21...Suction pipe, 41...Plate, 42...Blade part, 50...Coil, 51...Stator core, 52, 53...Insulator, 60...Rotor member, 61...Magnet, 62...Cylindrical part , 63... flange portion, 64... radial bearing, 80... winding terminal, 81... screw, 90, 90A... terminal member, 91, 91A... terminal holding member, 92, 92A... first part, 93... second part, 94...Third portion, 95...Concave portion, 96...Protrusion portion, 97...Protrusion portion, 98...Crushed portion, 99...Tip portion, 99A...Second portion, 171...First annular step portion, 172...First cylindrical portion , 173... Second annular step part, 174... Second cylindrical part, 175... Substrate supporting part, 176... Convex part, 177... Concave part, 191... First arm part, 192... Second arm part, 193... Other side surface, 194... One side surface, 195... Inclined surface, 196... Horizontal surface, 197... Reinforcement rib, 198... Recessed portion, 901... First end portion, 902... Second end portion, 903... Intermediate portion, 904... First horizontal portion, 905 , 905A... inclined part, 906... second horizontal part, 907... terminal exposed part, L... rotation axis, L1... one side in the rotation axis direction, L2... other side in the rotation axis direction, M1... first type, M2... Second mold, MS1, MS2...mold surface, S1...first exposed part, S2...second exposed part, S3...third exposed part, S31...convex part, S32...flat part

Claims (12)

a rotor and a stator;
a substrate electrically connected to the coil of the stator;
a terminal set including a plurality of terminal members connected to the substrate, and a terminal holding member made of resin that holds the plurality of terminal members;
a resin sealing member that covers the stator and the terminal holding member;
The terminal holding member has a first exposed portion exposed on the surface of the resin sealing member, and a second exposed portion facing the direction different from the direction in which the first exposed portion is exposed and exposed on the surface of the resin sealing member. A motor comprising: an exposed portion; The motor according to claim 1, wherein the second exposed portion is provided in a portion of the terminal holding member facing opposite to the first exposed portion. 3. The motor according to claim 2, wherein the second exposed portion is a crushed portion obtained by crushing a tip of a protrusion provided on the terminal holding member. The motor according to claim 1, wherein the first exposed portion is a flat surface. The motor according to claim 4, wherein the first exposed portion and the second exposed portion at least partially overlap when viewed in a direction perpendicular to the flat surface. The motor according to claim 1, wherein the first exposed portion is provided at a tip of a protrusion provided on the terminal holding member. The terminal holding member includes a third exposed portion exposed on the surface of the resin sealing member,
The motor according to claim 1, wherein the third exposed portion is separated from the first exposed portion in a direction intersecting the arrangement direction of the plurality of terminal members. The motor according to claim 7, wherein the third exposed portion faces the same direction as the first exposed portion. The terminal holding member includes a first portion provided with the first exposed portion, and a second portion provided with the third exposed portion,
The motor according to claim 7, wherein the first portion and the second portion are separated. The motor according to claim 1, wherein each of the plurality of terminal members includes a terminal exposed portion exposed from the terminal holding member. Each of the plurality of terminal members is
comprising a first end protruding from the resin sealing member, a second end connected to the substrate, and an intermediate portion connecting the first end and the second end,
The intermediate portion includes an inclined portion that is inclined with respect to the rotational axis of the rotor, and a horizontal portion that extends in a direction perpendicular to the rotational axis between the inclined portion and the first end,
The motor according to claim 1, wherein the first exposed portion is provided in a portion of the terminal holding member that covers the horizontal portion. A pump device comprising: the motor according to claim 1; and an impeller rotationally driven by the motor.

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