Motor and pump arrangement

Abstract

A motor and pump device is provided that can appropriately fix a first end portion and a second end portion of a connector terminal that face in mutually different directions using a resin seal member. The connector terminal has a fixed portion between the first end portion and the second end portion, the first end portion protrudes from the resin seal member inside a cylindrical connector housing portion that opens in a direction that intersects a rotational center axis direction, the second end portion protrudes from the resin seal member on a side opposite the first end portion toward one side of the rotational center axis direction, and the fixed portion is fixed to the resin seal member. The fixed portion has a first covered portion that is covered by the resin seal member around the first end portion side and a second covered portion that is covered by the resin seal member around the second end portion side, and the connector terminal has an exposed portion that is exposed from an opening portion of the resin seal member between the first covered portion and the second covered portion.

Description

TECHNICAL FIELD

[0001] The present application relates to a motor and pump device in which a connector housing portion is provided on a resin-sealed member covering a stator. BACKGROUND

[0002] In a motor in which a cylindrical connector housing portion is provided on a resin-sealed member covering a stator, the connector housing portion is open toward a direction orthogonal to a rotational center axis, and a first end portion of a connector terminal protrudes from the resin-sealed member on the inner side of the connector housing portion. In addition, a winding terminal connected to a winding that constitutes a stator coil protrudes toward one side of the rotational center axis and is connected to a substrate arranged orthogonal to the rotational center axis. Therefore, an end portion of the connector terminal on the side opposite to the first end portion becomes a second end portion that protrudes toward one side of the rotational center axis, and the second end portion is connected to the substrate. Therefore, in the connector terminal, the portion between the first end portion and the second end portion is a fixed portion that is covered by the resin-sealed member (see Patent Document 1).

[0003] PRIOR ART DOCUMENTS

[0004] PATENT DOCUMENT

[0005] Patent Document 1: Japanese Patent No. 6550698 SUMMARY

[0006] In the technology described in Patent Document 1, since the entirety between the first end portion and the second end portion that face mutually different directions is a fixed portion that is covered by the resin-sealed member, the fixed portion between the first end portion and the second end portion cannot be positioned by a mold when the resin-sealed member is molded. Therefore, even if the first end portion and the second end portion are positioned when the resin-sealed member is molded, the position of the fixed portion is likely to shift, and there is a problem in that the connector terminal is difficult to be properly held by the resin-sealed member.

[0007] In view of the above problems, an object of the present application is to provide a motor and pump device in which the first end portion and the second end portion of a connector terminal that face mutually different directions can be properly fixed by a resin-sealed member.

[0008] To solve the above problems, a motor of the present application is characterized by comprising: a stator including a coil; a resin sealing member covering the stator and including a cylindrical connector housing portion that is open in a direction intersecting a rotational center axis direction of a rotor; a plurality of connector terminals including a first end portion protruding from the resin sealing member toward an opening direction of the connector housing portion inside the connector housing portion, a second end portion protruding from the resin sealing member toward one side of the rotational center axis direction on a side opposite to the first end portion, and a fixed portion fixed to the resin sealing member between the first end portion and the second end portion; and a substrate electrically connected to the coil and the second end portion, the fixed portion including a first covering portion covered by the resin sealing member around the first end portion side, and a second covering portion covered by the resin sealing member around the second end portion side, the plurality of connector terminals each including an exposed portion exposed from the resin sealing member toward one side of the rotational center axis direction between the first covering portion and the second covering portion.

[0009] In the present application, the connector terminal includes a first end portion protruding from the resin sealing member toward a direction intersecting the rotational center axis, and a second end portion protruding from the resin sealing member toward one side of the rotational center axis direction, and a fixed portion fixed to the resin sealing member between the first end portion and the second end portion. In addition, the fixed portion includes a first covering portion covered by the resin sealing member around the first end portion side, and a second covering portion covered by the resin sealing member around the second end portion side, and the plurality of connector terminals each include an exposed portion exposed from the resin sealing member toward one side of the rotational center axis direction between the first covering portion and the second covering portion. Therefore, when the resin sealing member is molded, the portion corresponding to the exposed portion can be positioned by a mold or the like. Thus, the first end portion and the second end portion of the connector terminal can be appropriately fixed by the resin sealing member.

[0010] In the present application, the following mode can be employed: the exposed portion is composed of a flat plate portion protruding toward the rotational center axis direction in a plate thickness direction. According to this mode, the connector terminal can be reliably positioned.

[0011] In the present application, the following mode can be employed: the first covering portion has a portion extending obliquely with respect to the rotational center axis between the first end portion and the exposed portion.

[0012] In the present application, the following mode can be employed: the opening portion is provided with a plurality of openings in a manner that the exposed portion is exposed for each of the plurality of connector terminals.

[0013] In the present application, the following mode can be employed: only the surface of one side of the rotation center axis of the exposed portion is exposed from the resin member, and the side surface of the connector terminal is covered with the resin sealing member.

[0014] In the present application, the following mode can be employed: the substrate is fixed to the resin sealing member in a manner that the plate thickness direction is oriented toward the rotation center axis direction, and the winding terminal connected to the winding that constitutes the coil protrudes from the resin sealing member toward one side of the rotation center axis direction and is connected to the substrate.

[0015] In the present application, the following mode can be employed: a cover that covers the substrate from the side opposite to the resin sealing member and whose outer peripheral end is fused to the resin sealing member is provided, and the connector housing portion is constituted by a cylindrical protruding portion that protrudes to the radial outer side without overlapping the cover when viewed from the rotation center axis direction. According to this mode, when the cover is fused, the portion of the resin sealing member that avoids the connector housing portion can be supported from the other side of the rotation center axis direction.

[0016] In the present application, the following mode can be employed: the substrate and the cover have a circular planar shape as a whole, and the substrate and the cover are respectively provided with a straight line portion that is linearly cut from one side where the connector housing portion is present. According to this mode, the position of the front end portion of the connector housing portion can be set to the inner side in the radial direction, and thus the outer diameter dimension of the motor can be reduced.

[0017] The motor of the present application can be used for a pump device, in which case the pump device has an impeller that is rotated by the motor.

[0018] Effects of the Invention

[0019] In the present application, the connector terminal has a first end portion that protrudes from the resin sealing member toward a direction intersecting the rotation center axis and a second end portion that protrudes from the resin sealing member toward one side of the rotation center axis direction, and a fixed portion that is fixed to the resin sealing member is provided between the first end portion and the second end portion. In addition, the fixed portion has a first covered portion that is covered with the resin sealing member around the first end portion side and a second covered portion that is covered with the resin sealing member around the second end portion side, and a plurality of connector terminals respectively have an exposed portion that is exposed from the resin sealing member toward one side of the rotation center axis direction between the first covered portion and the second covered portion, and thus, when the resin sealing member is molded, the portion corresponding to the exposed portion can be positioned by a mold or the like. Therefore, the first end portion and the second end portion of the connector terminal can be appropriately fixed by the resin sealing member. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1is a perspective view showing one embodiment of a pump device and a motor to which the present application is applied.

[0021] Figure 2 is Figure 1 is a longitudinal sectional view of the pump device and the motor shown in

[0022] Figure 3 is a perspective view of the pump device shown in Figure 1

[0023] Figure 4 is an exploded perspective view of a state in which the cover is removed from the state shown in Figure 3

[0024] Figure 5 is an exploded perspective view of a state in which the base plate is removed from the state shown in Figure 4

[0025] Figure 6 is an explanatory view showing the connector terminal and the like shown in Figure 2

[0026] Figure 7 is an explanatory view showing a state in which the resin sealing member is cut off from the connector terminal shown in Figure 2 DETAILED DESCRIPTION

[0027] Hereinafter, a motor 10 and a pump device 1 according to an embodiment of the present application will be described with reference to the accompanying drawings. In the following description, the direction of a rotation center axis L refers to a direction in which the rotation center axis L extends, the radial direction of the inner side in the radial direction and the outer side in the radial direction refers to a radial direction with the rotation center axis L as the center, and the circumferential direction refers to a rotational direction with the rotation center axis L as the center.

[0028] (Overall structure)

[0029] Figure 1 is a perspective view showing one embodiment of a pump device 1 and a motor 10 to which the present application is applied. Figure 2 is Figure 1 is a longitudinal sectional view of the pump device 1 and the motor 10 shown in Figure 1 and Figure 2 In the pump device 1, the motor 10, and the like shown in

[0030] ​​​​​The motor 10 includes a cylindrical stator 3, a rotor 4 disposed inside the stator 3, a resin seal member 6 that covers the stator 3 as a housing 60, and a circular rod-shaped support shaft 5 that rotatably supports the rotor 4. The support shaft 5 is made of metal or ceramic. In the pump device 1 of the embodiment, the fluid is a liquid, and the pump device 1 is used under conditions in which the ambient temperature and the fluid temperature easily change.

[0031] The housing 2 constitutes a wall surface 23 on the other side L2 in the direction of the rotation center axis L of the pump chamber 20 and a side wall 29 extending in the circumferential direction. The housing 2 includes a suction pipe 21 extending in the direction of the rotation center axis L and a discharge pipe 22 extending in a direction orthogonal to the rotation center axis L, and the suction pipe 21 and the discharge pipe 22 each include a suction port 21a and a discharge port 22a at an end portion. The suction pipe 21 is concentrically disposed with respect to the rotation center axis L.

[0032] In the motor 10, the stator 3 includes a stator core 31, insulators 32 and 33 held to the stator core 31, and a coil 35 wound to the stator core 31 with the insulators 32 and 33 interposed.

[0033] The rotor 4 includes a cylindrical portion 40 that extends toward the pump chamber 20 along the rotation center axis L from a position opposed to the stator 3 on the radially inner side and that is open at the pump chamber 20. A cylindrical drive magnet 8 is held to the outer peripheral surface of the cylindrical portion 40 in a manner opposed to the stator 3 on the radially inner side. The drive magnet 8 is, for example, a neodymium bond magnet.

[0034] In the rotor 4, a flange portion 45 in the shape of a circular plate is formed at an end portion on the other side L2 in the direction of the rotation center axis L of the cylindrical portion 40, and a circular plate 26 is connected to the flange portion 45 from the other side L2 in the direction of the rotation center axis L. A central hole 260 is formed in the center of the circular plate 26. A plurality of blade portions 261 curved in the shape of a circular arc from the periphery of the central hole 260 and extending to the radially outer side are formed at equal angular intervals on a surface of the circular plate 26 opposed to the flange portion 45, and the circular plate 26 is fixed to the flange portion 45 via the blade portions 261. Thus, the impeller 25 connected to the cylindrical portion 40 of the rotor 4 is constituted by the flange portion 45 and the circular plate 26. In the embodiment, the circular plate 26 is inclined in a manner in which the radially outer side is positioned on the flange portion 45 side than the radially inner side.

[0035] In the rotor 4, a cylindrical radial bearing 11 is held on the radially inner side of the cylindrical portion 40, and the rotor 4 is rotatably supported to the support shaft 5 via the radial bearing 11. The end portion 51 of the support shaft 5 on the side L1 of the rotational center axis L is held in the shaft hole 65 formed on the bottom wall 63 of the resin sealing member 6. The housing 2 is provided with a receiving portion 280 that limits the movable range of the support shaft 5 to the pump chamber 20 side by facing the end portion 52 of the support shaft 5 on the pump chamber 20 side. The housing 2 is provided with three support portions 27 that extend from the inner peripheral surface of the suction pipe 21 to the motor 10 side. At the end portions of the support portions 27, the end portion 52 of the support shaft 5 on the other side L2 of the rotational center axis L is positioned inside the cylindrical portion 28, and the receiving portion 280 is formed by the bottom portion of the cylindrical portion 28 on the other side L2 of the rotational center axis L. The end portion 52 of the support shaft 5 is provided with a circular ring-shaped thrust bearing 12, and the thrust bearing 12 is positioned between the radial bearing 11 and the cylindrical portion 28. At least a part of the end portion 51 of the support shaft 5 and the shaft hole 65 is formed in a D-shaped cross section, and the end portion 52 of the support shaft 5 and the hole of the thrust bearing 12 are formed in a D-shaped cross section. Therefore, the rotation of the support shaft 5 and the thrust bearing 12 is prevented.

[0036] The resin sealing member 6 has a first partition wall portion 61 that faces the wall surface 23 of the pump chamber 20, and a second partition wall portion 62 that is interposed between the stator 3 and the drive magnet 8. In addition, the resin sealing member 6 has a cylindrical main body portion 66 that covers the stator 3 from the radially outer side. Therefore, the resin sealing member 6 covers the stator 3 from both sides in the radial direction and both sides in the rotational center axis L direction, and is a resin portion at the time of insert molding of the stator 3 using polyphenylene sulfide (PPS) or the like.

[0037] (Detailed structure of the resin sealing member 6 and the like)

[0038] Figure 3 is a view of the pump device 1 shown in Figure 1 Figure 4 is a view of the pump device 1 shown in Figure 3 Figure 5 is an exploded perspective view of the state after the cover 18 is removed from the state shown in Figure 4 Figure 6 is an enlarged view of the connector terminal 72 and the like shown in Figure 2 Figure 7 is a view showing the state of cutting the resin sealing member 6 along the connector terminal 72 shown in Figure 2 Figure 3 , Figure 4 , Figure 5 , Figure 6 and​​​​​Figure 7 with respect to Figure 1 and Figure 2 The direction of the motor axis L is reversed upside down, and the other side L2 of the direction of the motor axis L is taken as the upper side of the drawing.

[0039] As Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 indicated, a cover 18 is fixed to the end 64 of the one side L1 of the direction of the rotation center axis L of the resin-sealed member 6. Between the cover 18 and the bottom wall 63 of the resin-sealed member 6, a substrate 19 is fixed to the resin-sealed member 6 in a posture intersecting the rotation center axis L, and the plate thickness direction of the substrate 19 faces the direction of the rotation center axis L. Therefore, the substrate 19 is covered by the cover 18 from the one side L1 of the direction of the motor axis L. On the substrate 19, a circuit and a wiring and the like that control the power supply to the coil 35 are provided.

[0040] The cover 18 is fixed to the resin-sealed member 6 by fusion. The substrate 19 is fixed to the resin-sealed member 6 by a screw 92. More specifically, a cylindrical portion 67 protruding from the bottom wall 63 toward the one side L1 of the direction of the motor axis L is formed on the resin-sealed member 6, and the screw 92 consisting of a self-tapping screw is stopped by the cylindrical portion 67 through a notch of the substrate 19.

[0041] The metal-made winding terminal 71 protruding from the stator 3 through the bottom wall 63 of the resin-sealed member 6 toward the one side L1 of the direction of the rotation center axis L and the metal-made connector terminal 72 are connected to the substrate 19 by soldering. On the winding terminal 71, a winding constituting the coil 35 is electrically connected. Therefore, the winding constituting the coil 35 is electrically connected to the substrate 19 via the winding terminal 71. The winding terminal 71 and the connector terminal 72 are simultaneously insert-molded when the stator 3 is insert-molded. Therefore, the winding terminal 71 and the connector terminal 72 are fixed to the resin-sealed member 6.

[0042] A cylindrical connector housing portion 69 is formed on the resin-sealed member 6. The connector housing portion 69 is a cylindrical protruding portion that protrudes in the resin-sealed member 6 in a direction intersecting the rotation center axis L. On the inner side of the connector housing portion 69, first end portions 721 of a plurality of connector terminals 72 protrude from the resin-sealed member 6 toward the opening direction of the connector housing portion 69. Therefore, when a connector is connected to the connector housing portion 69 to supply a signal or the like, the signal is input to the drive circuit of the substrate 19 via the connector terminals 72. As a result, a drive current is supplied from the drive circuit of the substrate 19 to each coil 35 via the winding terminal 71. Therefore, the rotor 4 rotates around the rotation center axis L. Thereby, the impeller 25 rotates inside the pump chamber 20, the inside of the pump chamber 20 becomes a negative pressure, and thus fluid is sucked into the pump chamber 20 from the suction pipe 21 and is discharged from the discharge pipe 22.

[0043] As shown in Figure 5 , Figure 6 and Figure 7 , the plurality of connector terminals 72 each include a first end portion 721, a second end portion 722 that is an end portion on the opposite side of the first end portion 721, and a fixed portion 723 that is fixed to the resin-sealed member 6 between the first end portion 721 and the second end portion 722. The second end portion 722 protrudes from the bottom wall 63 of the resin-sealed member 6 toward one side LI of the rotation center axis L. In the present embodiment, the fixed portion 723 includes a first covered portion 726 that is covered by the resin-sealed member 6 on the first end portion 721 side, and a second covered portion 727 that is covered by the resin-sealed member 6 on the second end portion 722 side, and the plurality of connector terminals 72 each include an exposed portion 725 that is exposed from the opening portion 68 of the resin-sealed member 6 toward one side LI of the rotation center axis L between the first covered portion 726 and the second covered portion 727. That is, the first covered portion 726 and the second covered portion 727 are embedded in the resin-sealed member 6, but the exposed portion 725 exposes at least a surface of one side LI of the rotation center axis L.

[0044] In the present embodiment, the exposed portions 725 of the plurality of connector terminals 72 are all exposed from one opening portion 68 of the resin-sealed member 6. Therefore, at least the surface of one side LI of the rotation center axis L and the side surface of the exposed portion 725 are exposed from the resin-sealed member 6. In addition, the connector terminals 72 are flat plate-shaped pin-shaped terminals, and the exposed portion 725 is composed of a flat plate portion 729 that is oriented in the plate thickness direction toward the rotation center axis L. In addition, in the connector terminal 72, the first covered portion 726 has a portion 728 that extends obliquely with respect to the rotation center axis L between the first end portion 721 and the exposed portion 725.

[0045] Thus, in this embodiment, each of the plurality of connector terminals 72 includes an exposed portion 725 that is exposed from the opening 68 of the resin seal member 6 toward the one side L1 in the direction of the rotation center axis L, between the first cover portion 726 and the second cover portion 727. Therefore, when the resin seal member 6 is molded, the portion corresponding to the exposed portion 725 can be positioned from the one side L1 in the direction of the rotation center axis L using a mold or the like. Consequently, the first end portion 721 and the second end portion 722 of the connector terminal 72 can be appropriately fixed by the resin seal member 6.

[0046] Furthermore, since the exposed portion 725 is formed of the flat plate portion 729 whose thickness direction faces the direction of the rotation center axis L, the connector terminal 72 can be reliably positioned.

[0047] (Detailed Structure of Cover 18, etc.)

[0048] like Figure 4 As shown, in the resin seal component 6, the connector housing portion 69 protrudes in a direction intersecting the rotation center axis L, while the outer peripheral end portion of the cover 18 is welded to the resin seal component 6. Here, when viewed from the direction of the rotation center axis L, the connector housing portion 69 does not overlap with the cover 18 and protrudes radially outward. Therefore, when the cover 18 is welded, the portion of the resin seal component 6 that avoids the connector housing portion 69 can be supported from the other side L2 in the direction of the rotation center axis L. Therefore, unlike when the resin seal component 6 is supported by the connector housing portion 69, when the cover 18 is welded, the resin seal component 6 can be easily supported from the other side L2 in the direction of the rotation center axis L, and deformation of the connector housing portion 69 is less likely to occur.

[0049] Furthermore, the cover 18 and base plate 19 each have a circular planar shape as a whole. Furthermore, they are provided with linear portions 180 and 190 formed by linearly cutting out the side where the connector housing 69 is located. This allows the base of the connector housing 69 to be positioned radially inward, and accordingly, the tip of the connector housing 69 to be positioned radially inward. Consequently, the outer diameters of the motor 10 and pump device 1 can be reduced.

[0050] [Other embodiments]

[0051] In the above embodiment, the exposed portions 725 of the plurality of connector terminals 72 are all exposed at one opening portion 68 of the resin sealing member 6, but it is preferable that a plurality of opening portions 68 that expose the exposed portions 725 of each of the plurality of connector terminals 72 be provided on the resin sealing member 6. In this case, the exposed portions 725 become a state in which only the side Ll in the direction of the rotation center axis L is exposed from the resin sealing member 6, and the side surface is covered by the resin sealing member 6. Therefore, the exposed portions 725 can also be fixed by the resin sealing member 6. In addition, even in the case of adopting a structure in which the side surface of the exposed portions 725 is covered by the resin sealing member 6, at the time of insert molding, only the side Ll in the direction of the rotation center axis L of the portion corresponding to the exposed portions 725 is overlapped with a mold or the like, and therefore, it is possible to simplify the structure of the mold.

[0052] In the above embodiment, the motor 10 used by the pump device 1 is exemplified, but the present application can also be applied to a motor mounted on another device.

[0053] Symbol explanation

[0054] 1…pump device; 2…housing; 3…stator; 4…rotor; 5…support shaft; 6…resin sealing member; 8…drive magnet; 10…motor; 18…cover; 19…base plate; 20…pump chamber; 25…impeller; 31…stator core; 32, 33…insulator; 35…coil; 40…cylindrical portion; 45…flange portion; 60…casing; 61…first partition wall portion; 62…second partition wall portion; 63…bottom wall; 65…shaft hole; 66…main body portion; 67…columnar portion; 68…opening portion; 69…connector casing portion; 71…winding terminal; 72…connector terminal; 92…screw; 180, 190…straight portion; 721…first end portion; 722…second end portion; 723…fixed portion; 725…exposed portion; 726…first covering portion; 727…second covering portion; 728…portion; 729…flat portion; L…rotation center axis.

Claims

1. A motor, characterized in that: have: a stator having a coil; a resin sealing member covering the stator and including a cylindrical connector housing portion opening in a direction intersecting the direction of the rotation center axis of the rotor; a plurality of connector terminals, each comprising a first end portion, a second end portion, and a fixed portion, wherein the first end portion protrudes from the resin sealing component in a direction toward the opening of the connector housing portion within the connector housing portion, the second end portion protrudes from the resin sealing component in a direction toward the rotational center axis on a side opposite to the first end portion, and the fixed portion is fixed to the resin sealing component between the first end portion and the second end portion; as well as a substrate, the coil and the second end portion being electrically connected to the substrate, The fixed portion includes: a first covering portion covered by the resin sealing member around the first end portion; and a second covering portion covered by the resin sealing member around the second end portion. Each of the plurality of connector terminals includes an exposed portion that is exposed from an opening of the resin sealing member between the first covering portion and the second covering portion toward one side in the direction of the rotation center axis. The exposed portion is exposed entirely in a width direction perpendicular to a direction extending from the first end portion to the second end portion toward one side in the direction of the rotation center axis.

2. The motor according to claim 1, wherein The exposed portion is formed of a flat plate portion whose thickness direction faces the rotation center axis.

3. The motor according to claim 1 or 2, characterized in that The first covering portion includes a portion extending obliquely with respect to the rotation center axis between the first end portion and the exposed portion.

4. The motor according to claim 1 or 2, characterized in that A plurality of the openings are provided so as to expose the exposed portion for each of the plurality of connector terminals.

5. The motor according to claim 1 or 2, characterized in that: The substrate is fixed to the resin sealing member with its thickness direction facing the rotation center axis. A winding terminal to which a winding constituting the coil is connected protrudes from the resin sealing member toward one side in the direction of the rotation center axis and is connected to the substrate.

6. The motor according to claim 5, characterized in that A cover is provided, the cover covering the substrate from the side opposite to the resin sealing member, and the outer peripheral end portion of the cover is welded to the resin sealing member, The connector housing portion is formed of a cylindrical protrusion that protrudes radially outward without overlapping with the cover when viewed from the rotation center axis direction.

7. The motor according to claim 6, characterized in that The substrate has a circular planar shape as a whole, The substrate is provided with a straight portion formed by linearly cutting away a side where the connector housing portion is located.

8. A pump device, characterized in that: have: The motor according to any one of claims 1 to 7; and The impeller is driven to rotate by the motor.

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