Motors and pumps

Abstract

To provide a motor capable of properly fixing a gap between a first end and a second end which are oriented in mutually different directions, of a connector terminal with a resin seal member, and a pump device.SOLUTION: A connector terminal 72 comprises a fixed part 723 fixed to a resin seal member 6 between a first end 721 protruding from the resin seal member 6 inside of a cylindrical connector housing part 69 which is opened in a direction crossing a direction of a rotation center axial line L, and a second end 722 protruding from the resin seal member 6 toward one side L1 of the rotation center axial line L at an opposite side of the first end 721. The fixed part 723 includes a first coating part 726 the periphery of which is covered by the resin seal member 6 at the side of the first end 721, and a second coating part 727 the periphery of which is covered by the resin seal member 6 at the side of the second end 722. The connector terminal 72 comprises an exposed part 725 exposed from an opening 68 of the resin seal member 6 between the first coating part 726 and the second coating part 727.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a motor and a pump device in which a connector housing portion is provided in a resin sealing member that covers a stator. [Background technology]

[0002] In a motor in which a cylindrical connector housing portion is provided in a resin sealing member that covers a stator, the connector housing portion opens in a direction perpendicular to the central axis of rotation, and inside the connector housing portion, a first end of a connector terminal protrudes from the resin sealing member. In addition, a winding terminal to which a winding that constitutes a stator coil is connected protrudes to one side of the central axis of rotation and is connected to a board arranged perpendicular to the central axis of rotation. Therefore, an end of the connector terminal opposite to the first end is a second end protruding toward one side of the central axis of rotation, and the second end is connected to the board. Therefore, in the connector terminal, a portion between the first end and the second end is a fixed portion covered with a resin sealing member (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6550698 Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology described in Patent Document 1, the entire area between the first end and the second end, which face in different directions, is covered by the resin sealing member, so when molding the resin sealing member, the fixed part between the first end and the second end cannot be positioned by a mold. Therefore, even if the first end and the second end are positioned when molding the resin sealing member, the position of the fixed part is likely to shift, and the connector terminal is difficult to properly hold in the resin sealing member.

[0005] In view of the above problems, an object of the present invention is to provide a motor and a pump device that can properly fix a first end and a second end of a connector terminal facing in different directions using a resin sealing member. [Means for solving the problem]

[0006] In order to solve the above problem, the motor of the present invention has a stator with a coil, a resin sealing member covering the stator and having a cylindrical connector housing portion that opens in a direction intersecting the direction of the rotation center axis of a rotor, a plurality of connector terminals having a first end portion protruding from the resin sealing member toward the 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 in the direction of the rotation center axis on the opposite side to the first end portion, and a fixed portion fixed to the resin sealing member between the first end and the second end, and a substrate to which the coil and the second end are electrically connected, the fixed portion comprising a first covering portion that is surrounded by the resin sealing member on the first end side and a second covering portion that is surrounded by the resin sealing member on the second end side, and each of the plurality of connector terminals has an exposed portion that is exposed from the resin sealing member toward one side in the direction of the rotation center axis between the first covering portion and the second covering portion.

[0007] In the present invention, the connector terminal has a first end portion protruding from the resin sealing member in a direction intersecting the rotation central axis, and a second end portion protruding from the resin sealing member toward one side in the rotation central axis direction. The connector terminal has a first end portion and a second end portion, and a fixed portion fixed to the resin sealing member between the first end portion and the second end portion. The fixed portion has a first covering portion covered with the resin sealing member on the first end portion side and a second covering portion covered with the resin sealing member on the second end portion side, and each of the multiple connector terminals has an exposed portion exposed from 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, so that 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 properly fixed by the resin sealing member.

[0008] In the present invention, the exposed portion may be a flat plate portion having a thickness direction aligned with the rotation axis direction, thereby making it possible to reliably position the connector terminal.

[0009] In the present invention, a mode can be adopted in which the first covering portion has a portion extending obliquely with respect to the central axis of rotation between the first end portion and the exposed portion.

[0010] In the present invention, a mode may be adopted in which a plurality of the openings are provided so as to expose the exposed portions for each of the plurality of connector terminals.

[0011] In the present invention, an embodiment can be adopted in which only a surface of the exposed portion on one side of the rotation central axis is exposed from the resin member, and a side surface of the connector terminal is covered by the resin sealing member.

[0012] In the present invention, a configuration can be adopted in which the substrate is fixed to the resin sealing member with its plate thickness direction facing the direction of the central axis of rotation, and winding terminals to which the windings that constitute the coil are connected protrude from the resin sealing member toward one side in the direction of the central axis of rotation and are connected to the substrate.

[0013] In the present invention, an embodiment can be adopted in which the substrate is covered from the side opposite to the resin sealing member and the outer circumferential end is welded to the resin sealing member, and the connector housing portion has a cylindrical protrusion that protrudes radially outward without overlapping with the cover when viewed from the direction of the central axis of rotation. According to this embodiment, when the cover is welded, the portion of the resin sealing member that avoids the connector housing portion can be supported from the other side in the direction of the central axis of rotation.

[0014] In the present invention, the board and the cover may have a generally circular planar shape, and the board and the cover may each have a linear portion cut out on the side where the connector housing portion is located. According to this aspect, the tip of the connector housing portion can be positioned radially inward, thereby making it possible to reduce the outer diameter of the motor.

[0015] The motor according to the present invention can be used in a pump device, in which case the pump device has an impeller that is driven to rotate by the motor. Effect of the Invention

[0016] In the present invention, the connector terminal has a first end protruding from the resin sealing member in a direction intersecting the rotation central axis and a second end protruding from the resin sealing member toward one side in the rotation central axis direction, and has a fixed portion fixed to the resin sealing member between the first end and the second end. The fixed portion has a first covering portion covered with the resin sealing member on the first end side and a second covering portion covered with the resin sealing member on the second end side, and each of the multiple connector terminals is protruding from the resin sealing member in the rotation central axis direction between the first covering portion and the second covering portion. Since the connector terminal has an exposed portion that is exposed toward one side, when molding the resin sealing member, the portion corresponding to the exposed portion can be positioned using a mold, etc. Therefore, the first end and the second end of the connector terminal can be properly fixed by the resin sealing member. [Brief description of the drawings]

[0017] [Figure 1] 1 is a perspective view showing an embodiment of a pump device and a motor to which the present invention is applied; [Diagram 2] FIG. 2 is a vertical cross-sectional view of the pump device and the motor shown in FIG. [Diagram 3] 2 is a perspective view of the pump device shown in FIG. 1 as viewed from one side in the direction of the central axis of rotation. [Figure 4] FIG. 4 is an exploded perspective view of the state shown in FIG. 3 with a cover removed. [Diagram 5] 5 is an exploded perspective view of the state shown in FIG. 4 with the substrate removed. [Figure 6] 3 is an explanatory diagram showing an enlarged view of the connector terminals etc. shown in FIG. 2; [Figure 7] 3 is an explanatory diagram showing a state in which the resin sealing member is cut along the connector terminal shown in FIG. 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, a motor 10 and a pump device 1 according to an embodiment of the present invention will be described with reference to the drawings. In the following description, the direction of the rotational axis L means the direction in which the rotational axis L extends, the radial direction on the radially inner side and the radially outer side means the radial direction centered on the rotational axis L, and the circumferential direction means the rotational direction centered on the rotational axis L.

[0019] (Overall composition) Fig. 1 is a perspective view showing one embodiment of a pump device 1 and a motor 10 to which the present invention is applied. Fig. 2 is a vertical cross-sectional view of the pump device 1 and the motor 10 shown in Fig. 1. In Figs. 1 and 2, the pump device 1 has a case 2 having an intake port 21a and a discharge port 22a, a motor 10 disposed on one side L1 of the case 2 in the direction of a central axis L of rotation, and an impeller 25 disposed in a pump chamber 20 inside the case 2, and the impeller 25 is driven to rotate around the central axis L of rotation by the motor 10.

[0020] The motor 10 includes a cylindrical stator 3, a rotor 4 arranged inside the stator 3, a resin sealing member 6 serving as a housing 60 that covers the stator 3, and a round bar-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 this embodiment, the fluid is liquid, and the pump device 1 is used under conditions where the environmental temperature and fluid temperature are likely to change.

[0021] The case 2 constitutes a wall surface 23 on the other side L2 of the pump chamber 20 in the direction of the rotation center axis L, and a side wall 29 extending in the circumferential direction. The case 2 includes a suction pipe 21 extending along the rotation center axis L and a discharge pipe 22 extending in a direction perpendicular 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 their ends. The suction pipe 21 is provided concentrically with the rotation center axis L.

[0022] In the motor 10, the stator 3 has a stator core 31, insulators 32, 33 held by the stator core 31, and a coil 35 wound around the stator core 31 with the insulators 32, 33 interposed therebetween.

[0023] The rotor 4 has a cylindrical portion 40 that extends from a position facing the stator 3 on the radial inside toward the pump chamber 20 along the central axis of rotation L, and the cylindrical portion 40 opens at the pump chamber 20. A cylindrical drive magnet 8 is held on the outer circumferential surface of the cylindrical portion 40 so as to face the stator 3 on the radial inside. The drive magnet 8 is, for example, a neodymium bonded magnet.

[0024] In the rotor 4, a disk-shaped flange portion 45 is formed at the end of the other side L2 of the rotation central axis L direction of the cylindrical portion 40, and the disk 26 is connected to the flange portion 45 from the other side L2 of the rotation central axis L direction. A central hole 260 is formed in the center of the disk 26. A plurality of blade portions 261 are formed at equal angular intervals on the surface of the disk 26 facing the flange portion 45, and extend radially outward while curving in an arc from the periphery of the central hole 260, and the disk 26 is fixed to the flange portion 45 via the blade portions 261. Therefore, the flange portion 45 and the disk 26 form the impeller 25 connected to the cylindrical portion 40 of the rotor 4. In this embodiment, the disk 26 is inclined so that the radially outer side is located closer to the flange portion 45 than the radially inner side.

[0025] In the rotor 4, a cylindrical radial bearing 11 is held on the radial inside of the cylindrical portion 40, and the rotor 4 is rotatably supported by the support shaft 5 via the radial bearing 11. An end portion 51 on one side L1 in the direction of the rotation central axis L of the support shaft 5 is held in an axial hole 65 formed in a bottom wall 63 of the resin sealing member 6. In the case 2, a receiving portion 280 is formed on the side of the pump chamber 20, facing the end portion 52 on the pump chamber 20 side of the support shaft 5, and limiting the movable range of the support shaft 5 toward the pump chamber 20 side. The case 2 is provided with three support portions 27 extending from the inner peripheral surface of the suction pipe 21 to the motor 10 side. At the end of the support portion 27, a tube portion 28 is formed in which an end portion 52 on the other side L2 in the direction of the rotation central axis L of the support shaft 5 is located inside, and the receiving portion 280 is formed by the bottom of the other side L2 in the direction of the rotation central axis L of the tube portion 28. An annular thrust bearing 12 is attached to the end 52 of the support shaft 5, and the thrust bearing 12 is located between the radial bearing 11 and the cylindrical portion 28. At least a portion of the end 51 of the support shaft 5 and the shaft hole 65 is formed to have a D-shaped cross section, and the end 52 of the support shaft 5 and the hole of the thrust bearing 12 are also formed to have a D-shaped cross section. Therefore, the support shaft 5 and the thrust bearing 12 are prevented from rotating.

[0026] The resin sealing member 6 has a first partition portion 61 facing the wall surface 23 of the pump chamber 20, and a second partition portion 62 interposed between the stator 3 and the drive magnet 8. The resin sealing member 6 also has a cylindrical body portion 66 that covers the stator 3 from the outside in the radial direction. Therefore, the resin sealing member 6 covers the stator 3 from both sides in the radial direction and both sides in the direction of the central axis L of rotation, and is a resin portion formed when the stator 3 is insert-molded using polyphenylene sulfide (PPS) or the like.

[0027] (Detailed configuration of resin sealing member 6, etc.) Fig. 3 is a perspective view of the pump device 1 shown in Fig. 1 as viewed from one side L1 in the direction of the rotational central axis L. Fig. 4 is an exploded perspective view of the pump device 1 shown in Fig. 3 with the cover 18 removed. Fig. 5 is an exploded perspective view of the pump device 1 shown in Fig. 4 with the board 19 removed. Fig. 6 is an explanatory view showing an enlarged view of the connector terminal 72 and the like shown in Fig. 2. Fig. 7 is an explanatory view showing the resin sealing member 6 cut along the connector terminal 72 shown in Fig. 2. Note that Figs. 3, 4, 5, 6, and 7 are inverted upside down in the direction of the motor axis L compared to Figs. 1 and 2, and the other side L2 in the direction of the motor axis L is the upper side of the drawings.

[0028] 2, 3, 4, 5, and 6, a cover 18 is fixed to an end portion 64 on one side L1 in the direction of the rotation axis L of the resin sealing member 6 from the one side L1 in the direction of the rotation axis L. Between the cover 18 and a bottom wall 63 of the resin sealing member 6, a board 19 is fixed to the resin sealing member 6 in a position intersecting the rotation axis L, and the board thickness direction of the board 19 faces the direction of the rotation axis L. Therefore, the board 19 is covered by the cover 18 from the one side L1 in the direction of the motor axis L. Circuits, wiring, and the like for controlling power supply to the coil 35 are provided on the board 19.

[0029] The cover 18 is fixed to the resin sealing member 6 by welding. The substrate 19 is fixed to the resin sealing member 6 by screws 92. More specifically, the resin sealing member 6 has a bottom wall A columnar portion 67 is formed protruding from 63 toward one side L1 in the direction of the motor axis L, and a screw 92 made of a tapping screw is fastened to the columnar portion 67 through a notch in the base plate 19.

[0030] A metallic winding terminal 71, which penetrates the bottom wall 63 of the resin sealing member 6 from the stator 3 and protrudes to one side L1 in the direction of the central axis of rotation L, and a metallic connector terminal 72 are connected to the substrate 19 by soldering. The winding that constitutes the coil 35 is electrically connected to the winding terminal 71. Therefore, the winding that constitutes 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 sealing member 6.

[0031] A cylindrical connector housing portion 69 is formed in the resin sealing member 6. The connector housing portion 69 is a cylindrical protruding portion that protrudes in a direction intersecting the rotation center axis L in the resin sealing member 6. Inside the connector housing portion 69, first ends 721 of a plurality of connector terminals 72 protrude from the resin sealing member 6 toward the opening direction of the connector housing portion 69. Therefore, when a connector is connected to the connector housing portion 69 and a signal or the like is supplied, the signal is input to the drive circuit of the board 19 via the connector terminal 72. As a result, a drive current is supplied to each coil 35 from the drive circuit of the board 19 via the winding terminal 71. Therefore, the rotor 4 rotates around the rotation center axis L. As a result, the impeller 25 rotates in the pump chamber 20, and the inside of the pump chamber 20 becomes negative pressure, so that the fluid is sucked into the pump chamber 20 from the suction pipe 21 and discharged from the discharge pipe 22.

[0032] As shown in FIG. 5, FIG. 6, and FIG. 7, each of the connector terminals 72 includes a first end 721, a second end 722 that is an end opposite to the first end 721, and a fixed portion 723 that is fixed to the resin sealing member 6 between the first end 721 and the second end 722. The second end 722 protrudes from the bottom wall 63 of the resin sealing member 6 toward one side L1 in the direction of the central axis L of rotation. In this embodiment, the fixed portion 723 includes a first covering portion 726 that is covered with the resin sealing member 6 on the first end 721 side, and a second covering portion 727 that is covered with the resin sealing member 6 on the second end 722 side, and each of the connector terminals 72 includes an exposed portion 725 that is exposed from the opening 68 of the resin sealing member 6 toward one side L1 in the direction of the central axis L of rotation between the first covering portion 726 and the second covering portion 727. That is, the first covered portion 726 and the second covered portion 727 are embedded in the resin sealing member 6, but at least the surface of the exposed portion 725 on one side L1 in the direction of the rotational center axis L is exposed.

[0033] In this embodiment, all of the exposed portions 725 of the multiple connector terminals 72 are exposed at one opening 68 of the resin sealing member 6. Therefore, at least a surface on one side L1 in the direction of the rotation axis L and a side surface of the exposed portion 725 are exposed from the resin sealing member 6. Moreover, the connector terminal 72 is a flat pin-shaped terminal, and the exposed portion 725 is made of a flat portion 729 whose plate thickness direction faces the direction of the rotation axis L. Moreover, in the connector terminal 72, the first covering portion 726 has a portion 728 extending obliquely with respect to the rotation axis L between the first end portion 721 and the exposed portion 725.

[0034] In this manner, in this embodiment, each of the multiple connector terminals 72 has an exposed portion 725 exposed from the opening 68 of the resin sealing member 6 between the first covering portion 726 and the second covering portion 727 toward one side L1 in the direction of the rotation center axis L, so that when the resin sealing member 6 is molded, the portion corresponding to the exposed portion 725 can be positioned from one side L1 in the direction of the rotation center axis L by a mold or the like. Therefore, the first end portion 721 and the second end portion 722 of the connector terminal 72 can be properly fixed by the resin sealing member 6.

[0035] Moreover, since the exposed portion 725 is made of the flat plate portion 729 whose plate thickness direction faces the direction of the rotation center axis L, the connector terminal 72 can be reliably positioned.

[0036] (Detailed configuration of cover 18, etc.) As shown in FIG. 4, the connector housing portion 69 of the resin sealing member 6 protrudes in a direction intersecting the rotation axis L, while the outer peripheral end of the cover 18 is welded to the resin sealing member 6. Here, the connector housing portion 69 protrudes radially outward without overlapping with the cover 18 when viewed from the direction of the rotation axis L. Therefore, when the cover 18 is welded, the part of the resin sealing member 6 that avoids the connector housing portion 69 can be supported from the other side L2 in the direction of the rotation axis L. Therefore, unlike the case where the resin sealing member 6 is supported by the connector housing portion 69, when the cover 18 is welded, the resin sealing member 6 can be easily supported from the other side L2 in the direction of the rotation axis L, and deformation of the connector housing portion 69 is unlikely to occur.

[0037] Also, while the cover 18 and the board 19 each have a circular planar shape as a whole, the cover 18 and the board 19 are provided with linear portions 180, 190 that are linearly cut out on the side where the connector housing portion 69 is located. Therefore, the base portion of the connector housing portion 69 can be positioned radially inward, and the tip portion of the connector housing portion 69 can be positioned radially inward accordingly. Therefore, the outer diameter dimensions of the motor 10 and the pump device 1 can be reduced.

[0038] [Other embodiments] In the above embodiment, all the exposed portions 725 of the connector terminals 72 are exposed through one opening 68 of the resin sealing member 6. However, it is preferable that the resin sealing member 6 is provided with a plurality of openings 68 that expose the exposed portions 725 for each of the connector terminals 72. In this case, only the surface of one side L1 in the direction of the rotation axis L of the exposed portion 725 is exposed from the resin sealing member 6, and the side surface is covered by the resin sealing member 6. Therefore, the exposed portion 725 can also be fixed by the resin sealing member 6. Even if the side surface of the exposed portion 725 is covered by the resin sealing member 6, it is only necessary to overlap a mold or the like with respect to the surface of one side L1 in the direction of the rotation axis L of the portion corresponding to the exposed portion 725 during insert molding, so that the structure of the mold can be simplified.

[0039] In the above embodiment, the motor 10 used in the pump device 1 has been illustrated, but the present invention may also be applied to motors mounted on other devices. [Explanation of symbols]

[0040] Reference Signs List 1...pump device, 2...case, 3...stator, 4...rotor, 5...support shaft, 6...resin sealing member, 8...drive magnet, 10...motor, 18...cover, 19...substrate, 20...pump chamber, 25...impeller, 31...stator core, 32, 33...insulator, 35...coil, 40...cylindrical portion, 45...flange portion, 60...housing, 61...first partition portion, 62...second partition portion , 63...bottom wall, 65...shaft hole, 66...body portion, 67...columnar portion, 68...opening, 69...connector housing 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 coated portion, 727...second coated portion, 728...portion, 729...flat portion, L...rotation center axis

Claims

1. A stator having a coil; a resin sealing member covering the stator and including a cylindrical connector housing portion that opens in a direction intersecting a direction of a rotational center axis of the rotor; a plurality of connector terminals each including a first end portion protruding from the resin sealing member inside the connector housing portion toward an opening direction of the connector housing portion, a second end portion protruding from the resin sealing member toward one side in the direction of the rotation center axis on the opposite side 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; a substrate to which the coil and the second end are electrically connected; having the fixed portion includes a first covering portion that is surrounded by the resin sealing member on the first end portion side, and a second covering portion that is surrounded by the resin sealing member on the second end portion side, 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 motor is characterized in that the exposed portion is exposed toward one side of the rotation center axis direction in a width direction perpendicular to a direction extending from the first end to the second end.

2. 2. The motor according to claim 1, The motor is characterized in that the exposed portion is made of a flat plate portion whose plate thickness direction is oriented in the direction of the central axis of rotation.

3. 3. The motor according to claim 1, The motor, characterized in that the first covering portion has a portion extending obliquely with respect to the central axis of rotation between the first end and the exposed portion.

4. The motor according to any one of claims 1 to 3, The motor is characterized in that a plurality of the openings are provided so as to expose the exposed portions for each of the plurality of connector terminals.

5. The motor according to any one of claims 1 to 4, the substrate is fixed to the resin sealing member with a plate thickness direction oriented in the direction of the central axis of rotation, a winding terminal to which the winding that constitutes the coil is connected protrudes from the resin sealing member toward one side in the direction of the central axis of rotation and is connected to the substrate.

6. 6. The motor according to claim 5, a cover that covers the substrate from the side opposite to the resin sealing member and has an outer peripheral edge that is welded to the resin sealing member; The motor according to claim 1, wherein the connector housing portion comprises a cylindrical protrusion that protrudes radially outward without overlapping with the cover when viewed from the direction of the central axis of rotation.

7. 7. The motor according to claim 6, the substrate has an overall circular planar shape, The motor is characterized in that the substrate has a straight portion that is linearly cut out and faces a base portion of the connector housing portion.

8. A pump device comprising the motor according to any one of claims 1 to 7, A pump device comprising an impeller that is rotationally driven by the motor.

Images