Circuit-integrated motor

Abstract

To provide a circuit-integrated motor that can achieve a sealed substrate compartment with a small number of parts and assembly man-hours.SOLUTION: A circuit-integrated motor 100 comprises: a motor 10; a control substrate 40 for controlling the motor 10; a casing 50 covering at least of the control substrate 40. The casing 50 includes: a metal bulkhead section 60 that divides the space for the control substrate 40 from a substrate compartment 51 and the space for the motor; a first resin section 110 integrally molded with the bulkhead section 60 by insert molding using the bulkhead section 60 as an insert parts; and a cover section 90 including a second resin section 120 that is welded to the first resin section 110 and that together with the bulkhead section 60 and the first resin section 110 defines the substrate compartment 51. The peripheral wall of the substrate compartment 51 is formed by the first and second resin sections 110 and 120 welded to each other.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a circuit-integrated motor in which a motor and a control unit (control board) are integrated into a single module. [Background technology]

[0002] Conventionally, there has been known a circuit-integrated motor in which a motor and a control unit are integrated into a single module. In a circuit-integrated motor, the control board is generally housed in a board housing chamber that is isolated from the motor arrangement space.

[0003] For example, Patent Document 1 describes a drive device (circuit-integrated motor) in which a motor and a controller including a control board and a power board are integrated together. In the drive device described in Patent Document 1, a control board is attached to a heat sink fastened to a motor case from the motor side, and a power board is attached to the opposite side to the motor. The control board and the power board are covered by a resin cylindrical member that surrounds the heat sink and a cover that is fastened to the cylindrical member.

[0004] As another example of a circuit-integrated motor, Patent Document 2 describes a drive device in which a control board is disposed above a motor housing and motor wires protruding from the motor housing are connected to the control board. In the drive device described in Patent Document 2, a ring-shaped resin connector surrounding a control board is attached to the motor housing via a first adhesive, and a cover covering the control board from above is attached to the connector via a second adhesive. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2012-143036 A [Patent Document 2] Patent No. 7211259 specification Summary of the Invention [Problem to be solved by the invention]

[0006] In order to maintain the reliability of the control board over a long period of time, it is desirable to prevent foreign matter from entering the board housing chamber that houses the control board.

[0007] When a substrate accommodating chamber is formed by a tubular member and a cover that are fastened together by screws, as in the circuit-integrated motor described in Patent Document 1, the intrusion of foreign matter into the substrate accommodating chamber can be prevented by providing a sealing member between the tubular member and the cover. However, in order to realize a board accommodation chamber with a sealed structure, the number of parts and the number of assembly steps increase.

[0008] In the case of the circuit-integrated motor described in Patent Document 2, when the cover is attached to the annular connector via an adhesive, the adhesive itself functions as a seal and prevents foreign matter from entering the substrate housing chamber. However, it takes time to apply and cure the adhesive.

[0009] In view of the above circumstances, an object of at least some embodiments of the present invention is to provide a circuit-integrated motor that can achieve a hermetic seal of a board accommodating chamber with a small number of parts and assembly steps. [Means for solving the problem]

[0010] A circuit-integrated motor according to at least some embodiments of the present invention comprises: A motor; A control board for controlling the motor; a casing that covers at least the control board; Equipped with The casing is a metal partition wall that separates a board housing chamber for housing a control board from a space for arranging the motor; a first resin portion integrally molded with the partition wall by insert molding using the partition wall as an insert part; a cover portion including a second resin portion welded to the first resin portion and defining a substrate accommodating chamber together with the partition portion and the first resin portion; Including, The peripheral wall of the substrate accommodating chamber is formed by a first resin part and a second resin part that are welded to each other. Effect of the Invention

[0011] According to at least some embodiments of the present invention, a partition portion for separating the board accommodating chamber from the motor arrangement space and a first resin portion are integrally provided, and the second resin portion of the cover portion is welded to the first resin portion, thereby making it possible to realize a board accommodating chamber with a sealed structure with a reduced number of parts and assembly labor. [Brief description of the drawings]

[0012] [Figure 1] 1 is a cross-sectional view showing a schematic diagram of a circuit-integrated motor according to an embodiment; [Diagram 2] 1 is a cross-sectional view showing a schematic diagram of a circuit-integrated motor according to an embodiment; [Diagram 3] 1 is a perspective view showing an overall configuration of a circuit-integrated motor according to an embodiment; [Figure 4] FIG. 2 is a perspective view showing a state before a cover is attached to the circuit-integrated motor according to the embodiment; [Diagram 5] 1 is a perspective view showing a partition wall portion of an insert-molded product of a circuit-integrated motor according to one embodiment, separated from other portions; [Figure 6] 1 is a perspective view showing an overall configuration of a circuit-integrated motor according to an embodiment; [Figure 7] FIG. 2 is a perspective view showing a state before a cover is attached to the circuit-integrated motor according to the embodiment; [Figure 8] 1 is a perspective view showing a partition wall portion of an insert-molded product of a circuit-integrated motor according to one embodiment, separated from other portions; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as the embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present invention.

[0014] Hereinafter, a circuit-integrated motor according to some embodiments will be described with reference to the drawings. The circuit-integrated motor described below is a motor and a control unit (control board) integrated into one module, and may be, for example, a motor device for driving a radiator fan, a motor for driving a vacuum pump, or other in-vehicle motor device. In this specification, unless otherwise specified, the terms "axial direction," "radial direction," and "circumferential direction" refer to the axial direction, radial direction, and circumferential direction, respectively, of the circuit-integrated motor.

[0015] Fig. 1 is a cross-sectional view showing a circuit-integrated motor 100A according to one embodiment, and Fig. 2 is a cross-sectional view showing a circuit-integrated motor 100B according to another embodiment. Each of circuit-integrated motors 100A to 100B shown in FIG. 1 and FIG. 2 is a specific example of a circuit-integrated motor 100 according to some embodiments of the present invention.

[0016] 1 and 2, in some embodiments, a circuit-integrated motor 100 (100A, 100B) includes a motor 10, a control board 40 for controlling the motor 10, and a casing 50 that covers at least the control board 40. The control board 40 is accommodated in a board accommodation chamber 51 formed by the casing 50.

[0017] The motor 10 includes a stator 20 including a stator core 22, and a rotor 30 having a magnet 32 ​​arranged to face the stator core 22 in the radial direction. A stator coil 24 is wound around the stator core 22. The stator coil 24 is electrically connected to a control board 40. When a current flows through the stator coil 24 via the control board 40, the rotor 30 rotates in the circumferential direction due to the interaction between the magnetic field generated by the stator coil 24 and the magnet 32. The power supplied to the stator coil 24 is controlled by an inverter circuit included in the control board 40.

[0018] In the embodiment shown in FIGS. 1 and 2, the circuit-integrated motor 100 (100A, 100B) is an outer rotor type motor in which the magnet 32 ​​of the rotor 30 is located on the outer periphery of the stator core 22 of the stator 20. Specifically, as shown in FIG. 1 and FIG. 2, the stator 20 includes a stator core 22 around which the stator coil 24 is wound, a support shaft 26 that rotatably supports the rotor 30 via a bearing 34, and a base 28 attached to the casing 50. The base 28 is attached to a lower portion of the casing 50 (a partition wall portion 60 described later) using a fastening member (e.g., a bolt) not shown. The stator core 22 and the support shaft 26 each extend in the axial direction from the base 28 toward the opposite side to the casing 50. The stator core 22 is located radially outside the support shaft 26 so as to surround the support shaft 26. The magnet 32 ​​of the rotor 30 is disposed on the outer circumferential side of the stator core 22. The rotor 30 has a double cylindrical structure including an outer circumferential wall 36 and an inner circumferential wall 37, and the outer circumferential wall 36 and the inner circumferential wall 37 are connected to each other via a bottom wall 38. The magnet 32 ​​is attached to the inner circumferential surface of the outer circumferential wall 36. A vent hole 39 is formed between the rotor 30 and the casing 50 (a partition wall portion 60 described later). The vent hole 39 is formed by an axial gap between an outer peripheral wall 36 of the rotor 30 and the casing 50 (a partition wall portion 60 described later).

[0019] In another embodiment, the circuit-integrated motor 100 is an inner rotor type motor in which the rotor 30 is located on the inner circumference side of the stator 20. The inner rotor type circuit-integrated motor 100 has a basic configuration common to the example shown in Figures 1 and 2, except for the positional relationship between the rotor 30 and the stator 20.

[0020] The control board 40 includes a printed wiring board 41 and a plurality of electronic devices 42 mounted on the printed wiring board 41 . The electronic device 42 may be a component of an inverter circuit for controlling the power supplied to the stator coil 24 of the motor 10, and may be, for example, a semiconductor element such as a FET. Alternatively, the electronic device 42 may be a passive element such as a capacitor or a coil.

[0021] 1 and 2, the control board 40 includes a heat dissipation member 44 for thermally connecting the electronic device 42 to the partition wall portion 60 as a heat sink. The heat dissipation member 44 may be a heat via, a thermally conductive grease, a thermally conductive tape, or the like. 1 and 2, the heat dissipation member 44 is provided inside the control board 40 so as to form a heat conduction path from the electronic device 42 mounted on the surface of the control board 40 opposite the partition wall portion 60 to the partition wall portion 60 serving as a heat sink. In this case, the heat dissipation member 44 may include a plurality of heat vias 43 penetrating the control board 40. In another embodiment, it is provided between the electronic device 42 and the partition portion 60 so as to form a thermal conduction path from the electronic device 42 mounted on the surface of the control board 40 facing the partition portion 60 to the partition portion 60 as a heat sink.

[0022] The control board 40 may also include a ground terminal 46 that is electrically connected to the bulkhead portion 60 . In the embodiment shown in Figures 1 and 2, a screw 47 inserted into a through hole in the control board 40 is screwed into a female thread provided in the partition portion 60 (the second convex portion 61B described later), thereby electrically connecting a ground terminal 46 provided on the surface of the control board 40 facing the partition portion 60 to the partition portion 60.

[0023] The control board 40 having the above-mentioned configuration is accommodated in a board accommodating chamber 51 formed by a casing 50. The casing 50 includes a metal partition wall portion 60 that separates the board accommodating chamber 51 for accommodating the control board 40 from a space for arranging the motor 10, a first resin portion 110 provided integrally with the partition wall portion 60, and a cover portion 90 having a second resin portion 120 welded to the first resin portion 110. The first resin portion 110 and the second resin portion 120 may be made of a thermoplastic resin. Here, the partition wall 60 and the first resin part 110 are configured by an insert molded product 200 (200A, 200B) in which the metallic partition wall 60 is partially embedded in the first resin part 110. The insert molded product 200 including the partition wall 60 and the first resin part 110 is produced by insert molding using the partition wall 60 as an insert part. Note that insert molding is a molding process in which the insert part is placed in a mold before molding, resin is injected around the insert part, and the insert part and the resin are integrated. In addition, from the viewpoint of ensuring the bonding strength between the partition portion 60 and the resin in the insert molded product 200 (200A, 200B), the bonding surface of the partition portion 60 with the resin may be roughened by laser irradiation, roughening using chemicals, anodizing, etc.

[0024] The partition portion 60 includes a board-facing surface 62 that faces the control board 40 in the axial direction, and an outer circumferential edge 64 that is provided by protruding on the side opposite the motor arrangement space (the board accommodating chamber 51 side) so as to surround the board-facing surface 62. The board-facing surface 62 of the partition portion 60 forms the bottom surface of the board accommodating chamber 51.

[0025] The substrate-facing surface 62 of the partition wall 60 may be provided with one or more types of protrusions 61 for achieving desired functions. In the embodiment shown in Figs. 1 and 2, the protrusion 61 includes a first protrusion 61A having an internal thread into which the screw 48 is screwed, a second protrusion 61B having an internal thread into which the screw 47 is screwed, and a third protrusion 61C in contact with the heat dissipation member 44. The first protrusion 61A is provided on the board-facing surface 62 to fix the control board 40 to the partition wall 60 using the screw 48. The second protrusion 61B is provided on the board-facing surface 62 to establish an electrical connection between the ground terminal 46 of the control board 40 and the partition wall 60. The third protrusion 61C is provided on the board-facing surface 62 to establish a thermal connection between the electronic device 42 and the partition wall 60. Note that the board-facing surface 62 of the partition portion 60, except for the convex portion 61, may be flat or may have a concave portion. For example, when the electronic device 42 is mounted on the surface of the control board 40 facing the board-facing surface 62, the board-facing surface 62 may have a concave portion to avoid interference with the electronic device 42. The material constituting the partition wall 60 is not particularly limited, but for example, an aluminum alloy having excellent thermal and electrical conductivity can be used.

[0026] The outer peripheral edge 64 of the partition portion 60 may be provided continuously around the entire circumference, or may have a notch formed in a portion of the circumferential range. In the exemplary embodiment shown in Fig. 1, the outer peripheral edge 64 of the partition portion 60 is provided continuously over the entire circumference including the circumferential position where the terminal 70 described below is disposed. In contrast, in the exemplary embodiment shown in Fig. 2, the outer peripheral edge 64 of the partition portion 60 has a partial notch at the circumferential position where the terminal 70 is disposed, and is discontinuous in the circumferential direction at the position of the notch.

[0027] 1 and 2, in some embodiments, the partition portion 60 has an attachment portion 66 that protrudes radially outward. The attachment portion 66 is used to install the circuit-integrated motor 100. For example, when the circuit-integrated motor 100 is an in-vehicle motor, the circuit-integrated motor 100 may be attached to the vehicle body via the attachment portion 66.

[0028] As described above, the partition wall portion 60 is provided integrally with the first resin portion 110 so as to be partially embedded in the first resin portion 110 as a part of the insert molded product 200. In the embodiment shown in Fig. 1 and Fig. 2, the first resin portion 110 is joined to the outer peripheral edge 64 of the partition wall portion 60 from the viewpoint of improving the joining strength between the metal portion and the resin portion in the insert molded product 200. A first resin portion 110 which is a resin portion of the insert molded product 200 is provided continuously in the circumferential direction so as to surround the board accommodating chamber 51. The first resin portion 110, as a part of the casing 50, partially forms the peripheral wall of the board accommodating chamber 51.

[0029] After the control board 40 is assembled to the partition wall 60 of the insert molded product 200, the cover part 90 is joined to the insert molded product 200 in order to seal the board accommodating chamber 51. The cover part 90, together with the partition wall 60 and the first resin part 110, defines the boundary of the board accommodating chamber 51 and prevents foreign matter (water droplets, dust, etc.) from entering the board accommodating chamber 51 from the outside.

[0030] 1 and 2 , in some embodiments, the cover part 90 includes a second resin part 120 welded to the first resin part 110. The first resin part 110 and the second resin part 120 form a peripheral wall of the substrate accommodating chamber 51. The substrate accommodating chamber 51 has a radial boundary formed by the first resin part 110 and the second resin part 120, and an axial boundary formed by the substrate-facing surface 62 of the partition part 60 and the inner surface of the cover part 90.

[0031] 1 and 2, the cover portion 90 is a resin cover entirely made of a resin material. In other embodiments, the cover portion 90 includes a resin portion including the second resin portion 120 and a portion made of a material other than the resin material.

[0032] The first resin portion 110 and the second resin portion 120 may be joined by, for example, spin welding, laser welding, or ultrasonic welding.

[0033] When the spin welding method is employed, it is desirable that the peripheral wall of the substrate accommodating chamber 51 formed by the first resin portion 110 and the second resin portion 120 has a circular shape. If the peripheral wall of the substrate accommodating chamber 51 is circumferential, the first resin part 110 and the second resin part 120 can be welded together using a known spin welding machine (spin welder). When using a known spin welding machine, one of the insert molded product 200 or the cover part 90 is rotated relative to the other, the first resin part 110 and the second resin part 120 are brought into contact with each other to generate frictional heat, and the first resin part 110 and the second resin part 120 are welded together using this frictional heat.

[0034] When the laser welding method is employed, the first resin portion 110 of the insert molding 200 may be formed from a light-absorbing resin, whereas the second resin portion 120 of the cover portion 90 may be formed from a light-transmitting resin. In this case, with the cover part 90 placed on the insert molded product 200, a laser beam is irradiated from above onto the joint between the first resin part 110 and the second resin part 120. The laser beam transmitted through the second resin part 120 is absorbed by the first resin part 110 near the interface between the first resin part 110 and the second resin part 120, and the vicinity of the interface is heated. In this way, the first resin part 110 and the second resin part 120 are welded together.

[0035] When the ultrasonic welding method is employed, with the cover part 90 placed on the insert molded product 200, a horn is brought into contact with the joint between the first resin part 110 and the second resin part 120 from above, and ultrasonic vibration is applied to the joint. Heat is generated near the interface between the first resin part 110 and the second resin part 120 by the ultrasonic vibration, and the first resin part 110 and the second resin part 120 are welded together.

[0036] In addition to the above configuration, in some embodiments, the circuit-integrated motor 100 includes a terminal 70 for connecting the control board 40 to an external device, and a resin terminal holder (connector housing) 80 for holding the terminal 70.

[0037] 1 and 2, the terminal 70 is a metal part provided penetrating the casing 50, and has a first end 72 located within the board accommodating chamber 51 and connected to the control board 40, and a second end 74 located outside the board accommodating chamber 51. The first end 72 of the terminal 70 is electrically connected to the circuit pattern of the control board 40 via, for example, solder 71. The second end 74 of the terminal 70 is connected to an external device via a cable (not shown). 1 and 2 , a tip 73 of a first end 72 of the terminal 70 is bent in a direction (axial direction) from the board-facing surface 62 of the partition portion 60 toward the control board 40, and is inserted into a through hole 49 provided in the control board 40. The tip 73 of the first end 72 inserted into the through hole 49 is connected to the circuit pattern of the control board 40 by solder 71.

[0038] In some embodiments, the terminal holder 80 is formed integrally with the partition 60, the terminals 70, and the first resin part 110, as shown in Fig. 1 and Fig. 2. In this case, the insert molded product 200 is produced by insert molding using the partition 60 and the terminals 70 as insert parts, and has a configuration in which the metallic partition 60 and the terminals 70 are partially embedded in the resin part (the first resin part 110 and the terminal holder 80). In other words, the terminal holder 80 is a resin part of the insert molded product 200 that is provided continuously with the first resin part 110 without any seams.

[0039] In the embodiment shown in Figures 1 and 2, the terminal holder 80 includes a base portion 82 joined to the substrate-facing surface 62 of the partition portion 60, an intermediate portion 84 located on the outer periphery of the base portion 82, and an extension portion 86 extending outside the substrate accommodating chamber 51.

[0040] A base portion 82 of the terminal holder 80 is provided on the board-facing surface 62 so as to be at least partially located within the board accommodating chamber 51. A first end portion 72 of the terminal 70 protrudes from the base portion 82 of the terminal holder 80, and a tip portion 73 of the first end portion 72 bent toward the control board 40 is inserted into the through hole 49 of the control board 40.

[0041] The intermediate portion 84 of the terminal holder 80 is joined to the outer peripheral edge 64 of the partition portion 60 . 2, the outer peripheral edge 64 of the partition portion 60 has a partial notch at a circumferential position where the terminal 70 is arranged, and the joint between the intermediate portion 84 of the terminal holder 80 and the outer peripheral edge 64 of the partition portion 60 is not shown. However, even in the embodiment shown in FIG. 2, the intermediate portion 84 of the terminal holder 80 is joined to the portion of the outer peripheral edge 64 excluding the notch (the portion adjacent to the notch in the circumferential direction).

[0042] The extension portion 86 of the terminal holder 80 extends radially outward from the intermediate portion 84 so as to be located on the opposite side of the base portion 82 with the intermediate portion 84 in between in the radial direction. The extension portion 86 of the terminal holder 80 has an engagement claw 87 with which an end of a cable for connecting to an external device can be engaged, and a recess 88 in which the second end 74 of the terminal 70 is exposed. The second end 74 of the terminal 70 extends radially outward along the extension portion 86 within the recess 88.

[0043] Next, the detailed structure of the circuit-integrated motor 100 according to some embodiments will be described with reference to FIGS. Fig. 3 to Fig. 5 are perspective views showing a circuit-integrated motor 100C according to one embodiment, Fig. 3 shows the overall configuration of the circuit-integrated motor 100C, Fig. 4 shows the state of the circuit-integrated motor 100C before the cover is attached, and Fig. 5 shows the partition wall 60 of the insert-molded product 200C separated from other parts. Fig. 6 to Fig. 8 are perspective views showing a circuit-integrated motor 100D according to another embodiment, Fig. 6 shows the overall configuration of the circuit-integrated motor 100D, Fig. 7 shows the state of the circuit-integrated motor 100D before the cover is attached, and Fig. 8 shows the partition wall 60 of the insert-molded product 200D separated from other parts. In the following, description of the parts of the circuit-integrated motors 100C and 100D that are common to the configurations described above with reference to FIGS. 1 and 2 will be simplified or omitted.

[0044] 3 to 8, in the circuit-integrated motors 100C and 100D, the terminal holder 80 and the first resin part 110 are provided integrally with the partition part 60 and the terminals 70 by insert molding using the metallic partition part 60 and the terminals 70 as insert parts. That is, in the circuit-integrated motors 100C and 100D, a part of the casing 50 is formed by an insert-molded product 200 (see FIGS. 5 and 8) in which the partition part 60 and the terminals 70, which are metallic insert parts, are partially embedded in a resin material including the terminal holder 80 and the first resin part 110. Although Figures 5 and 8 show the partition portion 60 of the insert molded product 200 separated from the other portions, in reality, the partition portion 60 forms the insert molded product 200 integrally with the other portions, and the partition portion 60 cannot be separated from the other portions without being destroyed.

[0045] 4 and 7, the control board 40 is attached to the partition wall 60 of the insert molding 200. Specifically, the control board 40 is attached to the first protrusion 61A of the partition wall 60 by screwing the screws 48 located at the corners of the control board 40 into the female threads of the first protrusion 61A of the partition wall 60. The ground terminal (ground terminal 46 in Figures 1 and 2) of the control board 40 is electrically connected to the partition wall portion 60 by screwing a screw 47 into the female thread of the second protrusion 61B (see Figures 5 and 8) of the partition wall portion 60.

[0046] In the embodiment shown in FIGS. 4 and 7, the control board 40 is electrically connected to the motor wires 25, which are the ends of the stator coil 24 of the motor 10, and the first ends 72 of the terminals 70 of the insert molding product 200. The motor wire 25 passes through an opening 202 (see Figs. 5 and 8) provided in the partition wall portion 60 of the insert molding 200, enters the board housing chamber 51 from the arrangement space of the motor 10, and the tip of the motor wire 25 is inserted into a through hole provided in the control board 40. In addition, the opening 202 has a gap around the motor wire 25 sealed with a rubber material to ensure the airtightness of the board housing chamber 51. The tip 73 of the first end 72 of the terminal 70 is bent in the axial direction from the board-facing surface 62 of the partition wall portion 60 toward the control board 40, and is inserted into the through hole 49 provided in the control board 40. The tip of the motor wire 25 protruding from the surface of the control board 40 and the tip 73 of the first end 72 of the terminal 70 are electrically connected to the circuit pattern of the control board 40 by, for example, soldering. The electronic device 42 mounted on the control board 40 is thermally connected to the partition wall 60 of the insert molded product 200 via a heat dissipation member (not shown).

[0047] As shown in FIGS. 4 and 7, a resin terminal holder (connector housing) 80 that holds the terminals 70 extends radially from the inside to the outside of the board accommodating chamber 51 as a part of the resin portion of the insert molding 200. The terminal holder 80 includes a base portion 82 located at the innermost position in the radial direction, an extension portion 86 located at the outermost position in the radial direction, and an intermediate portion 84 located between the base portion 82 and the extension portion 86. The base portion 82 is joined to the substrate-facing surface 62 of the partition portion 60 in the substrate accommodating chamber 51. The terminal holder 80 is provided integrally with a first resin portion 110 that forms the peripheral wall of the substrate accommodating chamber 51 together with the second resin portion 120 of the cover portion 90. The first resin portion 110 is provided continuously around the entire circumference. The upper end surface of the first resin portion 110 that is provided continuously around the entire circumference is a joint surface with the second resin portion 120 of the cover portion 90, and is a flat surface along a plane perpendicular to the axial direction. Also, as shown in FIG. 4, FIG. 5, FIG. 7, and FIG. 8, the upper end surface of the first resin portion 110 is circumferentially shaped with the rotation axis of the rotor 30 of the motor 10 as the center. Therefore, the first resin portion 110 and the second resin portion 120 can be joined by spin welding.

[0048] In some embodiments, as shown in FIGS. 5 and 8, the partition wall 60 of the insert molded product 200 has irregularities on the surface to be bonded to the resin, from the viewpoint of improving the strength of the insert molded product 200. Specifically, the first protrusion 61A protrudes radially inward from the outer circumferential edge 64 of the partition wall portion 60, and a recess 54 is formed in the first resin portion 110 of the insert molded product 200 at a circumferential position corresponding to the first protrusion 61A. Furthermore, a plurality of vertical ribs 65 are formed on the inner circumferential surface of the outer circumferential edge 64 of the partition wall portion 60, and a recess corresponding to the vertical ribs 65 is formed in the first resin portion 110 of the insert molded product 200. The multiple vertical ribs 65 each extend along the axial direction on the inner circumferential surface of the outer circumferential edge 64. 5, the partition portion 60 has a notch 68 provided in the outer circumferential edge 64 to allow the terminal 70 to pass therethrough, and a recess 69 provided in the board-facing surface 62 to connect to the notch 68. Therefore, the base portion 82 and the intermediate portion 84 of the terminal holder 80 of the insert molding product 200C have shapes complementary to the notch 68 and the recess 69 of the partition portion 60.

[0049] The insert-molded product 200D shown in Figure 8 is in contrast to the insert-molded product 200C, in which the outer peripheral edge 64 of the partition portion 60 has a notch 68, in that the outer peripheral edge 64 is provided continuously around the entire circumference, including the circumferential position where the terminal 70 is located. In the insert molding product 200D, the terminals 70 are embedded inside the terminal holder 80 so as to extend beyond the outer peripheral edge 64, similar to the embodiment shown in FIG.

[0050] The characteristic configurations of the circuit-integrated motors according to the above-described several embodiments can be summarized as follows.

[0051] [1] In some embodiments, the circuit-integrated motor (100) includes: A motor (10), a control board (40) for controlling the motor (10); a casing (50) that covers at least the control board (40); Equipped with The casing (50) is a metal partition wall portion (60) separating a board accommodating chamber (51) for accommodating a control board (40) from a space in which the motor is disposed; a first resin portion (110) integrally molded with the partition wall portion (60) by insert molding using the partition wall portion (60) as an insert part; a cover portion (90) including a second resin portion (120) welded to the first resin portion (110) and defining a substrate accommodating chamber (51) together with the partition portion (60) and the first resin portion (110); Including, The peripheral wall of the substrate accommodating chamber (51) is formed by a first resin part (110) and a second resin part (120) that are welded to each other.

[0052] According to the configuration [1] above, the partition portion (60) for separating the board accommodating chamber (51) from the motor arrangement space and the first resin portion (110) are integrally provided, and the second resin portion (120) of the cover portion (90) is welded to the first resin portion (110). This makes it possible to realize a board accommodating chamber (51) having a sealed structure with a small number of parts and assembly labor.

[0053] [2] In some embodiments, in the configuration of [1] above, The partition wall (60) is a board facing surface (62) facing the control board (40); an outer peripheral edge (64) that is raised toward the substrate accommodating chamber (51) so as to surround the substrate facing surface (62); Including, The first resin portion (110) is joined to the outer peripheral edge (64) of the partition portion (60).

[0054] According to the configuration [2] above, by performing the insert molding of [1] above so that the first resin portion (110) is joined to the outer peripheral edge (64) of the partition portion (60), the strength of the insert molded product (200) including the partition portion (60) and the first resin portion (110) can be improved.

[0055] [3] In some embodiments, in the configuration of [1] or [2] above, The first resin portion (110) and the second resin portion (120) define a peripheral wall of the substrate accommodating chamber (51) that is circumferentially shaped.

[0056] According to the above configuration [3], it is possible to join the second resin portion (120) of the cover portion (90) to the first resin portion (110) of the insert molded product (200) by spin welding.

[0057] [4] In some embodiments, in any one of the configurations [1] to [3] above, The circuit-integrated motor (100) includes a terminal (70) for connecting the control board (40) to an external device, The first resin portion (110) of the casing (50) is molded integrally with the partition wall portion (60) and the terminals (70) by insert molding using the partition wall portion (60) and the terminals (70) as insert parts.

[0058] In the configuration [4] above, the first resin part (110), which is the resin part of the insert molding (200), also functions as a terminal holder (80) for holding the terminals (70). This eliminates the need to fabricate a connector part in which the terminals are embedded in a resin terminal holder (connector housing) separately from the insert molding (200), thereby reducing the number of parts.

[0059] [5] In some embodiments, in any one of the configurations [1] to [4] above, The electronic device (42) of the control board (40) is thermally connected to the partition wall (60) serving as a heat sink via a heat dissipation member (44).

[0060] According to the configuration [5] above, the metal partition portion (60) for separating the substrate accommodating chamber (51) from the motor arrangement space is made to function as a heat sink, thereby making it possible to realize a circuit-integrated motor (100) with excellent reliability using a reduced number of parts.

[0061] [6] In some embodiments, in any one of the configurations [1] to [5] above, The ground terminal (46) of the control board (40) is electrically connected to the partition wall (60).

[0062] According to the configuration [6], the metal partition wall (60) for separating the board housing chamber (51) from the motor arrangement space can be used as a ground to stabilize the reference potential of the control board (40). This makes it possible to realize a highly reliable circuit-integrated motor (100) with a reduced number of parts.

[0063] [7] In some embodiments, in any one of the configurations [1] to [6] above, The partition wall (60) is made of an aluminum alloy.

[0064] According to the above configuration [7], the partition (60) made of a lightweight aluminum alloy can be used, thereby making it possible to reduce the weight of the circuit-integrated motor (100). In addition, since aluminum alloys have excellent thermal conductivity and electrical conductivity, they are suitable as materials for the partition wall portion (60) when the partition wall portion (60) is to function as a heat sink or ground, as in [5] or [6] above.

[0065] [8] In some embodiments, in any one of the configurations [1] to [7] above, The motor (10) a stator (20) including a stator core (22), attached to the partition wall (60) so as to be located on the opposite side of the partition wall (60) from the substrate accommodating chamber (51); A stator coil (24) wound around a stator core (22); a cylindrical rotor (30) disposed on an outer circumferential side of the stator core (22); a magnet (32) provided on the inner circumferential side of the rotor (30) so as to face the stator core (22) in the radial direction; Including, An air vent (39) is formed between the rotor (30) and the partition wall (60).

[0066] According to the configuration [8] above, by adopting an outer rotor type motor in which the magnets (32) of the rotor (30) are positioned on the outer periphery of the stator core (22), unlike an inner rotor type motor, a cylindrical motor housing for holding the stator on the outer periphery of the rotor is not required. Therefore, there is no need to provide an interface between the outer periphery of the partition wall (60) and the cylindrical motor housing, and the shape of the partition wall (60) can be simplified, thereby reducing the manufacturing cost of the mold for the insert molding of the above [1]. In addition, by employing an outer rotor type motor, it is possible to omit a cylindrical motor housing that is necessary in the case of an inner rotor type motor, and to form an air vent (39) between the rotor (30) and the partition wall (60). As a result, the air flowing through the air vent (39) can effectively exhaust heat generated by the control board (40) and the motor (10), which are located on both sides of the partition wall (60).

[0067] Although several embodiments of the present invention have been described above, it is of course possible to add modifications to the above-described embodiments without departing from the spirit of the present invention. 1 to 8 show a structure in which the insert molded product 200 including the partition 60, the terminal 70, the terminal holder 80, and the first resin part 110 and the cover part 90 are joined by welding the first resin part 110 and the second resin part 120, but the present invention is not limited to this example. For example, a connector part having terminals embedded in a resin terminal holder (connector housing) may be attached to the insert molded product 200 including the partition 60 and the first resin part 110 or the cover part 90. In this case, a sealant may be provided between the insert molded product 200 or the cover part 90 and the connector part to ensure the hermeticity of the board accommodating chamber 51. In addition, in this specification, the expressions "comprise," "include," or "have" a certain element are not exclusive expressions that exclude the presence of other elements. [Explanation of symbols]

[0068] 10: Motor 20: Stator 22: Stator core 24: Stator coil 30: Rotor 32: Magnet 39: Ventilation hole 40: Control board 42: Electronic Devices 44: Heat dissipation material 46: Ground terminal 50: Casing 51: Substrate storage room 60: Partition wall 62: Substrate facing surface 64: Outer edge 70: Terminal 90: Cover part 100 (100A~100D): Circuit integrated motor 110: First resin part 120: Second resin part

Claims

1. A motor; A control board for controlling the motor; a casing that covers at least the control board; Equipped with The casing comprises: a metal partition wall that separates a board accommodating chamber for accommodating the control board from a space for arranging the motor; a first resin portion integrally molded with the partition wall by insert molding using the partition wall as an insert part; a cover portion including a second resin portion welded to the first resin portion, the cover portion defining the substrate accommodating chamber together with the partition portion and the first resin portion; Including, The peripheral wall of the substrate accommodating chamber is formed by the first resin part and the second resin part that are welded to each other. Motor with integrated circuit.

2. The partition wall portion is a board facing surface facing the control board; an outer periphery that is raised toward the substrate accommodating chamber so as to surround the substrate facing surface; Including, The first resin portion is joined to the outer periphery of the partition wall. The circuit-integrated motor according to claim 1 .

3. The peripheral wall of the substrate accommodating chamber formed by the first resin portion and the second resin portion has a circular shape.

3. The circuit-integrated motor according to claim 1 or 2.

4. A terminal for connecting the control board to an external device is provided, The first resin portion of the casing is integrally molded with the partition wall portion and the terminals by the insert molding using the partition wall portion and the terminals as insert parts.

3. The circuit-integrated motor according to claim 1 or 2.

5. The electronic device of the control board is thermally connected to the partition wall portion as a heat sink via a heat dissipation member.

3. The circuit-integrated motor according to claim 1 or 2.

6. The ground terminal of the control board is electrically connected to the partition wall.

3. The circuit-integrated motor according to claim 1 or 2.

7. The partition is made of an aluminum alloy.

3. The circuit-integrated motor according to claim 1 or 2.

8. The motor is a stator including a stator core, the stator being attached to the partition wall so as to be located on the opposite side of the partition wall from the substrate accommodating chamber; A stator coil wound around the stator core; a cylindrical rotor disposed on an outer circumferential side of the stator core; a magnet provided on an inner circumferential side of the rotor so as to face the stator core in a radial direction; Including, A vent is formed between the rotor and the partition.

3. The circuit-integrated motor according to claim 1 or 2.

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