Mold motor

Abstract

This mold motor comprises: a stator; a rotor which has a rotary shaft and is rotated by a magnetic force of the stator; a mold resin which covers at least a part of the stator; a vibration-proof rubber which is an elastic body attached to an installation target to which the mold motor is installed; and at least one hard member which is disposed in the surroundings of the vibration-proof rubber and is harder than the vibration-proof rubber, wherein the vibration-proof rubber and the hard member are integrally molded to be fixed to the mold resin.

Description

Technical Field

[0001] The present disclosure relates to a molded motor.

Background Art

[0002] Motors are used in various devices including household electrical appliances. For example, a motor is used as a fan motor mounted on an outdoor unit of an air conditioner. The fan motor includes a motor having a stator and a rotor, and a rotary fan attached to the rotating shaft of the motor.

[0003] The fan motor used in the outdoor unit of the air conditioner is installed on the main body (installation object) of the outdoor unit. In this case, the fan motor is attached to the main body of the outdoor unit via a vibration-proof rubber so that the vibration generated by the fan motor is not transmitted to the outside (see Patent Documents 1 and 2). Thereby, since the vibration of the fan motor can be prevented from being transmitted to the main body of the outdoor unit, quiet operation can be realized.

[0004] As the motor in the fan motor, a molded motor in which the stator is covered with a molded resin is used. The molded motor includes, for example, a stator, a rotor disposed inside the stator, and a molded resin that covers the stator from the outside. In the molded motor, the molded resin constitutes the outer shell of the molded motor.

[0005] When installing the molded motor on the installation object via a vibration-proof rubber, the vibration-proof rubber is attached to a leg portion that protrudes outward from the side surface of the molded resin, and the vibration-proof rubber and the installation object are fixed with a screw or the like. For example, when installing a fan motor including a molded motor on the main body of the outdoor unit, the fan motor can be attached to the main body of the outdoor unit by fixing the vibration-proof rubber attached to the leg portion of the molded motor and the main body of the outdoor unit with a screw.

[0006] In this case, the vibration isolation rubber is attached to the leg portion of the mold resin after covering the stator with the mold resin to complete the stator mold. That is, the vibration isolation rubber is retrofitted to the mold resin.

[0007] However, in recent years, due to the expansion of typhoon force or the occurrence of earthquakes, there is a concern about the occurrence of an event in which the mold motor installed on the installation object through the vibration isolation rubber falls off from the installation object. In particular, since the frequency of occurrence of typhoons with extremely large forces, which occur once every few decades, is increasing, there is a strong demand for preventing a fan motor having a mold motor with the vibration isolation rubber retrofitted to the mold resin from falling off from the main body of the outdoor unit.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Patent Document 2

Summary of the Invention

[0009] The present disclosure has been made to solve such problems. An object of the present disclosure is to provide a mold motor that can suppress the mold motor from falling off from the installation object even when the mold motor is installed on the installation object using a vibration isolation rubber for noise reduction.

[0010] To achieve the above object, one aspect of the mold motor according to the present disclosure includes a stator, a rotor having a rotating shaft that rotates by the magnetic force of the stator, a mold resin that covers at least a part of the stator, an elastic body that is attached to an installation object on which the mold motor is installed, and at least one or more hard members disposed around the elastic body and harder than the elastic body, and the elastic body and the hard member are fixed to the mold resin by integral molding.

[0011] Further, the mold resin preferably has a protruding portion that protrudes outward in the radial direction, which is a direction orthogonal to the axial direction of the rotating shaft, and the elastic body and the hard member are preferably disposed on the protruding portion.

[0012] Further, the mold motor preferably includes a cylindrical member as the hard member, and the cylindrical member is preferably disposed outside the elastic body so as to surround the elastic body.

[0013] Also, a part of the cylindrical member may be embedded in the elastic body.

[0014] Further, the mold motor includes a first cylindrical member and a second cylindrical member as the hard members, the first cylindrical member is disposed outside the elastic body so as to surround the elastic body, and the second cylindrical member may be disposed inside the elastic body.

[0015] Also, at least one of the first cylindrical member and the second cylindrical member may have a part embedded in the elastic body.

[0016] Further, the hard member is preferably made of a metal material.

[0017] Also, the mold resin may be made of an unsaturated polyester resin.

[0018] Also, the elastic body may be provided with an insertion hole through which a fixing member for attaching the mold motor to the installation object is inserted.

[0019] Further, the elastic body is preferably an anti-vibration rubber that suppresses the transmission of vibration generated by the mold motor to the installation object.

[0020] Also, the anti-vibration rubber is preferably made of ethylene propylene rubber or nitrile rubber.

[0021] According to the present disclosure, even when a mold motor is installed on an object to be installed using an elastic body, it is possible to suppress the mold motor from falling off the object to be installed.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7A

Figure 7B

Figure 8

Figure 9A

Figure 9B

Figure 10

Figure 11

Figure 12A

Figure 12B

Figure 13A

Figure 13B

Figure 14A

Figure 14B

Figure 15A

Figure 15B

DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that each of the embodiments described below shows a specific example of the present disclosure. Therefore, the numerical values, components, arrangement positions and connection forms of the components, and the processes and the order of the processes shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Therefore, among the components in the following embodiments, the components not described in the independent claims indicating the highest concept of the present disclosure are described as optional components.

[0024] Note that each figure is a schematic diagram and is not necessarily drawn precisely. Also, in each figure, the same reference numerals are given to substantially the same configurations, and overlapping descriptions are omitted or simplified. Further, in this specification, the terms "upper" and "lower" do not necessarily refer to the upward direction (vertically upward) and the downward direction (vertically downward) in an absolute spatial sense.

[0025] (Embodiment) First, the overall configuration of the mold motor 1 according to the embodiment will be described with reference to FIGS. 1 to 5. FIG. 1 is a perspective view of the mold motor 1 according to the embodiment as viewed obliquely from above. FIG. 2 is a perspective view of the mold motor 1 as viewed obliquely from below. FIG. 3 is a top view of the mold motor 1. FIG. 4 is a cross-sectional view of the mold motor 1. FIG. 5 is an enlarged view of the region V surrounded by the dashed line in FIG. 4.

[0026] As shown in FIGS. 1 to 4, the mold motor 1 includes a stator 10, a rotor 20, a mold resin 30, and a mounting member 40. The rotor 20 rotates by the magnetic force of the stator 10. The mold resin 30 covers at least a part of the stator 10. The mounting member 40 is a member for installing the mold motor 1 on an object to be installed. The mold motor 1 is attached to the object to be installed (attachment object) via the mounting member 40.

[0027] The mold motor 1 further includes a first bearing 51 and a second bearing 52, and a first bracket 61 and a second bracket 62. In the mold motor 1, the mold resin 30 and the second bracket 62 constitute the outer shell of the mold motor 1.

[0028] The mold motor 1 is a brushless motor that does not use brushes. The mold motor 1 is an inner rotor type motor in which the rotor 20 is disposed inside the stator 10.

[0029] The thus configured mold motor 1 is used, for example, as a fan motor mounted on an outdoor unit of an air conditioner. When the mold motor 1 is used as a fan motor, a rotating fan is attached to the rotating shaft 21 of the mold motor 1. In this case, the object to be installed of the mold motor 1 is the main body of the outdoor unit of the air conditioner, and the mold motor 1 is attached to the main body (for example, the frame) of the outdoor unit of the air conditioner via the mounting member 40.

[0030] Hereinafter, each component of the mold motor 1 will be described in detail.

[0031] As shown in FIG. 4, the stator 10 (stator) is disposed to face the rotor 20 with a minute air gap therebetween. Specifically, the stator 10 is disposed so as to surround the rotor core 22 of the rotor 20.

[0032] The stator 10 includes a stator core 11, a coil 12, and an insulator 13.

[0033] The stator core 11 is a stator core that serves as the core of the stator 10. The stator core 11 generates a magnetic force for rotating the rotor 20. The stator core 11 is, for example, a laminate in which a plurality of electromagnetic steel sheets are laminated in the direction in which the axis C of the rotating shaft 21 of the rotor 20 extends. Note that the stator core 11 is not limited to the laminate and may be a bulk body made of a magnetic material.

[0034] The stator core 11 has an annular yoke formed so as to surround the rotor 20 and a plurality of teeth protruding from the yoke toward the rotating shaft 21. The yoke is a back yoke formed outside each tooth. Each of the plurality of teeth protruding toward the rotating shaft 21 faces the rotor core 22 of the rotor 20. The plurality of teeth extend radially in a direction orthogonal (radial direction) to the axis C of the rotating shaft 21. The plurality of teeth are arranged at equal intervals along the rotation direction of the rotating shaft 21 while forming slots between two adjacent teeth.

[0035] The plurality of coils 12 are armature windings of the stator 10 and are wound around the stator core 11. The coil 12 is a winding coil wound around the stator core 11 via an insulator 13. As an example, the coil 12 is a concentrated winding coil wound around each of the plurality of teeth of the stator core 11 and is housed in the slot of the stator core 11. Note that the coil 12 is not limited to the concentrated winding and may be a distributed winding.

[0036] The coil 12 is a three-phase winding so as to be able to rotate the rotor 20 as a three-phase synchronous motor. Specifically, the coil 12 is composed of unit coils of each of the three phases of U-phase, V-phase, and W-phase that are electrically different in phase by 120 degrees from each other. That is, the coil 12 wound around each of the teeth of the stator core 11 is energized and driven by three-phase alternating current that is energized in each of the U-phase, V-phase, and W-phase units. Thereby, a main magnetic flux as the stator 10 is generated in each tooth of the stator core 11. That is, each tooth around which the coil 12 is wound is a magnetic pole tooth and is an electromagnet that generates a magnetic force when the coil 12 is energized.

[0037] Note that the ends of the coils 12 of each phase are connected at the winding connection portion of the circuit board 70. On the circuit board 70, pattern wirings for electrically connecting a plurality of coils 12 are formed for each of the U-phase, V-phase, and W-phases. The ends of the coils 12 of each phase are electrically connected to the pattern wiring of the circuit board 70 by solder or the like.

[0038] The insulator 13 is a coil bobbin. The insulator 13 has a frame-shaped frame portion around which the coil 12 is wound. The frame portion of the insulator 13 is an insulating frame that covers the stator core 11. Specifically, the frame portion of the insulator 13 is provided so as to cover the teeth of the stator core 11. The insulator 13 is provided on each of a plurality of teeth, but is not limited thereto. The insulator 13 is composed of an insulating resin material such as polybutylene terephthalate (PBT), for example.

[0039] The stator 10 configured as described above generates a magnetic force acting on the rotor 20 when a current flows through the coil 12. Specifically, the stator 10 generates a magnetic flux on the air gap surface with the rotor core 22 of the rotor 20 such that N poles and S poles alternately exist along the rotation direction (circumferential direction) of the rotation shaft 21. The direction of the main magnetic flux generated by the stator 10 is a direction (radial direction) orthogonal to the axis C of the rotation shaft 21. The stator 10 constitutes a magnetic circuit together with the rotor 20.

[0040] Next, the rotor 20 will be described. The rotor 20 (rotor) rotates due to the magnetic force generated in the stator 10. As shown in FIG. 4, the rotor 20 has a rotating shaft 21. The rotor 20 rotates about the axis C of the rotating shaft 21 as the center of rotation.

[0041] The rotor 20 is disposed facing the stator 10. In the present embodiment, the rotor 20 faces the stator 10 in a direction (radial direction) orthogonal to the direction in which the axis C of the rotating shaft 21 extends.

[0042] The rotor 20 is configured such that a plurality of N poles and S poles repeatedly exist along the rotation direction of the rotating shaft 21. The rotor 20 is an interior permanent magnet rotor (IPM (Interior Permanent Magnet) rotor). Therefore, the molded motor 1 is an IPM motor.

[0043] Specifically, the rotor 20 includes a rotating shaft 21, a rotor core 22, and permanent magnets 23 inserted into respective ones of a plurality of magnet insertion holes 22a formed in the rotor core 22.

[0044] The rotor core 22 is a rotor core that serves as the core of the rotor 20. The rotor core 22 is a substantially cylindrical laminate in which a plurality of electromagnetic steel sheets are laminated along the direction in which the axis C of the rotating shaft 21 extends. Note that the rotor core 22 is not limited to a laminate composed of a plurality of steel sheets, and may be a bulk body composed of a magnetic material.

[0045] The plurality of magnet insertion holes 22a formed in the rotor core 22 are equally spaced along the rotation direction of the rotating shaft 21. Each of the plurality of magnet insertion holes 22a penetrates the rotor core 22 in the direction in which the axis C of the rotating shaft 21 extends, but may not penetrate the rotor core 22. A permanent magnet 23 is embedded in each magnet insertion hole 22a. The permanent magnet 23 is a sintered magnet, and one permanent magnet 23 is inserted into each magnet insertion hole 22a. Note that the permanent magnet 23 may be a bonded magnet.

[0046] At the center of the rotor core 22, a rotating shaft 21 is fixed. The rotating shaft 21 is a shaft having an axis C. The rotating shaft 21 is a long bar-shaped member such as a metal bar. The axis C of the rotating shaft 21 is the center of rotation when the rotor 20 rotates. The longitudinal direction (extending direction) of the rotating shaft 21 is the direction in which the axis C extends (axial direction).

[0047] The rotating shaft 21 is fixed to the rotor core 22 in a state of passing through the rotor core 22 so as to extend on both sides of the rotor core 22 in the direction in which the axis C of the rotating shaft 21 extends. Specifically, the rotating shaft 21 is inserted into a through hole provided at the center of the rotor core 22 and fixed to the rotor core 22. The rotating shaft 21 is fixed to the rotor core 22 by, for example, press-fitting or shrink-fitting into the through hole of the rotor core 22. The rotating shaft 21 is rotatably supported by a first bearing 51 and a second bearing 52.

[0048] The rotor 20 configured in this way generates a magnetic force acting on the stator 10. The direction of the main magnetic flux generated by the rotor 20 is, like the stator 10, the direction (radial direction) orthogonal to the axis C of the rotating shaft 21. That is, the directions of the magnetic fluxes generated by the stator 10 and the rotor 20 are both in the radial direction.

[0049] The rotor 20 rotates by the magnetic flux generated by the rotor 20 itself and the magnetic flux generated by the stator 10. Specifically, when power is supplied from the circuit board 70 to the coil 12 of the stator 10, a field current flows through the coil 12 and a magnetic flux is generated in the stator core 11. The magnetic force generated by the interaction between the magnetic flux generated in the stator core 11 and the magnetic flux generated from the permanent magnet 23 of the rotor 20 becomes the torque that rotates the rotor 20, and the rotor 20 rotates.

[0050] Next, the mold resin 30 will be described. As shown in FIG. 4, the mold resin 30 covers the stator 10. The mold resin 30 covers the outer portion of the stator 10 over the entire circumference of the stator 10. Specifically, the mold resin 30 covers the outer portions of the stator core 11, the coil 12, and the insulator 13. Note that the mold resin 30 is in contact with the outer surfaces of the coil 12 and the insulator 13.

[0051] The mold resin 30 is composed of an insulating resin material having excellent thermal conductivity such as a polyester resin or an epoxy resin. The mold resin 30 is composed of a thermosetting resin. In the present embodiment, the mold resin 30 is composed of an unsaturated polyester which is a thermosetting resin. Specifically, the mold resin 30 is composed of a white BMC (Bulk Molding Compound) unsaturated polyester resin. Note that the color of the BMC forming the mold resin 30 is not particularly limited, and other colors, for example, black, may also be used.

[0052] Also, as shown in FIGS. 1 to 4, the mold resin 30 is a part of the outer shell of the mold motor 1 and constitutes a housing. Specifically, as shown in FIG. 4, the mold resin 30 covering the stator 10 constitutes a housing that houses the rotor 20.

[0053] The mold resin 30 has a main body portion 31 forming the body of the mold motor 1 and a protruding portion 32 provided on the main body portion 31. A plurality of protruding portions 32 are provided on the main body portion 31. Specifically, as shown in FIGS. 1 to 3, four protruding portions 32 are provided on the main body portion 31. Note that the main body portion 31 and the protruding portion 32 are integrally formed by molding to constitute one mold resin 30.

[0054] The main body portion 31 covers the outer portion of the stator 10 over the entire circumference of the stator 10. Specifically, the main body portion 31 covers the stator core 11, the coil 12, and the insulator 13. As shown in FIG. 4, the main body portion 31 is a cylindrical body having openings at one end and the other end in the direction in which the axis C of the rotating shaft 21 extends.

[0055] As shown in FIGS. 3 and 4, the protruding portion 32 protrudes outward in the direction orthogonal (radial direction) to the direction in which the axis C of the rotating shaft 21 extends. Specifically, each of the plurality of protruding portions 32 protrudes in a convex shape from the outer surface of the main body portion 31. As shown in FIG. 4, the plurality of protruding portions 32 extend radially in the direction orthogonal (radial direction) to the axis C of the rotating shaft 21 in a top view. The plurality of protruding portions 32 are provided at equal intervals along the rotation direction of the rotating shaft 21. Specifically, four protruding portions 32 are provided at 90-degree intervals along the rotation direction of the rotating shaft 21.

[0056] The protruding portion 32 is a leg portion of the mold motor 1 and functions as a mounting portion for mounting the mold motor 1 to an object to be installed. The mold motor 1 is mounted to the object to be installed via a mounting member 40 fixed to each protruding portion 32.

[0057] Next, the mounting member 40 will be described. The mounting member 40 is a component for installing the mold motor 1 to an object to be installed. The object to be installed where the mold motor 1 is installed is a rigid body made of a metal material, a resin material, or the like. For example, when the mold motor 1 is installed in a fan motor of an outdoor unit of an air conditioner, the mold motor 1 of the fan motor is installed in the main body of the outdoor unit which is the object to be installed.

[0058] As shown in FIGS. 1 to 4, the mounting member 40 is fixed to the mold resin 30. The mounting member 40 is fixed to the mold resin 30 by integral molding. In the present embodiment, as shown in FIG. 5, the mounting member 40 is fixed to the protruding portion 32 of the mold resin 30 in a state where a part of the mounting member 40 is embedded in the protruding portion 32.

[0059] The mounting member 40 includes a vibration isolation rubber 41 which is an elastic body, and a cylindrical member 42 disposed around the vibration isolation rubber 41. The vibration isolation rubber 41 is attached to an object to be installed where the mold motor 1 is installed. FIG. 6 is a perspective view of the mounting member 40 in the mold motor 1 according to the embodiment. FIG. 7A is a top view of the mounting member 40. FIG. 7B is a cross-sectional view taken along line VIIB-VIIB in FIG. 7A. As shown in FIGS. 6, 7A, and 7B, the mounting member 40 is a component in which the vibration isolation rubber 41 and the cylindrical member 42 are integrated. The vibration isolation rubber 41 and the cylindrical member 42 are integrally formed by resin molding before the mounting member 40 is fixed to the mold resin 30.

[0060] The vibration isolation rubber 41 which is an elastic body has a function of absorbing or attenuating the vibration of the mold motor 1 so that the vibration of the mold motor 1 is not transmitted to the object to be installed. That is, the vibration isolation rubber 41 suppresses the transmission of the vibration generated by the mold motor 1 to the object to be installed. Specifically, the vibration isolation rubber 41 which is an elastic body is composed of an elastomer having rubber elasticity. As an example, the vibration isolation rubber 41 is composed of a rubber material such as ethylene propylene rubber (EPM (Ethylene Propylene Rubber), EPDM (Ethylene Propylene Dene Rubber), EP (Ethylene Propylene)) or nitrile rubber (NBR (Nitrile Rubber)). Note that EPM is a copolymer of ethylene and propylene as ethylene propylene rubber, and EPDM is a terpolymer containing a small amount of a third component in addition to ethylene and propylene.

[0061] As shown in FIGS. 6, 7A, and 7B, the vibration isolator 41 is provided with insertion holes 41a through which screws, bolts, or the like (hereinafter referred to as "screws, etc."), which are fixing members for attaching the molded motor 1 to the object to be installed, are inserted. The shape of the vibration isolator 41 is a thick cylindrical member with a large thickness. The shape of the vibration isolator 41 is cylindrical. As an example, the radial thickness of the vibration isolator 41 is approximately the same as the diameter of the insertion hole 41a, but it is not limited to this. From the viewpoint of suppressing the vibration of the molded motor 1, it is preferable that the radial thickness of the vibration isolator 41 is larger than the diameter of the insertion hole 41a. The fixing members such as screws are selected according to the mounting portion of the object to be installed on which the molded motor 1 is mounted, for example, in the state of a frame. Specifically, if a female screw is formed on the frame, a screw can be used as the fixing member. Also, if a through hole is formed in the frame, a bolt and a nut can be used as the fixing member.

[0062] The cylindrical member 42 is disposed outside the vibration isolator 41 so as to surround the vibration isolator 41. The cylindrical member 42 has a shape corresponding to the outer shape of the vibration isolator 41. In this case, the shape of the cylindrical member 42 and the shape of the vibration isolator 41 are preferably similar shapes. Since the vibration isolator 41 is cylindrical, the cylindrical member 42 is also cylindrical. The cylindrical member 42 is disposed such that the inner surface of the cylindrical member 42 is in contact with the outer surface of the vibration isolator 41. Therefore, the inner diameter of the cylindrical member 42 is the same as the outer diameter of the vibration isolator 41.

[0063] Note that although the height of the cylindrical member 42 is lower than that of the vibration isolator rubber 41, it is not limited to this. For example, the height of the cylindrical member 42 and the height of the vibration isolator rubber 41 may be the same. Also, the shape of the vibration isolator rubber 41 and the shape of the cylindrical member 42 do not have to be circular, and may be a square tube shape or other polygonal shape. The shape of the vibration isolator rubber 41 and the shape of the cylindrical member 42 do not have to be the same, and may be different. The cylindrical member 42 is a ring member. Therefore, although the shape of the cylindrical member 42 in top view is a closed ring shape, it may also be a C shape. That is, a slit may be formed in the side wall of the cylindrical member 42. Also, there may be a step on the surface of the cylindrical member 42, or a hole may be formed in a part of the side wall of the cylindrical member 42.

[0064] The cylindrical member 42 is a rigid member harder than the vibration isolator rubber 41. That is, the hardness of the cylindrical member 42 is harder than the hardness of the vibration isolator rubber 41. The cylindrical member 42 is made of a metal material. As an example, the cylindrical member 42 is an iron cylindrical tube formed of an iron-based material. Note that the material of the cylindrical member 42 is not limited to a metal material as long as its hardness is harder than that of the vibration isolator rubber 41, and it may be made of a ceramic material, a hard resin material, or the like. The cylindrical member 42 may be made of a material that can sufficiently withstand the maximum injection pressure (for example, about 100 MP) of the liquid resin 30a (see FIG. 9B) injected when molding the mold resin 30.

[0065] The hardness of the cylindrical member 42 and the hardness of the vibration isolator rubber 41 can be evaluated based on indicators such as durometer hardness, Vickers hardness, or Shore hardness. The hardness of the cylindrical member 42 and the hardness of the vibration isolator rubber 41 may also be evaluated by the elastic modulus (Young's modulus) of the materials constituting the cylindrical member 42 and the vibration isolator rubber 41. For example, if the elastic modulus (Young's modulus) of the cylindrical member 42 is greater than the elastic modulus (Young's modulus) of the vibration isolator rubber 41, the hardness of the cylindrical member 42 is harder than the hardness of the vibration isolator rubber 41.

[0066] As an example, the material of the vibration isolator rubber 41 is EPDM having a durometer hardness of 35 rubber hardness. The material of the cylindrical member 42 is iron.

[0067] As shown in FIGS. 4 and 5, the vibration isolator 41 and the cylindrical member 42 are fixed to the mold resin 30 by integral molding. That is, the vibration isolator 41 and the cylindrical member 42 are structured so as not to come off from the mold resin 30. Therefore, it has become impossible to remove the vibration isolator 41 and the cylindrical member 42 from the mold resin 30.

[0068] The vibration isolator 41 and the cylindrical member 42 are disposed on the protruding portion 32 of the mold resin 30. That is, the vibration isolator 41 and the cylindrical member 42 are fixed to the protruding portion 32 of the mold resin 30 by integral molding. Specifically, as described above, the vibration isolator 41 and the cylindrical member 42 are fixed to the mold resin 30 as the mounting member 40.

[0069] The vibration isolator 41 is embedded in the protruding portion 32 so that the upper and lower end portions in the axial direction are exposed. That is, the upper end top surface, the upper end outer peripheral side surface, the lower end bottom surface, and the lower end outer peripheral side surface of the vibration isolator 41 are exposed. On the other hand, the cylindrical member 42 is embedded in the protruding portion 32 without the entire outer peripheral side surface being exposed. The upper end top surface of the cylindrical member 42 exists at a position recessed from the outer surface of the protruding portion 32, and the lower end bottom surface of the cylindrical member 42 is flush with the outer surface of the protruding portion 32.

[0070] Next, the first bearing 51, the second bearing 52, the first bracket 61, and the second bracket 62 will be described.

[0071] As shown in FIG. 4, the first bearing 51 and the second bearing 52 rotatably support the rotating shaft 21. Specifically, the first portion 21a of the rotating shaft 21 protruding from one side of the rotor core 22 is supported by the first bearing 51. On the other hand, the second portion 21b of the rotating shaft 21 protruding from the other side of the rotor core 22 is supported by the second bearing 52. As an example, the first bearing 51 and the second bearing 52 are bearings such as ball bearings.

[0072] In the present embodiment, the first portion 21a of the rotating shaft 21 is an output shaft and protrudes from the first bearing 51 and the first bracket 61. A load such as a rotating fan is attached to the first portion 21a of the rotating shaft 21. Note that the second portion 21b of the rotating shaft 21 is a counter-output shaft and does not protrude from the second bearing 52 and the second bracket 62.

[0073] The first bracket 61 holds the first bearing 51. The first bearing 51 is fixed in the recess of the first bracket 61. Also, the second bracket 62 holds the second bearing 52. The second bearing 52 is fixed to the second bracket 62.

[0074] The first bracket 61 is provided at one end of the mold resin 30 in the direction in which the axis C of the rotating shaft 21 extends. Specifically, the first bracket 61 is arranged so as to close the opening on one end side of the main body portion 31 of the mold resin 30.

[0075] The second bracket 62 is provided at the other end of the mold resin 30 in the direction in which the axis C of the rotating shaft 21 extends. Specifically, the second bracket 62 is arranged so as to close the opening on the other end side of the main body portion 31 of the mold resin 30.

[0076] Note that the overall outer diameter of the first bracket 61 is smaller than the overall outer diameter of the second bracket 62. That is, the second bracket 62 has a larger outer dimension than the first bracket 61.

[0077] The first bracket 61 and the second bracket 62 are made of a metal material such as iron. For example, the first bracket 61 and the second bracket 62 are made of a metal plate having a constant thickness. The first bracket 61 and the second bracket 62 are fixed to the mold resin 30. Specifically, the first bracket 61 is fixed to the mold resin 30 together with the stator 10 when the stator 10 is molded by resin. On the other hand, the second bracket 62 is fixed to the molded mold resin 30.

[0078] As described above, the molded motor 1 of the present embodiment includes a stator 10, a rotor 20 having a rotating shaft 21 that rotates by the magnetic force of the stator 10, a molded resin 30 that covers at least a part of the stator 10, an elastic body 41 that is attached to an object to be installed where the molded motor 1 is installed, and at least one or more hard members disposed around the elastic body 41 and harder than the elastic body 41. The elastic body 41 and the hard members are fixed to the molded resin 30 by integral molding.

[0079] Thereby, even if the molded motor 1 is installed on the installation object using the elastic body 41, it is possible to prevent the molded motor 1 from falling off the installation object.

[0080] Next, a method for manufacturing the molded motor 1 will be described with reference to FIGS. 8, 9A, and 9B. In particular, below, a method for fixing the attachment member 40 to the molded resin 30 will be mainly described. FIG. 8 is a flowchart of a method for manufacturing the molded motor 1 according to the embodiment. FIGS. 9A and 9B are diagrams for explaining a method for fixing the attachment member 40 to the molded resin 30 in the method for manufacturing the molded motor 1. FIG. 9A is an enlarged view of a protruding portion 32 of the molded resin 30 in the completed molded motor 1. FIG. 9B is a diagram showing a state when the molded resin 30 is molded by the mold 100 in the cross section along line IXB-IXB of FIG. 9A.

[0081] First, the attachment member 40 having the structure shown in FIGS. 6, 7A, and 7B is separately manufactured. Specifically, as shown in FIG. 8, the attachment member 40 is manufactured by integrally molding the vibration-proof rubber 41 and the cylindrical member 42 (step S11). The attachment member 40 can be manufactured, for example, by insert molding. In this case, a metal cylindrical member 42 is placed in a resin molding die, and a liquid resin of a resin material constituting the vibration-proof rubber 41 is injected into the die and cured, whereby an attachment member 40 in which the cylindrical member 42 is fixed to the vibration-proof rubber 41 by integral molding can be manufactured.

[0082] Next, as shown in FIG. 8, the mounting member 40 and the stator 10 are molded together with the molding resin 30 (step S12). Thereby, the molding resin 30 in which the mounting member 40 and the stator 10 are fixed by integral molding can be produced.

[0083] Specifically, first, the stator 10 having the stator core 11 around which the coil 12 is wound via the insulator 13 and the mounting member 40 are arranged in the mold 100 of the injection molding machine as shown in FIG. 9B. At this time, the first bracket 61 is also arranged in the mold 100.

[0084] The mold 100 is composed of a plurality of blocks. For example, when a horizontal injection molding machine is used, as shown in FIG. 9B, the mold 100 is configured to open and close in the vertical direction by a first block 101 that is a lower mold and a second block 102 that is an upper mold. In this case, the mounting member 40 is arranged in the mold 100 by inserting the protrusion 101a of the first block 101 into the insertion hole 41a formed in the vibration-proof rubber 41 of the mounting member 40. The diameter of the protrusion 101a is the same as the inner diameter of the insertion hole 41a of the vibration-proof rubber 41, and the protrusion 101a inserted into the insertion hole 41a of the vibration-proof rubber 41 is in close contact with the vibration-proof rubber 41.

[0085] Subsequently, the liquid resin 30a of the resin material constituting the molding resin 30 is injected into the mold 100 through the gate provided in the mold 100. At this time, since the cylindrical member 42 surrounds the vibration-proof rubber 41, when the liquid resin 30a is injected from the outside of the mounting member 40, the liquid resin 30a flows into the mold 100 without directly contacting the outer peripheral surface of the vibration-proof rubber 41. Specifically, the liquid resin 30a injected into the mold 100 is filled in the mold 100 while contacting the outer surface of the cylindrical member 42 surrounding the vibration-proof rubber 41. In this way, since the cylindrical member 42 is arranged outside the vibration-proof rubber 41, the injection pressure of the liquid resin 30a can be received by the cylindrical member 42, and it is possible to prevent the injection pressure of the liquid resin 30a from being applied to the vibration-proof rubber 41. Thereby, it is possible to suppress deformation of the vibration-proof rubber 41 due to the injection pressure of the liquid resin 30a.

[0086] When injecting the liquid resin 30a into the mold 100, as described above, the protrusion 101a of the first block 101 is inserted into the insertion hole 41a formed in the vibration-proof rubber 41. Thus, since the vibration-proof rubber 41 is supported by the protrusion 101a, it is possible to further suppress the deformation of the vibration-proof rubber 41 within the mold 100 during the molding of the molded resin 30.

[0087] After filling the liquid resin 30a into the mold 100, the liquid resin 30a is cured. As a result, the stator 10, the mounting member 40, and the first bracket 61 are fixed to the molded resin 30 by integral molding.

[0088] After that, the mold motor 1 is completed by assembling other components such as the rotor 20 to the stator 10 covered with the molded resin 30.

[0089] Next, the features of the mold motor 1 according to the present embodiment will be described, including the background leading to the technology of the present disclosure.

[0090] FIG. 10 is a perspective view showing the configuration of a conventional mold motor. Conventionally, when installing a fan motor having a mold motor on an object to be installed, in order to prevent the vibration generated by the fan motor from being transmitted to the object to be installed, the fan motor has been installed on the object to be installed via a vibration-proof rubber.

[0091] In this case, as shown in FIG. 10, in the conventional mold motor 1X, after covering the stator with the mold resin 30X to complete the stator mold, the vibration-proof rubber 41X is attached to the protruding portion 32X (leg portion) of the mold resin 30X. FIG. 11 is a flowchart of a manufacturing method of the conventional mold motor. Specifically, as shown in FIG. 11, the vibration-proof rubber 41X is produced by resin molding (step S21). The stator is molded with the mold resin 30X to produce a stator mold (step S22). The vibration-proof rubber 41X is attached to the stator mold (step S23). In this case, as shown in FIG. 10, the vibration-proof rubber 41X is attached to the mold resin 30X by inserting the vibration-proof rubber 41X laterally into the protruding portion 32X of the mold resin 30X. That is, the vibration-proof rubber 41X is retrofitted to the mold resin 30X.

[0092] Thus, when a fan motor having the mold motor 1X in which the vibration-proof rubber 41X is retrofitted to the mold resin 30X is installed on an object to be installed, there is a concern about the occurrence of an event in which the fan motor falls off from the object to be installed due to a typhoon or an earthquake or the like.

[0093] Therefore, it is conceivable to fix the vibration-proof rubber 41X to the mold resin 30X by integral molding. That is, when the stator is molded with the mold resin 30X, it is conceivable to mold the vibration-proof rubber 41X together with the stator with the mold resin 30X.

[0094] However, when the vibration-proof rubber 41X was actually integrally molded with the mold resin 30X, it was found that the vibration-proof rubber 41X was deformed. Specifically, it was found that the vibration-proof rubber 41X was deformed by the injection pressure when the liquid resin of the resin material constituting the mold resin 30X was injected into the mold.

[0095] As a result of intensive studies by the inventors of the present application on this problem, when integrally molding the vibration-proof rubber with the mold resin, at least one or more hard members harder than the vibration-proof rubber are arranged around the vibration-proof rubber, and the vibration-proof rubber and the hard members are fixed to the mold resin by integral molding.

[0096] The mold motor 1 according to the present disclosure is made based on this idea. Specifically, the mold motor 1 includes a vibration isolation rubber 41 attached to an object to be installed where the mold motor 1 is installed, and a hard member harder than the vibration isolation rubber 41. At least one or more hard members are arranged around the vibration isolation rubber 41. The vibration isolation rubber 41 and the hard member are fixed to the mold resin 30 by integral molding. The mold motor 1 includes a cylindrical member 42 as a hard member arranged around the vibration isolation rubber 41.

[0097] In this way, a cylindrical member 42 is arranged around the vibration isolation rubber 41 as a hard member harder than the vibration isolation rubber 41. Thereby, even if the vibration isolation rubber 41 is integrally molded with the mold resin 30, it is possible to suppress the vibration isolation rubber 41 from being deformed by the injection pressure of the liquid resin 30a for molding the mold resin 30.

[0098] In particular, in the present embodiment, the cylindrical member 42 is arranged outside the vibration isolation rubber 41 so as to surround the vibration isolation rubber 41.

[0099] With this configuration, as shown in FIG. 9B, when the liquid resin 30a is injected from the outside of the vibration isolation rubber 41, the cylindrical member 42 surrounding the outside of the vibration isolation rubber 41 can receive the injection pressure of the liquid resin 30a. It is possible to prevent the injection pressure of the liquid resin 30a from being applied to the vibration isolation rubber 41. Thereby, it is possible to effectively suppress the vibration isolation rubber 41 from being deformed by the injection pressure of the liquid resin 30a.

[0100] The mold resin 30 has a protruding portion 32 that protrudes outward in the radial direction, which is a direction orthogonal to the direction (axial direction) in which the axis C of the rotating shaft 21 extends. The vibration isolation rubber 41 and the cylindrical member 42 as the hard member are arranged on the protruding portion 32. That is, the vibration isolation rubber 41 and the cylindrical member 42 are fixed to the protruding portion 32 of the mold resin 30 by integral molding.

[0101] With this configuration, the molded motor 1 can be installed on the object to be installed by utilizing the protruding portion 32 of the molded resin 30. That is, the molded motor 1 can be attached to the object to be installed via the vibration-proof rubber 41 fixed to the protruding portion 32. Therefore, the molded motor 1 can be easily attached to the object to be installed.

[0102] Specifically, the vibration-proof rubber 41 is provided with an insertion hole 41a through which a screw or the like for attaching the molded motor 1 to the object to be installed is inserted. Thereby, by inserting a screw or the like into the insertion hole 41a formed in the vibration-proof rubber 41 and screwing it, the molded motor 1 can be easily attached to the object to be installed.

[0103] Also, in the present embodiment, the vibration-proof rubber 41 is made of ethylene propylene rubber or nitrile rubber.

[0104] Thereby, the vibration of the molded motor 1 can be effectively absorbed by the vibration-proof rubber 41. Therefore, the transmission of the vibration of the molded motor 1 to the object to be installed can be effectively suppressed. For example, the vibration displacement of the molded motor 1 is 20 μm to 30 μm, but the vibration of such a vibration displacement can be effectively absorbed by the vibration-proof rubber 41.

[0105] Moreover, the heat-resistant temperature of ethylene propylene rubber or nitrile rubber is 150°C or lower. Specifically, the heat-resistant temperature (maximum specification temperature) of ethylene propylene rubber is 150°C. The heat-resistant temperature (maximum specification temperature) of nitrile rubber is 130°C. Therefore, since the vibration-proof rubber 41 is made of ethylene propylene rubber or nitrile rubber, the molding temperature of the liquid resin 30a when molding the molded resin 30 can be allowed up to 150°C.

[0106] For example, the molding temperature when resin molding using an unsaturated polyester resin is 150°C. Therefore, since the molded resin 30 is made of an unsaturated polyester resin, the material of the vibration-proof rubber 41 can be ethylene propylene rubber or nitrile rubber.

[0107] As described above, according to the mold motor 1 according to the present embodiment, since the vibration isolation rubber 41 and the cylindrical member 42 are fixed to the mold resin 30 by integral molding, the vibration isolation rubber 41 is prevented from coming off from the mold resin 30. Accordingly, even if the mold motor 1 is installed on the installation object using the vibration isolation rubber 41 for noise reduction, it is possible to suppress the mold motor 1 from falling off from the installation object.

[0108] For example, when a fan motor including the mold motor 1 is installed on the main body of the outdoor unit of an air conditioner via the vibration isolation rubber 41, even when strong winds such as typhoons or earthquakes occur, it is possible to suppress the fan motor from falling off from the main body of the outdoor unit. That is, it is possible to realize a fan motor that can achieve both noise reduction by the vibration isolation rubber 41 and prevention of falling off from the installation object.

[0109] (Modification example) As described above, the mold motor 1 according to the present disclosure has been described based on the embodiment. However, the present disclosure is not limited to the above embodiment.

[0110] For example, in the attachment member 40 in the above embodiment, the inner diameter of the cylindrical member 42 and the outer diameter of the vibration isolation rubber 41 were substantially the same. However, the present invention is not limited to this. FIG. 12A is a top view of the attachment member 40A according to Modification Example 1. FIG. 12B is a cross-sectional view taken along line XIIB-XIIB of FIG. 12A. For example, as in the attachment member 40A shown in FIGS. 12A and 12B, in a portion where the cylindrical member 42A and the vibration isolation rubber 41 are in contact, the inner diameter of the cylindrical member 42A may be smaller than the outer diameter of the vibration isolation rubber 41. That is, a part of the cylindrical member 42A in the thickness direction may be embedded in the vibration isolation rubber 41.

[0111] As in the case of the mounting member 40A according to this modification example, since a part of the cylindrical member 42A is embedded in the vibration isolator rubber 41, it becomes difficult for the cylindrical member 42A to shift in the axial direction (vertical direction) of the cylindrical member 42A. Since a part of the cylindrical member 42A is embedded in the vibration isolator rubber 41, the contact area between the cylindrical member 42A and the vibration isolator rubber 41 can be increased as compared with the case where a part of the cylindrical member 42A is not embedded in the vibration isolator rubber 41. Thereby, when the mounting member 40A fixes the molded motor to the installation object by inserting a screw or the like through the insertion hole 41a formed in the mounting member 40A, it is possible to suppress the idling of the cylindrical member 42A.

[0112] Note that not only a part in the thickness direction of the cylindrical member 42A is embedded in the vibration isolator rubber 41, but also the entire thickness direction of the cylindrical member 42A may be embedded in the vibration isolator rubber 41. That is, the outer surface of the cylindrical member 42A may be exposed, and the outer diameter of the cylindrical member 42A and the outer diameter of the vibration isolator rubber 41 may be the same. Further, the cylindrical member 42A is embedded in the vibration isolator rubber 41 over the entire circumference in the circumferential direction. However, it is not limited to this. A part in the circumferential direction may be embedded in the vibration isolator rubber 41. For example, a plurality of protrusions may be provided on the inner surface of the cylindrical member 42A along the circumferential direction, and only the plurality of protrusions may be embedded in the vibration isolator rubber 41.

[0113] Further, in the above embodiment, the mounting member 40 had one cylindrical member. However, it is not limited to this. For example, the mounting member 40 may have a plurality of cylindrical members. Specifically, as in the case of the mounting member 40B shown in FIGS. 13A and 13B, as a hard member harder than the vibration isolator rubber 41, the first cylindrical member 42a and the second cylindrical member 42b may be provided. Note that FIG. 13A is a top view of the mounting member 40B according to Modification Example 2. FIG. 13B is a cross-sectional view taken along line XIIIB-XIIIB of FIG. 13A.

[0114] In the mounting member 40B, the first cylindrical member 42a is disposed outside the vibration isolator 41 so as to surround the vibration isolator 41. The second cylindrical member 42b is disposed inside the vibration isolator 41. That is, the first cylindrical member 42a is an outer tube. The second cylindrical member 42b is an inner tube.

[0115] Specifically, the first cylindrical member 42a is the same as the cylindrical member 42 of the mounting member 40 in the above embodiment. The first cylindrical member 42a is fixed to the vibration isolator 41 in the same manner as the mounting member 40 in the above embodiment. Therefore, the first cylindrical member 42a is an iron cylindrical tube, and the inner surface of the first cylindrical member 42a and the outer surface of the vibration isolator 41 are arranged to be in contact with each other.

[0116] The second cylindrical member 42b is made of a metal material, a ceramic material, a hard resin material, or the like. As an example, the second cylindrical member 42b is an iron cylindrical tube, like the first cylindrical member 42a. Note that the second cylindrical member 42b and the first cylindrical member 42a have the same shape (both are cylindrical). However, they may have different shapes. The second cylindrical member 42b and the first cylindrical member 42a are made of the same material (both are made of iron). However, they may have different materials.

[0117] Also, the entire thickness direction of the second cylindrical member 42b is embedded in the vibration isolator 41. That is, the inner diameter of the second cylindrical member 42b and the inner diameter of the vibration isolator 41 are the same, and the inner surface of the second cylindrical member 42b is exposed and the inner surface of the second cylindrical member 42b and the inner surface of the vibration isolator 41 are flush. Therefore, in the mounting member 40B, the through hole of the second cylindrical member 42b serves as a mounting hole (screw insertion hole) when mounting the molded motor to the object to be installed.

[0118] Thus, the mounting member 40B in this modification has a configuration in which the vibration isolator 41 is sandwiched between the first cylindrical member 42a and the second cylindrical member 42b. Specifically, the mounting member 40B has a configuration in which the second cylindrical member 42b is added to the mounting member 40 in the above embodiment.

[0119] With this configuration, the deformation of the vibration-proof rubber 41 due to the injection pressure of the liquid resin 30a during the mold forming of the mold resin 30 can be suppressed by the first cylindrical member 42a. Since the through-hole of the second cylindrical member 42b serves as the mounting hole, the dimensional accuracy of the mounting hole of the mounting member 40B can be increased. Therefore, the looseness when the mounting member 40B and the object to be installed are screwed together can be eliminated, so that the mold motor can be stably fixed to the object to be installed. As a result, the mold motor can be further suppressed from falling off the object to be installed.

[0120] Note that not all of the second cylindrical member 42b in the thickness direction needs to be embedded in the vibration-proof rubber 41. For example, a part of the second cylindrical member 42b in the thickness direction may be embedded in the vibration-proof rubber 41. Alternatively, not all of the second cylindrical member 42b in the thickness direction needs to be embedded. Also, a part or all of the first cylindrical member 42a in the thickness direction may be embedded in the vibration-proof rubber 41. Thus, at least one of the first cylindrical member 42a and the second cylindrical member 42b may have a part embedded in the vibration-proof rubber 41.

[0121] Also, in the mounting member 40 in the above embodiment, the cylindrical member 42 has a cylindrical shape without a step on the surface, but it is not limited to this. FIG. 14A is a top view of the mounting member 40C according to Modification 3. FIG. 14B is a cross-sectional view taken along line XIVB-XIVB of FIG. 14A. For example, like the mounting member 40C shown in FIGS. 14A and 14B, the cylindrical member 42C may have a stepped cylindrical shape. In this case, the stepped portion may be configured so that a part of the cylindrical member 42C protrudes toward the vibration-proof rubber 41, and this stepped portion may be embedded in the vibration-proof rubber 41.

[0122] As in the case of the mounting member 40C according to this modification example, since the stepped portion of the cylindrical member 42C is embedded in the vibration isolation rubber 41, it becomes difficult for the cylindrical member 42C to shift in the axial direction (vertical direction) of the cylindrical member 42C. Also, the stepped portion has a structure that catches on the vibration isolation rubber 41. Therefore, when inserting a screw or the like through the insertion hole 41a formed in the mounting member 40C and screwing the molded motor to the object to be installed, it is also possible to suppress the idling of the cylindrical member 42C.

[0123] Also, FIG. 15A is a top view of the mounting member 40D according to Modification Example 4. FIG. 15B is a cross-sectional view taken along line XVB-XVB of FIG. 15A. As in the case of the mounting member 40D shown in FIGS. 15A and 15B, the cylindrical member 42D with steps may be fixed to the vibration isolation rubber 41 without embedding the stepped portion of the stepped cylindrical member 42D in the vibration isolation rubber 41. With this configuration, at the time of mold molding of the mold resin 30, the cylindrical member 42D can be reliably held by the mold 100, and the positioning accuracy of the cylindrical member 42D can be improved.

[0124] In the mounting member 40 in the above embodiment, the rigid member disposed around the vibration isolation rubber 41 was the cylindrical member 42. However, it is not limited to this. That is, the shape of the rigid member disposed around the vibration isolation rubber 41 does not have to be cylindrical. That is, the rigid member disposed around the vibration isolation rubber 41 is made of a material harder than the vibration isolation rubber 41, and as long as it can suppress the injection pressure of the liquid resin 30a from being applied to the vibration isolation rubber 41 when fixing the vibration isolation rubber 41 to the mold resin 30 by mold molding.

[0125] In the above embodiment, the cylindrical member 42 is cylindrical or rectangular cylindrical, and the outer shape of the cylindrical member 42 in a top view is a circle or a polygon. However, it is not limited to this. For example, the cylindrical member 42 may have a cylindrical shape in which the outer diameter shape in a top view is a star shape or the like.

[0126] In the above embodiment, the rotor 20 was an IPM rotor. However, it is not limited to this. For example, when using a permanent magnet type rotor as the rotor 20, the rotor 20 may be a surface magnet type rotor (SPM rotor) in which a plurality of permanent magnets are provided on the outer surface of the rotor core.

[0127] In the above embodiment, the case where the molded motor 1 is used as a fan motor was exemplified, but it is not limited to this. The molded motor 1 can also be applied to devices other than the fan motor. That is, the load attached to the rotating shaft 21 of the molded motor 1 is not limited to the rotating fan.

[0128] In addition, forms obtained by applying various modifications that can be conceived by those skilled in the art to the above embodiments and modification examples, or forms realized by arbitrarily combining the components and functions in the above embodiments and modification examples without departing from the spirit of the present disclosure are also included in the present disclosure.

Industrial Applicability

[0129] The molded motor of the present disclosure can be used in devices in various fields, including fan motors used in air conditioning equipment such as air conditioners.

Explanation of Signs

[0130] 1 Molded motor 10 Stator 11 Stator core 12 Coil 13 Insulator 20 Rotor 21 Rotating shaft 21a First part 21b Second part 22 Rotor core 22a Magnet insertion hole 23 Permanent magnet 30 Molded resin 30a Liquid resin 31 Body part 32 Protrusion Mounting members 40, 40A, 40B, 40C, 40D Vibration isolator rubber (elastic body) 41 Insertion hole 41a Cylindrical members 42, 42A, 42C, 42D First cylindrical member 42a Second cylindrical member 42b First bearing 51 Second bearing 52 First bracket 61 Second bracket 62 Circuit board 70 Mold 100 First block 101 Projection 101a Second block 102

Claims

1. A molded motor, comprising: a stator; a rotor having a rotating shaft that rotates by the magnetic force of the stator; a molded resin that covers at least a part of the stator; an elastic body that is attached to an object on which the molded motor is installed; and at least one hard member that is disposed around the elastic body and is harder than the elastic body, wherein the elastic body and the hard member are fixed to the molded resin by integral molding.

2. The molded resin has a protruding portion that protrudes outward in a radial direction that is orthogonal to an axial direction of the rotating shaft, and the elastic body and the hard member are disposed on the protruding portion. The molded motor according to Claim 1.

3. The molded motor includes a cylindrical member as the hard member, and the cylindrical member is disposed outside the elastic body so as to surround the elastic body. The molded motor according to Claim 1 or 2.

4. A part of the cylindrical member is embedded in the elastic body. The molded motor according to Claim 3.

5. The molded motor includes a first cylindrical member and a second cylindrical member as the hard members, the first cylindrical member is disposed outside the elastic body so as to surround the elastic body, and the second cylindrical member is disposed inside the elastic body. The molded motor according to Claim 1 or 2.

6. At least one of the first cylindrical member and the second cylindrical member has a part embedded in the elastic body. The molded motor according to Claim 5.

7. The hard member is made of a metal material. The molded motor according to any one of Claims 1 to 6.

8. The molded resin is made of an unsaturated polyester resin. The molded motor according to any one of Claims 1 to 7.

9. The elastic body is provided with an insertion hole through which a fixing member for attaching the molded motor to the installation object is inserted. The molded motor according to any one of Claims 1 to 8.

10. The elastic body is an anti-vibration rubber that suppresses transmission of vibration generated by the molded motor to the installation object. The molded motor according to any one of Claims 1 to 9.

11. The anti-vibration rubber is made of ethylene propylene rubber or nitrile rubber. The molded motor according to Claim 10.

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