JP4042211B2 - Motor with built-in capacitor and blower - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a motor with a built-in capacitor in which circuit components such as a starting capacitor are arranged at the end on the counter-rotating shaft side, and a blower device that blows air by rotating a blower blade with the motor with a built-in capacitor.
[0002]
[Prior art]
Examples of the motor with a built-in capacitor in which circuit components such as a starting capacitor are arranged at the end on the counter-rotating shaft side are as shown in, for example, Japanese Utility Model Publication No. 6-77458 and Japanese Patent Publication No. 6-95816. There is. The former is called an outer rotor type in which the rotor rotates outside the stator, and has a configuration as shown in FIG. The latter is called an inner rotor type in which the rotor rotates inside the stator, and has a configuration as shown in FIG. In the outer rotor type motor with a built-in capacitor, as shown in FIG. 8, circuit components such as the starting capacitor 30 are mounted on a circuit board disposed on the end side in the stacking direction of the stator cores, Is molded with an insulating resin 31 leaving a soldering surface on the soldering side of the circuit board, and the mounting flange 32 is integrally formed on the outer periphery by the insulating resin 31. A cover 33 is attached to the end portion on the circuit board side, and the entire end portion is covered with the cover 33 together with the circuit components. Even in the inner rotor type motor with a built-in capacitor, as shown in FIG. 9, circuit components such as the starting capacitor 30 are arranged at the end of the motor case 34 on the counter-rotating shaft side, and a cover 33 covering the entire motor case 34 is provided. It is covered.
[0003]
When such a motor with a built-in capacitor is used to rotate the blower blades of the blower, the motor with a built-in capacitor is attached in the manner shown in FIGS. That is, a motor fixing member 37 as shown in FIG. 10 surrounding the outer edge of the mounting hole 36 formed in the main body frame 35 of the blower to which the condenser built-in motor is attached is arranged on the main body frame 35, and the capacitor The built-in motor cover 33 side is inserted into the mounting hole 36 and the motor fixing member 37, and several screws 38 are screwed onto the motor fixing member 37 from the outer peripheral mounting flange 32 side of the built-in capacitor motor. It is attached to the frame 35. Since the main body frame 35 is often made of plastic and the strength of the rim of the mounting hole 36 is not so strong, the motor fixing member 37 is made of a steel plate to compensate for this.
[0004]
[Problems to be solved by the invention]
In the above conventional motor with built-in capacitor, the motor fixing member 37 is often required to fix it, and when used in a blower or the like, the number of parts increases, making it cumbersome and expensive to assemble. was there. Further, when it is necessary to form a bent portion in the motor fixing member 37, the processing of the motor fixing member 37 becomes troublesome, and the cost is further increased. Furthermore, in the case of an outer rotor type motor with a built-in capacitor, since the motor lead electrically connected to the circuit components such as the starting capacitor 30 is drawn out from the outlet formed in the cover 33, the mounting hole 36 is provided. In order to prevent air from leaking from the outlet to the outside, it is necessary to protect the motor lead and to attach a sealing material or the like to the outlet, which causes problems such as an increase in the number of parts and assembly.
[0005]
The present invention has been made to solve the above-described conventional problems, and the problem is to obtain a motor with a built-in capacitor that does not require a separate fixing member and is easy to assemble. Yes, it is to develop a low-cost air blower with a small number of parts and good assemblability by applying the motor with a built-in capacitor.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention according to claim 1 is directed to a motor with a built-in capacitor in which circuit components such as a starting capacitor are disposed at the end on the counter-rotating shaft side and have a mounting flange on the outer periphery. In addition, a shallow container-like cover with a flange facing the mounting flange is provided, and the motor mounting partner is sandwiched between the cover flange and the mounting flange. A means is adopted that allows the cover to be fixed to the mounting counterpart by screwing the cover to the flange of the cover.
[0007]
In order to achieve the above object, an invention according to claim 2 is directed to an outer rotor type motor with a built-in capacitor, in which circuit components such as a starting capacitor are disposed at the end on the counter-rotating shaft side and have a mounting flange on the outer periphery. A shallow container-like cover having a flange facing the mounting flange is provided with the circuit component and the end on the counter-rotating shaft side, and a motor mounting partner is provided between the flange of the cover and the mounting flange. A means is adopted that can be clamped and fixed to the mounting counterpart by screwing the cover flange from the mounting flange side.
[0008]
In order to achieve the above object, the invention of claim 3 employs means for forming the cover of the means according to either claim 1 or claim 2 with a drawn product of a steel plate.
[0009]
In order to achieve the above object, the invention according to claim 4 is characterized in that a circuit built-in motor having a circuit component such as a starting capacitor is disposed at the end on the counter-rotating shaft side and has a mounting flange on the outer peripheral portion. For the air blower that is mounted with the rotating shaft side facing and the fan blades are attached to the rotating shaft, the end of the motor with built-in capacitor on the counter-rotating shaft side is covered with circuit parts and faces the mounting flange of the motor with built-in capacitor A shallow container-like cover with a flange is provided, the body frame is sandwiched between the flange of this cover and the mounting flange, and the motor with built-in capacitor is fixed to the body frame by screwing the cover flange from the mounting flange side. Adopt a means to do.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
The first embodiment shown in FIGS. 1 to 4 relates to an outer rotor type motor with a built-in capacitor (hereinafter simply referred to as a motor). A stator 1 of the motor includes a stator core as a functional component formed by stacking a plurality of ring-shaped iron cores, a winding wound through a groove of the stator core, and the winding Circuit boards disposed in the stacking direction of the stator core for electrically connecting the motor leads 2 to each other, and the outer periphery of the circuit boards is soldered on the soldering side of the circuit board The resin mold circuit board 3 is formed in this portion. A mounting flange 5 having several screw insertion holes 4 is formed on the outer periphery of the resin mold circuit board 3 by integral molding.
[0017]
On the center line of the stator 1, the rotary shaft 6 is rotatably supported by a bearing, the rotary yoke 7 is fitted to the rotary shaft 6, and the rotor core 8 integrated with the rotary yoke 7 is a stator. A motor is constructed by assembling the iron core facing each other while holding a gap. The resin-molded circuit board 3 is configured at the end opposite to the rotating shaft side, and the motor lead 2 extending to the outside from the outlet 9 includes a starting capacitor 10 and a thermal fuse mounted on the circuit board. It is electrically connected to the winding through the circuit component.
[0018]
The resin-molded circuit board 3 on the side opposite to the rotating shaft from the mounting flange 5 is covered with a circuit component such as a starting capacitor 10 by a shallow container 11 as shown in FIGS. The flange 12 on the outer periphery of the cover 11 is formed to have an outer diameter substantially matching the mounting flange 5, and a screw hole 13 is formed at a position corresponding to the screw insertion hole 4 of the mounting flange 5. The cover 11 is formed by drawing a steel plate that is easy to maintain the attachment strength, and is usually fitted in the outer peripheral portion of the resin molded circuit board 3 in a loosely fitted state, and is flanged from the screw insertion hole 4 of the attachment flange 5. The twelve screw holes 13 are mounted by screwing with several mounting screws 14. In this state, a predetermined insulation distance is secured between the surface of the starting capacitor 10 and the inner surface of the cover 11. The outlet 9 of the motor lead 2 of the resin molded circuit board 3 is covered by the body portion 15 of the cover 11 together with the motor lead 2 of the portion by mounting the cover 11.
[0019]
As shown in FIG. 2, the cover 11 can have sufficient strength if a bent portion 16 is formed on the outer periphery of the flange 12. However, as shown in FIG. A simple configuration as shown in FIG. Further, the material reduction can be further promoted by providing several linear cut portions 17 on the outer periphery of the flange 12 as shown in FIG. A feature of this motor is that the cover 11 can be used as a motor fixing member when the motor is attached to the mounting partner 18 and is made of a steel plate to obtain strength for fixing the motor. As long as sufficient strength can be ensured, for example, it may be made of plastic. Further, the start-up capacitor 10 protrudes among the circuit components, and the thermal fuse or the like does not protrude. Therefore, the portion corresponding to the start-up capacitor 10 is locally bulged 19 as shown in FIG. By adopting such a configuration, it is possible to increase the material saving effect.
[0020]
The motor is mounted on the mounting partner 18 after the cover 11 is removed by removing the mounting screw 14. First, the removed cover 11 is arranged so that the flange 12 is along the edge of one side of the mounting hole 21 opened in the mounting part 20 of the mounting partner 18, and the main body side of the motor is moved from the resin mold circuit board 3 side. Insert into the mounting hole 21 from the side opposite to the cover 11 until the mounting flange 5 contacts the edge of the mounting hole 21. In this state, the resin molded circuit board 3 is housed in the cover 11. Then, the screw insertion holes 4 of the mounting flange 5 and the screw holes 13 of the flange 12 are aligned, the mounting screws 14 are screwed into the screw holes 13 from the screw insertion holes 4 side, and the mounting portion 20 of the mounting partner 18 is mounted. It is completed by sandwiching between the flange 5 and the flange 12. Thus, in this motor, the cover 11 performs the outer shell function of the motor and the fixing function of the motor fixing member. Therefore, no additional fixing member is required, and the number of parts can be reduced and the assembly is easy. It will be something. If the motor and the cover 11 are directly attached to the mounting partner 18 to form a motor assembly, the above-described assembly and reassembly can be omitted, and the drawing depth of the cover 11 is also equal to the thickness of the mounting partner 18. As a result, the assembly process can be shortened and the amount of component materials used can be reduced.
[0021]
Embodiment 2. FIG.
The second embodiment shown in FIG. 5 relates to the motor as in the first embodiment. The second embodiment is the same as the first embodiment except that the motor is an inner rotor type. Therefore, the same reference numerals as those of the first embodiment are used for the same parts as those of the first embodiment, and the description thereof is omitted.
[0022]
In the motor shown in the first embodiment, since the bearing that supports the rotating shaft 6 is housed in the stator 1, the inner rotor type holding the bearing by the motor case 22 and the motor bracket 23 as shown in FIG. 5. The size in the axial direction can be made smaller than that of the motor, and the configuration can be made smaller. Therefore, the cover 11 can also be formed into a shallow container shape that can be easily drawn. However, as shown in FIG. 5, the inner rotor type motor can be implemented only by the cover 11 having a deep container shape. A configuration similar to that of the first embodiment can be applied. However, when the cover 11 is made of a steel plate, it becomes a deep drawing that is somewhat troublesome for processing, and a large amount of material is required. Other configurations, functions, and advantages are the same as those of the first embodiment.
[0023]
Embodiment 3 FIG.
In this third embodiment shown in FIGS. 6 and 7, the motor shown in the first embodiment is applied to the blower, and the motor is the same as that shown in the first embodiment. Therefore, the same reference numerals as those in the first embodiment are used for the portions shown in the first embodiment, and the description thereof is omitted.
[0024]
The air blower shown in FIG. 6 is installed on the back of a ceiling or the like and sucks indoor air from the ceiling surface side, exhausts it outside the room through a duct 24, and performs indoor ventilation. A blower blade 27 that is rotated by a motor 26 is incorporated in a box-shaped main body frame 25 having an open bottom surface. The motor 26 is attached to the attachment portion 20 on the top surface of the main body frame 25 with the rotary shaft 6 facing downward. A blower blade 27 is attached to the rotary shaft 6 and is rotated by a motor 26 to form an air flow from a lower suction port 28 toward a duct connection port 29 attached to a side portion of the main body frame 25. The mounting portion 20 is configured to bulge outward in a convex shape, and a mounting hole 21 is formed at the end of the protruding portion. The motor 26 is attached to the attachment portion 20 after the attachment screw 14 of the motor 26 is removed and the cover 11 is removed. First, the removed cover 11 is arranged from the outside of the mounting portion 20 so that the flange 12 extends along the edge of the mounting hole 21, and the motor 26 is mounted on the main body side from the resin mold circuit board 3 side in the main body frame 25. The mounting flange 5 is inserted into the hole 21 until it hits the edge of the mounting hole 21. In this state, the resin molded circuit board 3 of the motor 26 is accommodated in the cover 11. Then, the screw insertion holes 4 of the mounting flange 5 and the screw holes 13 of the flange 12 are aligned, the mounting screws 14 are screwed into the screw holes 13 from the screw insertion holes 4 side, and the mounting portion 20 is fixed to the mounting flange 5 and the flange. 12 is completed.
[0025]
Thus, in this blower, since the cover 11 performs the outer shell function of the motor 26 and the fixing function of the motor fixing member, no additional fixing member is required, and the number of parts can be reduced and assembled. It will be easy. In addition, since the outlet 9 of the motor lead 2 is covered from the outside by the cover 11, there is no air leakage and there is no need to attach a sealing material or the like to this part, so that the number of parts can be greatly reduced and the cost can be reduced. Can be achieved. When the strength of the mounting portion 20 is low, the cover 11 including the flange 12 having the bent portion 16 as shown in FIG. The mounting portion 20 can be reinforced by fitting outside. Since a predetermined space is secured between the cover 11 and the surface of the starting capacitor 10, the insulation performance is good, and the advantages of the motor shown in the first embodiment can be received.
[0026]
Even if the inner rotor type motor shown in the second embodiment is used, it is possible to configure the blower as described above. Further, in a blower such as a ventilation fan for a duct that is mounted in the duct 24 and forms an air flow in the duct 24 as shown in FIG. 7, the outer diameter of the flange 12 of the cover 11 is made smaller than the outer diameter of the mounting flange 5. By configuring, the flange 12 does not protrude outward, and the air blower is easy to handle without being caught or disturbed by the duct 24 when attached to the duct 24.
[0027]
【The invention's effect】
As is apparent from the above description of the embodiment, according to the first aspect of the invention, an easily assembled motor that does not require a separate fixing member can be obtained.
[0028]
According to the invention of claim 2, a compact motor that is easy to assemble and does not require a separate fixing member can be obtained.
[0029]
According to the invention of claim 3, it is easy to maintain the attachment strength together with the effect according to claim 1 or claim 2.
[0030]
According to the invention of claim 4, a low-cost air blower with a small number of parts and good assemblability can be obtained.
[Brief description of the drawings]
FIG. 1 is a side view showing a motor according to a first embodiment.
FIG. 2 is a perspective view showing a cover of the motor according to the first embodiment.
3 is a perspective view showing another cover of the motor according to Embodiment 1. FIG.
FIG. 4 is a cross-sectional view showing still another cover of the motor according to the first embodiment.
FIG. 5 is a side view showing a motor according to a second embodiment.
6 is a cross-sectional view showing a blower according to Embodiment 3. FIG.
FIG. 7 is a cross-sectional view showing another blowing device of the third embodiment.
FIG. 8 is a side view showing a conventional motor.
FIG. 9 is a side view showing another conventional motor.
10 is a perspective view showing a motor fixing member of FIG. 9. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stator, 2 Motor lead, 3 Resin mold circuit board, 4 Screw insertion hole, 5 Mounting flange, 6 Rotating shaft, 9 Drawer outlet, 10 Capacitor for starting, 11 Cover, 12 Flange, 13 Screw hole, 14 Mounting screw, 16 bending parts, 17 cut parts, 18 mounting counterparts, 19 bulges, 20 mounting parts, 21 mounting holes, 25 body frame, 26 motor, 27 blower blades.

Claims (4)

A circuit component such as a starting capacitor is disposed at the end on the counter-rotating shaft side and has a mounting flange on the outer periphery, and the end on the counter-rotating shaft side is covered with the circuit component. And a shallow container-like cover having a flange facing the mounting flange is provided, and a motor mounting partner is sandwiched between the flange of the cover and the mounting flange, and the flange of the cover from the mounting flange side A motor with a built-in capacitor that can be fixed to the mounting partner by tightening the screw. A circuit component such as a starting capacitor is disposed at the end on the counter-rotating shaft side, and is an outer rotor type motor with a built-in capacitor having a mounting flange on the outer peripheral portion, together with the circuit component, the end on the counter-rotating shaft side A shallow container-like cover having a flange facing the mounting flange is provided, and a motor mounting partner is sandwiched between the flange and the mounting flange of the cover, and from the mounting flange side. A motor with a built-in capacitor that can be fixed to the mounting counterpart by screwing the cover flange.   The motor with a built-in capacitor according to claim 1 or 2, wherein the cover is formed of a drawn product of a steel plate. A circuit component such as a starting capacitor is disposed at the end on the counter-rotating shaft side, and a motor with a built-in capacitor having a mounting flange on the outer peripheral portion is mounted in the main body frame with the rotating shaft side facing, and a blower blade is attached to the rotating shaft. A shallow container-like cover having a flange facing the mounting flange of the motor with a built-in capacitor, with the end on the counter-rotating shaft side of the motor with a built-in capacitor covered with the circuit component. A fan with a structure in which the body frame is sandwiched between the flange of the cover and the mounting flange, and a motor with a built-in capacitor is fixed to the body frame by screwing the cover flange to the flange of the cover from the mounting flange side. apparatus.

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