JP2011056138A - Rotary electric machine for driving blowing fan of clothes drier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary electric machine arranged in the drier for attaining easy assembling by reducing an artificial assembling error without using neither an exclusive aid nor tool when joining a housing where an end bracket having a function of attachment to a drier and a rotary electric machine fixing element are incorporated. <P>SOLUTION: The rotary electric machine for driving a blowing fan, which blows drying air to the inner part of a clothes drier, includes: the end bracket for bearing one end of the rotator of the rotary electric machine and also attaching the rotary electric machine to the clothes drier; the housing for bearing the other end of the fixing element of the rotary electric machine and also incorporating the fixing element; and a rotary electric machine ring having positioning parts on the front and rear sides. The end bracket and the housing are respectively positioned on the front and rear sides of the rotary electric machine ring to hold the rotary electric machine ring, so as to fix the end bracket and housing by connection. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a rotary electric machine for driving a blower fan that blows air for drying into a clothes dryer such as a drum-type washing and drying machine.

Due to recent changes in lifestyles, home appliances are strongly desired to have lower noise and vibration.
There is no exception in the drum-type washing and drying machine, which is an example, and the number of users who are forced to use it at night is increasing rapidly. Is also an important factor in purchasing motivation.

Such a drum-type washing and drying machine has a rotating electric machine that drives the drum and a casing that supports the rotating drum, and a blower fan that blows air into the rotating drum during the drying operation includes a drum. It is driven by a rotating electrical machine that is separate from the rotating electrical machine to be driven.
One of the solutions for reducing noise and vibration in drum-type washing and drying machines is to reduce noise and vibration of rotating electrical machines. On the other hand, it improves the product performance of drum-type washing and drying machines and improves the drying function. Therefore, the rotating electrical machine that drives the blower fan is required to rotate at a higher speed, which contradicts the suppression of noise and vibration.

  In a drum-type washing and drying machine, a rotating electric machine for driving a blower fan that blows drying air into a drum during a drying operation is described in Patent Document 1 below. Such a rotating electrical machine also has an assembly structure similar to that of the motor as described in Patent Documents 2 and 3, and has a housing incorporating an end bracket and a rotating electrical machine stator having a function of being attached to a drying device. Assembly workers (dedicated assembly jigs equipped with positioning pins) are used for assembly based on the operator's own assembly know-how.

JP 2009-50338 A JP 63-283442 A JP 2007-37334 A

As a method for suppressing the noise and vibration of the rotating electrical machine described above, there is an approach in mechanical design, which improves the mechanical accuracy of individual parts constituting the rotating electrical machine, and unloads the output transmission part during output transmission in the rotating electrical machine. Balance reduction is a typical one.
Thus, noise vibration can be suppressed by improving the accuracy of parts and reducing the unbalance of the output transmission part.

On the other hand, another major factor causing noise and vibration is an artificial assembly error. As mentioned above, the assembly of rotating electrical machines is performed using assembly jigs such as assembly dedicated to rotating electrical machines. However, since this is done by humans, changes in accuracy occur due to changes in workers. I could not deny that.
That is, typical assembly work for rotating electrical machines has been generally performed as follows.
(1) Pass the positioning hole provided in the flange part of the end bracket through the employed positioning pin.
(2) One end of the rotor is incorporated into the bearing of the end bracket, and the other end of the rotor is incorporated into the bearing of the housing.
(3) The positioning hole provided in the flange portion of the housing is passed through the corresponding hiring positioning pin, and the end bracket and the housing are coupled by tightening a screw.

The hiring locating pins are made of metal from the viewpoint of durability, and in order to improve the efficiency of the above assembly work, the positioning holes of the end bracket and the housing are made larger in diameter than the hiring locating pins so that smooth assembling work is possible. I can do it.
As a result, the pressing direction of the end bracket and the housing relative to the positioning pin of the end bracket differs depending on the worker, so that the relative position of the housing and the end bracket slightly deviates. In particular, the radial displacement is a major factor in generating noise. End up.
In addition, since the hiring is designed exclusively for the specifications of the rotating electrical machine, it must be used for a long period of time, but the positioning pin gradually deforms depending on the impact during installation and the habit of the worker. In addition, since one of the side surfaces is worn, the displacement of the relative position between the housing and the end bracket is further enlarged.

  Further, in the conventional assembly operation of a rotating electrical machine, the assembly standard for centering the rotating electrical machine is based on machined end brackets and housings and processed inlays, or the stator in the housing of the rotating electrical machine. Since the outer periphery of the stator is taken out of the housing in the state of incorporating the end bracket and the end bracket is assembled on the basis of the outer periphery of the stator that has been taken out, high machining accuracy has been required.

  Accordingly, an object of the present invention is to simplify the assembly work in a rotating electric machine for driving a blower fan used in a drying device such as a drum type washing dryer, in which a higher speed rotation is required particularly from the viewpoint of improving a drying function. At the same time, it is an object of the present invention to provide a rotating electrical machine in which a decrease in performance of the rotating electrical machine due to human factors and machining accuracy is reduced.

  In order to achieve the above object, according to the present invention, in a rotary electric machine for driving a blower fan that blows drying air into a clothes dryer, one end of a rotor of the rotary electric machine is supported and the clothes dryer is provided. An end bracket for mounting the rotating electrical machine; a housing for bearing the other end of the rotor of the rotating electrical machine; the housing incorporating the stator; and a rotating electrical machine ring provided with positioning portions on the front and back sides. The bracket and the housing are respectively positioned on the front and back sides of the rotating electrical machine ring, and the rotating electrical machine ring is sandwiched and both are connected and fixed.

  According to the present invention, when assembling the end bracket and the housing of the rotating electrical machine, the rotating electrical machine ring sandwiched between the end bracket and the housing can be used accurately without using a dedicated jig such as a dedicated worker. Positioning can be performed, human assembly errors can be reduced, and the assembly position can be easily determined without using machining, improving the assembly accuracy caused by humans and affecting vibration and noise. It is possible to provide a rotary electric machine for a drying apparatus with a small amount of drying.

It is an external view which shows the drum type washing-drying machine carrying the rotary electric machine of this invention. It is a perspective view which cut | disconnects a part of housing | casing of the drum type washing machine carrying the rotary electric machine of this invention, and shows an internal structure. It is a rear view which removes the back cover of the drum type washing machine which carries the rotary electric machine of this invention, and shows an internal structure. It is a side view which shows the internal structure of the drum type washing machine carrying the rotary electric machine of this invention. It is a top view which cut | disconnects the upper part of the housing | casing of the drum type washing machine carrying the rotary electric machine of this invention, and shows an internal structure. It is sectional drawing of the drying apparatus which concerns on this invention. It is a side view which cut | disconnects the upper part of the rotary electric machine of 1st Example of this invention, and shows an internal structure. It is a side view which shows the internal structure of the rotary electric machine using the rotary electric machine ring A of 1st Example of this invention. It is a perspective view of the rotary electric machine ring A which is 1st Example of this invention. It is a side view which shows the internal structure of the rotary electric machine using the rotary electric machine ring B of 2nd Example of this invention. It is a perspective view of the rotary electric machine ring B which is 2nd Example of this invention. It is an expansion | deployment perspective view which shows the internal structure of the rotary electric machine using the rotary electric machine ring A which is 1st Example of this invention. It is an expanded view perspective view which shows the internal structure of the rotary electric machine using the rotary electric machine ring B which is 2nd Example of this invention. It is a perspective view which shows the assembly procedure of the rotary electric machine using the rotary electric machine ring B which is 2nd Example of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an external view of a drum type washing / drying machine according to an embodiment of the present invention. FIG. 2 is a perspective view showing a part of the casing cut off to show the internal structure, FIG. 3 is a rear view with the back cover removed to show the internal structure, and FIG. 4 shows the internal structure. FIG. 5 is a side view, and FIG. 5 is a plan view showing a part of the housing cut away to show the internal structure.
In addition, although it demonstrates by the drying apparatus with which a drum type washing-dryer is equipped here, it cannot be overemphasized that it can apply also to what is called a vertical-type washing dryer which is not a drum type, and the clothes dryer which does not have a washing function.

  Reference numeral 1 denotes a housing constituting the outer shell. The housing 1 is mounted on a base 1h, and includes left and right side plates 1a and 1b, a front cover 1c, a back cover 1d, a top cover 1e, and a lower front cover 1f. The left and right side plates 1a and 1b are connected by a U-shaped upper reinforcing material (not shown), a front reinforcing material 37, and a rear reinforcing material (not shown), and a box-shaped housing including the base 1h. The body 1 is formed and has sufficient strength as a housing.

9 is a door which closes the insertion port for putting in and taking out the clothes provided in the approximate center of the front cover 1c, and is supported by the hinge provided in the front reinforcement material so that opening and closing is possible. When the door opening button 9d is pressed, the lock mechanism (not shown) is released to open the door, and when the door is pressed against the front cover 1c, the door is locked and closed. The front reinforcing member has a circular opening for putting clothes in and out concentrically with an opening of the outer tub described later.
Reference numeral 6 denotes an operation panel provided at the upper center of the housing 1 and includes a power switch 39, an operation switch A 20, an operation switch B 21, and a display 22. The operation panel 6 is electrically connected to a control device 38 provided at the lower part of the housing 1.

  3 is a cylindrical washing and dewatering tub (rotary drum) supported rotatably, having a large number of through holes for water flow and ventilation on its outer peripheral wall and bottom wall, and clothing on the front end face An opening 3a for taking in and out is provided. A fluid balancer 3c integrated with the washing and dewatering tub 3 is provided outside the opening 3a. A plurality of lifters 3b extending in the axial direction are provided inside the outer peripheral wall. When the washing and dewatering tub 3 is rotated during washing and drying, the clothes are lifted along the outer peripheral wall by the lifter 3b and centrifugal force, and dropped by gravity. Repeat the movements. The rotation center axis of the washing and dewatering tub 3 is inclined so that the horizontal or opening 3a side becomes higher.

  Reference numeral 2 denotes a cylindrical outer tub that coaxially encloses the washing and dewatering tub 3, opens on the front surface, and attaches the first rotating electric machine 4 to the outer center of the rear end surface. A rotating shaft of the rotating electrical machine 4 passes through the outer tub 2 and is coupled to the washing and dewatering tub 3. An outer tub cover 2d is provided at the opening on the front surface, and water can be stored in the outer tub. In the center of the front side of the outer tub cover 2d, there is an opening 2c for taking in and out clothing. The opening provided in the main opening 2c and the front reinforcing member 37 is connected by a rubber bellows 10, and the outer tub 2 is sealed with water by closing the door 9. A drain port 2b is provided at the bottom bottom of the outer tub 2 and a drain hose 26 is connected thereto. A drain valve (not shown) is provided in the middle of the drain hose 26. Water is stored in the outer tank 2 by closing the drain valve and supplying water, and the drain valve is opened to drain the water in the outer tank 2 outside the machine. To discharge.

The outer tub 2 is supported in an anti-vibration manner by a suspension 23 (consisting of a coil spring and a damper) whose lower side is fixed to the base 1h. Moreover, the upper side of the outer tank 2 is supported by an auxiliary spring (not shown) attached to the upper reinforcing member to prevent the outer tank 2 from falling in the front-rear direction.
Reference numeral 19 denotes a detergent container provided on the upper left side in the housing 1, and a drawer-type detergent tray 7 is mounted from the front opening. When putting detergents, the detergent tray 7 is pulled out as shown by a two-dot chain line in FIG. The detergent container 19 is fixed to the upper reinforcing material of the housing 1.
On the back side of the detergent container 19, components related to water supply such as a water supply electromagnetic valve 16, a bath water supply pump 17, and a water level sensor (not shown) are provided. The top cover 1e is provided with a water supply hose connection port 16a from a water tap and a water absorption hose connection port 17a for remaining hot water in the bath. The detergent container 19 is connected to the outer tub 2 and supplies washing water to the outer tub 2 by opening the water supply electromagnetic valve 16 or operating the bath water supply pump 17.

  Reference numeral 29 denotes a drying duct installed vertically inside the back surface of the housing 1, and a lower portion of the duct is connected to an intake port 2 a provided below the back surface of the outer tub 2 by a rubber bellows tube B 29 a. A water-cooled dehumidifying mechanism (not shown) is built in the drying duct 29, and cooling water is supplied from the water supply electromagnetic valve 16 to the water-cooled dehumidifying mechanism. The cooling water flows down along the wall surface of the drying duct 29, enters the outer tub 2 through the intake port 2a, and is discharged from the drain port 2b.

  The upper part of the drying duct 29 is connected to a filter duct 27 installed in the front-rear direction on the upper right side in the housing 1. The filter duct 27 has an opening on the front surface, and a drawer-type drying filter 8 is inserted into the opening. The air that has entered the filter duct 27 from the drying duct 29 flows into the mesh filter 9 of the drying filter 8 to remove lint. Cleaning of the dry filter 8 is performed by pulling out the dry filter 8 and taking out the mesh filter 8a. In addition, an opening is provided in the lower surface of the insertion portion of the drying filter 9 of the filter duct 27, and this opening is connected to the intake duct 33, and the other end of the intake duct 33 is connected to the intake port of the drying device 28. is doing.

The drying device 28 includes a rotating electric machine 5 for driving, a fan impeller 40, a drying device cover 28e, and a drying device case 28b. A heater 31 is built in the drying device case 28b and heats the air sent from the fan impeller 40. The discharge port of the drying device 28 is connected to the hot air duct 30. The hot air duct 30 is connected to a hot air outlet 32 provided in the outer tank cover 2d through a rubber bellows tube A30a and a bellows tube joint 30b. In the present embodiment, since the drying device 28 is provided on the upper right side in the housing 1, the hot air blowing port 32 is provided at a position on the upper right side of the outer tank cover 2 d, and the distance to the hot air blowing port 32 is set. I try to keep it as short as possible.
Temperature sensors (not shown) are provided at the drain port 2b and the intake and discharge ports of the drying device 28.

  The feature of the drying device mounted on the drum type washing / drying machine of the present embodiment is that the drying device 28 that generates high-speed wind directly applies high-speed wind to the clothing and stretches wrinkles generated in the clothing by the wind force. In the impeller driving rotary electric machine 5 to be incorporated, by using the rotary electric machine ring A10 or the rotary electric machine ring B11, an end bracket 12 that supports one end of the rotor 13 of the rotary electric machine 5 and is attached to the drying device, and the rotary electric machine fixing By rotating and coupling the rotating electrical machine ring between the end bracket and the housing by assembling and joining the housing 15 incorporating the stator 14 of the rotating electrical machine that supports the other end of the rotor 14, the rotating center of the rotor 13 is rotated. This is to enable positioning of the center of the stator 14 of the electric machine with high accuracy by a simple operation.

  Now, the flow of wind during the drying operation is as follows. When the drying device 28 is operated and the heater 31 is energized, high-speed warm air blows into the washing / dehydrating tub 3 from the nozzle 32d (arrow 41), hits the wet clothing, warms the clothing, and moisture evaporates from the clothing. The air that has become hot and humid flows from the through hole provided in the washing and dewatering tub 3 to the outer tub 2 and is sucked into the drying duct 29 from the air inlet 2a and flows from the bottom to the top in the drying duct 29 (arrow 42). Cooling water from the water cooling and dehumidifying mechanism flows down on the wall surface of the drying duct 29, and the hot and humid air is cooled and dehumidified by contacting with the cooling water, and becomes dry low temperature air and enters the filter duct 27 (arrow 43). . The lint is removed through the mesh filter 8a provided in the filter duct 27, enters the intake duct 33, and is sucked into the drying device 28 (arrow 44). Then, it is heated again by the heater 31 and circulates so as to blow into the washing and dewatering tub 3.

The drying device 28 will be described.
FIG. 6 is a sectional view of the drying device 28. The drying device 28 is composed of a drying device case 28 b containing the rotating electrical machine 5 and the impeller 40 and a drying device cover 28 e. The drying device case 28b is provided with a bell mouth 34 having a circular opening at the center and having a section having a curvature and an annular portion. The ring portion 40a of the impeller 40 and the circle of the bell mouth 34 are provided. It is comprised so that an annular part may overlap.

  The fan case 28d and the rotating electrical machine 5 are supported at the central portion thereof via a vibration isolating rubber 51, and the space between the end bracket 12 of the rotating electrical machine 5 and the drying device cover 28e is also interposed via the four rotating electrical machine vibration isolating rubbers 52. It is supported. The anti-vibration rubber 51 has an airtight function so as to prevent air from flowing out from the drying device cover 28e.

  Here, details of the rotating electrical machine 5 will be described. FIG. 7 is a top sectional view of the rotating electrical machine. The housing 15 has a stator 14 with armature windings 14b in a plurality of slots formed in the stator core 14a, and a plurality of permanent magnet insertion holes 13b formed in the rotor core 13a. The rotor 13 in which the permanent magnet 13 c is housed is configured to be rotatably supported on the inner periphery of the stator 14 via a predetermined gap 18.

The assembly of the rotating electrical machine when the rotating electrical machine ring A10 of the first embodiment is used will be described with reference to FIGS. 8, 9, and 12. FIG.
The rotating electrical machine ring A10 is sandwiched between the flanges of the end bracket 12 and the housing 15. In this embodiment, the rotary electric machine ring A10 has a circular opening having the same diameter as that of the end bracket 12 and the housing 15, and is radially arranged every 90 °. Bosses 10a and 10b having the same diameter are provided in a straight line on both the front and back surfaces, and the four bosses 10a and 10b are arranged at equal intervals on the same circumference every 90 °. It has become.
The rotating electrical machine ring A10 is desirably manufactured by resin molding. By adopting resin molding, it is possible to avoid the directionality during assembly by increasing the degree of freedom of the position and shape of the positioning boss and the shape of the screw fixing part, and to reduce the product cost it can.
In particular, the resin to be used is preferably a glass fiber reinforced plastic having heat resistance and insulation. As will be described later, the assembly is improved, and the natural vibration of the rotating electrical machine casing including the end bracket 12 and the housing 15 is improved. From the viewpoint of changing the number, the material of the synthetic resin, the glass fiber content, the thickness, and the like may be selected so as to have appropriate elasticity.

Now, the rotating electrical machine 5 is assembled as follows.
(1) The positioning hole 12a of the end bracket 12 and the positioning boss 10a of the rotating electrical machine ring A10 are aligned at four locations.
(2) The rotor 13 is incorporated so that the other end of the rotor 13 is supported by the housing 15 while the end bracket 12 is supported by the end bracket 12.
(3) The positioning hole 15a of the housing 15 and the rotating electrical machine ring A positioning boss 10b are aligned at four locations.
(4) A screw is passed through a screw hole formed in the housing 15 and screwed into a female screw portion on the end bracket 12 side provided at a position corresponding to the screw hole, and the screw is fixed with a predetermined tightening torque.

As described above, the rotary electric machine ring A10 is formed of a synthetic resin such as glass fiber reinforced plastic and has a certain degree of elasticity. Therefore, the diameter of the positioning bosses 10a and 10b and the positioning holes 12a and 15a Even if the diameter is set to approximately the same diameter, it can be smoothly inserted with a slight force.
In addition, when the glass fiber reinforced plastic is used, since it is reinforced by glass fiber reinforcement, the positional deviation between the end bracket 12 and the housing 15 can be minimized.
Further, since the boss 10a of the rotating electrical machine ring A10 is fitted into the positioning hole 12a of the end bracket 12, the rotating electrical machine ring A10 itself is not easily dropped, and the efficiency of the assembly work can be improved.
In this way, without using the conventional employment, the operator can accurately achieve the positioning of the end bracket 12 and the housing 15 bearing the both ends of the rotor 13 with extremely simple work.

Further, when the assembly is completed, the rotating electrical machine ring A10 molded with a resin such as glass fiber reinforced plastic is sandwiched between the end bracket 12 and the flange portion of the housing 15 with a predetermined tightening torque. As the rotor 13 rotates, vibrations generated in the end bracket 12 and the housing 15 are buffered by the rotating electrical machine ring A10, and the natural frequency of the motor housing formed by the combination of both is changed.
Therefore, when using a synthetic resin material, thickness, and glass fiber reinforced plastic for molding the rotating electrical machine ring A10, the above-described positioning accuracy can be improved by appropriately selecting the glass fiber content and the like. In addition, the natural frequency of the rotating electrical machine 5 transmitted through the end bracket 12 can be changed to avoid resonance with the drying device cover 28e and the like, and further lower vibration and noise can be realized. it can.

  In this embodiment, the bosses 10a and 10b are also arranged on the same circumference at equal intervals of 90 °, so the rotating electrical machine ring A10 has no direction on the front and back surfaces, Since there is no directivity in the direction of circumferential rotation, there is no possibility of misassembly where the front and back surfaces are mistakenly assembled, or incorrect assembly in the circumferential direction. Can be

However, the bosses 10a and 10b are not limited to those arranged at equal intervals on the same circumference as in the above embodiment. Depending on the specifications of the rotating electrical machine 5, the end bracket 12 and the rotating electrical machine ring A10 are not limited. The positioning hole 12a of the end bracket 12 and the positioning hole 15a of the housing 15 are respectively provided on the front and back of the rotating electrical machine ring A10 so that the relative position of the housing 15 and the relative position of the rotating electrical machine ring A10 are predetermined. It may be provided at unequal intervals so as to correspond to.
Even in this case, it is confirmed by visual inspection before assembly that the positioning hole 12a of the end bracket 12 and the positioning boss 10a of the rotating electrical machine ring A10 are correctly aligned at four positions, and then the positioning hole 15a of the housing 15 is confirmed. By combining the positioning boss 10b of the rotating electrical machine ring A10, there is no erroneous assembly in which the front and back surfaces are mistakenly assembled.

In addition, the positioning bosses 10a and 10b of the rotating electrical machine ring A10 can be confirmed to be reliably incorporated into the end bracket and the housing by making the shape of the end bracket plate thickness and the housing plate thickness longer.
In this case, the outer peripheral shape of the positioning bosses 10a and 10b of the rotating electrical machine ring A10 is arbitrary, but a shape considering the efficiency of the assembly work is desirable, and depending on the specifications of the rotating electrical machine, the positioning holes 12a of the end bracket 12 Even if only the specific positioning hole portions 12a and 15a and the specific bosses 10a and 10b are changed in outer peripheral shape and diameter so that the positioning hole portions 15a of the housing 15 match predetermined positioning bosses 10a and 10b. Good.

Next, the assembly of the rotating electrical machine when the rotating electrical machine ring B11 of the second embodiment is used will be described with reference to FIGS.
In the rotating electrical machine ring B11 used in this embodiment, the rotating electrical machine ring B11 is arranged on the same circumference and at the same interval with respect to the rotational direction toward the position inside the stator 14 and close to the bobbin outer circumference of the fixed winding 14b. A rib 11c for preventing the stator 14 from falling off is formed toward the housing 15 side.

  Usually, the stator 14 of the rotating electrical machine 5 is mainly bonded and fixed to the housing 15 with an adhesive (not shown). However, the reliability of the adhesive due to the heat change over time and the stator due to external stress are used. In this embodiment, the rotating electrical machine ring B11 sandwiched between the end bracket 12 and the flange portion of the housing 15 is provided with a dropping prevention rib 11c so that the stator 14 is dropped in the direction of the rotation axis. I try to suppress it.

When assembling the rotating electrical machine 5 using the rotating electrical machine ring B11, the positioning hole 12a of the end bracket 12 is the same as in the first embodiment except that the dropping rib 11b is arranged toward the housing 15 side. And the positioning boss 11a of the rotating electrical machine ring B11 are aligned at four positions, and then the positioning hole 15a of the housing 15 and the positioning boss 11b of the rotating electrical machine ring B are aligned at 4 positions and fixed with screws.
Even in this case, if the boss portions 11a and 11b and the positioning holes 12a and 15a are arranged at equal intervals on the same circumference, the rotating electrical machine ring B11 has no directivity with respect to the circumferential rotation direction. Thus, there is no misassembly that causes misassembly in the circumferential direction.

  On the other hand, depending on the specifications of the rotating electrical machine, not limited to this, the arrangement, outer peripheral shape, and diameter may be changed so that only a specific positioning hole and a specific boss are positioned as in the first embodiment. is there.

FIG. 14 shows a drop-off prevention example when performing assembly work using the rotating electrical machine ring B11.
Conventionally, as a representative of the parts existing between the parts, a packing having a function of preventing spillage of gas or liquid from a joint between the parts is typical, but the general shape of the packing is There are few shapes that have a function of preventing dropout during assembly.
By using the present invention, the positioning hole 12a of the end bracket 12 and the positioning boss 10a of the rotating electrical machine ring B11 are aligned in advance, so that the bobbin outer periphery of the fixed winding 14b is firmly held by the dropping rib 11b. Even when some external stress is applied, it is possible to prevent the parts from falling off.

  In each embodiment, the positioning by the rotating electrical machine ring is performed by the boss portion and the end bracket provided in the rotating electrical machine ring and the positioning hole provided in the housing. However, the positioning of the end bracket and the housing in the radial direction and the circumferential direction is performed. As long as it is possible to accurately perform the above, various positioning means can be employed.

In the present invention, the rotating electrical machine ring can be mass-produced at a low cost corresponding to the specifications of each rotating electrical machine by using a synthetic resin such as a glass fiber reinforced plastic, without significantly increasing the unit price of the rotating electrical machine itself, By simplifying the assembly work and improving positioning accuracy, it is possible to reduce the vibration and noise of the dryer.
Furthermore, when molding a rotating electrical machine ring with resin, the natural frequency of the rotating electrical machine casing can be changed by appropriately selecting the resin material, glass fiber content, thickness, etc., and resonance with the clothes dryer By avoiding this, it is possible to further reduce vibration and noise.

DESCRIPTION OF SYMBOLS 1 Case 2 Outer tub 3 Washing and dehydrating tub 4 Drum drive rotary electric machine 5 Drying device impeller drive rotary electric machine 10 Rotating electric machine ring A
11 Rotating electric machine ring B
12 End bracket 13 Rotor 14 Stator 15 Housing 28 Drying device 38 Control device 40 Impeller

Claims (5)

In a rotating electrical machine for driving a blower fan that blows drying air into a clothes dryer,
An end bracket for bearing one end of the rotor of the rotating electrical machine and attaching the rotating electrical machine to the clothes dryer;
Bearing the other end of the rotor of the rotating electrical machine, and a housing incorporating the stator;
Comprising a rotating electrical ring with positioning portions on the front and back,
The rotating electrical machine characterized in that the end bracket and the housing are positioned on each of the front and back sides of the rotating electrical machine ring, and the rotating electrical machine ring is sandwiched and both are connected and fixed. The rotating electrical machine according to claim 1, wherein
The rotary electric machine is characterized in that the positioning portions of the rotary electric machine ring are arranged at equal intervals on the same circumference on the front and back of the rotary electric machine ring. The rotating electrical machine according to claim 1 or 2,
The rotating electrical machine ring is formed of a synthetic resin such as glass fiber reinforced plastic. In the rotating electrical machine according to claim 3,
By selecting the material of the synthetic resin, the content and thickness of the glass fiber, the natural frequency when the end bracket and the housing are connected and fixed is set to a frequency that does not resonate with the housing of the dryer. A rotating electric machine characterized by   5. The rotating electrical machine according to claim 1, wherein the rotating electrical machine ring includes a drop-off preventing rib that holds a part of the outer periphery of the stator in proximity to the stator, and prevents the stator incorporated in the housing from falling off. A rotating electrical machine characterized by having a function to perform.

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