JP2010074963A - Drive motor of washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drive motor which improves the workability while controlling variation in operating temperature by fixing a thermal protector to a winding by using a heat shrinkage tube instead of a tight band, a binding thread, and a silicone rubber. <P>SOLUTION: Workability is improved by fixing a thermal protector to a winding by using a heat shrinkage tube thereby enhancing adhesion properties. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a washing machine driving motor that directly drives a rotating drum in an outer tub of a washing machine, and is a washing machine that has good workability on a winding of concentrated winding and has a temperature detection device that stably detects heat. The present invention relates to a drive motor.

  Japanese Patent Application Laid-Open No. 9-163686 (Patent Document 1) discloses a structure in which a fixing portion of a temperature protection device is provided by iron core molding. Japanese Patent Application Laid-Open No. 2006-187044 (Patent Document 2) discloses a configuration in which a temperature protection device is arranged through a holder that contacts both concentrated windings.

JP-A-9-163686 JP 2006-187044 A

  There are two types of stator winding methods: a distributed winding method in which winding is performed across several stator teeth, and a concentrated winding method in which winding is performed directly on the stator teeth.

  The distributed winding method is a method mainly used for induction motors. After coil forming with a winding die, it is loaded into a stator core, and after loading, a temperature protection device is arranged for further forming the end coil portion. Since the end coil portion can be made flat, it has good adhesion to the temperature protection device, and is fixed to the winding only with a civite or tie band.

  On the other hand, the concentrated winding method mainly used for brushless motors winds directly around each stator tooth while applying tension to the coil, so the molding process after winding is not possible, and the coil surface is uneven. If the temperature protection device is attached only with a cuvette or tight band, the adhesion and installation between the temperature protection device and the coil will be poor, and if the temperature protection device moves after tightening, it will cause a variation in operating temperature. Like the distributed winding method, in order to fix the adhesion with the winding well, apply silicone rubber to the winding, put a temperature protection device on it, and tighten the tooth winding part with a tight band or cyvalite It was fixed to.

  However, this method has a problem that workability is poor because it is necessary to fix tight bands and cyvalites through narrow teeth, and it takes a long time to solidify and dry the silicon rubber, resulting in a long tact time.

  In view of the above-described problems, the present invention uses a heat-shrinkable tube in a concentrated-winding motor that uses a heat-shrinkable tube, and does not use a tight band, civicite, or silicon rubber when attaching the temperature protection device to the winding. In order to provide a drive motor with improved workability, a specific means is to place a temperature protection device on the stator winding, and then cover it with a cylindrical heat-shrinkable tube. Shrink and fix. As a result, the adhesion is improved, and the workability and work time are improved.

  According to the present invention, in a concentrated winding motor, the temperature protection device does not use a tight band, a cigarette, or silicon rubber, and the time for drying the silicon rubber can be omitted. Since the number of the protective device fixing members can be reduced, the temperature protective device can be attached with low cost and stable adhesion, and the variation in operating temperature due to the attachment is suppressed.

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

  FIG. 1 relates to an embodiment of the present invention, and shows a longitudinal sectional view of a drum type washing and drying machine.

  The outer frame housing includes an outer frame 1 and a base portion 2 that supports the outer frame 1 so as to be placed thereon.

  In addition, there is a case in which an outer frame housing is configured only by the outer frame 1 without the base portion 2.

  The outer frame 1 has a lid 3 that can be opened and closed provided in the center of the front.

  An outer tub 4 made of resin is disposed inside the outer frame 1, and a rotatable rotating drum 5 is disposed in the outer tub 4. The rotary drum 5 is directly connected to the drive motor 7 via the main shaft 6. The drive motor 7 is fixed to a metal flange 8, and the metal flange 8 is fixed to the outer tub 4. At the time of assembly, the rotary drum 5 is assembled after the drive unit assembly in which the main shaft 6 and the drive motor 7 are assembled to the metal flange 8 is assembled to the outer tub 4. In the case of this embodiment, the rotary drum driving motor 7 is a magnet-embedded inner rotor, and the stator uses a DC brushless motor having concentrated windings. A plurality of dewatering holes 10 for dewatering moisture contained in the laundry 9 at high speed during dehydration are provided inside the rotating drum 5. The rotating drum 5 is provided with a fluid balancer 11 for reducing unbalance vibration due to the laundry 9 during dehydration.

  In order to seal the washing water between the lid 3 and the outer tub 4, a bellows 12 made of a rubber elastic body is provided.

  The outer tub 4 is supported by two suspensions 13 at the bottom to reduce unbalanced vibration caused by the laundry 9. The suspension 13 supports the outer tub 4 and the total weight attached thereto, and has a strong structure. In addition, a damping mechanism or the like is provided to prevent abnormal vibration caused by resonance of the outer tub 4 that occurs during the dehydration operation.

  Further, the upper part of the outer tub 4 is supported by two tension springs 14 and 15 arranged at the front and rear. These tension springs 14 and 15 are provided to support vibrations that prevent the outer tub 4 from collapsing in the front-rear direction and to reduce vibrations in the front-rear, up-down, and left-right directions during dehydration.

  A drain hose 16 for draining washing water is attached to the base portion 2. In addition, mounting legs 17 are provided at the four corners of the base portion 2. The mounting legs 17 are made of rubber and dampen vibration during operation of the drum type washing and drying machine.

  Although the outer frame housing has the outer frame 1 and the base portion 2, it is possible to provide the mounting legs 17 on the outer frame 1 without providing the base portion 2. In this case, the outer frame 1 becomes an outer frame casing. When washing and rinsing are performed, water necessary for rinsing and rinsing is supplied via a water supply hose 18 connected to a water faucet, a water injection hose 20 connected to a water supply electromagnetic valve 19, and a detergent tray 21. The supplied water is stored as washing water at the bottom of the outer tub 4 and as rinsing water at the time of rinsing. The detergent tray 21 is loaded with a detergent necessary for washing, and a rinse finish is poured to improve the finish when rinsing.

  At the time of washing, water supplied from the water injection hose 20 is poured from the upper part of the outer tub 4 through the flexible hose 22 while dissolving the detergent in the detergent tray 21.

  The rotating drum 5 inside the outer tub 4 with the rotational axis centering on the side is opened with the lid 3 placed therein, and the laundry 9 is placed inside. A plurality of lifters 23 are provided inside the rotating drum 5 so that the laundry 9 can be lifted up during washing.

  Water that has become unnecessary after washing and rinsing and water that has been dehydrated from the laundry 9 during dehydration are drained from the drain hose 16 by opening the drain valve 24.

  During drying, the air blown by the blower fan 25 passes through the rotating drum 5 containing the laundry 9 and the outer periphery, and therefore lint is included. Therefore, it is necessary to pass the drying filter 26 without fail.

  Therefore, the air is blown to the heater 27 via the drying filter 26, and the heated warm air is blown into the rotary drum 5 from the jet outlet 28 provided in the upper part of the outer tub.

  The hot air passes through the laundry 9 and is dehumidified from the rear part of the rotating drum 5 through the ventilation path 30 of the dehumidifying device 29 provided at the bottom of the outer tub 4 and is repeatedly circulated by the blower fan 25 to dry the laundry 9. Let

  FIG. 2 relates to an embodiment of the present invention, and shows a partial longitudinal sectional view in which the drive unit set 31 is attached to the outer tub 4. The drive unit set 31 is attached to the back side of the outer tub 4 with a mounting screw 35 via a metal flange 8. The rotating drum side boss portion 32 of the metal flange 8 constituting the drive unit set 31 is press-fitted with a water seal 33 inside, and the outside is covered with rubber. The outer tank boss part 34 is press-fitted into this part, and the outer tank 4 and the drive unit set 31 are sealed so that the washing water does not leak outside. On the opposite side of the rotating drum side boss portion 32, a driving motor side boss portion 37 is provided, and bearings 38 and 39 for rotating and supporting the main shaft 6 are accommodated. A rotor 36 is inserted into the main shaft 6 and fixed by a nut 40. On the outer periphery of the rotor 36, a stator 41 is fixed to the metal flange 8 with a mounting screw 42. A motor cover 43 is attached to the stator 41 on the upper surface of the stator 41. In order to detect the magnetic pole position of the rotor 36 on the lower surface of the stator 41, a thermal protector (not shown) is provided in this embodiment as a temperature protection device for detecting the heat generation of the Hall IC holder 45 and the winding. . The Hall IC holder 45 detects the magnetic flux on the end face of the rotor 36 and detects the polarity and position. The thermal protector shuts off the power supply when the drive motor 7 is overloaded.

  A flange 44 for attaching the rotary drum 5 is fitted and fixed to the main shaft 6. Since the gap between the inner diameter of the stator 41 and the outer diameter of the rotor 36 is about 0.6 to 1 mm in this embodiment, the stator 41 and the rotor 36 are easily electrically connected by condensed water or the like. The electrical insulation with 6 is performed by the rotor 36.

  FIG. 3 is a longitudinal sectional view of the stator 41 according to the embodiment of the present invention. A stator flange 48 is fitted to the outer periphery of the split stator core 47. The end face of the split stator core 47 is positioned in the axial direction by an end face support 49. The length of the end surface support portion 49 is in contact with the end surface of the split stator core 47 in a state that is equal to or slightly shorter than the width of the yoke 50. When the end surface support portion 49 is longer than the yoke 50, the winding portion of the tooth portion 51 is reduced, so that it is equal or slightly shorter. Since the split stator core 47 is formed by laminating thin magnetic steel sheets, if the outer periphery is strongly pressed, the end face side is deformed. Therefore, the length of the end face support 49 is increased, and the end face of the split stator core 47 is increased. The rigidity is increased by holding down. By making the fitting portion between the end face support portion 49 of the stator flange 48 and the end face of the split stator core 47 up to the yoke 50, deformation of the end face portion can be restrained by a load applied to the outer side. The rigidity of the split stator core 47 can be increased.

  The split stator core 47 to which the stator flange 48 is fitted is made of synthetic resin 52, and the end face support portion 49, the yoke 50, and the tooth portion 51 are integrally resin-molded to form an electrically insulating structure that houses the winding 53. is doing. The winding 53 is wound around a tooth portion 51 that is electrically insulated by a synthetic resin 52. It is difficult to maintain accuracy because the roundness of the split stator core 47 alone is easily deformed because the rigidity at the divided portion is small. Therefore, by fitting the stator flange 48, the accuracy of the stator flange 48 is followed. By increasing the accuracy of the stator flange 48, resin molding can be performed with increased accuracy and rigidity. It is suitable for forming a split stator core 47 having a large number of portions 51 and high accuracy. The Hall IC holder 45 is attached so as to face the inner diameter of the stator 41 in order to detect the magnetic pole position of the rotor 36.

  A thermal protector (not shown) is attached to the same stator surface side as the Hall IC holder 45. Since the temperature of the winding 53 is located between the metal flange 8 and the stator 41, the heat of the winding 53 is accumulated and the temperature becomes high, which is suitable for temperature detection.

  FIG. 4 relates to a conventional example, and shows a plan view in which the thermal protector 60 is attached to the stator 41. A Hall IC holder 45 and a thermal protector 60 are fixed to the outer periphery of the stator 41.

  FIG. 5 is a detailed view of a conventional thermal protector 60 mounting portion and a partial cross-sectional view of the thermal protector mounting portion. In this method, the silicon rubber 54 is applied on the winding 53, and the thermal protector 60 is placed thereon, and finally, the tight band 46 is fastened and fixed. However, in this method, the silicon rubber 54 is completely dried. 24 hours are required, and it takes time to work, and the number of parts for fixing the thermal protector is large.

  FIG. 6 is a detailed view of the mounting portion of the thermal protector 60 according to the present embodiment and a partial cross-sectional view of the mounting portion of the thermal protector 60. The thermal protector 60 is placed on the winding 53 and then covered with a heat shrinkable tube 55. The heat shrinkable tube is shrunk by heating to around 100 ° C. using a dryer or the like, and the thermal protector 60 is shortened to the winding 53. It can be fixed tightly over time. According to claim 2, since the thermal protector 60 is pulled out from the Hall IC substrate of the Hall IC holder 45, the lead wires are independently pulled out from the thermal protector and the Hall IC holder as shown in FIG. The number of connectors can be reduced as compared to the case where the number of connectors is reduced, and the number of lead wires is reduced from two to one. Therefore, the workability is good, the working time can be shortened, and the material price can be reduced.

  According to the present invention, when the thermal protector 60 is attached to the concentrated winding, the thermal protector 60 is placed on the winding 53 without applying silicon rubber, tight band, or cibrate on the winding 53, and then the heat Since only the heat shrinkage fixing is performed by covering the shrinkable tube 55, fixing with improved adhesion and workability can be remarkably improved at low cost, and variations in operating temperature can be suppressed.

1 is a longitudinal sectional view of a drum type washing and drying machine according to an embodiment of the present invention. The partial longitudinal cross-sectional view which concerns on the Example of this invention and the drive part group is attached to the outer tank 4 is shown. FIG. 4 is a longitudinal sectional view of a stator 41 according to an embodiment of the present invention. A plan view of the stator 41 according to the conventional example is shown. The detailed view of the protector fixing | fixed part in the stator 41 top view of a prior art example is shown. It concerns on the Example of this invention, and the detailed view of the protector fixing | fixed part in the stator 41 top view is shown. FIG. 4 is a detailed view of a plan view of the stator 41 when the lead wires from the protector and the Hall IC holder are drawn out, respectively, according to a conventional example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer frame 2 Base part 3 Lid 4 Outer tub 5 Rotating drum 6 Main shaft 7 Driving motor 8 Metal flange 9 Laundry 10 Dewatering hole 11 Fluid balancer 12 Bellows 13 Suspension 14, 15 Pull spring 16 Drain hose 17 Mounting leg 18 Water supply hose 19 Water supply solenoid valve 20 Water supply hose 21 Detergent tray 22 Flexible hose 23 Lifter 24 Drain valve 25 Blower fan 26 Drying filter 27 Heater 28 Spout 29 Dehumidifier 30 Ventilation path 31 Drive unit 32 Rotating drum side boss 33 Water seal 34 Outer boss 35, 42 Mounting screw 36 Rotor 37 Driving motor side boss 38, 39 Bearing 40 Nut 41 Stator 43 Motor cover 44 Flange 45 Hall IC holder 46 Tight band 47 Split stator core 48 Stator flange 49 End support 50 yoke Silicon one tooth portion 52 of synthetic resin 53 winding 54 Rubber 55 heat-shrinkable tube 60 thermal protector

Claims (2)

In the motor for driving a washing machine of which the winding method of the stator is a concentrated winding method,
A motor for driving a washing machine, wherein the temperature protection device is fixed to the winding using a heat shrinkable tube.   2. The motor for driving a washing machine according to claim 1, wherein when the motor is a brushless motor, a temperature protection device is pulled out from the Hall IC substrate.

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