JP2009077598A - Driving motor for washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator improved in rigidity by fitting a stator flange on the outer periphery of a split stator core in consideration of a conventional problem. <P>SOLUTION: In order to improve the rigidity of the stator, the stator has a structure in which the outer periphery of a less rigid split stator core is fitted in a stator flange to improve the rigidity in a radius direction of the split stator core, the metallic flange is attached through an attaching hole provided on the stator flange, a winding and the attaching hole is insulated by a resin mold, thereby improving the rigidity of the split stator iron core. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a stator for a washing machine driving motor in which a split iron core is used as a stator in a washing motor driving motor that directly drives a rotary drum in an outer tub of the washing machine, and a flange is fitted to the outer periphery thereof. It is.

  Japanese Patent Application Laid-Open No. 2005-348474 (Patent Document 1) describes a stator that is formed by press-fitting a split stator core into a frame. Japanese Patent Application Laid-Open No. 2003-201962 (Patent Document 2) describes an iron ring that is press-fitted into the outer shape of the stator core and presses the end face in the axial direction.

JP 2005-348474 A JP 2003-201962 A

  Since the drive motor for driving the rotating drum of the washing machine directly drives the rotating drum, a large driving torque is required. For this reason, the outer dimension of the stator is increased and the number of poles of the rotor is increased. In order to improve the yield of the electromagnetic steel sheet material, the divided stator core constituting the stator uses a divided core. However, since the strength at the joint portion is lower than that in the case where it is not divided, the rigidity in the radial direction is lowered. Further, since large unbalanced vibration is generated due to the unbalance of the laundry during dehydration, it is difficult to secure sufficient mounting strength even if the mounting portion to the metal flange is provided on the split stator core.

  In view of the above problems, an object of the present invention is to provide a stator having a configuration in which the radial direction of a split stator core and the rigidity of an attachment portion are increased.

  In order to increase the rigidity of the stator in the radial direction, the present invention increases the rigidity in the radial direction of the split stator core by fitting the outer periphery of the weakly divided split stator core with the stator flange. This is characterized in that the rigidity of the stator using the split stator core is increased by performing the above-described mounting through the mounting holes provided in the stator flange.

  According to the present invention, since the outer periphery of the split stator core is a stator fitted with the stator flange, the rigidity of the radial direction and the mounting portion can be increased by increasing the rigidity of the stator flange.

  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 31 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 this embodiment, the rotary drum driving motor 7 is a magnet-embedded inner rotor, and the stator 41 is a DC brushless motor having concentrated windings 51. 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, vertical, 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 1. 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.

  At the time of washing and rinsing, water necessary for washing 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 rotary 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.

  At the time of drying, since the air blown by the blower fan 25 passes through the inside and the outer periphery of the rotating drum 5 containing the laundry 9, lint is included, so it is necessary to pass through the drying filter 26 without fail.

  For this reason, it blows to the heater 27 via the drying filter 26, and the heated warm air is blown into the rotary drum 5 from the jet port portion 28 provided in the upper part of the outer tub.

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

  FIG. 2 relates to an embodiment of the present invention, and shows a partial longitudinal sectional view in which a drive unit set is attached to the outer tub 4. The drive unit set 31 is attached to the inner side of the outer tub 4 via a metal flange 8 with an attachment screw 35. 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 on the inner side and covered with rubber on the outer side. 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. A driving motor side boss portion 37 is provided on the opposite side of the rotating drum side boss portion 32 and accommodates bearings 38 and 39 for rotating and supporting the main shaft 6. A rotor 36 is inserted into the main shaft 6 and fixed by a nut 40. A stator 41 is fixed to the metal flange 8 on the outer periphery of the rotor 36 by a mounting screw 42. A motor cover 43 is attached to the stator 41 on the upper surface of the stator 41. 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 rotor 41 is used for electrical insulation.

  FIG. 3 shows a longitudinal sectional view of the stator 41 according to the embodiment of the present invention. A stator flange 46 is fitted to the outer periphery of the split stator core 45. The end face of the split stator core 45 is positioned in the axial direction by an end face support portion 47. The length of the end face support 47 is in contact with the end face of the split stator core 45 in a state that is equal to or slightly shorter than the width of the yoke 49. When the end surface support portion 47 is longer than the yoke 49, the accommodating portion of the winding 51 provided in the tooth portion 50 is reduced. Therefore, the end surface support portion 47 is approximately the same. May be. Since the split stator core 45 is formed by laminating thin magnetic steel sheets, if the inner diameter is fixed and the outer periphery is pressed strongly, the end stator needs to be restrained because it swells and deforms toward the end face. For this reason, the rigidity of the end face support 47 is increased by increasing the length of the end face support portion 47 and pressing the yoke 49 constituting the end face of the split stator core 45. By making the fitting part on the end face of the stator flange 46 and the split stator core 45 up to the outer peripheral part and the yoke 49 of the split stator core 45, the end face part is effectively deformed by the load applied to the outer side. The rigidity of the split stator core 45 can be increased.

  The split stator core 45 fitted with the stator flange 46 is made of a synthetic resin 48, and the end face support portion 47, the yoke 49, the tooth portion 50, and the mounting hole 57 are integrally resin-molded to accommodate the winding 51. A mounting hole 52 for insulating the insulating structure and the stator flange 46 from the metal flange 8 is formed. The winding 51 is wound around a tooth portion 50 that is electrically insulated by a synthetic resin 48. It is difficult to maintain the accuracy of the roundness of the split stator core 45 alone because the rigidity at the split portion is small and easily deformed. For this reason, by fitting the stator flange 46, the accuracy of the stator flange 46 is followed. Therefore, by increasing the accuracy of the stator flange, resin molding can be performed with increased accuracy and rigidity. For this reason, it is suitable for the shaping | molding of the division | segmentation stator core 45 in which the tooth part 50 has many precision.

  FIG. 4 relates to the embodiment of the present invention, and shows a front view of the stator 41. Six mounting holes 52 formed by resin molding are provided on the outer periphery of the stator flange 46. Thereby, the metal flange 8 and the stator 41 are electrically insulated. Further, a three-phase short-circuit connector 53 and a power connector 54 are formed on the upper surface at the same time, and can be connected to wiring during winding.

  FIG. 5 is a front view of the stator flange 46 according to the embodiment of the present invention. The inner side of the stator flange 46 forms a cylindrical portion 55 in which the outer periphery of the split stator core 45 is fitted in the axial direction. An end surface support portion 47 is formed on the inner diameter side at the tip of the cylindrical portion 55. Twelve detents 56 with semicircular cuts are provided inside the end face support 47. In addition, six mounting holes 57 for mounting the stator 41 are provided. The anti-rotation 56 is not very solid because the outer diameter of the split stator core 45 and the inner diameter portion of the stator flange 46 are fitted with the split core 59, so the stator flange 46 and the split stator core 45 are synthesized. The resin 48 is molded so that it does not shift in the rotational direction when a large torque is applied.

  FIG. 6 relates to an embodiment of the present invention, and shows a longitudinal sectional view of the stator flange 46. On the inside, a cylindrical portion 55 is formed in the axial direction. For this reason, since the section modulus is large in the radial direction, the structure has high rigidity. On the inner side of the cylindrical portion 55, rotation stoppers 56 are formed at equal intervals on the outer peripheral portion.

  FIG. 7 relates to the implementation of the present invention, and shows a front view of the split stator core 45. As shown in FIG. 8, the divided stator core 45 is divided into a plurality of divided cores 59 by bending the whole divided core 58 in a straight line shape with all teeth connected to each other and bending it into an arc as shown in FIG. A stator core 45 is formed. A concave portion 60 and a convex portion 61 are provided on both sides of the split iron core 59, and a circular split stator core 45 is configured in combination with the concave portion 60 and the convex portion 61 of the split iron core 59.

  A split hole 62 is formed between the tooth portions 50 in the split iron core 59. When the divided stator core 45 and the stator flange 46 are resin-molded, the synthetic resin 48 flows through the divided holes 62, and the adhesion degree of both end faces can be increased.

  The shape on the inner diameter side of the tooth portion 50 is a non-concentric shape, and the inner diameter is such that the cylinder is in line contact in the axial direction. For this reason, since it becomes difficult to measure the inner diameter accuracy, in order to maintain the roundness in advance, the stator flange 46 is used in which the inner diameter and the end face of the cylindrical portion 55 are cut to increase the accuracy.

  FIG. 10 relates to the embodiment of the present invention, and shows the material removal when all the divided cores 58 are punched out from the magnetic steel sheet by a press. The entire divided core 58 is punched by sharing the tooth portion 50 facing the slot 63 as a single space by making the tooth portion 50 face each other with the slot 63 that is the space between the tooth portion 50 and the tooth portion 50. This improves the yield of the material. For this reason, the width of the dimension of the tooth part 50 is set to a dimension that the tooth part 50 can share in the space of the slot 63 in a state of being opposed to each other. At this time, the minimum width of each other is set to be equal to or greater than the plate thickness from the punching workability of the press.

  According to the present invention, the split stator core 45 in which a plurality of split cores 59 are combined has a small radial rigidity. Therefore, the stator 41 is increased in rigidity by fitting a stator flange 46 having a large composition. .

  Further, since the number of the tooth portions 50 is as large as 42, it is necessary to perform a resin mold for insulating the winding 51 in a state where the split stator core 45 and the stator flange 46 are combined. For this reason, since the stator flange 46 having high accuracy and high rigidity is fitted to the outer diameter of the split stator core 45, the rigidity and accuracy of the split stator core 45 combined with the split core 59 can be increased. The resin core of the divided core 45, which has many tooth portions 50 and requires accuracy, can be well formed.

  In addition to increasing the rigidity of the stator flange 46 by extending the length of the end surface support portion 47 to the length of the yoke 49, the outer diameter and the end surface of the split stator core 45 are constrained. The natural frequency due to the ring vibration can be increased, and the outer tank 4 formed of synthetic resin can escape the resonance frequency with the outer tank 4 because the natural vibration frequency is low.

  As shown in the entire divided core 58, the divided core 59 is stamped and laminated in a straight state by sharing the tooth portion 50 in the space of the slot 63, so that the yield of the material used is compared with that obtained by punching in a circle. It can be greatly improved.

  In addition, although this drive motor is used for the drum type washing machine, it may be used for the drum type washing dryer or the vertical washing machine and the vertical washing machine.

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. The front view of the stator 41 which concerns on the Example of this invention is shown. The front view of the stator flange 46 according to the embodiment of the present invention is shown. FIG. 4 is a longitudinal sectional view of a stator flange 46 according to an embodiment of the present invention. The front view of the division | segmentation stator core 45 which concerns on implementation of this invention is shown. The front view of all the division | segmentation iron cores 58 is based on the Example of this invention. The front view of the division | segmentation iron core 59 concerns on the Example of this invention. This relates to the embodiment of the present invention, and shows the material removal when all the divided cores 58 are punched out of a magnetic steel sheet with a press.

Explanation 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 injection 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 set 32 Rotating drum side boss part 33 Water seal 34 Outer tank Boss portion 35, 42 Mounting screw 36 Rotor 37 Driving motor side boss portion 38, 39 Bearing 40 Nut 41 Stator 43 Motor cover 44 Flange 5 Split stator core 46 Stator flange 47 End face support portion 48 Synthetic resin 49 Relay 50 Teeth 51 Winding 52, 57 Mounting 53 three-phase shorting connector 54 Power connector 55 cylindrical portion 56 anti-rotation 58 all the divided cores 59 divided core 60 recess 61 protrusion 62 divided Hole

Claims (3)

  The outer tub of the washing machine has a drive unit set for driving the rotating drum, the drive unit set is attached to the outer tub through a metal flange, and the drive motor mounted on the drive unit set is insulated. In a washing machine drive motor that is electrically insulated from a metal flange by a stator flange having a hole, the drive motor stator is a combination of a plurality of divided iron cores to form a divided stator iron core, and a stator on the outer periphery thereof. A motor for driving a washing machine, wherein a flange is fitted.   2. The driving motor for a drum type washing machine according to claim 1, wherein the end face support portion of the stator flange is substantially equal to the width of the yoke.   3. The driving motor for a drum type washing machine according to claim 1, wherein the divided iron core is a fully divided iron core divided in units of teeth.

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