JP5948570B2 - Motor for washing machine - Google Patents

Description

  The present invention relates to a motor for a washing machine.

  The drum type washing machine has a rotating drum having an axis of rotation in a horizontal direction or an inclined direction, and transmits the power of the motor to the rotating drum via a belt and a pulley. Conventionally, in such a drum-type washing machine, a brush motor (for example, see Patent Document 1) and an induction motor (for example, see Patent Document 2) that have been applied as the motor have a frame made of aluminum or the like. Steel plate motors have been used.

  FIG. 14 is a schematic cross-sectional view of a conventional drum-type washing machine. As shown in FIG. 14, the conventional drum-type washing machine 50 includes a rotating drum 51, a water tank 52, a pulley 54, and a motor 60. The water tank 52 rotatably supports a rotary drum 51 having an axis of rotation in the horizontal direction or the tilt direction. A pulley 54 that transmits power to the rotary drum 51 via the drum rotation shaft 53 is disposed on the back surface of the water tank 52. The motor 60 transmits power to the pulley 54 via the belt 55. Further, as shown in FIG. 14, the motor 60 is generally fixed below the water tank 52.

  FIG. 15 is a schematic configuration diagram of a conventional motor. 14 and 15, the conventional motor 60 includes a stator 61, a rotor (not shown) rotatably supported with a shaft 62 inside the stator 61, an output side bracket 63, an anti-output side bracket 64, and the like. It consists of Usually, the output side bracket 63 and the counter output side bracket 64 form a shell of the motor 60 and also have a function as a fixing means to the water tank 52. Further, the shape and dimensions of the output side bracket 63 and the non-output side bracket are determined in accordance with the structure and dimensions of the motor fixing portion in the water tank 52.

  However, in the conventional motor, the structure and dimensions of the motor fixing portion in the water tank 52 are changed depending on the configuration of the drum type washing machine, and the output side bracket 63 and the counter output side bracket 64 are all changed in accordance with this change. Need arises. For this reason, only the kind of fixing means requires different molds and parts, and there is a problem that the sharing of parts and the like is hindered and the cost is increased.

JP 2009-78056 A JP 2009-297123 A

The washing machine motor of the present invention is a washing machine motor that drives a rotating drum in a drum type washing machine including a rotating drum, a water tub, and a pulley. The rotating drum accommodates the laundry and has an axis of rotation in the horizontal or inclined direction. The water tank contains a rotating drum and is elastically supported in the washing machine body. The pulley is attached to the rear surface of the water tank, and transmits power to the rotating drum via the drum rotating shaft. The washing machine motor transmits power to the pulley via a belt and is fixed below the water tank. The washing machine motor includes a stator, a rotor, and an outer shell. The stator includes at least a stator core, a winding, and a winding insulator. The rotor is connected to a belt, has at least a rotor core and a magnet, and is rotatably held. The outer shell mechanically holds the stator and the rotor . The outer shell is composed of a bracket that holds the rotor and a mold part that contains the stator. The mold portion, for fixing the water tank, a separate fixed portion of the separate body attached to the mold part. The separate fixing part includes a separate fixing part integrated with the bracket.

  Thereby, it is possible to cope with the fixing structure and dimensions of the motor in various drum type washing machines by changing only the shape and dimensions of the separate fixing portion. As a result, it is possible to configure a motor that can be attached to a washing machine with only a minimum change in molds and parts, and cost can be reduced.

FIG. 1 is a schematic cross-sectional view of a drum-type washing machine equipped with a washing machine motor according to Embodiment 1 of the present invention. FIG. 2 is a schematic perspective view of the motor according to Embodiment 1 of the present invention. FIG. 3 is a schematic perspective view of the main body mold portion in the motor according to Embodiment 1 of the present invention. FIG. 4 is a schematic perspective view of a separate fixing portion in the motor according to Embodiment 1 of the present invention. FIG. 5 is a schematic perspective view of another separate fixing portion in the motor according to Embodiment 1 of the present invention. FIG. 6 is a configuration diagram of a stator in the motor according to Embodiment 1 of the present invention. FIG. 7 is a configuration diagram of the rotor in the motor according to the first embodiment of the present invention. FIG. 8 is a schematic cross-sectional view of the rotor core in the motor according to Embodiment 1 of the present invention. FIG. 9 is a schematic perspective view of a motor according to Embodiment 2 of the present invention. FIG. 10 is a schematic perspective view of the main body mold part, the separate fixing part, and the integral fixing part in the motor according to Embodiment 3 of the present invention. FIG. 11 is a schematic perspective view of a main body mold portion and a separate fixing portion in a motor according to Embodiment 4 of the present invention. FIG. 12 is a schematic perspective view of the main body mold part and the separate fixing part in the motor according to Embodiment 5 of the present invention. FIG. 13: is a schematic perspective view of the main body mold part and separate fixing | fixed part in another form in the motor which concerns on Embodiment 5 of this invention. FIG. 14 is a schematic sectional view of a drum type washing machine equipped with a conventional motor. FIG. 15 is a schematic configuration diagram of a conventional motor.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is a schematic cross-sectional view of a drum-type washing machine equipped with a motor according to Embodiment 1 of the present invention. As shown in FIG. 1, the drum type washing machine 10 includes a rotating drum 11, a water tank 12, a pulley 14, and a motor 20a. The rotating drum 11 accommodates the laundry and has an axis of rotation in the horizontal or inclined direction. The water tank 12 encloses the rotating drum 11 and is elastically supported in the washing machine body.

  A pulley 14 that transmits power to the rotary drum 11 via the drum rotation shaft 13 is attached to the back surface of the water tank 12. The motor 20 a transmits power to the pulley 14 via the belt 15. As shown in FIG. 1, the motor 20 a is fixed below the water tank 12.

  FIG. 2 is a schematic perspective view of the motor according to Embodiment 1 of the present invention. FIG. 3 is a schematic perspective view of a main body mold portion in the motor according to Embodiment 1 of the present invention. FIG. 4 is a schematic perspective view of a separate fixing portion in the motor according to Embodiment 1 of the present invention. FIG. 5 is a schematic perspective view of another separate fixing portion in the motor according to Embodiment 1 of the present invention. FIG. 6 is a configuration diagram of a stator in the motor according to the first embodiment of the present invention. FIG. 7 is a configuration diagram of the rotor in the motor according to the first embodiment of the present invention. FIG. 8 is a schematic cross-sectional view of the rotor core in the motor according to Embodiment 1 of the present invention.

  As shown in FIGS. 2 to 5, the motor 20 a includes a stator 30 and a rotor 40. The stator 30 and the rotor 40 are mechanically held by an outer shell composed of the bracket 22 and the main body mold portion 21 (FIG. 3). The main body mold portion 21 has separate fixing portions 23a and 23b (FIG. 4) and separate fixing portions 23c and 23d (FIG. 5) that are separate from the main body mold portion 21 for fixing the motor 20a to the water tank 12. And are attached. The rotor 40 is rotatably held by the bracket 22 via a bearing 45.

  The body mold part 21 contains the stator 30 shown in FIG. The stator 30 includes at least a stator core 34, a winding 33, and a winding insulating material 32. The stator core 34 is usually configured by laminating thin iron plates. The winding 33 is wound around the stator core 34 via the winding insulating material 32. The main body mold portion 21 is configured by molding the stator core 34, the winding insulating material 32, and the winding 33.

  As shown in FIG. 7, the rotor 40 includes a rotor core 43, a resin mold 44, a motor shaft 41, a motor pulley 42, and a bearing 45. The rotor core 43 is usually configured by laminating thin iron plates. The resin mold 44 molds the rotor core 43. The motor shaft 41 and the motor pulley 42 transmit the power generated by the rotor 40 to the rotating drum 11. The bearing 45 holds the rotor 40 rotatably.

  As shown in FIG. 8, the rotor core 43 has an IPM (Interior Permanent Magnet) structure in which a magnet 48 is inserted into a magnet hole 46. Both the rotor core 43 and the magnet 48 are molded by a resin mold 44. Further, the rotor 40 is configured by inserting the motor shaft 41 into the shaft hole 47.

  The motor 20a according to the first embodiment of the present invention described above includes the main body mold portion 21, the stator 30, and the rotor 40, so that the separate fixing portion can be used while sharing parts and maintaining the motor performance. By simply changing 23a, 23b, 23c, and 23d, the drum type washing machine 10 having a different fixing method and structure can be attached. Therefore, the motor 20a according to the first embodiment of the present invention can cope with different fixing methods while maintaining the motor performance with only a minimum mold change and component change, and is suitable for reducing the cost of the motor. It is.

  In Embodiment 1 of the present invention, the separate fixing part 23a and the separate fixing part 23b are shown as the same shape, and the separate fixing part 23c and the separate fixing part 23d are shown as the same shape. However, the types of shapes of the separate fixing portions 23a, 23b, 23c, and 23d are not limited to this. For example, when all the shapes are different, or any three separate fixing portions have the same shape. The same effect can be obtained even in the case of only one different shape.

(Embodiment 2)
FIG. 9 is a schematic perspective view of a motor according to Embodiment 2 of the present invention. In addition, the motor 20b shown in FIG. 9 is also fixed to the drum type washing machine 10 as shown in FIG. 1 as in the first embodiment.

  The motor 20 b has integral fixing portions 24 a and 24 b integrated with the main body mold portion 21, and a separate fixing portion 23 c is attached to the main body mold portion 21. In addition, since the configurations of the bracket 22 and the rotor 40 are the same as those of the first embodiment, the description thereof is omitted.

  The integral fixing portions 24 a and 24 b are integrated with the main body mold portion 21 and are made of the same resin mold material as that of the main body mold portion 21. On the other hand, in order to attach the motor 20b to the drum type washing machine 10 shown in FIG. 1 more firmly, the separate fixing portion 23c is made of a metal material having higher strength than the main body mold portion 21, such as aluminum. May be.

  In the motor 20b according to the second embodiment of the present invention described above, the low cost of the motor can be coped with by attaching to a drum type washing machine having a different fixing method and structure only by changing the separate fixing portion 23c. Can be achieved. Furthermore, since it becomes possible to improve the strength of attachment by the separate fixing | fixed part 23c, a highly reliable motor can be implement | achieved.

(Embodiment 3)
FIG. 10 is a schematic perspective view of the main body mold portion, the separate fixing portion, and the integral fixing portion in the motor according to Embodiment 3 of the present invention. FIG. 10 shows a state in which separate fixing portions 23a and 23b are attached to the main body mold portion 21 integrated with the integrated fixing portions 24c and 24d. Since the structure of the bracket 22 and the rotor 40 is the same as that of the first embodiment, description thereof is omitted. The main body mold portion 21 is molded by including the stator 30 shown in FIG. 6 and is the same as that of the first embodiment described above, and thus detailed description thereof is omitted.

  In the motor according to the third embodiment of the present invention described above, the separate fixing portions 23a and 23b and the integral fixing portions 24c and 24d are disposed at positions opposite to the axial direction from the above-described second embodiment. . Thereby, it can respond to the attachment to the drum type washing machine different from the case shown in Embodiment 2. FIG. Moreover, although the separate fixing | fixed part 23a, 23b is made into the same shape in FIG. 10, a different shape may be sufficient. By having a plurality of separate fixing parts 23a, 23b, it is possible to change the minimum parts in order to cope with different attachment states to the drum type washing machine. In addition, the number of attachment states that can be applied to the drum type washing machine is increased, and the cost of the motor can be reduced.

(Embodiment 4)
FIG. 11 is a schematic perspective view of a main body mold portion and a separate fixing portion in a motor according to Embodiment 4 of the present invention. FIG. 11 shows a state in which the main body mold portion 21, the separate fixing portion 25 integrated with the bracket 45, and other separate fixing portions 23c and 23d are assembled. Since the configurations of the bracket 22 and the rotor 40 disposed on the opposite side to the separate fixing portion 25 are the same as those in the first embodiment, the description thereof is omitted. The main body mold portion 21 is molded by including the stator 30 shown in FIG. 6 and is the same as that of the first embodiment described above, and thus detailed description thereof is omitted.

  In the motor according to the fourth embodiment of the present invention described above, since the separate fixing portion 25 holds the bearing 45, the number of parts can be reduced. The separate fixing portion 25 is preferably made of a metal material, but may be made of other materials as long as it has sufficient accuracy and strength to hold the bearing 45.

  Further, it is possible to attach to different drum-type washing machines only by changing the shapes of the separate fixing part 25 and the separate fixing parts 23c, 23d, which is suitable for reducing the cost of the motor.

(Embodiment 5)
FIG. 12 is a schematic perspective view of the main body mold portion and the separate fixing portion in the motor according to Embodiment 5 of the present invention. FIG. 12 shows a state in which separate fixing parts 23 a, 23 b, 23 c, and 23 d are attached to the main body mold part 21. Since the structure of the bracket 22 and the rotor 40 is the same as that of the first embodiment, description thereof is omitted. The main body mold portion 21 is molded by including the stator 30 shown in FIG. 6 and is the same as that of the first embodiment described above, and thus detailed description thereof is omitted.

  In the motor according to the fifth embodiment of the present invention described above, all of the separate fixing portions 23a, 23b, 23c, and 23d have different shapes. Moreover, the separate fixing | fixed part 23a, 23c inserts the substantially cylindrical convex part 26 which itself has into the attachment part of a drum type washing machine, and is fixed. On the other hand, the separate fixing portions 23b and 23d are attached to the drum type washing machine using the through holes 27 provided in the separate fixing portions 23b and 23d. When high strength is required for the convex portion 26, the separate fixing portions 23a and 23c are preferably made of a material having high strength such as a metal material.

  Furthermore, the combination of the separate fixing portions 23a, 23b, 23c, and 23d, the positions of the separate fixing portions 23a, 23d, and the like can be configured according to the mounting structure of the drum type washing machine, even if it is not as shown in FIG. Is possible. Therefore, even in a state where the main body mold part 21 and the like are shared, various motor structures can be selected according to the mounting structure, required strength, etc., and the number of parts to be changed can be minimized. Thereby, it is possible to reduce the cost of the motor.

  FIG. 13: is a schematic perspective view of the main body mold part and separate fixing | fixed part in another form in the motor which concerns on Embodiment 5 of this invention. 13 is obtained by changing the separate fixing portion 23b of FIG. 12 into an integrated fixing portion 24b integrated with the main body mold portion 21. As shown in FIG. Also in the configuration shown in FIG. 13, the same effect as in the configuration shown in FIG. 12 described above can be obtained.

  In the embodiment described above, an example in which the total number of separate fixing parts and integral fixing parts is three or four has been shown. However, according to the mounting structure of the drum type washing machine, two Or it is good also as four or more. Even in this case, the same effects as those of the embodiment described above can be obtained.

  Although the motor types of the first to fifth embodiments are shown as IPM rotor type brushless motors, an SPM (Surface Permanent Magnet) rotor in which the magnet 48 shown in FIG. A type of brushless motor may be used. In addition to the brushless motor, other types such as a universal motor and an induction motor may be used. The same effect can be obtained even in motors other than the IPM rotor type. Furthermore, regardless of the material of the individual parts such as the material of the magnet 48, the same effect can be obtained if the material and shape of the separate fixing portion and the integral fixing portion are appropriately designed.

  As described above, the washing machine motor of the present invention is a washing machine motor that drives a rotating drum in a drum type washing machine including a rotating drum, a water tub, and a pulley. The rotating drum accommodates the laundry and has an axis of rotation in the horizontal or inclined direction. The water tank contains a rotating drum and is elastically supported in the washing machine body. The pulley is attached to the rear surface of the water tank, and transmits power to the rotating drum via the drum rotating shaft. The washing machine motor transmits power to the pulley via a belt and is fixed below the water tank. The washing machine motor includes a stator, a rotor, and an outer shell. The stator includes at least a stator core, a winding, and a winding insulator. The rotor is connected to a belt, has at least a rotor core and a magnet, and is rotatably held. A separate fixing part separate from the outer shell for mechanically holding the stator and the rotor and fixing the stator and the rotor to the water tank is attached to the outer shell. A motor for a washing machine is configured by assembling the outer shell and the separate fixing portion.

  Thereby, it is possible to cope with the fixing structure and dimensions of the motor in various drum type washing machines by changing only the shape and dimensions of the separate fixing portion. As a result, it is possible to configure a motor that can be attached to a washing machine with only a minimum change in molds and parts, and cost can be reduced.

  In the washing machine motor of the present invention, the outer shell has a plurality of fixing portions for fixing to the water tank. The fixing portion includes an integral fixing portion that is integrated with the outer shell, and a separate fixing portion that is separated from the outer shell. A motor is constituted by assembling the outer shell and the separate fixing portion. As a result, it is possible to configure a motor that can be attached to a washing machine with only a minimum change in molds and parts, and cost can be reduced.

  In the washing machine motor of the present invention, at least the stator core, the winding, and the winding insulator of the stator have a molded part formed of a resin material. The molded part forms an outer shell. As a result, no penetration of water or the like into the winding can be prevented, so that deterioration in reliability such as insulation deterioration can be prevented, and cost reduction and high reliability can be achieved.

  The washing machine motor of the present invention has a plurality of separate fixing portions. Thereby, even if it is a drum type washing machine from which the fixing structure to a water tank of a motor and a dimension differ, it can attach with a separate fixing | fixed part, sharing a stator and a rotor. As a result, the types of washing machines that can be attached can be increased, and the cost can be reduced because the basic configuration of the motor need not be increased.

  In the washing machine motor of the present invention, the separate fixing portion is made of a resin material. Thereby, when strength is not required, an inexpensive material can be used, and the cost can be reduced.

  In the washing machine motor of the present invention, the separate fixing portion is made of a metal material. Thereby, even if it is a case where intensity | strength is calculated | required, the motor which can respond can be comprised.

  The washing machine motor of the present invention has both a separate fixing part made of a resin material and a separate fixing part made of a metal material. As a result, it is possible to use a metal material at a location where higher strength is required, and an inexpensive material at a location where strength is not required, thereby achieving both high reliability and low cost.

  In the washing machine motor of the present invention, the fixed portion is made of the same material as the molded portion of the stator. Thereby, since the kind of material is not increased, a low-cost motor including a management surface can be realized.

  In the washing machine motor of the present invention, at least the rotor core and the magnet are molded by a resin material in the rotor. Thereby, since water etc. do not permeate into the magnet portion, problems such as magnet rust do not occur, and a low-cost but highly reliable motor can be realized.

  As described above, the motor for a washing machine according to the present invention has a separate fixing part, so that the shape and dimensions of the separate fixing part can be fixed to the fixing structure and dimensions of the motor in various drum-type washing machines. It can be installed by changing only. Thereby, the motor which can be attached to a washing machine can be comprised only with the minimum metal mold | die and component change. Furthermore, since the separate fixing portion may be made of a material having high strength according to the required strength, a low-cost and highly reliable motor can be provided. Accordingly, the present invention can be applied to applications such as home appliances represented by drum-type washing machines.

DESCRIPTION OF SYMBOLS 10 Drum-type washing machine 11 Rotating drum 12 Water tank 13 Drum rotating shaft 14 Pulley 15 Belt 20a, 20b Motor 21 Main body mold part 22 Bracket 23a, 23b, 23c, 23d, 25 Separate fixing part 24a, 24b, 24c, 24d Integrated fixing Part 30 Stator 32 Winding insulating material 33 Winding 34 Stator core 40 Rotor 41 Motor shaft 42 Motor pulley 43 Rotor core 44 Resin mold 45 Bearing 46 Magnet hole 47 Shaft hole 48 Magnet

Claims (9)

A rotating drum for storing the laundry and having an axis of rotation in the horizontal or inclined direction;
A water tub containing the rotating drum and elastically supported in the washing machine body;
In the drum-type washing machine provided with the pulley attached to the rear surface of the water tank and transmitting power to the rotating drum via a drum rotation shaft,
A motor for a washing machine that transmits power to the pulley via a belt and drives the rotating drum fixed below the water tank;
A stator composed of at least a stator core, a winding and a winding insulator;
A rotor connected to the belt, having at least a rotor core and a magnet, and rotatably held;
An outer shell for mechanically holding the stator and the rotor,
The outer shell is composed of a bracket that holds the rotor, and a mold part that includes the stator,
Wherein the mold portion, for fixing the water tank, a separate fixed portion of the separate body attached to the mold part,
The washing machine motor , wherein the separate fixing portion includes a separate fixing portion integrated with the bracket . The motor for a washing machine according to claim 1, further comprising an integral fixing portion that is integrated with the outer shell and is fixed to the water tank. At least the stator core and winding a winding insulating material, for a washing machine motor according to claim 1 which is characterized by having the mold portion molded by a resin material in the stator. The washing machine motor according to claim 1, wherein a plurality of the separate fixing portions are owned. The washing machine motor according to claim 1, wherein the separate fixing portion is a resin material. The washing machine motor according to claim 1, wherein the separate fixing portion is a metal material. The motor for a washing machine according to claim 1, comprising both the separate fixing portion made of a resin material and the separate fixing portion made of a metal material. Washer motor according to claim 3 which is characterized in that the another fastening units is the same material as the mold portion of the stator. The motor for a washing machine according to claim 1, wherein at least a rotor core and a magnet in the rotor are molded by a resin material.

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