JP2017158844A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a rotor mounted on an outer shaft from deviating positionally with respect to the outer shaft without coming into contact with a bearing, in a washing machine which is constituted so as to rotate a washing and dewatering tub and a pulsator respectively.SOLUTION: A motor 12 of a washing machine 1 includes: an inner rotor 30 for driving a washing and dewatering tub 11; an outer rotor 20 for driving a pulsator 13; an inner shaft 40 for connecting the pulsator 13 to the outer rotor 20; and an outer shaft 50 for connecting the washing and dewatering tub 11 to the inner rotor 30. In the outer shaft 50, on an outer peripheral surface further on an upper end side than the inner rotor 30, a contact part 80 arranged so that the inner rotor 30 comes into contact with is provided in a protrusive manner. The contact part 80 is interposed between a ball bearing 72 and the inner rotor 30, arranged with an interval with respect to the ball bearing 72, and a retaining ring 81 is mounted on the outer shaft 50.SELECTED DRAWING: Figure 4

Description

  The technology disclosed herein relates to a washing machine.

  For example, Patent Document 1 discloses that an outer rotor (rotor of a washing motor) that rotationally drives a pulsator (agitator), an inner rotor (rotor of a dehydration motor) that rotates a washing / dehydrating tank (rotating tank), an outer rotor, A washing machine (dehydrating and washing machine) having a stator shared with an inner rotor is disclosed.

  The washing machine disclosed in Patent Document 1 also includes an inner shaft (stirring shaft) that drives and connects the pulsator to the outer rotor, and a hollow outer shaft that is inserted through the inner shaft and drives and connects the washing dewatering tank to the inner rotor ( Tank axis). The outer peripheral surface of the outer shaft is pivotally supported by two bearings arranged in the axial direction. An end portion (hereinafter referred to as “base end portion”) opposite to an end portion (hereinafter referred to as “front end portion”) connected to the laundry dewatering tub in the outer shaft is inserted into the inner rotor. It is fixed on the base end side of the two bearings.

  Patent Document 2 discloses another example of the washing machine configured as described above. In this example, the outer shaft is composed of a member (first shaft) constituting a proximal end portion and a member (second shaft) constituting a distal end portion. By adopting such a configuration, the central portion of the outer shaft in the axial direction, that is, a portion between the base end portion and the tip end portion is expanded in diameter, and the two bearings are respectively expanded by the expanded diameter portion. A stepped potion that abuts from the distal end side and the proximal end side of the shaft is formed.

Japanese Patent Laid-Open No. 11-276777 US Patent Application Publication No. 2015-0252507

  By the way, when attaching the inner rotor, there is a demand for preventing the inner rotor into which the outer shaft is inserted from being displaced with respect to the outer shaft.

  As a configuration that satisfies the above requirements, for example, it is conceivable to bring the inner rotor into contact with the lower surface of the bearing. However, when the bearing is brought into contact with the bearing, when a load is applied to the inner rotor due to fastening of a nut or the like, the inner rotor may be misaligned with the bearing or the bearing may be damaged.

  For this reason, it is conceivable to prevent the displacement of the bearing and the like by forming a step for the bearing to contact as in Patent Document 2. However, if a part of the outer shaft is enlarged in order to form such a step, it is necessary to increase the size of the bearing supporting the enlarged part by an amount corresponding to the diameter of the outer shaft. End up. It is not preferable to increase the size of the bearing in order to save space in the drive system. On the other hand, it is conceivable to reduce the diameter of a part of the outer shaft in order to form a step, but since the outer shaft is hollow, considering the fact that it becomes thinner by the reduced diameter, the durability of the part It is inconvenient.

  Therefore, in the washing machine disclosed in Patent Document 2, as described above, a step is also provided on the distal end side of the outer shaft, so that only a part between the proximal end portion and the distal end portion is expanded in diameter. The bearings are configured to have the same size on the end side and the tip side. However, in this washing machine, the outer shaft is composed of two members in order to provide a step between the distal end side and the proximal end side of the outer shaft. If configured in this manner, the accuracy and reliability of the roundness and concentricity of the outer shaft may be impaired due to misalignment between the members.

  The technology disclosed herein has been made in view of such points, and an object thereof is to provide a washing machine configured to rotate a laundry dewatering tub and a rotating body such as a pulsator, respectively. The rotor attached to the shaft is not displaced from the outer shaft without contacting the bearing.

  The technology disclosed herein includes a laundry dewatering tub that rotates about a predetermined rotation axis, a rotating body that rotates about the rotating shaft, and a motor that is configured to rotate the laundry dewatering tub and the rotating body, respectively. The motor includes a first rotor that rotationally drives the laundry dewatering tub, a second rotor that rotationally drives the rotating body, and drivingly connects the rotating body to the second rotor. An inner shaft and a hollow outer shaft through which the inner shaft is inserted and drivingly connects the laundry dewatering tub to the first rotor, and a tip portion of the outer shaft is connected to the laundry dewatering tub, The base end portion is inserted into the first rotor.

  An outer peripheral surface of the outer shaft that is more distal than the first rotor is interposed between a bearing that supports the outer shaft and the first rotor so that the first rotor contacts the outer peripheral surface. A configured contact portion is provided so as to project, and the contact portion is configured by attaching and fixing a separate positioning member to the outer shaft.

  According to this structure, a contact part is comprised by attaching and fixing a positioning member to an outer shaft. Since the abutting portion is disposed on the tip side of the first rotor and is interposed between the bearing and the first rotor, when the outer shaft is inserted to mount the first rotor The first rotor contacts the contact portion from the base end side without contacting the bearing. Since the positioning member is fixed to the outer shaft, the first rotor is disposed so as to abut against the abutting portion constituted by the positioning member, thereby preventing the positional displacement of the first rotor with respect to the outer shaft.

  Thus, the first rotor does not come into contact with the bearing at the time of mounting, and is not displaced with respect to the outer shaft.

  Further, in response to the fact that the first rotor does not contact the bearing, there is no need to provide a step for the bearing to contact. The fact that there is no need to provide a step means that there is no need to partially increase or decrease the outer diameter of the outer shaft. Therefore, it is not necessary to increase the size of the bearing, which is advantageous in saving the drive system space. Since it is not necessary to reduce the thickness of the outer shaft, it is advantageous in maintaining the durability of the outer shaft. Furthermore, since it is not necessary to configure the outer shaft from two members, it is advantageous in maintaining accuracy and reliability of the roundness and concentricity of the outer shaft.

  Further, the abutting portion is constituted by a positioning member separate from the outer shaft. By using a positioning member suitable for the configuration of the washing machine and its drive system, it is possible to change the configuration of the contact portion while suppressing the design change of the outer shaft itself. As a result, it is advantageous for sharing parts and thus reducing the manufacturing cost.

  Further, the contact portion may be arranged with a space in the axial direction of the outer shaft with respect to the bearing.

  According to this configuration, since the abutting portion is disposed at an axial interval with respect to the bearing, when a load is applied to the first rotor, the load is applied to the bearing via the abutting portion. It is prevented from joining.

  The outer shaft is pivotally supported by two bearings disposed along the axial direction of the shaft, and the outer shaft is a portion of the shaft where one of the two bearings is pivotally supported. And the outer diameter of the portion where the other of the two bearings is pivotally supported may be formed to have substantially the same diameter.

  According to this configuration, as described above, the drive shaft can be configured without increasing the size of the bearing by forming the outer shaft to have the same diameter without partially expanding the outer diameter. Is possible. This is advantageous in saving space in the drive system.

  Moreover, the said outer shaft is good also as being comprised from one member.

  According to this configuration, since the outer shaft is composed of one member, as described above, it is advantageous for maintaining the accuracy and reliability of the roundness and concentricity of the outer shaft.

  The outer peripheral surface of the outer shaft is provided with a groove that is recessed along the circumferential direction of the shaft and into which the positioning member is inserted. It is good also as being comprised by the said positioning member projecting from the said groove part when it inserts.

  As described above, according to the above configuration, the first rotor does not abut on the bearing and is not displaced with respect to the outer shaft when attached to the outer shaft.

It is a schematic perspective view of a washing machine. It is a schematic sectional drawing in the XX line of FIG. It is a schematic longitudinal cross-sectional view which shows the assembly structure of a motor. It is a longitudinal cross-sectional view which expands and shows the surrounding part A vicinity of FIG. It is a longitudinal cross-sectional view which expands and shows the enclosure part B vicinity of FIG. It is a disassembled perspective view which shows the attachment structure of the retaining ring with respect to an outer shaft.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following description is exemplary.

(Washing machine overall configuration)
In FIG. 1, the washing machine 1 of this embodiment is shown. The washing machine 1 is a fully automatic washing machine that can perform washing, rinsing, and dewatering processes by automatic control. The washing machine 1 has a vertically long rectangular box-shaped housing 2. In the upper part of the housing 2, a charging port 4 that is opened and closed by a lid 3 is formed. The laundry is taken in and out through the slot 4 (a so-called vertical washing machine). Various switches and display units operated by the user are provided behind the insertion port 4.

  As shown in FIG. 2, a tab 10, a washing / dehydrating tub 11, a motor 12, a pulsator 13, a balancer 14, a control device 15, and the like are installed inside the housing 2. In particular, in the washing machine 1, the motor 12 is devised so that an appropriate performance corresponding to each process of the washing machine 1 can be exhibited even though the size is compact. Details of the motor 12 will be described later.

  The tab 10 is a bottomed cylindrical container capable of storing water, and is suspended inside the housing 2 by a plurality of suspension members 16 with the opening directed toward the upper inlet 4. Water can be injected into the tab 10 through a water storage mechanism (not shown). A drain pipe 17 that is controlled to open and close by a valve is connected to the lower portion of the tab 10, and unnecessary water is drained to the outside of the washing machine 1 through the drain pipe 17.

  The washing / dehydrating tub 11 is a bottomed cylindrical container that is formed to be slightly smaller than the tub 10 and receives laundry. The washing / dehydrating tub 11 is accommodated in the tab 10 so as to be rotatable around a vertical axis J extending in the vertical direction with the opening directed toward the insertion port 4. All of the laundry processing is executed inside the washing and dewatering tub 11. A large number of drain holes 11a are formed in the circumferential wall having a cylindrical shape in the washing / dehydrating tank 11 (only a part is shown in the figure). A balancer 14 is installed in the opening of the washing and dewatering tank 11. The balancer 14 is an annular member that contains a plurality of balls and viscous fluid therein, and adjusts the imbalance in weight balance caused by the bias of the laundry when the washing and dewatering tub 11 rotates. A disc-shaped pulsator 13 having a stirring blade on the upper surface is rotatably installed at the bottom of the washing and dewatering tank 11. The washing / dehydrating tank 11 is an example of a “washing / dehydrating tank”, and the vertical axis J is an example of a “predetermined rotation axis”. The pulsator 13 is an example of a “rotating body”.

  The control device 15 includes hardware such as a CPU and a ROM, and software such as a control program, and comprehensively controls each process performed in the washing machine 1. The control device 15 is electrically connected to various switches, the motor 12, and the like, and the control program executes washing, rinsing, and dehydration processing according to a user instruction. For example, in the washing or rinsing process, the motor 12 rotates and rotates the pulsator 13 at a constant cycle to stir the laundry together with water and detergent. In the dehydration process, the motor 12 rotates and drives the washing and dehydration tank 11 in a fixed direction at a high speed, and depresses the laundry against the peripheral wall by the action of centrifugal force.

  In particular, the washing machine 1 is configured so that the washing and dewatering tub 11 can be rotationally driven together with the pulsator 13 during the washing and rinsing processes so that more advanced operation control can be performed.

(Motor configuration)
The motor 12 is configured to rotate the washing / dehydrating tub 11 and the pulsator 13 as described in detail below.

  Specifically, the motor 12 has a flat cylindrical appearance whose diameter is smaller than that of the tab 10 and is assembled to the lower side of the tab 10 so that the vertical axis J passes through the center thereof.

  3 to 5, the motor 12 includes an inner rotor 30, an outer rotor 20, an inner shaft 40, an outer shaft 50, a stator 60, and the like. That is, the motor 12 includes two rotors 20 and 30 inside and outside one stator 60 (dual rotor), and these rotors 20 and 30 can be connected to the pulsator 13 or the like without intervention of a clutch or an acceleration / decelerator. It is connected to the washing and dewatering tank 11 and is configured to directly drive them (direct drive). The rotors 20 and 30 share the coils 63 of the stator 60, and the motor 12 drives each of the rotors 20 and 30 independently by supplying a controlled composite current to the coils 63. Can be done. The motor 12 includes two shafts 40 and 50. These shafts 40 and 50 are connected to the two rotors 20 and 30.

  The two rotors 20 include an inner rotor 30 that rotationally drives the washing and dewatering tub 11 and an outer rotor 20 that is disposed on the outer peripheral side of the inner rotor 30 and that rotationally drives the pulsator 13. The inner rotor 30 is an example of a “first rotor”, and the outer rotor 20 is an example of a “second rotor”.

  Specifically, the inner rotor 30 is a flat bottomed cylindrical member, and has a trapezoidal inner bottom wall portion 31 having an open central portion, and a cylindrical inner portion standing around the inner bottom wall portion 31. A peripheral wall portion 32, a substantially cylindrical inner boss portion 33 integrated with a central portion of the inner bottom wall portion 31, and a plurality of inner magnets 34 are provided. The inner bottom wall portion 31 and the inner peripheral wall portion 32 are formed by pressing an iron plate, and the inner boss portion 33 is formed of a sintered alloy or the like. A shaft hole having an inner diameter larger than that of the shaft hole of the boss portion 23 and serrated on the inner peripheral surface is formed at the center of the inner boss portion 33.

  A plurality of work openings (not shown) for fastening the stator 60 to the tab 10 are formed in the inner bottom wall portion 31. Each inner magnet 34 is fixed to the outer surface of the inner peripheral wall portion 32. The plurality of inner magnets 34 are arranged so that N poles and S poles are alternately arranged continuously in the circumferential direction.

  The outer rotor 20 is a flat bottomed cylindrical member having an outer diameter larger than that of the inner rotor 30. The outer rotor 20 stands on a disc-shaped bottom wall portion 21 having an open center portion and a peripheral edge of the bottom wall portion 21. It has a cylindrical peripheral wall portion 22 provided, a boss portion 23 integrated with a central portion of the bottom wall portion 21, and a plurality of outer magnets 24. The bottom wall portion 21 and the peripheral wall portion 22 are formed by pressing an iron plate so as to function as a back yoke, and the boss portion 23 is formed of a sintered alloy or the like. A shaft hole is formed in the center of the boss portion 23. The shaft hole is serrated in the inner peripheral surface.

  The bottom wall portion 21 is formed with a plurality of slits (not shown) that radiate heat. Each outer magnet 24 is fixed to the inner surface of the peripheral wall portion 22. The plurality of outer magnets 24 are arranged so that N poles and S poles are alternately arranged continuously in the circumferential direction.

  The two shafts 40 and 50 include an inner shaft 40 that drives and connects the pulsator 13 to the outer rotor 20, and a hollow outer shaft 50 through which the inner shaft 40 is inserted and that drives and connects the washing and dewatering tub 11 to the inner rotor 30. Have.

  Specifically, the inner shaft 40 is an elongated cylindrical shaft member, and attachment portions 41 and 41 having fitting portions whose serrations are applied to the outer peripheral surface are formed at upper and lower ends thereof. By press-fitting the fitting portion into the shaft hole of the outer rotor 20, the lower mounting portion 41 is fitted into the boss portion 23, and the inner shaft 40 is inserted into the outer rotor 20. Thereafter, a nut is fastened to the lower end portion of the inner shaft 40, whereby mounting and fixing as shown in FIG. 3 is realized.

  The outer shaft 50 is a cylindrical member, and has an upper end portion 50a connected to the washing and dewatering tub 11 and a lower end portion 50b inserted into the inner rotor 30, as shown in FIG. It is configured to be axially supported by a bearing 71 disposed on the upper end 50a side along the axial direction of the outer shaft 50 and a ball bearing 72 disposed on the lower end 50b side. The upper end portion 50a of the outer shaft 50 is an example of a “tip portion”, and the lower end portion 50b is an example of a “base end portion”.

  Specifically, the outer shaft 50 is an elongated cylindrical shaft member that is shorter than the inner shaft 40 in the vertical direction and has an inner diameter larger than the outer diameter of the inner shaft 40. 4 to 6, the outer shaft 50 includes an outer diameter R1 (see FIG. 5) of a portion 50c on which the bearing 71 is pivotally supported, and a ball bearing 72 that is pivotally supported. The outer diameter R2 (see FIG. 4) of the portion 50d is formed to have the same diameter.

  The outer shaft 50 is not configured by combining a plurality of members, but is configured by one member (one component).

  In the vicinity of the upper and lower end portions 50a and 50b of the outer shaft 50, as in the case of the inner shaft 40, there are formed mounting portions 51 and 51 each having a fitting portion whose outer peripheral surface is serrated. As shown in FIG. 6, the attachment parts 51, 51 are formed one by one at the lower part of the upper end part 50 a and the upper part of the lower end part 50 b. By press-fitting these fitting portions into the shaft holes of the inner rotor 30, the lower mounting portion 51 is fitted into the inner boss portion 33, so that the lower end portion (base end portion) of the outer shaft 50 is inserted. Part) 50 b is inserted into the inner rotor 30. Thereafter, the nut 74 is fastened from below to the lower end 50b of the outer shaft 50, whereby the inner rotor 30 is attached and fixed to the outer shaft 50 as shown in FIG. A washer 76 that functions as a nut 74 is held between the lower surface of the outer shaft 50 and the upper surface of the nut 74.

  Two grooves 52 and 53 that are recessed along the circumferential direction of the shaft 50 are provided on the outer peripheral surface of the portion on the lower end 50b side when the outer shaft 50 is vertically divided into two.

  A rubber ring 75 is fitted into the groove 53 located above the two grooves 52 and 53. As shown in FIG. 4, the rubber ring 75 contacts the upper end portion of the ball bearing 72.

  A separate retaining ring 81 is fitted into the outer shaft 50 in the groove 52 located below the two grooves 52 and 53. The retaining ring 81 is a so-called C-shaped retaining ring, and has a substantially C-shape in plan view. The retaining ring 81 is configured to protrude in the radial direction from the groove portion 52 of the outer shaft 50 when fitted into the groove portion 52 and fixed. That is, the C-shaped thickness of the retaining ring 81 is wider than the depth of the groove 52.

  In the washing machine 1, the abutment portion 80 is configured by fixing the retaining ring 81 to the outer shaft 50. The contact portion 80 is provided on the outer peripheral surface of the outer shaft 50 on the tip portion 50a side of the inner rotor 30, and is interposed between the ball bearing 72 that supports the outer shaft 50 and the inner rotor 30, and The inner rotor 30 is configured to abut.

  Specifically, the abutting portion 80 extends along the circumferential direction of the shaft 50 and protrudes in the radial direction on the outer circumferential surface of the outer shaft 50 by the retaining ring 81 fitted in the groove portion 52. It is configured. As shown in FIG. 4, a predetermined interval is provided in the axial direction between the upper end of the contact portion 80 (specifically, the upper surface of the retaining ring 81) and the lower end of the ball bearing 72.

  When the outer shaft 50 is inserted into the inner boss portion 33 of the inner rotor 30 in order to attach the inner rotor 30, the abutting portion 80 is the lower surface (specifically, the lower surface of the retaining ring 81). ) And the upper surface of the inner boss portion 33 are in contact with each other. Therefore, the inner rotor 30 is sandwiched between the contact portion 80 and the nut 74 in a state where the nut 74 is fastened.

  The stator 60 is arranged between the inner rotor 30 and the outer rotor 20 and is configured to be shared by the inner rotor 30 and the outer rotor 20.

  Specifically, the stator 60 projects from the inner peripheral edge of the upper portion of the annular body portion 60a having an outer diameter smaller than the inner diameter of the outer rotor 20 and larger than the outer diameter of the inner rotor 30 to the center side. And is formed by resin molding.

(Motor assembly)
As shown in FIG. 4, the stator 60 is attached to a motor bracket 70 provided on the bottom surface of the tab 10 by fastening a flange portion 60 b. The outer shaft 50 to which the inner rotor 30 is coupled is rotatably supported by the motor bracket 70 via a bearing 71 and a ball bearing 72 that are aligned vertically. By attaching the bracket 77 fixed to the washing and dewatering tub 11 to the upper mounting portion 51 protruding inside the tab 10, the upper end portion 50 a of the outer shaft 50 is fixed to the washing and dewatering tub 11. .

  The inner shaft 40 to which the outer rotor 20 is connected is inserted into the lower end portion of the outer shaft 50 so that the upper end portion protrudes into the washing and dewatering tub 11. The inner shaft 40 is rotatably supported by the washing / dehydrating tub 11 and the outer shaft 50 via upper and lower inner bearings 73, 73. The upper end portion of the inner shaft 40 is fixed to the pulsator 13 by fastening in a state in which the fitting portion of the upper mounting portion 41 is fitted in the mounting hole formed in the center portion of the pulsator 13.

  The stator 60, the inner rotor 30, and the outer rotor 20 are assembled so that the inner rotor 30 and the outer rotor 20 face the stator 60 with a slight gap therebetween. In the motor 12, by supplying a controlled composite current to the stator 60, a magnetic field that periodically varies in each coil 63 is formed.

  The periodic magnetic field fluctuations act on each of the inner magnet 34 and the outer magnet 24, so that an integrated structure including the inner rotor 30, the outer shaft 50, and the washing and dewatering tub 11, the outer rotor 20 and the inner magnet The integral structure composed of the shaft 40 and the pulsator 13 is individually driven to rotate about the vertical axis J.

(Summary)
As described above, according to the above configuration, the contact portion 80 is configured by attaching and fixing the retaining ring 81 to the outer shaft 50. The contact portion 80 is disposed on the upper end (tip) side of the inner rotor 30 and is interposed between the ball bearing 72 and the inner rotor 30, so that the outer shaft can be attached to the inner rotor 30. When 50 is inserted, the inner rotor 30 comes into contact with the contact portion 80, not the ball bearing 72, from the lower end (base end) side. Since the retaining ring 81 is fixed to the outer shaft 50, the inner rotor 30 is disposed so as to abut on the abutting portion 80 constituted by the retaining ring 81, thereby preventing the displacement of the inner rotor 30. .

  Thus, when the inner rotor 30 is attached to the outer shaft 50, the inner rotor 30 does not come into contact with the ball bearing 72 and is not displaced with respect to the outer shaft 50.

  Further, the contact portion 80 is configured by attaching a separate positioning member (stop ring 81) to the outer shaft 50. By using a positioning member suitable for the configuration of the washing machine and its drive system, the configuration of the contact portion 80 can be changed while suppressing the design change of the outer shaft 50. As a result, it is advantageous for sharing parts and thus reducing the manufacturing cost.

  Further, since the abutting portion 80 is disposed with an interval in the axial direction with respect to the ball bearing 72, when a load is applied to the inner rotor 30, the load is applied to the ball via the abutting portion 80. Participation in the bearing 72 is prevented.

  The outer shaft 50 is formed such that the outer diameter R1 of the portion 50c on which the bearing 71 is pivotally supported and the outer diameter R2 of the portion 50d on which the ball bearing 72 is pivotally supported are the same diameter. Thus, the drive system can be configured without increasing the size of the bearing. This is advantageous in saving space in the drive system.

  Moreover, since the outer shaft 50 is comprised from one component, it becomes advantageous when maintaining the precision of circularity of the outer shaft 50, concentricity, and reliability.

<< Other Embodiments >>
About the said embodiment, it is good also as following structures.

  The configuration of the washing machine 1 is an example, and is not limited to this configuration.

  In the said embodiment, although the washing machine 1 was comprised so that washing, rinsing, and a spin-drying | dehydration process might be performed, it is not restricted to this structure. For example, a drying process may be performed.

  In the said embodiment, although the tab 10 and the washing | cleaning and dehydration tank 11 were arrange | positioned so that each opening might face upwards, it is not restricted to this structure. For example, you may comprise as what is called a drum-type washing machine which orientated each opening sideways or diagonally upward.

  In the above-described embodiment, the inner shaft 40 and the outer shaft 50 are configured by two shafts. However, a configuration in which three or more shafts are provided by interposing a clutch or an acceleration / decelerator between the rotors 20 and 30 is provided. May be. The motor 12 is not limited to the direct drive system.

  In the above-described embodiment, the C-shaped retaining ring 81 is used as the positioning member, but the configuration is not limited thereto. A retaining ring other than the C shape may be used, or a member other than the retaining ring may be used.

  Moreover, in the said embodiment, although the motor 12 was comprised so that the washing dehydration tank 11 and the rotary body (pulsator) 13 might be rotated separately, it is not restricted to this structure. The motor 12 should just be comprised so that the washing | cleaning dehydration layer 11 and the rotary body 13 may each be rotated. As such a configuration, for example, a configuration in which the laundry dewatering layer 11 and the rotating body 13 are relatively rotated is conceivable. In that case, for example, it is conceivable to employ a motor that rotates the laundry dewatering layer 11 and the rotating body 13 at a predetermined ratio. When such a motor is employed, each time the laundry dewatering layer 11 rotates once, the rotating body rotates according to the number of rotations defined by the ratio. Moreover, you may rotate the washing | cleaning dehydration layer 11 and the rotary body 13 synchronizing.

  Moreover, in the said embodiment, although the pulsator 13 was illustrated as a rotary body, it is not restricted to this structure. Even a mechanism used in the washing, rinsing, dehydrating, and drying processes of the washing machine 1 (for example, a mechanism related to water circulation or a mechanism related to air blowing during drying), or a member for driving such a mechanism Good.

1 Washing machine 10 Tab 11 Washing / dehydration tank (washing dehydration tank)
12 Motor 13 Pulsator (Rotating body)
20 Outer rotor (second rotor)
30 Inner rotor (first rotor)
40 Inner shaft 50 Outer shaft 52 Groove 60 Stator 71 Bearing 72 Ball bearing (bearing)
80 Contact part 81 Retaining ring (positioning member)
R1 Outer shaft outer diameter (outer diameter of the part where one of the bearings is supported)
R2 Outer shaft outer diameter (outer diameter of the part where the other bearing is pivotally supported)

Claims (5)

A washing machine comprising: a washing / dehydrating tub rotating around a predetermined rotation axis; a rotating body rotating around the rotation axis; and a motor configured to rotate the washing / dehydrating tub and the rotating body, respectively. And
The motor includes a first rotor that rotationally drives the washing and dewatering tub, a second rotor that rotationally drives the rotating body, an inner shaft that drives and connects the rotating body to the second rotor, and the inner shaft is inserted therethrough. A hollow outer shaft for drivingly connecting the laundry dewatering tub to the first rotor;
While the distal end portion of the outer shaft is connected to the washing / dehydrating tub, the base end portion is inserted into the first rotor,
The outer shaft of the outer shaft is arranged between the bearing supporting the outer shaft and the first rotor on the outer peripheral surface on the front end side of the first rotor so that the first rotor comes into contact therewith. The abutment part protrudes,
The contact portion is a washing machine configured by attaching and fixing a separate positioning member to the outer shaft. The washing machine according to claim 1,
The abutting portion is a washing machine in which the abutting portion is disposed at an interval in the axial direction of the outer shaft with respect to the bearing. In the washing machine according to claim 1 or 2,
The outer shaft is pivotally supported by two bearings arranged along the axial direction of the shaft,
In the outer shaft, the outer diameter of the portion where one of the two bearings is pivotally supported on the shaft is substantially the same as the outer diameter of the portion where the other of the two bearings is pivotally supported. Washing machine formed in diameter. In the washing machine according to any one of claims 1 to 3,
The outer shaft is a washing machine composed of one member. In the washing machine according to any one of claims 1 to 4,
The outer peripheral surface of the outer shaft is provided with a groove that is recessed along the circumferential direction of the shaft and into which the positioning member is inserted.
The contact portion is a washing machine configured such that when the positioning member is fitted into the groove, the positioning member protrudes from the groove.

Images