JP2014083383A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine capable of reducing size and weight of a motor and improving a water pumping effect.SOLUTION: A washing machine 1 includes: a washing tub 3 for accommodating laundry; a water pumping passage 18 for pumping up washing liquid in the washing tub 3 from a bottom 12 of the washing tub 3 and returning it to the washing tub 3; a motor 4; a water pumping vane 5 provided at the bottom 12 of the washing tub 3; and a rotary vane 6 provided in the washing tub 3. The water pumping vane 5 is directly connected to an output shaft 29 of the motor 4, and sends the washing liquid in the washing tub 3 to the water pumping passage 18 from the bottom 12 by receiving a driving force of the motor 4 and rotating at relatively high speed. The rotary vane 6 is connected to the water pumping vane 5 via a speed reduction mechanism 60, and agitates the laundry in the washing tub 3 by receiving a rotation force of the water pumping vane 5 and rotating relatively at low speed.

Description

  The present invention relates to a washing machine.

  In the washing machines of the following Patent Documents 1 to 3, a rotating blade for stirring the laundry is rotatably provided at the bottom of the washing and dewatering tub, and between the bottom of the washing and dewatering tub and the rotating wing. Is provided with a water pumping blade rotatably. A drive shaft of a drive motor is directly connected to the rotary blade, and the pumping blade is connected to the rotary blade via a planetary gear mechanism. Therefore, the driving force of the drive motor is transmitted to the rotor blades, and then transmitted to the pumped water blades through the planetary gear mechanism. Further, a pumping passage is provided on the inner wall of the washing and dewatering tank. When the pumping blade rotates, the washing liquid at the bottom of the washing tub is fed into the pumping passage by the pump blades of the pumping wing to rise in the pumping passage, and is returned from the discharge port of the pumping passage to the washing and dewatering tub.

Japanese Patent No. 4873066 Japanese Patent No. 4811504 JP 2010-94248 A

To reduce the size and weight of a motor, a member driven at high speed and low torque is directly connected to the output shaft of the motor, while a member driven at low speed and high torque is connected to the motor output shaft via a speed reduction mechanism. It is desirable to drive through a speed reduction mechanism.
The rotor that stirs the laundry is loaded with water and laundry in an amount corresponding to the maximum rating of the washing machine, while it is necessary to prevent the pain of the laundry due to the rotation of the rotor. Therefore, it is necessary to drive the rotor blade with a high torque according to the load described above while rotating at a relatively low speed so as not to damage the laundry. Conversely, in the case of a pumping blade, in order to increase the pumping effect by increasing the amount of washing liquid raised in the pumping passage, it is necessary to rotate the pumping blade at a relatively high speed. The minimum torque is sufficient to raise the washing liquid in the pumping passage.

However, in the case of the washing machines disclosed in Patent Documents 1 to 3, the low-speed / high-torque rotary blades are directly connected to the drive shaft of the drive motor, and the high-speed / low-torque pumping blades are driven via the planetary gear mechanism. It is connected to the drive shaft. This limits the reduction in size and weight of the drive motor and the improvement of the pumping effect.
The present invention has been made under such a background, and an object thereof is to provide a washing machine capable of reducing the size and weight of a motor and improving the pumping effect.

  The invention according to claim 1 is provided in the washing tub for storing the laundry and the washing tub, for pumping the washing liquid in the washing tub from the bottom of the washing tub and returning it to the washing tub. A pumping path, a motor having an output shaft for outputting a driving force, and provided at the bottom of the washing tub, directly connected to the output shaft of the motor and receiving a driving force of the motor to relatively high speed A first wing that feeds the washing liquid in the washing tub from the bottom to the pumping path by rotating; and is provided in the washing tub and is connected to the first wing through a speed reduction mechanism; And a second wing that stirs the laundry in the washing tub by rotating at a relatively low speed in response to the rotational force of the one wing.

  According to a second aspect of the present invention, the speed reduction mechanism includes a sun gear fixed to the first wing, and is rotatably supported by the second wing and meshes with the sun gear around the sun gear. A plurality of planetary gears capable of revolving, and an outer ring gear fixed to the washing tub and meshing with the plurality of planetary gears, wherein the second wing is rotated in the same direction as the first wing. The washing machine according to claim 1.

The invention according to claim 3 is the washing machine according to claim 2, wherein the first wing is provided at a position closer to the bottom of the washing tub than the second wing.
According to a fourth aspect of the present invention, the bottom of the washing tub includes a double bottom structure including a first bottom wall on the second wing side and a second bottom wall farther from the second wing than the first bottom wall. Wherein the first blade is disposed between the first bottom wall and the second bottom wall, and the outer ring gear is fixed to the first bottom wall. A washing machine according to claim 3.

The invention according to claim 5 is characterized in that a plurality of pumping blades extending radially from the rotation center of the first blade are provided on the surface of the first blade opposite to the second blade. The washing machine according to claim 3 or 4.
A sixth aspect of the present invention is the washing machine according to the fifth aspect, wherein the pumping blade side region communicates with the pumping path in the washing tub.

  A seventh aspect of the present invention is the washing machine according to the fifth or sixth aspect, wherein the pumping blade extends linearly along a radial direction with respect to the rotation center of the first blade. It is.

According to the first aspect of the present invention, in the washing machine, the first wing for feeding the washing liquid in the washing tub to the pumping path is directly connected to the output shaft of the motor, and stirs the laundry in the washing tub. The second wing is connected to the first wing via a speed reduction mechanism. In this case, the driving force of the motor is transmitted in the order of the first blade, the speed reduction mechanism, and the second blade. That is, the driving force of the motor is directly transmitted to the first blade.
In this way, you want to drive at high speed and low torque (on the high speed and low torque side) and connect the first blade directly to the output shaft of the motor, and drive at low speed and high torque (on the low speed and high torque side). The second blade is connected to the output shaft of the motor via the speed reduction mechanism and is driven via the speed reduction mechanism. Therefore, the pumping effect can be improved by using a smaller and lighter motor while reducing the size and weight of the motor.

According to the invention described in claim 2, the speed reduction mechanism is constituted by the sun gear fixed to the first wing, the plurality of planetary gears supported by the second wing, and the outer ring gear fixed to the washing tub. be able to. With this configuration, the second wing can be rotated in the same direction as the first wing at a lower speed than the first wing.
According to the third aspect of the present invention, the first wing is located on the bottom side of the washing tub, so that the washing liquid at the bottom of the washing tub can be efficiently fed into the pumping path. Can be further improved.

According to the fourth aspect of the invention, the first wing is disposed between the first bottom wall and the second bottom wall, thereby corresponding to the space between the first bottom wall and the second bottom wall. The size can be increased to the size. Since the 1st wing | blade can send the washing | cleaning liquid of the bottom part of a washing tub to a pumping path more efficiently by the part which enlarges, the further improvement of a pumping effect can be aimed at.
According to the fifth aspect of the present invention, in the first wing, the plurality of pumping blades can efficiently send the washing liquid at the bottom of the washing tub to the pumping channel as the first wing rotates.

According to the sixth aspect of the present invention, the pumping blade of the first wing is adjacent to the inlet of the pumping channel, so that the washing liquid at the bottom of the washing tub is more efficiently discharged as the first wing rotates. Can be sent to the pumping channel.
According to the seventh aspect of the present invention, the pumping blade extending in a straight line efficiently draws the washing liquid at the bottom of the washing tub regardless of whether the first blade rotates in the forward direction or the reverse direction. Can be sent to the pumping channel.

FIG. 1 is a schematic cross-sectional view of the internal structure of a washing machine 1 according to an embodiment of the present invention. FIG. 2 is an enlarged view of a main part of FIG. FIG. 3 is a schematic exploded perspective view of the main part shown in FIG. FIG. 4 is a bottom view of the pumping blade 5. 5 is a cross-sectional view taken along the line AA in FIG. FIG. 6 is a diagram in which a modification is applied to FIG.

Embodiments of the present invention will be specifically described below with reference to the drawings.
FIG. 1 is a schematic cross-sectional view of the internal structure of a washing machine 1 according to an embodiment of the present invention. FIG. 2 is an enlarged view of a main part of FIG. FIG. 3 is a schematic exploded perspective view of the main part shown in FIG.
In addition, when mentioning the direction of the washing machine 1, the attitude | position of the washing machine 1 in FIG. 1 is made into a reference | standard. That is, the vertical direction in FIG. 1 is the vertical (vertical) direction of the washing machine 1, and the horizontal direction in FIG. 1 is the horizontal (horizontal) direction of the washing machine 1. Further, the case of viewing from above is referred to as “plan view”, and the case of viewing from below is referred to as “bottom view”.

The washing machine 1 mainly includes a water tub 2, a washing tub 3, a motor 4, a pumping wing 5 as a first wing, and a rotary wing 6 as a second wing in a casing (not shown). Is included.
The water tank 2 is a so-called outer tank and is fixed to the housing. The water tank 2 has a cylindrical shape extending in the vertical direction. The aquarium 2 integrally has a cylindrical side wall 7 extending in the up-down direction and a bottom wall 8 extending flat in the left-right direction and closing the lower end of the side wall 7. The upper end of the water tank 2 is an opening 9 defined by the upper edge of the side wall 7 to expose the inside of the water tank 2 upward. A round through hole 30 is formed at the circular center position of the bottom wall 8.

  The washing tub 3 is a so-called inner tub. The washing tub 3 has a cylindrical shape extending in the vertical direction and is slightly smaller than the water tub 2. The laundry is stored in the washing tub 3. The washing tub 3 integrally includes a cylindrical side wall 10 that extends vertically and a bottom wall 11 that extends flatly to the left and right and closes the lower end of the side wall 10. In the washing tub 3, the bottom wall 11 and the lower end of the side wall 10 to which the bottom wall 11 is connected constitute the bottom 12 of the washing tub 3. The upper end of the washing tub 3 is an opening 13 defined by the upper edge of the side wall 10, and the inside of the washing tub 3 is exposed upward.

The washing tub 3 is accommodated in the water tub 2 and is substantially coaxial with the water tub 2. Hereinafter, the central axis of each of the water tub 2 and the washing tub 3 is defined as a common central axis 28.
The opening 13 of the washing tub 3 communicates with the opening 9 of the water tub 2 from below. The communicating openings 9 and 13 constitute a laundry entrance / exit 14. The laundry is put into and out of the washing tub 3 through the entrance 14.

The bottom wall 11 (bottom portion 12) of the washing tub 3 includes a first bottom wall 15 on the upper side (opening 13 side) and a second bottom wall 16 on the lower side (side farther from the opening 13 than the first bottom wall 15). Is a double structure. A predetermined space 100 is secured between the first bottom wall 15 and the second bottom wall 16.
The first bottom wall 15 has a plate shape that extends horizontally from side to side, and is connected to the lower end of the side wall 10 of the washing tub 3. The first bottom wall 15 has a portion that is not connected to the bottom wall 11 of the washing tub 3 (left end portion in FIG. 1), and a cover 17 that extends vertically is connected to this portion. The cover 17 has, for example, a groove shape having a substantially U-shaped flat cross section. The cover 17 is connected to the nearest portion of the side wall 10 in a state of being opposed from the inside of the washing tub 3, and extends upward along the side wall 10. The cover 17 and the nearest part of the side wall 10 (the part facing the cover 17) are integrated to form a tubular pumping path 18. That is, the pumping path 18 is provided in the washing tub 3 as a part of the washing machine 1. The pumping path 18 extends upward along the side wall 10 to the near side of the opening 13. An intake port 19 that communicates from the side with respect to the space 100 between the first bottom wall 15 and the second bottom wall 16 is provided at the lower end of the pumping path 18. A spout 20 that communicates with the inside of the washing tub 3 is provided at the upper end of the pumping path 18.

  Referring to FIG. 2, in the first bottom wall 15, a portion inside the outer peripheral edge in a plan view is recessed one step downward, whereby a shallow concave portion 21 is formed on the upper surface of the first bottom wall 15. Is formed. The recess 21 has a circular shape that is coaxial with the cylindrical side wall 10 in plan view. In the recess 21, a round insertion hole 22 is formed at a position coinciding with the circle center of the side wall 10, and a plurality of through holes 23 are formed at positions avoiding the insertion hole 22. Each of the insertion hole 22 and the through hole 23 penetrates the first bottom wall 15 in the recess 21 in the thickness direction (vertical direction) of the first bottom wall 15. A number of gear teeth 24 extending in the vertical direction are formed on the entire area of the circumferential portion that borders the insertion hole 22 in the first bottom wall 15. A portion of the first bottom wall 15 where the gear teeth 24 are formed constitutes an outer ring gear 25. Since the outer ring gear 25 is integrally formed with the first bottom wall 15, it is fixed to the first bottom wall 15 (in other words, the washing tub 3). In the first bottom wall 15, as shown in FIG. 2, the outer ring gear 25 may be thicker (thick in the vertical direction) than other portions.

  The second bottom wall 16 has a disk shape that is coaxial with the side wall 10 of the washing tub 3. In the second bottom wall 16, a round insertion hole 26 is formed at a circular center position, and a plurality of through holes 27 are formed at positions avoiding the insertion hole 26. Each of the insertion hole 26 and the through hole 27 penetrates the second bottom wall 16 in the thickness direction (vertical direction) of the second bottom wall 16. The insertion hole 26 of the second bottom wall 16, the insertion hole 22 of the first bottom wall 15, and the through hole 30 of the bottom wall 8 of the water tub 2 are on the common central axis 28 of the water tub 2 and the washing tub 3. They are lined up coaxially.

  The motor 4 is a motor that generates a driving force by being electrically driven. As the motor 4 of this embodiment, a so-called DD (direct drive) type motor is used. The motor 4 is disposed below the bottom wall 8 of the water tank 2. The motor 4 has an output shaft 29 for outputting a driving force. The output shaft 29 extends upward from the motor 4. The output shaft 29 includes a root portion 38 on the motor 4 side, and a first shaft 31 and a second shaft 32 that are further away from the motor 4 than the root portion 38, and the root portion 38 to the first shaft 31. Branches to the second shaft 32.

The second shaft 32 has a tubular shape, and the outer peripheral surface and the inner peripheral surface thereof are expanded or contracted at a plurality of positions in the axial direction. A flange 33 projecting radially outward from the outer peripheral surface of the second shaft 32 is integrally formed slightly below the upper end of the second shaft 32.
The second shaft 32 is inserted from below into the through hole 30 of the bottom wall 8 of the water tank 2. An annular bearing 34 is interposed between the portion of the bottom wall 8 that borders the through hole 30 and the second shaft 32, and the second shaft 32 can be rotated by the bottom wall 8 (water tank 2). It is supported. In addition, the upper end of the second shaft 32 is fitted from below into the insertion hole 26 of the second bottom wall 16 of the washing tub 3, and the flange 33 surrounds the insertion hole 26 to the second bottom wall 16. On the other hand, it is fixed from below. Thus, the second shaft 32 is connected to the washing tub 3, and the washing tub 3 is rotatably supported by the bottom wall 8 of the water tub 2.

  The first shaft 31 is cylindrical (may be hollow or solid), extends in the vertical direction, and is coaxially inserted into a hollow portion of the annular second shaft 32. The upper end portion of the first shaft 31 protrudes upward from the hollow portion of the second shaft 32 and is inserted into the insertion hole 22 of the first bottom wall 15. A large number of gear teeth 35 extending vertically are formed on the entire outer peripheral surface of the upper end portion of the first shaft 31 (see also FIG. 3). These gear teeth 35 constitute a male serration 36. An annular bearing 37 is interposed between the first shaft 31 and the inner peripheral surface of the upper end portion of the second shaft 32, and the first shaft 31 is rotatably supported by the second shaft 32. ing. Therefore, the first shaft 31 and the second shaft 32 can rotate relative to each other.

  In the output shaft 29, a common clutch mechanism 39 is interposed between the root portion 38 and the lower ends of the first shaft 31 and the second shaft 32. A known structure can be used as the clutch mechanism 39. The clutch mechanism 39 can transmit or interrupt the driving force of the motor 4 to each of the first shaft 31 and the second shaft 32. In relation to the clutch mechanism 39, a brake mechanism that stops one of the first shaft 31 and the second shaft 32 and a torque motor that operates the brake mechanism are related to the clutch mechanism 39. May be provided.

  Here, in the 2nd axis | shaft 32 below the bottom wall 8 of the water tank 2, the reduction device 40 as a 2nd reduction mechanism is incorporated in the inner side space of the part to which the internal peripheral surface expanded. A known configuration can be used as the reduction gear 40. The speed reduction device 40 decelerates the driving force of the motor 4 transmitted from the base portion 38 side by the clutch mechanism 39 on the output shaft 29 and outputs it from one or both of the first shaft 31 and the second shaft 32. Can do. Between the first shaft 31 and the second shaft 32, two seals 41 are provided to close the gap between the first shaft 31 and the second shaft 32 at two positions sandwiching the reduction gear 40 from above and below. It has been. This prevents foreign matter from entering the second shaft 32 and reaching the speed reduction device 40.

  A cover 42 is attached to the bottom wall 8 of the water tank 2 from below so as to cover a portion of the second shaft 32 in which the speed reduction device 40 is built. The cover 42 has a cup shape opened upward, and an insertion hole 43 through which the first shaft 31 and the second shaft 32 are inserted is formed at the bottom. An annular bearing 44 is interposed between a portion of the cover 42 that borders the insertion hole 43 and the outer peripheral surface of the second shaft 32, and the second shaft 32 is rotatably supported by the cover 42. ing. The clutch mechanism 39 is located outside (downward) from the cover 42.

Next, the pump blade 5 will be described. FIG. 4 is a bottom view of the pumping blade 5.
As shown in FIGS. 3 and 4, the pumping wing 5 has a disk shape that is thin in the vertical direction and has a circular shape in plan view. The pumping blade 5 is integrally provided with a lower boss 45, a pumping blade 46, an upper first boss 47, and an upper second boss 48.
Referring to FIG. 3, the lower boss 45 is a circular tube projecting downward from the lower surface 5 </ b> A of the pumping blade 5, and is coaxial with the pumping blade 5. Referring to FIG. 4, pumping blades 46 are convex ribs, and a plurality of (here, ten) are provided on lower surface 5 </ b> A of pumping wing 5. Each pumping blade 46 extends linearly from the outer peripheral surface of the lower boss 45 along the radial direction with the lower boss 45 (that is, the circle center of the pumping blade 5) as a reference. Therefore, the plurality of pumping blades 46 extends radially from the center of the pumping blade 5 as a whole. With reference to FIG. 3, the upper surface 5B of the pumping blade 5 is a flat surface. The upper first boss 47 has a hollow cylindrical shape that protrudes upward from the upper surface 5 </ b> B of the pumping blade 5, and is coaxial with the pumping blade 5. A large number of gear teeth 49 extending in the vertical direction are formed on the entire outer peripheral surface of the upper first boss 47. The portion of the upper first boss 47 where the gear teeth 49 are formed constitutes the sun gear 50. Since the upper first boss 47 on which the gear teeth 49 are formed is a part of the pumping blade 5, the sun gear 50 is fixed to the pumping blade 5.

  In addition, a large number of gear teeth 51 extending vertically are formed on the entire inner peripheral surface of the upper first boss 47. These gear teeth 51 constitute a female serration 52. The upper second boss 48 has a hollow cylindrical shape that protrudes upward from the upper surface of the upper first boss 47 and is coaxial with the pumping blade 5. The upper second boss 48 has a smaller diameter than the upper first boss 47. On the inner peripheral surface of the upper second boss 48, a spiral thread portion 53 is formed over substantially the entire region.

The hollow portions of the lower boss 45, the upper first boss 47, and the upper second boss 48 are arranged on the central axis of the pumping wing 5, and all communicate with each other.
Referring to FIG. 2, the pumping blade 5 (strictly speaking, the portion other than the upper first boss 47 and the upper second boss 48) is in contact with the first bottom wall 15 with each pumping blade 46 facing downward. It is arranged in the space 100 between the second bottom wall 16. That is, the pumping wing 5 is provided at the bottom 12 of the washing tub 3. In the pumping blade 5, the upper first boss 47 is fitted in the insertion hole 22 of the first bottom wall 15, and the upper second boss 48 protrudes upward from the insertion hole 22. In this state, the male serration 36 at the upper end portion of the first shaft 31 of the output shaft 29 of the motor 4 is inserted from below into the respective hollow portions of the lower boss 45 and the upper first boss 47, and the upper side. The first boss 47 is fitted to the female serration 52 on the inner peripheral surface (serration fitting). Thereby, the 1st axis | shaft 31 is connected with the pumping-up blade 5, and can rotate integrally with the pumping-up blade 5. FIG. Thus, the pumping blade 5 is directly connected to the first shaft 31 (the output shaft 29 of the motor 4).

In the washing tub 3, the region on the pumping blade 46 side (that is, the lower side) (the region on the pumping blade 46 side in the space 100 between the first bottom wall 15 and the second bottom wall 16) 64 is described above. The intake 19 of the pumping path 18 is connected from the side. That is, the area 64 and the pumping path 18 are in communication.
Next, the rotor blade 6 will be described. The rotary blade 6 is a so-called pulsator. Referring to FIG. 3, the rotor blade 6 has a disk shape that is thin in the vertical direction and has a circular shape in plan view. A boss 54, a stirring blade 55, and a carrier 56 are integrally provided on the rotary blade 6.

  The boss 54 has a hollow cylindrical shape that protrudes up and down from the rotor blade 6, and is coaxial with the rotor blade 6. On the upper end surface of the boss 54, a concave portion 57 is formed on the circular center side, which is recessed one step shallower than the outer peripheral side. A hollow portion of the boss 54 is located in the recess 57. A plurality of stirring blades 55 (here, six) are provided on the upper surface of the rotary blade 6. These stirring blades 55 extend radially around the boss 54. Each stirring blade 55 is raised in a streak shape.

The carrier 56 includes a plurality of (here, four) support bosses 58. Each support boss 58 has a shaft shape protruding downward from the rotor blade 6. Each support boss 58 is formed with a screw hole 59 extending upward from the lower end surface. These support bosses 58 are arranged at equal intervals along the circumferential direction of the rotary blade 6 at a position radially outside the boss 54.
Here, the washing machine 1 includes a speed reduction mechanism 60. The speed reduction mechanism 60 includes the outer ring gear 25 and the sun gear 50 described above and a plurality of planetary gears 61 (see also FIG. 5 described later). The planetary gears 61 are provided in the same number as the support bosses 58 (here, four). Each planetary gear 61 has a hollow cylindrical shape having a central axis extending in the vertical direction, and a large number of gear teeth 62 extending in the vertical direction are formed on the entire outer peripheral surface thereof. One of the support bosses 58 is inserted into the hollow portion of each planetary gear 61 from above, and a screw 66 is assembled to the screw hole 59 of each support boss 58 from below. Accordingly, each planetary gear 61 is rotatably supported by the support boss 58 of the rotor blade 6 in a state in which the planetary gear 61 cannot be detached from the support boss 58. The screw 66 is a part of the washing machine 1.

  Referring to FIG. 2, the rotor blade 6 is fitted from above into the recess 21 on the upper surface of the first bottom wall 15. A slight gap 67 is secured in the lateral direction between the rotor blade 6 in this state and the contour of the recess 21 in plan view. And in the rotary blade 6, the stirring blade 55 of the upper surface is exposed in the washing tub 3 from the bottom. That is, the rotary blade 6 is provided in the washing tub 3.

  Further, the upper second boss 48 of the pumping wing 5 is fitted into the hollow portion of the boss 54 of the rotor blade 6 with play from below. The set screw 63 is assembled to the screw portion 53 on the inner peripheral surface of the upper second boss 48 while being fitted into the recess 57 on the upper end surface of the boss 54 of the rotor blade 6. Thereby, the pumping blade 5 and the rotary blade 6 cannot be detached from each other in a state where the respective circle centers are coaxial. However, as described above, the upper second boss 48 of the pumping blade 5 is fitted with play in the hollow portion of the boss 54 of the rotor blade 6, and the set screw 63 is not in contact with the rotor blade 6. Therefore, although the pumping blade 5 and the rotary blade 6 cannot be detached, they can rotate relative to each other. The pumping wing 5 and the rotary wing 6 are rotatable about the respective circular centers that are coaxial. The set screw 63 described above is a part of the washing machine 1.

  Further, as described above, the pumping blade 5 is disposed between the first bottom wall 15 and the second bottom wall 16, and the rotor blade is disposed in the concave portion 21 (that is, on the first bottom wall 15) of the first bottom wall 15. 6 is arranged, it can be seen that the pumping blade 5 is provided at a position closer to the bottom 12 of the washing tub 3 than the rotating blade 6. It can also be seen that the first bottom wall 15 is on the rotor blade 6 side, and the second bottom wall 16 is further away from the rotor blade 6 than the first bottom wall 15. Furthermore, it can be seen that the lower surface 5A provided with a plurality of pumping blades 46 in the pumping blade 5 is a surface opposite to the rotor blade 6 side.

5 is a cross-sectional view taken along the line AA in FIG.
Referring to FIG. 5, in reduction mechanism 60, a plurality of planetary gears 61 surround sun gear 50 and mesh with sun gear 50 while being arranged at equal intervals in the circumferential direction (of sun gear 50). Further, the outer ring gear 25 is in mesh with each planetary gear 61 while surrounding all the planetary gears 61 that are in mesh with the sun gear 50. Therefore, the rotary blade 6 that supports the planetary gear 61 is connected to the pumping blade 5 having the sun gear 50 via the speed reduction mechanism 60 (the planetary gear 61 and the sun gear 50).

  Here, in the case of the washing operation or the rinsing operation, the washing liquid is supplied into the washing tub 3. The washing liquid is water mixed with a detergent in the case of a washing operation, and fresh water in the case of a rinsing operation. With reference to FIG. 2, the washing liquid supplied into the washing tub 3 accumulates at the bottom 12 of the washing tub 3. The washing liquid passes through the through hole 23 of the first bottom wall 15 of the washing tub 3, the space 100 between the first bottom wall 15 and the second bottom wall 16, and the first bottom wall 15 in the washing tub 3. You can go to and from the space above. The washing liquid can also go back and forth between the space 90 between the second bottom wall 16 and the bottom wall 8 and the space 100 through the through hole 27 of the bottom wall 8 of the water tank 2.

  When the motor 4 is driven during the washing operation or the rinsing operation, the driving force of the motor 4 is transmitted to the first shaft 31 to which the pumping blade 5 is directly connected at the output shaft 29 of the motor 4. The drive of the clutch mechanism 39 is controlled. Note that, in principle, the driving force is not transmitted to the second shaft 32 during the washing operation or the rinsing operation, so the washing tub 3 is not rotating.

  When the first shaft 31 receives the driving force of the motor 4, the pumping blade 5 (directly connected to the first shaft 31) rotates with the sun gear 50. At this time, the washing liquid accumulated in the bottom 12 of the washing tub 3 (particularly, the region 64 of the space 100 described above) is sent to the intake 19 of the pumping path 18 by the pumping blades 46 of the rotating pumping blades 5 (thick line). (See arrow X). With reference to FIG. 1, the washing liquid sent to the intake port 19 rises from the intake port 19 in the pumping path 18, is discharged from the jetting port 20 to the outside of the pumping path 18, and is returned to the washing tub 3. (See thick arrow Y). Thereby, since the washing liquid in the washing tub 3 can be circulated and repeatedly poured onto the laundry in the washing tub 3, the laundry can be efficiently washed and rinsed with a small amount of washing liquid.

Thus, the pumping path 18 is for pumping the washing liquid in the washing tub 3 from the bottom 12 of the washing tub 3 and returning it to the washing tub 3.
Here, referring to FIG. 5, since the outer ring gear 25 is fixed to the bottom 12 (first bottom wall 15) of the washing tub 3, all the planetary gears 61 are connected to the pumping blade 5 (sun gear 50). With the rotation, the sun gear 50 revolves around the sun gear 50 while meshing with the sun gear 50. The revolving direction of the planetary gear 61 is denoted by a reference sign Z (Zet). When all the planetary gears 61 revolve, the rotor blades 6 that support these planetary gears 61 rotate at a lower speed than the pumping blades 5 along the revolution direction Z of the planetary gears 61. With reference to FIG. 2, the stirring blade 55 of the rotating rotor blade 6 stirs the laundry in the washing tub 3. At this time, the pumping blade 5 and the rotary blade 6 are rotating in the same direction (the above-described revolution direction Z). That is, the speed reduction mechanism 60 rotates the rotary blade 6 at a lower speed than the pump blade 5 while rotating the pump blade 5 and the rotary blade 6 in the same direction.

In this manner, the pumping blade 5 receives the driving force of the motor 4 and rotates at a relatively high speed to send the washing liquid in the washing tub 3 from the bottom 12 to the pumping path 18. Further, the rotary blade 6 agitates the laundry in the washing tub 3 by receiving a rotational force of the pumping blade 5 and rotating at a relatively low speed.
As described above, in the washing machine 1, the pumping blade 5 that feeds the washing liquid in the washing tub 3 to the pumping path 18 is directly connected to the output shaft 29 of the motor 4, and stirs the laundry in the washing tub 3. The rotating blade 6 is connected to the pumping blade 5 through the speed reduction mechanism 60. In this case, the driving force of the motor 4 is transmitted in the order of the pumping blade 5, the speed reduction mechanism 60, and the rotating blade 6. That is, it is desired to drive the pumping blade 5 at high speed and low torque (on the high speed / low torque side) directly to the output shaft 29 of the motor 4 while driving at low speed / high torque (on the low speed / high torque side). The rotary blade 6 is connected to the output shaft 29 of the motor 4 via the speed reduction mechanism 60 and is driven via the speed reduction mechanism 60. Therefore, while reducing the size and weight of the motor 4, using the smaller and lighter motor 4, the pumping effect is improved, that is, the effect that the washing liquid is fed into the pumping path 18 by the pumping blades 5 and is raised in the pumping path 18. Can be improved.

In particular, the pumping blade 5 is located on the bottom 12 side of the washing tub 3, so that the washing liquid at the bottom 12 of the washing tub 3 can be efficiently fed into the pumping path 18. Improvements can be made.
Further, in the pumping blade 5, the plurality of pumping blades 46 can efficiently send the washing liquid in the bottom 12 of the washing tub 3 to the pumping channel 18 as the pumping blade 5 rotates. Here, since the pumping blade 46 of the pumping blade 5 is adjacent to the inlet (take-in port 19) of the pumping channel 18, the washing liquid at the bottom 12 of the washing tub 3 is further layered with the rotation of the pumping blade 5. It can be efficiently fed into the pumping path 18. Further, the pumping blades 46 (see FIG. 4) extending in a straight line form the pumping blades 5 in either the forward rotation direction (for example, clockwise in FIG. 4) or the reverse rotation direction (for example, counterclockwise in FIG. 4). The washing liquid at the bottom portion 12 of the washing tub 3 can be efficiently fed into the pumping path 18 even if it is rotated in the vertical direction. Incidentally, by controlling the rotation of the motor 4, the above-described revolution direction Z (see FIG. 5) can be switched to the normal rotation direction or the reverse rotation direction.

Further, by disposing the pumping blade 5 between the first bottom wall 15 and the second bottom wall 16, the pumping blade 5 is large up to a size corresponding to the space 100 between the first bottom wall 15 and the second bottom wall 16. Can be Since the pumping blade 5 can send the washing liquid at the bottom 12 of the washing tub 3 to the pumping path 18 more efficiently as much as the size of the pumping wing 5 increases, the pumping effect can be further improved.
In addition, if priority is not given to the enlargement of the pumping wing | blade 5, a structure as shown in FIG. 6 is also possible. Here, in FIG. 6, the same parts as those described in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.

  The first bottom wall 15 in FIG. 6 has a disk shape having a diameter about half that of the rotor blade 6, and an outer peripheral portion 15 </ b> A of the first bottom wall 15 is bent at a right angle and extends downward, and is above the second bottom wall 16. Connected from. Therefore, the entire first bottom wall 15 has a cup shape that is upside down, and is arranged away from the side wall 10 of the washing tub 3 inward in the radial direction. The intake port 19 of the pumping path 18 described above is formed in the outer peripheral portion 15A. In this case, the first bottom wall 15 is slightly smaller than the first bottom wall 15 described with reference to FIG. 2, and the pumping blade 5 is large enough to fit inside the cup-shaped first bottom wall 15. . In addition, the washing liquid passing through the intake 19 located far from the pumping path 18 (portion extending vertically) (on the right side in FIG. 6) bypasses the first bottom wall 15 and then pumps up the pumping path. 18 to flow up.

  In any of the above-described embodiments, in the washing machine 1, the pump 4 and the rotary blade 6 and the washing tub 3 are separated by the motor 4 by separate drive shafts (first shaft 31 and second shaft 32). Can be driven. That is, since not only the pumping blade 5 and the rotary blade 6 but also the washing tub 3 can be rotated by one motor 4, the cost and size of the washing machine 1 can be reduced.

For example, as described above, in the washing operation and the rinsing operation, the driving force of the motor 4 is transmitted only to the first shaft 31 to which the pumping blade 5 is directly connected in the output shaft 29 of the motor 4. The drive of the clutch mechanism 39 is controlled.
On the other hand, in the dehydrating operation, the driving of the clutch mechanism 39 is controlled so that the driving force of the motor 4 is transmitted only to the second shaft 32 of the output shaft 29, and only the washing tub 3 rotates (pumping blade 5). And the rotor blade 6 does not rotate). Then, the laundry in the washing tub 3 is dehydrated by the rotation of the washing tub 3 (high-speed rotation). Here, a fluid balancer 65 (see FIG. 1) for preventing vibration caused by rotation (especially dehydration rotation) of the washing tub 3 is attached to an end of the washing tub 3 on the opening 13 side. ing.

Thus, since the driving force of the motor 4 can be selectively transmitted to the first shaft 31 and the second shaft 32 by the clutch mechanism 39, the pumping blade 5, the rotary blade 6, and the washing tub. 3 can be rotated by an arbitrary driving pattern.
The present invention is not limited to the contents of the above embodiments, and various modifications can be made within the scope of the claims.

  For example, the motor 4 of the above-described embodiment is a DD type motor, and the output shaft 29 is directly connected coaxially to the washing tub 3 and the pumping wing 5. A drive motor may be used. In the case of belt driving, the output shaft 29 of the motor 4 is arranged laterally offset from the rotation center of the washing tub 3 and the pumping wing 5, and the respective rotating shaft and output shaft 29 of the washing tub 3 and the pumping wing 5 are arranged. Between the two, an endless belt (not shown) for driving force transmission is wound around. Even in this case, by considering the endless belt as a part of the output shaft 29, it can be said that the pumping blade 5 is directly connected to the output shaft 29 instead of the rotary blade 6. In the case of belt driving, there is an advantage that the motor 4 can be arranged in a dead space at a position shifted from the rotation center of the washing tub 3 in the casing of the washing machine 1 to effectively use the space in the casing. is there.

Moreover, the pumping blade 46 may not be provided over the entire range from the center of the pumping blade 5 (the lower boss 45) to the outer peripheral edge, and may be provided only in the outer peripheral portion, for example. Further, the vertical dimension (thickness) of the pumping blade 46 may not be constant over the entire range.
In the above-described embodiment, the vertical type in which the rotation center of the washing tub 3 extends up and down is shown. However, the washing tub 3 is arranged obliquely so that the rotation center extends with an inclination with respect to the vertical direction. May be.

DESCRIPTION OF SYMBOLS 1 Washing machine 3 Washing tub 4 Motor 5 Pumping wing 5A Lower surface 6 Rotating wing 12 Bottom 15 First bottom wall 16 Second bottom wall 18 Pumping path 25 Outer ring gear 29 Output shaft 46 Pumping blade 50 Sun gear 60 Reduction mechanism 61 Planetary gear 64 region

The invention according to claim 1 is provided in the washing tub for storing the laundry and the washing tub, for pumping the washing liquid in the washing tub from the bottom of the washing tub and returning it to the washing tub. A pumping path, a motor having an output shaft for outputting a driving force, and provided at the bottom of the washing tub, directly connected to the output shaft of the motor and receiving a driving force of the motor to relatively high speed a pumping blade feeding into the pumping channel the washing liquid in the washing tub from the bottom by rotating, provided in the washing tub, by relatively low speed by receiving the rotational force of the pre-Symbol pumping vanes A rotating blade that stirs the laundry in the washing tub, and is interposed between the pumping blade and the rotating blade in the order of transmission of the driving force of the motor, and rotates the rotating blade at a lower speed than the pumping blade. be characterized in that it comprises a speed reduction mechanism, the , It is a washing machine.

According to a second aspect of the invention, the reduction mechanism, the revolution and the sun gear fixed to said pumping vanes, around the sun gear while meshing with the sun gear be supported rotatably by the rotary blade 2. A plurality of possible planetary gears and an outer ring gear fixed to the washing tub and meshing with the plurality of planetary gears, wherein the rotary blades are rotated in the same direction as the pumping blades. It is a washing machine of description.

The invention according to claim 3 is the washing machine according to claim 2, wherein the pumping blade is provided at a position closer to the bottom of the washing tub than the rotary blade.
According to a fourth aspect of the present invention, the bottom portion of the washing tub has a double structure including a first bottom wall on the rotor blade side and a second bottom wall that is farther from the rotor blade than the first bottom wall. The pumping blade is disposed between the first bottom wall and the second bottom wall, and the outer ring gear is fixed to the first bottom wall. It is a washing machine of description.

According to a fifth aspect of the invention, wherein the said rotary blade side in pumping vanes on the opposite side, and a plurality of pumping vanes extending radially from the center of rotation of said pumping vanes are provided, wherein Item 5. A washing machine according to Item 3 or 4.
A sixth aspect of the present invention is the washing machine according to the fifth aspect, wherein the pumping blade side region communicates with the pumping path in the washing tub.

The invention according to claim 7 is the washing machine according to claim 5 or 6, characterized in that the pumping blades extend linearly along a radial direction with a rotation center of the pumping blade as a reference. is there.

According to the first aspect of the present invention, in the washing machine, the pumping blade that feeds the washing liquid in the washing tub to the pumping path is directly connected to the output shaft of the motor, and rotates to stir the laundry in the washing tub. The wing is connected to the pumped wing through a speed reduction mechanism. In this case, the driving force of the motor is transmitted in the order of the pumping blade, the speed reduction mechanism, and the rotating blade. That is, the driving force of the motor is directly transmitted to the pumping blade.
As you can see, the high speed / low torque side (high speed / low torque side) pumping blade is connected directly to the motor output shaft while the low speed / high torque side (low speed / high torque side) rotation is desired. The blade is connected to the output shaft of the motor via the speed reduction mechanism and is driven via the speed reduction mechanism. Therefore, the pumping effect can be improved by using a smaller and lighter motor while reducing the size and weight of the motor.

According to invention of Claim 2, a speed-reduction mechanism can be comprised by the sun gear fixed to the pumping blade, the several planetary gear supported by the rotary blade, and the outer ring | wheel gear fixed to the washing tub. it can. With this configuration, the rotor blades, slower than pumping vanes can be rotated to pumping blades in the same direction.
According to the third aspect of the present invention, the pumping blade is located on the bottom side of the washing tub, so that the washing liquid at the bottom of the washing tub can be efficiently fed into the pumping path, and the pumping effect is increased accordingly. Further improvement can be achieved.

According to the invention described in claim 4, by arranging the pumping blade between the first bottom wall and the second bottom wall, the size corresponding to the space between the first bottom wall and the second bottom wall. The size can be increased. Since the pumping blade can feed the washing liquid at the bottom of the washing tub to the pumping path more efficiently as much as the size of the pumping blade increases, the pumping effect can be further improved.
According to the fifth aspect of the present invention, in the pumping blade, the plurality of pumping blades can efficiently send the washing liquid at the bottom of the washing tub to the pumping channel as the pumping blade rotates.

According to the invention described in claim 6, since the pumping blade of the pumping blade is adjacent to the inlet of the pumping channel, the washing liquid at the bottom of the washing tub is more efficiently pumped along with the rotation of the pumping blade. Can be sent to.
According to the seventh aspect of the present invention, the linearly extending pumping blade efficiently pumps the washing liquid at the bottom of the washing tub regardless of whether the pumping blade rotates in the forward direction or the reverse direction. Can be sent to the road.

The motor 4 is a motor that generates a driving force by being electrically driven. As the motor 4 of this embodiment, a so-called DD (direct drive) type motor is used. The motor 4 is disposed below the bottom wall 8 of the water tank 2. The motor 4 has an output shaft 29 for outputting a driving force. The output shaft 29 extends upward from the motor 4. The output shaft 29 includes a root portion 38 on the motor 4 side, a first shaft 31 (for example, corresponding to the output shaft of the motor in claim 1) and a second shaft 32 that are spaced apart from the motor 4 above the root portion 38. Branching from the root portion 38 to the first shaft 31 and the second shaft 32.

The carrier 56 includes a plurality of (here, four) support bosses 58. Each support boss 58 has a shaft shape protruding downward from the rotor blade 6. Each support boss 58 is formed with a screw hole 59 extending upward from the lower end surface. These support bosses 58 are arranged at equal intervals along the circumferential direction of the rotary blade 6 at a position radially outside the boss 54.
Here, the washing machine 1 includes a speed reduction mechanism 60 (e.g., corresponding to the speed reduction mechanism in claim 1) . The speed reduction mechanism 60 includes the outer ring gear 25 and the sun gear 50 described above and a plurality of planetary gears 61 (see also FIG. 5 described later). The planetary gears 61 are provided in the same number as the support bosses 58 (here, four). Each planetary gear 61 has a hollow cylindrical shape having a central axis extending in the vertical direction, and a large number of gear teeth 62 extending in the vertical direction are formed on the entire outer peripheral surface thereof. One of the support bosses 58 is inserted into the hollow portion of each planetary gear 61 from above, and a screw 66 is assembled to the screw hole 59 of each support boss 58 from below. Accordingly, each planetary gear 61 is rotatably supported by the support boss 58 of the rotor blade 6 in a state in which the planetary gear 61 cannot be detached from the support boss 58. The screw 66 is a part of the washing machine 1.

Claims (7)

A laundry tub for storing laundry;
A pumping path provided in the washing tub, for pumping the washing liquid in the washing tub from the bottom of the washing tub and returning it to the washing tub;
A motor having an output shaft for outputting a driving force;
The washing tub is provided at the bottom of the washing tub and is directly connected to the output shaft of the motor, and rotates at a relatively high speed under the driving force of the motor, so that the washing liquid in the washing tub is discharged from the bottom to the pumping path. A first wing that feeds into
The laundry is provided in the washing tub and connected to the first wing through a speed reduction mechanism, and the laundry in the washing tub is stirred by rotating at a relatively low speed under the rotational force of the first wing. A second wing that
A washing machine comprising:   The speed reduction mechanism includes a sun gear fixed to the first wing and a plurality of planetary gears revolved around the sun gear while being rotatably supported by the second wing and meshing with the sun gear. The washing machine according to claim 1, further comprising an outer ring gear fixed to the washing tub and meshing with the plurality of planetary gears, wherein the second wing is rotated in the same direction as the first wing. .   The washing machine according to claim 2, wherein the first wing is provided at a position closer to the bottom of the washing tub than the second wing. The bottom of the washing tub has a double structure including a first bottom wall on the second wing side and a second bottom wall that is further away from the second wing than the first bottom wall;
The first wing is disposed between the first bottom wall and the second bottom wall, and the outer ring gear is fixed to the first bottom wall. The washing machine described.   5. The plurality of pumping blades extending radially from the rotation center of the first blade are provided on the surface of the first blade opposite to the second blade side. 6. Washing machine.   The washing machine according to claim 5, wherein an area on the pumping blade side and the pumping path communicate with each other in the washing tub.   The washing machine according to claim 5 or 6, wherein the pumping blades extend linearly along a radial direction with a rotation center of the first blade as a reference.

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