WO2019080825A1

WO2019080825A1 - Drum washing machine

Info

Publication number: WO2019080825A1
Application number: PCT/CN2018/111342
Authority: WO
Inventors: 竹内晴美; 广濑聪司
Original assignee: 青岛海尔洗衣机有限公司; Aqua株式会社
Priority date: 2017-10-26
Filing date: 2018-10-23
Publication date: 2019-05-02
Also published as: JP2019076555A; CN111356801A; JP7104931B2; CN111356801B

Abstract

Provided is a drum washing machine capable of preventing an increase in size and cost in a case where a structure in which a drum and a rotating body can rotate in opposite rotation directions is employed. The drum washing machine comprises: an outer cylinder (20) arranged in a housing; a drum (22) arranged in the outer cylinder (20) and rotatable about a tilting axis inclined with respect to a horizontal direction; a rotary wing (24) arranged at a rear portion of the drum (22), wherein a surface of the rotary wing (24) is provided with a protrusion (24a) in contact with the laundry; a drive motor (100) for rotating the drum (22) and the rotary wing (24); and a transmission mechanism portion (T) that transmits the rotation of the drive motor (100) to the drum (22) and the rotary wing (24) such that the drum (22) and the rotary wing (24) rotate in opposite rotational directions.

Description

Drum washing machine

Technical field

The present invention relates to a drum washing machine. The drum washing machine can be continuously performed from washing to drying, or can be washed without drying.

Background technique

Conventionally, a drum washing machine rotates a drum of a horizontal axis type in an outer cylinder in which water is stored at the bottom, lifts the laundry by a lifting rib provided in the drum, and then drops the laundry onto the inner circumferential surface of the drum. The laundry is thus washed.

In the structure in which the laundry is stirred by the lifting ribs like this, the laundry is less entangled or rubbed with each other. Therefore, the drum washing machine is less likely to have a smaller mechanical force acting on the laundry than the fully automatic washing machine that rotates the pulsator in the washing and dewatering tub to wash the laundry, and the washing ability is likely to be low.

Therefore, in the drum washing machine, it is possible to adopt a configuration in which a rotating body having a projecting portion on the surface is provided at the end portion of the drum, and the drum and the rotating body are rotated in opposite rotational directions during washing and rinsing. By rotating the drum and the rotating body in the opposite rotational directions, the laundry is likely to be twisted, thereby imparting a washing effect to the laundry and improving the washing ability of the laundry.

The drive unit for rotating the drum and the rotator in the opposite rotation direction is provided with, for example, a drive motor for the drum and a drive motor for the rotator, and transmits the rotation of the drive motor for the drum to the rotary shaft of the drum. In the rotation of the drum, the rotation of the drive motor for the rotary body is transmitted to the rotary shaft of the rotary body to rotate the rotary body (see Patent Document 1).

However, as described above, in the case of employing a structure in which the drum and the rotating body are rotated by different driving motors, the arrangement space of the two driving motors is required, and the size of the apparatus main body is easily increased. In addition, the cost of the two drive motors is costed, which tends to cause an increase in the cost of the product.

Prior art literature

Patent literature

Patent Document 1: Japanese Patent Publication No. 03-104684

Summary of the invention

Problems to be solved by the invention

The present invention has been made in view of the above problems, and an object of the invention is to provide a drum washing machine capable of suppressing an increase in size and an increase in cost when a structure in which a drum and a rotating body are rotatable in opposite rotation directions is employed.

Solution to solve the problem

A drum washing machine according to a main aspect of the present invention includes: an outer cylinder disposed in the casing; a drum disposed in the outer cylinder and rotatable about a horizontal axis or an inclined axis inclined with respect to a horizontal direction; Disposed on a rear portion of the drum, the surface having a protrusion contacting the laundry; a driving motor for rotating the drum and the rotating body; and a transmission mechanism portion for transmitting the rotation of the driving motor to The drum and the rotating body rotate the drum and the rotating body in opposite rotational directions.

According to the above configuration, the rotation of the drive motor can be transmitted to the drum and the rotating body so that the drum and the rotating body rotate in opposite rotational directions by the transmission mechanism portion, and therefore, one drive is provided for the rotational driving of the drum and the rotary wing. The motor can be. Thereby, the arrangement space of the two drive motors is not required, and the cost of the two drive motors is not required, and the increase in size and the increase in cost can be suppressed.

In the drum washing machine of the present aspect, the transmission mechanism unit may include: a first rotating shaft fixed to the rotating body; a second rotating shaft fixed to the drum; and a planetary gear mechanism, the planet The gear mechanism includes: a sun gear, an annular ring gear surrounding the sun gear, a plurality of planet gears meshing with the sun gear and the ring gear, and a planet carrier rotatably holding the planet wheels, In the planetary gear mechanism, one of the carrier and the ring gear is an output portion and the other is a fixed portion, the sun gear is coupled to the first rotating shaft, and the output portion is coupled to the second portion The rotating shaft rotates in a reverse direction with the sun gear via the planetary gear when the sun gear rotates while the fixing portion is fixed in a non-rotating state.

For example, in a case where the ring gear is set as the output portion, the planetary gear may be constituted by one gear that meshes with the sun gear and the ring gear. Further, for example, in a case where the carrier is set as the output portion, the planetary gears may be constituted by two gears that rotate in opposite directions and mesh with the sun gear and the ring gear.

According to the above configuration, the transmission mechanism portion for rotating the drum and the rotating body in the opposite rotational directions can be realized using the planetary gear mechanism.

In the case of the above configuration, the clutch mechanism portion and the control portion may be further provided, wherein the clutch mechanism portion switches the driving form of the drive motor between the first mode and the second mode, the first The driving form is a driving form in which the fixed portion is fixed so as not to rotate to rotate the drum and the rotating body in opposite rotation directions, and the second form is to pass the fixing portion and the sun gear The drive unit that rotates integrally to rotate the drum and the rotating body, the control unit controls the operation of the drive motor and the clutch mechanism unit.

According to such a configuration, by the switching by the clutch mechanism unit, not only the drum washing machine can rotate the drum and the rotating body in the opposite rotational direction, but also the drum washing machine can rotate the drum and the rotating body integrally.

Further, in the case where the above configuration is employed, the control unit may be configured to perform the following operation during the washing process and/or the rinsing process: the first operation, the driving motor is rotated in the first form, and Rotating the drum and rotating the rotating body in the opposite direction to rotate the drum in a manner of rolling the laundry; in the second operation, when the magnitude of the load applied to the rotating body in the first operation exceeds a predetermined value In the large hour, the driving motor is rotated by switching from the first mode to the second mode, and the drum is rotated to rotate the laundry so that the rotating body and the drum are integrally rotated.

According to such a configuration, in the first operation of rotating the drum and the rotating body in the opposite rotational directions, the washing effect by the washing of the laundry can be expected, and the cleaning ability can be expected to be improved. On the other hand, the first operation tends to cause entanglement of the laundry, but in the case where the rotating body is subjected to a large load in the first operation, the second operation in which the drum and the rotating body are integrally rotated is switched, and therefore, It is suppressed that the drive motor generates a large load, and it is not easy to cause the temperature rise and stall of the drive motor.

Further, in the case where the above configuration is employed, a configuration may be employed in which the control unit performs the second operation after performing the first operation in the washing process and/or the rinsing process, wherein the first operation is The first mode rotates the drive motor and rotates the drum in a manner of tumbling the laundry and reversely rotates the rotating body with the drum; the second operation is from the The first mode is switched to the second mode to rotate the drive motor, and to rotate the drum so that the laundry rotates integrally with the drum.

According to such a configuration, the other surface of the first operation in which the washing effect by the laundry is expected to be smashed is that the cloth entanglement of the laundry is likely to occur, but the washing is performed by the second operation performed after the first operation. The object is not twisted and moved, and it is easy to eliminate the entanglement. Therefore, the rinsing effect can be obtained while suppressing the temperature rise and the stall of the drive motor due to winding or the like.

Furthermore, when the above-described configuration is adopted, when the load amount of the laundry in the drum is equal to or greater than a predetermined amount, the control unit performs the first operation after the first operation. In the second operation, when the load amount of the laundry in the drum is less than a predetermined amount, only the first operation is performed without performing the second operation.

According to such a configuration, when the load of the laundry is small and the temperature of the drive motor caused by the winding or the like is likely to rise or block, the first operation is performed, and the washing effect of the laundry can be greatly exhibited.

Effect of the invention

According to the present invention, it is possible to provide a drum washing machine capable of suppressing an increase in size and an increase in cost in a case where a structure in which a drum and a rotating body are rotatable in opposite rotation directions is employed.

The effects and significance of the present invention will be further clarified by the description of the embodiments shown below. However, the following embodiments are merely illustrative of the embodiments of the present invention, and the present invention is not limited by the contents described in the following embodiments.

DRAWINGS

Fig. 1 is a side cross-sectional view showing the structure of a drum washing machine of an embodiment.

Fig. 2 is a cross-sectional view showing a configuration of a driving unit according to an embodiment.

3 is a cross-sectional view showing the configuration of a drive unit of the embodiment.

4 is a front view of a rotor showing a configuration of a rotor of a drive motor according to an embodiment.

Fig. 5 is a view showing a configuration of a planetary gear mechanism according to an embodiment;

Fig. 6 is an enlarged perspective view of a rear portion of the bearing unit of the embodiment.

(a), (b), and (c) of FIG. 7 are views showing a configuration of a clutch body according to an embodiment.

Fig. 8 is a block diagram showing the configuration of a drum washing machine according to an embodiment.

Fig. 9 is a flow chart showing the control operation of the control unit in the washing process and the rinsing process of the embodiment.

Fig. 10 is a flow chart showing the control operation of the control unit in the washing process and the rinsing process in the first modification.

FIG. 11 is a cross-sectional view showing a configuration of a drive unit according to a second modification.

FIG. 12 is a view showing a configuration of a planetary gear mechanism according to a second modification.

Description of the reference numerals

10: casing; 20: outer cylinder; 22: drum; 24: rotating wing (rotating body); 24a: protruding portion; 30: driving portion; 100: driving motor; 200: wing shaft (first rotating shaft); 300: drum shaft (second rotating shaft); 400: planetary gear mechanism; 410: sun gear; 420: ring gear; 430: planetary gear; 440: planet carrier; 600: clutch mechanism portion; 701: control portion; T: Delivery agency department.

Detailed ways

Hereinafter, a drum washing machine which does not have a drying function as an embodiment of the drum washing machine of the present invention will be described with reference to the drawings.

FIG. 1 is a side cross-sectional view showing a configuration of a drum washing machine 1 of the present embodiment.

The drum washing machine 1 is provided with a casing 10 that constitutes an appearance. The front surface 10a of the casing 10 is inclined from the center portion to the upper portion, and the laundry inlet 11 is formed on the inclined surface. The inlet 11 is covered by a door 12 that is freely openable and closable.

In the casing 10, the outer cylinder 20 is elastically supported by a plurality of dampers 21. The drum 22 is rotatably disposed in the outer cylinder 20. The outer cylinder 20 and the drum 22 are inclined in a horizontal direction with respect to the horizontal direction. Thereby, the drum 22 rotates centering on the inclination axis inclined with respect to the horizontal direction. The inclination angle of the outer cylinder 20 and the drum 22 can be set to about 10 to 20 degrees. The opening 20a of the front surface of the outer cylinder 20 and the opening 22a of the front surface of the drum 22 face the input port 11, and are closed by the door 12 together with the input port 11. A plurality of dehydration holes 22b are formed in the inner peripheral wall of the drum 22. Further, on the inner circumferential surface of the drum 22, the three lifting ribs 23 are disposed at substantially equal intervals in the circumferential direction.

A rotary blade 24 is rotatably disposed at a rear portion of the drum 22. The rotary wing 24 has an approximately disc shape. A plurality of projecting portions 24a radially extending from the center portion are formed on the surface of the rotor blade 24. The rotary wing 24 rotates coaxially with the drum 22. It should be noted that the rotor blade 24 corresponds to the rotating body of the present invention.

A drive unit 30 that generates torque for driving the drum 22 and the rotor blades 24 is disposed behind the outer cylinder 20. The driving unit 30 rotates the drum 22 and the rotary blades 24 at different rotational speeds in opposite rotational directions during the washing process and the rinsing process. Specifically, the driving unit 30 rotates the drum 22 such that the centrifugal force of the laundry applied to the drum 22 is smaller than the gravity, and causes the rotor 24 to rotate toward the drum 22 at a rotational speed faster than the rotational speed of the drum 22 . Rotation in the direction of rotation in the opposite direction of rotation. On the other hand, the driving unit 30 rotates the drum 22 and the rotary vane 24 integrally during the spin-drying process so that the centrifugal force of the laundry applied to the drum 22 is much larger than the rotational speed of gravity. The detailed structure of the drive unit 30 will be described later.

A drain port portion 20b is formed at the bottom of the outer cylinder 20. A drain valve 40 is provided in the drain port portion 20b. The drain valve 40 is connected to the drain hose 41. When the drain valve 40 is opened, the water stored in the outer cylinder 20 is discharged to the outside of the washing machine through the drain hose 41.

A detergent box 50 is disposed in the front upper portion of the casing 10. In the detergent box 50, the detergent container 50a which accommodates a detergent is accommodated so that it can extract freely from the front. The detergent box 50 is connected to a water supply valve 51 disposed at a rear upper portion in the casing 10 via a water supply hose 52. Further, the detergent box 50 is connected to the upper portion of the outer cylinder 20 through a water injection pipe 53. When the water supply valve 51 is opened, tap water is supplied from the faucet into the outer cylinder 20 through the water supply hose 52, the detergent box 50, and the water injection pipe 53. At this time, the detergent contained in the detergent container 50a is washed away by water and supplied into the outer cylinder 20.

Next, the configuration of the drive unit 30 will be described in detail.

2 and 3 are cross-sectional views showing the configuration of the drive unit 30 of the present embodiment. FIG. 2 shows a state in which the driving form of the driving unit 30 is switched to the two-axis driving mode, and FIG. 3 shows a state in which the driving form of the driving unit 30 is switched to the single-axis driving mode.

The drive unit 30 includes a drive motor 100, a wing shaft 200, a drum shaft 300, a planetary gear mechanism 400, a bearing unit 500, and a clutch mechanism unit 600. In the drive unit 30, the wing shaft 200, the drum shaft 300, and the planetary gear mechanism 400 serve as a transmission mechanism that transmits the rotation of the drive motor 100 to the drum 22 and the rotary vane 24 to rotate the drum 22 and the rotary vane 24 in opposite rotational directions. T functions. It should be noted that the wing shaft 200 corresponds to the first rotating shaft of the present invention, and the drum shaft 300 corresponds to the second rotating shaft of the present invention.

The drive motor 100 generates torque for driving the rotary wing 24 and the drum 22. The wing shaft 200 is rotated by the torque of the drive motor 100 and transmitted to the rotary wing 24. The planetary gear mechanism 400 transmits the rotation of the wing shaft 200, that is, the rotation of the rotor 110 of the drive motor 100, to the drum shaft 300. Further, the planetary gear mechanism 400 performs rotation transmission in a direction in which the rotation direction of the drum shaft 300 is opposite to the rotation direction of the blade shaft 200. The drum shaft 300 rotates in the opposite direction to the wing shaft 200 coaxially with the wing shaft 200 at a rotational speed that is decelerated by the planetary gear mechanism 400, and transmits the rotation to the drum 22. The bearing unit 500 rotatably supports the wing shaft 200 and the drum shaft 300. The clutch mechanism unit 600 switches the driving form of the driving unit 30 between the two-axis driving mode and the single-axis driving mode. The two-axis driving mode is such that the rotating blade 24, that is, the wing shaft 200 is equal to the rotational speed of the driving motor 100. The rotational speed rotates and the drum 22, that is, the drum shaft 300, rotates at a rotational speed that is decelerated by the planetary gear mechanism 400, and the blade shaft 200 rotates in the opposite direction. The uniaxial drive mode is such that the rotor blade 24 and the drum 22, that is, the wing shaft 200. The drum shaft 300 and the planetary gear mechanism 400 are driven in a form that rotates integrally with the rotational speed of the drive motor 100. It should be noted that the biaxial driving form corresponds to the first aspect of the present invention, and the uniaxial driving form corresponds to the second aspect of the present invention.

The drive motor 100 is an outer rotor type DC brushless motor including a rotor 110 and a stator 120. The rotor 110 is formed in a bottomed cylindrical shape, and a permanent magnet 111 is disposed on the inner circumferential surface thereof over the entire circumference.

FIG. 4 is a front view showing the rotor 110 of the configuration of the rotor 110 of the drive motor 100 according to the present embodiment.

As shown in FIG. 4, a circular boss portion 112 is formed at a central portion of the rotor 110. A boss hole 113 for fixing the wing shaft 200 is formed in the boss portion 112, and an annular engaged recess 114 is formed on the outer circumference of the boss hole 113. The outer peripheral portion of the engaged recessed portion 114 has the uneven portion 114a over the entire circumference.

Returning to FIGS. 2 and 3, the stator 120 has a winding 121 at the outer peripheral portion. When a drive current is supplied from the motor drive portion to be described later to the winding 121 of the stator 120, the rotor 110 rotates.

The drum shaft 300 has a hollow shape and encloses the wing shaft 200 and the planetary gear mechanism 400. The central portion of the drum shaft 300 is bulged outward, and the bulged portion serves as the accommodating portion 300a of the planetary gear mechanism 400.

The planetary gear mechanism 400 includes a sun gear 410, an annular ring gear 420 surrounding the sun gear 410, four planetary gears 430 interposed between the sun gear 410 and the ring gear 420, and rotatably holding the planetary gears 430 Planet carrier 440.

FIG. 5 is a view showing a configuration of the planetary gear mechanism 400 of the present embodiment. Fig. 5 is a cross-sectional view taken along line A-A' of Fig. 2, and for convenience of explanation, illustrations of configurations other than the wing shaft 200, the drum shaft 300, and the planetary gear mechanism 400 are omitted.

The sun gear 410 is formed of metal and is fixed to an intermediate portion of the wing shaft 200. The ring gear 420 is formed of a resin. As shown in FIG. 5, a key portion 421 extending in the front-rear direction is formed on a plurality of locations on the outer circumferential surface of the ring gear 420, and a key groove portion 301 corresponding to the key portion 421 is formed on the inner circumferential surface of the drum shaft 300. By engaging the key portion 421 with the key groove portion 301, the drum shaft 300 and the ring gear 420 are fixed in the circumferential direction. Each of the planet gears 430 is formed of a resin and meshes with the sun gear 410 and the ring gear 420.

The planet carrier 440 includes a front frame 441, a rear frame 442, four support shafts 443, and a frame shaft 444. The front frame 441 and the rear frame 442 have a disk shape and sandwich four planetary wheels 430 from both sides. Four support shafts 443 are stretched between the front frame 441 and the rear frame 442, and the planetary gears 430 are rotatably attached to the respective support shafts 443. The frame shaft 444 is integrally formed with the rear frame 442 and extends rearward from the rear surface of the rear frame 442. The frame shaft 444 is coaxial with the drum shaft 300, and the inside is formed to be hollow for the insertion of the wing shaft 200.

Referring back to FIGS. 2 and 3, in the bearing unit 500, a cylindrical bearing portion 510 is provided at the center portion. Inside the bearing portion 510, rolling

bearings

511 and 512 are provided at the front and rear portions, and a mechanical seal 513 is provided at the front end portion. The outer peripheral surface of the drum shaft 300 is received by the rolling

bearings

511 and 512, and smoothly rotates in the bearing portion 510. Further, water is prevented from entering between the bearing portion 510 and the drum shaft 300 by the mechanical seal 513.

Fig. 6 is an enlarged perspective view of the rear portion of the bearing unit 500 of the embodiment. As shown in FIG. 6, at the rear end portion of the bearing portion 510, a spline 514 is formed on the inner surface over the entire circumference.

In the bearing unit 500, a fixing flange portion 520 is formed around the bearing portion 510. A mounting boss 521 is formed at a lower end portion of the fixing flange portion 520.

The bearing unit 500 is fixed to the rear surface of the outer cylinder 20 by a fixing method such as screw fastening at the fixing flange portion 520. In a state where the driving unit 30 is attached to the outer tube 20, the wing shaft 200 and the drum shaft 300 face the inside of the outer tube 20. The drum 22 is fixed to the drum shaft 300, and the rotary wing 24 is fixed to the wing shaft 200. The rear end portion of the wing shaft 200 protrudes rearward from the frame shaft 444 and is fixed to the boss hole 113 of the rotor 110.

The clutch mechanism portion 600 includes a clutch body 610, a clutch spring 620, a clutch lever 630, a lever support portion 640, a clutch driving device 650, a relay bar 660, and a mounting plate 670.

(a), (b), and (c) of FIG. 7 are views showing a configuration of a clutch body 610 according to the present embodiment, and are a front view, a right side view, and a rear view of the clutch body 610, respectively.

As shown in (a), (b) and (c) of Fig. 7, the clutch body 610 has an approximately disk shape. At the front end portion of the clutch body 610, an annular spline 611 is formed on the outer peripheral surface. The spline 611 is formed to engage with the spline 514 of the bearing unit 500. Further, a flange portion 612 is formed on the outer circumferential surface of the clutch body 610 behind the spline 611. Further, in the clutch body 610, an annular engagement flange portion 613 is formed at the rear end portion. The engagement flange portion 613 has the same shape as the engaged recessed portion 114 of the rotor 110, and has an uneven portion 613a over the entire circumference of the outer peripheral portion. When the engagement flange portion 613 is inserted into the engaged recessed portion 114, the

uneven portions

613a and 114a are engaged with each other.

A frame shaft 444 is inserted into the shaft hole 614 of the clutch body 610. The spline 614a formed on the inner circumferential surface of the shaft hole 614 is engaged with the spline 444a formed on the outer circumferential surface of the frame shaft 444. Thereby, the clutch body 610 is allowed to move in the forward and backward directions with respect to the frame shaft 444, and the rotation in the circumferential direction is restricted.

In the clutch body 610, an annular receiving groove 615 is formed outside the shaft hole 614, and a clutch spring 620 is housed in the receiving groove 615. One end of the clutch spring 620 is in contact with the rear end portion of the bearing portion 510, and the other end is in contact with the bottom surface of the receiving groove 615.

Referring back to FIGS. 2 and 3, a pressing portion 631 is formed at the upper end portion of the clutch lever 630, and the pressing portion 631 is in contact with the rear surface of the flange portion 612 of the clutch body 610, and the flange portion 612 is forward. Push. The clutch lever 630 is rotatably supported by a support shaft 641 provided on the lever support portion 640. A mounting shaft 632 is formed at a lower end portion of the clutch lever 630.

The clutch driving device 650 is disposed below the clutch lever 630. The clutch driving device 650 includes a torque motor 651 and a disk-shaped cam 652 that rotates about a horizontal axis by the torque of the torque motor 651. On the upper surface of the cam 652, a cam shaft 653 is provided on the outer peripheral portion. The center of rotation of the cam 652 coincides with the center of the mounting shaft 632 of the clutch lever 630 in the front-rear direction.

The relay bar 660 extends in the up and down direction and connects the clutch lever 630 and the cam 652. The upper end portion of the relay bar 660 is fitted to the mounting shaft 632 of the clutch lever 630, and the lower end portion is fitted to the cam shaft 653 of the cam 652. In the relay bar 660, a spring 661 is integrally formed at an intermediate position. The spring 661 is a tension spring.

The rod support portion 640 and the clutch drive device 650 are fixed to the mounting plate 670 by a fixing method such as screw fastening. The mounting plate 670 is fixed to the mounting boss 521 of the bearing unit 500 by screws.

When the driving form of the driving unit 30 is switched from the single-axis driving mode to the two-axis driving mode, as shown in FIG. 2, the cam 652 is rotated by the torque motor 651 such that the cam shaft 653 is positioned at the lowest position. As the cam 652 rotates, the lower end portion of the clutch lever 630 is pulled downward by the relay bar 660. The clutch lever 630 rotates forward around the support shaft 641, and the pressing portion 631 presses the clutch body 610 forward. The clutch body 610 moves forward against the elastic force of the clutch spring 620, and the splines 611 of the clutch body 610 are engaged with the splines 514 of the bearing unit 500.

In the clutch body 610, when the cam shaft 653 is moved to a predetermined position in the middle, the spline 611 reaches a position where it engages with the spline 514. At this time, the spring 661 of the relay bar 660 is in a state of natural length. The clutch body 610 does not move beyond the engagement position, and therefore, when the cam shaft 653 is moved from the predetermined position to the lowest position, as shown in FIG. 2, the spring 661 is extended downward. Then, the clutch lever 630 is rotated forward by the spring 661, and therefore the pressing force is applied from the pressing portion 631 to the clutch body 610 at the engagement position. Thereby, the spline 611 and the spline 514 can be firmly engaged.

When the spline 611 is engaged with the spline 514, the rotation of the clutch body 610 with respect to the bearing unit 500 in the circumferential direction is restricted, and the rotation is impossible. Therefore, the frame shaft 444 of the planetary gear mechanism 400, that is, the carrier 440 is Fixed to a state that cannot be rotated. In such a state, when the rotor 110 rotates, the wing shaft 200 rotates at a rotational speed equal to the rotational speed of the rotor 110, and the rotary wing 24 coupled to the wing shaft 200 also rotates at a rotational speed equal to the rotational speed of the rotor 110. . With the rotation of the wing shaft 200, in the planetary gear mechanism 400, the sun gear 410 rotates. As described above, the carrier 440 is in a fixed state, and therefore, the planetary gear 430 rotates only with the rotation of the sun gear 410 and cannot revolve. The planetary gear 430 rotates in the opposite direction to the sun gear 410, and the ring gear 420 rotates in the opposite direction to the sun gear 410 (refer to FIG. 5). Thereby, the drum shaft 300 fixed to the ring gear 420 rotates at a rotational speed slower than the wing shaft 200 in a direction opposite to the wing shaft 200, and the drum 22 fixed to the drum shaft 300 rotates at a rotational speed slower than that of the rotary wing 24. The wings 24 rotate in opposite directions. In other words, the rotary wing 24 rotates in a direction opposite to the drum 22 at a rotational speed faster than the drum 22.

On the other hand, when the form of the drive unit 30 is switched from the biaxial drive mode to the single-axis drive mode, as shown in FIG. 3, the cam 652 is rotated by the torque motor 651 such that the cam shaft 653 is positioned at the top. When the cam 652 rotates and the cam shaft 653 moves upward, first, the spring 661 contracts. When the spring 661 returns to the natural length, the relay rod 660 moves upward as the cam shaft 653 moves, and the lower end portion of the clutch lever 630 is pushed by the relay rod 660 to move upward. The clutch lever 630 rotates rearward about the support shaft 641, and the pressing portion 631 is separated from the flange portion 612 of the clutch body 610. The clutch body 610 is moved rearward by the elastic force of the clutch spring 620, and the engagement flange portion 613 of the clutch body 610 is engaged with the engaged recessed portion 114 of the rotor 110.

When the engagement flange portion 613 is engaged with the engaged recessed portion 114, the rotation of the clutch body 610 with respect to the rotor 110 in the circumferential direction is restricted, and the clutch body 610 is in a state of being rotatable together with the rotor 110. In such a state, when the rotor 110 rotates, the wing shaft 200 and the clutch body 610 rotate at a rotational speed equal to the rotational speed of the rotor 110. At this time, in the planetary gear mechanism 400, the sun gear 410 and the carrier 440 rotate at a rotation speed equal to that of the rotor 110. Thereby, the ring gear 420 rotates at the same rotational speed as the sun gear 410 and the carrier 440, and the drum shaft 300 fixed to the ring gear 420 rotates at the same rotational speed as the rotor 110. That is, in the drive unit 30, the wing shaft 200, the planetary gear mechanism 400, and the drum shaft 300 rotate integrally. Thereby, the drum 22 rotates integrally with the rotary blade 24.

FIG. 8 is a block diagram showing the configuration of the drum washing machine 1 of the present embodiment.

The drum washing machine 1 further includes a control unit 701, a storage unit 702, an operation unit 703, a water level sensor 704, a current detecting unit 705, a motor driving unit 706, a water supply driving unit 707, a drain driving unit 708, and a clutch driving unit in addition to the above configuration. 709, and a door lock device 710.

The operation unit 703 includes a power button 703a, a start button 703b, and a mode selection button 703c. The power button 703a is a button for turning on and off the power of the drum washing machine 1. The start button 703b is a button for starting the operation. The mode selection button 703c is a button for selecting an arbitrary operation mode from among a plurality of operation modes of the washing operation. The operation unit 703 outputs an input signal corresponding to the button operated by the user to the control unit 701.

The water level sensor 704 detects the water level in the outer cylinder 20, and outputs a water level detection signal corresponding to the detected water level to the control unit 701.

The motor drive unit 706 supplies a drive current to the drive motor 100 based on a control signal from the control unit 701. The motor drive unit 706 includes a rotation sensor 706a that detects the rotational speed of the drive motor 100, an inverter circuit, and the like, so that the drive motor 100 adjusts the drive power so as to rotate at the target rotational speed set by the control unit 701.

The current detecting unit 705 detects a drive current supplied from the motor drive unit 706 to the drive motor 100, and outputs a detection signal corresponding to the magnitude of the drive current to the control unit 701.

The water supply drive unit 707 supplies a drive current to the water supply valve 51 based on a control signal from the control unit 701. The drain drive unit 708 supplies a drive current to the drain valve 40 based on a control signal from the control unit 701.

The clutch drive 650 includes a first detection sensor 654 and a second detection sensor 655. The first detecting sensor 654 detects that the driving form of the driving unit 30 is switched to the two-axis driving mode, and outputs a detection signal to the control unit 701. The second detecting sensor 655 detects that the driving form of the driving unit 30 is switched to the single-axis driving mode, and outputs a detection signal to the control unit 701. The clutch drive unit 709 supplies a drive current to the torque motor 651 based on a control signal output from the control unit 701 based on detection signals from the first detection sensor 654 and the second detection sensor 655.

The door lock device 710 locks and unlocks the door 12 based on a control signal from the control unit 701.

The storage unit 702 includes an EEPROM, a RAM, and the like. The storage unit 702 stores a program for executing a washing operation of various washing operation modes. Further, the storage unit 702 stores various parameters and various control flags for executing these programs.

The control unit 701 drives the motor drive unit 706, the water supply drive unit 707, the drain drive unit 708, and the clutch drive based on the programs stored in the storage unit 702 based on the respective signals from the operation unit 703, the water level sensor 704, and the current detection unit 705. The portion 709, the door lock device 710, and the like are controlled.

The drum washing machine 1 performs a washing operation in various operation modes based on the operation of the operation unit 703 by the user. In the washing operation, the washing process, the intermediate dehydration process, the rinsing process, and the final dehydration process are performed in order. It should be noted that depending on the operation mode, the intermediate dehydration process and the rinsing process may be performed twice or more.

During the washing process and the rinsing process, the driving form of the driving unit 30 is switched to the two-axis driving mode. Water is stored in the outer cylinder 20 until it reaches a predetermined water level at the lower edge of the inlet port 11, so that the laundry in the drum 22 is immersed in water. Then, in a state where the outer cylinder 20 stores water, the drive motor 100 repeats the forward rotation and the reverse rotation. Thereby, the drum 22 repeats the forward rotation and the reverse rotation. The rotary wing 24 rotates in the opposite direction to the drum 22, reverses when the drum 22 is rotated forward, and rotates forward when the drum 22 is reversed. At this time, the drum 22 is rotated by the centrifugal force of the laundry acting on the drum 22 to be smaller than the gravity, and the rotor 24 is rotated at a rotation speed faster than the rotation speed of the drum 22.

The laundry is sucked onto the inner circumferential surface of the drum 22 by lifting the laundry in the drum 22 by the lifting ribs 23 and then dropping it, that is, by tumbling. In addition to this, in the rear portion of the drum 22, the laundry comes into contact with the projecting portion 24a of the rotating rotor blade 24, and the laundry is either rubbed by the projecting portion 24a or agitated by the projecting portion 24a. Thereby, the laundry is washed or rinsed. In particular, since the rotation direction of the drum 22 and the rotary blade 24 is different, the laundry is easily twisted, and the washing effect of the laundry being expected to be squeezed can be expected.

As described above, in the washing and rinsing, not only the mechanical force generated by the rotation of the drum 22 but also the mechanical force generated by the rotary blade 24 is applied to the laundry, so that the cleaning ability can be expected to be improved. In the intermediate dehydration process and the final dehydration process, the drive form of the drive unit 30 is switched to the uniaxial drive mode. As the dehydration operation, the drive motor 100 rotates in one-way high speed, and the drum 22 and the rotary vane 24 integrally rotate with the centrifugal force acting on the laundry in the drum 22 much larger than the rotational speed of gravity. By the action of the centrifugal force, the laundry is pushed onto the inner peripheral surface of the drum 22 to be dehydrated.

As described above, since the drum 22 rotates integrally with the rotary blade 24 during dehydration, the laundry can be well dehydrated so that the laundry attached to the drum 22 is not stirred by the rotary blade 24.

FIG. 9 is a flowchart showing a control operation of the control unit 701 in the washing process and the rinsing process according to the present embodiment.

Hereinafter, the control operation of the control unit 701 of the washing process and the rinsing process will be described with reference to Fig. 9 .

When the washing process or the rinsing process is started, the control portion 701 supplies water into the inside of the cylinder 20 (S101). That is, the control unit 701 controls to open the water supply valve 51 to supply water into the outer cylinder 20, and when the water level in the outer cylinder 20 reaches the predetermined water level, close the water supply valve 51 and stop the supply of water into the outer cylinder 20.

When the water supply is completed, the control unit 701 switches the driving form of the driving unit 30 from the single-axis driving mode to the two-axis driving mode by the clutch mechanism unit 600 (S102). Then, as the reverse two-axis operation, the control unit 701 reverses the drive motor 100 after the forward rotation (S103). For example, the on-time of forward rotation and reverse rotation is set to about 10 seconds, and the off-time is set to about 1 second. Further, the drive motor 100 is rotated at a predetermined target rotational speed, for example, by rotating the drum 22 at 45 rpm and rotating the rotary blade 24 at 90 rpm. As described above, the drum 22 rotates at a rotational speed at which the centrifugal force acting on the laundry in the drum 22 is less than the gravity, and the rotary vane 24 rotates in a direction opposite to the drum 22 at a higher speed than the drum 22. It should be noted that the reverse two-axis operation corresponds to the first operation of the present invention.

The rotation speed of the drive motor 100 is detected by the rotation sensor 706a at the time of the forward rotation and the reverse rotation, and the control unit 701 determines whether or not the rotational speed of the drive motor 100 rises above the threshold value during forward rotation and reverse rotation based on the detection result. (S104). The threshold is a rotational speed that is lower than the target rotational speed, and is set, for example, to a rotational speed at which the drive motor 100 cannot be rotated when a load that is likely to cause a malfunction such as a stalling of the drive motor 100 is applied to the rotary blade 24.

In the case where the rotational speed of the drive motor 100 rises above the threshold value during forward rotation and reverse rotation (S104: YES), when the operation time set for washing or rinsing has not elapsed (S105: NO), the control unit 701 returns to S103, and the drive motor 100 is again rotated forward and reverse. Thereafter, the control unit 701 determines the rotational speed of the drive motor 100 in S104.

When the operation time has elapsed while the rotational speed of the drive motor 100 does not rise above the threshold (S105: YES), the control unit 701 ends the reverse biaxial operation, and opens the drain valve 40 to drain from the outer cylinder 20 ( S106). When the drainage is completed, the washing process or the rinsing process ends.

In the reverse two-axis operation, since the drum 22 and the rotary vane 24 rotate in opposite rotational directions, the washing effect by the washing of the laundry can be expected. On the other hand, it is easy to cause entanglement of the laundry, and it is easy to cause agglomeration of the entangled laundry. In the case where a large amount of laundry is put into the drum 22, a large laundry mass is easily generated, and when the large laundry mass is blocked between the door 12 and the rotary wing 24, it is easy to apply the rotary wing 24 The laundry produces a large load. In the case where a large load is applied to the rotary wing 24, the driving load of the drive motor 100 is increased. In particular, in the present embodiment, since the wing shaft 200 is directly coupled to the rotor 110 of the drive motor 100, unlike the structure in which the pulley is interposed, for example, the release of the force by the sliding of the pulley cannot be expected, and is applied to The load of the rotary wing 24 directly acts on the drive motor 100. Therefore, there is a hidden danger that the temperature rise of the drive motor 100 becomes large or the drive motor 100 is blocked.

When a large load exceeding a predetermined load is applied to the rotor blade 24 due to the entanglement of the laundry or the like, the rotational speed of the drive motor 100 during forward rotation and reverse rotation can be prevented from rising above the threshold value. Therefore, when it is determined in S104 that the rotational speed of the drive motor 100 has not risen to the threshold or more (S104: NO), the control unit 701 switches the drive mode of the drive unit 30 from the biaxial drive mode to the clutch mechanism unit 600. Single-axis drive mode (S107). Then, as a single-axis operation, the control unit 701 causes the drive motor 100 to rotate forward and then reverse (S108). For example, similarly to the reverse two-axis operation, the on-time of forward rotation and reverse rotation is set to about 10 seconds, and the off-time is set to about 1 second. Further, the drive motor 100 is rotated at a predetermined target rotational speed, for example, by rotating the drum 22 at 45 rpm and rotating the rotary blade 24 at 90 rpm. The drum 22 is rotated by a centrifugal force at which the centrifugal force acting on the laundry in the drum 22 is smaller than the gravity, and the rotary vane 24 rotates integrally with the drum 22. In the single-axis operation, the rotary vane 24 is in a state of being stationary with respect to the drum 22, and therefore, a large load is not applied to the rotary vane 24. Thereby, the temperature rise and the stall of the drive motor 100 are prevented from occurring. It should be noted that the single-axis operation corresponds to the second operation of the present invention.

Until the operation time has elapsed (S109: No), the control unit 701 repeats the forward rotation of the drive motor 100, and the rinsing by the tumbling of the laundry continues in the drum 22. When the operation time has elapsed (S109: YES), the control unit 701 ends the single-axis operation, and opens the drain valve 40 to drain water from the inside of the outer cylinder 20 (S106). When the drainage is completed, the washing process or the rinsing process ends.

According to the present embodiment, the rotation of the drive motor 100 can be transmitted to the drum 22 and the rotary wing 24 by the transmission mechanism portion T, so that the drum 22 and the rotary wing 24 are rotated in opposite rotational directions, and therefore, only the drum 22 and the rotary wing 24 are provided. The rotary drive is provided with a drive motor 100. Thereby, the arrangement space of the two drive motors is not required, and in addition, the cost of the two drive motors can be eliminated, and the increase in size and the increase in cost can be suppressed.

Further, according to the present embodiment, the transmission mechanism portion T for rotating the drum 22 and the rotary blade 24 in the opposite rotational directions can be realized using the planetary gear mechanism 400.

Further, according to the present embodiment, in the drum washing machine 1, not only the operation of rotating the drum 22 and the rotary blade 24 in the opposite rotational direction but also the rotation of the drum 22 can be performed by the switching by the clutch mechanism unit 600. The action of the wings 24 rotating integrally.

Further, according to the present embodiment, when a large load is applied to the rotary blade 24 in the reverse two-axis operation in which the drive motor 100 is rotated in the biaxial drive mode, the drive motor is switched to the single-axis drive mode. Since the 100-rotation single-axis operation is performed, a large load is generated on the drive motor 100, and the temperature rise and the stall of the drive motor 100 are less likely to occur. In addition, the development of the entanglement of the laundry is suppressed, and the cloth damage or the like can be prevented.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and the like, and the embodiments of the present invention can be variously modified.

FIG. 10 is a flowchart showing the control operation of the control unit 701 in the washing process and the rinsing process in the first modification.

Hereinafter, the control operation of the control unit 701 in the washing process and the rinsing process in the present modification will be described with reference to Fig. 10 .

When the washing process or the rinsing process is started, the control unit 701 performs water supply into the outer cylinder 20 (S201). When the water supply is completed, the control unit 701 determines whether or not the load amount of the laundry in the drum 22 is equal to or greater than a predetermined amount (S202). The determination of the load of the laundry is performed before the washing process. For example, in the uniaxial driving mode, the rotation of the drum 22 is accelerated until the rotational speed at which the laundry is attached to the inner surface of the drum 22 is reached, and in this state, the drive supplied to the drive motor 100 is detected by the current detecting portion 705. Current. The larger the load, the larger the load applied to the drive motor 100 when the drum 22 rotates, and the larger the drive current. The control unit 701 determines the amount of load based on the magnitude of the drive current. Of course, the control unit 701 can determine the amount of load by other known methods.

As described above, when the temperature of the drive motor 100 is increased due to the winding at the time of the reverse biaxial operation, and the load amount of the laundry that is blocked in the drum 22 is large, the load is small. It is not easy to produce in the case.

When the amount of load is less than the predetermined amount (S202: NO), the control unit 701 switches the drive mode of the drive unit 30 from the uniaxial drive mode to the two-axis drive mode by the clutch mechanism unit 600 (S203) until the operation time elapses. (S205: No), the forward rotation and the reverse rotation of the drive motor 100 are repeatedly repeated (S204). That is, the single-axis operation is not performed, and only the reverse two-axis operation is performed. Similarly to the reverse biaxial operation of the above-described embodiment, for example, the on-time of forward rotation and reverse rotation is set to about 10 seconds, and the off-time is set to about 1 second. Further, the target rotational speed of the drive motor 100 is set, for example, to a rotational speed at which the drum 22 is rotated at 45 rpm and the rotary wing 24 is rotated at 90 rpm.

When the operation time has elapsed (S205: YES), the control unit 701 ends the reverse biaxial operation, and opens the drain valve 40 to drain water from the inside of the outer cylinder 20 (S206). When the drainage is completed, the washing process or the rinsing process ends.

On the other hand, when the amount of load is equal to or greater than the predetermined amount (S202: YES), the control unit 701 first switches the driving form of the driving unit 30 from the uniaxial driving mode to the biaxial driving mode by the clutch mechanism unit 600 (S207). The forward rotation and the reverse rotation of the drive motor 100 are performed (S208). That is, the reverse two-axis operation is performed. However, the ON time of the forward rotation and the reverse rotation at this time is shorter than the ON time when the load amount is less than the predetermined amount, and is set to, for example, about 5 seconds.

When the forward rotation and the reverse rotation of the drive motor 100 are repeated only for the first time (for example, ten times) (S209: YES), the control unit 701 switches the drive mode of the drive unit 30 from the two-axis drive mode by the clutch mechanism unit 600. In the single-axis drive mode (S210), the forward rotation and the reverse rotation of the drive motor 100 are performed (S211). That is, the single-axis operation is performed. At this time, similarly to the single-axis operation of the above-described embodiment, for example, the ON time of the forward rotation and the reverse rotation is set to about 10 seconds, and the OFF time is set to about 1 second. Further, the target rotational speed of the drive motor 100 is set, for example, to a rotational speed at which the drum 22 is rotated at 45 rpm and the rotary wing 24 is rotated at 90 rpm.

When the forward rotation and the reverse rotation of the drive motor 100 are repeated only for the second number of times (for example, ten times) (S212: YES), if the operation time has not elapsed (S213: NO), the control portion 701 passes the clutch mechanism portion 600 again. The drive form of the drive unit 30 is switched from the single-axis drive mode to the two-axis drive mode (S207), and the drive motor 100 is rotated forward and reverse (S208).

In this way, the reverse two-axis operation and the single-axis operation are repeated until the operation time elapses. As described above, in the reverse biaxial operation, the rinsing effect by the washing of the laundry can be expected, but on the other hand, the entanglement of the laundry is likely to occur, but after the double shaft operation is continued The uniaxial operation allows the laundry to be moved without being twisted, and the entanglement is easily eliminated. That is, even if the reverse biaxial operation is repeated, the winding is not easily developed. Therefore, it is possible to obtain a rinsing effect while suppressing an increase in temperature and a stall of the drive motor 100 due to winding or the like.

When the operation time has elapsed (S213: YES), the control unit 701 ends the repetition of the reverse biaxial operation and the uniaxial operation, and opens the drain valve 40 to drain the water from the outer cylinder 20 (S206). When the drainage is completed, the washing process or the rinsing process ends.

According to the configuration of the present modification, when the load of the laundry is small and the temperature of the drive motor 100 is not easily increased or blocked due to winding or the like, the laundry can be greatly exhibited by performing only the reverse two-axis operation. The washing effect. In addition, when the load of the laundry is large and the temperature of the drive motor 100 is likely to increase or block due to winding or the like, the single-axis operation is performed after the reverse two-axis operation, and the drive motor 100 can be suppressed. The temperature rises and stops, and the washing effect is obtained.

FIG. 11 is a cross-sectional view showing a configuration of a drive unit 30 according to Modification 2. FIG. 12 is a view showing a configuration of a planetary gear mechanism 400 according to Modification 2. FIG. 12 is a cross-sectional view taken along line B-B' of FIG. 11, and for convenience of explanation, illustrations of configurations other than the wing shaft 200, the drum shaft 300, and the planetary gear mechanism 400 are omitted.

In the above embodiment, the drum shaft 300 is fixed to the ring gear 420, and the carrier shaft 444, that is, the carrier 440 is coupled to the clutch body 610. Thus, in the twin-shaft driving mode, in a state where the carrier 440 is fixed by the clutch body 610, when the wing shaft 200 rotates, the planetary gear 430 rotates with the rotation of the sun gear 410, and the ring gear 420 is more than the sun. The slow rotation speed of the wheel 410 reverses with the sun gear 410.

However, as shown in FIG. 11, the structure in which the drum shaft 300 is fixed to the carrier 440 may be employed. In this case, the ring gear 420 is attached with a shaft portion 422 whose tip end portion protrudes rearward from the drum shaft 300. Further, the clutch body 610 is coupled to the shaft portion 422. That is, the clutch body 610 is coupled to the ring gear 420 via the shaft portion 422. Further, as shown in FIG. 12, the planetary gear mechanism 400 includes a planetary gear 430a composed of a first gear 431 and a second gear 432 that rotate in opposite directions. The first gear 431 meshes with the sun gear 410 and the second gear 432 meshes with the ring gear 420. The support shaft 443 of the carrier 440 rotatably supports the first gear 431 and the second gear 432. In the two-shaft driving mode, in a state where the ring gear 420 is fixed by the clutch body 610, when the wing shaft 200 rotates, the planetary gear 430a rotates and revolves with the rotation of the sun gear 410, and the carrier 440 is compared with the sun gear 410. The slow rotational speed reverses the rotation of the sun gear 410. Thereby, the drum shaft 300 fixed to the carrier 440 rotates in the opposite direction to the wing shaft 200 fixed to the sun gear 410.

In the above-described embodiment, in the reverse two-axis operation, the magnitude of the load applied to the rotor blade 24 is determined based on the rotational speed of the drive motor 100 during forward rotation and reverse rotation. However, the load applied to the rotary wing 24 may be determined based on the magnitude of the drive current supplied to the drive motor 100 when the drive motor 100 is rotated forward or reversed.

Further, in the above-described first modification, the load amount of the laundry in the drum 22 is determined during the washing process and the rinsing process, and when the load amount is equal to or greater than the predetermined amount, the operation including the reverse two-axis operation and the single-axis operation is performed ( S207 to S213). However, it is also possible to perform the operation including the reverse two-axis operation and the single-axis operation regardless of the load amount in the washing process and the rinsing process.

Furthermore, in the above-described first modification, the drive motor 100 in the reverse two-axis operation in the case where the load amount is equal to or greater than a predetermined amount is caused to cause a problem such as the stall of the drive motor 100 to be less likely to occur. The ON time of the rotation and the reverse rotation is shorter than the ON time of the forward rotation and the reverse rotation of the drive motor 100 in the reverse two-axis operation in the case where the load amount is less than the predetermined amount. However, the on-time of both can also be set to be the same.

Further, in the reverse two-axis operation of the first modification, when the load applied to the rotary vane 24 during the forward rotation and the reverse rotation of the drive motor 100 is increased, the control of FIG. 9 of the above-described embodiment may be used. In the same manner, the switching to the single-axis operation is performed.

Further, the control operation of FIG. 9 of the above embodiment and the control operation of FIG. 10 of the above-described first modification may be performed only in any of the washing process and the rinsing process.

Further, in the above embodiment, the transmission mechanism portion T is configured to rotate the drum 22 and the rotary blade 24 at different rotational speeds. However, the transmission mechanism portion T may be configured to rotate the drum 22 and the rotary blades 24 at equal rotational speeds.

Further, in the above embodiment, the drive motor 100 is an outer rotor type DC brushless motor, but another type of drive motor may be used in the drive unit 30.

Further, in the above embodiment, the drum 22 is rotated about the tilt axis that is inclined with respect to the horizontal direction. However, the drum washing machine 1 may also adopt a structure in which the drum 22 rotates around the horizontal axis.

Further, the drum washing machine 1 of the above embodiment does not have a drying function, but the present invention is also applicable to a drum washing and drying machine which is a drum washing machine having a drying function.

Further, the embodiments of the present invention can be variously modified as appropriate within the scope of the technical idea shown in the claims.

Claims

A drum washing machine characterized by comprising:

The outer cylinder is disposed in the casing;

a drum disposed in the outer cylinder and rotatable about a horizontal axis or an inclined axis inclined with respect to a horizontal direction;

a rotating body disposed at a rear portion of the drum, the surface having a protrusion contacting the laundry;

Driving a motor for rotating the drum and the rotating body;

The transmission mechanism unit transmits the rotation of the drive motor to the drum and the rotating body such that the drum and the rotating body rotate in opposite rotational directions.
A drum washing machine according to claim 1, wherein

The transmission mechanism unit has:

a first rotating shaft fixed to the rotating body;

a second rotating shaft fixed to the drum;

A planetary gear mechanism includes: a sun gear, an annular ring gear surrounding the sun gear, a plurality of planet gears meshing with the sun gear and the ring gear, and a planet carrier rotatably holding the planet wheels,

In the planetary gear mechanism, one of the carrier and the ring gear is an output portion and the other is a fixed portion, the sun gear is coupled to the first rotating shaft, and the output portion is coupled to the In the second rotating shaft, when the sun gear rotates while the fixed portion is fixed in a non-rotating state, the output portion rotates in the opposite direction to the sun gear via the planetary gear.
The drum washing machine according to claim 2, further comprising:

The clutch mechanism unit switches the driving form of the drive motor between the first form and the second form, wherein the first form is to fix the fixed portion to be non-rotating to cause the drum and the drum a driving form in which the rotating body rotates in the opposite rotation direction, and the second aspect is a driving form in which the fixed portion and the sun gear are integrally rotated to integrally rotate the drum and the rotating body;

The control unit controls the operation of the drive motor and the clutch mechanism unit.
A drum washing machine according to claim 3, wherein

The control unit performs the following operations during the washing process and/or the rinsing process:

a first operation of rotating the drive motor in the first configuration and rotating the drum in a manner to tumble the laundry and rotating the rotary body and the drum in a reverse direction;

In the second operation, when the magnitude of the load applied to the rotating body in the first operation exceeds a predetermined size, the first embodiment is switched to the second form to rotate the driving motor, and The drum is rotated in such a manner that the drum is rotated and the rotating body is rotated integrally with the drum.
A drum washing machine according to claim 3, wherein

The control unit performs a second operation after performing the first operation during the washing process and/or the rinsing process, wherein the first operation rotates the driving motor in the first form to cause washing An operation of rotating the drum to rotate the drum and rotating the drum in a reverse direction; the second operation is switching from the first form to the second form to drive the motor Rotating and rotating the drum in such a manner that the laundry is tumbling and rotating the rotating body integrally with the drum.
A drum washing machine according to claim 5, wherein

The control unit,

When the load amount of the laundry in the drum is equal to or greater than a predetermined amount, the second operation is performed after the first operation is performed.

When the load amount of the laundry in the drum is less than a predetermined amount, only the first operation is performed without performing the second operation.