CN108866949B

CN108866949B - Planetary gear assembly for drum washing machine and drum washing machine

Info

Publication number: CN108866949B
Application number: CN201810122495.3A
Authority: CN
Inventors: 林光芳; 卢松; 苗雨来; 钱伟; 朱春雨
Original assignee: Wuxi Little Swan Co Ltd
Current assignee: Wuxi Little Swan Electric Co Ltd
Priority date: 2018-02-07
Filing date: 2018-02-07
Publication date: 2020-02-21
Anticipated expiration: 2038-02-07
Also published as: CN108866949A

Abstract

The invention discloses a planetary gear assembly for a drum washing machine and the drum washing machine, the planetary gear assembly comprises: a planetary gear assembly, the planetary gear assembly comprising: a planet carrier; the planetary gears are respectively and rotatably arranged on the planetary gear carrier, and are suitable for being respectively meshed with a main shaft used for driving the inner drum to rotate in the drum washing machine; the planet wheel outer gear shell is sleeved on the outer sides of the plurality of planet gears and is respectively meshed with the plurality of planet gears, and the planet wheel outer gear shell is suitable for being in transmission connection with a stirrer in the inner barrel. According to the planetary gear assembly provided by the embodiment of the invention, the torque of the main shaft can be transmitted to the stirrer, so that double driving of the inner cylinder and the stirrer is realized, and the planetary gear assembly has the advantages of stable power transmission, long service life and the like.

Description

Planetary gear assembly for drum washing machine and drum washing machine

Technical Field

The present invention relates to the technical field of laundry treatment devices, and more particularly, to a planetary gear assembly for a drum washing machine and a drum washing machine.

Background

When the drum washing machine washes clothes, the inner drum rotates to drive the clothes and water in the inner drum to rotate to wash the clothes, wherein the clothes are lifted and put down by the baffle in the inner drum and are beaten by the inner circumferential surface of the inner drum. However, the washing mode is single, so that the washing effect is influenced. Accordingly, there is a need for improvement.

For this reason, a drum type washing machine having a pulsator disposed in an inner tub has been proposed in the related art, and for example, PCT/CN2016/11037 discloses a drum type washing machine in which the pulsator is directly driven to rotate by a motor, and the motor rotates an inner tub by driving a planetary gear mechanism so that the rotation speed of the inner tub is lower than that of the pulsator. However, the inner drum itself is larger than the pulsator, and the inner drum needs to carry clothes and water during washing, so that the load of the planetary gear mechanism is larger, and the transmission effect of the planetary gear mechanism on power and the service life of the planetary gear mechanism are affected.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a planetary gear assembly for a drum washing machine, which can transmit the torque of a main shaft to a stirrer, thereby realizing double driving of an inner cylinder and the stirrer, and having the advantages of stable power transmission, long service life and the like.

The invention also provides a drum washing machine with the planetary gear assembly.

A planetary gear assembly for a drum washing machine according to an embodiment of a first aspect of the present invention includes: a planetary gear assembly, the planetary gear assembly comprising: a planet carrier; a plurality of planetary gears rotatably mounted to the planetary carrier, respectively, the plurality of planetary gears adapted to be engaged with a main shaft for driving an inner tub to rotate in the drum washing machine, respectively; the planet gear outer tooth shell is sleeved on the outer sides of the plurality of planet gears and is respectively meshed with the plurality of planet gears, and the planet gear outer tooth shell is suitable for being in transmission connection with a stirrer in the inner barrel.

According to the planetary gear assembly for the drum washing machine of the embodiment of the present invention, by providing the planetary gear assembly between the main shaft and the pulsator, it is possible to transmit the torque of the main shaft to the pulsator to drive the pulsator to rotate, and thus, the rotation of the pulsator and the rotation of the inner tub may be combined with each other into various washing patterns, such as either one of the pulsator and the inner tub to rotate alone or both of the pulsator and the inner tub to rotate simultaneously, and further such as the pulsator and the inner tub to rotate in the same direction or in opposite directions, thereby diversifying the washing patterns of the drum washing machine.

And, utilize the planetary gear portion dress to transmit the torque of main shaft to the agitator, can utilize the indirect drive agitator of driver, because the load of agitator department is less than the load of inner tube department far away, consequently compare the drum type washing machine who has the impeller among the correlation technique, the load that acts on planetary gear portion dress has obtained very big reduction, not only does benefit to the stable transmission of power in order to improve drum type washing machine's performance stability, has reduced planetary gear portion dress damaged risk moreover by a wide margin to extension drum type washing machine's life.

According to one embodiment of the invention, when the planetary carrier is allowed to rotate freely, the plurality of planetary gears transmit the torque of the main shaft to the planetary gear outer gear shell in the same direction; when the planet carrier is braked, the plurality of planet gears reversely transmit the torque of the main shaft to the planet gear outer gear shell.

Optionally, when the planet carrier is braked, the rotation speed of the planet gear outer gear shell is less than that of the main shaft.

Optionally, the planetary carrier is allowed to rotate freely, and the rotation speed of the planetary gear outer gear shell is equal to that of the main shaft.

According to one embodiment of the invention, the planetary carrier comprises: the planet wheel support is provided with a plurality of mounting bosses, and a plurality of planet wheels are rotatably mounted on one side surface of the planet wheel support respectively; the planet wheel fixed disk is arranged on the mounting bosses.

Optionally, the planet wheel support and the planet wheel fixing disc are both located in the planet wheel outer gear shell, and the planet wheel support and the planet wheel fixing disc respectively stop at two sides of the inner teeth of the planet wheel outer gear shell so as to be positioned in the axial direction of the planet wheel outer gear shell.

Optionally, a plurality of planet wheel mounting bases are arranged on one side face of the planet wheel support, a planet wheel fixing shaft is arranged on each planet wheel mounting base, and the plurality of planet gears are respectively rotatably mounted on the plurality of planet wheel fixing shafts in a one-to-one correspondence manner.

Optionally, the plurality of mounting bosses and the plurality of planetary gears are alternately arranged along the circumferential direction of the planetary gear support, each mounting boss is provided with a positioning column, the planetary gear fixing disc is provided with a plurality of positioning holes, and the plurality of positioning columns on the mounting bosses are matched in the plurality of positioning holes in a one-to-one correspondence manner.

According to one embodiment of the invention, the planetary gear assembly further comprises: the planet gear assembly is arranged in the planet gear shell, and the planet gear outer gear shell is in transmission connection with the stirrer through the planet gear shell.

Optionally, one of the inner peripheral wall of the planet wheel housing and the outer peripheral wall of the planet wheel outer gear housing is provided with a flange, and the other is provided with a clamping groove, wherein the flange is matched in the clamping groove.

Optionally, the flange is located the periphery wall of planet wheel outer gear shell and is a plurality of, every the flange is followed the axial extension of planet wheel outer gear shell and a plurality of the flange is followed the circumference interval setting of planet wheel outer gear shell, the draw-in groove is located the internal perisporium of planet wheel shell and is a plurality of, every the draw-in groove is followed the axial extension of planet wheel shell and a plurality of the draw-in groove is followed the circumference interval setting of planet wheel shell, it is a plurality of the flange one-to-one cooperates in a plurality of in the draw-in groove.

According to a further embodiment of the invention, the planetary gear arrangement further comprises: the planet wheel bearing is arranged in the planet wheel shell and located on the outer side of the planet gear assembly, the inner ring sleeve of the planet wheel bearing is arranged on the main shaft and rotates along with the main shaft, and the outer ring of the planet wheel bearing is connected with the planet wheel shell and rotates along with the planet wheel shell.

Optionally, the inner peripheral surface of the carrier is provided with engagement teeth adapted to engage with a second shaft inside the main shaft.

Still further, the planetary gear assembly further includes: and the planet wheel shell is provided with a through hole for the second shaft to pass through, and the second shaft end bearing is arranged in the through hole and is suitable for supporting the second shaft.

In some examples, the planetary gear assembly further comprises: and the shaft sealing element is arranged in the through hole and positioned outside the second shaft end bearing, and the shaft sealing element is suitable for sealing a gap between the second shaft and the planet wheel shell.

A drum washing machine according to an embodiment of a second aspect of the present invention includes the planetary gear assembly for a drum washing machine according to the above-described embodiment.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a drum washing machine according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of the drum-type washing machine with the drum mounted on the drum support;

FIG. 3 is an exploded view of the drum washing machine with the inner drum support assembled with the spindle, the second shaft, the planetary gear, etc.;

FIG. 4 is an assembled view of the main shaft, the main shaft sleeve and the main shaft flange of the drum washing machine;

FIG. 5 is an exploded view of the structure shown in FIG. 4;

FIG. 6 is a schematic structural view of the planetary gear assembly and the wear sleeve of the drum washing machine;

FIG. 7 is an exploded view of the planetary gear assembly of the drum washing machine;

FIG. 8 is an exploded view of the planetary gear assembly of the drum washing machine;

FIG. 9 is an exploded view of the planetary carrier shown in FIG. 8 prior to assembly with the planetary gears;

FIG. 10 is a schematic illustration of the assembly of the planetary carrier and the planetary gears shown in FIG. 8;

FIG. 11 is a schematic structural view of the planet carrier housing shown in FIG. 7;

fig. 12 is a rear view of a partial structure of a drum washing machine according to an embodiment of the present invention;

FIG. 13 is a schematic structural view of the brake shown in FIG. 12;

FIG. 14 is an exploded schematic view of the brake shown in FIG. 12;

FIG. 15 is a schematic structural view of the brake lever illustrated in FIG. 12;

FIG. 16 is a cross-sectional view taken along line A-A of FIG. 15;

FIG. 17 is a schematic view of the drum washing machine with the outer shell, inner drum and agitator removed and looking from the front to the back;

FIG. 18 is an enlarged view taken at I of FIG. 17;

FIG. 19 is a schematic view of the drum washing machine from the rear to the front with the outer casing, the inner drum and the agitator removed;

FIG. 20 is an enlarged view taken at II of FIG. 19;

FIG. 21 is a cross-sectional view taken along line B-B of FIG. 19;

FIG. 22 is a schematic front-to-back configuration of a drum washing machine with the outer casing removed and the inner drum removed, according to another embodiment of the present invention;

fig. 23 is a sectional view taken along C-C in fig. 22.

Reference numerals:

the drum type washing machine 100 is provided with,

an outer barrel 1, a mounting hole 11, a main shaft bearing seat 12,

an inner cylinder 2, an inner cylinder holder 201, a central shaft 2011, a frame 2012, an inner cylinder body 21, an inner cylinder rear cover 22,

the spindle 31, the cavity 311, the belt pulley 312, the belt 3121, the lock nut 313, the spindle bearing 314, the spindle flange 315, the spindle bushing 316,

the second shaft 32, the water supply passage 320, the second shaft bearing 3211, the second shaft end bearing 3212, the brake disc 322, the adapter 323, the adapter bearing 3231, the adapter seal 3232, the wear ring 324, the shaft seal 325,

the stirrer 4, a water spraying hole 41, a water collecting cavity 42, a water diversion channel 43, a convex rib 44,

the position of the motor 5, the motor shaft 51,

the planetary gear is mounted in a planetary gear unit 6,

the planetary gear assembly 61, the planetary gear carrier 611, the planetary gear carrier 6111, the mounting boss 6112, the positioning column 6113, the planetary gear mounting base 6114, the planetary gear fixing shaft 6115, the planetary gear fixing disc 6116, the positioning hole 6117, the limiting hole 6118, the planetary gear 612, the planetary gear outer gear shell 613, the flange 6131,

the planet wheel housing 62, the clamping groove 621, the through hole 622,

the planet wheel bearing 63, the partial seal 641, the wear sleeve 642,

the brake (7) is provided with a brake,

a chute seat 71, a chute 711, a limit platform 712, a circumferential positioning chute 713, a support chute 714, a via hole 715,

a brake lever 72, a stopper 720, a slide fitting part 721, an axial reinforcing rib 7211, a driving part 722, a bridge 723, a transverse reinforcing rib 7231, a longitudinal reinforcing rib 7232, a braking part 724, a linear sliding groove 725,

brake driver 73, brake cam 74, eccentric column 741, brake bracket 75, and limit slide groove 751.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A planetary gear assembly for a drum washing machine according to an embodiment of the present invention will be described with reference to fig. 1 to 23.

As shown in fig. 1 to 23, the planetary gear assembly 6 for a drum washing machine according to an embodiment of the present invention includes: a planetary gear assembly 61.

The planetary gear assembly 61 includes a planetary carrier 611, a plurality of planetary gears 612, and a planetary outer gear housing 613. A plurality of planetary gears 612 are rotatably mounted on the planetary gear carrier 611 respectively, the plurality of planetary gears 612 are adapted to be engaged with the main shaft 31 for driving the inner drum 2 to rotate in the drum washing machine respectively, a planetary gear outer gear housing 613 is sleeved outside the plurality of planetary gears 612 and is engaged with the plurality of planetary gears 612 respectively, and the planetary gear outer gear housing 613 is adapted to be in transmission connection with the stirrer 4 in the inner drum 2.

According to the planetary gear assembly 6 for the drum washing machine of the embodiment of the present invention, by providing the planetary gear assembly 6 between the main shaft 31 and the pulsator 4, it is possible to transmit the torque of the main shaft 31 to the pulsator 4 to drive the pulsator 4 to rotate, whereby the rotation of the pulsator 4 and the rotation of the inner tub 2 can be combined with each other into various washing patterns, such as either one of the pulsator 4 and the inner tub 2 rotates alone or both of the pulsator 4 and the inner tub 2 rotate simultaneously, and further such as the pulsator 4 and the inner tub 2 rotate in the same direction or in the opposite direction, thereby diversifying the washing patterns of the drum washing machine 100.

And, utilize planetary gear portion dress 6 to transmit the moment of main shaft 31 to the agitator, can utilize the indirect drive agitator 4 of driver, because the load of agitator 4 department is far less than the load of inner tube 2 department, consequently compare the drum type washing machine that has impeller (agitator) among the correlation technique, the load that acts on planetary gear portion dress 6 has obtained very big reduction, not only does benefit to the stable transmission of power in order to improve drum type washing machine 100's performance stability, and reduced planetary gear portion dress 6 the risk of damaging by a wide margin moreover, be favorable to prolonging drum type washing machine 100's life.

According to an embodiment of the present invention, when the planetary carrier 611 is allowed to rotate freely, the plurality of planetary gears 612 transmit the torque of the main shaft 31 to the planetary gear housing 613 in the same direction. When the planetary carrier 611 is braked, the plurality of planetary gears 612 reversely transmit the torque of the main shaft 31 to the planetary gear housing 613.

For example, when the drum washing machine 100 is in the dewatering mode, the planetary carrier 611 may be switched to allow free rotation, so that the planetary gear outer gear shell 613 drives the agitator 4 to rotate in the same direction as the inner drum 2, thereby ensuring that the clothes are not wound or torn during high-speed rotation dewatering.

When the drum washing machine 100 is in the washing mode, the planetary carrier 611 is braked, and the agitator 4 and the inner tub 2 are driven to rotate in the opposite direction by the planetary gear outer gear housing 613, so that the clothes and the water are sufficiently agitated, and the washing effect of the clothes during washing is improved.

It will be understood by those skilled in the art that the state switching of the planetary gear carrier 611 of the planetary gear assembly 6 in combination with the current mode of the drum washing machine 100 is not limited to the above-described embodiment, and may be combined with the free rotation state and the braking state of the planetary gear carrier 611 at the same time in any one of the dehydration and washing modes.

In some examples, the rotational speed of the planetary gear housing 613 is less than the rotational speed of the main shaft 31 when the planetary carrier 611 is braked. That is, when the planetary carrier 611 is braked, the power is transmitted at a variable speed. Therefore, when the clothes and the water are fully stirred, the clothes are prevented from being wound, and the stability and the noise of the whole machine are facilitated.

In some examples, when planet gear carrier 611 is allowed to rotate freely, the rotational speed of planet gear outer gear housing 613 is equal to the rotational speed of main shaft 31. That is, when the planetary carrier 611 is allowed to rotate freely, the pulsator 4 rotates synchronously (at the same speed and in the same direction) with the inner tube 2.

Referring to fig. 8 to 10, planetary carrier 611 includes: a planet wheel bracket 6111 and a planet wheel fixing disc 6116. The plurality of planet gears 612 are rotatably mounted on one side surface of the planet wheel support 6111, a plurality of mounting bosses 6112 are arranged on one side surface of the planet wheel support 6111, and the planet wheel fixing disc 6116 is mounted on the plurality of mounting bosses 6112, so that the planet wheel support 6111 is conveniently connected with the planet wheel fixing disc 6116.

In some examples, the planet carrier 6111 and the planet fixing plate 6116 are both located in the planet outer gear housing 613, and the planet carrier 6111 and the planet fixing plate 6116 are stopped at both sides of the internal teeth of the planet outer gear housing 613, respectively, so as to be positioned in the axial direction of the planet outer gear housing 613 by means of the internal tooth end of the planet outer gear housing 613. The planet wheel support 6111 can position a plurality of planet gears 612 for installation, the combined structure of the planet wheel support 6111 and the planet wheel fixing disc 6116 can limit a plurality of planet wheels between the planet wheel support 6111 and the planet wheel fixing disc 6116, modular assembly of the structure is achieved, the structure is more compact, and assembly is more convenient.

In some examples, the planet wheel fixing plate 6116 is arranged in the planet wheel outer gear shell 613, and is fixedly arranged on the planet wheel support 6111 through a fastener, and the connection is reliable.

In some examples, a side of the planet carrier 6111 is provided with a plurality of planet wheel mounts 6114, each planet wheel mount 6114 is provided with a planet wheel fixing shaft 6115, and the plurality of planet gears 612 are respectively rotatably mounted on the plurality of planet wheel fixing shafts 6115 in a one-to-one correspondence manner. The one-to-one correspondence here can be understood as that the number of the planet gears 612 is equal to the number of the planet wheel mounting seats 6114, and each planet wheel mounting seat 6114 is provided with one planet gear 612.

In some specific examples, the planet wheel mounting seat 6114 is provided with an insertion hole, one end of the planet wheel fixing shaft 6115 is inserted into the insertion hole of the planet wheel mounting seat 6114, and the other end of the planet wheel fixing shaft 6115 is placed in the limit hole 6118 of the planet wheel fixing plate 6116, so that the planet gear 612 is positioned and mounted.

In some examples, a side surface of the planet wheel carrier 6111 is provided with a plurality of mounting bosses 6112 and a plurality of planet wheel mounting seats 6114, and the plurality of mounting bosses 6112 and the plurality of planet wheel mounting seats 6114 are arranged alternately along the circumferential direction of the planet wheel carrier 6111, so that the plurality of mounting bosses 6112 and the plurality of planet gears 612 are arranged alternately along the circumferential direction of the planet wheel carrier 6111.

Furthermore, each mounting boss 6112 is provided with a positioning column 6113, the planet wheel fixing disc 6116 is provided with a plurality of positioning holes 6117, and the positioning columns 6113 on the plurality of mounting bosses 6112 are tightly fitted or welded in the plurality of positioning holes 6117 in a one-to-one correspondence manner, so that the planet wheel fixing disc 6116 is supported on the plurality of mounting bosses 6112, and the assembly of the planet wheel fixing disc 6116 and the planet wheel support 6111 is realized, and the connection is convenient.

As shown in fig. 7, 8 and 11, according to a further embodiment of the present invention, the planetary gear assembly 6 further includes: a planet wheel housing 62, and a planet gear assembly 61 arranged in the planet wheel housing 62, thereby enabling a modular design of the planet gear assembly 6. The planet wheel outer gear housing 613 is in driving connection with the mixer 4 via the planet wheel outer gear housing 62, for example, the planet wheel outer gear housing 62 and the mixer 4 can be combined by screws, and the planet wheel outer gear housing 613, the planet wheel outer gear housing 62 and the mixer 4 are fixedly connected to realize synchronous operation, so that the torque of the main shaft 31 can be transmitted to the mixer 4 via the planet wheel gear assembly 6.

In some examples, one of the inner circumferential wall of the planet wheel housing 62 and the outer circumferential wall of the planet wheel outer gear housing 613 is provided with a flange 6131, the other of the inner circumferential wall of the planet wheel housing 62 and the outer circumferential wall of the planet wheel outer gear housing 613 is provided with a clamping groove 621, and the flange 6131 is matched in the clamping groove 621 to ensure the fixed connection between the planet wheel housing 62 and the planet wheel outer gear housing 613.

In some alternative examples, the outer peripheral wall of the planet outer gear housing 613 is provided with a plurality of flanges 6131, each flange 6131 extends in the axial direction of the planet outer gear housing 613, and the plurality of flanges 6131 are spaced apart in the circumferential direction of the planet outer gear housing 613.

Correspondingly, the internal perisporium of planet wheel shell 62 is equipped with a plurality of draw-in grooves 621, every draw-in groove 621 extends along the axial of planet wheel shell 62, a plurality of draw-in grooves 621 set up along the circumference interval of planet wheel shell 62, a plurality of flanges 6131 cooperate in a plurality of draw-in grooves 621 one-to-one, both can realize being connected of planet wheel outer gear shell 613 and planet wheel shell 62, can guarantee the circumference location of planet wheel outer gear shell 613 and planet wheel shell 62 again, realize the synchronous operation of planet wheel outer gear shell 613 and planet wheel shell 62.

It can be understood that the arrangement positions of the plurality of flanges 6131 and the plurality of clamping grooves 621 can be interchanged, for example, the plurality of flanges 6131 are all arranged on the inner peripheral wall of the planet wheel housing 62, and the plurality of clamping grooves 621 are all arranged on the outer peripheral wall of the planet wheel housing 613, it is also possible that a part of the plurality of flanges 6131 is arranged on the outer peripheral wall of the planet wheel housing 613, another part is arranged on the inner peripheral wall of the planet wheel housing 62, and the plurality of clamping grooves 621 are also correspondingly arranged on the outer peripheral wall of the planet wheel housing 613 and the inner peripheral wall of the planet wheel housing 62, respectively, so that the connection is convenient.

As shown in fig. 7, in conjunction with fig. 1, 21 and 23, according to a further embodiment of the present invention, the planetary gear assembly 6 further comprises: the planet wheel bearing 63 is arranged in the planet wheel housing 62 and located on the outer side of the planet wheel gear assembly 61, the inner ring of the planet wheel bearing 63 is sleeved on the spindle 31 and rotates along with the spindle 31, the outer ring of the planet wheel bearing 63 is connected with the planet wheel housing 62 and rotates along with the planet wheel housing 62, and the planet wheel housing 62 can be guaranteed to rotate relative to the spindle 31 by the arrangement of the planet wheel bearing 63.

Alternatively, the inner peripheral surface of the carrier 611 is provided with engagement teeth adapted to engage with the second shaft 32 inside the main shaft 31. Thus, the carrier 611 is fixedly attached to the second shaft 32, and rotates in synchronization with the second shaft 32.

In some alternative examples, the second shaft 32 is supported by a second shaft bearing 3211 that is sleeved thereon and disposed within the cavity 311. Specifically, at least two second shaft bearings 3211 are disposed in the cavity 311 of the main shaft 31, and the second shaft 32 passes through the at least two second shaft bearings 3211 to be supported in the cavity 311 of the main shaft 31 and rotatable with respect to the main shaft 31.

In some examples, the planetary gear assembly 6 further includes a second shaft end bearing 3212, the planetary gear housing 62 is provided with a through hole 622, the second shaft 32 is disposed through the through hole 622, and the second shaft 32 is supported by the second shaft end bearing 3212 sleeved thereon and disposed in the through hole 622. Therefore, one end of the planet wheel shell 62 is supported on the second shaft 32 through the second shaft end bearing 3212, and the other end of the planet wheel shell 62 is supported on the main shaft 31 through the planet wheel bearing 63, so that the positioning and installation of the planet wheel gear assembly 6 are realized, and the planet wheel shell 62 can be ensured to rotate relative to the second shaft 32 and the main shaft 31.

In some examples, the planetary gear assembly 6 further includes a shaft seal 325, the shaft seal 325 being disposed within the through bore 622 and outside the second shaft end bearing 3212, the shaft seal 325 being adapted to seal a gap between the second shaft 32 and the planet gear housing 62.

Specifically, a shaft seal 325 is sleeved on the second shaft 32, the shaft seal 325 is arranged on the second shaft 32 and located outside the second shaft end bearing 3212, that is, the shaft seal 325 is located farther from the axial center of the second shaft 32 relative to the second shaft end bearing 3212, and the shaft seal 325 seals a gap between the second shaft 32 and the planetary gear housing 62, so that water in the water supply channel 320 of the second shaft 32 is prevented from entering the cavity 311 of the main shaft 31 and the planetary gear assembly 6 through the gap between the second shaft 32 and the planetary gear housing 62.

The drum washing machine 100 according to an embodiment of the present invention includes the planetary gear assembly 6 for the drum washing machine according to the above-described embodiment.

Since the planetary gear assembly 6 for the drum washing machine according to the embodiment of the present invention has the above-described technical effects, the drum washing machine 100 according to the embodiment of the present invention also has the above-described technical effects in that, by providing the planetary gear assembly 6 between the main shaft 31 and the pulsator 4 of the drum washing machine 100, the torque of the main shaft 31 is transmitted to the pulsator 4 by the planetary gear assembly 6 to drive the pulsator 4 to rotate, and thus, the rotation of the pulsator 4 and the rotation of the inner tub 2 can be combined with each other into various washing patterns, thereby diversifying the washing patterns of the drum washing machine 100.

And, utilize planetary gear portion dress 6 to transmit the torque of main shaft 31 to agitator 4, can utilize the indirect drive agitator 4 of driver, because the load of agitator 4 department is less than the load of inner tube 2 department far away, consequently compare the drum type washing machine that has the impeller among the correlation technique, the load that acts on planetary gear portion dress 6 has obtained very big reduction, not only does benefit to the stable transmission of power in order to improve drum type washing machine 100's performance stability, and reduced planetary gear portion dress 6 the risk of damaging by a wide margin moreover, be favorable to prolonging drum type washing machine 100's life.

Some embodiments of the drum washing machine 100 according to the present invention will be described in detail below with reference to fig. 1 to 23.

As shown in fig. 1 to 23, a drum washing machine 100 according to an embodiment of the present invention includes: the outer tub 1, the inner tub 2, the agitator 4, a driver (a motor 5 described below), and the planetary gear assembly 6.

The inner barrel 2 is rotatably provided in the outer barrel 1. The stirrer 4 is rotatably provided in the inner cylinder 2. The driver is in transmission connection with the inner cylinder 2 through a main shaft 31, and the main shaft 31 transmits the torque of the driver to the inner cylinder 2. Planetary gear assembly 6 is in transmission connection with spindle 31 and agitator 4, respectively, and when driver drives spindle 31 to rotate, planetary gear assembly 6 can transmit the torque of spindle 31 to agitator 4, thereby driving agitator 4 to rotate.

According to the drum washing machine 100 of the embodiment of the present invention, by providing the driver, the inner tub 2 is driven to rotate by driving the main shaft 31 to rotate by the driver, and further, the pulsator 4 is provided in the inner tub 2, and the torque of the main shaft 31 is transmitted to the pulsator 4 by the planetary gear assembly 6 to drive the pulsator 4 to rotate, whereby the rotation of the pulsator 4 and the rotation of the inner tub 2 can be combined with each other into various washing modes, for example, any one of the pulsator 4 and the inner tub 2 rotates alone or the pulsator 4 and the inner tub 2 rotate simultaneously, and further, for example, the pulsator 4 and the inner tub 2 rotate in the same direction or in the opposite direction, thereby diversifying the washing modes of the drum washing machine 100.

In addition, the driver drives the inner barrel 2 through the main shaft 31, so as to directly drive the components with larger load by using the driver, the number of stages of power transmission is less, the power transmission is more direct, so as to stably drive the inner drum which has a large volume and needs to contain clothes and water, a planetary gear assembly 6 is arranged between the main shaft 31 and the stirrer 4, the torque of the main shaft 31 is transmitted to the stirrer by the planetary gear assembly 6, so as to indirectly drive the stirrer 4 by a driver, because the load at the pulsator 4 is much smaller than the load at the inner tub 2, the load acting on the planetary gear unit 6 is greatly reduced, compared to the related art drum washing machine having the pulsator, not only facilitating stable power transmission to improve the performance stability of the drum washing machine 100, and the risk of damage to the planetary gear assembly 6 is greatly reduced to extend the service life of the drum washing machine 100.

Therefore, the drum washing machine 100 according to the embodiment of the present invention can implement various washing modes, and has the advantages of stable performance, long service life, etc.

According to the drum washing machine 100 of one embodiment of the present invention, the planetary gear assembly 6 is switchable between the first state and the second state.

When the planetary gear unit 6 is in the first state, the planetary gear unit 6 transmits the torque of the main shaft 31 to the pulsator 4 in the same direction, and rotates the pulsator 4 in the same direction as the inner tube 2. When the planetary gear unit 6 is in the second state, the planetary gear unit 6 transmits the torque of the main shaft 31 to the pulsator 4 in a reverse direction, thereby rotating the pulsator 4 in a reverse direction to the inner tub 2. For example, if the driver drives the main shaft 31 to rotate clockwise, when the planetary gear assembly 6 is in the first state, the planetary gear assembly 6 transmits the torque of the main shaft 31 to the agitator 4 in the same direction, so that the agitator 4 and the inner tube 2 both rotate clockwise. When the planetary gear unit 6 is in the second state, the planetary gear unit 6 reversely transmits the torque of the main shaft 31 to the pulsator 4, thereby rotating the pulsator 4 counterclockwise.

For example, when the drum washing machine 100 is in the dehydration mode, the planetary gear assembly 6 can be switched to the first state, and the power transmission manner of the planetary gear assembly 6 in the first state drives the agitator 4 and the inner tub 2 to rotate in the same direction, so as to ensure that the clothes are not wound or torn during high-speed spin dehydration.

When the drum washing machine 100 is in the washing mode, the planetary gear assembly 6 can be switched to the second state, and the power transmission mode of the planetary gear assembly 6 in the second state drives the agitator 4 and the inner tub 2 to rotate in opposite directions, so that clothes and water are sufficiently agitated, and the washing effect of clothes during washing is improved.

It will be understood by those skilled in the art that the combination of the state switching of the planetary gear assembly 6 and the current mode of the drum washing machine 100 is not limited to the above-described embodiment, and the first state and the second state of the planetary gear assembly 6 may be combined at the same time in any one of the dehydration mode and the washing mode.

Therefore, by arranging the planetary gear assembly 6 which can be switched between the first state and the second state, the rotation direction of the stirrer 4 can be adjusted, so that the stirrer 4 and the inner barrel 2 rotate in the same direction and in the opposite direction, and the working modes suitable for different working conditions are formed by matching with the inner barrel 2.

In some examples, the rotational speed of the agitator 4 is less than the rotational speed of the drum 2 when the agitator 4 rotates in the opposite direction to the drum 2. That is, when the planetary gear unit 6 is in the second state, the power transmission is performed at a reduced speed. Therefore, when the clothes and the water are fully stirred, the clothes are prevented from being wound, and the stability and the noise of the whole machine are facilitated.

In some examples, the rotational speed of the agitator 4 is equal to the rotational speed of the drum 2 when the agitator 4 rotates in the same direction as the drum 2. That is, when the planetary gear unit 6 is in the first state, the agitator 4 and the inner cylinder 2 rotate in synchronization (at the same speed and in the same direction).

As shown in fig. 6 to 11, according to one embodiment of the present invention, the planetary gear assembly 6 includes a planetary gear assembly 61 and the planetary gear assembly 61 includes: a planet carrier 611, a plurality of planet gears 612 and a planet outer gear housing 613.

The plurality of planetary gears 612 are rotatably mounted to the planetary carrier 611, respectively, the outer peripheral wall of the main shaft 31 has meshing teeth, and the plurality of planetary gears 612 mesh with the meshing teeth on the main shaft 31, respectively. The planetary gear housing 613 is sleeved outside the plurality of planetary gears 612, and the planetary gear housing 613 is engaged with the plurality of planetary gears 612, and the planetary gear housing 613 is in transmission connection with the stirrer 4.

It is understood that the inner peripheral wall of the planetary gear outer gear housing 613 has meshing teeth that mesh with the plurality of planetary gears 612. Thus, the main shaft 31, the plurality of planetary gears 612, the carrier 611, and the planetary outer gear housing 613 constitute a planetary gear train, and a shaft section of the main shaft 31 that meshes with the plurality of planetary gears 612 forms a sun gear of the planetary gear train.

Wherein the planetary gear unit 6 is in the first state when the planetary carrier 611 is allowed to rotate freely, thereby rotating the pulsator 4 in the same direction as the inner tub 2; when the carrier 611 is braked, the pinion gear assembly 6 is in the second state, the plurality of pinion gears 612 rotate on their own axes, and the pinion outer gear housing 613 rotates in the opposite direction to the main shaft 31, so that the pulsator 4 rotates in the opposite direction to the inner tube 2. Thus, the operating state of the pulsator 4 can be controlled by switching the state of the planetary carrier 611 of the planetary gear unit 6, and the switching of the plurality of operation modes of the drum washing machine 100 can be realized.

Thus, according to the drum washing machine 100 of the embodiment of the present invention, by providing the planetary gear assembly 6 between the main shaft 31 and the pulsator 4, the torque of the main shaft 31 is transmitted to the pulsator 4 by the planetary gear assembly 6 to drive the pulsator 4 to rotate, whereby the rotation of the pulsator 4 and the rotation of the inner tub 2 can be combined with each other into various washing patterns, for example, any one of the pulsator 4 and the inner tub 2 rotates alone or the pulsator 4 and the inner tub 2 rotate simultaneously, and further, for example, the pulsator 4 and the inner tub 2 rotate in the same direction or in the opposite direction, thereby diversifying the washing patterns of the drum washing machine 100.

And, utilize planetary gear portion dress 6 to transmit the torque of main shaft 31 to agitator 4, can utilize the driver to drive agitator 4 indirectly, because the load of agitator 4 department is far less than the load of inner tube 2 department, consequently compare the drum type washing machine that has the impeller among the relevant art, the load that acts on planetary gear portion dress 6 has obtained very big reduction, not only does benefit to the stable transmission of power in order to improve drum type washing machine 100's performance stability, has reduced planetary gear portion dress 6 the risk of damaging moreover by a wide margin to prolong drum type washing machine 100's life.

According to an embodiment of the present invention, the drum washing machine 100 further includes: a second shaft 32 and a brake 7, the second shaft 32 is engaged with the planetary carrier 611, and the brake 7 controls whether the planetary carrier 611 is braked or not through the second shaft 32.

In some examples, the side peripheral wall of the second shaft 32 is provided with splines, that is, the second shaft 32 forms a spline shaft, the planetary carrier 611 is provided with spline grooves matched with the splines of the second shaft 32, and the second shaft 32 is fixedly connected with the planetary carrier 611 through the matching of the splines and the spline grooves, so that the synchronous operation of the second shaft 32 and the planetary carrier 611 is ensured.

When the brake 7 brakes the second shaft 32, the planetary carrier 611 cannot rotate due to braking; when the brake 7 is disengaged from the second shaft 32, the planetary carrier 611 is in a free state. Therefore, by providing the brake 7, the operation state of the second shaft 32 can be switched, so that the planetary gear unit 6 is switched between the first state and the second state, and the planetary gear unit 6 switched between the first state and the second state can adjust the rotation direction of the agitator 4, so that the agitator 4 and the inner cylinder 2 rotate in the same direction and in the opposite direction, thereby forming the operation modes suitable for different working conditions in cooperation with the inner cylinder 2.

In some examples, the main shaft 31 has a cavity 311 extending therethrough in an axial direction thereof, and the second shaft 32 is inserted into the cavity 311. For example, the central axis of the main shaft 31 is parallel to and coincident with the central axis of the second shaft 32, and the main shaft 31 is rotatable relative to the second shaft 32, thereby respectively driving the inner drum 2 and the agitator 4 to rotate, and ensuring the normal operation of the drum washing machine 100.

As shown in fig. 12 to 21, in some examples, a brake disc 322 is drivingly connected to the second shaft 32, and when the brake 7 is engaged with the brake disc 322, the second shaft 32 is braked, thereby achieving braking of the planetary carrier 611; when brake 7 is disengaged from brake disc 322, second shaft 32 is free from carrier 611.

Further, referring to fig. 13 to 16, the brake 7 includes: a chute seat 71, a brake lever 72 and a brake actuator 73. The chute base 71 is provided with a slide 711, the brake lever 72 is slidably fitted to the slide 711 between an extended position and a retracted position, the brake lever 72 is engaged with the brake disc 322 when the brake lever 72 is in the extended position, the brake lever 72 is disengaged from the brake disc 322 when the brake lever 72 is in the retracted position, the brake driver 73 is mounted to the chute base 71 and is drivingly connected to the brake lever 72, and the brake driver 73 drives the brake lever 72 to move between the extended position and the retracted position. Thus, the brake lever 72 is driven by the brake actuator 73 to move along the slide channel 711, so that the brake lever 72 is engaged with and disengaged from the brake disc 322, and the switching is convenient.

According to the brake 7 for the drum washing machine of the embodiment of the present invention, the brake lever 72 is driven by the brake driver 73 to move between the extended position and the retracted position, the second shaft 32 is switched between the free state and the braking state by engaging or disengaging the brake lever 72 with or from the brake disc 322 on the second shaft 32 of the drum washing machine 100, and the torque of the main shaft 31 is transmitted to the pulsator 4 through the planetary gear assembly 6 to drive the pulsator 4 to rotate, so that the rotation of the pulsator 4 and the rotation of the inner tub 2 can be combined with each other into various washing modes, and the washing modes of the drum washing machine 100 can be diversified.

The number of parts of the brake 7 is small, and the structure is simpler. The brake lever 72 is driven by the brake driver 73 to move, the brake lever 72 is engaged with the brake disc 322 when in the extending position so as to switch the second shaft 32 to the braking state, and is disengaged from the brake disc 322 when in the retracting position so as to switch the second shaft 32 to the free state, therefore, compared with the drum washing machine with the wave wheel in the related art, the brake lever 72 directly acts on the brake disc 322 on the second shaft 32, the control is more convenient, the transmission structure between the brake lever 72 and the second shaft 32 is less, the power transmission is more direct, the operation state of the second shaft 32 can be stably switched, and the stable transmission of the power is facilitated so as to improve the performance stability of.

Therefore, the brake 7 for the drum washing machine according to the embodiment of the present invention can realize the mode switching of the agitator 4 and the inner drum 2 in cooperation, and has the advantages of simple structure, convenient control, stability, etc.

In some specific examples, the brake lever 72 is provided with a stop block 720, the slide 711 is provided with a stop block 712, and the stop block 712 is arranged in the slide 711 and is matched with the stop block 720 on the brake lever 72, so that the moving path of the brake lever 72 is limited, that is, the brake lever 72 can be axially limited, the brake lever 72 is prevented from sliding out of the slide 711 and being separated from the slide groove seat 71, and the operational reliability of the brake 7 is further ensured.

In some specific examples, a circumferential positioning sliding groove 713 is formed in the sliding channel 711, and the stop block 720 is slidably fitted in the circumferential positioning sliding groove 713. By arranging the circumferential positioning sliding groove 713 in the sliding rail 711, when the brake lever 72 moves along the sliding rail 711, the limiting block 720 moves in the circumferential positioning sliding groove 713, and the circumferential positioning sliding groove 713 can circumferentially position the brake lever 72, so that the rotation prevention effect is realized.

As shown in fig. 15 and 16, in some examples, the brake lever 72 includes: a ramp mating portion 721, a transmission portion 722, a bridge 723, and a brake portion 724.

The slide way matching part 721 is matched with the slide way 711 in a sliding way, the transmission part 722 is connected at one end of the slide way matching part 721, the bridge part 723 is connected at the other end of the slide way matching part 721, namely, two ends of the slide way matching part 721 are respectively connected with the transmission part 722 and the bridge part 723, the braking part 724 is connected at one end, far away from the slide way matching part 721, of the bridge part 723, the transmission part 722 is in transmission connection with the brake driver 73, so that the brake lever 72 is driven by the driver to move, the braking part 724 is meshed with the brake disc 322 when the brake lever 72 is located at an extending position, the braking part 724 is separated from the brake disc 322 when the brake lever 72 is located at a retracting position, the.

In some alternative examples, the cross-section of the runner mating part 721 and the minimum cross-section of the runner 711 are round shapes that fit each other, and the bridge 723 is rectangular in cross-section and has an area smaller than the cross-sectional area of the runner mating part 721.

That is, the cross-sectional area of the bridge 723 is smaller than the minimum cross-sectional area of the runners 711, which can reduce the fitting area of the brake lever 72 with the inner wall surface of the runners 711, thereby reducing the friction force of the brake lever 72 with the sliding inner wall surface and further reducing the movement resistance of the brake lever 72.

In some optional examples, the bridge 723 is provided with a plurality of transverse reinforcing ribs 7231 and a plurality of longitudinal reinforcing ribs 7232, each transverse reinforcing rib 7231 extends in the width direction of the bridge 723 and the plurality of transverse reinforcing ribs 7231 are arranged at intervals in the length direction of the bridge 723, each longitudinal reinforcing rib 7232 extends in the length direction of the bridge 723 and the plurality of longitudinal reinforcing ribs 7232 are arranged at intervals in the width direction of the bridge 723, and each longitudinal reinforcing rib 7232 is connected to the plurality of transverse reinforcing ribs 7231, respectively. The plurality of transverse reinforcing ribs 7231 and the plurality of longitudinal reinforcing ribs 7232 are arranged on the bridge portion 723, so that the structural strength of the bridge portion 723 is improved, the use reliability of the brake 7 is ensured, and the service life of the brake 7 is further prolonged.

In some specific examples, the slide fitting portion 721 is provided with a plurality of axial reinforcing ribs 7211, each of the axial reinforcing ribs 7211 extends in the axial direction of the slide fitting portion 721 and the plurality of axial reinforcing ribs 7211 are provided at intervals in the circumferential direction of the slide fitting portion 721, thereby improving the structural strength of the slide fitting portion and further ensuring the reliability in use of the brake 7.

As shown in fig. 13, in some examples, a supporting sliding groove 714 is provided in the sliding channel 711, and the transmission portion 722 is slidably supported by the supporting sliding groove 714.

In some specific examples, at least two support ribs protruding from the inner surface of the sliding way 711 are disposed in the sliding way 711, each support rib extends along the length direction of the sliding way 711, a support sliding groove 714 is defined between two adjacent support ribs, and the transmission part 722 is supported on the support ribs and is movable along the support sliding groove 714. Therefore, the supporting sliding groove 714 is arranged in the sliding rail 711, so that the transmission part 722 can be supported and positioned, the anti-rotation effect is realized, the reliability of the sliding fit between the brake lever 72 and the sliding groove seat 71 can be improved, and the normal work of the driver is ensured.

According to a further embodiment of the invention, the brake 7 further comprises: the brake cam 74, the driver is a motor and is in transmission connection with the brake lever 72 through the brake cam 74, and the brake cam 74 can convert the rotary motion of the motor shaft of the motor into the linear motion of the brake lever 72 in the slide 711, so as to ensure the normal operation of the brake 7.

In some examples, the brake cam 74 is provided with an eccentric post 741, the brake lever 72 is provided with a linear slide slot 725, and the eccentric post 741 is slidably fitted within the linear slide slot 725. When the motor drives the brake cam 74 to rotate, the eccentric column 741 of the brake cam 74 eccentrically rotates, and the slide channel 711 limits the brake rod 72 to linearly move only along the length direction of the brake rod, so that when the eccentric column 741 slides in the linear slide channel 725, the brake rod 72 is driven to move along the length direction of the slide channel 711, the operation is continuous, and the use reliability is high.

Alternatively, the length direction of the transmission part 722 is perpendicular to the length direction of the bridge 723 and the slideway mating part 721, and the linear sliding chute 725 is arranged on the transmission part 722 of the brake lever 72 and extends along the length direction of the transmission part 722, so that the length direction of the linear sliding chute 725 is perpendicular to the linear movement direction of the brake lever 72, and the structure is simple and compact, and is convenient to mate with the brake cam 74, thereby achieving the above function.

In some examples, the chute seat 71 is provided with a through hole 715 communicating with the slide channel 711, a portion of the brake cam 74 is provided in the through hole 715 to connect with the brake actuator 73, and another portion of the brake cam 74 protrudes into the slide channel 711 through the through hole 715, thereby facilitating engagement of the eccentric post 741 of the brake cam 74 with the linear slide channel 725 of the brake lever 72.

As shown in fig. 12, in some examples, the chute seat 71 is mounted on the rear wall of the tub 1 through a brake bracket 75, a brake disc 322 is located outside the tub 1 and mounted on one end of the second shaft 32 extending out of the tub 1, and the brake 7 is located outside the tub 1 so as to cooperate with the brake disc 322 to realize switching between different operation modes of the drum washing machine 100.

The brake lever 72 of the brake 7 is slidable between an extended position and a retracted position, the brake lever 72 is stopped between two adjacent locking teeth of the brake disc 322 when the brake lever 72 is in the extended position, and the brake lever 72 is disengaged from the brake disc 322 when the brake lever 72 is in the retracted position.

In some specific examples, the brake bracket 75 is provided with a limit sliding groove 751, the limit sliding groove 751 extends along the radial direction of the brake disc 322, the part of the extension sliding way 711 of the brake bar 72 is slidably fitted with the limit sliding groove 751, and the limit sliding groove 751 limits the brake bar 72, so that the limit sliding groove 751 not only can play a role of guiding so as to ensure the linear movement of the brake bar 72, but also can play a role of protecting the brake bar 72 and preventing the brake bar 72 from being broken when moving.

According to another embodiment of the present invention, the drum washing machine 100 further includes: and a detection device (not shown) for detecting the power of the driver, when the detection device detects that the power of the driver reaches a preset value, the brake 7 controls the planetary carrier 611 through the second shaft 32 to be allowed to rotate freely, so that the stirrer 4 and the inner drum 2 rotate in the same direction, the phenomenon that the clothes in the inner drum 2 are seriously wound to cause tearing damage is prevented, and the safety is high.

As shown in fig. 1 to 3, according to an embodiment of the present invention, the drum washing machine 100 further includes: the inner cylinder support 201 is installed on the rear wall of the inner cylinder 2 and located between the rear wall of the inner cylinder 2 and the rear wall of the outer cylinder 1, and the main shaft 31 is rotatably connected with the inner cylinder 2 through the inner cylinder support 201 and is rotatably supported on the rear wall of the outer cylinder 1. That is, the main shaft 31 can directly drive the inner cylinder 2 to rotate, and at the same time, the stirrer 4 can be driven to rotate by the planetary gear assembly 6, so that the planetary gear assembly 6 is not easy to damage.

Specifically, the inner cylinder 2 includes an inner cylinder body 21 whose two axial ends are open respectively, and an inner cylinder rear cover 22 provided at the rear end of the inner cylinder body 21, a folded edge extending in the axial direction of the inner cylinder body 21 is formed on the outer peripheral edge of the inner cylinder rear cover 22, and the rear end of the inner cylinder body 21 is connected to the folded edge of the inner cylinder rear cover 22. The inner cylinder bracket 201 is fixed at a connection of the inner cylinder body 21 and the folded edge of the inner cylinder rear cover 22 by a connector (e.g., a screw), so that the inner cylinder 2 is fixed to the inner cylinder bracket 201 to be rotatable with the inner cylinder bracket 201 relative to the outer tub 1.

In some examples, the inner cylinder holder 201 has a central shaft portion 2011 and a rack portion 2012, the central shaft portion 2011 extends in the axial direction of the outer cylinder 1, the central shaft portion 2011 is rotatably supported on the rear wall of the outer cylinder 1, the rack portion 2012 is connected to the side peripheral wall of the central shaft portion 2011, and the inner cylinder 2 is mounted on the rack portion 2012.

Optionally, the frame part 2012 of the inner cylinder bracket 201 includes a plurality of (e.g., three) connecting arms distributed along the circumferential direction of the inner cylinder 2, each connecting arm extends along the radial direction of the inner cylinder 2, and the inner end of each connecting arm is connected to the side circumferential wall of the central shaft part 2011, the outer end of each connecting arm is connected to the inner cylinder 2 through a connecting piece, and by adopting a plurality of connecting arms to connect the inner cylinder 2, the reliability and stability of connection between the inner cylinder bracket 201 and the inner cylinder 2 can be ensured, the material consumption of the inner cylinder bracket 201 can be reduced, the material cost and weight are reduced, and the cost performance of the drum washing machine 100 is. It will be appreciated that the shelf 2012 may be integrally formed with the central shaft portion 2011.

In some examples, the rear wall of the tub 1 is provided with a mounting hole 11 and a spindle bearing housing 12 is provided in the mounting hole 11, and the spindle 31 is rotatably supported by a spindle bearing 314 provided in the spindle bearing housing 12. That is, the spindle bearing housing 12 and the spindle bearing 314 mounted in the spindle bearing housing 12 are disposed in the mounting hole 11 of the tub 1, and the spindle 31 extends in the axial direction of the mounting hole 11 and extends into the mounting hole 11, and is mounted on the rear wall of the tub 1 through the spindle bearing 314, so that the spindle 31 can rotate relative to the tub 1.

Referring to fig. 4 and 5 in combination with fig. 1, 21 and 23, in some examples, a main shaft bushing 316 is sleeved on the main shaft 31, a main shaft flange 315 is sleeved on the main shaft bushing 316, and the inner cylinder support 201 is connected to the main shaft flange 315, so that the connection is convenient and reliable.

Optionally, the main shaft bushing 316 is sleeved on the main shaft 31, the main shaft flange 315 is sleeved on the main shaft bushing 316, and the inner cylinder bracket 201 is poured on the main shaft flange 315, for example, the inner cylinder bracket 201 may be an aluminum injection member, and the main shaft 31, the main shaft bushing 316, and the main shaft flange 315 may be integrally formed by machining, which is beneficial to improving the production efficiency of the drum washing machine 100.

In some examples, the planetary gear assembly 6 is sleeved with a partial sealing member 641, and the partial sealing member 641 seals a gap between the planetary gear assembly 6 and the spindle flange 315, so as to ensure the connection sealing performance between the planetary gear assembly 6 and the spindle flange 315.

Furthermore, the outer peripheral wall of the planetary gear unit 6 is provided with an annular spacing ring, a wear-resistant sleeve 642 is sleeved outside the planetary gear unit 6, one end of the wear-resistant sleeve 642 abuts against the annular spacing ring, the wear-resistant sleeve 642 is located between the planetary gear unit 6 and a partially-installed sealing element 641, the partially-installed sealing element 641 is formed into an annular shape and is sleeved on the wear-resistant sleeve 642, the inner surface of the partially-installed sealing element 641 is connected with the wear-resistant sleeve 642 in a sealing mode, and the outer surface of the partially-installed sealing element 641 is connected with the spindle flange 315 and the inner cylinder. By providing the wear sleeve 642 between the partial seal 641 and the planetary gear unit 6 and fitting the wear sleeve 642 to the partial seal 641, it is possible to ensure dimensional accuracy and improve wear resistance.

As shown in fig. 12, according to an embodiment of the present invention, the pulley 312 is drivingly connected to the main shaft 31, the driver is the motor 5, and the motor 5 drives the pulley 312 to rotate by the belt 3121 tensioned on the pulley 312, i.e. the belt 312 is wound on the motor shaft 51 and the pulley 312. Therefore, the belt pulley 312 and the belt 3121 are provided on the main shaft 31, so that the transmission connection between the main shaft 31 and the driver is realized through the belt 3121, thereby the impact and vibration load can be alleviated, the operation of the main shaft 31 is smooth, and the noise generated during the operation is low.

In some examples, the pulley 312, the belt 3121 and the driver are located outside the tub 1, and the pulley 312 is stopped between the rear wall of the tub 1 and the lock nut 313 on the main shaft 31. That is, the belt pulley 312 is fixedly connected to the main shaft 31 and located between the rear wall of the outer tub 1 and the locking nut 313, and the locking nut 313 is provided to ensure the positioning and installation of the belt pulley 312, so that the driver drives the belt pulley 312 to rotate through the belt 3121, and the belt pulley 312 drives the main shaft 31 to rotate, thereby realizing the synchronous rotation of the belt pulley 312 and the main shaft 31.

As shown in fig. 22 and 23, according to a further embodiment of the present invention, the pulsator 4 has water spray holes 41, and the drum washing machine 100 further includes a water supply device (not shown) which is respectively communicated with the outer tub 1 and the pulsator 4, supplies water in the outer tub 1 to the pulsator 4 and is sprayed into the inner tub 2 through the water spray holes 41.

The clothing is at the washing in-process, and water supply installation supplies water for agitator 4, and hole for water spraying 41 sprays water to the clothing in the inner tube 2 to play the effect of soaking the clothing, improved the clothing and soaked the effect, agitator 4 can stir the water in the inner tube 2 simultaneously, makes the washing mode diversified, thereby improves clothing washing effect, and is favorable to reducing the washing time.

In some alternative examples, the water supply device includes a water supply pipe having a first end and a second end, the first end of the water supply pipe communicating with the tub 1, and the second end of the water supply pipe being connected to the pulsator 4, so that the water in the tub 1 is supplied to the pulsator 4 through the water supply pipe. Here, "connection" in "the second end of the water supply pipe is connected to the pulsator 4" should be construed broadly, and for example, the water supply pipe may or may not be physically connected to the pulsator 4, as long as water coming out from the second end of the water supply pipe can be supplied to the pulsator 4.

Therefore, water in the inner cavity of the outer barrel 1 is supplied to the stirrer 4 through the water supply pipe, so that the function of wetting clothes can be achieved, and the clothes wetting effect is improved. The water supply device is communicated with the inner cavity of the outer barrel 1, so that the washing water in the outer barrel 1 can be used for wetting clothes, an additional water source is not needed, and the water consumption is reduced. It will be appreciated that in some models where no circulation pump is provided, the first end of the water supply pipe may also be connected directly to the water supply from a water supply source, such as an external water tap, rather than using circulating water within the washing machine.

In some specific examples, the first end of the water supply pipe communicates with the bottom of the inner cavity of the tub 1. Thus, the water supply pump can pump the water at the bottom of the inner cavity of the outer tub 1 to the pulsator 4, and the water supply device can supply water to the pulsator 4 even in the washing mode of the drum washing machine 100 at the lowest water level, thereby ensuring the wetting effect and the washing effect of the drum washing machine 100 in different washing modes.

In some examples, the stirrer 4 has a water collecting cavity 42 and a water dividing channel 43 therein, the water collecting cavity 42 is communicated with a water supply device, and the water spraying holes 41 are communicated with the water collecting cavity 42 through the water dividing channel 43. Through setting up water collecting cavity 42 and water diversion channel 43 in agitator 4, make water supply installation can carry water to water collecting cavity 42 and water diversion channel 43 in, finally spray water from hole for water spraying 41 to the inner tube 2 to soak the clothing, improve the clothing and soak the effect, and then improve the washing effect.

In some examples, the surface of the stirrer 4 facing the inside of the inner cylinder 2 is provided with a plurality of ribs 44, each rib 44 extends in the radial direction of the stirrer 4 and the plurality of ribs 44 are arranged at intervals in the circumferential direction of the stirrer 4, and the water spray holes 41 are formed in the ribs 44. When the clothes are washed, the water spraying holes 41 spray water towards the inner cavity of the inner drum 2, and the ribs 44 can enable water in the inner drum 2 to generate vortex to drive the clothes to rotate and roll, so that the clothes washing effect is improved.

In some specific examples, the agitator 4 is a pulsator, i.e., the bottom of the inner tub 2 of the drum washing machine 100 is provided with a pulsator. In the clothes washing process, the clothes are continuously lifted and dropped in the inner barrel 2, and then lifted and dropped again, so that the clothes can be washed cleanly, and meanwhile, under the action of the impeller, the kneading action of the impeller on the clothes is increased on the basis of traditional beating and washing (only inner barrel rotation) of the drum washing machine 100, so that the washing effect is further improved, and the washing time is shortened.

As shown in fig. 21 and 23, in other alternative examples, the second shaft 32 has a water supply passage 320 therein, and the water supply device supplies the water in the outer tub 1 to the pulsator 4 through the water supply passage 320. The second shaft 32 has a function of transporting water by providing the water supply passage 320 in the second shaft 32, so that the washing water in the tub 1 is transported into the water supply passage 320 of the second shaft 32 by the water supply device and finally sprayed into the tub 1 from the water spray holes 41.

In some examples, an adapter 323 is disposed at an end of the second shaft 32 protruding out of the outer tub 1, and the water supply device is connected to the second shaft 32 through the adapter 323. The water supply device transports the water in the outer tub 1 into the water supply channel 320 by providing the adapter 323 at the end of the second shaft 32 protruding out of the outer tub 1 to seal the water inlet end of the water supply channel 320.

In some specific examples, the adapter 323 is sleeved outside one end of the second shaft 32, which protrudes out of the outer tub 1, and an adapter bearing 3231 is disposed between the adapter 323 and the second shaft 32, an inner ring of the adapter bearing 3231 is fixedly connected to the second shaft 32, an outer ring of the adapter bearing 3231 is fixedly connected to the adapter 323, and the adapter bearing 3231 may be two ball bearings arranged side by side, and may also be one roller bearing. Thereby, the second shaft 32 is rotatably connected to the adapter 323 by the adapter bearing 3231.

Advantageously, an end of the second shaft 32 protruding from the outer tub 1 is fitted with an adapter seal 3232, the adapter seal 3232 being further away from the axial center of the second shaft 32 than the adapter bearing 3231, the adapter seal 3232 sealing the gap between the second shaft 32 and the adapter 323.

Specifically, one end of the second shaft 32, which extends out of the outer barrel 1, is sleeved with an adapter sealing element 3232 and an adapter bearing 3231 which are distributed along the axial direction of the second shaft, the adapter sealing element 3232 is located on the outer side of the adapter bearing 3231, and the adapter sealing element 3232 is respectively in sealing connection with the second shaft 32 and the adapter 323, so that the sealing connection between the adapter 323 and the outer side wall of the second shaft 32 is ensured, and water in the water supply channel 320 of the second shaft 32 is prevented from entering the cavity 311 of the main shaft 31 to influence the normal operation of other components.

In some specific examples, a wear ring 324 is disposed in the adapter 323, the wear ring 324 is embedded inside the adapter 323, an end of the second shaft 32 extending out of the outer tub 1 extends into the wear ring 324, and the adapter bearing 3231 and the adapter seal 3232 are both sleeved on the second shaft 32 and located between an outer side wall of the second shaft 32 and the wear ring 324.

That is, wear rings 324 are positioned between adapter 323 and adapter bearing 3231 and between adapter 323 and adapter seal 3232. Through set up wear-resisting ring 324 in adapter 323, make the outer lane of adapter bearing 3231, adapter sealing member 3232 and the cooperation of wear-resisting ring 324, reduce the wearing and tearing of adapter 323 to the life of extension adapter 323.

In some examples, a shaft seal 325 is sleeved on the second shaft 32, the shaft seal 325 is disposed on the second shaft 32 and located outside the second shaft end bearing 3212, that is, the shaft seal 325 is located farther from an axial center of the second shaft 32 relative to the second shaft end bearing 3212, and the shaft seal 325 seals a gap between the second shaft 32 and the planetary gear housing 62, and prevents water in the water supply channel 320 of the second shaft 32 from entering the cavity 311 of the main shaft 31 and the planetary gear assembly 6 through the gap between the second shaft 32 and the planetary gear housing 62.

As shown in fig. 1, 21 and 23, a drum washing machine 100 according to an embodiment of the present invention includes: the outer tub 1, the inner tub 2, the main shaft 31, the second shaft 32, a driver (a motor 5 described below), the planetary gear unit 6, and the brake 7.

The outer tub 1 extends in the front-rear direction and the front end of the outer tub 1 is open, the rear wall of the outer tub 1 is provided with a mounting hole 11 penetrating in the thickness direction, and a spindle bearing seat 11 extending in the axial direction is arranged in the mounting hole 11.

The main shaft 31 extends in the front-rear direction and has a cavity 311 extending in the axial direction thereof, and the main shaft 31 is inserted into the main shaft bearing housing 11 through two main shaft bearings 314 arranged at intervals. One end (front end shown in fig. 1) of the main shaft 31 extending out of the inner surface of the rear wall of the outer tub 1 is fixedly connected with the inner cylinder bracket 201, one end (rear end shown in fig. 1) of the main shaft 31 extending out of the outer surface of the rear wall of the outer tub 1 is connected with a lock nut 313, a belt pulley 312 for mounting a belt 3121 is arranged between the lock nut 313 and the outer surface of the rear wall of the main shaft 31, and the belt pulley 312 is in transmission connection with the motor shaft 51 of the motor 5 through the belt 3121.

The inner cylinder 2 comprises an inner cylinder body 21 and an inner cylinder rear cover 22, the inner cylinder body 21 extends along the axial direction of the outer cylinder 1, two ends of the inner cylinder body are opened, the inner cylinder rear cover 22 is connected to the rear end of the inner cylinder body 21 in a sealing mode, and the inner cylinder 2 is rotatably installed in the outer cylinder 1 through an inner cylinder support 201. The inner cylinder holder 201 includes a central shaft 2011 and a holder 2012 connected to an outer side wall of the central shaft 2011, the inner cylinder 2 is supported on the holder 2012, and the central shaft 2011 is rotatably supported on a rear wall of the outer tub 1.

The second shaft 32 is inserted into the cavity 311 of the main shaft 31 through at least two second shaft bearings 3211 arranged at intervals in the axial direction thereof. Both ends of the second shaft 32 respectively extend out of both ends of the main shaft 31, one end (front end shown in fig. 1) of the second shaft 32 extending out of the main shaft 31 is matched with the planetary gear assembly 6 through a second shaft end bearing 3212, and a shaft sealing member 325 positioned outside the second shaft end bearing 3212 is further arranged between the planetary gear assembly 6 and the second shaft 31, so that the sealing connection between the planetary gear assembly 6 and the second shaft 31 is ensured. A brake disc 322 is mounted on the other end (rear end as viewed in fig. 1) of the second shaft 32, which extends out of the main shaft 31.

The stirrer 4 is rotatably provided at the bottom of the inner drum 2 and is engaged with a planetary gear unit 6 (a planetary gear housing 62 as described below).

The planetary gear assembly 6 of the drum washing machine 100 according to the embodiment of the present invention will be described in detail.

The planetary gear arrangement 6 comprises a planetary gear assembly 61, a planetary gear housing 62 and a planetary gear bearing 63. The planet wheel housing 62 has a through hole 622, the planet gear assembly 61 is arranged in the planet wheel housing 62, the planet wheel bearing 63 is arranged in the planet wheel housing 62 and on the side of the planet wheel housing 62 facing away from the through hole 622, and the planet wheel bearing 63 is arranged at the rear part in the planet wheel housing 62.

The planetary gear assembly 61 includes a planetary carrier 611, three planetary gears 612, and a planetary outer gear housing 613. The planet carrier 611 includes a planet carrier 6111 and a planet fixing disc 6116. A plurality of mounting bosses 6112 and a plurality of planet wheel mounting seats 6114 are arranged on one side of the planet wheel support 6111, the plurality of mounting bosses 6112 and the plurality of planet wheel mounting seats 6114 are alternately arranged along the circumferential direction of the planet wheel frame 611, each planet wheel mounting seat 6114 is provided with a planet wheel fixing shaft 6115, one end of each planet wheel fixing shaft 6115 is arranged in the corresponding planet wheel mounting seat 6114, and the other end of each planet wheel fixing shaft 6116 is arranged in a limit hole 6118, which is suitable for being matched, of the planet wheel fixing plate 6116 and is used for mounting the planet gear 612; each mounting boss 6112 is provided with a positioning column 6113, the planet wheel fixing disc 6116 is provided with a positioning hole 6117 matched with the positioning column 6113, and the planet wheel fixing disc 6116 is connected to the planet wheel support 6111 by welding the positioning column 6113 at the positioning hole 6117 or tightly matching the positioning column 6113 with the positioning hole 6117. Three planetary gears 612 are mounted on the planetary carrier 611 and are respectively engaged with the planetary outer gear housing 613.

A flange 6131 protruding out of the outer surface is arranged on the planet wheel outer gear shell 613 of the planet gear assembly 61, and a clamping groove 621 matched with the flange 6131 is arranged on the inner surface of the planet wheel outer gear shell 62, so that the planet wheel outer gear shell 613 is fixedly connected with the planet wheel outer gear shell 62.

The planetary gear unit 6 is rotatably engaged with the second shaft 32 via a second shaft end bearing 3212. The planetary gear unit 6 is rotatably engaged with the main shaft 31 via a planetary bearing 63. Specifically, a main shaft bushing 316 is sleeved on the main shaft 31, a main shaft flange 315 connected with the inner cylinder bracket 201 is arranged on the main shaft bushing 316, a wear-resistant bushing 642 is sleeved outside the planetary gear assembly 6, a partial sealing member 641 is arranged on the wear-resistant bushing 624, and the planetary gear assembly 6 is hermetically connected with the inner cylinder bracket 201 and the planetary gear assembly 6 is hermetically connected with the main shaft flange 315 through the partial sealing member 641.

The brake 7 of the drum washing machine 100 according to the embodiment of the present invention is described in detail as follows.

The brake 7 is provided at the rear of the outer tub 1 and includes a chute holder 71, a brake lever 72, a brake driver 73, and a brake cam 74.

The chute seat 71 is disposed on the rear wall of the tub 1 through the brake bracket 75, and the brake bracket 75 is provided with a limit chute 751 extending in the radial direction of the brake disc 322. The chute seat 71 is internally provided with a linearly extending chute 711, a circumferential positioning chute 713 and a supporting chute 714, the chute 711 is internally provided with a limit platform 712, and the chute seat 71 is also provided with a through hole 715 communicated with the chute 711.

The brake lever 72 is slidably engaged to the slide 711 between an extended position and a retracted position. The brake lever 72 includes: the slide rail comprises a slide rail matching part 721, a transmission part 722, a bridge part 723 and a braking part 724, wherein two ends of the slide rail matching part 721 are respectively connected with the transmission part 722 and the bridge part 723, and the braking part 724 is connected with one end of the bridge part 723, which is far away from the slide rail matching part 721.

The runner fitting portion 721 is slidably fitted with the runner 711, and the cross section of the runner fitting portion 721 and the minimum cross section of the runner 711 are circular in shape to be fitted to each other, the runner fitting portion 721 is provided with a plurality of axial reinforcing ribs 7211, each axial reinforcing rib 7211 extends in the axial direction of the runner fitting portion 721, and the plurality of axial reinforcing ribs 7211 are provided at intervals in the circumferential direction of the runner fitting portion 721.

The transmission portion 722 is slidably supported by the support chute 714. A limit block 720 is arranged on one side of the transmission part 722, the limit block 720 is slidably matched with the circumferential positioning sliding groove 713, the limit block 712 is arranged in the sliding groove 711 and is matched with the limit block 720 on the brake bar 72, so that the moving path of the brake bar 72 is limited, namely, the brake bar 72 can be axially limited, the brake bar 72 is prevented from sliding out of the sliding groove 711 and separating from the sliding groove seat 71, the running reliability of the brake 7 is further ensured, and a linear sliding groove 725 is arranged on the other side of the transmission part 722.

The bridge 723 is provided with a plurality of transverse beads 7231 and a plurality of longitudinal beads 7232, each transverse bead 7231 extends in the width direction of the bridge 723 and the plurality of transverse beads 7231 are disposed at intervals in the length direction of the bridge 723, each longitudinal bead 7232 extends in the length direction of the bridge 723 and the plurality of longitudinal beads 7232 are disposed at intervals in the width direction of the bridge 723, and each longitudinal bead 7232 is connected to the plurality of transverse beads 7231, respectively.

The brake portion 724 engages the brake disc 322 when the brake lever 72 is in the extended position, and the brake portion 724 disengages the brake disc 322 when the brake lever 72 is in the retracted position.

The brake cam 74 is installed at the through hole 715 of the chute seat 71 and has an eccentric column 741, the brake driver 73 is used for driving the brake cam 74 to rotate, so that the eccentric column 741 eccentrically rotates, and the eccentric column 741 is matched with the linear chute 725 on the transmission part 722, so as to drive the brake lever 72 to linearly move.

According to another embodiment of the present invention, an adapter 323 for connecting a water supply device is disposed at an end of the second shaft 32 protruding out of the rear wall of the outer tub 1, the adapter 323 is sleeved on the second shaft 32 through an adapter bearing 3231, and the second shaft 32 is further sleeved with an adapter sealing member 3232 hermetically connected to the adapter 323, and the adapter sealing member 3232 is located outside the adapter bearing 3231.

Further, the second shaft 32 has a water supply passage 320 extending in the axial direction thereof, one end of the water supply passage 320 communicates with the adapter 323, and the other end of the water supply passage 320 communicates with the agitator 4. The pulsator 4 has a sump chamber 42 for communicating with the water supply passage 320, a water diversion passage 43 defined by the rib 44, and a water spray hole 41 provided on the rib 44.

The water supply device includes a water supply pipe having a first end communicated with the outer tub 1 and a second end communicated with the water supply passage 320, and a water supply pump provided on the water supply pipe to transfer the water in the outer tub 1 to the pulsator 4 through the water supply pipe and the water supply passage 320 when the water supply pump is operated.

The operation of the drum washing machine 100 according to the embodiment of the present invention is described in detail as follows.

When the drum washing machine 100 is operated in the washing mode, the brake driver 73 drives the brake lever 72 to move to the extended position, the brake portion 724 of the brake lever 72 engages with the brake disc 322 to lock the brake disc 322, so that the second shaft 32 is fixed, since the planetary carrier 611 of the planetary gear assembly 6 is engaged with the second shaft 32 by the spline structure, the planetary carrier 611 is also fixed, and the plurality of planetary gears 612 provided on the planetary carrier 611 can only rotate.

Subsequently, when the motor 5 is operated, the belt 3121 drives the belt pulley 312 to rotate in the forward direction, so as to drive the spindle 31 and the inner cylinder 2 to rotate in the forward direction, because the spindle 31 is engaged with the plurality of planetary gears 612, the spindle 31 can simultaneously drive the plurality of planetary gears 612 to rotate during rotation, and further drive the planetary gear outer gear housing 613 to rotate in the reverse direction, and because the planetary gear outer gear housing 613 is connected with the planetary gear housing 62, and the planetary gear housing 62 is connected with the stirrer 4, the spindle 31 drives the stirrer 4 to rotate in the reverse direction through the planetary gear assembly 6.

In this process, the clothing is constantly promoted to fall down in inner tube 2, promotes again and falls down, can be clean with the clothing washing, simultaneously, under the effect of agitator 4, this application drum type washing machine increases the impeller again and rubs the effect to the friction of clothing on traditional beating and washing (only inner tube rotates) basis to further promote the washing effect, shorten the washing time.

When the pulsator 4 has the water spray holes 41, the water supply pump may supply water to the pulsator 4 through the water supply passage 320 of the second shaft 2 or through the water supply pipe, so that the water spray holes 41 spray water to the laundry in the inner tub 2, thereby playing a role of wetting the laundry, improving a laundry wetting effect, and further improving a laundry washing effect.

It will be appreciated that when drum washing machine 100 is in the washing mode, planetary gear assembly 6 transmits the forward rotation of main shaft 31 to the reverse rotation of agitator 4, and planetary gear assembly 6 is in driving connection with main shaft 31 to decelerate main shaft 31 so that the rotational speed of agitator 4 is lower than the rotational speed of main shaft 31. The terms "forward rotation" and "reverse rotation" are used herein in a relative sense and do not refer to a particular counterclockwise or clockwise direction of rotation.

When the drum washing machine 100 operates in the dehydration mode, the brake actuator 73 drives the brake lever 72 to move to the retracted position, and the brake portion 724 of the brake lever 72 releases the brake disc 322, so that the second shaft 32 is in a free state.

Subsequently, when the motor 5 drives the belt pulley 312 to rotate forward through the belt 3121, the main shaft 31 and the inner cylinder 2 can be driven to rotate forward, and then the main shaft 31 drives the planetary gear 612 to rotate, so as to drive the planetary gear housing 62 and the stirrer 4 to rotate in the same direction and at the same speed as the inner cylinder 2.

According to the drum washing machine 100 of the embodiment of the invention, by arranging the driver, the inner drum 2 is driven by the driver through the main shaft 31, the number of stages of power transmission is less, the power transmission is more direct, the inner drum 2 operates more stably, the planetary gear assembly 6 is arranged between the main shaft 31 and the stirrer 4, the torque of the main shaft 31 is transmitted to the stirrer 4 by the planetary gear assembly 6, and as the load at the stirrer 4 is far smaller than that at the inner drum 2, compared with the drum washing machine with the impeller in the related art, the load acting on the planetary gear assembly 6 is greatly reduced, the risk of damage of the planetary gear assembly 6 is greatly reduced, and the service life of the drum washing machine 100 is prolonged.

Other configurations and operations of the drum washing machine 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A planetary gear assembly for a drum washing machine, comprising:

a planetary gear assembly, the planetary gear assembly comprising:

a planet carrier;

a plurality of planetary gears rotatably mounted to the planetary carrier, respectively, the plurality of planetary gears adapted to be engaged with a main shaft for driving an inner tub to rotate in the drum washing machine, respectively;

the planet gear outer tooth shell is sleeved on the outer sides of the plurality of planet gears and is respectively meshed with the plurality of planet gears, and the planet gear outer tooth shell is suitable for being in transmission connection with a stirrer in the inner barrel.

2. The planetary gear assembly for a drum washing machine according to claim 1, wherein the plurality of planetary gears transmits the torque of the main shaft to the planetary gear housing in the same direction when the planetary carrier is allowed to rotate freely;

when the planet carrier is braked, the plurality of planet gears reversely transmit the torque of the main shaft to the planet gear outer gear shell.

3. The planetary gear assembly for a drum washing machine according to claim 2, wherein the rotation speed of the planetary gear outer gear case is less than that of the main shaft when the planetary gear carrier is braked.

4. The planetary gear assembly for a drum washing machine according to claim 2, wherein the rotation speed of the planetary gear outer gear case is equal to the rotation speed of the main shaft when the planetary gear carrier is allowed to rotate freely.

5. The planetary gear assembly for a drum washing machine according to claim 2, wherein the planetary carrier comprises:

the planet wheel support is provided with a plurality of mounting bosses, and a plurality of planet wheels are rotatably mounted on one side surface of the planet wheel support respectively;

the planet wheel fixed disk is arranged on the mounting bosses.

6. The planetary gear assembly for a drum washing machine according to claim 5, wherein the planet carrier and the planet fixed disk are both located inside the planet outer gear casing, and the planet carrier and the planet fixed disk respectively stop at both sides of the inner teeth of the planet outer gear casing to be positioned in the axial direction of the planet outer gear casing.

7. The planetary gear assembly for a drum washing machine according to claim 5, wherein the one side of the planetary gear carrier is provided with a plurality of planetary gear mounting seats and each of the planetary gear mounting seats is provided with a planetary gear fixing shaft, and a plurality of planetary gears are respectively rotatably mounted on the plurality of planetary gear fixing shafts in one-to-one correspondence.

8. The planetary gear assembly for a drum washing machine according to claim 5, wherein a plurality of the mounting bosses and a plurality of the planetary gears are alternately arranged along a circumferential direction of the planetary carrier, each of the mounting bosses is provided with a positioning column, the planetary wheel fixing disk is provided with a plurality of positioning holes, and the positioning columns on the mounting bosses are fitted in the positioning holes in a one-to-one correspondence manner.

9. A planetary gear assembly for a drum washing machine according to any one of claims 1-8, further comprising:

the planet gear assembly is arranged in the planet gear shell, and the planet gear outer gear shell is in transmission connection with the stirrer through the planet gear shell.

10. A planetary gear arrangement for a drum washing machine according to claim 9, characterized in that one of the inner peripheral wall of the planetary gear housing and the outer peripheral wall of the planetary gear housing is provided with a flange and the other is provided with a snap groove, the flange fitting within the snap groove.

11. The planetary gear assembly for a drum washing machine according to claim 10, wherein the flange is provided on an outer peripheral wall of the planetary gear outer casing and is plural, each of the flanges extends in an axial direction of the planetary gear outer casing and is provided at intervals in a circumferential direction of the planetary gear outer casing, the snap groove is provided on an inner peripheral wall of the planetary gear outer casing and is plural, each of the snap grooves extends in the axial direction of the planetary gear outer casing and is provided at intervals in the circumferential direction of the planetary gear outer casing, and the flanges are fitted in the snap grooves in a one-to-one correspondence.

12. The planetary gear assembly for a drum washing machine according to claim 9, further comprising:

the planet wheel bearing is arranged in the planet wheel shell and located on the outer side of the planet gear assembly, the inner ring sleeve of the planet wheel bearing is arranged on the main shaft and rotates along with the main shaft, and the outer ring of the planet wheel bearing is connected with the planet wheel shell and rotates along with the planet wheel shell.

13. The planetary gear assembly for a drum washing machine according to claim 9, wherein an inner circumferential surface of the planetary carrier is provided with engagement teeth adapted to engage with a second shaft inside the main shaft.

14. The planetary gear assembly for a drum washing machine according to claim 13, further comprising:

and the planet wheel shell is provided with a through hole for the second shaft to pass through, and the second shaft end bearing is arranged in the through hole and is suitable for supporting the second shaft.

15. The planetary gear assembly for a drum washing machine according to claim 14, further comprising:

and the shaft sealing element is arranged in the through hole and positioned outside the second shaft end bearing, and the shaft sealing element is suitable for sealing a gap between the second shaft and the planet wheel shell.

16. A drum washing machine characterized by comprising a planetary gear assembly for a drum washing machine according to any one of claims 1-15.