CN109667111B

CN109667111B - Drum type washing machine's stopper and drum type washing machine

Info

Publication number: CN109667111B
Application number: CN201910005373.0A
Authority: CN
Inventors: 顾超林
Original assignee: Wuxi Little Swan Electric Co Ltd
Current assignee: Wuxi Little Swan Electric Co Ltd
Priority date: 2019-01-03
Filing date: 2019-01-03
Publication date: 2022-09-23
Anticipated expiration: 2039-01-03
Also published as: CN109667111A

Abstract

The invention discloses a drum washing machine brake and a drum washing machine, wherein the brake comprises: the brake device comprises a brake rod, a brake rod and a brake device, wherein the brake rod is suitable for braking a brake disc when located at a first position, and the brake rod is suitable for releasing braking of the brake disc when located at a second position; braking the motor; a brake cam that converts a rotational motion of a motor shaft of the brake motor into a linear motion of the brake lever; the position detection assembly comprises a fixed part and a movable part, wherein the brake cam is suitable for driving the movable part to be switched between a state of being in contact with the fixed part and a state of being separated from the fixed part when moving, and when the movable part is switched to the state of being in contact with the fixed part, a signal that the brake lever is located at the first position or the second position is generated. According to the brake of the drum washing machine, the brake cam can drive the movable part to be in contact with or separate from the fixed part, so that a signal that the brake lever is located at the first position or the second position is generated, and a user can conveniently monitor the specific position of the brake lever in real time.

Description

Drum washing machine's stopper and drum washing machine

Technical Field

The invention relates to the technical field of clothes treatment equipment, in particular to a brake of a drum washing machine and the 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 washing machine in which a pulsator is provided in an inner tub has been proposed in the related art. For example, WO2016019878 discloses a washing machine capable of operating in a first drive mode, in which the drum and the rotating body are caused to rotate at different rotational speeds from each other, and in a second drive mode; the second drive mode is to rotate the drum and the rotating body together at the same rotational speed. The control part switches the driving mode in the corresponding washing mode through the clutch mechanism in the washing process or the rinsing process, so that the driving unit works in a two-axis driving mode or a one-axis driving mode. However, the structure of the clutch mechanism is complex and difficult to control, and if the inside of the brake fails, a user cannot know the failure, so that the maintenance difficulty is increased.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a brake for a drum washing machine, which can realize the mode switching of the agitator and the inner drum in cooperation, and has the advantages of simple structure, convenient control, convenient maintenance, etc.

The invention also provides a drum washing machine with the brake.

The brake of the drum washing machine according to the embodiment of the first aspect of the present invention includes: a brake lever linearly movable between a first position and a second position, the brake lever being adapted to brake a brake disc on a second shaft coupled to a planetary gear assembly in the drum washing machine when in the first position, the brake lever being adapted to release braking of the brake disc when in the second position; the brake motor is in transmission connection with the brake rod and is used for driving the brake rod to move; the brake motor is in transmission connection with the brake rod through the brake cam, and the brake cam converts the rotary motion of a motor shaft of the brake motor into the linear motion of the brake rod; the position detection assembly comprises a fixed piece and a movable piece linked with the brake cam, the brake cam is suitable for driving the movable piece to be switched between a state of being in contact with the fixed piece and a state of being separated from the fixed piece when moving, and when the movable piece is switched to the state of being in contact with the fixed piece, a signal that the brake rod is located at the first position or the second position is generated, and the brake motor is controlled to stop working.

According to the brake of the drum washing machine, the position detection assembly is arranged, and the movable member of the position detection assembly is linked with the brake cam, so that the brake cam can drive the movable member to be contacted with or separated from the fixed member in the movement process, and a signal that the brake rod is positioned at the first position or the second position is generated, so that the brake motor is controlled to stop working according to the signal, the brake rod is locked at the first position or the second position, a user can monitor the specific position of the brake rod in real time, the running state of the drum washing machine is further judged, and the normal working of the brake is prevented from being influenced by the occurrence of faults.

According to an embodiment of the present invention, the brake motor stops operating to stop the brake lever to the first position at the moment the movable member is switched to the state of being separated from the fixed member, and the brake motor stops operating to stop the brake lever to the second position at the moment the movable member is switched to the state of being in contact with the fixed member.

According to an embodiment of the present invention, the brake motor drives the brake lever to move by driving the brake cam to rotate around a fixed axis, wherein the brake cam is formed in a substantially columnar shape extending along the fixed axis, and the outer peripheral wall of the brake cam has a protrusion, and the movable member is in contact with the fixed member when a portion of the protrusion farthest from the fixed axis abuts against the movable member.

In some embodiments, the peripheral wall of the brake cam has at least a portion of a first cylindrical surface with the fixed axis as a central axis, and the protrusion protrudes from and smoothly transitions with the first cylindrical surface, wherein the moveable member is separated from the fixed member when the first cylindrical surface abuts against the moveable member.

In some examples, at least a portion of a surface of the boss forms at least a portion of a second cylindrical surface centered on the fixed axis, wherein a distance between the second cylindrical surface and the fixed axis is greater than a distance between the first cylindrical surface and the fixed axis.

According to a further embodiment of the invention, the fixed part is a stationary spring leaf and the movable part is a movable spring leaf.

In some embodiments, the brake further comprises: the support, brake motor brake cam with position detection subassembly is located the support, the one end of movable reed forms stiff end and another end and forms the free end, the free end of movable reed is located one side of brake cam.

In some examples, the free end of the movable spring plate has an abutment projection adapted to engage in abutment with the brake cam on a side facing the brake cam.

In some examples, the wall of the bracket has a positioning slot, and the static spring and the movable spring extend out of the bracket through the positioning slot to be connected with a controller of the drum washing machine.

According to a further embodiment of the invention, the brake further comprises: the brake pawl is linked with the brake rod and can be switched between a tightening state of tightly holding the brake disc and a spreading state of releasing the brake disc, when the brake rod is located at the first position, the brake pawl is switched to the tightening state, and when the brake rod is located at the second position, the brake pawl is switched to the spreading position.

In some embodiments, the brake further comprises: the brake base is provided with a slide way, the brake rod is movably matched with the slide way between a first position and a second position, and the brake pawl is arranged on the brake base.

The drum washing machine according to the second aspect embodiment of the present invention includes the brake of the 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 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 a brake of the drum washing machine according to the embodiment of the present invention, wherein a brake pawl is in a tightened state;

FIG. 14 is a partial schematic view of the brake shown in FIG. 13 in one orientation;

FIG. 15 is a cross-sectional view taken along line A-A of FIG. 14;

FIG. 16 is a cross-sectional view taken along line B-B of FIG. 14;

FIG. 17 is a cross-sectional view taken along line C-C of FIG. 14;

FIG. 18 is a partial schematic structural view of the brake shown in FIG. 14 in another orientation;

FIG. 19 is a schematic structural view of the first/second pawl portions of the brake shown in FIG. 13;

FIG. 20 is a schematic view of the actuator lever of the brake shown in FIG. 13 in one orientation;

FIG. 21 is a schematic view of the actuator lever of the brake of FIG. 13 in another orientation;

fig. 22 is a perspective view of a brake of the drum washing machine according to the embodiment of the present invention;

fig. 23 is a partial perspective view of a brake of the drum washing machine according to the embodiment of the present invention;

FIG. 24 is a perspective view of a brake and adapter of a drum washing machine according to an embodiment of the present invention;

fig. 25 is an exploded view of a brake housing of a brake of a drum washing machine according to an embodiment of the present invention;

fig. 26 is a structural schematic view of a brake cam of a brake of the drum washing machine according to the embodiment of the present invention;

fig. 27 and 28 are assembly views of the brake cam, the bracket, and the position detecting assembly according to the embodiment of the present invention, in which the movable spring plate and the stationary spring plate are in the contact state and the separated state, respectively;

FIG. 29 is a schematic view of the drum washing machine with the outer casing, inner drum and agitator removed and looking from the front to the back;

FIG. 30 is an enlarged view at I shown in FIG. 29;

FIG. 31 is a schematic structural view of the drum washing machine with the outer casing, the outer tub and the inner tub removed, from the rear to the front, according to the embodiment of the present invention;

fig. 32 is a sectional view taken along line ii-ii in fig. 31.

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 channel 320, the second shaft bearing 3211, the second shaft end bearing 3212, the brake disc 322, the gear teeth 3221, the adapter 323, the adapter bearing 3231, the shaft sealing element 325, the anti-rotation protrusion 3232, the axial clamping table 3233, the shielding cover 3234, the adapter base 3235, the adapter cover 3236, the adapter sealing ring 3237,

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 planet gear assembly 6, the planet gear assembly 61, the planet gear carrier 611, the planet gear carrier 6111, the mounting boss 6112, the positioning column 6113, the planet gear mounting seat 6114, the planet gear fixing shaft 6115, the planet gear fixing disc 6116, the positioning hole 6117, the limiting hole 6118, the planet gear 612, the planet gear outer gear shell 613, the flange 6131, the planet gear shell 62, the clamping groove 621, the through hole 622, the planet gear bearing 63, the partially-mounted sealing element 641 and the wear-resistant sleeve 642,

brake 7, brake seat 71, slide way 711, shell section 7111, bracket section 7112, first rotary column 712, second rotary column 713, main shell 714, bracket 715, positioning groove 7151, avoidance hole 716, anti-rotation groove 7161, axial hook 7162, brake bar 72, first driving inclined groove 721, second driving inclined groove 722, first limit groove 723, second limit groove 724, first guiding inclined groove 725, second guiding inclined groove 726, deflector rod 727, hooking surface 7271, mounting cavity 7272, stopping step 7273, deflector rod limit part 7274, first limit baffle 72741, second limit baffle 72742, limit concave part 7275, partition plate 7276, transmission rod 728, hook 7281, sliding block 7282, braking pressure spring 729, linear sliding groove 720, braking motor 73, braking cam 74, eccentric column 741, first claw 742, protruding part, second cylindrical surface 744, braking pawl 75, claw tooth 751, first claw 752, first claw part 752, first driving hole 7522, first driving column 757522, the brake device comprises a first guide column 7523, a first anti-falling head 7524, a second claw portion 753, a second pivot hole 7531, a second driving column 7532, a second guide column 7533, a second anti-falling head 7534, a pawl limiting portion 754, a first pawl limiting convex plate 7541, a second pawl limiting convex plate 7542, an annular boss 755, a connecting rib 7551, a brake base 76, a main base 761, a cover plate segment 762 and a brake cover plate 77. The position detecting assembly 78, the movable spring plate 781, the stop protrusion 7811, and the stationary spring plate 782.

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 reference numerals refer to the same or similar elements or elements having the same or similar functions 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.

The brake 7 of the drum washing machine 100 according to the embodiment of the present invention is described below with reference to fig. 1 to 32. As shown in fig. 1, the drum washing machine 100 includes a second shaft 32, a planetary gear assembly 6 connected to the second shaft 32, and a brake disc 322 provided on the second shaft 32.

As shown in fig. 13 to 28, the brake 7 of the drum washing machine 100 according to the embodiment of the present invention includes: a brake lever 72, a brake motor 73, a brake cam 74, and a position detection assembly 78.

The brake lever 72 is linearly movable between a first position and a second position, the brake lever 72 being adapted to brake a brake disc 322 in the drum washing machine 100 when in the first position, thereby braking the second shaft 32; the brake lever 72 is adapted to release the brake of the brake disc 322 and thus the second shaft 32 when in the second position.

The brake motor 73 is drivingly connected to the brake lever 72 for driving the brake lever 72 to move. Specifically, the brake motor 73 is drivingly connected to the brake lever 72 through a brake cam 74, and the brake cam 74 can convert the rotational movement of the motor shaft of the brake motor 73 into the linear movement of the brake lever 72.

The position detecting assembly 78 includes a fixed member and a movable member, the movable member is operatively coupled to the brake cam 74, and the brake cam 74 is adapted to drive the movable member to switch between a state of being in contact with the fixed member and a state of being separated from the fixed member when the movable member moves.

When the movable member is switched to a state of contacting with the fixed member, the fixed member is connected to the movable member, and a signal that the brake lever 72 is located at the first position or the second position is generated, so that the brake motor 73 is controlled to stop working according to the signal, the brake lever 72 is stopped at the first position or the second position, and a user can know the specific position of the brake lever 72 according to the signal, thereby determining whether the brake 7 is in a failure or not.

According to the drum washing machine 100 of the embodiment of the invention, the position detection assembly 78 is arranged, and the movable member of the position detection assembly 78 is linked with the brake cam 74, so that the brake cam 74 can drive the movable member to contact or separate from the fixed member in the rotating process, and a signal that the brake lever 72 is located at the first position or the second position is generated, so that the brake motor 73 is controlled to stop working according to the signal, and the brake lever 72 is locked at the first position or the second position, so that a user can monitor the specific position of the brake lever 72 in real time, and further judge the running state of the drum washing machine 100, and avoid the normal working of the brake 7 being affected by the occurrence of a fault.

According to an embodiment of the present invention, at the moment when the movable member is switched to the state of being separated from the fixed member, the brake motor 73 stops working, so that the brake lever 72 stays at the first position; at the moment when the movable member is switched to the state of contact with the fixed member, the brake motor 73 stops operating to position the brake lever 72 at the second position, thereby switching the plurality of operating states of the brake 7.

For example, when the brake cam 74 moves and the movable member is driven by the brake cam 74 to switch to the position contacting with the fixed member, the movable member is connected to the fixed member, so as to generate a signal that the brake lever 72 is located at the second position, and the brake motor 73 is controlled to stop working according to the signal, so as to stop the brake lever 72 at the first position, and the user can determine the specific position of the brake lever 72 according to the signal or a sound, an image, a video or other signals converted from the signal.

According to one embodiment of the present invention, the brake motor 73 may drive the brake cam 74 to rotate about a fixed axis, and the brake cam 74 may move the brake lever 72 between the first position and the second position when rotating.

The brake cam 74 is formed in a substantially cylindrical shape extending along a fixed axis, the outer peripheral wall of the brake cam 74 has a protrusion 743, when a portion of the protrusion 743 farthest from the fixed axis abuts against the movable member, the movable member contacts the fixed member, so that a position signal of the brake lever 72 is generated, and a user can determine a specific position of the brake lever 72 according to the position signal or a signal such as a sound, an image, or a video converted from the position signal.

As shown in fig. 26 to 28, in some embodiments, the outer peripheral wall of the brake cam 74 has a portion of a first cylindrical surface 742 with a fixed axis as a central axis, the protrusion 743 protrudes from the first cylindrical surface 742 and is in smooth transition with the first cylindrical surface 742, that is, the distance between the protrusion 743 and the fixed axis is greater than the distance between the first cylindrical surface 742 and the fixed axis, the brake cam 74 is driven by the brake motor 73 to rotate, at the same time, the moveable element is in sliding fit with the side peripheral wall of the brake cam 74, when the brake cam 74 rotates to a state where the first cylindrical surface 742 abuts against the moveable element, the moveable element is separated from the fixed element, when the brake cam 74 rotates to a state where the protrusion 743 abuts against the moveable element, the moveable element is in contact with the fixed element, thereby the moveable element is driven by the shape jump of the rotating brake cam 74 to realize the switching of different states, the structure is simple and easy to realize.

In some examples, at least a portion of the surface of the protrusion 743 forms at least a portion of a second cylindrical surface 744 having a fixed axis as a central axis, wherein a distance between the second cylindrical surface 744 and the fixed axis is greater than a distance between the first cylindrical surface 742 and the fixed axis, and the first cylindrical surface 742 is in smooth transition connection with the second cylindrical surface 744, so as to prevent the brake cam 74 from being stuck to the mover during rotation, and ensure that a side peripheral wall of the brake cam 74 can always be in sliding fit with the mover and the smoothness of sliding, thereby ensuring the normal operation of the brake 7.

As shown in fig. 26 and 27, according to a further embodiment of the present invention, the stationary member is a stationary spring plate 782 and the movable member is a movable spring plate 781. The brake cam 74 is in sliding fit with the movable spring plate 781 when rotating, so that the movable spring plate 781 is driven to be switched between a state of being in contact with the static spring plate 782 and a state of being separated from the static spring plate 782, when the brake cam 74 drives the movable spring plate 781 to be in contact with the static spring plate 782, the movable spring plate 781 and the static spring plate 782 are communicated, an electric signal is generated, a user can judge the specific position of the brake lever 72 according to signals such as sound, images and videos converted by the electric signal, and real-time monitoring of the position of the brake lever 72 is achieved.

In some embodiments, the brake 7 further includes a support 715, the brake motor 73, the brake cam 74 and the position detection component 78 are disposed on the support 715, one end of the movable reed 781 forms a fixed end and the other end forms a free end, the free end of the movable reed 781 is located on one side of the brake cam 74, the brake cam 74 is in a rotating process, the outer peripheral wall of the brake cam 74 is in sliding fit with the free end of the movable reed 781, and when the brake cam 74 rotates to a position where the protruding portion 743 abuts against the free end of the movable reed 781, the free end of the movable reed 781 abuts against the static reed 782, so that the two are conducted.

In some examples, the free end of the movable spring plate 781 has an abutment projection 7811 on a side facing the detent cam 74, the abutment projection 7811 being adapted to engage in abutment with the detent cam 74.

Specifically, during the rotation of the brake cam 74, the outer peripheral wall of the brake cam 74 is in sliding fit with the stop protrusion 7811 of the movable spring plate 781, and when the brake cam 74 rotates to a position where the protrusion 743 is stopped against the stop protrusion 7811, the free end of the movable spring plate 781 abuts against the stationary spring plate 782. The abutting convex part 7811 is arranged on one side of the free end of the movable spring plate 781 facing the brake cam 74, so that the brake cam 74 is matched with the movable spring plate 781, and the normal operation of the brake 7 is further ensured.

In some examples, the wall of the bracket 715 has a positioning groove 7151, and the stationary spring 782 and the movable spring 781 protrude out of the bracket 715 through the positioning groove 7151 to be connected with a controller of the drum washing machine 100, so that when the stationary spring 782 is connected with the movable spring 781, an electrical signal generated is communicated with the controller. The positioning groove 7151 can be used for positioning the static spring piece 782 and the movable spring piece 781 and is beneficial to connection of the static spring piece 782 and the movable spring piece 781 with a controller, so that signal transmission is realized.

According to an embodiment of the present invention, the brake 7 further includes a brake pawl 75, the brake pawl 75 is linked with the brake lever 72 and is switched between a tightened state of clasping the brake disc 322 and a spread state of releasing the brake disc 322, the brake lever 72 is located at the first position to switch the brake pawl 75 to the tightened state, thereby braking the brake disc 322; when the brake lever 72 is in the second position, the brake pawls 75 are switched to the extended position, and the brake of the brake disk 322 is released.

In some embodiments, the brake 7 further comprises a brake base 71, the brake base 71 is provided with a slide 711, the brake lever 72 is movably fitted to the slide 711 between the first position and the second position, and the brake pawl 75 is provided on the brake base 71. The brake base 71 can be used as a mounting member for the brake lever 72 and the pawl, and can limit the position of the brake lever 72, thereby realizing the above-described function of the brake 7.

In some examples, the brake pawl 75 includes a first pawl portion 752 and a second pawl portion 753, one end of the first pawl portion 752 is pivotally mounted to the brake holder 71, one end of the second pawl portion 753 is pivotally mounted to the brake holder 71, and when the brake pawl 75 is in the tightened state, the other end of the first pawl portion 752 and the other end of the second pawl portion 753 are close to each other, so that the first pawl portion 752 and the second pawl portion 753 can clasp the brake disk 322, and when the brake pawl 75 is in the spread state, the other end of the first pawl portion 752 and the other end of the second pawl portion 753 are away from each other, so that the first pawl portion 752 and the second pawl portion 753 can release the brake disk 322, and the structure is simple and easy to implement.

The drum washing machine 100 according to the embodiment of the present invention includes the brake 7 of the drum washing machine 100 according to the above-described embodiment. Since the brake 7 of the drum washing machine 100 according to the embodiment of the present invention has the above technical effects, the drum washing machine 100 according to the embodiment of the present invention also has the above technical effects, that is, when the drum washing machine 100 is in operation, a user can monitor the specific position of the brake lever 72 in real time, and further determine the operation state of the drum washing machine 100, so as to avoid the normal operation of the brake 7 being affected by the occurrence of a fault.

Some embodiments of the drum washing machine 100 according to the present invention will be described in detail with reference to fig. 1 to 32.

As shown in fig. 1, a drum washing machine 100 according to an embodiment of the present invention includes an outer tub 1, an inner tub 2, a main shaft 31, a second shaft 32, a driver (e.g., a motor 5 described below), a planetary gear assembly 6, and a 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 12 extending in the axial direction of the mounting hole 11 is provided therein.

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 12 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.

As shown in fig. 2 and 3, the inner cylinder 2 includes an inner cylinder 21 and an inner cylinder rear cover 22, the inner cylinder 21 extends along the axial direction of the outer cylinder 1, and both ends of the inner cylinder are open, the inner cylinder rear cover 22 is hermetically connected to the rear end of the inner cylinder 21, and the inner cylinder 2 is rotatably mounted in the outer cylinder 1 through an inner cylinder bracket 201. The inner cylinder holder 201 includes a center shaft portion 2011 and a holder portion 2012 connected to an outer side wall of the center shaft portion 2011, the inner cylinder 2 is supported on the holder portion 2012, and the center shaft portion 2011 is rotatably supported on a rear wall of the outer tub 1.

As shown in fig. 3, the second shaft 32 is inserted into the cavity 311 of the main shaft 31 through at least two second shaft bearings 3211 spaced along the axial direction of the second shaft. Two ends of the second shaft 32 respectively extend out of two 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. The other end (rear end as shown in fig. 1) of the second shaft 32, which extends out of the main shaft 31, is mounted with a brake disc 322.

The agitator 4 is rotatably provided at the bottom of the inner cylinder 2 and engaged with the planetary gear assembly 6.

The planetary gear assembly 6 of the drum washing machine 100 according to the embodiment of the present invention will be described in detail with reference to fig. 4 to 11.

As shown in fig. 6 and 7, the planetary gear assembly 6 includes 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 in the planet wheel housing 62.

As shown in fig. 8-11, the planetary gear assembly 61 includes a planet carrier 611, a plurality of planet gears 612, and a planet 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 the planet wheel fixing shaft 6115 is arranged in the planet wheel mounting seat 6114, and the other end of the planet wheel fixing shaft 6116 is arranged in a limit hole 6118, which is suitable for being matched, 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.

A plurality of planetary gears 612 are rotatably mounted on 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 inner peripheral wall of the planetary gear housing 613 has meshing teeth that mesh with the plurality of planetary gears 612, so that the planetary gear housing 613 meshes with the plurality of planetary gears 612, respectively, and the planetary gear housing 613 is in transmission connection with the agitator 4. Furthermore, a plurality of flanges 6131 protruding from the outer surface are arranged on the planet wheel outer gear shell 613, and a clamping groove 621 matched with the flanges 6131 is arranged on the inner surface of the planet wheel outer gear shell 62, so that the planet wheel outer gear shell 613 and the planet wheel outer gear shell 62 are fixedly connected.

The planet wheel bearing 63 is arranged in the planet wheel housing 62 and located on the outer side of the planet wheel assembly 61, the inner ring of the planet wheel bearing 63 is sleeved on the main shaft 31 and rotates along with the main shaft 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 ensured to rotate relative to the main shaft 31 by arranging the planet wheel bearing 63.

The planetary gear assembly 6 is rotatably engaged with the second shaft 32 through a second shaft end bearing 3212. The planetary gear assembly 6 is rotatably engaged with the main shaft 31 by a planetary bearing 63. Specifically, as shown in fig. 4 and 5, a main shaft sleeve 316 is sleeved on the main shaft 31, a main shaft flange 315 connected to the inner cylinder bracket 201 is provided on the main shaft sleeve 316, a wear-resistant sleeve 642 is sleeved outside the planetary gear assembly 6, a partial sealing member 641 is provided on the wear-resistant sleeve 624, and the planetary gear assembly 6 and the inner cylinder bracket 201 and the planetary gear assembly 6 and the main shaft flange 315 are hermetically connected through the partial sealing member 641.

When the planetary carrier 611 is allowed to rotate freely, the plurality of planetary gears 612 transmit the torque of the main shaft to the planetary gear housing 613 in the same direction by revolution. When planetary carrier 611 is braked, plurality of pinion gears 612 rotate to transmit torque of main shaft 31 in the reverse direction to pinion 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 switching of the state of the planetary carrier 611 of the planetary gear assembly 6 in combination with the mode in which the drum washing machine 100 is currently operated is not limited to the above-described embodiment, and may be performed in any one of the dehydration and washing modes while combining the free rotation state and the braking state of the planetary carrier 611. 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, the planet gear case 613 has a rotational speed equal to the rotational speed of the main shaft 31 when the planet gear carrier 611 is allowed to rotate freely. 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.

The brake 7 of the drum washing machine 100 according to the embodiment of the present invention will be described in detail with reference to fig. 12 to 28.

As shown in fig. 12 and 13, the brake 7 is provided at the rear of the outer tub 1 and includes a brake disc 322, a brake holder 71, a brake lever 72, a brake motor 73, a brake cam 74, a brake pawl 75, and a position detecting assembly.

The brake disc 322 is coupled to the second shaft 32 and is interlocked with the planetary gear assembly 6 through the second shaft 32, and gear teeth 3221 are provided on an outer circumferential surface of the brake disc 322.

The stopper seat 71 is mounted on the rear wall of the tub 1 and has a slide 711. The brake base 71 includes a brake base 76 and a brake cover 77, the brake base 76 includes a main base 761 and a bracket 715, the bracket 715 and the brake cover 77 are detachably mounted to the main base 761, the brake pawl 75 is mounted to the main base 761 and the brake motor 73 is mounted to the bracket 715. A first pivot post 712 and a second pivot post 713 are provided in the brake base 76. In some examples, brake shoe 71 includes a main housing 714 and a bracket 715, with bracket 715 being removably mounted to main housing 714. The skid 711 comprises a casing section 7111 and a bracket section 7112 spaced apart from each other, the casing section 7111 being formed at the main housing 714 and the bracket section 7112 being formed at the bracket 715.

The brake lever 72 is slidably fitted to the slide 711 between the extended position and the retracted position, and the brake lever 72 is interlocked with the brake pawl 75, and acts on the brake pawl 75 when the brake lever 72 is in the extended position and switches the brake pawl 75 to the tightened state to clasp the brake disk 322. The brake lever 72 acts on the brake pawl 75 when in the retracted position and switches the brake pawl 75 to the extended state to release the brake disc 322.

Specifically, the brake lever 72 is provided with a first driving oblique slot 721, a second driving oblique slot 722, a first limit groove 723 and a second limit groove 724. The first drive diagonal slot 721 and the second drive diagonal slot 722 are respectively disposed obliquely with respect to the sliding direction of the brake lever 72, an end of the first drive diagonal slot 721 adjacent to the brake disc 322 and an end of the second drive diagonal slot 722 adjacent to the brake disc 322 are distant from each other, and an end of the first drive diagonal slot 721 distant from the brake disc 322 and an end of the second drive diagonal slot 722 are close to each other, where close to and distant from each other are relative terms, i.e., a distance between the ends of the first drive diagonal slot 721 and the second drive diagonal slot 722 adjacent to the brake disc 322 is larger than a distance between the ends of the first drive diagonal slot 721 and the second drive diagonal slot 722 distant from the brake disc 322. Further, the first and second limiting

grooves

723 and 724 are respectively parallel to the sliding direction of the brake lever 72, the first limiting groove 723 is communicated with one end of the first driving oblique slot 721 away from the brake disc 322, the first limiting groove 723 extends from the first driving oblique slot 721 in a direction away from the brake disc 322, the second limiting groove 724 is communicated with one end of the second driving oblique slot 722 away from the brake disc 322, and the second limiting groove 724 extends from the second driving oblique slot 722 in a direction away from the brake disc 322.

Brake lever 72 includes a lever 727, a drive link 728, and a brake compression spring 729 compressed between lever 727 and drive link 728. The deflector 727 is slidably fitted to the housing section 7111 of the slide 711 and is linked with the detent pawl 75, and the first driving inclined slot 721, the second driving inclined slot 722, the first limiting groove 723 and the second limiting groove 724 are all disposed on the deflector 727. The rod 727 is provided with a hooking surface 7271 facing the brake disc 322 and an installation cavity 7272, the opening of the installation cavity 7272 faces the transmission rod 728, and a stopping step 7273 is arranged in the installation cavity 7272.

A drive rod 728 is slidably engaged with the bracket section 7112 of the slide 711 and is drivingly connected to the brake motor 73. The transmission rod 728 is provided with a hook 7281, the hook 7281 is hooked on a hook fine dried surface 7271, namely the transmission rod 728 is hooked on a deflector rod 727. The drive rod 728 is also provided with a slide block 7282, the shape of the cross-section of the slide block 7282 being adapted to the shape of the cross-section of the slide 711 to improve the smoothness of the sliding movement of the drive rod 728 within the slide 711.

The brake pressure spring 729 is sleeved on the transmission rod 728, the brake pressure spring 729 and the transmission rod 728 extend into the installation cavity 7272, one end of the brake pressure spring 729 abuts against the stopping step 7273, and the other end of the brake pressure spring 729 abuts against the sliding block 7282, so that the installation and the positioning of the brake pressure spring 729 are realized.

The brake motor 73 may be mounted to a bracket 715 of the brake base 71, and the brake motor 73 is drivingly connected to the brake lever 72 via the brake cam 74 to drive the brake lever 72 between the extended position and the retracted position.

The brake cam 74 is mounted on the brake base 71 and has an eccentric post 741, the brake cam 74 is driven by the brake motor 73 to rotate, so that the eccentric post 741 eccentrically rotates, and the eccentric post 741 engages with the linear slide slot 720 of the transmission rod 728, thereby driving the brake lever 72 to linearly move.

The brake pawl 75 is provided in the main housing 714 of the brake holder 71 and includes a first pawl portion 752 and a second pawl portion 753. One end of the first claw portion 752 is provided with a first pivot hole 7521 pivotally sleeved on the first rotary column 712, so that one end of the first claw portion 752 is pivotally mounted on the brake base 71, the other end of the first claw portion 752 is provided with a first driving column 7522, and the first driving column 7522 is slidably fitted to the first driving inclined groove 721. A first guide post 7523 is provided between both ends of the first claw portion 752, and the first guide post 7523 is slidably fitted to the first guide chute 725. A first anti-slip head 7524 is provided at an end of the first guide post 7523 to prevent the first guide post 7523 from slipping out of the first guide chute 725.

One end of the second claw portion 753 is provided with a second pivot hole 7531 pivotally fitted over the second rotating column 713, so that one end of the second claw portion 753 is pivotally mounted to the brake holder 71, and the other end of the second claw portion 753 is provided with a second driving column 7532, the second driving column 7532 being slidably fitted to the second driving chute 722. A second guide column 7533 is provided between both ends of the second claw portion 753, and the second guide column 7533 is slidably fitted to the second guide inclined groove 726. The second guide column 7533 has a second anti-separation head 7534 at an end thereof to prevent the second guide column 7533 from being separated from the second guide chute 726.

Each of the first drive column 7522 and the second drive column 7532 has an annular boss 755 surrounding it, the height of the annular boss 755 surrounding the first drive column 7522 is lower than the height of the first drive column 7522, and the inner peripheral wall of the annular boss 755 surrounding the first drive column 7522 is connected with the outer peripheral wall of the second drive column 7532 by a plurality of connecting ribs 7551, the height of the annular boss 755 surrounding the second drive column 7532 is lower than the height of the second drive column, and the inner peripheral wall of the annular boss 755 surrounding the second drive column 7532 is connected with the outer peripheral wall of the second drive column 7532 by a plurality of connecting ribs 7551, thereby improving the structural strength of the drive columns and prolonging the service life of the drive columns.

The brake pawl 75 is switchable between a tightened state of clasping the brake disk 322 and a spread state of releasing the brake disk 322, and when the brake pawl 75 is in the tightened state, the other end of the first claw portion 752 and the other end of the second claw portion 753 are close to each other, and the claw teeth 751 are engaged with the gear teeth 3221, so that the first claw portion 752 and the second claw portion 753 clasp the brake disk 322, and the brake disk 322 is braked; when the other end of the first claw portion 752 and the other end of the second claw portion 753 are moved away from each other when the brake pawls 75 are in the deployed state, the claw teeth 751 are disengaged from the gear teeth 3221, so that the first claw portion 752 and the second claw portion 753 release the brake disk 322, allowing the brake disk 322 to rotate freely.

26-28, the position sensing assembly 78 includes a stationary member and a moveable member, and the brake cam 74, when moved, is adapted to actuate the moveable member between a state in contact with the stationary member and a state disengaged from the stationary member. Wherein, when the movable member is switched to the state of contacting with the fixed member, a signal that the brake lever 72 is located at the second position is generated; when the movable member is switched to the state of being separated from the fixed member, the brake lever 72 is located at the first position.

In some specific examples, because the instant torque force of the brake pawl 75 clasping the brake disc 322 is large, which easily causes the brake pawl 75 to disengage from the brake lever 72, and thus causes the whole brake 7 to fail, the pawl limiting portion 754 is disposed on the brake pawl 75, the lifting lever limiting portion 7274 is disposed on the lifting lever, when the brake lever 72 is located at the extended position, the brake pawl 75 is switched to the tightened state, the lifting lever limiting portion 7274 cooperates with the pawl limiting portion 754, which can ensure the effectiveness of the brake pawl 75 in the tightened state, when the brake lever 72 is located at the retracted position, the brake pawl 75 is switched to the extended position, and the lifting lever limiting portion 7274 disengages from the pawl limiting portion 754.

The pawl limit portion 754 is formed as a limit protruding plate and includes a first pawl limit protruding plate 7541 provided at the other end of the first pawl portion 752 and a second pawl limit protruding plate 7542 provided at the other end of the second pawl portion 753. Each of the limit projections protrudes from the outer surface of the detent pawl 75. The dog stopper 7274 is formed as a stopper and is located on one side of the first driving slanting groove 721 and the second driving slanting groove 722 in the depth direction, i.e., in the axial direction of the first driving column 7522 and the second driving column 7532, and the dog stopper 7274 is located on one side of the first driving slanting groove 721 and the second driving slanting groove 722, each of which defines a stopper recess 7275 with the brake lever 72.

The orthographic projection of the deflector rod limiting part 7274 on the plane of the first driving inclined groove 721 and the second driving inclined groove 722 is positioned on one side, far away from the brake disc 322, of the first driving inclined groove 721 and the second driving inclined groove 722, so that when the brake pawl 75 is switched to the tightening state, the first pawl limiting convex plate 7541 and the second pawl limiting convex plate 7542 can be well matched with the deflector rod limiting part 7274, and when the brake pawl is switched to the unfolding state, the first pawl limiting convex plate 7541 and the second pawl limiting convex plate 7542 can be well separated from the deflector rod limiting part 7274.

When the brake lever 72 is located at the extended position, the brake pawl 75 is switched to the tightened state, and at this time, the limit protruding plate on the brake pawl 75 extends into the limit concave portion 7275 and is stopped by the limit baffle on the brake lever 72, so as to prevent the limit protruding plate from being separated from the limit concave portion 7275, thereby ensuring the reliability of the engagement of the brake pawl 75 with the brake lever 72, i.e., ensuring the validity of the brake pawl 75 in the tightened state, and further ensuring the normal operation of the brake 7. When the brake lever 72 is moved from the extended position to the retracted position, the limit stopper of the brake lever 72 is gradually moved in a direction away from the limit projection of the brake pawl 75, so that the limit stopper is disengaged from the limit projection.

According to another embodiment of the present invention, an adapter 323 for connecting a water supply device is disposed at one end of the second shaft 32 protruding out of the rear wall of the outer tub 1, an adapter 3235 of the adapter 323 is sleeved on the second shaft 32 through an adapter bearing 3231, and the second shaft 32 is further sleeved with a joint sealing ring 3237, wherein the joint sealing ring 3237 is located outside the adapter bearing 3231.

The main housing 714 has an avoiding hole 716, the second shaft 32 passes through the avoiding hole 716, and the adapter 323 is fitted in the avoiding hole 716 and located outside the brake disc 322, so that the adapter 323 can be installed and positioned by using the avoiding hole 716 of the brake base 71. Specifically, an inner peripheral surface of the avoiding hole 716 is provided with an anti-rotation groove 7161, an outer peripheral surface of the adapter 323 is provided with an anti-rotation protrusion 3232, and the anti-rotation protrusion 3232 is matched with the anti-rotation groove 7161, so that the adapter 323 is limited in the circumferential direction of the adapter 323, and the adapter 323 is prevented from rotating in the avoiding hole 716.

The adapter 323 is provided with a shielding cover 3234 for shielding the axial clamping platforms 3233 and the axial hooks 7162, and the number of the shielding covers 3234 is consistent with that of the axial clamping platforms 3233, and the positions of the shielding covers are in one-to-one correspondence.

In some embodiments of the invention, as shown in fig. 24 and 32, to facilitate the removal of the adapter 323, the adapter 323 includes an adapter 3235 and an adapter cover 3236. The adapter 3235 is sleeved on one end of the second shaft 32 extending out of the outer tub 1 through an adapter bearing 3231. The adaptor cover 3236 is detachably mounted to the adaptor 3235 and connected to the water supply device. Each of the rotation preventing projections 3232 is formed of two parts, one part being formed on the adapter 3235 and the other part being formed on the adapter cover 3236. The axial boss 3233 is formed on an adapter 3235, and the shielding cap 3234 is formed on an adapter cap 3236.

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 pulsator 4. The pulsator 4 has a sump chamber 42 for communicating with the water supply passage 320, a water distribution passage 43 defined by the rib 44, and water spray holes 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 operates in the washing mode, the brake motor 73 drives the brake lever 72 to move to the extended position, the brake pawl 75 is switched to the tightened state, and the brake disc 322 is tightly held to lock the brake disc 322, so that the second shaft 32 is fixed, and since the carrier 611 of the planetary gear assembly 6 is engaged with the second shaft 32 by the spline structure, the carrier 611 is also fixed, and the plurality of planetary gears 612 provided on the carrier 611 can only rotate. Subsequently, when the motor 5 is operated, the belt pulley 312 is driven by the belt 3121 to rotate in the forward direction, so as to drive the main shaft 31 and the inner cylinder 2 to rotate in the forward direction, because the main shaft 31 is engaged with the plurality of planetary gears 612, the main shaft 31 can simultaneously drive the plurality of planetary gears 612 to rotate when rotating, so as to 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 main shaft 31 drives the stirrer 4 to rotate in the reverse direction through the planetary gear assembly 6.

This process, the clothing is constantly promoted in inner tube 2 and is fallen down, 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 rubbing effect of impeller pair clothing again on traditional beating and washing (only the 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 motor 73 drives the brake lever 72 to move to the retracted position, the brake pawl 75 is switched to the extended state, and the brake disc 322 is released to release the brake disc 322, so that the second shaft 32 is in the 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 assembly 61 to rotate in the same direction, 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.

In the description of the present invention, it is to be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "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 device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

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 brake of a drum washing machine, characterized by comprising:

a brake lever linearly movable between a first position and a second position, the brake lever being adapted to brake a brake disc on a second shaft coupled to a planetary gear assembly in the drum washing machine when in the first position, the brake lever being adapted to release braking of the brake disc when in the second position;

the brake motor is in transmission connection with the brake rod and is used for driving the brake rod to move;

the brake motor is in transmission connection with the brake rod through the brake cam, and the brake cam converts the rotary motion of a motor shaft of the brake motor into the linear motion of the brake rod;

the position detection assembly comprises a fixed piece and a movable piece linked with the brake cam, the brake cam is suitable for driving the movable piece to switch between a state of contacting with the fixed piece and a state of separating from the fixed piece when moving,

when the movable piece is switched to a state of being in contact with the fixed piece, a signal that the brake lever is located at the first position or the second position is generated, and the brake motor is controlled to stop working;

at the moment when the movable member is switched to a state of being separated from the fixed member, the brake motor stops working to stop the brake lever to the first position, and at the moment when the movable member is switched to a state of being in contact with the fixed member, the brake motor stops working to stop the brake lever to the second position;

a brake pawl which is linked with the brake lever and is switchable between a tightened state of clasping the brake disc and a spread state of releasing the brake disc,

when the brake lever is located at the first position, the brake pawl is switched to the tightened state, when the brake lever is located at the second position, the brake pawl is switched to the unfolded state, the brake motor drives the brake cam to rotate around a fixed axis to drive the brake lever to move, the brake cam is approximately formed into a column shape extending along the fixed axis, the peripheral wall of the brake cam is provided with a protruding portion, and when the portion, farthest from the fixed axis, of the protruding portion abuts against the movable member, the movable member is in contact with the fixed member.

2. A brake for a drum washing machine according to claim 1, characterized in that the outer peripheral wall of the brake cam has at least a portion of a first cylindrical surface with the fixed axis as a central axis, the boss protrudes from and smoothly transitions with the first cylindrical surface,

when the first cylindrical surface abuts against the movable piece, the movable piece is separated from the fixed piece.

3. A brake for a drum washing machine according to claim 2, characterized in that at least a part of the surface of the boss forms at least a part of a second cylindrical surface having the fixed axis as a central axis,

wherein a distance between the second cylindrical surface and the fixed axis is greater than a distance between the first cylindrical surface and the fixed axis.

4. A drum washing machine brake according to any one of claims 1-3, characterized in that the fixed member is a stationary spring and the movable member is a movable spring.

5. The brake of the drum washing machine according to claim 4, further comprising:

the support, brake motor brake cam with position detection subassembly is located the support, the one end of movable reed forms stiff end and another end and forms the free end, the free end of movable reed is located one side of brake cam.

6. A drum washing machine brake according to claim 5, characterized in that the side of the free end of the movable spring plate facing the brake cam has an abutment protrusion adapted to engage the brake cam in an abutment manner.

7. A brake for drum washing machine according to claim 6, characterized in that the wall of the bracket has a positioning slot through which the static spring leaf and the movable spring leaf protrude out of the bracket to connect with the controller of the drum washing machine.

8. The brake of the drum washing machine according to claim 1, further comprising:

the brake base is provided with a slide way, the brake rod is movably matched with the slide way between a first position and a second position, and the brake pawl is arranged on the brake base.

9. A drum washing machine characterized by comprising a brake of a drum washing machine according to any one of claims 1-8.