CN112281406A

CN112281406A - Washing machine and sliding potentiometer monitoring circuit

Info

Publication number: CN112281406A
Application number: CN202011187374.0A
Authority: CN
Inventors: 伊茂聪; 刘彦峰; 惠浩然; 柳宗超
Original assignee: Hisense Shandong Refrigerator Co Ltd
Current assignee: Hisense Shandong Refrigerator Co Ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-01-29

Abstract

The invention relates to the technical field of washing machines, and discloses a washing machine and a sliding potentiometer monitoring circuit, wherein the washing machine comprises: the clutch is arranged in the box body, and the clutch is connected with a deflector rod; an outer tub disposed in the case; an inner tub disposed in the outer tub; further comprising: the tractor, set up in the box, be used for drawing the driving lever is in order to switch washing machine's operating condition, the tractor includes: and the sliding potentiometer monitoring circuit is used for monitoring the tractor in real time and determining the moving distance of the driving lever, so that the tractor is controllable in traction length, high in traction precision and simple and reliable in structure.

Description

Washing machine and sliding potentiometer monitoring circuit

Technical Field

The invention relates to the technical field of washing machines, in particular to a washing machine and a sliding potentiometer monitoring circuit.

Background

Washing machines are cleaning appliances which utilize electric energy to generate mechanical action to wash clothes, more and more people use washing machines to wash clothes, bedding and other large articles, time and labor are saved, and the washing machines are becoming essential household appliances in people's life. Among them, the retractor is an important part for switching the operation state of the washing machine.

The currently commonly used retractor has the following characteristics: 1. the single-stroke tractor has a single stroke, keeps tension when the tractor is powered on, disappears tension when the tractor is powered off, cancels the traction, and has the most basic tractor with a small motor and a transmission gear which are matched to move inside, so the application range is single; 2. the contact type multi-stroke tractor has a plurality of traction strokes, a plurality of input ends respectively control the plurality of strokes, the traction is cancelled when the tension is kept after electrification and the tension disappears at the moment of power failure, a small motor, a transmission gear and a plurality of contacts are arranged inside the contact type multi-stroke tractor, and the current traction stroke is judged through the contacts; the input ends are influenced by strokes more, the more the input ends are, the more the structure is complex, the worse the reliability is, the traction force disappears during power failure, the traction force is quickly restored to the initial position, and the traction device is not suitable for the situations needing slow restoration, and a double-stroke tractor is commonly used; 3. the cam type multi-stroke tractor comprises a plurality of traction strokes, two input ends and a zero-crossing detection end, wherein an electrified motor is used for carrying out unidirectional traction, power-off traction is kept, an initial position is detected through the zero-crossing, and the traction position is judged through traction time; the tractor is greatly influenced by traction load, the traction speed is low under the condition of large load, the traction speed is high under the condition of small load, and the traction distance error is large due to the influence of the precision of the tractor, and meanwhile, the tractor cannot be detected when the tractor is not pulled or is excessively large or small.

Disclosure of Invention

In some embodiments of the present application, there are provided a washing machine including a cabinet, an outer tub, an inner tub, and a retractor for switching an operating state of the washing machine, and the retractor includes a sliding potentiometer monitoring circuit, so that a traction distance is controllable and a traction mechanism is simple.

In some embodiments of the application, slip potentiometre monitoring circuitry has been add, add the cam structure in the tractor, the cam drives load (driving lever) traction movement when rotating, the cam structure drives the gleitbretter and moves on the slip potentiometre simultaneously, convert the distance of pulling into gleitbretter displacement distance, when moving on the slip potentiometre through the gleitbretter, change the position on the slip potentiometre, thereby the resistance of slip potentiometre also changes, convert the distance of pulling into the resistance value, and reach the purpose of real-time detection distance of pulling through detection output resistance value to the controller.

In some embodiments of the application, the working form of the tractor is improved, the controller is connected to the traction motor to control the traction motor to pull the shifting rod to move, and when the traction motor stops rotating, the traction motor is controlled to keep the rotation stopping position.

In some embodiments of the present application, the washing machine further comprises: and the fixed carrier is connected with the outer barrel, and the middle part of the shifting lever is rotationally connected with the fixed carrier so as to limit the position of the shifting lever.

In some embodiments of the present application, a clutch in a washing machine includes: the shifting end of the shifting lever is abutted to the connecting sleeve so as to convert the traction power of the shifting lever into the moving power of the connecting sleeve.

In some embodiments of the present application, the retractor retracts a retraction end of the lever to restrict the lever from rotating around a connection of the lever and the fixed carrier, and the retraction end of the lever compresses the connection sleeve to move from a transmission position to a locking position to switch the washing machine from a dehydration state to a washing state.

In some embodiments of the present application, the retractor comprises: the shell is connected to the bottom of the outer barrel so as to accommodate a traction motor, a traction wheel and a transmission part; the traction wheel is provided with a traction shaft, the traction shaft is connected with a traction rope, the traction rope is connected to the shifting rod, and the traction wheel is rotationally arranged on the shell to draw the shifting rod to move; the traction motor is arranged on the shell, a motor shaft of the traction motor penetrates into the shell, and the traction motor is used for providing traction torque for the tractor; the transmission part is arranged between the traction wheel and the traction motor so as to transmit the output torque of the traction motor to the traction wheel.

In some embodiments of the present application, a sliding potentiometer monitoring circuit is further provided, and is applied to the washing machine described above, wherein the sliding potentiometer monitoring circuit is configured to monitor a distance that the shifting lever is dragged by the tractor in real time.

In some embodiments of the present application, the sliding potentiometer monitoring circuit comprises: the device comprises a cam, a sliding potentiometer, a sliding sheet and a detection output end, wherein the cam is connected to a traction wheel so as to enable the cam and the traction wheel to synchronously rotate; the sliding potentiometer is arranged on the shell; one end of the sliding piece is slidably arranged on the sliding potentiometer to change the resistance value of the sliding potentiometer, and the other end of the sliding piece is abutted to the cam; the detection output end is electrically connected with the sliding potentiometer to output the resistance value variable quantity of the sliding potentiometer.

In some embodiments of the present application, the distance from each point on the profile of the cam to the center of rotation of the cam is different.

In some embodiments of the present application, the rotating cam abuts against the sliding piece to move to different positions of the sliding potentiometer, so as to convert the moving distance of the shift lever into the resistance value variation of the sliding potentiometer.

In some embodiments of the present application, the traction motor and the detection output are both connected to the controller, the controller is configured to determine a resistance variation of the sliding potentiometer in real time, and the controller is configured to control a rotation angle of a motor shaft of the motor, and the controller is configured to: and when the traction motor stops rotating, controlling the traction motor to keep a rotation stop position.

Drawings

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

fig. 2 is a schematic view of an internal structure of a washing machine according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of the embodiment of the present invention FIG. 2;

FIG. 4 is a schematic diagram of the structure of a motor, reducer and clutch in accordance with an embodiment of the present invention;

FIG. 5 is a cross-sectional view of the embodiment of the present invention FIG. 4;

FIG. 6 is a top view of the outer tub in the embodiment of the present invention;

FIG. 7 is a schematic view of the retractor of an embodiment of the present invention;

FIG. 8 is a schematic diagram of a sliding potentiometer monitoring circuit according to an embodiment of the present invention;

FIG. 9 is one of the structural schematic diagrams of the cam in the embodiment of the present invention;

fig. 10 is one of the structural diagrams of the cam in the embodiment of the invention.

In the figure, the position of the upper end of the main shaft,

100. a box body; 110. an outer tub; 120. an inner barrel; 130. fixing a carrier; 140. a clutch; 150. a deflector rod;

200. a retractor; 210. a housing; 220. a traction motor; 221. a motor shaft; 230. a traction wheel; 231. a traction shaft; 240. a transmission member; 241. a first drive shaft; 242. a second drive shaft; 243. a motor gear; 244. a first drive gear; 245. a second transmission gear; 246. a cam; 247. a sliding potentiometer; 248. sliding blades; 249. detecting an output end;

300. a clutch; 310. a locking sleeve; 320. connecting sleeves;

400. a motor; 410. a rotating part; 420. a fixed part;

500. a dewatering shaft; 510. a dewatering input shaft; 520. a dehydration output shaft; 530. a connecting cylinder;

600. washing the shaft; 610. washing the input shaft; 620. washing the output shaft;

710. a sun gear; 720. a planet wheel; 730. a planet carrier.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered limiting of the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

Throughout the description of the present application, it is to be noted that, unless otherwise expressly 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 meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

As shown in fig. 1 and 2, according to some embodiments of the present application, there is provided a washing machine including: a case 100; an outer tub 110, the outer tub 110 being disposed in the cabinet 100;

as shown in fig. 1, 2 and 3, the washing machine further includes an inner tub 120, the inner tub 120 being disposed in the outer tub 110; a motor 400, the motor 400 being disposed at the bottom of the outer tub 110; a fixed carrier 130, the fixed carrier 130 being located at the bottom of the outer tub 110 and fixedly connected with the outer tub 110;

as shown in fig. 5, the washing machine further includes: a dehydrating shaft 500, the dehydrating shaft 500 being rotatably disposed on the fixed carrier 130, the extending direction of the dehydrating shaft 500 being parallel to the central axis of the inner tub 120, and the dehydrating shaft 500 being in transmission connection with the inner tub 120; a washing input shaft 610, wherein the washing input shaft 610 is in transmission connection with the rotating part 410 of the motor 400; a washing output shaft 620, the extending direction of the dewatering shaft 500 of the washing output shaft 620 is parallel to the central axis of the inner tub 120, and the washing output shaft 620 is connected with the pulsator in a transmission way; and a decelerator connected between the washing input shaft 610 and the washing output shaft 620.

The motor 400 may have the following structure: as shown in fig. 3 and 4, the motor 400 includes a rotating part 410 (rotor) and a fixing part 420 (stator), the rotating part 410 is a structure of the housing 210, and the fixing part 420 is disposed inside the rotating part 410; as shown in the drawings, the fixing carrier 130 includes a fixing housing 210 and a fixing frame connected to the fixing housing 210, the fixing housing includes an upper half housing and a lower half housing which are coupled together and fixedly connected, and the upper half housing is fixedly connected to the bottom of the outer tub 110; the speed reducer is arranged in the fixed shell.

As shown in fig. 5, the connection sleeve 320 is disposed on the dehydrating shaft 500, and is located between the locking sleeve 310 and the rotating transmission member 240, the connection sleeve 320 and the dehydrating shaft 500 are relatively fixed along the circumferential direction of the connection sleeve 320, and the connection sleeve 320 is movable relative to the dehydrating shaft 500 along the axial direction of the connection sleeve 320.

As shown in fig. 5, the connecting sleeve 320 and the dehydrating shaft 500 may be connected by a spline or a flat key, so that the connecting sleeve 320 and the dehydrating shaft 500 are relatively fixed along the circumferential direction of the connecting sleeve 320, and the connecting sleeve 320 is movable relative to the dehydrating shaft 500 along the axial direction of the connecting sleeve 320.

When the washing machine is in a washing state, as shown in fig. 3, 4 and 5, the tractor 200 pulls the upper end of the lever 150 through the traction rope, so that the lever 150 rotates around the hinge shaft, the lower end of the lever 150 abuts against the connection sleeve 320, and applies an acting force to the connection sleeve 320, so that the connection sleeve 320 moves to a locking position, since the locking sleeve 310 is fixed on the fixed carrier 130, the connection sleeve 320 and the dehydrating shaft 500 are relatively fixed along the circumferential direction of the connection sleeve 320141, the locking sleeve 310 and the connection sleeve 320 are relatively fixed, at this time, the locking sleeve 310 can lock the rotation of the connection sleeve 320, and further lock the dehydrating shaft 500, so as to disconnect the power transmission between the connection sleeve 320 and the rotation part 410 of the motor 400, at this time, the rotation part 410 of the motor 400 drives the washing input shaft 610 to rotate at a high speed, the rotation speed of the washing input shaft 610 is transmitted to the washing output shaft 620 after being decelerated by the, thereby washing the laundry in the inner tub 120.

When the pulsator washing machine is switched to a dehydration state, when the tractor 200 stops dragging the traction rope, the deflector rod 150 is not under the pulling force of the traction rope any more, and the deflector rod 150 reversely rotates around the articulated shaft under the restoring force of the elastic restoring piece, so that the lower end of the deflector rod 150 is separated from the connecting sleeve 320, and the deflector rod 150 is restored; after the shifting rod 150 is reset, the connecting sleeve 320 is no longer acted by the lower end of the shifting rod 150, and at the moment, the first elastic member applies elastic force to the connecting sleeve 320, so that the connecting sleeve 320 moves to the transmission position.

When the washing machine is in a dehydration state, the tractor 200 pulls the connection sleeve 320 to a transmission position, the rotation part 410 of the motor 400 rotates the washing input shaft 610, and the washing input shaft 610 drives the sun gear 710 to rotate; meanwhile, the rotating part 410 of the motor 400 drives the dewatering shaft 500 (the dewatering input shaft 510, the dewatering output shaft 520 and the connecting cylinder 530) to rotate at the same direction and speed as the sun gear 710 through the rotating transmission member 240, the dewatering output shaft 520 drives the inner tub 120 to rotate at the same direction and speed as the sun gear 710, the connecting cylinder 530 drives the outer gear ring to rotate at the same direction and speed as the sun gear 710, and the planet carrier 730 rotates at the same direction and speed as the sun gear 710 at this time according to the characteristics of the planet gear 720 system; since the planet carrier 730 is connected to the washing output shaft 620, the planet carrier 730 can drive the pulsator and the sun gear 710 to rotate at the same direction and speed through the washing output shaft 620, and at this time, the inner tub 120 and the pulsator rotate at the same direction and speed, thereby performing centrifugal dehydration treatment on the laundry in the inner tub 120.

As shown in fig. 6 and 7, according to some embodiments of the present application, the washing machine includes a retractor 200, and the retractor 200 is disposed in the cabinet 100 to retract the lever 150 to switch an operating state of the washing machine.

As shown in fig. 7, in some embodiments according to the present application, the retractor 200 includes a housing 210, and the housing 210 has a box shape, and a first shaft hole, a second shaft hole, and a third shaft hole are formed in the housing 210.

The casing 210 is connected to the bottom of the outer tub 110 and accommodates a traction motor 220, a traction wheel 230, and a transmission member 240.

As shown in fig. 7, in some embodiments according to the present application, the retractor 200 includes a traction motor 220, and a terminal of the traction motor 220 is inserted through the first shaft hole by a wire.

The traction motor 220 is used to provide tractive torque to the tractor 200.

As shown in fig. 7, in some embodiments according to the present application, the retractor 200 includes a retractor wheel 230, the retractor wheel 230 having a disk shape, and a retractor shaft 231 is provided on a top of the retractor wheel 230.

The traction wheel 230 is rotatably disposed on the housing 210, a traction shaft 231 is disposed on the traction wheel 230, and a traction rope is connected to the traction shaft 231 and connected to the shift lever 150.

The traction wheel 230 rotates with the second transmission shaft 242 to pull the traction rope, which pulls the lever 150 for changing the operation state of the washing machine.

As shown in fig. 7, in some embodiments according to the present application, the retractor 200 includes a transmission 240, the transmission 240 including a first transmission shaft 241, a second transmission shaft 242, a motor 400 gear 243, a first transmission gear 244, and a second transmission gear 245.

The transmission 240 is disposed between the traction wheel 230 and the traction motor 220 to transmit the output torque of the traction motor 220 to the traction wheel 230.

Specifically, the first transmission shaft 241 is rotatably disposed on the inner wall of the housing 210, the second transmission shaft 242 is rotatably disposed on the inner wall of the housing 210, one end of the second transmission shaft 242 extends to the outside of the housing 210, the traction wheel 230 is connected to the second transmission shaft 242, the gear 243 of the motor 400 is disposed on the shaft 221 of the motor 400 of the traction motor 220, the first transmission gear 244 is disposed on the first transmission shaft 241, the first transmission gear 244 is engaged with the gear 243 of the motor 400, the second transmission gear 245 is disposed on the second transmission shaft 242, and the second transmission gear 245 is engaged with the first transmission gear 244.

The first transmission shaft 241 is used for receiving the torque of the traction motor 220, the second transmission shaft 242 is used for receiving the torque of the traction motor 220 transmitted by the first transmission shaft 241, the gear 243 of the motor 400 is used for transmitting the torque of the traction motor 220 to the first transmission gear 244, the first transmission gear 244 is used for transmitting the torque of the traction motor 220 to the first transmission shaft 241 and driving the first transmission shaft 241 to rotate, and the second transmission gear 245 is used for enabling the second transmission shaft 242 and the first transmission shaft 241 to rotate together.

As shown in fig. 7 and 8, according to some embodiments of the present application, the retractor 200 includes a sliding potentiometer monitoring circuit for monitoring the distance the retractor 200 pulls the toggle lever 150 in real time.

According to some embodiments of the present application, a sliding potentiometer monitoring circuit includes: cam 246, sliding potentiometer 247, slide 248 and detection output 249, the distance from each point on the profile of cam 246 to the center of rotation of cam 246 is different.

A cam 246 is disposed on the traction wheel 230, and in particular, the cam 246 is connected to the second transmission shaft 242 so that the cam 246 and the traction wheel 230 rotate synchronously.

The sliding potentiometer 247 is disposed on the housing 210.

The slide potentiometer 247 is used to convert the linear travel of the slide 248 into a measurably recorded value, i.e. into a resistance value.

Slide 248 one end of slide 248 is slidably disposed on slide potentiometer 247 to change the resistance of slide potentiometer 247, and the other end of slide 248 contacts cam 246.

The slide 248 is used to convert the curved travel of the cam 246 into a linear travel.

A detection output 249, wherein the detection output 249 is electrically connected to the sliding potentiometer 247.

And the monitoring output end is used for outputting the resistance value of the sliding point location device.

In the process that the sliding potentiometer monitoring circuit detects the moving distance of the pulling shifter lever 150 by the tractor 200, the rotating cam 246 abuts against the sliding piece 248 to move to different positions of the sliding potentiometer 247 so as to convert the moving distance of the pulling lever 150 into the resistance value variation of the sliding potentiometer 247, thereby ensuring the accuracy of the tractor 200 in monitoring the moving distance of the pulling shifter lever 150.

That is, during the rotation of the cam 246 along with the second transmission shaft 242, the cam 246 pushes the sliding piece 248 to slide on the sliding potentiometer 247 so as to change the resistance value of the sliding potentiometer 247, when the sliding piece 248 slides on the sliding potentiometer 247, the resistance value of the sliding potentiometer 247 is changed by changing a single variable (the power-on length of the sliding potentiometer 247), the detection output end 249 detects the change of the resistance value of the sliding potentiometer 247 in real time and transmits the change of the resistance value to the controller, and the controller controls the traction distance of the tractor 200 by quantitatively changing the resistance value of the sliding potentiometer 247.

The rotating cam 246 contacts the sliding piece 248 to move to different positions of the sliding potentiometer 247, so as to convert the moving distance of the shift lever 150 into the resistance value variation of the sliding potentiometer 247, and the moving distance L of the shift lever 150 and the resistance value variation of the sliding potentiometer 247 generate a one-to-one correspondence relationship.

Specifically, as shown in fig. 9 and 10, the initial radius of the cam 246 is r1, the stopping radius of the cam 246 is r2, the opening width of the cam 246 is a, the distance from the pulling shaft 231 to the pulling center is r3, the initial distance of the sliding piece 248 on the sliding potentiometer 247 is L2, the stopping sliding distance of the sliding piece 248 on the sliding potentiometer 247 is L1, and the maximum slidable distance of the sliding potentiometer 247 is L3, and the relationship between the pulling length and the resistance value can be derived according to the above values, and the derivation process is as follows:

drawing length L after cam rotating theta angle r3 h (1-cos theta) (1)

The cam curve radius increment is as follows: Δ r-r 2-r1 (A/2 is not) theta (2)

The distance that slide 248 moves is the same as the cam curve radius increment: L1-L2 ═ Δ r

The resistance value of the initial state sliding potentiometer 247 is: R-L2/L3R Total (3)

The resistance value of the sliding potentiometer 247 after the rotation by the angle θ is: r is L1/L3R (4)

The formula (1) to the formula (4) shows that the rotation angle theta and the resistance value delta R are in one-to-one relation, so that the motion position of the cam can be judged by detecting the resistance value.

In some embodiments according to the present application, the sliding potentiometer monitoring circuit further comprises a controller coupled to the traction motor 220 and the detection output 249.

The controller is used for determining the resistance value variation of the sliding potentiometer 247 in real time, and the controller is used for controlling the rotation angle of the motor 400 shaft 221 of the motor 400 so as to realize the controllability of the traction distance of the tractor 200.

The controller is configured to: when the traction motor 220 stops rotating, the traction motor 220 is controlled to keep the position of stopping rotating.

The specific operating principle of the cam 246 is: when the cam 246 rotates, the radius from the contact point of the cam 246 and the sliding piece 248 to the traction center changes in real time, the sliding piece 248 is driven to slide on the sliding potentiometer 247 through the change of the radius from the contact point of the cam 246 and the sliding piece 248 to the traction center, the accessed resistance value of the sliding potentiometer 247 is changed through changing the power-on length of the sliding potentiometer 247, the driving lever 150 is pulled in the rotating process of the cam 246, the traction distance is converted into the moving distance of the driving lever 150, the working state of the washing machine is changed, the resistance value of the sliding potentiometer 247 can be obtained in real time through the controller, the rotating angle of the traction motor 220 is controlled, the traction device 200 can be stopped at all points in the stroke, and the traction device 200 can keep the current traction position.

According to the first concept of the application, owing to add slip potentiometre monitoring circuit, set up the cam structure in the tractor, the cam drives load (driving lever) traction movement when rotating, the cam structure drives the gleitbretter and moves on the slip potentiometre simultaneously, convert the distance of pulling into gleitbretter displacement distance, when moving on the slip potentiometre through the gleitbretter, change the position on the slip potentiometre, thereby the resistance of slip potentiometre also changes, convert the distance of pulling into the resistance, and reach the purpose of real-time detection distance of pulling through detecting output resistance to the controller, so guaranteed that the tractor detects the precision height of pulling the distance, washing machine's working property has been promoted simultaneously.

According to the second conception of the application, owing to improved the working form of tractor, will the controller is connected to traction motor, with control traction motor pulls the driving lever removes, and works as when traction motor stall, control traction motor keeps stall's position, so guaranteed the traction distance precision of tractor and pull the length controllable, and avoided traction motor to stop the shift fork and get back to the condition appearance of initial position.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A washing machine comprising:

the clutch is arranged in the box body, and the clutch is connected with a deflector rod;

an outer tub disposed in the case;

an inner tub disposed in the outer tub;

it is characterized by also comprising:

the tractor, set up in the box, be used for drawing the driving lever is in order to switch washing machine's operating condition, the tractor includes:

and the sliding potentiometer monitoring circuit is used for monitoring the moving distance of the deflector rod dragged by the tractor in real time.

2. The washing machine as claimed in claim 1, further comprising:

and the fixed carrier is connected with the outer barrel, and the middle part of the shifting lever is rotationally connected with the fixed carrier.

3. The washing machine as claimed in claim 2, wherein the clutch comprises:

and the shifting end of the shifting lever is abutted against the connecting sleeve.

4. The washing machine as claimed in claim 3, wherein the retractor retracts a retracting end of the lever to restrict the lever from rotating around a connection of the lever and the fixed carrier, and the retracting end of the lever presses the connection sleeve to move from a transmission position to a locking position to switch the washing machine from a dehydration state to a washing state.

5. A washing machine as claimed in claim 4 wherein the retractor further comprises:

a casing connected to the bottom of the outer tub;

the traction wheel is provided with a traction shaft, the traction shaft is connected with a traction rope, the traction rope is connected to the deflector rod, and the traction wheel is rotationally arranged on the shell to drag the deflector rod to move;

the traction motor is arranged on the shell, and a motor shaft of the traction motor penetrates into the shell;

and the transmission part is arranged between the traction wheel and the traction motor so as to transmit the output torque of the traction motor to the traction wheel.

6. A sliding potentiometer monitoring circuit, which is applied to the washing machine according to any one of claims 1 to 5 and is used for monitoring the moving distance of the deflector rod dragged by the tractor in real time.

7. The sliding potentiometer monitoring circuit according to claim 6, wherein the sliding potentiometer monitoring circuit comprises:

the cam is arranged on the traction wheel so as to enable the cam and the traction wheel to synchronously rotate;

the sliding potentiometer is arranged on the shell;

one end of the sliding piece is slidably arranged on the sliding potentiometer so as to change the resistance value of the sliding potentiometer, and the other end of the sliding piece is abutted to the cam;

and the detection output end is electrically connected with the sliding potentiometer.

8. The sliding potentiometer monitoring circuit according to claim 7, wherein each point on the profile of the cam has a different distance to the center of rotation of the cam.

9. The sliding potentiometer monitoring circuit according to any of claims 7 or 8, wherein the rotating cam abuts against the sliding piece to move to different positions of the sliding potentiometer to convert the moving distance of the shift lever into the resistance change amount of the sliding potentiometer.

10. The sliding potentiometer monitoring circuit according to claim 9, further comprising:

the controller, traction motor with detect the output and all connect in the controller, the controller is used for confirming in real time the resistance variation of slip potentiometre, and the controller is used for controlling the motor shaft pivoted angle of motor, the controller is configured to:

and when the traction motor stops rotating, controlling the traction motor to keep a rotation stop position.