CN110804842A

CN110804842A - Driving system of washing machine and drum washing machine with same

Info

Publication number: CN110804842A
Application number: CN201810880076.6A
Authority: CN
Inventors: 闫甜甜; 胡义明; 李萍
Original assignee: Guangdong Welling Motor Manufacturing Co Ltd; Midea Welling Motor Technology Shanghai Co Ltd
Current assignee: Guangdong Welling Motor Manufacturing Co Ltd; Midea Welling Motor Technology Shanghai Co Ltd
Priority date: 2018-08-03
Filing date: 2018-08-03
Publication date: 2020-02-18

Abstract

The invention discloses a driving system of a washing machine and a drum washing machine with the same, wherein the driving system comprises: the first end of the impeller shaft is suitable for being connected with the impeller; the wave wheel shaft can rotate relative to the roller shaft sleeve, and the first end of the roller shaft sleeve is suitable for being connected with the roller; the roller shaft is sleeved on the support component and can rotate relative to the support component, and the support component is suitable for being connected with the outer barrel; the motor is an inner rotor motor and is suitable for being connected with the outer barrel; the belt transmission mechanism comprises a belt pulley and a belt, one end of the belt is sleeved on the outer peripheral side of the output shaft of the motor, the other end of the belt is sleeved on the outer peripheral side of the belt pulley, and the belt pulley is connected with the second end of the roller shaft sleeve; a gear transmission mechanism; a clutch mechanism. The driving system of the washing machine has the advantages of low cost, low energy consumption, good rigidity and strength, easy assembly and small occupation of the axial space of the washing machine on the basis of realizing double output functions.

Description

Driving system of washing machine and drum washing machine with same

Technical Field

The invention relates to the technical field of washing machines, in particular to a driving system of a washing machine and a drum washing machine with the same.

Background

In order to improve the cleaning ability of the washing machine, it is generally adopted to provide a pulsator at the bottom of a drum of the washing machine, so that the drum and the pulsator relatively operate at different speeds during washing, thereby increasing the friction force between the laundry and improving the washing ratio. The related technology discloses a double-power drum washing machine, which is driven by an outer rotor DD motor (outer rotor linear motor), wherein a rotor is directly and fixedly connected with a wave wheel through a wave wheel shaft and runs at the same speed; the sun wheel fixedly connected to the impeller shaft transmits power to the drum shaft in an equal speed ratio through the planet wheel, and the same-direction differential operation of the impeller and the drum is realized. In order to reduce the axial size of the compression and realize the installation function, the front bearing support and the rear bearing support are required to be designed in a split mode, the gear box is arranged between the front bearing and the rear bearing, and the front bearing support and the rear bearing support are connected together through assembly. In addition, the dual-power drum washing machine in the related art generally fixes the rotor on the impeller shaft, and the impeller shaft is a slender shaft, which causes the problems of insufficient rigidity and the like. Moreover, the design scheme thoroughly changes the assembly mode and the connection relation of the traditional drum washing machine driving system, greatly changes the whole machine design, and has the problems of more parts, difficult assembly, low axial space utilization rate and the like.

In addition, compared with the traditional BLDC inner rotor motor, the outer rotor DD motor has the advantages of large starting torque requirement, large difference of rotating speed during washing and dehydration, large energy consumption and high cost.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the driving system of the washing machine provided by the invention has the advantages of low cost, low energy consumption, good rigidity and strength, simple structure, small design change, easiness in assembly and small occupation on the axial space of the washing machine on the basis of realizing the double-output function.

The invention also provides a washing machine with the driving system of the washing machine.

According to the driving system of the washing machine of the embodiment of the present invention, the washing machine includes the driving system, an outer tub, a drum rotatably provided in the outer tub, and a pulsator rotatably provided at a bottom of the drum, the driving system includes: the first end of the impeller shaft is suitable for being connected with the impeller; the roller shaft sleeve is sleeved on the periphery of the impeller shaft, the impeller shaft can rotate relative to the roller shaft sleeve, and the first end of the roller shaft sleeve is suitable for being connected with the roller; the roller shaft is sleeved on the support assembly and can rotate relative to the support assembly, and the support assembly is suitable for being connected with the outer barrel; the motor is an inner rotor motor and is suitable for being connected with the outer barrel; the belt transmission mechanism comprises a belt pulley and a belt, one end of the belt is sleeved on the outer peripheral side of an output shaft of the motor, the other end of the belt is sleeved on the outer peripheral side of the belt pulley, and the belt pulley is connected with the second end of the roller shaft sleeve; the second end of the impeller shaft is connected with the belt transmission mechanism through the gear transmission mechanism; the clutch mechanism is selectively matched with one of the gear transmission mechanism and the bracket assembly, and when the clutch mechanism is matched with the gear transmission mechanism, the wave wheel shaft and the roller shaft sleeve synchronously rotate; when the clutch mechanism is matched with the bracket component, the wave wheel shaft and the roller shaft sleeve rotate at a differential speed.

According to the driving system of the washing machine, the motor is the inner rotor motor, and the power of the motor is transmitted to the inner gear ring through the belt and the belt pulley, so that the cost and the energy consumption of the motor can be reduced on the basis of ensuring the starting torque of the washing machine, the cost and the energy consumption of the driving system are reduced, the rigidity of the driving system is improved, and the axial size of the driving system is reduced. In addition, when the clutch mechanism is matched with the gear transmission mechanism, the impeller shaft and the roller shaft sleeve rotate synchronously, and when the clutch mechanism is matched with the bracket component, the impeller shaft and the roller shaft sleeve rotate in a differential mode, so that the impeller shaft and the roller shaft sleeve are switched between a synchronous rotation mode and a differential rotation mode, and the washing machine can adapt to clothes made of different materials.

In some embodiments of the present invention, the pulley has a central hole, the inner peripheral wall of the central hole is formed with a first spline portion, the second end of the drum sleeve has a pulley coupling portion fitted in the central hole, and the pulley coupling portion is formed with a second spline portion fitted with the first spline portion.

In some embodiments of the present invention, the bracket assembly includes a bearing bracket and a rear shell connected to each other, the bearing bracket is provided with a bearing, the bearing is sleeved on the periphery of the roller shaft sleeve, the rear shell is disposed on one axial side of the bearing bracket, an accommodating space is defined between the bearing bracket and the rear shell, and the belt transmission mechanism, the gear transmission mechanism and the clutch mechanism are all located in the accommodating space.

Optionally, the bearing support is an integrally formed part.

In some optional embodiments of the present invention, an avoiding gap is formed on the outer peripheral wall of the rear shell, and one end of the belt passes through the avoiding gap and is sleeved on the outer peripheral side of the output shaft.

In some embodiments of the invention, the gear transmission comprises: the inner gear ring is connected with the belt pulley and coaxially arranged, and when the clutch mechanism is matched with the inner gear ring, the wave wheel shaft and the roller shaft sleeve synchronously rotate; the sun wheel is connected to the wave wheel shaft and is coaxially arranged with the wave wheel shaft, and the sun wheel is positioned on the inner side of the inner gear ring; the planet carrier assembly is provided with a plurality of planet wheel shafts, and the planet carrier assembly is sleeved on the periphery of the impeller shaft and can rotate relative to the impeller shaft; the planetary wheels are arranged between the inner gear ring and the sun gear and arranged around the periphery of the sun gear, and are engaged with the inner gear ring and the sun gear.

Optionally, a plurality of the planet gears are in a group, and each planet gear is directly meshed with the inner gear ring and the sun gear.

In some optional embodiments of the invention, the plurality of planet gears are two sets of intermeshing gears, one of the two sets of planet gears being in mesh with an annulus gear and the other set being in mesh with the sun gear.

Optionally, an avoiding groove is formed in an inner peripheral wall of the second end of the roller shaft sleeve, the avoiding groove penetrates through an axial end face of the second end of the roller shaft sleeve, a part of the planet carrier assembly is accommodated in the avoiding groove, and the planet carrier assembly is spaced from the roller shaft sleeve.

In some alternative embodiments of the present invention, the ring gear is integrally injection-molded on the pulley.

Optionally, the clutch mechanism comprises: the clutch sliding sleeve is characterized in that a third spline part is formed on the inner peripheral wall of the clutch sliding sleeve, the planet carrier assembly comprises a planet carrier and a cover plate which are connected with each other, an inner gear ring is rotatably arranged between the outer peripheral wall of the planet carrier and the inner peripheral wall of the cover plate, an installation space is defined between the planet carrier and the cover plate, the sun gear and the plurality of planet gears are both positioned in the installation space, a fourth spline part matched with the third spline part is formed on the outer peripheral wall of the cover plate, and the clutch sliding sleeve is slidable between a first position and a second position relative to the cover plate along the axial direction; the electromagnetic coil assembly is suitable for driving the clutch sliding sleeve to slide towards a first direction along the axial direction when the electromagnetic coil assembly is electrified; the clutch spring is used for driving the clutch sliding sleeve to slide towards a second direction opposite to the first direction, the clutch sliding sleeve is matched with the inner gear ring when the clutch sliding sleeve slides towards the first direction to the first position, and the clutch sliding sleeve is matched with the support assembly when the clutch sliding sleeve slides towards the second direction to the second position.

In some optional embodiments of the invention, the clutch spring is arranged between the bracket assembly and the clutch sliding sleeve.

Optionally, the clutch spring is arranged between the belt pulley and the clutch sliding sleeve.

In some optional embodiments of the present invention, a plurality of first clutch teeth circumferentially arranged are formed on the first axial end surface of the clutch sliding sleeve, a second clutch tooth matched with the plurality of first clutch teeth is formed on the inner gear ring, a plurality of third clutch teeth circumferentially arranged are formed on the second axial end surface of the clutch sliding sleeve, and a fourth clutch tooth matched with the plurality of third clutch teeth is formed on the bracket assembly.

Optionally, in an axial direction of the clutch sliding sleeve, the first clutch tooth and the third clutch tooth are each formed in a stepped shape.

A drum washing machine according to an embodiment of the present invention includes: an outer tub; a drum rotatably provided in the tub; the impeller is rotatably arranged at the bottom of the roller; in the above driving system of the washing machine, the first end of the impeller shaft is connected to the impeller, the first end of the drum shaft sleeve is connected to the drum, the bracket assembly is connected to the outer tub, and the motor is connected to the outer tub.

According to the drum washing machine of the embodiment of the invention, the driving system of the washing machine is arranged, the motor is an inner rotor motor, and the power of the motor is transmitted to the inner gear ring through the belt and the belt pulley, so that the cost and the energy consumption of the motor can be reduced on the basis of ensuring the starting torque of the washing machine, the cost and the energy consumption of the driving system are reduced, and compared with the traditional method that the motor is fixed on a motor shaft, the rigidity of the driving system is improved by connecting the belt pulley with the second end of the drum shaft sleeve, the axial size of the driving system is reduced, in addition, when the clutch mechanism is matched with the gear transmission mechanism, the impeller shaft and the drum shaft sleeve synchronously rotate, when the clutch mechanism is matched with the bracket assembly, the impeller shaft and the drum shaft sleeve rotate in a differential mode, so that the impeller shaft and the drum shaft sleeve are switched between the synchronous, thereby enabling the washing machine to adapt to clothes of different materials.

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 diagram of a drive system according to an embodiment of the present invention;

FIG. 2 is an exploded schematic view of a drive system according to an embodiment of the present invention;

FIG. 3 is a cross-sectional schematic view of a drive system according to an embodiment of the invention;

FIG. 4 is a rear view of a drive system according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a drum sleeve according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a wave wheel shaft according to an embodiment of the invention;

FIG. 7 is a schematic structural diagram of a clutch sleeve according to an embodiment of the invention;

FIG. 8 is a schematic structural diagram of a planet carrier according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a cover plate according to an embodiment of the present invention;

fig. 10 is a structural schematic view of an inner ring gear according to an embodiment of the invention;

FIG. 11 is a schematic illustration of the assembled relationship of a gear assembly according to an embodiment of the invention.

Reference numerals:

a washing machine 100;

a drive system 10;

a wave wheel shaft 1; a pulsator connecting portion 11; a small oil seal connecting portion 12; a bush mounting portion 13; a first shoulder 14; a second shoulder 15;

a roller shaft sleeve 2; a pulley connecting portion 21; a second spline portion 211; a drum connecting portion 22; a large oil seal connecting portion 23;

a bearing mounting portion 24; a small oil seal mounting portion 25; a first bushing mounting portion 26; a second bush mounting portion 27; an avoidance groove 28;

a bracket assembly 3; a bearing bracket 31; a first bearing chamber 311; a second bearing chamber 312; a rear case 32; avoiding the notch 321; a fourth clutch tooth 322;

a motor 4; an output shaft 41;

a belt transmission mechanism 5; a pulley 51; a central bore 511; a first spline portion 512; a belt 52;

a gear transmission mechanism 6;

an inner gear ring 61; the second clutch teeth 611; a flange plate 612; a second oil retaining portion 615;

a sun gear 62;

a planet carrier assembly member 63; a carrier 631; a support post 6311; a third bushing mounting portion 6312; a first mounting hole 6313; a first oil blocking portion 6314; a planetary shaft 6315; a cover plate 632; a fourth spline portion 6321; a second mounting hole 6322; a support post through hole 6323; a fourth bushing mounting portion 6324;

the planet wheels 64;

a clutch mechanism 7; a clutch sleeve 71; a third spline portion 711; a first clutch tooth 712; the third clutch teeth 713; a non-magnetic conductive tooth 714; a flux sleeve 715; a spring mounting portion 716; an electromagnetic coil assembly 72; a clutch spring 73;

the first bushing 81; a second bushing 82; a third bush 83; a fourth bushing 84; a fifth bush 85; a first bearing 86; a second bearing 87;

a large water seal 91; a first sealing lip 911; a small water seal 92; the third sealing lip 921; an adjustment washer 93; a circlip 94;

an outer tub 20;

a drum 30;

a pulsator 40.

Detailed Description

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

A driving system 10 of a washing machine 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 11.

As shown in fig. 1 to 4, the driving system 10 of the washing machine 100 according to the embodiment of the present invention, the washing machine 100 includes the driving system 10, an outer tub 20, a drum 30 and a pulsator 40, the drum 30 is rotatably disposed in the outer tub 20, the pulsator 40 is rotatably disposed at a bottom of the drum 30, wherein the bottom of the drum 30 is opposite to an open mouth of the drum 30, for example, as shown in fig. 3, the drum 30 has a washing chamber therein, a front of the washing chamber is formed with an open mouth, and the pulsator 40 is rotatably disposed at a rear of the washing chamber.

As shown in fig. 1-4, the drive system 10 may include a wave wheel shaft 1, a roller sleeve 2, a bracket assembly 3, a motor 4, a belt drive 5, a gear drive 6, and a clutch 7.

Referring to fig. 3, a first end (e.g., a front end as shown in fig. 3) of the impeller shaft 1 is adapted to be connected to the impeller 40, the drum shaft sleeve 2 is disposed around the impeller shaft 1, the impeller shaft 1 is rotatable relative to the drum shaft sleeve 2 to rotate the impeller 40, the first end (e.g., a rear end as shown in fig. 3) of the drum shaft sleeve 2 is adapted to be connected to the drum 30, and the drum shaft sleeve 2 is adapted to rotate the drum 30.

Referring to fig. 3, the drum sleeve 2 is disposed on the support assembly 3 and is rotatable relative to the support assembly 3, the support assembly 3 is adapted to be connected to the outer tub 20, the motor 4 is an inner rotor motor 4, and the motor 4 is adapted to be connected to the outer tub 20. This contributes to reducing the cost and energy consumption of the motor 4. For example, the motor 4 is a BLDC inner rotor motor (dc brushless inner rotor motor).

As shown in fig. 2, the belt transmission mechanism 5 includes a belt pulley 51 and a belt 52, one end of the belt 52 is sleeved on the outer periphery of the output shaft 41 of the motor 4, the other end of the belt 52 is sleeved on the outer periphery of the belt pulley 51, the belt pulley 51 is connected with the second end of the drum shaft sleeve 2, and the second end of the impeller shaft 1 is connected with the belt transmission mechanism 5 through the gear transmission mechanism 6. When the motor 4 works, the belt transmission mechanism 5 transmits the power of the motor 4 to the roller shaft sleeve 2 to drive the roller shaft sleeve 2 to rotate; meanwhile, the belt transmission mechanism 5 transmits the power of the motor 4 to the gear transmission mechanism 6, and then the power is transmitted to the impeller shaft 1 through the gear transmission mechanism 6, so that the impeller shaft 1 is driven to rotate.

It can be understood that the pulsator shaft 1 is a slender shaft, and the diameter of the drum sleeve 2 is greater than that of the pulsator shaft 1, which is advantageous to improve the rigidity of the driving system 10 by connecting the belt pulley 51 with the second end of the drum sleeve 2, compared to the conventional motor in which the rotor is directly fixed to the pulsator shaft, and the belt pulley 51 occupies a smaller space than the motor 4 in the length direction of the pulsator shaft 1, thereby facilitating the reduction of the axial size of the driving system 10, and in addition, the belt 52 and the belt pulley 51 transmit the power of the motor 4 to the gear transmission mechanism 6, thereby reducing the rotation speed and increasing the torque, and thus ensuring the starting torque of the washing machine 100.

As shown in fig. 1 and 2, the clutch mechanism 7 is selectively matched with one of the gear transmission mechanism 6 and the bracket component 3, and when the clutch mechanism 7 is matched with the gear transmission mechanism 6, the wave wheel shaft 1 and the roller shaft sleeve 2 synchronously rotate; when the clutch mechanism 7 is matched with the bracket component 3, the wave wheel shaft 1 and the roller shaft sleeve 2 rotate at a differential speed. The 'synchronous rotation of the impeller shaft 1 and the roller shaft sleeve 2' means that the impeller shaft 1 and the roller shaft sleeve 2 rotate in the same direction and rotate at the same angular speed, and the 'differential rotation of the impeller shaft 1 and the roller shaft sleeve 2' means that the impeller shaft 1 and the roller shaft sleeve 2 rotate at different angular speeds, and the differential rotation can be the same-direction differential rotation or the reverse differential rotation. Therefore, the pulsator shaft 1 and the drum sleeve 2 are switched between two washing modes of synchronous rotation and differential rotation, and whether the drum 30 and the pulsator 40 rotate at differential speed (i.e., the dual-output and single-output washing modes are switched) can be controlled by controlling whether the pulsator shaft 1 and the drum sleeve 2 rotate at differential speed under the washing condition, so that the washing machine 100 can adapt to clothes of different materials. For example, when washing, the washing machine 100 may switch to a single-output washing state (the pulsator shaft 1 and the drum sleeve 2 rotate synchronously), and at this time, the washing machine 100 has an advantage of not damaging the laundry, and may wash laundry such as cashmere or silk, etc. that needs to be washed gently; when the washing machine 100 is switched to a dual-output washing state (differential rotation of the impeller shaft 1 and the drum sleeve 2), the washing machine 100 has a strong washing capability and can wash stubborn dirt or washing-resistant clothes.

According to the driving system 10 of the washing machine 100 of the embodiment of the present invention, the motor 4 is an inner rotor motor, and the power of the motor 4 is transmitted to the inner gear ring 61 through the belt 52 and the belt pulley 51, so that the cost and the energy consumption of the motor 4 can be reduced on the basis of ensuring the starting torque of the washing machine 100, and the cost and the energy consumption of the driving system 10 can be reduced, compared with the conventional method of fixing the motor on the motor shaft, the rigidity of the driving system 10 can be improved and the axial size of the driving system 10 can be reduced by connecting the belt pulley 51 with the second end of the drum sleeve 2, and in addition, when the clutch mechanism 7 is engaged with the gear transmission mechanism 6, the impeller shaft 1 and the drum sleeve 2 rotate synchronously, and when the clutch mechanism 7 is engaged with the bracket assembly 3, the impeller shaft 1 and the drum sleeve 2 rotate differentially, so that the impeller shaft 1 and the drum sleeve 2 are switched between the synchronous rotation mode, thereby enabling the washing machine 100 to accommodate laundry of different materials.

In some embodiments of the present invention, as shown in fig. 2, the pulley 51 has a central hole 511, a first spline portion 512 is formed on an inner peripheral wall of the central hole 511, the second end of the drum sleeve 2 has a pulley coupling portion 21, the pulley coupling portion 21 is fitted in the central hole 511, and a second spline portion 211 fitted with the first spline portion 512 is formed on the pulley coupling portion 21. Therefore, the first spline part 512 on the inner peripheral wall of the central hole 511 is matched with the second spline part 211 on the pulley connecting part 21, so that the connection strength between the pulley 51 and the roller sleeve 2 is improved, and the stability of the pulley 51 driving the roller sleeve 2 to work is improved.

In some embodiments of the present invention, as shown in fig. 1 and 2, the bracket assembly 3 includes a bearing bracket 31 and a rear shell 32 connected to each other, the bearing bracket 31 is provided with a bearing, and the bearing is sleeved on the outer periphery of the drum shaft sleeve 2, the rear shell 32 is provided on one axial side of the bearing bracket 31, an accommodating space is defined between the bearing bracket 31 and the rear shell 32, and the belt transmission mechanism 5, the gear transmission mechanism 6 and the clutch mechanism 7 are located in the accommodating space. Therefore, the belt transmission mechanism 5, the gear transmission mechanism 6 and the clutch mechanism 7 are isolated from the external environment, and the working stability of the belt transmission mechanism 5, the gear transmission mechanism 6 and the clutch mechanism 7 is improved.

For example, as shown in fig. 1, the bearing bracket 31 is fixedly connected to the tub 20, the front and rear ends of the inner hole thereof are respectively provided with a first bearing chamber 311 and a second bearing chamber 312, the outer races of the first bearing 86 and the second bearing 87 are respectively fixedly installed in the first bearing chamber 311 and the second bearing chamber 312, the drum sleeve 2 is rotatably installed in the inner hole of the bearing bracket 31 through the first bearing 86 and the second bearing 87, the rear end of the drum sleeve 2 is provided with the pulley connecting portion 21, the pulley 51 is fixedly connected at the pulley connecting portion 21 with an opening facing backward, the drum sleeve 2 is a hollow structure, and as shown in fig. 1 and 11, the impeller shaft 1 is rotatably installed in the drum sleeve 2 through the first bushing 81 and the second bushing 82 press-fitted in the inner hole of the drum sleeve 2.

Alternatively, the bearing bracket 31 is an integrally formed piece. Thereby, it is advantageous to improve the support rigidity of the bearing bracket 31.

In some embodiments of the present invention, as shown in fig. 6, the roller shell 2 is a hollow rotary structure, the outer peripheral wall of the roller shell 2 is provided with a roller connecting portion 22, a large oil seal connecting portion 23, a bearing mounting portion 24 and a pulley connecting portion 21 in sequence from front to back, and the inner bore of the roller shell 2 is provided with a small oil seal mounting portion 25, a first bush mounting portion 26, a second bush mounting portion 27 and an escape groove 28 in sequence from front to back. In assembling, referring to fig. 1, the drum sleeve 2 is fitted into the bearing hole from the first bearing 86 end, the bearing mounting portion 24 is installed in the inner holes of the first bearing 86 and the second bearing 87, so that the drum sleeve 2 is pivotally installed inside the bearing bracket 314, the front end of the drum sleeve 2 is fixedly connected with the drum 30 through the drum connecting portion 22, and the pulley connecting portion 21 at the rear end is fixedly connected with the pulley 51.

Further, the pulsator shaft 1 is provided with a pulsator connecting portion 11, a small oil seal mounting portion 25, a bushing mounting portion 13, a first shoulder 14 and a second shoulder 15 in this order from the front to the rear. The impeller shaft 1 is rotatably supported in the inner hole of the roller shaft sleeve 2 through a first bush 81 and a second bush 82, and the impeller shaft 1 is limited in the second bush 82 forwards through a first shaft shoulder 14; an adjusting washer 93 is assembled on one side of the impeller shaft 1, which penetrates through the first bush 81, and is used for adjusting the axial movement between the impeller shaft 1 and the roller shaft sleeve 2, and then the adjusting washer 93 is limited at the first bush 81 backwards through an elastic retainer ring 94 arranged at the front end of the adjusting washer 93; the front end of the impeller shaft 1 is fixedly connected with the impeller 40 through an impeller connecting part 11, and the rear end is fixedly connected with a sun wheel 62 and limited on a second shaft shoulder 15. Thereby, the operation of the impeller shaft 1 can be stabilized and secured.

Optionally, seals are provided between the bearing bracket 31, the roller shell 2 and the wave wheel shaft 1, the seals comprising a large water seal 91 and a small water seal 92. The large water seal 91 is fixedly arranged in an inner hole at the front end of the bearing bracket 31 and is inwards connected with the roller shaft sleeve 2 in a sealing way; the small water seal 92 is fixedly arranged in the inner hole at the front end of the roller shaft sleeve 2 and is inwards connected with the impeller shaft 1 in a sealing way. Specifically, as shown in fig. 1, the large water seal 91 is fixed at the front end of the bearing bracket 31, and the inner hole of the bearing bracket 31 is provided with a first sealing lip 911 which abuts against the large oil seal connecting part 23 of the roller sleeve 2; the outer ring of the small water seal 92 is fixedly connected with the small oil seal mounting part 25 of the roller shaft sleeve 2, the small water seal 92 is internally provided with a third sealing lip 921, and the third sealing lip 921 abuts against the small oil seal connecting part 12 of the wave wheel 40 shaft.

In some alternative embodiments of the present invention, as shown in fig. 2, an avoiding gap 321 is formed on the peripheral wall of the rear shell 32, and one end of the belt 52 passes through the avoiding gap 321 and is sleeved on the outer peripheral side of the output shaft 41. Therefore, the avoidance notch 321 is arranged, so that two ends of the belt 52 are connected with the output shaft 41 and the belt pulley 51 respectively, and the interference between the belt 52 and the rear shell 32 is avoided. For example, the motor 4 is fixedly connected to the outer tub 20, the shaft of the motor 4 is arranged parallel to the impeller shaft 1, one end of the belt 52 is sleeved on the outer periphery of the output shaft 41 of the motor 4, the other end is sleeved on the outer periphery of the belt pulley 51, the rear shell 32 is fixedly connected to the rear end face of the bearing support 31 with an opening facing forward and is sleeved outside the belt 52 without contact, an avoiding notch 321 suitable for avoiding the belt 52 is arranged on one side of the rear shell 32, and the belt 52 passes through the avoiding notch 321 and is connected with the motor 4.

In some embodiments of the invention, as shown in fig. 2 and 11, the gear transmission mechanism 6 comprises: the planetary gear mechanism comprises an inner gear ring 61, a sun gear 62, a planetary carrier assembly 63 and planetary gears 64, wherein the inner gear ring 61 is connected with the belt pulley 51 and coaxially arranged, when the clutch mechanism 7 is matched with the inner gear ring 61, the wave wheel shaft 1 and the roller shaft sleeve 2 synchronously rotate, the sun gear 62 is connected to the wave wheel shaft 1 and coaxially arranged with the wave wheel shaft 1, the sun gear 62 is positioned on the inner side of the inner gear ring 61, the planetary carrier assembly 63 is provided with a plurality of planetary gear shafts 6315, the planetary carrier assembly 63 is sleeved on the periphery of the wave wheel shaft 1 and can rotate relative to the wave wheel shaft 1, the planetary gears 64 are respectively sleeved on the plurality of planetary gear shafts 6315 in a rotating mode, the plurality of planetary gears 64 are positioned between the inner gear ring 61 and the sun gear 62 and are arranged around.

It should be noted that when the clutch mechanism 7 is matched with the inner gear ring 61, the planet carrier assembly 63 is fixedly connected with the inner gear ring 61, so that the inner gear ring 61, the planet carrier assembly 63, the planet gear 64, the sun gear 62 and the wave wheel shaft 1 rotate at the same angular speed, and because the inner gear ring 61 and the roller shaft sleeve 2 are connected with the belt pulley 51 and coaxially arranged, the wave wheel shaft 1 and the roller shaft sleeve 2 rotate synchronously; when the clutch mechanism 7 is matched with the bracket component 3, the planet carrier component 63 is fixedly connected with the bracket component 3, and the belt transmission mechanism 5 transmits the power of the motor 4 to the roller shaft sleeve 2 to drive the roller shaft sleeve 2 to rotate; meanwhile, the belt transmission mechanism 5 transmits the power of the motor 4 to the inner gear ring 61 to be matched, the planet gear 64 is driven to rotate around the planet gear shaft 6315 through the inner gear ring 61, the planet gear 64 drives the central wheel to rotate, the central wheel drives the wave gear shaft 1 to rotate, and the wave gear shaft 1 and the roller shaft sleeve 2 rotate in a differential mode.

Alternatively, as shown in fig. 2, a plurality of planetary gears 64 are in a group, and each planetary gear 64 is directly meshed with the inner gear ring 61 and the sun gear 62. Thus, when the clutch mechanism 7 is matched with the bracket component 3, the wave wheel shaft 1 and the roller shaft sleeve 2 can rotate in a reverse differential speed mode.

In some alternative embodiments of the invention, the plurality of planet gears 64 are two sets of intermeshing gears, one of the two sets of planet gears 64 being in mesh with the annulus gear 61 and the other set being in mesh with the sun gear 62. Thus, when the clutch mechanism 7 is engaged with the carrier assembly 3, the impeller shaft 1 and the roller sleeve 2 rotate in the same direction and at different speeds. For example, the plurality of planet gears 64 are divided into a first set of planet gears that are disposed adjacent the center of the inner ring gear 61 and that mesh with the sun gear 62, and a second set of planet gears that are disposed away from the center of the inner ring gear 61 and that mesh with the inner ring gear 61 and the first set of planet gears, respectively.

Alternatively, as shown in fig. 6, an avoiding groove 28 is formed on the inner peripheral wall of the second end of the roller shell 2, the avoiding groove 28 penetrates through the axial end face of the second end of the roller shell 2, a part of the planet carrier assembly member 63 is accommodated in the avoiding groove 28, and the planet carrier assembly member 63 is spaced apart from the roller shell 2. Thereby, the axial dimension of the drive system 10 is advantageously reduced.

In some alternative embodiments of the present invention, as shown in fig. 1, the ring gear 61 is integrally injection-molded on the pulley 51. Therefore, the structure formed by integral injection molding can not only ensure the structure and performance stability of the inner gear ring 61 and the belt pulley 51, but also omit redundant assembly parts and connection procedures, greatly improve the assembly efficiency between the inner gear ring 61 and the belt pulley 51, and ensure the connection reliability between the inner gear ring 61 and the belt pulley 51.

Alternatively, as shown in fig. 1, 2 and 7, the clutch mechanism 7 includes a clutch sliding sleeve 71, an electromagnetic coil assembly 72 and a clutch spring 73, a third spline portion 711 is formed on an inner peripheral wall of the clutch sliding sleeve 71, the carrier assembly 63 includes a carrier 631 and a cover plate 632 connected to each other, the ring gear 61 is rotatably provided between an outer peripheral wall of the carrier 631 and an inner peripheral wall of the cover plate 632, a mounting space is defined between the carrier 631 and the cover plate 632, the sun gear 62 and the plurality of planet gears 64 are located in the mounting space, a fourth spline portion 6321 engaged with the third spline portion 711 is formed on an outer peripheral wall of the cover plate 632, and the clutch sliding sleeve 71 is slidable between a first position and a second position in the axial direction relative to the cover plate 632, whereby, on the one hand, movement of the clutch sliding sleeve 71 in the axial direction relative to the cover plate 632 can be guided by engagement of the third spline portion 711 and the fourth spline portion 6321, on the other hand, the sliding sleeve 71 cannot rotate relative to the cover plate 632, so that the sliding sleeve 71 slides stably and reliably between the first position and the second position in the axial direction. For example, the planet carrier 631 and the cover plate 632 are fixedly connected through the support column 6311 and the support column through hole 6323.

Further, when the electromagnetic coil assembly 72 is powered on, the electromagnetic coil assembly 72 is adapted to drive the sliding sleeve 71 to slide in a first direction (for example, front as shown in fig. 1) along the axial direction, the clutch spring 73 is adapted to drive the sliding sleeve 71 to slide in a second direction (for example, rear as shown in fig. 1) opposite to the first direction, when the sliding sleeve 71 slides in the first direction to the first position, the sliding sleeve 71 is engaged with the ring gear 61, and when the sliding sleeve 71 slides in the second direction to the second position (the position where the sliding sleeve 71 is located as shown in fig. 1), the sliding sleeve 71 is engaged with the bracket assembly 3. Therefore, the sliding of the clutch sliding sleeve 71 is stable and reliable, when the clutch sliding sleeve 71 is matched with the inner gear ring 61, the synchronous rotation of the impeller shaft 1 and the roller shaft sleeve 2 can be realized, and when the clutch sliding sleeve 71 is matched with the bracket component 3, the differential rotation of the impeller shaft 1 and the roller shaft sleeve 2 is realized.

Alternatively, as shown in fig. 7, the clutch sliding sleeve 71 includes a non-magnetic tooth 714 and a magnetic sleeve 715, which are engaged and integrally formed in a radial direction, and the magnetic sleeve 715 is disposed at an outer ring of the non-magnetic tooth 714. A fourth spline part 6321 is fixedly arranged on the outer ring of the cover plate 632, and the clutch sliding sleeve 71 is axially slidably sleeved on the outer side of the fourth spline part 6321 of the cover plate 632 through a third spline part 711 fixedly arranged on the inner hole; the two ends of the non-magnetic-conductive tooth-shaped element 714 are respectively provided with a first clutch tooth 712 and a third clutch tooth 713; an annular flange 612 is integrally arranged on the end face of the inner gear ring 61, which faces away from the gear part, and second clutch teeth 611 which are uniformly distributed along the circumferential direction are fixedly arranged on one side, facing the gear transmission mechanism 6, of the flange 612.

Alternatively, the second clutch teeth 611 are integrally injection-molded with the ring gear 61, and the fourth clutch teeth 322 are integrally injection-molded with the rear case 32.

Alternatively, as shown in fig. 1, the planet carrier 631 and the cover plate 632 are hollow structures, the inner holes are respectively fixedly provided with the third bushing 83 and the fourth bushing 84, and are rotatably sleeved on the wave wheel shaft 1 through the third bushing 83 and the fourth bushing 84, and the sun gear 62 is arranged between the third bushing 83 and the fourth bushing 84; the third bushing mounting portion 6312 integrally provided with the carrier 631 is inserted into the escape groove 28 of the roller sleeve 2 and axially restrained to the first shoulder 14. The double-end support improves the connection rigidity of the whole gear transmission mechanism 6, avoids the insufficient rigidity caused by single-side support, can reduce the washing noise, improves the stability of the whole machine, and simultaneously compresses the axial dimension by the arrangement of the avoidance groove 28.

Alternatively, as shown in fig. 1, 2 and 11, the planet carrier assembly 63 includes a planet carrier 631 and a cover plate 632 that are fixedly connected, a plurality of planet shafts 6315 are distributed between the planet carrier 631 and the cover plate 632 along the circumferential direction, the ring gear 61 is coaxially and fixedly disposed on the pulley 51, the cover plate 632 is in a cup-shaped structure, the planet carrier 631 is located inside the cup-shaped structure, the ring gear 61 is disposed between the outer ring of the planet carrier 631 and the inner wall of the cover plate 632, and the inner circumferential wall of the ring gear 61 is in meshing transmission with the planet gears 64.

Further, as shown in fig. 8 and 9, a plurality of first mounting holes 6313 and second mounting holes 6322 are respectively disposed between the planet carrier 631 and the cover plate 632 in a circumferentially distributed manner, the first mounting holes 6313 and the second mounting holes 6322 are correspondingly disposed, a plurality of planet shafts 6315 are mounted in the middle, the planet gears 64 are freely sleeved on the planet shafts 6315 and are meshed with the sun gear 62 to drive towards the inside, the cover plate 632 is in a cup-shaped structure, the planet carrier 631 is located inside the cup-shaped structure, the inner gear ring 61 is coaxially disposed between an outer ring of the planet carrier 631 and an inner wall of the cover plate 632, and inner teeth of the inner gear ring 61 are meshed with the planet gears 6412 to drive.

Further, as shown in fig. 8 and 11, the outer ring of the planet carrier 631 is integrally provided with a first oil retaining portion 6314 protruding outwards in an annular shape, the inner ring of the inner ring gear 61 is integrally provided with a second oil retaining portion 615 protruding inwards in an annular shape, and a gap between the first oil retaining portion 6314 and the second oil retaining portion 615 is not more than 1mm when the assembly is completed; the second oil retaining portion 615, the first oil retaining portion 6314, the cover plate 632 and the ring gear 61 body form a labyrinth structure, so that the grease in the gear transmission mechanism 6 is prevented from splashing in the operation process.

In some alternative embodiments of the present invention, as shown in fig. 1, the clutch spring 73 is disposed between the bracket assembly 3 and the clutch sliding sleeve 71. It should be noted that, when the washing machine 100 is in a non-operating state, the clutch sliding sleeve 71 is engaged with the ring gear 61, the clutch spring 73 is pressed, and the clutch sliding sleeve 71 is located at the dehydration station. When washing, the electromagnetic coil assembly 72 is electrified, the clutch sliding sleeve 71 moves towards the direction far away from the inner gear ring 61 under the action of electromagnetic force and compresses the clutch spring 73, so that the clutch sliding sleeve 71 is matched with the bracket assembly 3, the planet carrier assembly 63 is braked, the gear transmission mechanism 6 is shifted to form a fixed-axis gear train, and the impeller shaft 1 and the roller shaft sleeve 2 rotate at a differential speed; when the electromagnetic coil component 72 is de-energized during dehydration, the clutch sliding sleeve 71 is reset under the action of the clutch spring 73, the clutch sliding sleeve 71 is matched with the inner gear ring 61, at the moment, the planet carrier component 63 is fixedly connected with the inner gear ring 61, and the whole gear transmission mechanism 6 runs at the same speed, so that the impeller shaft 1 and the roller shaft sleeve 2 synchronously rotate. Therefore, the electromagnetic coil assembly 72 is not electrified in the dehydration mode, so that when the power is off in dehydration, the clutch sliding sleeve 71 can be prevented from colliding with the inner gear ring 61 to cause damage. For example, the clutch bush 71 is provided with a spring mounting portion 716, and the clutch spring 73 is provided between the spring mounting portion 716 and the rear case 32.

Alternatively, the clutch spring 73 is provided between the pulley 51 and the clutch sleeve 71. It should be noted that, when the washing machine 100 is in a non-operating state, the clutch sliding sleeve 71 is engaged with the bracket assembly 3, the clutch spring 73 is pressed, and the clutch sliding sleeve 71 is located at the washing station. When the dewatering is carried out, the electromagnetic coil assembly 72 is electrified, the clutch sliding sleeve 71 moves towards the direction far away from the bracket assembly 3 under the action of electromagnetic force, and the clutch spring 73 is compressed, so that the clutch sliding sleeve 71 is matched with the inner gear ring 61, at the moment, the planet carrier assembly 63 is fixedly connected with the inner gear ring 61, and the whole gear transmission mechanism 6 runs at the same speed, so that the impeller shaft 1 and the roller shaft sleeve 2 synchronously rotate; when the electromagnetic coil assembly 72 is powered off during washing, the clutch sliding sleeve 71 is reset under the action of the clutch spring 73, the clutch sliding sleeve 71 is matched with the bracket assembly 3, the planet carrier assembly 63 is braked, the gear transmission mechanism 6 is shifted to form a fixed-axis gear train, and the impeller shaft 1 and the roller shaft sleeve 2 rotate in a differential mode. Therefore, the electromagnetic coil assembly 72 is not energized during washing, and the energy consumption of the washing machine 100 can be reduced. For example, as shown in fig. 7, the clutch bush 71 is provided with a spring mounting portion 716, and the clutch spring 73 is provided between the spring mounting portion 716 and the pulley 51.

In some alternative embodiments of the present invention, as shown in fig. 7, a plurality of first clutch teeth 712 arranged along the circumferential direction are formed on the first axial end surface of the clutch sliding sleeve 71, a second clutch tooth 611 matched with the plurality of first clutch teeth 712 is formed on the inner gear ring 61, a plurality of third clutch teeth 713 arranged along the circumferential direction are formed on the second axial end surface of the clutch sliding sleeve 71, and a fourth clutch tooth 322 matched with the plurality of third clutch teeth 713 is formed on the bracket component 3. Therefore, the first clutch teeth 712 and the second clutch teeth 611 are clamped, so that the matching reliability between the clutch sliding sleeve 71 and the inner gear ring 61 is improved, and the matching reliability between the clutch sliding sleeve 71 and the bracket assembly 3 is improved through the matching of the third clutch teeth 713 and the fourth clutch teeth 322.

Alternatively, as shown in fig. 7, the first clutch teeth 712 and the third clutch teeth 713 are each formed in a stepped shape in the axial direction of the clutch sliding sleeve 71. Therefore, on one hand, the matching area of the first clutch teeth 712 and the second clutch teeth 611 is increased, and the reliability of matching between the clutch sliding sleeve 71 and the inner gear ring 61 is further improved; on the other hand, step-shaped teeth are easy to mesh, the full height of the teeth is small, and the clutch reliability and the compression axial height can be effectively controlled. For example, each of the first clutch tooth 712 and the third clutch tooth 713 is composed of a first straight tooth and a second straight tooth, the first straight tooth and the second straight tooth are perpendicular to each other, and projections of the first clutch tooth 712 and the third clutch tooth 713 in the axial direction are both stepped.

Further, as shown in FIG. 1, a fifth bushing 85 is press fit within the internal bore of the rear housing 32, and the planet carrier assembly member 63 is pivotally mounted within the internal bore of the fifth bushing 85 via a fourth bushing mount 6324. Preferably, the first to fifth bushings 81 to 85 are made of an oil-impregnated bearing material.

As shown in fig. 1 to 11, a drum washing machine 100 according to an embodiment of the present invention includes: the washing machine comprises an outer barrel 20, a pulsator 40, a rotary drum 30 and the driving system 10 of the washing machine 100, wherein the rotary drum 30 is rotatably arranged in the outer barrel 20, the pulsator 40 is rotatably arranged at the bottom of the rotary drum 30, the first end of a pulsator shaft 1 is connected with the pulsator 40, the first end of a rotary drum shaft sleeve 2 is connected with the rotary drum 30, a bracket assembly 3 is connected with the outer barrel 20, and a motor 4 is connected with the outer barrel 20.

According to the drum washing machine 100 of the embodiment of the present invention, the driving system 10 of the washing machine 100 is provided, so that the motor 4 is an inner rotor motor, and the power of the motor 4 is transmitted to the inner gear ring 61 through the belt 52 and the belt pulley 51, thereby reducing the cost and energy consumption of the motor 4 on the basis of ensuring the starting torque of the washing machine 100, and thus facilitating the cost and energy consumption of the driving system 10, and compared with the conventional method of fixing the motor on the motor shaft, the rigidity of the driving system 10 is facilitated to be improved and the axial size of the driving system 10 is facilitated to be reduced by connecting the belt pulley 51 with the second end of the drum sleeve 2, and in addition, when the clutch mechanism 7 is engaged with the gear transmission mechanism 6, the impeller shaft 1 and the drum sleeve 2 rotate synchronously, when the clutch mechanism 7 is engaged with the bracket assembly 3, the impeller shaft 1 and the drum sleeve 2, thereby switching the pulsator shaft 1 and the drum sleeve 2 between a synchronous rotation mode and a differential rotation mode, and thus enabling the washing machine 100 to be adapted to laundry of different materials.

For example, as shown in fig. 1, when the clutch mechanism 7 fixedly connects the carrier assembly 63 with the rear housing 32, the motor 4 transmits the power to the ring gear 61 in a speed-reducing and distance-increasing manner through the belt 52, the ring gear 61 transmits the power to the sun gear 62 in a speed-reducing and distance-increasing manner through the planetary gears, and the sun gear 62 and the ring gear 61 drive the pulsator 40 and the drum 30 to run at a different speed through the drum shaft sleeve 2 and the pulsator shaft 1 respectively; when the clutch mechanism 7 fixedly connects the inner gear ring 61 and the planet carrier assembly 63, the whole gear transmission mechanism 6 operates at the same speed, the motor 4 transmits power to the inner gear ring 61, and then the impeller 40 and the roller 30 are driven to operate at the same speed through the gear transmission mechanism 6.

In some embodiments of the invention, the drum washing machine 100 can be switched between a dual output mode and a single output mode. It should be noted that, by controlling whether the pulsator 40 and the drum 30 are in a differential operation state during washing, the purpose of switching between the single-output washing mode and the dual-output washing mode can be achieved, and the drum washing machine 100 capable of switching between the single-output washing mode and the dual-output washing mode according to the washing requirements is realized, so that the drum washing machine 100 can adapt to clothes of different materials.

Specifically, the dual output mode is: under the washing working condition, the motor 4 runs at a low rotating speed, the clutch mechanism 7 is matched with the bracket component 3, the belt pulley 51 drives the rotary drum 30 to run at a constant speed ratio, the belt pulley 51 drives the impeller 40 to run through the gear transmission mechanism 6, the impeller shaft 1 and the rotary drum shaft sleeve 2 rotate at a differential speed, and the rotating speed ratio of the impeller 40 to the rotary drum 30 is the transmission ratio of the gear transmission mechanism 6, at the moment, the washing machine 100 is in a double-output washing state, has strong washing capacity and can wash stubborn stains or clothes made of washing-resistant materials; under the dehydration working condition, the motor 4 runs at a high speed, the clutch mechanism 7 is matched with the gear transmission mechanism 6, the impeller shaft 1 and the roller shaft sleeve 2 rotate synchronously, and the impeller 40 and the roller 30 run at the same high speed under the driving of the motor 4 through the belt pulley 51.

Specifically, the single output mode is: under the washing working condition, the motor 4 runs at a low rotating speed, the clutch mechanism 7 is matched with the gear transmission mechanism 6, the impeller 40 and the roller 30 run at the same speed at a low speed under the driving of the motor 4 through the belt pulley 51, and at the moment, the washing machine 100 is in a single-output washing state, has the advantage of not damaging clothes, and can wash clothes such as cashmere or silk and the like needing to be washed gently; under the dehydration working condition, the motor 4 runs at a high speed, the clutch mechanism 7 is matched with the gear transmission mechanism 6, the impeller shaft 1 and the roller shaft sleeve 2 rotate synchronously, and the impeller 40 and the roller 30 run at the same high speed under the driving of the motor 4 through the belt pulley 51. At the moment, the clutch mechanism 7 does not switch the work positions during elution and conversion, and can be realized through an electric control program.

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 driving system of a washing machine, the washing machine comprising the driving system, an outer tub, a drum and a pulsator, the drum being rotatably provided in the outer tub, the pulsator being rotatably provided at a bottom of the drum, the driving system comprising:

the first end of the impeller shaft is suitable for being connected with the impeller;

the roller shaft sleeve is sleeved on the periphery of the impeller shaft, the impeller shaft can rotate relative to the roller shaft sleeve, and the first end of the roller shaft sleeve is suitable for being connected with the roller;

the roller shaft is sleeved on the support assembly and can rotate relative to the support assembly, and the support assembly is suitable for being connected with the outer barrel;

the motor is an inner rotor motor and is suitable for being connected with the outer barrel;

the belt transmission mechanism comprises a belt pulley and a belt, one end of the belt is sleeved on the outer peripheral side of an output shaft of the motor, the other end of the belt is sleeved on the outer peripheral side of the belt pulley, and the belt pulley is connected with the second end of the roller shaft sleeve;

the second end of the impeller shaft is connected with the belt transmission mechanism through the gear transmission mechanism;

the clutch mechanism is selectively matched with one of the gear transmission mechanism and the bracket assembly, and when the clutch mechanism is matched with the gear transmission mechanism, the wave wheel shaft and the roller shaft sleeve synchronously rotate; when the clutch mechanism is matched with the bracket component, the wave wheel shaft and the roller shaft sleeve rotate at a differential speed.

2. A drive system of a washing machine as claimed in claim 1 wherein the pulley has a central bore with a first splined portion formed on an inner peripheral wall thereof, the second end of the drum sleeve has a pulley coupling portion which fits within the central bore, and the pulley coupling portion has a second splined portion formed thereon which fits with the first splined portion.

3. The driving system of a washing machine as claimed in claim 1, wherein the bracket assembly includes a bearing bracket and a rear housing connected to each other, a bearing is provided on the bearing bracket, the bearing housing is provided at the outer periphery of the drum shaft sleeve, the rear housing is provided at one axial side of the bearing bracket, an accommodating space is defined between the bearing bracket and the rear housing, and the belt transmission mechanism, the gear transmission mechanism and the clutch mechanism are all located in the accommodating space.

4. A drive system for a washing machine as claimed in claim 3 wherein the bearing support is an integrally formed part.

5. The drive system of a washing machine as claimed in claim 3, wherein an escape notch is formed on the outer peripheral wall of the rear case, and one end of the belt passes through the escape notch and is fitted over the outer peripheral side of the output shaft.

6. The driving system of a washing machine as claimed in any one of claims 1 to 5, wherein the gear transmission mechanism comprises:

the inner gear ring is connected with the belt pulley and coaxially arranged, and when the clutch mechanism is matched with the inner gear ring, the wave wheel shaft and the roller shaft sleeve synchronously rotate;

the sun wheel is connected to the wave wheel shaft and is coaxially arranged with the wave wheel shaft, and the sun wheel is positioned on the inner side of the inner gear ring;

the planet carrier assembly is provided with a plurality of planet wheel shafts, and the planet carrier assembly is sleeved on the periphery of the impeller shaft and can rotate relative to the impeller shaft;

the planetary wheels are arranged between the inner gear ring and the sun gear and arranged around the periphery of the sun gear, and are engaged with the inner gear ring and the sun gear.

7. The drive system of a washing machine as claimed in claim 6 wherein a plurality of the planets is in a group, each of the planets being in direct engagement with the annulus and the sun.

8. The drive system of a washing machine as claimed in claim 6 wherein the plurality of planet gears are in two sets which are in mesh with each other, one of the two sets being in mesh with the annulus gear and the other set being in mesh with the sun gear.

9. A drive system for a washing machine as claimed in claim 6 wherein an escape recess is formed in the inner peripheral wall of the second end of the drum sleeve, the escape recess extending through an axial end face of the second end of the drum sleeve, a portion of the planet carrier assembly member being received in the escape recess and the planet carrier assembly member being spaced from the drum sleeve.

10. The driving system of a washing machine as claimed in claim 6, wherein the ring gear is integrally injection-molded on the pulley.

11. The driving system of a washing machine as claimed in claim 6, wherein the clutch mechanism comprises:

the clutch sliding sleeve is characterized in that a third spline part is formed on the inner peripheral wall of the clutch sliding sleeve, the planet carrier assembly comprises a planet carrier and a cover plate which are connected with each other, an inner gear ring is rotatably arranged between the outer peripheral wall of the planet carrier and the inner peripheral wall of the cover plate, an installation space is defined between the planet carrier and the cover plate, the sun gear and the plurality of planet gears are both positioned in the installation space, a fourth spline part matched with the third spline part is formed on the outer peripheral wall of the cover plate, and the clutch sliding sleeve is slidable between a first position and a second position relative to the cover plate along the axial direction;

the electromagnetic coil assembly is suitable for driving the clutch sliding sleeve to slide towards a first direction along the axial direction when the electromagnetic coil assembly is electrified;

the clutch spring is used for driving the clutch sliding sleeve to slide towards a second direction opposite to the first direction, the clutch sliding sleeve is matched with the inner gear ring when the clutch sliding sleeve slides towards the first direction to the first position, and the clutch sliding sleeve is matched with the support assembly when the clutch sliding sleeve slides towards the second direction to the second position.

12. The drive system of a washing machine as claimed in claim 11, wherein the clutch spring is provided between the bracket assembly and the clutch sleeve.

13. The drive system of a washing machine as claimed in claim 11, wherein the clutch spring is provided between the pulley and the clutch bush.

14. The driving system of a washing machine as claimed in claim 11, wherein a plurality of first clutch teeth are formed on a first axial end surface of the clutch sliding sleeve, a plurality of second clutch teeth matched with the first clutch teeth are formed on the inner gear ring, a plurality of third clutch teeth are formed on a second axial end surface of the clutch sliding sleeve, and a plurality of fourth clutch teeth matched with the third clutch teeth are formed on the bracket assembly.

15. The driving system of a washing machine as claimed in claim 14, wherein the first clutch tooth and the third clutch tooth are each formed to be stepped in an axial direction of the clutch slide.

16. A drum washing machine characterized by comprising:

an outer tub;

a drum rotatably provided in the tub;

the impeller is rotatably arranged at the bottom of the roller;

the drive system of a washing machine as claimed in any one of claims 1 to 15, wherein a first end of the pulsator shaft is connected to the pulsator, a first end of the drum bushing is connected to the drum, the rack assembly is connected to the tub, and the motor is connected to the tub.