CN113564875A - Power transmission device, clothes treatment equipment and control method thereof - Google Patents
Power transmission device, clothes treatment equipment and control method thereof Download PDFInfo
- Publication number
- CN113564875A CN113564875A CN202010351193.0A CN202010351193A CN113564875A CN 113564875 A CN113564875 A CN 113564875A CN 202010351193 A CN202010351193 A CN 202010351193A CN 113564875 A CN113564875 A CN 113564875A
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- Prior art keywords
- shaft
- magnetorheological fluid
- power transmission
- power input
- transmission device
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/30—Driving arrangements
- D06F37/40—Driving arrangements for driving the receptacle and an agitator or impeller, e.g. alternatively
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
- D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
- D06F33/40—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of centrifugal separation of water from the laundry
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
Abstract
The embodiment of the application provides a power transmission device, clothes treatment equipment and a control method thereof, wherein the power transmission device comprises a bottom plate assembly, a power input shaft, a gear speed reducing mechanism, a wave wheel shaft, a dewatering shaft and a magnetorheological fluid clutch, and the gear speed reducing mechanism is arranged on the second side of the bottom plate assembly; the second end of the impeller shaft and the power input shaft are in power transmission through a gear reduction mechanism; the magnetorheological fluid clutch is arranged on the second side of the bottom plate component, magnetorheological fluid is packaged in the magnetorheological fluid clutch, and the power input shaft penetrates through the magnetorheological fluid; the second end of the dewatering shaft and the power input shaft are switched between driving connection and disconnection through a magnetorheological fluid clutch. The power transmission device of the embodiment of the application has the advantages of simple structure and low failure rate; the magnetorheological fluid clutch is arranged on the second side, away from the water containing barrel, of the bottom plate assembly, the requirement on the waterproof grade of the magnetorheological fluid clutch can be lowered, and moreover, the installation space is large, and installation is facilitated.
Description
Technical Field
The present application relates to the field of washing machine technology, and more particularly, to a power transmission device, a laundry treating apparatus, and a control method thereof.
Background
The existing full-automatic clothes treatment equipment is provided with a clutch, wherein the clutch is used for switching between washing and dewatering, specifically, a wave wheel rotates during washing, and the wave wheel and an inner drum rotate simultaneously during dewatering. The current common clutch realizes the conversion between washing and dewatering through a mechanical structure, but because the mechanical structure is complex and easy to break down, abnormal locking of a holding spring or abnormal sound caused by insufficient locking often occurs in the actual operation process. Therefore, the novel clutch is designed to realize the switching between washing and dewatering through the magnetorheological fluid, reduce the failure rate of the clutch and improve the user experience.
Disclosure of Invention
In view of the above, embodiments of the present application are expected to provide a laundry treating apparatus with a simple structure and reliable clutching, and a power transmission device and a control method thereof.
To achieve the above object, a first aspect of embodiments of the present application provides a power transmission device for a laundry treating apparatus, the power transmission device including a bottom plate assembly, a power input shaft, a gear reduction mechanism, a pulsator shaft, a dehydrating shaft, and a magnetorheological fluid clutch, the bottom plate assembly including a first side for sealing a tub of the laundry treating apparatus and a second side facing away from the tub; the gear reduction mechanism is arranged on the second side of the bottom plate component; the first end of the impeller shaft is used for being connected with an impeller of the clothes treatment equipment, and the second end of the impeller shaft and the power input shaft are in power transmission through the gear speed reduction mechanism; the first end of the dewatering shaft is used for being connected with an inner drum of the clothes processing equipment; the magnetorheological fluid clutch is arranged on the second side of the bottom plate component, magnetorheological fluid is packaged in the magnetorheological fluid clutch, and the power input shaft penetrates through the magnetorheological fluid; the second end of the dehydration shaft and the power input shaft are switched between driving connection and disconnection through the magnetorheological fluid clutch.
In some embodiments, the dewatering shaft is a hollow shaft, the dewatering shaft is sleeved on the outer surface of the impeller shaft, and the impeller shaft and the dewatering shaft are coaxially arranged.
In some embodiments, a surface of a portion of the impeller shaft located in the magnetorheological fluid is formed with at least one keyway; and/or the surface of the part of the impeller shaft in the magnetorheological fluid is a rough surface.
In some embodiments, the power transmission device includes a mounting bracket attached to the second side of the floor assembly, the mounting bracket having a receiving space in which the gear reduction mechanism is disposed; the magnetorheological fluid clutch is arranged on one side, departing from the bottom plate assembly, of the mounting frame.
In some embodiments, the magnetorheological fluid clutch includes a housing and at least one pair of positive and negative magnetic poles, the magnetorheological fluid is enclosed in the housing, and the positive and negative magnetic poles are disposed on opposite sides of the housing and fixedly connected to the mounting bracket; the gear reduction mechanism comprises a mounting shell and a gear set arranged in the mounting shell; the second end of the dewatering shaft extends into the accommodating space and is fixedly connected with the top end of the mounting shell, and the top end of the shell extends into the accommodating space and is fixedly connected with the bottom end of the mounting shell.
In some embodiments, the mounting case is open to a side of the magnetorheological clutch, and a portion of the housing extending into the accommodating space is configured to support the gear set at the open mounting case.
In some embodiments, the housing includes a housing main body and a support plate, the housing main body is formed with a shrink cylinder portion along two axial ends of the power input shaft, the support plate is disposed on a top portion of one of the shrink cylinder portions, the support plate is located in the accommodating space and supported on a bottom wall of the accommodating space, and the gear set is supported on the support plate.
In some embodiments, the magnetorheological fluid clutch includes a bearing assembly disposed in the contracting cylinder portion, the bearing assembly includes a sealing ring and a first bearing, the sealing ring and the first bearing are both sleeved on the power input shaft, the first bearing is pressed against a side of the sealing ring facing away from the magnetorheological fluid, and the sealing ring seals a gap between the power input shaft and an inner wall of the contracting cylinder portion.
In some embodiments, the mounting bracket is kept away from the one end of bottom plate subassembly is provided with dodges the mouth, one of them shrink section of thick bamboo portion wears to locate in dodging the mouth, power transmission device includes first bearing, first bearing housing is located on the shrink section of thick bamboo portion and press from both sides and locate shrink section of thick bamboo portion with dodge between the inner wall of mouth.
A second aspect of the embodiments of the present application provides a laundry processing apparatus, including a pulsator, an inner tub, a pulley, a motor, a transmission belt, a control device, and any one of the above power transmission devices, the pulsator being rotatably disposed at a bottom of the inner tub; the inner cylinder is rotatably arranged in the water containing barrel, and a mounting hole is formed in the bottom of the water containing barrel; the impeller shaft and the dewatering shaft extend into the water containing barrel through the mounting hole, the bottom plate assembly seals the mounting hole, the first end of the impeller shaft is fixedly connected with the impeller, and the first end of the dewatering shaft is fixedly connected with the inner barrel; the belt wheel is fixedly connected to the power input shaft; the transmission belt is connected between the belt wheel and the motor; the control device is electrically connected with the magnetorheological fluid clutch.
A third aspect of an embodiment of the present application provides a control method of any one of the above-mentioned clothes treatment apparatuses, including the steps of:
acquiring a dehydration instruction;
controlling the magnetorheological fluid clutch to be electrified, wherein the magnetorheological fluid clutch is used for driving and connecting the power input shaft and the dehydration shaft so as to drive the impeller and the inner cylinder to synchronously rotate;
and after the dehydration process is finished, controlling the magnetorheological fluid clutch to be powered off, and disconnecting the power input shaft and the dehydration shaft by the magnetorheological fluid clutch.
The power transmission device of the embodiment of the application has the advantages of simple structure, no relative movement of mechanical parts in the clutch process, low failure rate and high working reliability; in addition, the magnetorheological fluid clutch is arranged on the second side, away from the water containing barrel, of the bottom plate assembly, and the magnetorheological fluid clutch cannot be soaked in water, so that the requirement on the waterproof grade of the magnetorheological fluid clutch can be lowered; moreover, the second side of the bottom plate assembly, which is far away from the water containing barrel, is provided with a larger installation space, so that the installation is convenient, and the size limitation on the magnetorheological fluid clutch is also reduced.
Drawings
Fig. 1 is a schematic structural view of a power transmission device according to an embodiment of the present application;
FIG. 2 is a schematic combination of the power input shaft, gear reduction mechanism, mounting bracket and magnetorheological clutch of FIG. 1, with one set of bearing assemblies omitted;
fig. 3 is a schematic view showing the power transmission device shown in fig. 1 in cooperation with a pulley and a belt.
Description of the reference numerals
A power transmission device 1; a floor panel assembly 11; a power input shaft 12; a key groove 12 a; a gear reduction mechanism 13; a mounting case 131; a gear set 132; a sun gear 1321; planet wheels 1322; a ring gear 1323; a wave wheel shaft 14; a dehydrating shaft 15; a magnetorheological fluid clutch 16; the magnetorheological fluid 161; a housing 162; a housing body 1621; a collapsible tube portion 16211; first step surface 1621 a; second step surface 1621 b; a support plate 1622; a bearing assembly 163; a first bearing 1631; a seal ring 1632; a positive magnetic pole 164; a negative magnetic pole 165; a mounting frame 17; the accommodating space 17 a; an escape opening 17 b; a second bearing 181; a third bearing 182; the sliding bearing 183; a pulley 21; a conveyor belt 22; lock nut 23
Detailed Description
It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.
In the description of the embodiments of the present application, the "up" and "down" orientations or positional relationships are based on the orientations or positional relationships shown in fig. 1, it is to be understood that these orientation terms are merely for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the present application.
An embodiment of the present application provides a laundry processing apparatus, please refer to fig. 3, including a pulsator, an inner cylinder, a water tub, a power transmission device 1, a motor, a pulley 21, and a conveyor belt 22. The impeller is rotatably arranged at the bottom of the inner barrel, and the inner barrel is rotatably arranged in the water containing barrel. That is, the inner tub is a perforated inner tub, and washing water is contained by means of the tub.
Specifically, the motor drives the pulley 21 to rotate through the conveyor belt 22, the pulley 21 transmits power to the power transmission device 1, and the power transmission device 1 drives the pulsator and the inner drum to rotate. That is, the motor in the embodiment of the present application is not a direct drive motor, and may be an induction motor, for example.
In the washing process, the power transmission device 1 drives the impeller to rotate, and it should be noted that the inner cylinder can be in a free state or a stationary static state at the moment, which is not limited herein; in the dehydration process, the power transmission device 1 drives the inner barrel and the impeller to synchronously rotate at high speed, and the clothes are dehydrated by utilizing centrifugal force.
Referring to fig. 1 and 2, the power transmission device 1 includes a base plate assembly 11, a power input shaft 12, a gear reduction mechanism 13, a pulsator shaft 14, a dehydrating shaft 15, a control device, and a magnetorheological fluid clutch 16. The control device is electrically connected to the magnetorheological clutch 16 to control the energization or de-energization of the magnetorheological clutch 16.
The floor assembly 11 includes a first side for sealing a tub of the laundry treating apparatus and a second side facing away from the tub, for example, in fig. 1, an upward side of the floor assembly 11 is the first side, and a downward side of the floor assembly 11 is the second side. Specifically, the bottom of the water containing barrel is provided with a mounting hole, the impeller shaft 14 and the dewatering shaft 15 extend into the water containing barrel from the lower part of the water containing barrel through the mounting hole, and the bottom plate assembly 11 seals the mounting hole to avoid water leakage at the mounting hole.
The gear reduction mechanism 13 is provided on the second side of the floor assembly 11. The impeller shaft 14 and the dewatering shaft 15 both penetrate the floor assembly 11. A first end of the pulsator shaft 14 is located at a first side of the base plate assembly 11 and is used for being connected with a pulsator of the laundry treating apparatus, a second end of the pulsator shaft 14 is located at a second side of the base plate assembly 11, and a second end of the pulsator shaft 14 and the power input shaft 12 are power-transmitted through the gear reduction mechanism 13, that is, the pulsator shaft 14 and the power input shaft 12 are not directly fixedly connected, and torque is transmitted through the gear reduction mechanism 13.
A first end of the dehydrating shaft 15 is located at a first side of the soleplate assembly 11 and is used for being connected with an inner drum of the clothes treating apparatus, and a second end of the dehydrating shaft 15 is located at a second side of the soleplate assembly 11.
The magnetorheological fluid clutch 16 is arranged on the second side of the bottom plate component 11, magnetorheological fluid 161 is packaged in the magnetorheological fluid clutch 16, and the power input shaft 12 penetrates through the magnetorheological fluid 161; the second end of the dehydrating shaft 15 is switched with the power input shaft 12 between driving connection and disconnection by a magnetorheological fluid clutch 16.
In the power transmission device 1 of the embodiment of the application, the magnetorheological fluid clutch 16 is arranged on the second side of the bottom plate assembly 11, which is away from the water containing barrel, that is, the magnetorheological fluid clutch 16 is not soaked in water, so that the requirement on the waterproof grade of the magnetorheological fluid clutch 16 can be reduced; in addition, the second side of the bottom plate assembly 11, which is away from the water tub, has a larger installation space, so that the installation of the magnetorheological fluid clutch 16 is facilitated, and the size limitation on the magnetorheological fluid clutch 16 is reduced.
Illustratively, the magnetorheological clutch 16 includes a housing 162 and at least one pair of positive and negative magnetic poles 164, 165, that is, the positive and negative magnetic poles 164, 165 are arranged in pairs. The housing 162 has a liquid storage chamber for storing the magnetorheological fluid 161, that is, the magnetorheological fluid 161 is enclosed within the housing 162. Disposed on laterally opposite sides of the exterior of the housing 162 are a positive magnetic pole 164 and a negative magnetic pole 165.
The working principle of the magnetorheological fluid clutch 16 in the embodiment of the application is as follows: when the magnetorheological fluid clutch 16 is not electrified, namely the positive magnetic pole 164 and the negative magnetic pole 165 are not electrified, the magnetorheological fluid 161 is in a Newtonian fluid state, and at the moment, the power input shaft 12 freely rotates in the magnetorheological fluid 161; when the magnetorheological fluid clutch 16 is electrified, namely the positive magnetic pole 164 and the negative magnetic pole 165 are electrified, the positive magnetic pole 164 and the negative magnetic pole 165 generate a magnetic field, the magnetorheological fluid 161 is in a solid-like form under the action of the magnetic field, a magnetic linkage is formed in the direction of the magnetic field, and when the power input shaft 12 rotates, the torque of the power input shaft 12 is transmitted to the dewatering shaft 15 by means of the magnetic pulling force of the magnetic linkage, so that the power input shaft 12 is in driving connection with the dewatering shaft 15. The magnetorheological fluid 161 has a response speed of millisecond level, good reversibility, high reliability, stable performance and low energy consumption, so that the power transmission device 1 of the embodiment of the application has the advantages of simple structure, no relative movement of mechanical parts in the clutch process, low failure rate, low noise and high working reliability.
When the laundry treating apparatus does not require dehydration, the control device controls the magnetorheological fluid clutch 16 to be maintained in a de-energized state, and the power input shaft 12 and the dehydrating shaft 15 are maintained in a disconnected state. When dehydration is required, the control device controls the magnetorheological fluid clutch 16 to be electrified, the power input shaft 12 and the dehydration shaft 15 are switched to a driving connection state, at the moment, the power input shaft 12, the gear reduction mechanism 13, the magnetorheological fluid clutch 16 and the dehydration shaft 15 are combined into a rigid whole, and synchronous rotation of the impeller shaft 14 and the dehydration shaft 15 is realized, namely, the impeller and the inner cylinder synchronously rotate along the same direction at the same rotating speed during dehydration.
It should be noted that, in order to implement the dehydration of the clothes by using the centrifugal force, the rotation speed required by the inner drum during the dehydration process is relatively high, and the motor needs to have a relatively high rotation speed, so that a suitable transmission ratio needs to be set between the motor and the belt wheel 21. In order to output a large torque to the impeller shaft 14 at a low rotation speed, the gear reduction mechanism 13 is required to provide a proper transmission ratio between the power input shaft 12 and the impeller shaft 14, so that the impeller can have a proper low rotation speed and a sufficient torque.
The specific configuration of the impeller shaft 14 and the dewatering shaft 15 is not limited. Referring to fig. 1, in an embodiment, the dewatering shaft 15 is a hollow shaft, and the dewatering shaft 15 is sleeved on the outer surface of the power input shaft 12, so that the power transmission device 1 has a compact structure, and the power input shaft 12 and the dewatering shaft 15 are coaxially arranged, so that the pulsator and the inner cylinder rotate coaxially, and eccentric rotation is avoided.
In one embodiment, with continued reference to fig. 1, the power transmission device 1 further comprises at least two sliding bearings 183 disposed between the impeller shaft 14 and the dewatering shaft 15. Since the sliding bearing 183 is small in size in the radial direction, it takes up only a small installation space, and a small radial gap can be provided between the impeller shaft 14 and the dehydrating shaft 15, so that the power transmission device 1 is more compact in structure.
In one embodiment, referring to fig. 1, the power input shaft 12 and the impeller shaft 14 are arranged along a straight line, that is, the power input shaft 12 and the impeller shaft 14 are located on the same straight line and are axially spaced, and the gear reduction mechanism 13 is disposed at the axial spacing between the power input shaft 12 and the impeller shaft 14.
The specific structural form of the gear reduction mechanism 13 is not limited, and in an exemplary embodiment, referring to fig. 2, the gear reduction mechanism 13 includes a mounting shell 131 and a gear set 132 disposed in the mounting shell 131. The gear set 132 takes the form of a planetary gear set, and in particular, the gear set 132 includes a ring gear 1323, a sun gear 1321, and a plurality of planet gears 1322. The ring gear 1323 is fixed relative to the mounting housing 131, i.e. there is no relative movement between the ring gear 1323 and the mounting housing 131. Gear ring 1323 may be directly fixedly connected to mounting case 131, or may be indirectly fixedly connected to mounting case 131 through another structure.
The sun gear 1321 is located at the center of the ring gear 1323, the sun gear 1321 is coaxially and fixedly connected with the power input shaft 12, the plurality of planet wheels 1322 are clamped between the sun gear 1321 and the inner surface of the ring gear 1323, the plurality of planet wheels 1322 are arranged around the sun gear 1321 at intervals, and each planet wheel 1322 is simultaneously in meshing transmission with the sun gear 1321 and the ring gear 1323. The axes of the plurality of planet wheels 1322 may be fixedly connected to the second end of the impeller shaft 14 by a fixed frame or the like. During the washing process, the power input shaft 12 drives the sun gear 1321 to rotate, the sun gear 1321 drives the plurality of planet wheels 1322 to rotate, and the planet wheels 1322 further drive the wave wheel shaft 14 to rotate. In the dehydration process, under the action of the magnetorheological fluid clutch 16, the mounting shell 131 and the power input shaft 12 do not move relatively, the sun wheel 1321 and the planet wheel 1322 do not rotate, the gear reduction mechanism 13, the dehydration shaft 15 and the magnetorheological fluid clutch 16 form a rigid whole, and at the moment, the gear reduction mechanism 13 has no speed reduction function and only plays a role in transmitting torque at a constant speed.
The specific structure of the bottom plate assembly 11 is not limited as long as the mounting hole can be sealed. Note that, the bottom plate assembly 11 may be fastened to the tub by a fastener such as a screw, and the weight of the bottom plate assembly 11 is borne by the tub.
In order to improve the torque transmission effect between the power input shaft 12 and the magnetorheological fluid 161, in an embodiment, referring to fig. 2, at least one key groove 12a is formed on the surface of the part of the power input shaft 12 located in the magnetorheological fluid 161, and in the case that the magnetorheological fluid 161 is in the solid-like state, the key groove 12a can increase the torque transmission between the magnetorheological fluid 161 and the power input shaft 12, thereby improving the torque transmission reliability.
The specific structural shape of the key groove 12a is not limited. Specifically, in one embodiment, the key slot 12a extends in the axial direction of the power input shaft 12 to increase the effective active area of the magnetorheological fluid 161 with the power input shaft 12.
The number of the key grooves 12a is not limited, and may be one or more. It should be noted that the depth of the recessed key groove 12a into the surface of the power input shaft 12 and the length of the recessed key groove 12a extending in the axial direction of the power input shaft 12 need to be controlled within appropriate ranges to ensure the structural strength of the power input shaft 12.
In some embodiments, the surface of the portion of the power input shaft 12 located in the magnetorheological fluid 161 is a rough surface, that is, the surface has a rugged or hollow structure. The rough surface can increase the bonding force of the magnetorheological fluid 161 and the surface of the power input shaft 12, and improve the torque transmission reliability.
In one embodiment, referring to fig. 1, the power transmission device 1 includes a mounting bracket 17, and the mounting bracket 17 is connected to the second side of the bottom plate assembly 11. Specifically, the mounting bracket 17 has a substantially barrel shape, and the mounting bracket 17 has a receiving space 17a, the receiving space 17a being open toward one side of the floor assembly 11. The gear reduction mechanism 13 is disposed in the accommodating space 17a, and the mounting bracket 17 provides the accommodating space 17a for the gear reduction mechanism 13. The side wall of the accommodating space 17a may be a closed structure formed by a plate body, or may be a mesh structure formed by interlacing ribs, and the like, which is not limited herein.
The magnetorheological fluid clutch 16 is disposed on a side of the mounting bracket 17 facing away from the base plate assembly 11. Specifically, referring to fig. 2, an avoiding opening 17b is formed at an end of the mounting frame 17 away from the bottom plate assembly 11, and the power input shaft 12 passes through the magnetorheological fluid clutch 16 and then enters the accommodating space 17a from the bottom side of the mounting frame 17 through the avoiding opening 17 b.
In one embodiment, the positive magnetic pole 164 and the negative magnetic pole 165 are both fixedly attached to the mounting bracket 17.
In order to facilitate the magnetorheological fluid clutch 16 to transmit the torque to the dehydrating shaft 15, in an embodiment, referring to fig. 1, a second end of the dehydrating shaft 15 extends into the accommodating space 17a and is fixedly connected with a top end of the mounting shell 131, and a top end of the housing 162 extends into the accommodating space 17a and is fixedly connected with a bottom end of the mounting shell 131. That is, the spin-drying shaft 15 and the housing 162 of the magnetorheological fluid clutch 16 are fixedly coupled together by the mounting housing 131 of the gear reduction mechanism 13, so that the structure can be made more compact. When the magnetorheological fluid 161 changes from a liquid state to a solid state, the magnetorheological fluid 161 and the shell 162 form a rigid whole, the power input shaft 12 drives the magnetorheological fluid 161 and the shell 162 to synchronously rotate, and the shell 162 further drives the mounting shell 131 and the dewatering shaft 15 to synchronously rotate.
In one embodiment, referring to fig. 2, the mounting housing 131 is open toward the magnetorheological clutch 16, and the portion of the housing 162 extending into the accommodating space 17a is disposed at the open portion of the mounting housing 131 to support the gear set 132. That is, a partial structure of the housing 162 covers the opening of the mounting case 131, so that the partial structure of the housing 162 together with the mounting case 131 mounts the gear unit 132 in the accommodating space 17 a. On the one hand, the processing and manufacturing of the mounting shell 131 are facilitated, and on the other hand, part of the structure of the shell 162 can be supported on the mounting frame 17, so that the shell 162 is connected with the mounting frame 17 more reliably, and the shell 162 cannot be separated from the mounting frame 17.
In an embodiment, please continue to refer to fig. 2, the housing 162 includes a housing main body 1621 and a supporting plate 1622, a space in the housing main body 1621 is an accommodating cavity, two ends of the housing main body 1621 in the axial direction of the power input shaft 12 are formed with a contracting cylinder portion 16211, the supporting plate 1622 is disposed at the top end of the contracting cylinder portion 16211, the supporting plate 1622 is located in the accommodating space 17a, the contracting cylinder portion 16211 is disposed in the avoiding opening 17b, and the gear set 132 is supported on the supporting plate 1622.
In one embodiment, the magnetorheological clutch 16 includes a bearing assembly 163 disposed in the contracting cylinder 16211, the bearing assembly 163 includes a first bearing 1631 and a seal ring 1632, and the seal ring 1632 and the first bearing 1631 are both disposed on the power input shaft 12. In the present embodiment, the number of the bearing assemblies 163 is two, wherein one of the bearing assemblies 163 is disposed in one of the shrink cylinder portions 16211, and wherein the other of the bearing assemblies 163 is disposed in the other of the shrink cylinder portions 16211. The two first bearings 1631 support the power input shaft 12 to reduce the rotational resistance of the power input shaft 12.
The first bearing 1631 is pressed against one side of the sealing ring 1632 departing from the magnetorheological fluid, and the first bearing 1631 plays a role in stopping and supporting the sealing ring 1632, so that the structural strength of the sealing ring 1632 in the axial direction is enhanced.
The seal ring 1632 seals a gap between the power input shaft 12 and the inner wall of the contracting cylinder portion 16211. Specifically, the radially inner side of the seal ring 1632 is in sealing abutment with the power input shaft 12, and the radially outer side of the seal ring 1632 is in sealing abutment with the inner wall of the contracting cylinder portion 16211, so as to seal the magnetorheological fluid 161 in the liquid storage chamber.
Specifically, referring to fig. 2, in the embodiment of the present application, the inner wall of the contracting cylinder portion 16211 is provided with a first step surface 1621a and a second step surface 1621b which are axially spaced apart, the side of the sealing ring 1632 facing the magnetorheological fluid 161 abuts against the first step surface 1621a, the side of the first bearing facing the magnetorheological fluid 161 abuts against the second step surface 1621b, and the axial distance between the first step surface 1621a and the second step surface 1621b along the power input shaft 12 is smaller than the axial thickness of the sealing ring 1632, so that the sealing ring is pressed in the process of the first bearing abutting against the second step surface 1621b, and the sealing ring is elastically deformed in the radial direction, so that the radial inner side of the sealing ring is attached to the power input shaft 12, and the radial outer side of the sealing ring is attached to the inner wall of the contracting cylinder portion 16211.
In one embodiment, the power transmission device 1 includes a second bearing 181, and the second bearing 181 is sleeved on the contracting cylinder portion 16211 and is located between the contracting cylinder portion 16211 and the inner wall of the escape opening 17 b. When the magnetorheological fluid clutch 16 rotates along with the power input shaft 12, the second bearing 181 can reduce friction between the housing 162 and the mounting frame 17, and can also play a positioning and guiding role in rotation of the magnetorheological fluid clutch 16.
In one embodiment, referring to fig. 1, the power transmission device 1 includes a third bearing 182 disposed on the outer surface of the dewatering shaft 15, and the third bearing 182 is disposed between the dewatering shaft 15 and the bottom plate assembly 11. The second bearing 181 and the third bearing 182 are coaxially disposed to jointly perform positioning and guiding functions on the dehydrating shaft 15 and the magnetorheological fluid clutch 16.
It is understood that the housing 162 may be an integral structure, or may be a separate structure and fixedly connected together.
In the assembling process of the clothes processing equipment of the embodiment of the application, the power transmission device 1 can be assembled into a whole; referring to fig. 3, the pulley 21 is sleeved on the power input shaft 12, and the locking nut 23 is used to position the pulley 21 on the power input shaft 12; the motor and conveyor belt 22 is then installed.
The embodiment of the present application further provides a control method of any one of the above-mentioned clothes treatment apparatuses, including the steps of:
s1: and acquiring a dehydration instruction.
S2: and controlling the magnetorheological fluid clutch 16 to be electrified, so that the form of the magnetorheological fluid 161 in the magnetorheological fluid clutch 16 is changed from a liquid state to a solid state, and the magnetorheological fluid clutch 16 is in driving connection with the power input shaft 12 and the dewatering shaft 15 so as to drive the impeller and the inner cylinder to synchronously rotate.
S3: after the dehydration process is finished, the magnetorheological fluid clutch 16 is controlled to be powered off, so that the form of the magnetorheological fluid 161 in the magnetorheological fluid clutch 16 is changed from a solid state to a liquid state, and the magnetorheological fluid clutch 16 disconnects the power input shaft 12 and the dehydration shaft 15.
It should be noted that after the step S3 is finished, the laundry treating apparatus may enter the washing state again, or the program is finished and the laundry treating apparatus is turned off.
It should be noted that the dewatering instruction may be a dewatering mode embedded in the corresponding single dewatering mode or the washing mode, and this is not limited.
The various embodiments/implementations provided herein may be combined with each other without contradiction.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (11)
1. A power transmission device for a laundry treating apparatus, characterized by comprising:
a floor assembly (11), the floor assembly (11) comprising a first side for sealing a tub of the laundry treatment apparatus and a second side facing away from the tub;
a power input shaft (12);
a gear reduction mechanism (13), the gear reduction mechanism (13) being disposed on a second side of the floor assembly (11);
a pulsator shaft (14), a first end of the pulsator shaft (14) is used for being connected with a pulsator of a clothes treatment device, and a second end of the pulsator shaft (14) and the power input shaft (12) are in power transmission through the gear speed reducing mechanism (13);
a dehydrating shaft (15), wherein a first end of the dehydrating shaft (15) is used for being connected with an inner drum of the clothes processing equipment;
the magnetorheological fluid clutch (16), the magnetorheological fluid clutch (16) is arranged on the second side of the bottom plate component (11), magnetorheological fluid (161) is packaged in the magnetorheological fluid clutch (16), and the power input shaft (12) penetrates through the magnetorheological fluid (161); the second end of the dewatering shaft (15) and the power input shaft (12) are switched between driving connection and disconnection through the magnetorheological fluid clutch (16).
2. The power transmission device according to claim 1, wherein the dewatering shaft (15) is a hollow shaft, the dewatering shaft (15) is sleeved on the outer surface of the impeller shaft (14), and the impeller shaft (14) and the dewatering shaft (15) are coaxially arranged.
3. The power transmission device according to claim 1, characterized in that a surface of a portion of the impeller shaft (14) located in the magnetorheological fluid (161) is formed with at least one key groove (12 a); and/or the surface of the part of the impeller shaft (14) in the magnetorheological fluid (161) is a rough surface.
4. The power transmission device according to claim 1, characterized by comprising a mounting bracket (17), the mounting bracket (17) being attached to a second side of the floor assembly (11), the mounting bracket (17) having a receiving space (17a), the gear reduction mechanism (13) being disposed in the receiving space (17 a); the magnetorheological fluid clutch (16) is arranged on one side, departing from the bottom plate component (11), of the mounting frame (17).
5. The power transmission device according to claim 4, wherein the magnetorheological fluid clutch (16) comprises a housing (162) and at least one pair of a positive magnetic pole (164) and a negative magnetic pole (165), the magnetorheological fluid (161) is encapsulated in the housing (162), and the positive magnetic pole (164) and the negative magnetic pole (165) are arranged on two opposite sides outside the housing (162) and fixedly connected with the mounting frame (17); the gear reduction mechanism (13) comprises a mounting shell (131) and a gear set (132) arranged in the mounting shell (131); the second end of the dewatering shaft (15) extends into the accommodating space (17a) and is fixedly connected with the top end of the mounting shell (131), and the top end of the shell (162) extends into the accommodating space (17a) and is fixedly connected with the bottom end of the mounting shell (131).
6. The power transmission device according to claim 5, wherein the mounting case (131) is open at a side facing the magnetorheological clutch (16), and a portion of the structure of the housing (162) protruding into the accommodating space (17a) is provided at the open mounting case (131) to support the gear train (132).
7. The power transmission device according to claim 6, wherein the housing (162) includes a housing main body (1621) and a support plate (1622), the housing main body (1621) is formed with a shrink cylinder portion (16211) along both axial ends of the power input shaft (12), the support plate (1622) is provided on a top portion of one of the shrink cylinder portions (16211), the support plate (1622) is located in the accommodation space (17a) and supported on a bottom wall of the accommodation space (17a), and the gear train (132) is supported on the support plate (1622).
8. The power transmission device according to claim 7, wherein the magnetorheological fluid clutch (16) includes a bearing assembly (163) disposed in the contracting cylinder portion (16211), the bearing assembly (163) includes a seal ring (1632) and a first bearing (1631), the seal ring (1632) and the first bearing (1631) are both sleeved on the power input shaft (12), the first bearing (1631) is pressed against a side of the seal ring (1632) facing away from the magnetorheological fluid, and the seal ring (1632) seals a gap between the power input shaft (12) and an inner wall of the contracting cylinder portion (16211).
9. The power transmission device according to claim 6, wherein an avoidance port (17b) is provided at one end of the mounting bracket (17) away from the bottom plate assembly (11), one of the contracting cylinder portions (16211) is disposed through the avoidance port (17b), the power transmission device includes a first bearing (1631), and the first bearing (1631) is sleeved on the contracting cylinder portion (16211) and is clamped between the contracting cylinder portion (16211) and an inner wall of the avoidance port (17 b).
10. A laundry treating apparatus, comprising:
an impeller;
the impeller is rotatably arranged at the bottom of the inner cylinder;
the inner cylinder is rotatably arranged in the water containing barrel, and a mounting hole is formed in the bottom of the water containing barrel;
the power transmission device as claimed in any one of claims 1 to 9, wherein the pulsator shaft (14) and the dehydrating shaft (15) are extended into the tub through the mounting hole, the bottom plate assembly (11) seals the mounting hole, a first end of the pulsator shaft (14) is fixedly connected to the pulsator, and a first end of the dehydrating shaft (15) is fixedly connected to the inner tub;
the belt wheel (21), the said belt wheel (21) is fixedly connected to the said power input shaft (12);
the motor and the transmission belt are connected between the belt wheel (21) and the motor;
a control device electrically connected to the magnetorheological fluid clutch (16).
11. A control method of a laundry treating apparatus according to claim 10, comprising the steps of:
acquiring a dehydration instruction;
controlling the magnetorheological fluid clutch (16) to be electrified, wherein the magnetorheological fluid clutch (16) is used for driving and connecting the power input shaft (12) and the dehydration shaft (15) so as to drive the impeller and the inner cylinder to synchronously rotate;
and after the dehydration process is finished, controlling the magnetorheological fluid clutch (16) to be powered off, wherein the magnetorheological fluid clutch (16) disconnects the power input shaft (12) from the dehydration shaft (15).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010351193.0A CN113564875A (en) | 2020-04-28 | 2020-04-28 | Power transmission device, clothes treatment equipment and control method thereof |
| PCT/CN2020/109509 WO2021217956A1 (en) | 2020-04-28 | 2020-08-17 | Power transmission device, laundry treatment apparatus and control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010351193.0A CN113564875A (en) | 2020-04-28 | 2020-04-28 | Power transmission device, clothes treatment equipment and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113564875A true CN113564875A (en) | 2021-10-29 |
Family
ID=78158118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010351193.0A Pending CN113564875A (en) | 2020-04-28 | 2020-04-28 | Power transmission device, clothes treatment equipment and control method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113564875A (en) |
| WO (1) | WO2021217956A1 (en) |
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| WO2021217956A1 (en) | 2021-11-04 |
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