Clothes airing machine lifting device, clothes airing machine and control method of clothes airing machine

Abstract

The invention discloses a clothes airing machine lifting device, a clothes airing machine and a control method of the clothes airing machine, and belongs to the technical field of clothes airing machines, the clothes airing machine lifting device comprises a power mechanism, a protection assembly and a winding assembly, the power mechanism comprises a motor and transmission assemblies, the motor is provided with two motor shafts, and one transmission assembly is arranged corresponding to each motor shaft; the transmission assembly comprises an input shaft and an output shaft which are in transmission connection; a protection assembly is arranged between the motor shaft and the input shaft in a transmission mode, and when the input shaft stops rotating and the corresponding motor shaft rotates, the motor shaft overcomes resistance of the protection assembly and is separated from the input shaft in a transmission mode so that the motor shaft can idle. The wire winding assembly comprises wire winding wheels and a steel wire rope, each output shaft is provided with one wire winding wheel, and the steel wire rope is wound around the wire winding wheels. The clothes airing machine comprises a clothes airing rod and the clothes airing machine lifting device. The control method of the clothes airing machine is applied to the clothes airing machine, the motor is controlled to stop rotating through current pulse and / or current magnitude, and it is guaranteed that a clothes airing rod is stored flatly.

Description

Technical Field

[0001] The present invention relates to the technical field of clothes dryers, and in particular to a lifting device for a clothes dryer, a clothes dryer and a control method thereof. Background Art

[0002] With the rapid development of clothes dryers, electric clothes dryers have gradually become common household appliances. The existing electric clothes dryers mainly include a main body and a clothes drying rod arranged below the main body. The lifting device on the clothes dryer can drive the clothes drying rod to lift relative to the main body. When the clothes drying rod descends relative to the main body to the clothes hanging position, it is convenient for users to pick up and place clothes on the clothes drying rod; when the clothes drying rod rises from the clothes hanging position to the drying position, clothes drying is realized; when the clothes dryer is not in use, the clothes drying rod is usually raised to the storage position.

[0003] To ensure the beauty of the electric clothes dryer, when the clothes drying rod rises to the storage position, it is usually located inside the housing of the main body so that the clothes drying rod is not exposed. As Figure 1 shown, the electric clothes dryer drives a transmission component to drive a wire winding wheel 41 to rotate through a motor 10. The motor 10 has two motor shafts 11, which drive two wire winding wheels 41 to rotate. Two steel wire ropes 42 are connected to both ends of the clothes drying rod. By winding and unwinding the steel wire ropes 42 on the wire winding wheel 41, the clothes drying rod is lifted and lowered by means of the tension of the steel wire ropes 42.

[0004] In the existing clothes dryers, a contact switch is usually arranged at the storage position. When the clothes drying rod rises to trigger the contact switch, it is considered that the storage is in place, and the motor 10 is controlled to stop rotating. Since the two steel wire ropes 42 are very long and there are tolerances in the length direction, and the diameters of the two wire winding wheels 41 are slightly different; or after using for a period of time, the steel wire ropes 42 are stretched and the wire winding wheels 41 are worn. After one end of the clothes drying rod is retracted into the housing of the main body, the motor 10 stops rotating, while the other end of the clothes drying rod is still outside the housing, resulting in uneven storage of the clothes drying rod. Summary of the Invention

[0005] The purpose of the present invention is to provide a lifting device for a clothes dryer, a clothes dryer and a control method thereof, so as to solve the technical problem of uneven storage of the clothes drying rod existing in the prior art.

[0006] As conceived above, the technical solution adopted by the present invention is as follows:

[0007] A lifting device for a clothes dryer, comprising:

[0008] A power mechanism, including a motor and a transmission component. The motor has two motor shafts, and a set of the transmission components is arranged corresponding to each motor shaft. The transmission component includes an input shaft and an output shaft, and the input shaft and the output shaft are in transmission connection;

[0009] At least one set of protection components, which are transmission - arranged between the motor shaft and the input shaft. When the input shaft stops rotating and the corresponding motor shaft rotates, the motor shaft overcomes the resistance of the protection components and disengages from the input shaft for transmission, so that the motor shaft rotates idly.

[0010] Two sets of wire - winding components, the wire - winding component includes a wire - winding wheel and a steel wire rope. One wire - winding wheel is arranged on each output shaft, and the steel wire rope is wound around the wire - winding wheel.

[0011] Wherein, the protection component includes a sliding sleeve and an elastic member. One of the motor shaft and the input shaft is in fit with the sliding sleeve through a limiting groove and a limiting protrusion, and the elastic member is arranged between the other one and the sliding sleeve. The sliding sleeve can slide along the axial direction of the motor shaft, the limiting protrusion can slide into or out of the limiting groove, and the resistance overcome by the motor shaft is the resistance generated when the limiting protrusion disengages from the limiting groove and drives the sliding sleeve to slide and compress the elastic member.

[0012] Wherein, the motor shaft is in fit with the sliding sleeve through the limiting groove and the limiting protrusion, and the elastic member is arranged between the input shaft and the sliding sleeve.

[0013] Wherein, one end of the sliding sleeve is sleeved on the motor shaft, the limiting groove is arranged at the end of the sliding sleeve, and the limiting protrusion is arranged on the motor shaft.

[0014] Wherein, one of the sliding sleeve and the input shaft is provided with a guiding groove, and the other one is provided with a guiding protrusion. The guiding groove extends parallel to the axial direction of the sliding sleeve, and the guiding protrusion penetrates through the guiding groove and can slide along the guiding groove.

[0015] Wherein, the limiting groove includes a limiting section and a guiding section. There are two guiding sections and they are distributed on both sides of the limiting section. The limiting section is used to limit the limiting protrusion, and the guiding section is used to guide the limiting protrusion to slide into or out of the limiting groove.

[0016] Wherein, the transmission component further includes a first transmission shaft. The input shaft is a worm, a worm gear is arranged on the first transmission shaft, the worm is meshed with the worm gear, and the first transmission shaft is in transmission connection with the output shaft.

[0017] A clothes dryer, including a main body and a clothes drying rod. The clothes dryer further includes the clothes dryer lifting device as described above. The power mechanism is arranged on the main body, and the steel wire rope is connected with the clothes drying rod.

[0018] A control method for a clothes dryer, which is applied to the clothes dryer as described above, includes:

[0019] When the clothes dryer receives a storage instruction, the motor shaft drives the input shaft to rotate, driving the output shaft to rotate. The wire reel on the output shaft rotates with the output shaft, and the wire reel winds up the steel wire rope.

[0020] The current of the motor is detected in real time by the detection component, and the motor is controlled to stop rotating according to the current pulse and / or the current magnitude.

[0021] Among them, controlling the motor to stop rotating according to the current pulse and / or the current magnitude includes:

[0022] When a set of the protection components is provided, if at least one current pulse is detected and the current is greater than the first limit value Tmax, the motor is controlled to stop rotating;

[0023] When two sets of the protection components are provided, a set of the protection components is arranged between each motor shaft and the input shaft; if the time interval between at least two detected current pulses is less than the first set value T0, the motor is controlled to stop rotating.

[0024] Advantages of the present invention:

[0025] For the lifting device of the clothes dryer proposed by the present invention, when the wire reel winds up the steel wire rope, the two motor shafts rotate, driving the two input shafts to rotate, and then driving the two output shafts to rotate. The wire reels on the output shafts rotate with the output shafts to realize winding up the steel wire ropes, and the two steel wire ropes are wound up simultaneously; when the steel wire rope at one end provided with the protection component is stored in place while the steel wire rope at the other end is not stored in place, the wire reel that is stored in place stops rotating, resulting in the stop of the input shaft and the output shaft on the same side, while the corresponding motor shaft is still rotating. At this time, the motor shaft overcomes the resistance of the protection component and disengages from the input shaft to drive the motor shaft to rotate idly, so the motor shaft at the end that is stored in place rotates idly; while the wire reel at the end that is not stored in place continues to rotate driven by the motor shaft, driving the steel wire rope to continue to wind up until it is stored in place; through the setting of the protection component, both steel wire ropes can be stored in place.

[0026] For the clothes dryer proposed by the present invention, adopting the above-mentioned lifting device of the clothes dryer, when the end of the clothes drying rod provided with the protection component is stored in place while the other end is not stored in place, the wire reel that is stored in place stops rotating, resulting in the stop of the input shaft and the output shaft on the same side, while the corresponding motor shaft is still rotating. At this time, the motor shaft overcomes the resistance of the protection component and disengages from the input shaft to drive the motor shaft to rotate idly, so the motor shaft at the end that is stored in place rotates idly; while the wire reel at the end that is not stored in place continues to rotate driven by the motor shaft, driving the steel wire rope to continue to wind up until it is stored in place; through the setting of the protection component, both ends of the clothes drying rod can be stored in place, ensuring that the clothes drying rod is stored flat.

[0027] The control method of the clothes drying machine proposed by the present invention is as follows: when the clothes drying rod is being stored, when the end of the clothes drying rod provided with the protection component is stored in place, the winding wheel that has been stored in place stops rotating, causing the input shaft and the output shaft on the same side to stop rotating, while the corresponding motor shaft is still rotating. At this time, the motor shaft overcomes the resistance of the protection component and disengages from the input shaft. During the process of the motor shaft overcoming the resistance of the protection component, the current of the motor will suddenly increase. After the motor shaft overcomes the resistance of the protection component, the current of the motor will suddenly decrease again. Therefore, a current pulse is formed, and the motor shaft at the end that has been stored in place idles. When the end of the clothes drying rod without the protection component is stored in place, the winding wheel that has been stored in place stops rotating, causing the input shaft and the output shaft on the same side to stop rotating, while the corresponding motor shaft is blocked, resulting in a rapid increase in the current of the motor. Therefore, through the setting of the protection component, it is possible to determine whether both steel wire ropes have been stored in place according to the current pulse and / or the current magnitude, and then the motor can be controlled to stop rotating. By judging the timing of the motor stop rotating through the current pulse and / or the current magnitude, it is ensured that both ends of the clothes drying rod are stored in place, ensuring that the clothes drying rod is stored flatly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a partial structural schematic diagram of a conventional lifting device of a clothes drying machine;

[0029] Figure 2 is a partial structural schematic diagram of a lifting device of a clothes drying machine provided in Embodiment 1 of the present invention Figure 1 ;

[0030] Figure 3 is a partial structural schematic diagram of a lifting device of a clothes drying machine provided in Embodiment 1 of the present invention Figure 2 ;

[0031] Figure 4 is a structural schematic diagram of a sliding sleeve provided in Embodiment 1 of the present invention;

[0032] Figure 5 is a structural schematic diagram of another sliding sleeve provided in Embodiment 1 of the present invention;

[0033] Figure 6 is a partial structural schematic diagram of a lifting device of a clothes drying machine provided in Embodiment 2 of the present invention;

[0034] Figure 7 is a structural schematic diagram of a sliding sleeve provided in Embodiment 2 of the present invention;

[0035] Figure 8 is a partial structural schematic diagram of a lifting device of a clothes drying machine provided in Embodiment 3 of the present invention;

[0036] Figure 9 is a partial structural schematic diagram of a lifting device of a clothes drying machine provided in Embodiment 4 of the present invention Figure 1 ;

[0037] Figure 10 It is a partial structural schematic diagram of the lifting device of the clothes dryer provided in the fourth embodiment of the present invention Figure 2 ;

[0038] Figure 11 It is a partial structural schematic diagram of the lifting device of the clothes dryer provided in the fifth embodiment of the present invention;

[0039] Figure 12 It is the first current waveform diagram of the control method of the clothes dryer provided in the sixth embodiment of the present invention;

[0040] Figure 13 It is the second current waveform diagram of the control method of the clothes dryer provided in the sixth embodiment of the present invention;

[0041] Figure 14 It is the third current waveform diagram of the control method of the clothes dryer provided in the sixth embodiment of the present invention;

[0042] Figure 15 It is the fourth current waveform diagram of the control method of the clothes dryer provided in the sixth embodiment of the present invention.

[0043] In the figure:

[0044] 10. Motor; 11. Motor shaft;

[0045] 21. Input shaft; 211. Limiting part; 22. Worm gear; 23. First gear; 24. Second gear;

[0046] 30. Protection component; 31. Sliding sleeve; 32. Elastic member; 33. Limiting groove; 331. Limiting section; 332. Guide section; 34. Limiting protrusion; 35. Guide groove; 36. Guide protrusion;

[0047] 40. Wire winding component; 41. Wire winding wheel; 42. Steel wire rope. Detailed implementation manners

[0048] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0049] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0051] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0052] Embodiment 1

[0053] Refer to Figures 2 to 4 and in combination with Figure 1 , an embodiment of the present invention provides a lifting device for a clothes dryer, which includes a power mechanism, at least one set of protection components 30, and two sets of wire winding components 40. The power mechanism includes a motor 10 and a transmission component. The motor 10 has two motor shafts 11, and a set of transmission components is provided corresponding to each motor shaft 11. The transmission component includes an input shaft 21 and an output shaft, and the input shaft 21 and the output shaft are in transmission connection; the protection component 30 is disposed in transmission between the motor shaft 11 and the input shaft 21. When the input shaft 21 stops rotating and the corresponding motor shaft 11 rotates, the motor shaft 11 overcomes the resistance of the protection component 30 and disengages from the input shaft 21 in transmission so that the motor shaft 11 rotates idly; the wire winding component 40 includes a wire winding wheel 41 and a steel wire rope 42. A wire winding wheel 41 is provided on each output shaft, and the steel wire rope 42 is wound around the wire winding wheel 41.

[0054] When the wire reel 41 winds up the wire rope 42, the two motor shafts 11 rotate to drive the two input shafts 21 to rotate, and then drive the two output shafts to rotate. The wire reel 41 on the output shaft rotates with the output shaft to wind up the wire rope 42, and the two wire ropes 42 are wound up simultaneously; when the wire rope 42 at one end where the protection component 30 is provided is wound up in place while the wire rope 42 at the other end is not wound up in place, the wire reel 41 that is wound up in place stops rotating, resulting in the stop of the input shaft 21 and the output shaft on the same side, while the corresponding motor shaft 11 is still rotating. At this time, the motor shaft 11 overcomes the resistance of the protection component 30 and disengages from the input shaft 21 to make the motor shaft 11 idle, so the motor shaft 11 at the end that is wound up in place idles; while the wire reel 41 at the end that is not wound up in place continues to rotate under the drive of the motor shaft 11, driving the wire rope 42 to continue to wind up until it is wound up in place; through the setting of the protection component 30, the two wire ropes 42 can both be wound up in place.

[0055] In some cases, the two wire ropes 42 are wound up in place at the same time; in some cases, the two wire ropes 42 are wound up in place successively. In short, the two wire ropes 42 can both be wound up in place.

[0056] In the conventional setting, the motor shaft 11 and the input shaft 21 are coaxially arranged with a gap, and the motor shaft 11 and the input shaft 21 are connected by a coupling. In the case of setting the protection component 30, the motor shaft 11 and the input shaft 21 are coaxially arranged with a gap. By setting the protection component 30, the motor shaft 11 and the input shaft 21 can either drive each other or disengage from each other. When the motor shaft 11 and the input shaft 21 drive each other, the motor shaft 11 drives the input shaft 21 to rotate. When the motor shaft 11 and the input shaft 21 disengage from each other, the motor shaft 11 idles.

[0057] In some embodiments, one set of protection components 30 is provided. A protection component 30 is provided between one motor shaft 11 and the input shaft 21, and the other motor shaft 11 and the input shaft 21 are connected by a coupling. In this embodiment, two sets of protection components 30 are provided, and one set of protection components 30 is provided between each motor shaft 11 and the input shaft 21.

[0058] The transmission component further includes a first transmission shaft. The input shaft 21 is a worm, a worm wheel 22 is provided on the first transmission shaft, the worm meshes with the worm wheel 22, and the first transmission shaft is in transmission connection with the output shaft. The meshing of the worm and the worm wheel 22 can play a self-locking role to ensure the stability of the wire reel 41. Even if the motor shaft 11 idles, the wire reel 41 will not rotate back under the pulling force of the wire rope 42.

[0059] The first transmission shaft and the output shaft can be drivingly connected through a gear assembly. The gear assembly can include two gears or three gears. In some embodiments, the transmission assembly further includes a second transmission shaft. A first gear 23 is provided on the first transmission shaft, a second gear 24 is provided on the second transmission shaft, and an output gear is provided on the output shaft. The first gear 23 meshes with the second gear 24, and the second gear 24 meshes with the output gear. The wire reel 41 and the output gear can be integrally formed.

[0060] The protection assembly 30 includes a sliding sleeve 31 and an elastic member 32. One of the motor shaft 11 and the input shaft 21 is in cooperation with the sliding sleeve 31 through a limiting groove 33 and a limiting protrusion 34, and an elastic member 32 is provided between the other of them and the sliding sleeve 31. The sliding sleeve 31 can slide axially along the motor shaft 11, and the limiting protrusion 34 can slide into or out of the limiting groove 33. The resistance overcome by the motor shaft 11 is the resistance generated when the limiting protrusion 34 drives the sliding sleeve 31 to slide and compress the elastic member 32 when the limiting protrusion 34 disengages from the limiting groove 33.

[0061] When the wire reel 41 winds up the steel wire rope 42, when the steel wire rope 42 is not properly stored, the limiting protrusion 34 is located in the limiting groove 33. The motor shaft 11 rotates, driving the input shaft 21 to rotate, and then driving the output shaft to rotate. The wire reel 41 on the output shaft rotates with the output shaft to realize winding up the steel wire rope 42. When the steel wire rope 42 at the end where the protection assembly 30 is provided is properly stored, the wire reel 41 that is properly stored stops rotating, resulting in the input shaft 21 and the output shaft on the same side stopping rotating, while the corresponding motor shaft 11 is still rotating. At this time, the torque generated by the rotation of the motor shaft 11 will drive the limiting protrusion 34 to disengage from the limiting groove 33. When the limiting protrusion 34 disengages from the limiting groove 33, it drives the sliding sleeve 31 to slide, thereby compressing the elastic member 32. The resistance overcome by the motor shaft 11 is the resistance generated when the limiting protrusion 34 drives the sliding sleeve 31 to slide and compress the elastic member 32 when the limiting protrusion 34 disengages from the limiting groove 33, so that the motor shaft 11 is disengaged from the input shaft 21 and the motor shaft 11 idles.

[0062] The sliding sleeve 31 can slide axially along the motor shaft 11, so the deformation direction of the elastic member 32 is parallel to the axial direction of the motor shaft 11. The limiting protrusion 34 can slide into or out of the limiting groove 33. When the limiting protrusion 34 slides out of the limiting groove 33, the extrusion of the limiting protrusion 34 on the limiting groove 33 drives the sliding sleeve 31 to slide, so the limiting groove 33 extends parallel to the axial direction of the motor shaft 11.

[0063] In this embodiment, a set of limiting grooves 33 and limiting protrusions 34 are provided. When the motor shaft 11 idles, the motor shaft 11 needs to overcome the resistance generated when the limiting protrusion 34 drives the sliding sleeve 31 to slide and compress the elastic member 32 when the limiting protrusion 34 disengages from the limiting groove 33 every 360 degrees of rotation.

[0064] The limiting groove 33 includes a limiting section 331 and a guiding section 332. There are two guiding sections 332 which are distributed on both sides of the limiting section 331. The limiting section 331 is used to limit the limiting protrusion 34, and the guiding section 332 is used to guide the limiting protrusion 34 to slide into or out of the limiting groove 33. When the motor shaft 11 drives the input shaft 21 to rotate, the limiting protrusion 34 is located in the limiting section 331 of the limiting groove 33, and the limiting section 331 plays a limiting role on the limiting protrusion 34. When the input shaft 21 stops rotating while the corresponding motor shaft 11 is still rotating, the torque generated by the rotation of the motor shaft 11 will drive the limiting protrusion 34 to slide relative to the limiting groove 33, and the limiting protrusion 34 will separate from the limiting groove 33 along the guiding section 332, so that the limiting protrusion 34 disengages from the limiting groove 33.

[0065] In order to facilitate the relative sliding between the limiting protrusion 34 and the limiting groove 33, the limiting protrusion 34 is a cylindrical protrusion. Correspondingly, the limiting section 331 is an arc section with a radian not exceeding 90 degrees. In order to ensure the smooth sliding of the limiting protrusion 34, the guiding section 332 is an arc section.

[0066] In this embodiment, the motor shaft 11 and the sliding sleeve 31 are matched through the limiting groove 33 and the limiting protrusion 34, and an elastic member 32 is arranged between the input shaft 21 and the sliding sleeve 31. It can be that the limiting groove 33 is arranged on the motor shaft 11 and the limiting protrusion 34 is arranged on the sliding sleeve 31; or it can be that the limiting protrusion 34 is arranged on the motor shaft 11 and the limiting groove 33 is arranged on the sliding sleeve 31. When the limiting groove 33 is arranged on the motor shaft 11, a limiting ring can be arranged on the motor shaft 11 and the limiting groove 33 is opened on the limiting ring.

[0067] The sliding sleeve 31 can be sleeved on the motor shaft 11 or can penetrate through the motor shaft 11. In this embodiment, one end of the sliding sleeve 31 is sleeved on the motor shaft 11, a limiting groove 33 is arranged at the end of the sliding sleeve 31, and a limiting protrusion 34 is arranged on the motor shaft 11. The limiting section 331 is located in the middle of the limiting groove 33, one end of the guiding section 332 is connected to the limiting section 331, and the other end of the guiding section 332 extends to the end face of the sliding sleeve 31.

[0068] The sliding sleeve 31 can be sleeved on the input shaft 21 or can penetrate through the input shaft 21. In this embodiment, the sliding sleeve 31 is sleeved on the input shaft 21, and the elastic member 32 is clamped between the sliding sleeve 31 and the input shaft 21. Specifically, a limiting portion 211 is arranged on the input shaft 21, one end of the elastic member 32 abuts against the limiting portion 211, and the other end of the elastic member 32 abuts against the sliding sleeve 31. The elastic member 32 can be sleeved on the input shaft 21 so that the input shaft 21 plays a guiding role on the elastic member 32. The elastic member 32 can be a spring.

[0069] To ensure the smooth sliding of the sliding sleeve 31, one of the sliding sleeve 31 and the input shaft 21 is provided with a guiding groove 35, and the other is provided with a guiding protrusion 36. The guiding groove 35 extends parallel to the axial direction of the sliding sleeve 31, and the guiding protrusion 36 is inserted into the guiding groove 35 and can slide along the guiding groove 35. The cooperation of the guiding groove 35 and the guiding protrusion 36 not only plays a guiding role but also can limit the circumferential sliding of the sliding sleeve 31 to ensure the smooth sliding of the sliding sleeve 31.

[0070] In this embodiment, the guiding groove 35 is provided on the sliding sleeve 31, and the guiding protrusion 36 is provided on the input shaft 21. The guiding protrusion 36 is inserted into the guiding groove 35 and can slide along the guiding groove 35. It can be as Figure 4 shown, one guiding groove 35 is provided on the sliding sleeve 31, and then one guiding protrusion 36 is provided on the corresponding input shaft 21. It can also be as Figure 5 shown, two or more guiding grooves 35 are provided on the sliding sleeve 31, for example, four. Each guiding groove 35 is evenly spaced circumferentially around the sliding sleeve 31, and then the corresponding guiding protrusions 36 are provided on the input shaft 21 that correspond one by one to the guiding grooves 35.

[0071] Embodiment Two

[0072] Figure 6 and Figure 7 shows Embodiment Two, in which the same or corresponding components as those in Embodiment One are labeled with the corresponding reference numerals in Embodiment One. For simplicity, only the differences between Embodiment Two and Embodiment One are described. The difference lies in that at least two groups of limiting grooves 33 and limiting protrusions 34 are provided and are evenly spaced circumferentially around the sliding sleeve 31 to ensure the smooth movement of the sliding sleeve 31. It can be that at least two limiting grooves 33 are provided at the end of the sliding sleeve 31, and each limiting groove 33 is evenly spaced circumferentially around the sliding sleeve 31, and the limiting protrusions 34 corresponding one by one to the limiting grooves 33 are provided on the motor shaft 11. It can also be that at least two limiting grooves 33 are provided on the motor shaft 11, and each limiting groove 33 is evenly spaced circumferentially around the motor shaft 11, and the limiting protrusions 34 corresponding one by one to the limiting grooves 33 are provided on the sliding sleeve 31.

[0073] When two groups of limiting grooves 33 and limiting protrusions 34 are provided, when the motor shaft 11 idles, the motor shaft 11 needs to overcome the resistance generated by driving the sliding sleeve 31 to slide and compress the elastic member 32 when the limiting protrusion 34 disengages from the limiting groove 33 every 180 degrees of rotation. When three groups of limiting grooves 33 and limiting protrusions 34 are provided, when the motor shaft 11 idles, the motor shaft 11 needs to overcome the resistance generated by driving the sliding sleeve 31 to slide and compress the elastic member 32 when the limiting protrusion 34 disengages from the limiting groove 33 every 120 degrees of rotation.

[0074] Embodiment Three

[0075] Figure 8 Embodiment III is shown, in which the components identical or corresponding to those in Embodiment I are denoted by the corresponding reference numerals in Embodiment I. For simplicity, only the differences between Embodiment III and Embodiment I are described. The difference lies in that the input shaft 21 and the sliding sleeve 31 are engaged through a limiting groove 33 and a limiting projection 34, and an elastic member 32 is provided between the motor shaft 11 and the sliding sleeve 31. It can be that the limiting groove 33 is provided on the input shaft 21 and the limiting projection 34 is provided on the sliding sleeve 31; or it can be that the limiting projection 34 is provided on the input shaft 21 and the limiting groove 33 is provided on the sliding sleeve 31. When the limiting groove 33 is provided on the input shaft 21, a limiting ring can be provided on the input shaft 21 and the limiting groove 33 can be formed on the limiting ring.

[0076] Embodiment IV

[0077] Figure 9 and Figure 10 Embodiment IV is shown, in which the components identical or corresponding to those in Embodiment I are denoted by the corresponding reference numerals in Embodiment I. For simplicity, only the differences between Embodiment IV and Embodiment I are described. The difference lies in that the elastic member 32 is disposed in the guiding groove 35, one end of the elastic member 32 abuts against the guiding projection 36, and the other end of the elastic member 32 abuts against the inner wall of the guiding groove 35. When the limiting projection 34 disengages from the limiting groove 33, the sliding sleeve 31 is driven to slide, so that the guiding projection 36 and the guiding groove 35 slide relative to each other, and the elastic member 32 is compressed. The elastic member 32 can be a rubber pad.

[0078] Embodiment V

[0079] Figure 11 Embodiment V is shown, in which the components identical or corresponding to those in Embodiment I are denoted by the corresponding reference numerals in Embodiment I. For simplicity, only the differences between Embodiment V and Embodiment I are described. The difference lies in that the protection assembly 30 includes a sliding sleeve 31, one of the motor shaft 11 and the input shaft 21 is engaged with the sliding sleeve 31 through a limiting groove 33 and a limiting projection 34, the other one abuts against the sliding sleeve 31, the sliding sleeve 31 itself has elasticity, the limiting projection 34 can slide into or out of the limiting groove 33, and the resistance overcome by the motor shaft 11 is the resistance generated by the deformation of the sliding sleeve 31 when the limiting projection 34 disengages from the limiting groove 33.

[0080] Specifically, the sliding sleeve 31 is sleeved on the input shaft 21, a limiting groove 33 is provided at one end of the sliding sleeve 31, a limiting portion 211 is provided on the input shaft 21, and the other end of the sliding sleeve 31 abuts against the limiting portion 211.

[0081] A guiding groove 35 is provided on the sliding sleeve 31, a guiding projection 36 is provided on the input shaft 21, and the guiding projection 36 passes through the guiding groove 35 and can slide along the guiding groove 35.

[0082] The technical solutions in any of the above embodiments can be freely combined without conflict.

[0083] Embodiment Six

[0084] This embodiment provides a clothes dryer, including a main body and a clothes drying rod. The clothes dryer further includes the clothes dryer lifting device in any of the above embodiments. The power mechanism is arranged on the main body, and a steel wire rope 42 is connected to the clothes drying rod.

[0085] When storing the clothes drying rod, when one end of the clothes drying rod provided with the protection component is stored in place while the other end is not, the winding wheel 41 that is stored in place stops rotating, resulting in the input shaft 21 and the output shaft on the same side stopping rotating, while the corresponding motor shaft 11 is still rotating. At this time, the motor shaft 11 overcomes the resistance of the protection component 30 and disengages from the input shaft 21 to make the motor shaft 11 idle, so the motor shaft 11 at the end that is stored in place idles; while the winding wheel 41 at the end that is not stored in place continues to rotate under the drive of the motor shaft 11, driving the steel wire rope 42 to continue to wind until it is stored in place; through the setting of the protection component 30, both ends of the clothes drying rod can be stored in place, ensuring that the clothes drying rod is stored flat.

[0086] See Figures 12 to 15 , this embodiment also provides a control method for a clothes dryer, which is applied to the above clothes dryer. The control method of the clothes dryer includes:

[0087] When the clothes dryer receives a storage instruction, the motor shaft 11 drives the input shaft 21 to rotate, driving the output shaft to rotate. The winding wheel 41 on the output shaft rotates along with the output shaft, and the winding wheel 41 winds the steel wire rope 42.

[0088] The current of the motor 10 is detected in real time through the detection component, and the motor 10 is controlled to stop rotating according to the current pulse and / or the current magnitude.

[0089] Specifically, the detection component can judge the generation time of the current pulse through the magnitude of the current value of the current or the waveform diagram of the current. In this embodiment, the clothes dryer further includes a controller. The current information obtained by the detection component is transmitted to the controller. When the controller judges that both ends of the clothes drying rod are stored in place, the controller controls the motor 10 to stop rotating. The controller is used to control all the above-mentioned electrical appliances, including but not limited to the motor 10, the detection component, the display screen, the computer input device, etc. The controller is an Intel processor, an AMD processor, a PLC controller, an ARM processor or a single-chip microcomputer. The accessories used in conjunction with it also include a main board, a memory module, a storage medium and a power supply. The power supply is mains power or a lithium battery. When there is a display screen, there is also a display card. Other automation controls and electrical appliances not mentioned are all well-known knowledge to those skilled in the art and will not be elaborated here.

[0090] Combined with Figures 2 to 11In the clothes dryer, when the end of the clothes drying rod with the protection component 30 is properly stored, the winding wheel 41 that is properly stored stops rotating, causing the input shaft 21 and the output shaft on the same side to stop rotating, while the corresponding motor shaft 11 is still rotating. At this time, the motor shaft 11 overcomes the resistance of the protection component 30 and disengages from the input shaft 21. During the process of the motor shaft 11 overcoming the resistance of the protection component 30, the current of the motor 10 will suddenly increase. After the motor shaft 11 overcomes the resistance of the protection component 30, the current of the motor 10 suddenly decreases again, thus forming a current pulse, and the motor shaft 11 at the properly stored end idles.

[0091] When the end of the clothes drying rod without the protection component 30 is properly stored, the winding wheel 41 that is properly stored stops rotating, causing the input shaft 21 and the output shaft on the same side to stop rotating, while the corresponding motor shaft 11 is blocked, resulting in a rapid increase in the current of the motor 10.

[0092] Therefore, through the setting of the protection component 30, it can be determined whether both motor shafts 11 are properly stored according to the current pulse and / or the current magnitude, and then the motor 10 can be controlled to stop rotating. The timing of the motor 10 stopping rotating is judged by the current pulse and / or the current magnitude to ensure that both ends of the clothes drying rod are properly stored and the clothes drying rod is stored flat.

[0093] As described above, when the end with the protection component 30 is properly stored, a current pulse is formed and the motor shaft 11 idles. When the end without the protection component 30 is properly stored, the current of the motor 10 increases rapidly. Therefore, when a set of protection components 30 is provided, if at least one current pulse is detected and the current is greater than the first limit value Tmax, the motor 10 is controlled to stop rotating.

[0094] For the convenience of detection, structurally, it can be set that the steel wire rope 42 at the end with the protection component 30 is shorter than the steel wire rope 42 at the end without the protection component 30. Therefore, during storage, the end with the protection component 30 is stored properly first, and the end without the protection component 30 is stored properly later. Therefore, it can be ensured that the current pulse is detected first and then the current rapidly increases to be greater than the first limit value Tmax. This setting is for the convenience of detecting the current pulse to ensure that the motor shaft 11 at the end with the protection component 30 idles.

[0095] When two sets of protection components 30 are provided, when one end of the clothes drying rod is retracted in place while the other end is not, the motor shaft 11 at the end retracted in place overcomes the resistance of the protection component 30, resulting in a current pulse; while the wire reel 41 at the end not retracted in place continues to rotate driven by the motor shaft 11, driving the steel wire rope 42 to continue to wind until it is retracted in place, and then the corresponding motor shaft 11 also overcomes the resistance of the protection component 30, resulting in a current pulse. The two motor shafts 11 overcome the resistance of the protection component 30 successively, so the generated current pulses are different.

[0096] Therefore, when two sets of protection components 30 are provided, if it is detected that the time interval between at least two current pulses is less than the first set value T0, the motor 10 is controlled to stop rotating.

[0097] As Figure 12 shown, when only one motor shaft 11 rotates idly, in the generated current waveform diagram, the current pulses are uniform, the time interval between adjacent current pulses is basically a fixed value, and the amplitudes of each current pulse are basically the same. Among them, the abscissa of the current waveform diagram is time t, with the unit of s, and the ordinate is current I, with the unit of A.

[0098] Under normal circumstances, the time interval between the two ends of the clothes drying rod being retracted in place is not very long. Therefore, the time interval between the two motor shafts 11 overcoming the resistance of the protection component 30 successively is very short. When both motor shafts 11 rotate idly, the generated current waveform diagram, as Figure 13 shown, there is a time interval between the two current pulses. If when only one motor shaft 11 rotates idly, the time interval between adjacent current pulses is T0, and if it is detected that the time interval between at least two current pulses is less than the first set value T0, it can be determined that both motor shafts 11 rotate idly, so it can be determined that both ends of the clothes drying rod are retracted in place.

[0099] As Figure 14As shown, in some cases, when both ends of the clothes drying rod are retracted in place at the same time, the two motor shafts 11 overcome the resistance of the protection component 30 at the same time, and the two motor shafts 11 rotate idly at the same time. In the generated current waveform diagram, the current pulses are uniform, the time interval between adjacent current pulses is basically a fixed value, and the amplitudes of each current pulse are basically the same. Compared with only one motor shaft 11 rotating idly, the two motor shafts 11 rotating idly at the same time result in an increase in the amplitude of the current pulse. Therefore, when the wire reel 41 winds up the steel wire rope 42, if the time interval between any two adjacent current pulses among the multiple current pulses detected within the first set time period is equal to the first set value T0, then compare the amplitudes of each current pulse. If the amplitude of at least one current pulse is greater than the first set amplitude, then control the motor 10 to stop rotating. It can be understood that the first set amplitude is greater than the amplitude of the current pulse generated when only one motor shaft 11 rotates idly, and the first set amplitude is less than the amplitude of the current pulse generated when the two motor shafts 11 rotate idly at the same time.

[0100] As Figure 15 As shown, in some cases, when one end of the clothes drying rod is retracted in place while the other end is not, the two motor shafts 11 overcome the resistance of the protection component 30 successively. However, the moment when the subsequent motor shaft 11 rotates idly coincides with the moment when a certain current pulse is generated by the previous motor shaft 11 rotating idly, resulting in the time interval between each current pulse being the first set value T0. Therefore, when the wire reel 41 winds up the steel wire rope 42, if the time interval between any two adjacent current pulses among the multiple current pulses detected within the first set time period is equal to the first set value T0, then compare the amplitudes of each current pulse. If the amplitude of at least one current pulse is greater than the first set amplitude, then control the motor 10 to stop rotating. It can be understood that the first set amplitude is greater than the amplitude of the current pulse generated when only one motor shaft 11 rotates idly.

[0101] In summary, in most cases, it can be determined that both ends of the clothes drying rod are retracted in place based on the time interval between at least two current pulses being less than the first set value T0; when it cannot be determined based on the time interval, then it is determined based on the amplitude of the current pulse.

[0102] In some embodiments, when the wire reel 41 winds up the steel wire rope 42, if the time interval between any two adjacent current pulses among the multiple current pulses detected within the first set time period is equal to the first set value T0, then compare the amplitudes of each current pulse. If the amplitudes of the current pulses are not greater than the first set amplitude, then control the motor 10 to stop rotating and send a first alarm message.

[0103] In some embodiments, when the wire reel 41 releases the steel wire rope 42, if the number of detected current pulses exceeds the first set value and the time interval between any two current pulses is not less than the first set value T0, then control the motor 10 to stop rotating and send a second alarm message.

[0104] In some embodiments, one of the motor shaft 11 and the input shaft 21 is engaged with the sliding sleeve 31 through the limiting groove 33 and the limiting protrusion 34, and the resistance overcome by the motor shaft 11 is the resistance generated when the limiting protrusion 34 disengages from the limiting groove 33 to drive the sliding sleeve 31 to slide and compress the elastic member 32. In some embodiments, the sliding sleeve 31 itself has elasticity, and the resistance overcome by the motor shaft 11 is the resistance generated when the limiting protrusion 34 disengages from the limiting groove 33 and squeezes the sliding sleeve 31 to deform.

[0105] When only one motor shaft 11 idles, in the generated current waveform diagram, the time interval between adjacent current pulses is related to the number of the limiting grooves 33 and the limiting protrusions 34. When a set of the limiting grooves 33 and the limiting protrusions 34 are provided, when the motor shaft 11 idles, the motor shaft 11 needs to overcome the resistance generated when the limiting protrusion 34 disengages from the limiting groove 33 to drive the sliding sleeve 31 to slide and compress the elastic member 32 every time it rotates 360 degrees. When two sets of the limiting grooves 33 and the limiting protrusions 34 are provided, when the motor shaft 11 idles, the motor shaft 11 needs to overcome the resistance generated when the limiting protrusion 34 disengages from the limiting groove 33 to drive the sliding sleeve 31 to slide and compress the elastic member 32 every time it rotates 180 degrees. Therefore, the first set value T0 can be set according to the actual structure of the clothes dryer.

[0106] When the clothes dryer does not receive the storage instruction, the clothes dryer can control the motor shaft 11 to rotate forward or backward according to the received rising, falling or pausing instruction.

[0107] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, there are various changes and modifications to the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A lifting device for a clothes dryer, characterized in that, Comprising: A power mechanism, including a motor (10) and a transmission assembly. The motor (10) has two motor shafts (11), and a set of the transmission assembly is provided corresponding to each motor shaft (11). The transmission assembly includes an input shaft (21) and an output shaft, and the input shaft (21) is in transmission connection with the output shaft; At least one set of protection assemblies (30), which are transmission - arranged between the motor shaft (11) and the input shaft (21). When the input shaft (21) stops rotating and the corresponding motor shaft (11) rotates, the motor shaft (11) overcomes the resistance of the protection assembly (30) and disengages from the input shaft (21) in terms of transmission so that the motor shaft (11) idles; Two sets of wire - winding assemblies (40), the wire - winding assembly (40) includes a wire - winding wheel (41) and a steel wire rope (42). One wire - winding wheel (41) is arranged on each output shaft, and the steel wire rope (42) is wound around the wire - winding wheel (41).

2. The clothes drying machine lifting device according to claim 1, characterized in that, The protection assembly (30) includes a sliding sleeve (31) and an elastic member (32). One of the motor shaft (11) and the input shaft (21) is in cooperation with the sliding sleeve (31) through a limit groove (33) and a limit protrusion (34), and the elastic member (32) is arranged between the other one and the sliding sleeve (31). The sliding sleeve (31) can slide along the axial direction of the motor shaft (11), the limit protrusion (34) can slide into or out of the limit groove (33), and the resistance overcome by the motor shaft (11) is the resistance generated when the limit protrusion (34) disengages from the limit groove (33) and drives the sliding sleeve (31) to slide and compress the elastic member (32).

3. The clothes drying machine lifting device according to claim 2, characterized in that, The motor shaft (11) is in cooperation with the sliding sleeve (31) through the limit groove (33) and the limit protrusion (34), and the elastic member (32) is arranged between the input shaft (21) and the sliding sleeve (31).

4. The clothes drying machine lifting device according to claim 3, wherein, One end of the sliding sleeve (31) is sleeved on the motor shaft (11), the limit groove (33) is arranged at the end of the sliding sleeve (31), and the limit protrusion (34) is arranged on the motor shaft (11).

5. The clothes drying machine lifting device according to claim 3, characterized in that, One of the sliding sleeve (31) and the input shaft (21) is provided with a guide groove (35), and the other one is provided with a guide protrusion (36). The guide groove (35) extends parallel to the axial direction of the sliding sleeve (31), and the guide protrusion (36) penetrates through the guide groove (35) and can slide along the guide groove (35).

6. The clothes drying machine lifting device according to claim 2, characterized in that, The limit groove (33) includes a limit section (331) and a guide section (332). There are two guide sections (332) and they are distributed on both sides of the limit section (331). The limit section (331) is used to limit the limit protrusion (34), and the guide section (332) is used to guide the limit protrusion (34) to slide into or out of the limit groove (33).

7. The lifting device of the clothes dryer according to any one of claims 1-6, characterized in that, The transmission assembly further includes a first transmission shaft. The input shaft (21) is a worm, and a worm wheel (22) is provided on the first transmission shaft. The worm meshes with the worm wheel (22), and the first transmission shaft is in transmission connection with the output shaft.

8. A clothes dryer, characterized in that, It includes a main machine and a clothes drying rod. The clothes dryer further includes the clothes dryer lifting device according to any one of claims 1-7. The power mechanism is arranged on the main machine, and the steel wire rope (42) is connected to the clothes drying rod.

9. A control method for a clothes dryer, characterized in that, Applied to the clothes dryer according to claim 8, it includes: When the clothes dryer receives a storage instruction, the motor shaft (11) drives the input shaft (21) to rotate, drives the output shaft to rotate, and the wire reel (41) on the output shaft rotates along with the output shaft. The wire reel (41) winds up the steel wire rope (42). The current of the motor (10) is detected in real time by the detection assembly, and the motor (10) is controlled to stop rotating according to the current pulse and / or the current magnitude.

10. The control method of the clothes drying machine according to claim 9, characterized in that, Controlling the motor (10) to stop rotating according to the current pulse and / or the current magnitude includes: When a set of the protection assemblies (30) is provided, if at least one current pulse is detected and the current is greater than the first limit value Tmax, the motor (10) is controlled to stop rotating. When two sets of the protection assemblies (30) are provided, a set of the protection assemblies (30) is arranged between each motor shaft (11) and the input shaft (21); if the time interval between at least two detected current pulses is less than the first set value T0, the motor (10) is controlled to stop rotating.

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