Electric clothes airing machine, power system and stroke limiting device

Abstract

The utility model provides an electric clothes airing machine, a power system and a stroke limiting device.The stroke limiting device comprises a first switch, a second switch and a limiting control piece, the limiting control piece comprises a rotating disc, a first triggering piece and a second triggering piece, and the rotating disc is connected with a driving mechanism to drive the first triggering piece and the second triggering piece to rotate; the first switch and the second switch are both used for sending out an instruction for stopping the driving mechanism when being touched, the first triggering piece and the second triggering piece can coaxially rotate relative to a rotating shaft of the rotating disc, and the relative included angle of the first triggering piece and the second triggering piece on the rotating disc is adjustable. The driving mechanism is controlled through cooperation of the limiting control piece, the first switch and the second switch, the first triggering piece and the second triggering piece which are installed on the rotating disc can be driven by the driving mechanism to touch the first switch and the second switch respectively, then the stroke limiting function of the electric clothes airing machine is achieved, the structure is simple, and the practicability is high. The operation is convenient.

Description

Technical Field

[0001] The present application relates to the technical field of electric clothes drying machines, and more specifically, to an electric clothes drying machine, a power system and a travel limit device. Background Art

[0002] At present, electric clothes drying machines have appeared on the market, which are alternatives to hand-crank clothes drying racks. They include a main unit and a clothes drying rack. The main unit is fixed on the top of the balcony. A winding wheel and a motor are provided inside the main unit. The winding wheel is driven by the motor. A steel wire rope is wound around the winding wheel and connected to the clothes drying rack. The rotation of the motor is controlled so that the clothes drying rod is pulled up and down by the steel wire rope.

[0003] The motor is the core component of the electric clothes dryer, and the rising and falling limit protection devices play an even more important role. In the existing DC motor control system, a set of gears is often used to limit the upper and lower limit positions. When the upper and lower strokes need to be adjusted, the screws must be unscrewed first, the small gear connected to the motor shaft must be taken out, and then the upper limit gear set must be turned. After the upper limit position is determined, the small gear connected to the motor shaft must be installed, and then the upper gear paddle must be turned to the appropriate position to determine the lower limit. When the upper limit position needs to be adjusted again, the gear paddle of the lower limit must also be adjusted accordingly. This operation is more cumbersome, and when the clothes rack rises or falls beyond the limit position, the scissor rack of the clothes dryer will be damaged, and it will also cause serious consequences such as wire rope breakage, slot jumping, and even motor damage. Utility Model Content

[0004] In view of the shortcomings of the existing methods, the present application proposes an electric clothes drying machine, a power system and a travel limit device to solve the technical problems existing in the related technology that the adjustment of the upper and lower limit mechanisms is cumbersome, which may easily lead to wire rope breakage, rope jumping and even motor damage.

[0005] In the first aspect, an embodiment of the present application provides a travel limit device, which includes a first switch, a second switch and a limit control member, the limit control member includes a rotating disk, a first trigger member and a second trigger member, the rotating disk is connected to a driving mechanism to drive the first trigger member and the second trigger member to rotate and touch the first switch and the second switch respectively, the first switch and the second switch are both used to issue an instruction to stop the driving mechanism when touched, the first trigger member and the second trigger member can both rotate coaxially relative to the rotating axis of the rotating disk, and the relative angle between the first trigger member and the second trigger member on the rotating disk is adjustable.

[0006] It is further provided that the rotating disk comprises a first side and a second side which are arranged opposite to each other, wherein the first side is provided with inner teeth extending along its circumference, and the inner teeth are used to be connected with the driving mechanism.

[0007] Further configuration: the first trigger member includes an inner connecting sleeve and a first trigger rod, the inner connecting sleeve is sleeved on the rotating shaft of the rotating disk, one end of the first trigger rod is fixed to the inner connecting sleeve, and the other end thereof extends radially of the rotating disk and extends to the outside of the rotating disk.

[0008] It is further configured that the second trigger member includes an outer connecting ring and a second trigger rod, the outer connecting ring is arranged on the outer periphery of the rotating disk, and the second trigger rod is arranged on the outer edge of the outer connecting ring and extends radially along the outer connecting ring.

[0009] Further configuration: a positioning ring is provided on the second side of the rotating disk opposite to the first side, the first trigger member is located in the positioning and cooperates with the positioning ring, the second trigger member is arranged around the positioning ring and cooperates with the positioning ring, the first trigger member and the second trigger member can both rotate unidirectionally relative to the positioning ring, and the rotation directions of the first trigger member and the second trigger member are opposite.

[0010] The inner and outer circumferences of the positioning ring are respectively provided with inner ratchet teeth and outer ratchet teeth, the inner connecting sleeve of the first trigger member is provided with an inner pawl extending outwardly and cooperating with the inner ratchet teeth of the positioning ring, the outer connecting ring of the second trigger member is provided with an outer pawl extending inwardly and cooperating with the outer ratchet teeth of the positioning ring, and the inner and outer ratchet teeth of the positioning ring are in opposite directions.

[0011] It is further provided that: a plurality of inner pawls are arranged along the circumference of the inner connecting sleeve, and a plurality of outer pawls are arranged along the circumference of the outer connecting ring.

[0012] It is further provided that: a support block is provided on the inner peripheral side wall of the outer connecting ring, and the axial position of the rotating disk is limited between the support block of the outer connecting ring and the inner connecting sleeve.

[0013] Further configuration: the first switch and the second switch each include a switch seat, a momentary switch and a spring, the momentary switch is arranged on the switch seat, one end of the spring is fixed to the switch seat, and the other end is a free end, and the momentary switch is located between the spring and the switch seat, and the spring contacts the momentary switch to realize the control of the drive mechanism by the limit switch.

[0014] In the second aspect, an embodiment of the present application provides a power system, characterized in that it includes a driving mechanism, a winding wheel, a wire rope and a travel limit device as described above, wherein the wire rope is wound around the winding wheel, the driving mechanism is connected to the winding wheel to drive the winding wheel to rotate, and the travel limit device is connected to the driving mechanism to limit the wire rope retraction and release stroke.

[0015] In a third aspect, an embodiment of the present application provides an electric clothes drying machine, comprising a clothes drying rod and a main unit, wherein the main unit comprises the power system as described above.

[0016] The beneficial technical effects brought about by the technical solution provided by the embodiment of the present application include:

[0017] 1. In the travel limit device of the present application, the control stop of the driving mechanism is achieved by the cooperation of the limit control component with the first switch and the second switch. The driving mechanism is connected to the rotating disk in the limit control component, so that the first trigger component and the second trigger component installed on the rotating disk can be driven by the driving mechanism to rotate to touch the first switch and the second switch, thereby realizing the travel limit function of the clothes drying rack of the electric clothes drying machine. The structure is simple and the operation is convenient.

[0018] 2. In the stroke limit device of the present application, the stroke range is adjusted by adjusting the angle between the first trigger member and the second trigger member on the rotating disk. The larger the angle between the first trigger rod and the second trigger rod, the shorter the stroke of the clothes drying rack. Conversely, the smaller the angle between the first trigger rod and the second trigger rod, the longer the stroke of the clothes drying rack. Therefore, the positions of the first trigger rod and the second trigger rod relative to the rotating disk can be adjusted according to actual use needs to meet the requirements of stroke range adjustment.

[0019] 3. In the travel limit device of the present application, the first trigger member, the second trigger member and the rotating disk are connected by a two-way ratchet pawl structure. The one-way self-locking characteristic of the ratchet pawl makes the first trigger rod and the second trigger rod and the rotating disk only able to rotate in one direction. Then, by providing a positioning ring with inner and outer ratchets in opposite directions on the rotating disk to cooperate with the first trigger member and the second trigger member respectively, it can be satisfied that when the first trigger rod or the second trigger rod rotates relative to the rotating disk, the rotating disk is fixed to the second trigger rod or the first trigger rod, thereby achieving the purpose of adjusting the angle between the first trigger rod and the second trigger rod. The present application integrates the first trigger member, the second trigger member and the rotating disk into one by a two-way ratchet pawl structure, which has a simple structure and is easy to adjust. The angle between the first trigger rod and the second trigger rod can be accurately controlled according to the ratchet distance of the positioning ring, and the user can adjust the lifting height of the clothes drying rack more accurately and conveniently.

[0020] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1 A schematic diagram of the structure of the cooperation between the first trigger member and the second trigger member in the travel limit device provided in an embodiment of the present application;

[0023] Figure 2A schematic diagram of the structure of a limit control component in a travel limit device provided in an embodiment of the present application.

[0024] In the figure, 1, first switch; 11, switch seat; 12, momentary switch; 13, spring; 2, second switch; 3, limit control member; 31, rotating disk; 311, rotating shaft; 312, inner teeth; 313, positioning ring; 314, inner ratchet; 315, outer ratchet; 32, first trigger member; 321, inner connecting sleeve; 322, first trigger rod; 323; inner ratchet; 33, second trigger member; 331, outer connecting ring; 332, second trigger rod; 333, outer ratchet; 334, support block; 4, screw. DETAILED DESCRIPTION

[0025] The embodiments of the present application are described below in conjunction with the drawings in the present application. It should be understood that the implementation methods described below in conjunction with the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0026] It will be understood by those skilled in the art that, unless otherwise stated, the "said" and "the" used herein may also include plural forms. It should be further understood that the term "including" used in the specification of the present application refers to the presence of the features, elements and / or components, but does not exclude the implementation of other features, elements, components and / or their combinations supported by the technical field. The term "and / or" used herein refers to at least one of the items defined by the term, for example, "A and / or B" can be implemented as "A", or as "B", or as "A and B".

[0027] In the description of the present application, the directions or positional relationships indicated by words such as "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the exemplary directions or positional relationships shown in the accompanying drawings. They are for the convenience of describing or simplifying the description of the embodiments of the present application, and do not indicate or imply that the referred device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0031] See also Figure 1 and Figure 2 The present application discloses a travel limit device, which includes a first switch 1, a second switch 2 and a limit control component 3. The travel limit device of the present application can be set in an electric clothes dryer. By connecting the first switch 1 and the second switch 2 with the travel limit mechanism of the electric clothes dryer, the limit control component 3 can control the first switch 1 and the second switch 2 respectively to stop the driving mechanism of the electric clothes dryer. That is, the travel limit device of the present application realizes the travel limit function of the clothes drying rack of the electric clothes dryer by controlling the stop of the driving mechanism, reducing the number of separately set limit devices and optimizing the internal structure of the electric clothes dryer. The travel limit device of this embodiment is easy to adjust in structure and easy to assemble.

[0032] Specifically, the limit control component 3 can be used to control the first switch 1 and the second switch 2 respectively, and includes a first trigger component 32, a second trigger component 33 and a rotating disk 31. The rotating disk 31 is connected to the driving mechanism to drive the first trigger component 32 and the second trigger component 33 to rotate and touch the first switch 1 and the second switch 2 respectively when the driving mechanism is running. When the first switch 1 and the second switch 2 are touched, they can respectively issue instructions to stop the driving mechanism, thereby stopping the driving mechanism. The first trigger component 32 touches the first switch 1 to stop the driving mechanism, and the second trigger component 33 correspondingly touches the second switch 2 to stop the driving mechanism. The first trigger component 32 and the second trigger component 33 can both rotate relative to the axis of the rotating disk 31, and the relative angle between the first trigger component 32 and the second trigger component 33 on the rotating disk 31 is adjustable. The lifting stroke of the electric clothes dryer can be adjusted by adjusting the angle between the first trigger component 32 and the second trigger component 33.

[0033] The rotating disk 31 includes a first side and a second side that are arranged opposite to each other. The first side of the rotating disk 31 is provided with an inner tooth 312 extending along its circumference. The inner tooth 312 is used to connect with a driving mechanism. The driving mechanism can drive the rotating disk by cooperating with the inner tooth 312. The driving mechanism used in this embodiment is a motor. A screw 4 is connected to the output shaft of the motor. The rotating disk 31 is meshed with the screw 4 through its inner tooth 312, so that the rotating disk 31 can be driven to rotate when the motor rotates.

[0034] The rotating disk 31 is provided with a rotating shaft 311 extending in the axial direction on its second side. The first trigger member 32 is mounted on the rotating shaft 311. The first trigger member 32 includes an inner connecting sleeve 321 and a first trigger rod 322. The inner connecting sleeve 321 is sleeved on the rotating shaft 311 and can rotate relative to the rotating shaft 311. One end of the first trigger rod 322 is connected to the inner connecting sleeve 321, and the other end thereof extends to the outside of the rotating disk 31 along the radial direction of the inner connecting sleeve 321. The second trigger member 33 includes an outer connecting ring 331 and a second trigger rod 332. The rotating disk 31 is located in the outer connecting ring 331. The outer diameter of the rotating disk 31 is adapted to the inner diameter of the outer connecting ring 331. The second trigger rod 332 is arranged on the outer periphery of the outer connecting ring 331 and extends along the radial direction of the outer connecting ring 331. In addition, a support block 334 is provided on the inner wall of the outer connecting ring 331, and the axial position of the rotating disk 31 is limited between the support block 334 of the outer connecting ring 331 and the inner connecting sleeve 321, and the first trigger rod 322 and the second trigger rod 332 are respectively located at different axial positions of the rotating disk 31, ensuring that the axial positions of the first trigger rod 322 and the second trigger rod 332 are staggered along the rotating shaft, so as to facilitate the adjustment of the positions of the first trigger rod 322 and the second trigger rod 332 respectively, and avoid conflict during the process of rotating the first trigger rod 322 and the second trigger rod 332 respectively.

[0035] In this embodiment, a plurality of support blocks 334 are arranged along the circumference of the outer connecting ring 331 to provide multi-point support for the rotating disk 31 to prevent the rotating disk 31 from being separated from the outer connecting ring 331 and ensure the structural stability of the limit control member 3 of this application.

[0036] In addition, the first trigger rod 322 and the second trigger rod 332 in the above-mentioned limit control member 3 can both rotate relative to the rotating disk 31. The rotating disk 31 is provided with a positioning ring 313 on its second side, and the positioning ring 313 is fixed to the rotating disk 31. The inner connecting sleeve 321 of the first trigger member 32 is located in the positioning ring 313, and the outer connecting ring 331 of the second trigger member 33 is located on the outer periphery of the positioning ring 313. The inner periphery and outer periphery of the positioning ring 313 are respectively provided with inner ratchet teeth 314 and outer ratchet teeth 315, and the directions of the inner ratchet teeth 314 and the outer ratchet teeth 315 are opposite. The inner connecting sleeve 321 is provided with an inner pawl 323 extending outward and cooperating with the inner ratchet teeth 314 of the positioning ring 313, and the inner side of the outer connecting ring 331 is provided with an outer pawl 333 extending inward and cooperating with the outer ratchet teeth 315 of the positioning ring 313. The ratchet pawl matching structure can realize the unidirectional rotation of the first trigger rod 322 and the second trigger rod 332 relative to the rotating disk 31. It is known that the inner ratchet 314 and the outer ratchet 315 in this embodiment are in opposite directions, so the first trigger rod 322 and the second trigger rod 332 can rotate in opposite directions relative to the rotating disk 31.

[0037] Due to the one-way self-locking characteristic of the ratchet pawl, when the first trigger member 32 rotates relative to the rotating disk 31, the outer pawl 333 of the second trigger member 33 abuts against the outer ratchet 315 of the positioning ring 313, and the rotating disk 31 is restricted by the second trigger member 33 and cannot rotate, so that the relative angle between the first trigger rod 322 and the second trigger rod 332 on the rotating disk 31 can be adjusted; similarly, when the second trigger member 33 needs to rotate relative to the rotating disk 31, the rotating disk 31 is restricted by the first trigger member 32 and cannot rotate, that is, the angle between the first trigger rod 322 and the second trigger rod 332 on the rotating disk 31 can also be adjusted by rotating the second trigger member 33. However, when the motor drives the rotating disk 31, since the inner ratchet 314 and the outer ratchet 315 on the inner and outer sides of the positioning ring 313 abut against the inner pawl 323 and the pawl respectively, the first trigger member 32 and the second trigger member 33 cannot rotate relative to the rotating disk 31, so as to drive the first trigger member 32 and the second trigger member 33 to rotate synchronously with the rotating disk 31. In addition, the lifting and lowering stroke of the clothes drying rack of the electric clothes drying machine of the present application is mainly determined by the superior angles of the first trigger rod 322 and the second trigger rod 332 on the rotating disk 31. The arc length corresponding to the superior angles of the first trigger rod 322 and the second trigger rod 332 is the path range that the motor can drive the rotating disk 31 to rotate. The path range is related to the maximum number of revolutions of the motor, thereby achieving the purpose of adjusting the range of the number of revolutions of the motor by adjusting the relative angle between the first trigger rod 322 and the second trigger rod 332 on the rotating disk 31. The lifting and lowering range of the clothes drying rack is related to the number of revolutions of the motor, thereby achieving the purpose of adjusting the lifting and lowering stroke range of the clothes drying rack of the electric clothes drying machine.

[0038] Further, multiple inner ratchet pawls 323 are provided along the circumference of the inner connecting sleeve 321, and multiple outer ratchet pawls 333 are also provided along the circumference of the outer connecting ring 331. Through the cooperation of multiple inner ratchet teeth 314 and outer ratchet teeth 315 with the positioning ring 313, the stability of the structural locking of the travel limit device of the present application can be improved. In this embodiment, three inner ratchet pawls 323 are provided and evenly distributed along the circumference of the inner connecting sleeve 321, and three outer ratchet pawls 333 are also provided and evenly distributed along the circumference of the outer connecting ring 331.

[0039] The present application realizes the stopping of the motor at the upper limit point and the lower limit point of the clothes drying machine by the first trigger rod 322 and the second trigger rod 332 of the limit control member 3 contacting the first switch 1 and the second switch 2 respectively. The first switch 1 and the second switch 2 both include a switch seat 11, a moment switch 12 and a spring 13. The moment switch 12 is arranged on the switch seat 11. One end of the spring 13 is fixed to the switch seat 11, and the other end is a free end. The moment switch 12 is between the spring 13 and the switch seat 11. When the motor drives the trigger rod of the limit control member 3 to contact the spring 13 of one of the limit switches, the spring 13 squeezes the moment switch 12 to control the motor; when the motor reverses and drives the limit control member 3 to rotate in the opposite direction, so that the trigger rod is away from the spring 13 it contacts, the spring 13 returns to its original position due to its elastic recovery effect, and the motor operates normally until it rotates to contact the spring 13 of the other limit switch.

[0040] In this embodiment, the first switch 1 and the second switch 2 are arranged side by side, and the free ends of the springs 13 of the first switch 1 and the second switch 2 are close to each other, that is, the springs 13 of the first switch 1 and the second switch 2 are arranged opposite to the opening of the switch seat 11, so as to ensure that when the limit control member 3 contacts the spring 13, the sensitivity of the first switch 1 and the second switch 2 is consistent.

[0041] In addition, it should be noted that the travel limit device of the present application is not only used in the lifting travel switch of the electric clothes drying machine, but can also be used in equipment involving the detection of the travel range.

[0042] In summary, the travel limit device of the present application controls the stop of the driving mechanism through the cooperation of the limit control component 3 with the first switch 1 and the second switch 2. The driving mechanism is connected to the rotating disk 31 in the limit control component 3, so that the first trigger component 32 and the second trigger component 33 installed on the rotating disk 31 can touch the first switch 1 and the second switch 2 under the drive of the driving mechanism, and then the driving mechanism can be controlled to realize the travel limit function of the electric clothes dryer.

[0043] The present application achieves the adjustment of the travel range by adjusting the angle between the first trigger member 32 and the second trigger member 33 on the rotating disk 31. The larger the angle between the first trigger rod 322 and the second trigger rod 332, the shorter the travel of the clothes drying rack. Conversely, the smaller the angle between the first trigger rod 322 and the second trigger rod 332, the longer the travel of the clothes drying rack. Therefore, the positions of the first trigger rod 322 and the second trigger rod 332 relative to the rotating disk 31 can be adjusted according to actual use needs to meet the requirements of travel range adjustment.

[0044] The first trigger member 32 and the second trigger member 33 of the present application are connected to the rotating disk 31 through a ratchet pawl structure. The one-way self-locking feature of the ratchet pawl allows the first trigger rod 322 and the second trigger rod 332 to only rotate in one direction with the rotating disk 31. By providing a positioning ring 313 with inner ratchet teeth 314 and outer ratchet teeth 315 in opposite directions on the rotating disk 31 to cooperate with the first trigger member 32 and the second trigger member 33 respectively, the rotating disk 31 can be fixed with the second trigger rod 332 or the first trigger rod 322 when the first trigger rod 322 or the second trigger rod 332 rotates relative to the rotating disk 31, thereby achieving the purpose of adjusting the angle between the first trigger rod 322 and the second trigger rod 332. When the rotating disk 31 is driven by the motor, due to the one-way self-locking property of the ratchet pawl structure, the first trigger rod 322 and the second trigger rod 332 cannot rotate relative to the rotating disk 31, thereby driving the first trigger rod 322 and the second trigger rod 332 to rotate synchronously, avoiding the rotation of the rotating disk 31 and affecting the change of the relative position of the first trigger rod 322 and the second trigger rod 332, thereby ensuring that the lifting stroke of the electric clothes drying machine is determined. The present application integrates the first trigger member 32, the second trigger member 33 and the rotating disk 31 into one body through a two-way ratchet pawl structure, which has a simple structure and is easy to adjust. The angle between the first trigger rod 322 and the second trigger rod 332 can be accurately controlled according to the ratchet distance of the positioning ring 313, and the user can adjust the lifting height of the clothes drying rack more accurately and conveniently.

[0045] The present application also discloses a power system, which includes a driving mechanism, a winding wheel, a wire rope and the stroke limit device mentioned above, the wire rope is wound on the winding wheel, the driving mechanism is connected to the winding wheel to drive the winding wheel to rotate, and the stroke limit device is connected to the driving mechanism to limit the wire rope retracting and releasing stroke. Specifically, in this embodiment, the driving mechanism adopts a motor, the rotating shaft of the motor is connected to the winding wheel, and a screw 4 is connected to the output shaft of the motor. The stroke limit device is connected to the screw 4, and the number of rotations of the winding wheel is also limited according to the number of rotations of the motor, thereby achieving the purpose of controlling the wire rope retracting and releasing stroke.

[0046] The present application also discloses an electric clothes drying machine, comprising a clothes drying rod and a main unit, wherein the main unit comprises the power system as described above. The electric clothes drying machine adopts the power system with a travel limit function, and the free end of the steel wire rope in the power system is connected to the clothes drying rod, so that the lifting and lowering travel of the clothes drying rod is controlled by controlling the retraction and extension travel of the steel wire rope. The structure is simple and the operation is convenient, so that the user can adjust the lifting and lowering height of the clothes drying rod more accurately and conveniently.

[0047] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0048] The above is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the scheme of the present application, other similar implementation methods based on the technical ideas of the present application are also within the protection scope of the embodiments of the present application.

Claims

1. A travel limit device, characterized in that: The invention comprises a first switch (1), a second switch (2) and a limit control member (3); the limit control member (3) comprises a rotating disk (31), a first trigger member (32) and a second trigger member (33); the rotating disk (31) is connected to a driving mechanism to drive the first trigger member (32) and the second trigger member (33) to rotate and touch the first switch (1) and the second switch (2) respectively; the first switch (1) and the second switch (2) are both used to issue an instruction to stop the driving mechanism when touched; the first trigger member (32) and the second trigger member (33) can rotate coaxially with respect to the rotating shaft of the rotating disk (31), and the relative angle between the first trigger member (32) and the second trigger member (33) on the rotating disk (31) is adjustable.

2. The travel limit device according to claim 1, characterized in that: The rotating disk (31) comprises a first side and a second side which are arranged opposite to each other, wherein the first side is provided with internal teeth (312) extending along its circumference, and the internal teeth (312) are used to be connected with a driving mechanism.

3. The travel limit device according to claim 2, characterized in that: The first trigger member (32) comprises an inner connecting sleeve (321) and a first trigger rod (322), wherein the inner connecting sleeve (321) is sleeved on the rotating shaft (311) of the rotating disk (31), and one end of the first trigger rod (322) is fixed to the inner connecting sleeve (321), and the other end thereof extends radially of the rotating disk (31) to the outside of the rotating disk (31).

4. The travel limit device according to claim 3, characterized in that: The second trigger member (33) comprises an outer connecting ring (331) and a second trigger rod (332); the outer connecting ring (331) is arranged on the outer periphery of the rotating disk (31); and the second trigger rod (332) is arranged on the outer edge of the outer connecting ring (331) and extends in the radial direction of the outer connecting ring (331).

5. The travel limit device according to claim 4, characterized in that: A positioning ring (313) is provided on the second side of the rotating disk (31) opposite to the first side thereof; the first trigger member (32) is located on the positioning ring (313) and cooperates with the positioning ring (313); the second trigger member (33) is arranged around the positioning ring (313) and cooperates with the positioning ring (313); both the first trigger member (32) and the second trigger member (33) can rotate in one direction relative to the positioning ring (313), and the rotation directions of the first trigger member (32) and the second trigger member (33) are opposite.

6. The travel limit device according to claim 5, characterized in that: The inner periphery and outer periphery of the positioning ring (313) are respectively provided with inner ratchet teeth (314) and outer ratchet teeth (315); the inner connecting sleeve (321) of the first trigger member (32) is provided with an inner ratchet pawl (323) extending outward and cooperating with the inner ratchet teeth (314) of the positioning ring (313); the outer connecting ring (331) of the second trigger member (33) is provided with an outer ratchet pawl (333) extending inward and cooperating with the outer ratchet teeth (315) of the positioning ring (313); the inner ratchet teeth (314) and the outer ratchet teeth (315) of the positioning ring (313) are in opposite directions.

7. The travel limit device according to claim 6, characterized in that: A plurality of the inner ratchet claws (323) are arranged along the circumference of the inner connecting sleeve (321), and a plurality of the outer ratchet claws (333) are arranged along the circumference of the outer connecting ring (331).

8. The travel limit device according to claim 5, characterized in that: A support block (334) is provided on the inner peripheral side wall of the outer connecting ring (331), and the axial position of the rotating disk (31) is limited between the support block (334) of the outer connecting ring (331) and the inner connecting sleeve (321).

9. The travel limit device according to claim 1, characterized in that: The first switch (1) and the second switch (2) both comprise a switch seat (11), a moment switch (12) and a spring (13); the moment switch (12) is arranged on the switch seat (11); one end of the spring (13) is fixed to the switch seat (11) and the other end is a free end; the moment switch (12) is located between the spring (13) and the switch seat (11); the spring (13) and the moment switch (12) are in contact to realize the control of the drive mechanism by the limit switch.

10. A power system, characterized in that: It comprises a driving mechanism, a winding wheel, a wire rope and a travel limiting device as described in any one of claims 1 to 9, wherein the wire rope is wound around the winding wheel, the driving mechanism is connected to the winding wheel to drive the winding wheel to rotate, and the travel limiting device is connected to the driving mechanism to limit the wire rope retraction and release travel.

11. An electric clothes drying machine, characterized in that: It comprises a drying rod and a host, and the host comprises the power system as claimed in claim 10.

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