Power module and clothes airing machine

Abstract

The utility model relates to the technical field of household appliances, in particular to a power module and a clothes airing machine, the power module can be used for the clothes airing machine, the power module comprises a motor, two worms and two power transmission assemblies, the two worms are both in transmission connection with the motor, and the two worms are located at the two opposite ends of the motor respectively; the two power transmission mechanisms are in transmission fit with the two worms in a one-to-one correspondence manner; the power transmission mechanism comprises a first worm gear transmission assembly, a second worm gear transmission assembly and a first gear, the first worm gear transmission assembly and the second worm gear transmission assembly are both in transmission connection with the worm, and the first worm gear transmission assembly and the second worm gear transmission assembly are distributed on the two sides of the axis of the worm in the set direction. An included angle is formed between the set direction and the axis of the worm; the first worm gear transmission assembly and the second worm gear transmission assembly are both in transmission fit with the first gear. According to the power module, the self-locking capacity can be improved, and then the problem of tackle is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and more specifically, to a power module and a clothes drying rack. Background Technology

[0002] Clothes drying racks are becoming increasingly popular because their lifting function improves the convenience of drying clothes.

[0003] The clothes drying rack provided by the relevant technology includes a clothes drying rod, a connecting rope, and a power module. The clothes drying rod is connected to the power module through the connecting rope, so that the clothes drying rod can be raised and lowered by the power module retracting the connecting rope.

[0004] However, the power module provided by the relevant technology has weak self-locking ability when static, and is prone to slippage problems. That is, the connecting rope is prone to automatically extending under the gravity of the clothesline, which causes the clothes hanging on the clothesline to fall to the ground, reducing the user experience. Utility Model Content

[0005] The purpose of this utility model is to provide a power module and a clothes drying rack. The power module can be used in the clothes drying rack. The power module can improve the self-locking ability, thereby effectively improving the pulley problem and the problem of the connecting rope automatically extending under the gravity of the clothes drying rod. This also improves the problem of clothes and the clothes drying rod accidentally falling to the ground together when clothes are hanging on the clothes drying rod, thereby enhancing the user experience.

[0006] The embodiments of this utility model can be implemented as follows:

[0007] In a first aspect, this utility model provides a power module, which includes:

[0008] Electric motor;

[0009] Two worm gears, both of which are connected to the motor drive, and the two worm gears are located at opposite ends of the motor; and,

[0010] Two power transmission mechanisms, each corresponding to a worm gear in a one-to-one transmission engagement; among them...

[0011] The power transmission mechanism includes a first worm gear transmission assembly, a second worm gear transmission assembly, and a first gear. Both the first and second worm gear transmission assemblies are connected to the worm gear transmission, and are distributed on both sides of the worm's axis along a predetermined direction, with the predetermined direction forming an angle with the worm's axis. Both the first and second worm gear transmission assemblies are engaged with the first gear transmission.

[0012] In an optional embodiment, the power transmission mechanism further includes a clearance-increasing gear assembly, and at least one of the first worm gear transmission assembly and the second worm gear transmission assembly is connected to the first gear transmission via the clearance-increasing gear assembly.

[0013] In an optional embodiment, the first worm gear transmission assembly includes a second gear and a first worm gear, the first worm gear meshing with a worm, and the first worm gear engaging with the first gear via the second gear.

[0014] In an optional embodiment, the first worm gear transmission assembly further includes a third gear, and the second gear is coaxially connected to the first worm gear, and the second gear engages with the first gear through the third gear.

[0015] In an optional embodiment, the axes of the two worms coincide or are distributed in parallel; along a set direction, the first worm gear transmission components of the two power transmission mechanisms are distributed on the same side or opposite sides of the axis of any one of the worms.

[0016] In an optional embodiment, the module ratio of the second gear to the first worm gear is 2 to 3:1; and / or,

[0017] The gear ratio between the second gear and the first worm gear is 0.3 to 0.4:1; and / or,

[0018] The module of the first worm gear is 0.500–0.600 mm; and / or,

[0019] The lead angle of the first worm gear is 4.500° to 4.600°.

[0020] In an optional embodiment, the second worm gear transmission assembly includes a second worm gear and a fourth gear. The second worm gear meshes with a worm, the fourth gear is coaxially connected to the second worm gear, and the fourth gear is in transmission engagement with the first gear.

[0021] In an optional implementation, the gear ratio of the first worm gear to the second gear is equal to the gear ratio of the second worm gear to the fourth gear.

[0022] In an optional implementation, the power module further includes two winding wheels, which are coaxially connected to the first gears of the two power transmission mechanisms in a one-to-one correspondence. The winding wheels are used to wind up and unwind the connecting rope.

[0023] Secondly, this utility model provides a clothes drying rack, which includes two connecting ropes and the aforementioned power module. The power module also includes two winding wheels, which are coaxially connected to the first gears of two power transmission mechanisms in a one-to-one correspondence. The two connecting ropes are wound around the two winding wheels in a one-to-one correspondence. The axes of the two worm gears coincide or are distributed in parallel.

[0024] Along the set direction, the two connecting ropes are pulled out from the corresponding winding reels at positions on the same side or opposite sides of the axis of any worm gear.

[0025] The beneficial effects of the power module and clothes dryer of this utility model embodiment include: The motor of the power module provided in this utility model embodiment is driven by worm gears at both ends, and each worm gear can be driven and cooperated with the power transmission mechanism. The first worm gear transmission component and the second worm gear transmission component of the power transmission mechanism are both driven and connected to the worm gears, and both are driven and cooperated with the first gear. In this way, there are two force transmission paths from the first gear to the worm gear: the first gear transmits the load to the worm gear through the force transmission paths provided by the first worm gear transmission component and the second worm gear transmission component. The stress on the first and second worm gear transmission components is reduced. Furthermore, the self-locking ability between the first and second worm gear transmission components and the worm gear can be improved by reducing the module and lead angle of the first and second worm gear transmission components, thereby improving the problem of slippage in the power module.

[0026] The clothes drying rack of this utility model embodiment includes all the beneficial effects of the aforementioned power module, such as: providing the power module with self-locking capability, effectively improving the slippage problem, thereby improving the problem of the connecting rope automatically extending under the gravity of the clothes drying rod, and further improving the problem of clothes and the clothes drying rod accidentally falling to the ground together when clothes are hanging on the clothes drying rod, so as to improve the user experience. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the clothes drying rack in the embodiment of this utility model;

[0029] Figure 2 This is a schematic diagram of a partial structure of the power module in an embodiment of the present invention from a first-view perspective;

[0030] Figure 3 This is a schematic diagram of a partial structure of the power module in an embodiment of the present invention from a second perspective.

[0031] Figure 4 This is a partial structural schematic diagram of a power module according to another embodiment of the present invention;

[0032] Figure 5 This is a partial structural schematic diagram of a power module according to another embodiment of the present invention;

[0033] Figure 6 This is a partial structural diagram of the power module in other embodiments of the present invention;

[0034] Figure 7 This is a partial structural schematic diagram of a power module according to another embodiment of the present invention;

[0035] Figure 8 This is a partial structural diagram of a power module according to another embodiment of the present invention.

[0036] Icons: 010-Clothes drying rack; 100-Power module; 110-Motor; 111-Worm gear; 120-Power transmission mechanism; 130-First worm gear transmission assembly; 131-First worm gear; 132-Second gear; 133-Third gear; 140-Second worm gear transmission assembly; 141-Second worm gear; 142-Fourth gear; 150-First gear; 151-Winding reel; 161-Fifth gear; 162-Sixth gear; 163-Seventh gear; 200-Connecting rope; 300-Clothes drying rod. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0041] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0042] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0043] Please refer to Figure 1 This embodiment provides a clothes drying rack 010, which includes a clothes drying rod 300, two connecting ropes 200, and a power module 100. Both ends of the clothes drying rod 300 are connected to the two connecting ropes 200, and both connecting ropes 200 are connected to the power module 100 for transmission. The power module 100 is used to drive the connecting ropes 200 to extend and retract, thereby adjusting the height of the clothes drying rod 300. Thus, when clothes need to be hung on the clothes drying rod 300, the power module 100 releases the connecting ropes 200 to lower the height of the clothes drying rod 300. When the clothes are finished hanging, the power module 100 can also retract the connecting ropes 200 to raise the height of the clothes drying rod 300.

[0044] Further, please refer to Figure 1 and Figure 2 The power module 100 includes a gear power unit and two winding wheels 151. Both winding wheels 151 are connected to the gear power unit for transmission, and two connecting ropes 200 are wound around the two winding wheels 151 in a one-to-one correspondence. When the gear power unit drives the winding wheels 151 to rotate forward, the connecting ropes 200 are wound around the winding wheels 151 to lift the clothes drying rod 300. When the gear power unit drives the winding wheels 151 to rotate in reverse, the connecting ropes 200 are released from the winding wheels 151 to lower the clothes drying rod 300.

[0045] Furthermore, the power module 100 includes a housing (not shown in the figure), and the gear power unit and the winding reel 151 are both assembled in the mounting cavity of the housing; the housing is also provided with a through hole communicating with the mounting cavity, through which the connecting rope 200 enters and exits the mounting cavity and is wound and unwound by the winding reel 151. The structure of the housing is similar to that of related technologies, and will not be described in detail here.

[0046] The structure of the gear power unit can be configured as needed. In this embodiment, please refer to... Figure 2 and Figure 3 The gear power unit includes a motor 110, two worm gears 111, and two power transmission mechanisms 120. Both worm gears 111 are connected to the motor 110 and are located at opposite ends of the motor 110. The two power transmission mechanisms 120 are in one-to-one transmission engagement with the two worm gears 111. Each power transmission mechanism 120 includes a first worm gear transmission assembly 130, a second worm gear transmission assembly 140, and a first gear 150. Both the first worm gear transmission assembly 130 and the second worm gear transmission assembly 140 are connected to the worm gears 111, and the first worm gear transmission assembly 130 and the second worm gear transmission assembly 140 are in one-to-one transmission engagement with the worm gears 111. Two worm gear transmission assemblies 140 are distributed on both sides of the axis of the worm 111 along a set direction, and the set direction is distributed at an angle to the axis of the worm 111 (that is, the first worm gear transmission assembly 130 is distributed on one side of the axis of the worm 111 along the set direction, and the second worm gear transmission assembly 140 is distributed on the other side of the axis of the worm 111 along the set direction); both the first worm gear transmission assembly 130 and the second worm gear transmission assembly 140 are in transmission cooperation with the first gear 150; the two winding wheels 151 are coaxially connected to the first gear 150 of the two power transmission mechanisms 120 in a one-to-one correspondence, and the axes of the two worms 111 coincide.

[0047] The inventors discovered that in the related technology, the worm 111 is only connected to the first gear 150 through a single worm gear transmission assembly. The load on the first gear 150 and the corresponding winding wheel 151 can only be transmitted to the worm 111 through the single worm gear transmission assembly. That is, there is only one force transmission path from the first gear 150 to the worm 111. The worm gear transmission assembly is subjected to a large stress. In order to avoid damage to the worm gear transmission assembly subjected to a large stress, the worm gear transmission assembly must maintain a large size, module and lead angle. This results in a limited self-locking ability between the worm gear transmission assembly and the worm 111. The connecting rope 200 is prone to automatically elongating under the weight of the clothesline 300 or the combined weight of the clothesline 300 and the clothes hanging on it. In this embodiment, there are two force transmission paths from the first gear 150 to the worm 111: the first gear 150 transmits the load to the worm 111 through the force transmission path provided by the first worm gear transmission assembly 130 and the second worm gear transmission assembly 140. The stress on the first worm gear transmission assembly 130 and the second worm gear transmission assembly 140 is reduced. Based on this, the self-locking ability between the first worm gear transmission assembly 130 and the second worm gear transmission assembly 140 and the worm 111 can be improved by reducing the module and lead angle of the first worm gear transmission assembly 130 and the second worm gear transmission assembly 140. This improves the problem of the power module 100 easily slipping, and correspondingly improves the problem of the connecting rope 200 automatically extending under the gravity of the clothes drying rod 300. This further improves the problem of clothes and the clothes drying rod 300 accidentally falling to the ground together when clothes are hanging on the clothes drying rod 300, thereby improving the user experience.

[0048] It should be understood that in other embodiments, the axes of the two worm gears 111 are parallel.

[0049] It should be noted that the motor 110 in this embodiment refers to a dual-head motor.

[0050] Optionally, the winding wheel 151 is coaxially and fixedly connected to the first gear 150, and the connection method includes, but is not limited to, integral molding and welding. Fixedly connecting the winding wheel 151 and the first gear 150 can ensure that the winding wheel 151 can reliably wind and unwind the connecting rope 200 under the drive of the gear power device.

[0051] Optionally, the first worm gear transmission assembly 130 includes a second gear 132 and a first worm gear 131. The first worm gear 131 meshes with the worm 111, and the first worm gear 131 is driven by the second gear 132 to engage with the first gear 150. This ensures that the worm 111, driven by the motor 110, can reliably drive the first gear 150 to rotate via the first worm gear 131 and the second gear 132, thereby reliably driving the winding reel 151 to wind and unwind the connecting rope 200.

[0052] Furthermore, the first worm gear transmission assembly 130 also includes a third gear 133. The second gear 132 is coaxially connected to the first worm gear 131, and the second gear 132 is in transmission engagement with the first gear 150 through the third gear 133. The second worm gear transmission assembly 140 includes a second worm gear 141 and a fourth gear 142. The second worm gear 141 meshes with the worm 111, and the fourth gear 142 is coaxially connected to the second worm gear 141, and the fourth gear 142 is in transmission engagement with the first gear 150. The arrangement of the third gear 133 avoids the problem of the first worm gear transmission assembly 130 and the second worm gear transmission assembly 140, which are distributed along a set direction on opposite sides of the axis of the worm 111, causing the gear power device to jam. In other words, the arrangement of the third gear 133 ensures that both the first worm gear transmission assembly 130 and the second worm gear transmission assembly 140 simultaneously drive the first gear 150 to rotate in the same direction, preventing the first gear 150 from jamming and causing the clothes dryer 010 to malfunction.

[0053] Alternatively, please refer to Figure 3 Along the set direction ( Figure 3 (in the direction of the arrow ab), the first worm gear transmission components 130 of the two power transmission mechanisms 120 are distributed on the same side of the axis of any one of the worms 111.

[0054] Of course, in other implementation methods, please refer to Figure 4 and Figure 5 Along a set direction, the first worm gear transmission components 130 of the two power transmission mechanisms 120 are distributed on opposite sides of the axis of any one of the worms 111.

[0055] It should be noted that the setting direction, the extension direction of the axis of the worm 111, and the extension direction of the rotation axis of the first worm wheel 131 are all perpendicular to each other; the rotation axes of the first worm wheel 131, the third gear 133, the first gear 150, and the second worm wheel 141 are distributed parallel to each other.

[0056] Optionally, in order to improve the self-locking capability of the gear transmission assembly, the module ratio of the second gear 132 to the first worm gear 131 is 2 to 3:1, for example, 2:1, 2.257:1, 3:1, etc., which are not specifically limited here; the tooth ratio of the second gear 132 to the first worm gear 131 is 0.3 to 0.4:1, for example, 0.3:1, 0.312:1, 0.4:1, etc., which are not specifically limited here.

[0057] Furthermore, the module of the first worm gear 131 is 0.500 to 0.600 mm, for example: 0.500 mm, 0.510 mm, 0.520 mm, 0.555 mm, 0.580 mm, 0.600 mm, etc., which are not specifically limited here; the lead angle of the first worm gear 131 is 4.500° to 4.600°, for example: 4.500°, 4.510°, 4.550°, 4.580°, 4.600°, etc., which are not specifically limited here.

[0058] In this embodiment, the first worm gear 131 has a module of 0.536 mm and a lead angle of 4.507°.

[0059] Optionally, the gear ratio of the first worm gear 131 to the second gear 132 is equal to the gear ratio of the second worm gear 141 to the fourth gear 142.

[0060] Furthermore, the ratio of the pitch circle diameters of the first worm gear 131 and the second gear 132 is equal to the ratio of the pitch circle diameters of the second worm gear 141 and the fourth gear 142. This arrangement ensures that the worm 111 can reliably drive the first worm gear transmission assembly 130 and the second worm gear transmission assembly 140, which are in transmission cooperation with it, to synchronously drive the first gear 150 to rotate. This, in turn, ensures that the winding reel 151, which is coaxially connected to the first gear 150, can reliably wind and unwind the connecting rope 200, thus ensuring the drive coordination between the worm 111 and the power transmission mechanism 120.

[0061] Optionally, the pitch circle diameter, number of teeth, module, and lead angle of the first worm gear 131 are the same as those of the second worm gear 141; the pitch circle diameter, diameter, number of teeth, and module of the second gear 132, the third gear 133, and the fourth gear 142 are all the same.

[0062] Of course, in other embodiments, at least one of the pitch circle diameter, number of teeth, module, and lead angle between the first worm gear 131 and the second worm gear 141 may be different; at least one of the pitch circle diameter, diameter, number of teeth, and module between the second gear 132, the third gear 133, and the fourth gear 142 may also be different.

[0063] Optionally, the first worm gear 131 is coaxially and fixedly connected to the second gear 132, and the second worm gear 141 is coaxially and fixedly connected to the fourth gear 142. The connection method includes, but is not limited to, integral molding and welding. In this way, the reliability of synchronous rotation of the first worm gear 131 and the second gear 132, as well as the reliability of synchronous rotation of the second worm gear 141 and the fourth gear 142, can be ensured.

[0064] Optionally, the mounting cavity of the housing is provided with multiple shaft holes. The rotating shaft fixedly connected to the first worm gear 131 and the second gear 132 is rotatably inserted into one of the shaft holes. The rotating shaft fixedly connected to the second worm gear 141 and the fourth gear 142 is rotatably inserted into another shaft hole. The corresponding rotating shaft fixedly connected to the third gear 133 is rotatably inserted into yet another shaft hole.

[0065] Of course, in other embodiments, the aforementioned shaft hole and rotating shaft can be interchanged, that is, the rotating shaft is connected to the housing and located in the mounting cavity, the first worm gear 131 or the second gear 132 is provided with a shaft hole, the second worm gear 141 or the fourth gear 142 is provided with a shaft hole, and the third gear 133 is provided with a shaft hole.

[0066] Optionally, the threads on the two worms 111 have the same direction of rotation and spacing, and the worm gear teeth of the first worm wheel 131 and the second worm wheel 141 have the same inclination angle and other structures. At the same time, the dimensions and structures of the second gear 132 and the fourth gear 142 are also the same. Therefore, when assembling the first worm wheel 131 and the second gear 132, as well as the second worm wheel 141 and the fourth gear 142, there is no need to distinguish the assembly positions, so as to improve the assembly efficiency, reduce the mold opening cost of producing the first worm wheel 131, the second gear 132, the second worm wheel 141 and the fourth gear 142, and improve production efficiency.

[0067] The inventors discovered that, in order to compress the dimensions of the entire power module 100 along the axial direction perpendicular to the motor 110 (i.e., perpendicular to the axial direction of the worm 111, i.e., the set direction), the entire power module 100 should be designed to be slender along the axial direction of the worm 111. However, the telescopic length of the connecting rope 200 has strict requirements, so the size (diameter) of the winding reel 151 cannot be designed too small. Typically, the diameter of the winding reel 151 is designed to be the same as the diameter d1 of the motor 110 (e.g.,...). Figure 3 As shown, the pitch circle diameter of the first gear 150 is set to be close to or equal to the diameter of the winding wheel 151 in order to compress the size of the entire power module 100 in a set direction. However, this setting can easily lead to interference between the first worm gear drive assembly 130 and the second worm gear drive assembly 140, which are driven by the first gear 150.

[0068] Please refer to Figure 2 and Figure 3In order to improve the above-mentioned interference problem, the power transmission mechanism 120 of this embodiment also includes a clearance-increasing gear assembly. The first worm gear transmission assembly 130 and the second worm gear transmission assembly 140 are respectively connected to the first gear 150 through a set of clearance-increasing gear assemblies. By setting the clearance-increasing gear assembly, the first worm gear transmission assembly 130 and the second worm gear transmission assembly 140 can be separated from the first gear 150, that is, the distance between the first worm gear transmission assembly 130 and the first gear 150 and the distance between the second worm gear transmission assembly 140 and the first gear 150 can be increased. This can improve the problem of interference between the first worm gear transmission assembly 130 and the winding wheel 151 (specifically, the interference between the first worm gear 131 and the winding wheel 151, or the interference between the second gear 132 and the winding wheel 151, or the interference between the third gear 133 and the winding wheel 151), and improve the problem of interference between the second worm gear transmission assembly 140 and the winding wheel 151 (specifically, the interference between the second worm gear 141 and the winding wheel 151, or the interference between the fourth gear 142 and the winding wheel 151).

[0069] Of course, in other embodiments, only the first worm gear drive assembly 130 or the second worm gear drive assembly 140 is connected to the first gear 150 via a clearance-increasing gear assembly.

[0070] It should be understood that the clearance-increasing gear assembly is not a necessary component in other embodiments, such as... Figure 6 As shown, in other embodiments, by adjusting the size of the winding wheel 151 (specifically, reducing the diameter of the winding wheel 151), the problem of interference between the winding wheel 151 and the third gear 133 and / or the fourth gear 142 can also be improved. Therefore, in such embodiments... Figure 6 In the embodiment shown, there is no need to add a clearance-increasing gear assembly, and both the third gear 133 and the fourth gear 142 mesh with the first gear 150.

[0071] The number of gears included in the clearance increasing gear assembly can be selected as needed; in this embodiment, the clearance increasing gear assembly only includes the fifth gear 161; the fifth gear 161 of the clearance increasing gear assembly that cooperates with the first worm gear transmission assembly 130 meshes with the first gear 150 and the third gear 133 simultaneously; the fifth gear 161 of the clearance increasing gear assembly that cooperates with the second worm gear transmission assembly 140 meshes with the first gear 150 and the fourth gear 142 simultaneously.

[0072] Optionally, the pitch circle diameter, diameter, number of teeth, and module of the fifth gear 161 are the same as those of the second gear 132. Of course, in other embodiments, the pitch circle diameter, diameter, number of teeth, and module of the fifth gear 161 may also be different from those of the second gear 132.

[0073] It should be noted that the fifth gear 161 is assembled into the housing in a similar manner to the third gear 133, and will not be described again here.

[0074] Of course, in other embodiments, the clearance-increasing gear assembly may also include two or three gears, etc., and is not specifically limited here; the following description takes a clearance-increasing gear assembly including two gears as an example, please refer to... Figure 7 The two gears are the sixth gear 162 and the seventh gear 163, which mesh with each other. The sixth gear 162 of the clearance-increasing gear assembly that cooperates with the first worm gear transmission assembly 130 meshes with the first gear 150, and the seventh gear 163 meshes with the third gear 133. The sixth gear 162 of the clearance-increasing gear assembly that cooperates with the second worm gear transmission assembly 140 meshes with the first gear 150, and the seventh gear 163 meshes with the fourth gear 142.

[0075] Optionally, the diameter d1 of the motor 110 is 46mm; the diameters of the winding wheel 151 and the first gear 150 are both 44.6mm. Of course, in other embodiments, the diameter of the motor 110 can be between 44-47mm, and the diameters of the winding wheel 151 and the first gear 150 can be between 45-46mm, which is not specifically limited here.

[0076] It should be understood that in other embodiments, neither the first worm gear drive assembly 130 nor the second worm gear drive assembly 140 is connected to the first gear 150 via a clearance-increasing gear assembly, wherein the third gear 133 and the fourth gear 142 are both meshed with the first gear 150.

[0077] Alternatively, please refer to Figure 3 , Figure 4 and Figure 7 The two connecting ropes 200 are pulled out from the corresponding winding reels 151 at positions on opposite sides of the axis of any one of the worm gears 111.

[0078] Of course, please refer to Figure 5 and Figure 8 In other embodiments, the two connecting ropes 200 are pulled out from the corresponding winding reels 151 at positions on the same side of the axis of either worm gear 111.

[0079] It should be understood that the power module 100 of this embodiment can also be used in other household appliances or industrial equipment that require a power mechanism, and no specific limitation is made here.

[0080] The assembly process of the power module 100 in this embodiment includes (taking the side corresponding to one of the worm gears 111 connected to the motor 110 as an example): the motor 110 connected to the worm gear 111 is assembled into the mounting cavity of the housing, and then the first worm wheel 131 or the second gear 132 and the second worm wheel 141 or the fourth gear 142 are rotatably assembled into the mounting cavity of the housing in sequence, and the third gear 133 is rotatably assembled into the mounting cavity so that the third gear 133 meshes with the second gear 132. The fifth gear 161 is rotatably assembled into the mounting cavity, and finally the winding wheel 151 with the connecting rope 200 wound around it and the first gear 150 connected to the winding wheel 151 are rotatably assembled into the mounting cavity, and one of the fifth gears 161 meshes with the first gear 150 and the third gear 133 at the same time, and the other fifth gear 161 meshes with the first gear 150 and the fourth gear 142 at the same time.

[0081] When the motor 110 drives the worm 111 to rotate around its own rotation axis, the worm 111 drives the first worm wheel 131 and the second worm wheel 141 to rotate. Correspondingly, the first worm wheel 131 drives the second gear 132 to rotate, the second gear 132 drives the third gear 133 to rotate, and the second worm wheel 141 drives the fourth gear 142 to rotate. The third gear 133 and the fourth gear 142 drive the respective meshed fifth gear 161 to rotate, so that the two fifth gears 161 drive the first gear 150 to drive the winding wheel 151 to rotate.

[0082] In summary, the power module 100 of this utility model can be used in the clothes drying rack 010. The power module 100 can improve the self-locking ability, thereby effectively improving the slippage problem, improving the problem of the connecting rope 200 automatically extending under the gravity of the clothes drying rod 300, and thus improving the problem of clothes and clothes drying rod 300 accidentally falling to the ground together when clothes are hanging on the clothes drying rod 300, so as to improve the user experience.

[0083] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A power module, characterized by The motor (110) comprises: Two worm gears (111), both of which are in driving connection with the motor (110), and both of which are located at opposite ends of the motor (110); and Two power transmission mechanisms (120), both of which are in driving connection with the worm gears (111); wherein The power transmission mechanism (120) comprises a first worm gear transmission assembly (130), a second worm gear transmission assembly (140), and a first gear (150), both of which are in driving connection with the worm gears (111), and both of which are distributed on both sides of the axis of the worm gears (111) along a set direction, the set direction being distributed at an angle with the axis of the worm gears (111); both of which are in driving connection with the first gear (150). The power transmission mechanism (120) further comprises a gap-increasing gear assembly, at least one of the first worm gear transmission assembly (130) and the second worm gear transmission assembly (140) is in driving connection with the first gear (150) through the gap-increasing gear assembly.

2. The power module of claim 1, wherein, The first worm gear transmission assembly (130) comprises a second gear (132) and a first worm gear (131), the first worm gear (131) is in meshing connection with the worm gear (111), and the first worm gear (131) is in driving connection with the first gear (150) through the second gear (132).

3. The power module of claim 1 or 2, wherein, The first worm gear transmission assembly (130) further comprises a third gear (133), the second gear (132) is coaxially connected with the first worm gear (131), and the second gear (132) is in driving connection with the first gear (150) through the third gear (133).

4. The power module of claim 3, wherein, The axes of the two worm gears (111) are coincident or parallel; along the set direction, the first worm gear transmission assemblies (130) of the two power transmission mechanisms (120) are distributed on the same side or opposite sides of the axis of any one of the worm gears (111).

5. The power module of claim 4, wherein, The modulus ratio of the second gear (132) to the first worm gear (131) is 2-3:1; and / or 6. The power module of claim 3, wherein, The tooth number ratio of the second gear (132) to the first worm gear (131) is 0.3-0.4:1; and / or The modulus of the first worm gear (131) is 0.500-0.600 mm; and / or The lead angle of the first worm gear (131) is 4.500°-4.600°. ​ 7. The power module of claim 3, wherein, The second worm gear assembly (140) comprises a second worm gear (141) and a fourth gear (142), the second worm gear (141) is engaged with the worm (111), the fourth gear (142) is coaxially connected with the second worm gear (141), and the fourth gear (142) is in driving cooperation with the first gear (150).

8. The power module of claim 7, wherein, The tooth number ratio of the first worm gear (131) to the second gear (132) is equal to the tooth number ratio of the second worm gear (141) to the fourth gear (142).

9. The power module of claim 1 or 2, wherein, The power module further comprises two winding wheels (151), two winding wheels (151) are coaxially connected with the first gear (150) of two power transmission mechanisms (120) in a one-to-one correspondence, and the winding wheel (151) is used for winding and unwinding the connecting rope (200).

10. A clothes drying machine characterised in that, The power module comprises two connecting ropes (200) and the power module of any one of claims 1-8, the power module further comprises two winding wheels (151), two winding wheels (151) are coaxially connected with the first gear (150) of two power transmission mechanisms (120) in a one-to-one correspondence, and two connecting ropes (200) are wound around two winding wheels (151) in a one-to-one correspondence; wherein the axes of the two worm gears (111) are coincident or parallelly distributed; In the set direction, the positions where two connecting ropes (200) are pulled out from the corresponding winding wheels (151) are distributed on the same side or opposite sides of the axis of any one worm gear (111).

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