Belt pulley and clothes treating apparatus

Abstract

The utility model provides a belt pulley and a clothes processing device, the belt pulley is used for being matched with a clothes processing drum of the clothes processing device, the belt pulley comprises a hub, a rim and a plurality of spokes, and the hub is provided with a shaft hole allowing a rotating shaft to be inserted; the rim is arranged on the periphery of the hub and is coaxial with the hub; the spokes are arranged between the hub and the rim, and at least the surfaces, deviating from the clothes processing drum, of the spokes are smooth surfaces in the axial direction of the belt wheel. The surface, at least deviating from the clothes processing drum, of the belt pulley is designed to be the smooth surface, friction and disturbance between the belt pulley and air during high-speed rotation can be effectively reduced, and therefore noise generated when the belt pulley cuts the air during operation is remarkably reduced.

Description

Technical Field

[0001] This application relates to the field of clothing processing technology, and in particular to a pulley and clothing processing device. Background Technology

[0002] With the development of technology and the improvement of people's living standards, clothing processing devices have become an indispensable part of family life. Clothing processing devices mainly include washing machines, dryers, and spin dryers. These devices provide users with convenient clothing cleaning and care services through different working principles.

[0003] The pulley in the clothes handling unit is a key component. The pulley is primarily used to transmit power; it is the vital link connecting the motor and the drum. Through friction with the belt, the pulley drives the washing machine drum to rotate, thus completing the washing and spin-drying of the clothes.

[0004] However, in related technologies, the structural characteristics of the pulley cause it to generate certain air disturbances when rotating at high speeds. These air disturbances can cause additional noise during the operation of the garment processing device, thereby affecting the smoothness of its operation and the user experience. Utility Model Content

[0005] This application provides a pulley designed to improve the noise problem generated during the operation of the pulley.

[0006] On one hand, this application provides a pulley for use with the garment processing cylinder of a garment processing device, the pulley comprising:

[0007] The hub has a shaft hole for inserting a rotating shaft;

[0008] A rim, disposed around the periphery of the hub and coaxially arranged with the hub; and

[0009] Multiple spokes are provided between the hub and the rim, along the axial direction of the pulley, and at least the surface of the spokes facing away from the garment processing drum is a smooth surface.

[0010] In some embodiments, the spokes have a uniform thickness at different locations to create the smooth surface; or

[0011] Along the axial direction of the pulley, the thickness of the spokes varies at different locations, but the surface intersecting the axial direction is the smooth surface.

[0012] In some embodiments, the width of the spokes is w, where w ≥ 4 mm.

[0013] In some embodiments, the plurality of spokes can be divided into multiple spoke groups, each spoke group including at least a first spoke and a second spoke, the first spoke and the second spoke being disposed between the hub and the rim;

[0014] Along the axial direction of the pulley, the surfaces of the first and second spokes facing away from the garment processing drum are smooth surfaces.

[0015] In some embodiments, within the same spoke group, the first spoke intersects at least with a second spoke of an adjacent spoke group on one side to divide the first spoke into at least two first segments, and the second spoke intersects at least with a first spoke of another adjacent spoke group on the other side to divide the second spoke into at least two second segments, the lengths of the first and second segments being less than the radial distance between the hub and the rim.

[0016] In some embodiments, the outer ends of the first spoke and the second spoke are connected to each other and to the rim, and the inner ends of the first spoke and the second spoke are both connected to the hub.

[0017] In some embodiments, multiple sets of spokes are evenly arranged circumferentially along the rim, and the pulley has an axisymmetric structure.

[0018] In some embodiments, multiple sets of spokes are arranged evenly in sequence along a first direction, the first spoke intersects with n second spokes of an adjacent set of N spokes located on one side, and the inner end of the first spoke is connected to the inner end of the second spoke of an adjacent set of (N+1) spokes located on one side.

[0019] The multiple sets of spokes are arranged evenly in sequence along the second direction. The second spokes intersect with the n first spokes of the N sets of spokes located on one side. The inner end of the second spoke is connected to the inner end of the first spoke of the (N+1)th set of spokes located on one side.

[0020] Wherein, N is an integer and satisfies: N≥1.

[0021] In some embodiments, the first spoke intersects only with the second spoke of another spoke group located adjacent to it on one side, and the second spoke intersects only with the first spoke of yet another spoke group located adjacent to it on the other side.

[0022] The first spoke includes two first sub-segments, which are a first inner sub-segment and a first outer sub-segment, respectively; the second spoke includes two second sub-segments, which are a second inner sub-segment and a second outer sub-segment, respectively.

[0023] The first outer segment, the second outer segment of the adjacent spoke group located on one side, and a portion of the rim are connected in sequence to form a first triangular space;

[0024] The first outer segment, the second outer segment of the same group, the second inner segment of the adjacent spoke group located on the other side, and the first inner segment of the adjacent spoke group located on one side are connected in sequence to jointly construct a quadrilateral space.

[0025] The first inner segment, the second inner segment of the adjacent spoke group located on one side, and a portion of the hub are connected in sequence to jointly form a second triangular space;

[0026] In a section perpendicular to the axial direction of the pulley, the cross-sectional area of ​​the second triangular space is smaller than the cross-sectional area of ​​the first triangular space and the cross-sectional area of ​​the quadrilateral space.

[0027] In some embodiments, the first outer segment, the second outer segment, and the portion of the rim that constitute the same first triangular space have a rounded transition at the connection; and / or

[0028] The first outer segment, the second outer segment, the second inner segment, and the first inner segment, which constitute the same quadrilateral space, are connected by an arc transition; and / or

[0029] The first inner segment, the second inner segment, and the portion of the hub that form the second triangular space transition with an arc at the connection point.

[0030] In some embodiments, the spokes are arranged at an angle to the radial direction of the pulley.

[0031] In some embodiments, the first and second spokes of the same group are arranged axially symmetrically about one of the radial directions of the pulley.

[0032] In some embodiments, the angle between the first spoke and the second spoke in the same group is an acute angle.

[0033] In some embodiments, both the first and second spokes are tangent to the same inscribed circle, and the center of the inscribed circle coincides with the axis of the pulley.

[0034] In some embodiments, at least one of the first spoke and the second spoke is an arc segment; or

[0035] At least one of the first spoke and the second spoke is a straight segment.

[0036] In some embodiments, the pulley further includes:

[0037] A reinforcing member is provided at the junction of the first spoke and the second spoke on the rim.

[0038] In some of these embodiments, the wheel hub includes:

[0039] Shaft seat, having the shaft hole;

[0040] A spoke, in a ring shape, is connected to the outer periphery of the axle seat and to the inner end of the wheel spoke; and

[0041] The first reinforcing rib is connected to the bearing seat and the spoke.

[0042] In some embodiments, the hub further includes:

[0043] The second reinforcing rib is connected to the other side of the spoke opposite to the first reinforcing rib; and

[0044] An annular reinforcing rib is arranged in a ring around the outer periphery of the bearing seat and is connected to the spoke plate and the second reinforcing rib.

[0045] In some of these embodiments, the rim, the hub, and the spokes are integrally formed.

[0046] On the other hand, embodiments of this application provide a garment processing device, including:

[0047] A cylinder assembly, including an outer cylinder and an inner cylinder disposed inside the outer cylinder; and

[0048] As described in any of the above embodiments, the pulley is disposed outside the outer cylinder and is connected to the inner cylinder via a rotating shaft.

[0049] The pulley in the embodiments of this application includes a hub, a rim, and multiple spokes. The hub has a central axle hole for inserting a rotating shaft to connect the pulley to the drive shaft of the garment handling device. The rim is located around the hub and is coaxial with it. Multiple spokes are located between the hub and the rim to connect them and enhance the overall structural strength of the pulley.

[0050] By designing the surface of the pulley, at least the surface facing away from the garment processing drum, as a smooth surface, friction and disturbance between the pulley and the air during high-speed rotation can be effectively reduced, thus significantly reducing the noise generated by the pulley cutting through the air during operation. Furthermore, the smooth spoke surface helps reduce air resistance, making the pulley rotation smoother, further reducing additional noise caused by vibration, improving the overall operational stability of the garment processing device, reducing noise and improving operational smoothness, providing users with a quieter and more comfortable operating environment, and meeting users' needs for low-noise operation of garment processing devices. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 This is a schematic diagram of the structure of the pulley and inner cylinder in one embodiment of this application;

[0053] Figure 2 for Figure 1 A schematic diagram of the structure of the pulley and inner cylinder from another perspective;

[0054] Figure 3 for Figure 2 Cross-sectional view along the AA' direction;

[0055] Figure 4 This is a schematic diagram of the structure of a pulley provided in one embodiment of this application;

[0056] Figure 5 for Figure 4 A schematic diagram of the pulley from another angle is shown;

[0057] Figure 6 for Figure 5 Cross-sectional view along the BB' direction;

[0058] Figure 7 for Figure 5 Cross-sectional view along the CC' direction;

[0059] Figure 8 for Figure 4 A schematic diagram of the pulley from another angle.

[0060] Explanation of reference numerals in the attached figures:

[0061] 100. Pulley; 10. Hub; 10a. Shaft hole; 11. Shaft seat; 12. Spoke; 13. First reinforcing rib; 14. Second reinforcing rib; 15. Annular reinforcing rib; 20. Flange; 3. Spoke; 30. Spoke assembly; 30a. First triangular space; 30b. Quadrilateral space; 30c. Second triangular space; 31. First spoke; 311. First sub-segment; 3111. First inner sub-segment; 3112. First outer sub-segment; 32. Second spoke; 321. Second sub-segment; 3211. Second inner sub-segment; 3212. Second outer sub-segment; 40. Reinforcing member;

[0062] 200, Inner cylinder; 300, Rotating shaft. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0064] Please see Figure 1 This embodiment provides a clothing processing device (not shown in the figure). Currently, there are many types of clothing processing devices. Functionally, clothing processing devices typically include washing machines, dryers, and spin dryers. Among them, washing machines are divided into top-loading washing machines and front-loading washing machines according to their driving method. Regardless of whether it is a top-loading or front-loading washing machine, the pulley 100 is an indispensable key component. The main function of the pulley 100 is to transmit the power of the motor to the washing machine's drum or agitator via a belt. In a top-loading washing machine, the pulley 100 usually connects the motor and the agitator, enabling the agitator to rotate and agitate the clothes; while in a front-loading washing machine, the pulley 100 transmits power to the drum, enabling the drum to rotate and wash the clothes.

[0065] The following description uses a washing machine as an example to illustrate this embodiment; other clothing processing devices can be considered similarly.

[0066] Please see Figure 1 The garment handling device includes a drum assembly and a pulley 100. The drum assembly includes an outer drum and an inner drum 200 rotatably disposed inside the outer drum. The outer drum is a container for holding detergent and water, and also supports components such as the motor, heater, and thermostat. The inner drum 200 is mainly used to hold the clothes to be washed and spun dry. The pulley 100 is located outside the outer drum and is connected to the inner drum 200 via a rotating shaft 300. Its main function is to transmit the power of the motor to the inner drum 200, driving the inner drum 200 to rotate, thereby achieving the washing and dehydration of the clothes. Specifically, the pulley 100 can be made of metal, such as iron, steel, aluminum, or aluminum alloy, or it can be made of engineering plastics.

[0067] Please refer to Figures 2-4 , the pulley 100 includes a hub 10, a rim 20 and a plurality of spokes 3. The hub 10 is the central part of the pulley 100, and the function of the hub 10 is to fix the pulley 100 so that it can be connected to an electric motor or other power source to transmit power. And the hub 10 has a shaft hole 10a for inserting a rotating shaft 300. The shaft hole 10a can be an oval hole, and the oval hole can be used in cooperation with a corresponding oval key (key bar) on the rotating shaft 300 to ensure the correct position and alignment of the rotating shaft 300 in the shaft hole 10a. The rim 20 is arranged on the periphery of the hub 10 and is coaxially arranged with the hub 10. The rim 20 is the outer ring part of the pulley 100 and can contact the belt to transmit power. And the plurality of spokes 3 are structures connecting the hub 10 and the rim 20, that is, the spokes 3 are arranged between the hub 10 and the rim 20, and the plurality of spokes 3 can support the rim 20 and enhance the strength and stability of the pulley 100.

[0068] In the related art, in order to strengthen the structural strength of the pulley with radially radiating spokes, ribs are added to the spokes, so that the cross-section of the spokes presents structures such as "H" shape, "+" shape, and "艹" shape. Since the outer plane of the spokes is uneven, these protrusions may cut the air flow during rotation, thus generating relatively large noise.

[0069] Such as Figure 2 and Figure 4 shown, in this embodiment, along the axial direction of the pulley 100, at least the surface of the spoke 3 facing away from the laundry treatment cylinder is a smooth surface. The smooth surface refers to a surface without obvious protrusion structures, unevenness or obvious textures, and has relatively small friction. The smooth surface can be a smooth plane, a smooth curved surface or a smooth arc surface. The spoke 3 having a smooth surface can effectively reduce the friction and disturbance between the pulley 100 and the air during high-speed rotation, thereby significantly reducing the noise generated by the pulley 100 cutting the air during operation. And the smooth surface of the spoke 3 helps to reduce air resistance, makes the rotation of the pulley 100 more stable, further reduces the additional noise caused by vibration, improves the overall operation stability of the laundry treatment device, reduces noise and improves operation stability, and can provide a more quiet and comfortable use environment for users, meeting the user's requirement for low-noise operation of the laundry treatment device.

[0070] It can be understood that the surface mentioned here that at least faces away from the laundry treatment cylinder means that the surface of the pulley 100 facing away from the laundry treatment cylinder is a smooth surface, and the surface facing the laundry treatment cylinder can also be a smooth surface to maximize the reduction of air resistance.

[0071] In this embodiment, the surface of the spokes 3 is smooth and has no protruding ribs or structures. Therefore, when the pulley 100 rotates at high speed, the airflow can pass through the spokes 3 more smoothly, reducing the interference and cutting effect between the airflow and the surface of the spokes 3, thereby significantly reducing airflow noise.

[0072] Specifically, in one configuration, the spokes 3 have a uniform thickness at different positions along the axial direction of the pulley 100 to create a smooth surface. That is, all spokes 3 are spokes of uniform thickness, with a uniform mass distribution, which can reduce vibration and eccentricity. In addition, spokes of uniform thickness are easier to manufacture and control in the manufacturing process because they have a consistent cross-section.

[0073] In another configuration, the thickness of the spokes 3 is inconsistent at different positions along the axial direction of the pulley 100, but the surface where the spokes 3 intersect the axial direction is a smooth surface. That is, the spokes 3 are of non-uniform thickness, but they transition smoothly along the extension direction of the spokes 3 without any abrupt protrusions. The manufacturer can optimize the mass distribution by adjusting the thickness of the spokes 3, that is, improve the structural strength of the pulley 100 while reducing the noise of the spokes 3 cutting the airflow.

[0074] To enhance the integrity and durability of the pulley 100, the rim 20, hub 10, and spokes 3 are integrally formed. The integral forming design can eliminate the seams at the connection points, improve the overall strength of the pulley 100, and the integrally formed pulley 100 is more resistant to fatigue damage caused by cyclic loads during long-term use, thus extending its service life.

[0075] Please see Figure 3 and Figure 4 In some embodiments, the width of the spokes 3 is greater than the thickness of the spokes 3 along the axial direction of the pulley 100. It should be noted that the width of the spokes 3 refers to the width value in the extending direction of the spokes 3, making the cross-section of the spokes 3 flat, i.e., multiple spokes 3 are spoke plates 12. A wider spoke 3 increases the torsional strength of the spokes 3, reduces the possibility of bending and twisting, and reduces material usage while maintaining sufficient strength, thereby reducing the overall weight of the pulley 100 and improving the dynamic performance of the pulley 100. Furthermore, the flat interface of the spokes 3 facilitates smoother airflow through the spokes 3, reducing airflow noise.

[0076] like Figures 2-4As shown, specifically, the width of the spoke 3 is w, which satisfies: w ≥ 4mm. Setting the width of the spoke 3 to w ≥ 4mm ensures sufficient structural strength and allows it to withstand greater torque and load, enabling the pulley 100 to remain stable during high-speed rotation and load changes, reducing the risk of deformation and damage. If the width of the spoke 3 is less than 4mm, its structural strength may not meet the requirements of high-speed rotation and load changes. Due to insufficient structural strength and limited load-bearing capacity, the pulley 100 may generate greater vibration and noise during operation.

[0077] In some embodiments, the spokes 3 are arranged at an angle to the radial direction of the pulley 100, that is, the spokes 3 are arranged at an angle to one radial direction of the pulley 100. The obliquely arranged spokes 3 can more evenly distribute the radial and tangential forces on the pulley 100 during operation, thereby enhancing the overall structural strength and stability of the pulley 100.

[0078] In related technologies, full-spoke wheels are heavy and require more materials because the entire wheel is covered by spokes. In contrast, the pulley 100 in this embodiment has multiple spoke groups 30, reducing its overall weight and thus the overall load on the garment handling device, reducing energy consumption during operation of the drum assembly and improving energy efficiency. Furthermore, the pulley 100 in this embodiment requires less material than a full-spoke wheel, reducing material usage and thus lowering production costs while maintaining structural strength and operational stability.

[0079] like Figure 4 As shown, specifically, the multiple spokes 3 can be divided into multiple spoke groups 30. Each spoke group 30 includes at least a first spoke 31 and a second spoke 32. In the same spoke group 30, the first spoke 31 intersects at least with the second spoke 32 of an adjacent spoke group 30 located on one side, dividing the first spoke 31 into at least two first segments 311. The second spoke 32 intersects at least with the first spoke 31 of another adjacent spoke group 30 located on the other side, dividing the second spoke 32 into at least two second segments 321. The first spokes 31 and the second spoke 32 within the same group are staggered by intersecting with other spoke groups 30. This design not only enhances the overall structural strength of the pulley 100 but also ensures stable performance during high-speed operation.

[0080] Please continue reading. Figure 4Furthermore, the first spoke 31 and the second spoke 32 are cleverly divided into shorter segments 311 and 321. The lengths of both segments 311 and 321 are less than the radial distance between the hub 10 and the rim 20. This division helps reduce airflow disturbance and noise. Compared to the continuous long spokes connecting the rim 20 and hub 10 radially along the shaft hole 10a in the prior art, which cut a large amount of air during rotation, resulting in significant airflow disturbance and noise, this embodiment reduces the effective length of the airflow cut by the first spoke 31 and the second spoke 32 per unit time by shortening the airflow cut by the first segment 311 and the second segment 321 relative to the long spokes, effectively reducing airflow disturbance and noise.

[0081] Understandably, the number of spoke groups 30 can be eight, sixteen, twenty-four, etc., and the specific number of spoke groups 30 can be set according to requirements; this application does not impose any restrictions on this. Each spoke group 30 includes at least a first spoke 31 and a second spoke 32, meaning the structure of each spoke group 30 can be diverse, and may also include a third spoke, a fourth spoke, or more spokes. It should be noted that regardless of the number of spokes in a spoke group 30, each spoke is divided into multiple segments by a spoke from another group. Although each spoke is divided into segments, they are still connected through the hub 10 and the rim 20. This structural design reduces weight while maintaining the overall strength and rigidity of the pulley 100. Furthermore, the length of each segment is less than the radial distance between the hub 10 and the rim 20. This design reduces the length of airflow cut by a single spoke per unit time, thereby reducing airflow disturbance and effectively reducing noise caused by airflow.

[0082] It should be noted that, for the sake of understanding the specific structure of the pulley 100, this embodiment will be described with a specific configuration of the spoke group 30, that is, each spoke group 30 includes only the first spoke 31 and the second spoke 32. In other embodiments, when each spoke group 30 includes more spokes, the corresponding configuration can be referred to.

[0083] Furthermore, the first spokes 31 of one group can intersect with at least one second spoke 32 of another group located on one side. That is, the first spokes 31 can intersect with one, two, three, or even more second spokes 32. When the first spokes 31 intersects with only one second spoke 32 of another group, the first spokes 31 is divided into two first segments 311. When the first spokes 31 intersects with two second spokes 32 of another group, the first spokes 31 is divided into three first segments 311, and so on. The lengths of the multiple first segments 311 can be the same or different. Importantly, even the longest first segment 311 must be less than the radial distance between the hub 10 and the rim 20. This design limits airflow disturbance during pulley 100 rotation, thereby reducing noise.

[0084] Similarly, the second spokes 32 of one group can intersect with at least one first spoke 31 of another group located on one side. That is, the second spokes 32 can intersect with one, two, three, or even more first spokes 31. When the second spokes 32 intersects only with one first spoke 31 of another group, the second spokes 32 is divided into two second sub-segments 321. When the second spokes 32 intersects with two first spokes 31 of another group, the first spokes 31 is divided into three second sub-segments 321, and so on. The lengths of the multiple second sub-segments 321 can be the same or different. Importantly, even the longest second sub-segment 321 must be less than the radial distance between the hub 10 and the rim 20.

[0085] In some embodiments, multiple sets of spoke groups 30 are arranged uniformly in sequence along a first direction. A first spoke 31 intersects with n second spokes 32 of an adjacent set of N spoke groups 30 located on one side. The inner end of the first spoke 31 is connected to the inner end of the second spoke 32 of an adjacent set of (N+1)th spoke groups 30 located on one side. Similarly, multiple sets of spoke groups 30 are arranged uniformly in sequence along a second direction. A second spoke 32 intersects with n first spokes 31 of an adjacent set of N spoke groups 30 located on one side. The inner end of the second spoke 32 is connected to the inner end of the first spoke 31 of an adjacent set of (N+1)th spoke groups 30 located on one side. Here, N is an integer and satisfies: N≥1. The staggered arrangement of the first spokes 31 and the connection of their inner ends enhances the structural rigidity of the pulley 100, reducing the possibility of deformation under high loads. Furthermore, the uniform arrangement of multiple spoke groups 30 and the connection of their inner ends help reduce vibration caused by unbalanced forces, thereby reducing noise.

[0086] Where N represents the number of sets of second spokes 32 that intersect with the first spoke 31 and the adjacent spoke group 30 located on one side, or the number of sets of first spokes 31 that intersect with the second spoke 32 and the adjacent spoke group 30 located on one side. n represents the number of second spokes 32 that intersect with the first spoke 31 and the N adjacent spoke groups 30 located on one side, or the number of first spokes 31 that intersect with the second spoke 32 and the N adjacent spoke groups 30 located on one side. N and n represent different concepts, but the quantitative relationship is the same. For example, when N=1, n is 1, indicating that the first spoke 31 intersects with one second spoke 32 in an adjacent spoke group 30; when N=4, n is 4, indicating that the second spoke 32 intersects with four first spokes 31 in four adjacent spoke groups 30.

[0087] Please see Figure 4 and Figure 5 In one configuration, the spoke group 30 comprises at least three groups, including a first spoke group, a second spoke group, and a third spoke group arranged counterclockwise along the circumference of the rim 20. The first spoke 31 is located to the left of the second spoke 32. Understandably, the first direction is counterclockwise. Here, counterclockwise refers to the side of the pulley 100 facing away from the inner cylinder 200 as the observation plane, i.e., observing the pulley from the pulley 100 towards the inner cylinder 200. When the structure moves along the circumference of the rim 20, the direction of movement is opposite to the direction of movement of the clock hands. The first spoke 31 intersects with an adjacent second spoke 32 located on one side, i.e., N=1. At this time, the inner end of the first spoke 31 of the first spoke group is connected to the inner end of the second spoke 32 of the third spoke group. The connection between the inner end of the first spoke 31 of the first spoke group and the inner end of the second spoke 32 of the third spoke group helps to distribute the load in the pulley 100, thereby improving the stability of the structure.

[0088] In another configuration, the spoke group 30 has at least five groups, including a first spoke group, a second spoke group...a ​​fifth spoke group arranged clockwise along the circumference of the rim 20. The clockwise direction is defined from the side of the pulley 100 facing away from the inner cylinder 200, i.e., observing the pulley structure from the pulley 100 towards the inner cylinder 200. When moving along the circumference of the rim 20, the direction of movement is the same as that of a clock hand. The first spoke 31 is located to the left of the second spoke 32; understandably, the second direction is clockwise. The second spoke 32 intersects with four adjacent first spokes 31 located on one side, i.e., N=4. At this time, the inner end of the second spoke 32 of the first spoke group is connected to the inner end of the first spoke 31 of the fifth spoke group. The connected inner ends of the two spokes can share the load, reducing wear on individual spokes and thus improving durability.

[0089] In this design, the outer ends of the first spoke 31 and the second spoke 32 are connected to each other and then to the rim 20, improving the overall strength and rigidity of the pulley 100, reducing noise problems caused by weak connections, and helping to maintain the shape and dimensional stability of the pulley 100 during long-term use. This further reduces noise problems caused by wear or deformation, ensuring the performance and lifespan of the pulley 100 during continuous operation. Furthermore, the inner ends of both the first spoke 31 and the second spoke 32 are connected to the hub 10, further enhancing the structural integrity of the entire pulley 100.

[0090] It should be noted that the specific number of spoke groups 30 is not directly related to the N second spokes 32 intersecting with the first spoke 31. For example, the specific number of spoke groups 30 is twenty-four, while the first spoke 31 can be configured to intersect with four or five second spokes 32, and the configuration can be optimized according to different application scenarios and load requirements. In practical applications, the number of spoke groups 30 and the intersection relationship between the first spoke 31 and the second spokes 32 can be comprehensively considered based on factors such as the size of the pulley 100, the working environment, and the expected service life to achieve optimal structural performance and durability. For example, in high-load, high-speed applications, the number of spoke groups 30 can be appropriately increased, and the intersection relationship between the first spoke 31 and the second spokes 32 can be optimized to further enhance the structural rigidity and load capacity of the pulley 100; while in light-load, low-speed applications, the number of spoke groups 30 can be appropriately reduced to simplify the structure, reduce manufacturing costs, and still meet the usage requirements. Similarly, the specific number of spoke groups 30 is not directly related to the N first spokes 31 that intersect with the second spoke 32, and will not be elaborated here.

[0091] In some embodiments, multiple sets of spokes 30 are evenly arranged along the circumference of the rim 20. Since the multiple sets of spokes 30 are evenly distributed in the circumference of the rim 20, the load carried by the pulley 100 can be more evenly distributed on the entire pulley 100, reducing local stress concentration, reducing local stress concentration and material fatigue caused by load concentration, and improving the load-bearing capacity and durability of the pulley 100.

[0092] Furthermore, the even distribution of multiple spoke groups 30 can reduce vibration caused by imbalance of the spoke groups 30, thereby reducing noise, improving the smoothness of operation, helping to make the contact between the belt and the pulley 100 more uniform, reducing uneven wear of the pulley 100, and helping to extend the service life of the pulley 100 and the belt.

[0093] In some embodiments, the pulley 100 has an axisymmetric structure, with its mass distribution and geometry symmetrical along the central axis. This symmetry enables the pulley 100 to maintain good dynamic balance when rotating at high speed, reducing vibration and sway caused by uneven mass distribution, as well as vibration and noise caused by imbalance or uneven load.

[0094] Regarding the shape of the first spoke 31 and the second spoke 32, at least one of the first spoke 31 and the second spoke 32 is an arc segment (e.g. Figure 5 Alternatively, at least one of the first spokes 31 and the second spokes 32 may be a straight segment. In one configuration, both the first spokes 31 and the second spokes 32 are straight segments. Straight segments are easy to manufacture and provide robust support, allowing the pulley 100 to remain stable under heavy loads. In another configuration, both the first spokes 31 and the second spokes 32 are curved segments. The curved segment design effectively disperses stress. At high speeds, the curved segment design improves aerodynamic characteristics, reduces airflow cutting effects and vortex formation, and enhances the smoothness and durability of the pulley 100. In yet another configuration, one of the first spokes 31 and the second spokes 32 is a straight segment, and the other is a curved segment. This allows the pulley 100 to maintain structural strength while effectively reducing noise and improving transmission efficiency.

[0095] Please see Figures 5-7 In some embodiments, the first spoke 31 is angled to the radial direction of the pulley 100, meaning that the first spoke 31 is angled to any radial direction of the pulley 100, but not to any radial direction of the pulley 100. Furthermore, the second spoke 32 is angled to both the rim 20 and the first spoke 31. This non-radial arrangement of the first and second spokes allows them to better resist the centrifugal force generated by rotation, dispersing the centrifugal force generated by the pulley 100 during rotation in multiple directions and reducing concentrated stress on the first and second spokes 31 and 32. Since the outer cylinder has multiple radial ribs on its bottom away from the inner cylinder 200, and the pulley 100 is mounted on the outer bottom of the outer cylinder, the angled arrangement of the first and second spokes 31 and 32 with the ribs on the outer cylinder helps to disperse the force transmitted from the outer cylinder to the pulley 100, reducing localized stress concentration.

[0096] Furthermore, the first spoke 31 and the second spoke 32 of the same group are arranged axially symmetrically about one of the radial directions of the pulley 100. This axially symmetrical spoke group 30 allows for a more uniform mass distribution of the pulley 100 during rotation, thereby improving rotational balance, enhancing the stability of the pulley 100's operation, and reducing vibrations caused by imbalance. The axially symmetrical design also simplifies the manufacturing process, making the dimensions and shapes of the first spoke 31 and the second spoke 32 more consistent, enhancing visual balance and harmony, and improving the aesthetics of the pulley 100.

[0097] Understandably, in other embodiments, the first spoke 31 and the second spoke 32 of the same group may also be arranged in a non-axisymmetric manner with respect to any radial direction of the pulley 100, and this application does not limit this.

[0098] Furthermore, the angle between the first spoke 31 and the second spoke 32 in the same group is an acute angle. The acute angle configuration can form a tighter structure between the first spoke 31 and the second spoke 32. That is, compared with the obtuse angle between the first spoke 31 and the second spoke 32, when the pulley 100 is the same size, the pulley 100 with the spoke group 30 set at an acute angle needs to set more spoke groups 30, and the distance between the first spoke 31 and the second spoke 32 in each group is smaller. The overall pulley 100 is tighter, which makes the pulley 100 more stable when bearing load, reduces the possibility of bending and deformation, and can improve the overall rigidity and strength of the pulley 100.

[0099] Understandably, in other embodiments, the first spoke 31 and the second spoke 32 of the same group may also be arranged at an obtuse angle or a right angle, and this application does not limit this.

[0100] In some embodiments, the first spoke 31 and the second spoke 32 are both tangent to the same inscribed circle, and the center of the inscribed circle coincides with the axis of the pulley 100. The first spoke 31 and the second spoke 32 are tangent to the same inscribed circle at different positions. Therefore, the direction of force transmission on the first spoke 31 and the second spoke 32 is perpendicular to the radius of the inscribed circle, which can minimize the force guided by the first spoke 31 and the second spoke 32 to the inscribed circle. The inscribed circle can be the hub 10 of the pulley 100. This can reduce the force guided by the first spoke 31 and the second spoke 32 to the hub 10, reduce the wear of the hub 10, and extend its service life.

[0101] In some embodiments, the first spoke 31 intersects only with the second spoke 32 of another spoke group 30 located on one side, and the second spoke 32 intersects only with the first spoke 31 of another spoke group 30 located on the other side. When the first spoke 31 is located to the left of the second spoke 32, the first spoke 31 intersects only with the second spoke 32 of another spoke group 30 to its left, and the second spoke 32 intersects only with the first spoke 31 of another spoke group 30 to its right. In this configuration, the first spoke 31 includes two first sub-segments 311, which are a first inner sub-segment 3111 and a first outer sub-segment 3112, respectively. The second spoke 32 includes two second sub-segments 321, which are a second inner sub-segment 3211 and a second outer sub-segment 3212, respectively.

[0102] Please see Figure 5 and Figure 8 The first outer segment 3112, the second outer segment 3212 of the adjacent spoke group 30 located on one side, and a portion of the rim 20 are connected in sequence to form a first triangular space 30a. The first outer segment 3112, the second outer segment 3212 of the same group, the second inner segment 3211 of the adjacent spoke group 30 located on the other side, and the first inner segment 3111 of the adjacent spoke group 30 located on one side are connected in sequence to form a quadrilateral space 30b. The first inner segment 3111, the second inner segment 3211 of the adjacent spoke group 30 located on one side, and a portion of the hub 10 are connected in sequence to form a second triangular space 30c. Understandably, the first triangular space 30a, the quadrilateral space 30b, and the second triangular space 30c are all open spaces, which can reduce the overall weight of the pulley 100, reduce the load on the clothing handling device, and improve the responsiveness and energy efficiency of the transmission system.

[0103] In the section perpendicular to the axis of the pulley 100, the cross-sectional area of ​​the second triangular space 30c is smaller than that of the first triangular space 30a and the quadrilateral space 30b. It should be noted that the smaller cross-sectional area of ​​the second triangular space 30c means that the spacing between the first inner segment 3111, the second inner segment 3211 and the part of the hub 10 that constitute the second triangular space 30c is smaller, and the number of second triangular spaces 30c arranged around the circumference of the hub 10 is greater and the density is higher. This helps to reduce the vibration of the pulley 100 near the shaft hole 10a. Reducing the vibration at the connection with the shaft 300 can further reduce the vibration transmitted to a farther distance from the pulley 100. Reducing the propagation of vibration helps to reduce the overall noise of the pulley 100, the power transmission is more stable, and the quietness of the pulley 100 during operation is improved.

[0104] Furthermore, the first outer segment 3112, the second outer segment 3212, and the portion of the rim 20 forming the same first triangular space 30a have a rounded transition at the connection; and / or the first outer segment 3112, the second outer segment 3212, the second inner segment 3211, and the first inner segment 3111 forming the same quadrilateral space 30b have a rounded transition at the connection; and / or the first inner segment 3111, the second inner segment 3211, and the portion of the hub 10 forming the second triangular space 30c have a rounded transition at the connection. Understandably, the rounded transition can more evenly distribute stress, thereby reducing stress concentration at the connection. This helps reduce the risk of fatigue cracking under cyclic loading and extends the service life of the pulley 100. It also allows for smoother airflow, reducing airflow separation and vortex formation, thereby reducing operating noise.

[0105] Please see Figures 5 to 8 In some embodiments, the pulley 100 further includes a reinforcing member 40. The reinforcing member 40 is disposed at the connection between the first spoke 31 and the second spoke 32 and the rim 20, and is provided on both sides along the rotation axis of the pulley 100. The reinforcing member 40 can improve the strength of the connection between the first spoke 31 and the second spoke 32 and the rim 20, making the pulley 100 more robust when subjected to high torque or impact loads, reducing the risk of breakage at the connection, and improving the overall load-bearing capacity of the pulley 100, allowing it to withstand greater workloads and be suitable for a wider range of applications. Furthermore, the reinforcing member 40 helps reduce the deformation of the first spoke 31, the second spoke 32, and the rim 20 under load, maintaining the shape and dimensional stability of the pulley 100, thereby ensuring the accuracy of transmission.

[0106] Please continue reading. Figures 5 to 8 In some embodiments, the hub 10 includes a bearing seat 11, spokes 12, and first reinforcing ribs 13. The bearing seat 11 is the central part of the hub 10 and has the aforementioned shaft hole 10a for mounting and fixing the rotating shaft 300. It is a key component for connecting the pulley 100 to the drive shaft. The spokes 12 are annularly connected to the outer periphery of the bearing seat 11 and connected to the inner ends of the first spokes 31 and the second spokes 32. The spokes 12 serve to connect and transmit force, acting as a bridge between the bearing seat 11 and the multiple sets of spokes 30. The first reinforcing ribs 13 are connected to the bearing seat 11 and the spokes 12. Multiple first reinforcing ribs 13 are provided and arranged radially around the circumference of the bearing seat 11 to enhance the structural strength and rigidity of the hub 10, enabling the hub 10 to withstand greater loads and torques.

[0107] Along the axial direction of the pulley 100, the thickness of the bearing seat 11 is greater than the thickness of the spokes 3. As the central part of the hub 10, the bearing seat 11 is a key component connecting the pulley 100 and the drive shaft. Increasing the thickness of the bearing seat 11 significantly improves its structural strength and rigidity, enabling it to withstand greater loads and torques. A thicker bearing seat 11 provides a more stable connection base, ensuring a tight fit between the pulley 100 and the shaft 300. Please continue reading. Figures 5 to 8 The hub 10 also includes a second reinforcing rib 14 and an annular reinforcing rib 15. It should be noted that, perpendicular to the rotation axis of the pulley 100, the pulley 100 has a side that arches towards the outer cylinder. The first reinforcing rib 13 is located on the side of the pulley 100 facing the inner cylinder, and the second reinforcing rib 14 is connected to the spoke 12 on the side opposite to the first reinforcing rib 13, i.e., on the arched side of the pulley 100. Multiple second reinforcing ribs 14 are arranged radially around the circumference of the bearing seat 11, improving the torsional resistance of the hub 10 and making it more stable when transmitting torque. The annular reinforcing rib 15 is also located on the same side as the second reinforcing rib 14, helping to enhance the structural strength of the pulley 100 facing the outer cylinder. Furthermore, the annular reinforcing rib 15 is arranged in a ring around the outer periphery of the bearing seat 11 and is connected to the spoke 12 and the second reinforcing rib 14. That is, the annular reinforcing rib 15 is located on the spoke 12 and passes through multiple second reinforcing ribs 14, providing additional circumferential support and enhancing the overall rigidity of the hub 10.

[0108] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application 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. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0109] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0110] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0111] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0112] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A pulley for cooperating with a laundry treatment drum of a laundry treatment apparatus, characterized in that, The belt pulley comprises: a hub having a shaft hole for inserting a rotating shaft; a rim arranged at the periphery of the hub and coaxially arranged with the hub; and a plurality of spokes arranged between the hub and the rim, the surface of at least the spokes away from the laundry treatment drum is a smooth surface along the axial direction of the belt pulley.

2. The pulley of claim 1, wherein The thickness of the spokes at different positions is consistent to form the smooth surface; or The thickness of the spokes at different positions is inconsistent along the axial direction of the belt pulley, but the surface intersecting with the axial direction is the smooth surface.

3. The pulley of claim 1, wherein The width of the spokes is greater than the thickness of the spokes along the axial direction of the belt pulley.

4. The pulley of claim 3, wherein The width of the spokes is w, and w satisfies: w≥4mm.

5. The pulley according to any one of claims 1 to 4, characterized in that The plurality of spokes can be divided into a plurality of spoke groups, each of the spoke groups comprises at least a first spoke and a second spoke, and the first spoke and the second spoke are arranged between the hub and the rim; The surface of the first spoke and the second spoke away from the laundry treatment drum is a smooth surface along the axial direction of the belt pulley.

6. The pulley of claim 5, wherein In the same spoke group, the first spoke intersects with at least a second spoke of an adjacent spoke group on one side to divide the first spoke into at least two first sub-segments, and the second spoke intersects with at least a first spoke of another adjacent spoke group on the other side to divide the second spoke into at least two second sub-segments, and the length of the first sub-segment and the second sub-segment is less than the radial distance between the hub and the rim.

7. The pulley of claim 6, wherein The outer end of the first spoke and the outer end of the second spoke in the same group are connected and connected with the rim, and the inner end of the first spoke and the inner end of the second spoke are connected with the hub.

8. The pulley of claim 5, wherein The plurality of spoke groups are uniformly arranged along the circumferential direction of the rim, and the belt pulley is an axisymmetric structure.

9. The pulley of claim 5, wherein The plurality of spoke groups are uniformly arranged along a first direction, the first spoke intersects with n second spokes of N adjacent spoke groups on one side, and the inner end of the first spoke is connected with the inner end of the second spoke of the (N+1)th adjacent spoke group on one side. The plurality of spoke groups are uniformly arranged along a second direction, the second spoke intersects with n first spokes of N adjacent spoke groups on one side, and the inner end of the second spoke is connected with the inner end of the first spoke of the (N+1)th adjacent spoke group on one side. The N is an integer and satisfies: N≥1.

10. The pulley of claim 6, wherein The first spoke only intersects with the second spoke of another adjacent spoke group on one side, and the second spoke only intersects with the first spoke of another adjacent spoke group on the other side. The first spoke comprises two first sub-segments, the two first sub-segments are a first inner sub-segment and a first outer sub-segment, the second spoke comprises two second sub-segments, the two second sub-segments are a second inner sub-segment and a second outer sub-segment; The first outer sub-segment, the second outer sub-segment of another adjacent spoke group on one side, and part of the rim are sequentially connected to jointly form a first triangular space. The first outer sub-section, the second outer sub-section of the same group, the second inner sub-section of the adjacent spoke group on the other side, and the first inner sub-section of the adjacent spoke group on the same side are sequentially connected to jointly form a quadrilateral space. The first inner sub-section, the second inner sub-section of the adjacent spoke group on the same side, and the part of the hub are sequentially connected to jointly form a second triangular space. In a cross section perpendicular to the axial direction of the pulley, the cross-sectional area of the second triangular space is smaller than the cross-sectional area of the first triangular space and the quadrilateral space.

11. The pulley of claim 10, wherein The first outer sub-section, the second outer sub-section, and the part of the rim that form the same first triangular space are arc transitioned at the connection; and / or The first outer sub-section, the second outer sub-section, the second inner sub-section, and the first inner sub-section that form the same quadrilateral space are arc transitioned at the connection; and / or The first inner sub-section, the second inner sub-section, and the part of the hub that form the second triangular space are arc transitioned at the connection.

12. The pulley of claim 5, wherein The spoke is arranged at an angle with the radial direction of the pulley.

13. The pulley of claim 12, wherein The first spoke and the second spoke of the same group are arranged in axial symmetry with respect to one of the radial directions of the pulley.

14. The pulley of claim 12, wherein The angle between the first spoke and the second spoke of the same group is an acute angle.

15. The pulley of claim 5, wherein The first spoke and the second spoke are both tangent to the same inscribed circle, and the center of the inscribed circle coincides with the center of the pulley.

16. The pulley of claim 5, wherein At least one of the first spoke and the second spoke is an arc segment; or At least one of the first spoke and the second spoke is a straight line segment.

17. The pulley of claim 5, wherein The pulley further comprises: A reinforcing member arranged at the connection of the first spoke and the second spoke at the rim.

18. The pulley of claim 5, wherein The hub further comprises: A shaft seat having the shaft hole; A spoke plate connected to the outer periphery of the shaft seat in a ring shape and connected to the inner end of the first spoke and the inner end of the second spoke; and A first reinforcing rib connected to the shaft seat and the spoke plate.

19. The pulley of claim 18, wherein The hub further comprises: A second reinforcing rib connected to the other side of the spoke plate away from the first reinforcing rib; and A ring-shaped reinforcing rib arranged in a ring shape at the outer periphery of the shaft seat and connected to the spoke plate and the second reinforcing rib.

20. The pulley of claim 1, wherein The rim, the hub, and the spoke are integrally formed. 21.A laundry treating apparatus, characterized by, It comprises: A cylinder assembly comprising an outer cylinder and an inner cylinder arranged inside the outer cylinder; and The pulley according to any one of claims 1-20 is arranged outside the outer cylinder and is drivingly connected to the inner cylinder through a rotating shaft. ​

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