Transmission mechanism and washing machine

Abstract

The invention relates to a transmission mechanism and a washing machine, and belongs to the technical field of washing machines, the transmission mechanism comprises a rotatable transmission shaft, a support surrounds the transmission shaft in the circumferential direction of the transmission shaft, the support is configured to be fixed relative to the transmission shaft, and the support is connected with the transmission shaft and can drive the transmission shaft to rotate; the transmission part is rotatably arranged on the support, the driving end of the motor is configured to drive the transmission part to rotate, the inner ring face of the support and the driving end of the motor are engaged with the transmission part, and the transmission part is configured to rotate around the driving end in the circumferential direction of the driving end in the rotating process. The transmission part can drive the support to rotate in the rotating process so as to drive the transmission shaft to rotate through the support, and therefore under the condition that the transmission shaft rotates at a low speed in the washing process, the rotating speed of the driving end of the motor can be relatively increased through the matched design of the planetary gear train, the energy efficiency utilization rate of the motor is increased, and the overall energy efficiency value of the washing machine is increased.

Description

Technical Field

[0001] This application relates to the field of washing machine technology, and in particular to a transmission mechanism and a washing machine. Background Technology

[0002] The drum in a washing machine is driven to rotate by a motor. The drum rotates at low speed during the washing process and at high speed during the spin-drying process. During the low-speed washing process, the energy efficiency of the motor is low, and the washing process accounts for a large proportion of the drum's usage time, resulting in a low overall energy efficiency of the washing machine. Summary of the Invention

[0003] In view of this, this application provides a transmission mechanism and a washing machine that can improve the energy efficiency of the motor during the washing process.

[0004] In a first aspect, this application provides a transmission mechanism, comprising: a transmission shaft configured to be rotatable; a support, annular in shape and having an inner annular surface, the support surrounding the transmission shaft in the circumferential direction and configured to be fixed relative to the transmission shaft; a bracket connected to the transmission shaft and capable of driving the transmission shaft to rotate; a transmission member rotatably mounted on the bracket; and a motor including a drive end configured to drive the transmission member to rotate; wherein the drive end and the inner annular surface respectively mesh with the transmission member, and the transmission member is configured to rotate around the drive end in the circumferential direction during rotation, and drive the bracket to rotate, thereby driving the transmission shaft to rotate via the bracket.

[0005] Optionally, the bracket includes a body, which is sleeved on the drive shaft; the transmission component includes connected teeth and a shaft, with the drive end and inner ring surface respectively meshing with the teeth, and the shaft rotatably inserted into the body.

[0006] Optionally, the bracket may also include a support portion surrounding the body, with a shaft portion rotatably inserted into the support portion.

[0007] Optionally, the bracket also includes a limiting part, which surrounds the body and is connected to the support part; the limiting part has an opening for the teeth to protrude from the limiting part; the driving end extends into the inner side of the limiting part and meshes with the teeth, and the inner ring surface meshes with the part of the teeth that protrudes from the opening.

[0008] Optionally, the limiting part includes a first limiting part and a second limiting part; the first limiting part and the second limiting part are respectively connected to the support part, the second limiting part is located inside the first limiting part, the first limiting part has a first opening on which the tooth part is exposed, and the second limiting part has a second opening on which the tooth part is exposed; the driving end extends into the inside of the second limiting part and meshes with the portion of the tooth part exposed in the second opening; the inner ring surface meshes with the portion of the tooth part exposed in the first opening.

[0009] Optionally, the bracket also includes a cover plate surrounding the drive end in the circumferential direction; the cover plate covers the end of the limiting part opposite to the support part; the end of the toothed part opposite to the support part is provided with a shaft part, which is rotatably inserted into the cover plate.

[0010] Optionally, a first tooth surface is provided on the inner ring surface, and the number of teeth on the first tooth surface is Z2; a second tooth surface is provided on the side wall of the drive end, and the number of teeth on the second tooth surface is Z1; the first tooth surface and the second tooth surface respectively mesh with the tooth part; and satisfy: 2.5≤(1+Z2) / Z1≤5.

[0011] Optionally, the support includes a gear ring, which is inscribed in the inner annular surface, and the tooth surface of the gear ring forms the first tooth surface.

[0012] Optionally, the transmission mechanism also includes a drive wheel, which is sleeved on the drive end and drives the drive wheel to rotate; the second tooth surface is provided on the side wall of the drive wheel.

[0013] Optionally, the support includes a main body in the shape of a ring. The main body includes a first segment and a second segment connected together. The inner diameter of the first segment is smaller than the inner diameter of the second segment. A first tooth surface is disposed on the inner ring surface of the second segment. A bracket is disposed on the inner side of the second segment. A drive end extends into the inner side of the second segment.

[0014] Optionally, the support also includes a connecting bearing; the connecting bearing is disposed in the first section, the outer ring of the connecting bearing is in contact with the inner ring surface located in the first section, and the inner ring of the connecting bearing is sleeved on the drive shaft, so that the drive shaft can rotate relative to the support.

[0015] Secondly, embodiments of this application provide a washing machine, including: a first drum and a second drum, the washing capacity of the first drum being greater than the washing capacity of the second drum, the second drum including an outer drum and an inner drum coaxially disposed inside the outer drum; and a transmission mechanism as described in the first aspect, the transmission shaft being connected to the inner drum to drive the inner drum to rotate; and a support being mounted on the outer drum.

[0016] This application provides a transmission mechanism and a washing machine including the transmission mechanism. The transmission mechanism includes a rotatable transmission shaft, a support surrounding the transmission shaft along its circumferential direction, the support being fixed relative to the transmission shaft, a bracket connected to the transmission shaft and capable of driving the transmission shaft to rotate, a transmission component rotatably mounted on the bracket, a motor drive end configured to drive the transmission component to rotate, and engaging the inner annular surface of the support and the motor drive end with the transmission component respectively. The transmission component is configured to rotate around the drive end along its circumferential direction during rotation, and the transmission component can drive the bracket to rotate during rotation, thereby driving the transmission shaft to rotate through the bracket, thus enabling the transmission shaft, support, bracket, and transmission component to rotate. The system consists of a planetary gear train formed by the drive end, a planetary gear shaft, a gear ring formed by the inner ring surface of the support, a planet carrier formed by the bracket, planetary gears formed by the transmission components, and a sun gear formed by the drive end. The rotation of the transmission components creates their own rotation, and their revolution around the drive end along its circumferential direction creates its own revolution. During the rotation and revolution, the transmission components drive the bracket to rotate, and the bracket drives the drive shaft to rotate, making the rotation speeds of the drive shaft and the bracket the same. Thus, the revolution speed of the transmission components is the rotation speed of the drive shaft. During the washing process, when the drive shaft rotates at low speed, the rotation speed of the drive end of the motor can be relatively increased through the design of the planetary gear train, thereby improving the energy efficiency of the motor and the overall energy efficiency of the washing machine. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the combined structure of the transmission mechanism and the second drum in the washing machine provided in the embodiments of this application;

[0018] Figure 2 for Figure 1 Sectional view along axis AA;

[0019] Figure 3 for Figure 1 Exploded view;

[0020] Figure 4 for Figure 3 BB-direction sectional view;

[0021] Figure 5 A cross-sectional view of the transmission mechanism provided in an embodiment of this application;

[0022] Figure 6 This is a cross-sectional view of some components in the transmission mechanism provided in the embodiments of this application;

[0023] Figure 7 A cross-sectional view of the transmission shaft, support, first connecting bearing, and second bearing in a transmission mechanism provided in an embodiment of this application;

[0024] Figure 8 This is a schematic diagram of the combined structure of the transmission component and the motor in the transmission mechanism provided in the embodiments of this application;

[0025] Figure 9 This is a schematic diagram of the combined structure of the support, bracket, and transmission component in the transmission mechanism provided in the embodiments of this application.

[0026] Figure 10 This is a schematic diagram of the combined structure of the support, bracket, transmission component and motor in the transmission mechanism provided in the embodiments of this application;

[0027] Figure 11 This is a schematic diagram of the first angle of the support in the transmission mechanism provided in the embodiment of this application;

[0028] Figure 12 This is a schematic diagram of the second angle of the bracket in the transmission mechanism provided in the embodiment of this application;

[0029] Figure 13 for Figure 12 CC-direction sectional view;

[0030] Figure 14 This is a schematic diagram of the transmission component in the transmission mechanism provided in the embodiments of this application;

[0031] Figure 15 for Figure 14 DD section view;

[0032] Figure 16 This is a schematic diagram of the structure of a washing machine provided in an embodiment of this application;

[0033] Figure 17 for Figure 16 The back view.

[0034] Explanation of reference numerals in the attached figures

[0035] 100. Transmission mechanism;

[0036] 10. Drive shaft; 11. Input end; 12. Output end; 13. Locking component;

[0037] 20. Support; 21. Inner annular surface; 211. First tooth surface; 22. Main body; 221. First section; 2211. Receiving groove; 222. Second section; 223. Connecting part; 23. Connecting bearing; 231. First connecting bearing; 232. Second connecting bearing; 24. Fixed bearing; 25. Fixed snap ring; 26. Fixed cover;

[0038] 30. Bracket; 31. Body; 32. Support part; 320. Insertion hole; 33. Limiting part; 330. Opening; 3301. First opening; 3302. Second opening; 331. First limiting part; 332. Second limiting part; 34. Cover plate; 340. Limiting groove;

[0039] 40. Transmission components; 41. Gear; 42. Shaft;

[0040] 50. Motor; 51. Drive end; 511. Second tooth surface; 512. First surrounding part; 513. Second surrounding part; 52. Drive wheel;

[0041] 60. Top support component; 61. Sleeve connection part; 62. Top support part;

[0042] 200. Washing machine; 210. First drum; 220. Second drum; 221. Outer drum; 222. Inner drum;

[0043] X, the first direction. Detailed Implementation

[0044] To make the technical solution and beneficial effects of this application more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0045] In this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In other words, they should not be construed as limitations on this application.

[0046] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first" or "second" may explicitly include at least one of those features. In this application, "multiple" means at least two, such as two, three, etc.; "several" means at least one, such as one, two, three, etc., unless otherwise explicitly specified.

[0047] In this application, unless otherwise expressly defined, the terms "installation," "connection," "linking," "fixing," "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] In this application, unless otherwise expressly defined, the terms "above," "on top of," "over," "above," "below," "below," "below," or "below" for "first feature over second feature" can refer to the first and second features being in direct contact, or to the first and second features being in indirect contact through an intermediate medium. Furthermore, "above," "over," and "below" for "first feature over second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature over second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0049] In some embodiments of this application, a transmission mechanism 100 is provided, as shown in the reference... Figures 2-4 The transmission mechanism 100 includes: a transmission shaft 10, a support 20, a bracket 30, a transmission component 40, and a motor 50.

[0050] The drive shaft 10 extends along a first direction X, which is parallel to the axial direction of the drive shaft 10. The drive shaft 10 is configured to be rotatable, specifically, referring to... Figure 4 The drive shaft 10 includes an input end 11 and an output end 12 disposed opposite to each other along a first direction X. The output end 12 is configured to be connected to the drum of the washing machine to drive the drum of the washing machine to rotate, so that the drum can perform washing or spin-drying functions.

[0051] The support 20 is ring-shaped, as shown in the reference. Figure 3 and Figure 4 The support 20 has an inner annular surface 21. The support 20 surrounds the drive shaft 10 in the circumferential direction. The support 20 is configured to be fixed relative to the drive shaft 10. Specifically, the input end 11 of the drive shaft 10 is inserted into the support 20. During the rotation of the drive shaft 10, the support 20 remains fixed relative to the drive shaft 10.

[0052] The bracket 30 is connected to the drive shaft 10 and can drive the drive shaft 10 to rotate. Specifically, the bracket 30 is located inside the support 20, and the inner annular surface 21 of the support 20 surrounds the bracket 30 along its circumferential direction. The transmission member 40 is rotatably mounted on the bracket 30. Specifically, the transmission member 40 extends along a first direction X, and one end of the transmission member 40 along the first direction X is rotatably connected to the bracket 30. The drive end 51 of the motor 50 is configured to drive the transmission member 40 to rotate. Specifically, the motor 50 is located on the side of the bracket 30 opposite to the output end 12.

[0053] The inner annular surface 21 of the drive end 51 and the support 20 respectively meshes with the transmission component 40. The transmission component 40 is configured to rotate around the drive end 51 in the circumferential direction during rotation, and drive the bracket 30 to rotate, so as to drive the transmission shaft 10 to rotate through the bracket 30.

[0054] The drum in a washing machine is driven to rotate by a motor. The drum rotates at low speed during the washing process and at high speed during the spin-drying process. The motor drives the drum to rotate through a drive shaft. The transmission ratio between the motor and the drive shaft is 1:1, meaning that the motor speed and the drive shaft speed are the same. During the low-speed washing process, the drum rotates at a slower speed, and correspondingly, the drive shaft rotates at a slower speed, resulting in a slower motor speed. This leads to low energy efficiency of the motor. Moreover, the washing process accounts for a large proportion of the drum's usage time, resulting in low overall energy efficiency of the washing machine.

[0055] The transmission mechanism 100 provided in this embodiment includes a rotatable transmission shaft 10, a support 20 surrounding the transmission shaft 10 in the circumferential direction, the support 20 being fixed relative to the transmission shaft 10, a bracket 30 connected to the transmission shaft 10 and capable of driving the transmission shaft 10 to rotate, a transmission member 40 rotatably mounted on the bracket 30, a drive end 51 of a motor 50 configured to drive the transmission member 40 to rotate, and engaging the inner annular surface 21 of the support 20 and the drive end 51 of the motor 50 with the transmission member 40 respectively. The transmission member 40 is configured to rotate around the drive end 51 in the circumferential direction during rotation, and the transmission member 40 can drive the bracket 30 to rotate during rotation, thereby driving the transmission shaft 10 to rotate via the bracket 30, thus enabling the transmission shaft 10, support 20, bracket 30, and transmission member 40 to rotate. The drive shaft 10 and the drive end 51 cooperate to form a planetary gear system. The drive shaft 10 forms a planetary gear rod, the inner ring surface 21 of the support 20 forms a gear ring, the bracket 30 forms a planet carrier, the transmission component 40 forms planetary gears, and the drive end 51 forms a sun gear. The transmission component 40 rotates to form its own rotation, and the transmission component 40 revolves around the drive end 51 in the circumferential direction. During its own rotation and revolution, the transmission component 40 drives the bracket 30 to rotate, and the bracket 30 drives the drive shaft 10 to rotate, so that the speed of the drive shaft 10 and the bracket 30 are the same. Thus, the speed of the revolution of the transmission component 40 is the speed of the drive shaft 10. When the drive shaft 10 rotates at low speed during the washing process, the speed of the drive end 51 of the motor 50 can be relatively increased through the cooperation design of the planetary gear system, thereby improving the energy efficiency of the motor 50 and improving the overall energy efficiency of the washing machine.

[0056] During the rotation of the drive end 51 of the motor 50, the transmission component 40 is driven to rotate. Since the inner ring surface 21 of the support 20 and the drive end 51 of the motor 50 are respectively engaged with the transmission component 40, and the support 20 is fixed relative to the transmission shaft 10, the transmission component 40 rotates around the drive end 51 in the circumferential direction during its rotation, forming a revolution. The transmission component 40 also rotates around the drive end 51 in the circumferential direction of the inner ring surface 21. The drive end 51 and the inner ring surface 21 cooperate to clamp the transmission component 40, ensuring the rotational stability of the transmission component 40. During the revolution and rotation, the transmission component 40 drives the bracket 30 to rotate, and the bracket 30 drives the transmission shaft 10 to rotate, so that the revolution speed of the transmission component 40 is the rotational speed of the transmission shaft 10.

[0057] Because the drum speed of the washing machine is relatively low during the washing process, the speed of the drive shaft 10 is also relatively low. However, through the structural design of the planetary gear system in the transmission mechanism 100 provided in this application embodiment, the drive end 51 of the motor 50 can maintain a relatively high speed. As a result, during the subsequent spin-drying process, the drive end 51 of the motor 50 maintains a relatively high speed, which allows the speed of the motor 50 to be increased to meet the spin-drying requirements in a short time, further improving the energy efficiency of the motor 50 and thus improving the overall energy efficiency of the washing machine.

[0058] In addition, the transmission mechanism 100 provided in this application embodiment increases the rotational speed of the drive end 51 of the motor 50. Since the motor 50 is circular with a large radius R and a large mass M, combined with the angular momentum formula: J=1 / 2MR²ω, increasing the rotational speed ω of the motor 50 will significantly increase the overall angular momentum of the transmission mechanism 100. Due to the law of conservation of angular momentum, the stability of the washing machine during the spin-drying process will also be greatly improved, which can significantly reduce the shaking of the washing machine body during spin-drying, thereby reducing spin-drying noise, increasing spin-drying speed and reducing the moisture content of clothes.

[0059] Among them, motor 50 is a DD direct drive motor (i.e., DD motor, Direct Drive Motor, also known as a direct drive motor) or a brushless DC motor (BLDC for short), and the drive end 51 is a part of the rotor structure of motor 50.

[0060] In some embodiments, refer to Figures 4-5 The bracket 30 includes a body 31, which is sleeved on the drive shaft 10. Specifically, the body 31 is sleeved on the input end 11 of the drive shaft 10. (See reference...) Figures 5-6 The transmission component 40 includes a connected toothed portion 41 and a shaft portion 42. The driving end 51 and the inner ring surface 21 respectively mesh with the toothed portion 41. The shaft portion 42 is rotatably inserted into the body 31. Specifically, the shaft portion 42 is rotatably inserted into the end face of the body 31 facing the motor 50 along the first direction X. The driving end 51 and the inner ring surface 21 respectively mesh with the toothed portion 41. Combined with the structural design that the shaft portion 42 is rotatably inserted into the body 31, the toothed portion 41 can drive the body 31 of the support 30 to rotate through the shaft portion 42 during its rotation and revolution around the driving end 51 in the circumferential direction. This ensures the stability of the transmission component 40 driving the support 30 to rotate during the revolution and ensures the stability of the body 30 driving the transmission shaft 10 to rotate.

[0061] In some embodiments, refer to Figure 5 as well as Figures 11-13The bracket 30 also includes a support portion 32, which is arranged around the body 31 in the circumferential direction. Specifically, the support portion 32 is ring-shaped and sleeved on the body 31. The shaft portion 42 is rotatably inserted into the support portion 32, so that the transmission member 40 drives the bracket 30 to rotate during the revolution through the connection between the shaft portion 42 and the support portion 32, ensuring the stability of the transmission member 40 driving the bracket 30 to rotate during the revolution, and ensuring the stability of the body 30 driving the transmission shaft 10 to rotate.

[0062] In some embodiments, refer to Figure 5 as well as Figures 11-13 The bracket 30 also includes a limiting part 33, which surrounds the body 31 and is connected to the support part 32. Specifically, the limiting part 33 is annular in shape, surrounds the body 31 in the circumferential direction, and protrudes along the first direction X on the side of the support part 32 facing the motor 50. Figures 11-13 The limiting part 33 has an opening 330 on which the toothed part 41 protrudes, as shown in the figure. Figure 5 The driving end 51 extends into the inner side of the limiting part 33 and engages with the teeth 41. The inner ring surface 21 engages with the portion of the teeth 41 that protrudes from the opening 330. The limiting part 33, in conjunction with the body 31, limits the movement of the transmission component 40, ensuring the stability of the transmission component 40 on the bracket 30. The opening 330 ensures that the teeth 41 of the transmission component 40 can simultaneously engage with both the driving end 51 and the inner ring surface 21, and avoids interference from the limiting part 33 on the rotation of the teeth 41, ensuring the rotational stability of the teeth 41 in both its rotation and revolution.

[0063] In some embodiments, refer to Figure 5 as well as Figures 11-13 The limiting part 33 includes a first limiting part 331 and a second limiting part 332. The first limiting part 331 and the second limiting part 332 are respectively connected to the supporting part 32. The second limiting part 332 is located inside the first limiting part 331. (Refer to...) Figures 11-13The first limiting part 331 has a first opening 3301 on which the toothed part 41 protrudes, and the second limiting part 332 has a second opening 3302 on which the toothed part 41 protrudes. The driving end 51 extends into the inner side of the second limiting part 332 and meshes with the portion of the toothed part 41 protruding from the second opening 3302. The inner ring surface 21 also meshes with the portion of the toothed part 41 protruding from the first opening 3301. The cooperation between the first limiting part 331 and the second limiting part 332 can limit the transmission member 40, further improving the installation stability between the transmission member 40 and the bracket 30. The opening of the first opening 3301 ensures the meshing stability between the toothed part 41 and the inner ring surface 21, avoiding interference from the first limiting part 331 to the rotation of the toothed part 41. The opening of the second opening 3302 ensures the meshing stability between the toothed part 41 and the driving end 51, avoiding interference from the second limiting part 332 to the rotation of the toothed part 41.

[0064] In some embodiments, refer to Figure 11 The support part 32 is provided with an insertion hole 320. Specifically, the support part 32 located between the first limiting part 331 and the second limiting part 332 is provided with an insertion hole 320. The shaft part 42 of the transmission member 40 is inserted into the insertion hole 320 to ensure the connection stability between the transmission member 40 and the bracket 30.

[0065] In some embodiments, refer to Figure 5 as well as Figures 14-15 The toothed portion 41 and the shaft portion 42 are integrally formed, and the shaft portion 41 protrudes from at least one end face of the shaft portion 42 along the first direction X. In some other implementations, the shaft portion 42 is rod-shaped, and the toothed portion 41 is sleeved on the shaft portion 42. The embodiments of this application do not specifically limit the connection relationship between the toothed portion 41 and the shaft portion 42.

[0066] In some embodiments, refer to Figure 14 The teeth 41 are inclined to form a helical gear.

[0067] In some embodiments, refer to Figures 3-5The bracket 30 also includes a cover plate 34, which surrounds the drive end 51 in the circumferential direction. The cover plate 34 covers the end of the limiting part 33 opposite to the support part 32. The end of the toothed part 41 opposite to the support part 32 is provided with a shaft part 42, which is rotatably inserted into the cover plate 34. Specifically, the cover plate 34 is fixed relative to the body 31. The toothed part 41 has shaft parts 42 protruding from opposite ends in the first direction X. One end of the shaft part 42 is rotatably inserted into the support part 32, and the other end of the shaft part 42 is rotatably inserted into the cover plate 34 and is configured to be movable relative to the cover plate 34. The cooperation design between the cover plate 34 and the limiting part 33 improves the assembly stability between the transmission component 40 and the bracket 30, ensures the rotational stability of the transmission component 40 in its rotation and revolution, and thus ensures the transmission stability between the drive end 51 and the transmission shaft 10.

[0068] In some embodiments, refer to Figure 4 and Figure 5 The cover plate 34 has a limiting groove 340 on the side facing the limiting part 33 along the first direction X. The limiting groove 340 surrounds the driving end 51 along the circumferential direction of the driving end 51. The shaft part 42, which protrudes from the tooth part 41 and is opposite to the end of the support part 32, is rotatably inserted into the limiting groove 340 and is configured to move in the limiting groove 340. During the revolution of the transmission member 40, the shaft part 42 moves along the limiting groove 340 to guide and limit the revolution of the transmission member 40, ensuring the rotational stability of the revolution of the transmission member 40 and preventing the transmission member 40 from deviating during the revolution.

[0069] In some embodiments, refer to Figures 3-4 as well as Figure 7 The inner ring surface 21 is provided with a first tooth surface 211, and the number of teeth on the first tooth surface 211 is Z2, as shown in the figure. Figure 8 and Figure 10 A second tooth surface 511 is provided on the side wall of the drive end 51, and the number of teeth on the second tooth surface 511 is Z1, as shown in the figure. Figure 10 The first tooth surface 211 and the second tooth surface 511 mesh with the tooth 41 respectively; and satisfy: 2.5≤(1+Z2) / Z1≤5. Wherein, (1+Z2) / Z1 represents the transmission ratio. When the transmission ratio is in the range of 2.5~5, the speed of the drive end 51 of the motor 50 can be significantly improved. For example, if the ratio of (1+Z2) / Z1 is 2.67, and the speed of the transmission shaft 10 is 50r / min, the speed of the drive end 51 of the motor 50 can reach 133r / min, thereby significantly improving the speed of the motor 50, improving the working efficiency of the motor 50, and increasing the angular momentum of the transmission mechanism 100, thereby improving the spin-drying stability of the washing machine, and significantly reducing the shaking of the washing machine body during spin-drying, thereby reducing spin-drying noise, increasing the spin-drying speed and reducing the moisture content of the clothes.

[0070] In addition, a first tooth surface 211 is provided on the inner ring surface 21, that is, a first tooth surface 211 is formed on the inner ring surface 21. The first tooth surface 211 is annular in shape and extends along the circumferential direction of the inner ring surface 21. The structural design of directly forming the first tooth surface 211 on the inner ring surface 21 can reduce the processing and manufacturing cost of the support 20.

[0071] In some embodiments, the support 20 includes a gear ring (not shown) that is internally connected to the inner annular surface 21, and the tooth surface of the gear ring forms a first tooth surface 211. The structural design of the gear ring being internally connected to the inner annular surface 21 facilitates the replacement and maintenance of the gear ring and reduces maintenance costs.

[0072] In some embodiments, refer to Figures 5-6 as well as Figure 8 and Figure 10 The transmission mechanism 100 also includes a drive wheel 52, which is sleeved on the drive end 51. The drive end 51 drives the drive wheel 52 to rotate, and the second tooth surface 511 is provided on the side wall of the drive wheel 52. The drive wheel 52 allows the drive end 51 to mesh with the transmission component 40 through the drive wheel 52 to drive the transmission component 40 to rotate, thereby improving the connection stability between the drive end 51 and the transmission component 41. Compared with the structure of directly forming the second tooth surface 511 on the side wall of the drive end 51, the drive wheel 52 can reduce the processing cost.

[0073] In some embodiments, refer to Figure 4 as well as Figures 6-7 The support 20 includes a main body 22, which is annular in shape. The main body 22 includes a first segment 221 and a second segment 222 connected together. Specifically, the first segment 221 and the second segment 222 are connected along a first direction X. The inner diameter of the first segment 221 is smaller than the inner diameter of the second segment 222. A first tooth surface 211 is disposed on the inner annular surface 21 of the second segment 222. A bracket 30 is disposed inside the second segment 222, and a drive end 51 extends into the inner side of the second segment 222. The two-segment structure of the main body 22 allows the first segment 221 to position the transmission shaft 10, and the second segment 222 to cooperate with the bracket 30, the transmission component 40, and the drive end 51 of the motor 50. This ensures the rotational stability of the transmission component 40 during its rotation and revolution, thereby ensuring the transmission ratio between the first tooth surface 211 and the second tooth surface 511, and guaranteeing the speed increase effect of the motor 50.

[0074] In some embodiments, refer to Figure 3 , Figure 5 and Figure 7 The support 20 also includes a connecting bearing 23, which is disposed in the first section 221. The outer ring of the connecting bearing 23 is connected to the inner ring surface of the first section 221, and the inner ring of the connecting bearing 23 is sleeved on the drive shaft 10, so that the drive shaft 10 can rotate relative to the support 20.

[0075] In some embodiments, refer to Figure 3 , Figure 5 and Figure 7 The connecting bearing 23 includes a first connecting bearing 231 and a second connecting bearing 232 spaced apart along the first direction X. The first connecting bearing 231 is adjacent to the second segment 222. The outer diameter of the outer ring of the first connecting bearing 231 is larger than the outer diameter of the outer ring of the second connecting bearing 232. The outer rings of the first connecting bearing 231 and the second connecting bearing 232 are respectively inlaid in the inner ring surface 21 located in the first segment 221. The inner rings of the first connecting bearing 231 and the second connecting bearing 232 are respectively rotatably sleeved on the drive shaft 10. The matching design of the first connecting bearing 231 and the second connecting bearing 232 can improve the installation stability of the drive shaft 10 in the support 20, thereby ensuring the rotational stability of the drive shaft 10.

[0076] In some embodiments, refer to Figure 6 A receiving groove 2211 is provided on the inner annular surface 21 of the first segment 221. There are two receiving grooves 2211, which are spaced apart along the first direction X. The first connecting bearing 231 is embedded in one receiving groove 2211, and the second connecting bearing 232 is embedded in the other receiving groove 2211. The opening of the receiving groove 2211 can improve the installation stability of the first connecting bearing 231 and the second connecting bearing 232 in the first segment 221, thereby ensuring the installation stability of the drive shaft 10 in the support 20.

[0077] In some embodiments, refer to Figure 3 , Figures 5-7 A connecting part 223 is provided on the side wall of the main body 22. The connecting part 223 is annular in shape and protrudes from the side wall of the main body 22. The main body 22 is fixedly installed on the outer drum of the washing machine drum through the connecting part 223, thereby ensuring that the support 20 is fixed relative to the transmission shaft 10 and ensuring the transmission ratio.

[0078] In some embodiments, refer to Figure 5 The input end 11 of the drive shaft 10 is fitted with a locking member 13, and the drive end 51 has a groove at one end facing the drive shaft 10 along the first direction X, and the input end 11 is rotatably inserted into the groove.

[0079] In some embodiments, refer to Figure 5 The motor 50 also includes a first surrounding portion 512 that surrounds the drive end 51 in the circumferential direction. The first surrounding portion 512 rotates synchronously with the drive end 51. The support 20 also includes a fixed bearing 24. The inner ring of the fixed bearing 24 is fitted onto the outer wall of the second section 222 of the main body 22, and the outer ring of the fixed bearing 24 is connected to the first surrounding portion 512 to ensure the rotational stability of the drive end 51 of the motor 50. The first surrounding portion 512 is a part of the rotor structure of the motor 50.

[0080] In some embodiments, refer to Figure 5 The support 20 also includes a retaining snap ring 25, which is connected to the inner ring of the retaining bearing 24 to fix the inner ring and prevent the inner ring of the retaining bearing 24 from detaching from the second section 222 of the main body 22.

[0081] In some embodiments, refer to Figure 5 The support 20 also includes a fixing cover 26 for fixing the first circumferential portion 512 to the outer ring of the fixing bearing 24 to prevent the drive end 51 of the motor 50 from disengaging from the fixing bearing 24 and to ensure the rotational stability of the drive end 51.

[0082] In some embodiments, refer to Figure 5 The motor 50 also includes a second surrounding portion 513 that surrounds the first surrounding portion 512 in the circumferential direction, and the drive end 51, the first surrounding portion 512, and the second surrounding portion 513 rotate synchronously. (See reference...) Figure 3 and Figure 5 The transmission mechanism 100 also includes a top support member 60, which includes a sleeve portion 61 and a top support portion 62. The sleeve portion 61 is fitted onto the outer wall of the second section 222 of the main body 22 of the support 20. The top support portion 62 surrounds the sleeve portion 61 along the circumferential direction and connects to the sleeve portion 61. The top support portion 62 abuts against the second surrounding portion 513 to ensure the rotational stability of the drive end 51 of the motor 50. The drive end 51, the first surrounding portion 512, and the second surrounding portion 513 are all part of the rotor structure of the motor 50.

[0083] In some embodiments of this application, a washing machine 200 is also provided, see reference. Figure 16 The washing machine 200 includes a first drum 210 and a second drum 220. The washing capacity of the first drum 210 is greater than that of the second drum 220. (Refer to...) Figure 2 The second roller 220 includes an outer cylinder 221 and an inner cylinder 222 coaxially disposed inside the outer cylinder 221; and a transmission mechanism 100 as described above, wherein the transmission shaft 10 is connected to the inner cylinder 222 to drive the inner cylinder 222 to rotate; and a support 20 is mounted on the outer cylinder 221. Specifically, the support 20 is detachably mounted on the outer cylinder 221 via a connecting part 223.

[0084] During use, the transmission mechanism 100 drives the inner drum 222 to rotate via the transmission shaft 10, thereby washing or dehydrating the clothes placed in the inner drum 222. Because the rotational speed of the inner drum 222 of the second drum 220 is relatively low during the washing process, the rotational speed of the transmission shaft 10 is also relatively low. However, through the planetary gear system structure design in the transmission mechanism 100 provided in this embodiment, the drive end 51 of the motor 50 can maintain a relatively high rotational speed. Therefore, during the subsequent dehydration process, because the drive end 51 of the motor 50 maintains a relatively high rotational speed, the rotational speed of the motor 50 can be increased to the required speed for dehydration in a short time, further improving the energy efficiency of the motor 50 and thus improving the overall energy efficiency of the washing machine.

[0085] Furthermore, through the transmission mechanism 100 provided in this application embodiment, the rotational speed of the drive end 51 of the motor 50 is increased. Since the motor 50 is circular with a large radius R and a large mass M, combined with the angular momentum formula: J=1 / 2MR²ω, increasing the rotational speed ω of the motor 50 will significantly increase the overall angular momentum of the transmission mechanism 100. Due to the law of conservation of angular momentum, the stability of the second drum 220 of the washing machine 200 during the spin-drying process will also be greatly improved, which can significantly reduce the shaking of the washing machine 200 body during spin-drying, thereby reducing spin-drying noise, increasing spin-drying speed, and reducing the moisture content of clothes.

[0086] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of this application and do not limit the scope of protection of this patent application.

Claims

1. A transmission mechanism, characterized in that, The transmission mechanism includes: The drive shaft is configured to be rotatable; A support, which is annular in shape and has an inner annular surface, surrounds the drive shaft in the circumferential direction of the drive shaft, and is configured to be fixed relative to the drive shaft; A bracket is connected to the drive shaft and can drive the drive shaft to rotate. The transmission component is rotatably mounted on the bracket; An electric motor, including a drive end configured to drive the transmission element to rotate; The driving end and the inner annular surface are respectively engaged with the transmission component. The transmission component is configured to rotate around the driving end in the circumferential direction during rotation, and drive the bracket to rotate, so as to drive the transmission shaft to rotate through the bracket.

2. The transmission mechanism according to claim 1, characterized in that, The bracket includes a body, which is sleeved on the drive shaft; The transmission component includes connected teeth and a shaft. The drive end and the inner ring surface respectively mesh with the teeth, and the shaft is rotatably inserted into the body.

3. The transmission mechanism according to claim 2, characterized in that, The bracket also includes a support portion surrounding the body, and the shaft portion is rotatably inserted into the support portion.

4. The transmission mechanism according to claim 3, characterized in that, The bracket also includes a limiting part, which surrounds the body and is connected to the supporting part; The limiting part has an opening for the teeth to protrude from the limiting part; The driving end extends into the inner side of the limiting part and engages with the teeth, and the inner annular surface engages with the portion of the teeth that protrudes from the opening.

5. The transmission mechanism according to claim 4, characterized in that, The limiting part includes a first limiting part and a second limiting part; The first limiting part and the second limiting part are respectively connected to the support part. The second limiting part is located inside the first limiting part. The first limiting part has a first opening for the tooth to be exposed in the first limiting part, and the second limiting part has a second opening for the tooth to be exposed in the second limiting part. The driving end extends into the inner side of the second limiting part and engages with the portion of the teeth that protrude from the second opening; The inner annular surface engages with the portion of the teeth that protrudes from the first opening.

6. The transmission mechanism according to claim 5, characterized in that, The bracket also includes a cover plate surrounding the drive end in the circumferential direction; The cover plate is placed on the end of the limiting part that is opposite to the supporting part; The end of the toothed portion opposite to the support portion is provided with the shaft portion, which is rotatably inserted into the cover plate.

7. The transmission mechanism according to claim 2, characterized in that, The inner ring surface is provided with a first tooth surface, and the number of teeth on the first tooth surface is Z2; A second tooth surface is provided on the side wall of the drive end, and the number of teeth on the second tooth surface is Z1; The first tooth surface and the second tooth surface respectively mesh with the tooth portion; And it satisfies: 2.5≤(1+Z2) / Z1≤5.

8. The transmission mechanism according to claim 7, characterized in that, The support includes a toothed ring, which is internally connected to the inner annular surface, and the tooth surface of the toothed ring forms the first tooth surface.

9. The transmission mechanism according to claim 7, characterized in that, The transmission mechanism further includes a drive wheel, which is sleeved on the drive end, and the drive end drives the drive wheel to rotate; The second tooth surface is disposed on the side wall of the drive wheel.

10. The transmission mechanism according to claim 7, characterized in that, The support includes a main body in the shape of a ring. The main body includes a first segment and a second segment connected together. The inner diameter of the first segment is smaller than the inner diameter of the second segment. The first tooth surface is disposed on the inner annular surface located in the second segment; The bracket is disposed on the inner side of the second section; The drive end extends into the inner side of the second segment.

11. The transmission mechanism according to claim 10, characterized in that, The support also includes a connecting bearing; The connecting bearing is disposed in the first section, the outer ring of the connecting bearing is in contact with the inner ring surface located in the first section, and the inner ring of the connecting bearing is sleeved on the transmission shaft, so that the transmission shaft can rotate relative to the support.

12. A washing machine, characterized in that, include: A first drum and a second drum, wherein the washing capacity of the first drum is greater than that of the second drum, and the second drum includes an outer drum and an inner drum coaxially disposed inside the outer drum; as well as The transmission mechanism as described in any one of claims 1 to 11, wherein the transmission shaft is connected to the inner cylinder to drive the inner cylinder to rotate; The support is mounted on the outer cylinder.

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