Direct-drive efficient driving module for clothes dryer and clothes dryer

Abstract

The direct-drive efficient driving module comprises a stator assembly, a rotor assembly and a speed reducer module, the speed reducer module is fixed to the radial inner side of the stator assembly, and the rotor assembly is rotationally arranged on the radial outer side of the stator assembly; the speed reducer module comprises a shell, an outer gear ring, a planet wheel, a sun wheel shaft, a planet wheel mounting support and a speed reducer output shaft, the sun wheel shaft and the speed reducer output shaft are rotationally connected with the two sides of the shell correspondingly, one end of the speed reducer output shaft penetrates out of the shell, and the sun wheel is fixed to the sun wheel shaft; the outer gear ring is fixed to the inner wall of the shell and is in meshing transmission with the sun gear through the planet gear, the planet gear shaft is rotationally arranged in the middle of the planet gear, and the two ends of the planet gear shaft are fixed to the planet gear mounting support and the speed reducer output shaft respectively. The device is high in overall integration level and transmission efficiency, more energy is saved, cost can be reduced, and meanwhile subsequent maintenance is more convenient.

Description

Technical Field

[0001] The present invention belongs to the technical field of motors, and in particular relates to a direct-drive high-efficiency drive module for a clothes dryer and a clothes dryer. Background Art

[0002] Traditional clothes dryers are all driven by a belt connection between the transmission motor and the driving wheel of the drying barrel. This traditional transmission method has transmission attenuation, which reduces energy utilization efficiency and is prone to noise. In addition, the belt of the belt transmission mechanism is a wearing part with a short service life, which affects the service life of the entire machine.

[0003] Chinese patent CN216514732U discloses a coaxially driven clothes dryer, which drives the dryer drum by arranging a gear reducer on the output shaft of the driving motor. Although the transmission efficiency is improved compared with the original belt drive, the driving motor and reducer used in the dryer are independent of each other, with low integration, and the overall space occupied is large (especially the axial length is long). During installation, the reducer and the motor are required to be in a coaxial position, which has high installation requirements and low assembly efficiency. Summary of the invention

[0004] In order to solve the above technical problems, the first purpose of the present invention is to provide a direct-drive high-efficiency drive module for a dryer, which can be maintained in a high-efficiency working speed range, has a high degree of integration, adopts a modular design, is easy to disassemble and assemble, and has high production efficiency; the second purpose of the present invention is to provide a dryer.

[0005] In order to achieve the first object of the above invention, the present invention adopts the following technical solutions:

[0006] A direct-drive high-efficiency drive module for a clothes dryer comprises a stator assembly, a rotor assembly and a reducer module, wherein the stator assembly is annular, the reducer module is fixed on the radial inner side of the stator assembly, and the rotor assembly is rotatably arranged on the radial outer side of the stator assembly, the reducer module comprises a housing, an outer gear ring, a planetary gear, a sun gear shaft, a planetary gear mounting bracket and a reducer output shaft, the sun gear shaft and the reducer output shaft are respectively rotatably connected to both sides of the housing, and one end of the reducer output shaft passes through the housing, a sun gear is fixed on the sun gear shaft, and the end of the sun gear shaft close to the housing is transmission-connected to the rotor assembly, the outer gear ring is fixed to the inner wall of the housing, and is meshed with the sun gear through the planetary gear, a planetary gear shaft is rotatably arranged in the middle of the planetary gear, and the two ends of the planetary gear shaft are respectively fixed to the planetary gear mounting bracket and the reducer output shaft.

[0007] When the rotor assembly of the motor of the present invention rotates, it drives the sun gear shaft to rotate, and then the sun gear drives the planetary gear to rotate around the ring gear. At the same time, the planetary gear mounting bracket and the reducer output shaft will also rotate accordingly, and the reducer output shaft can drive the corresponding equipment.

[0008] As a preferred embodiment, the housing includes an end cover A and an end cover B fixed to each other, and an installation cavity is formed between the end cover A and the end cover B. The middle part of the end cover A protrudes outward to form a bearing chamber A. The reducer output shaft includes a shaft body and a mounting plate fixed to one end of the shaft body. The other end of the shaft body is rotatably connected to the end cover A through a bearing A arranged in the bearing chamber A.

[0009] As a preferred solution, the mounting plate is integrally formed with the output shaft, a bearing chamber B is further provided at one end of the output shaft, and one end of the sun gear shaft is rotationally connected to the output shaft of the reducer via a bearing B provided in the bearing chamber.

[0010] As a preferred solution, a flange is provided outside the bearing chamber A on the end cover A, and a shaft seal is provided between the output shaft and the flange. The shaft seal can prevent the lubricating oil in the reducer module from overflowing.

[0011] As a preferred solution, the middle part of the end cover B also bulges outward to form a bearing chamber C, and the other end of the sun gear shaft is rotatably connected to the end cover B via a bearing C disposed in the bearing chamber C. The sun gear shaft (input) and the reducer output shaft (output) are coaxially rotatably arranged by using a bearing, which improves the stability of the motor operation, helps reduce noise, and prolongs the service life.

[0012] As a preferred embodiment, a through hole is provided on the bearing chamber C, and the other end of the sun gear shaft passes through the bearing C and the through hole. The middle part of the rotor assembly is connected to the end of the sun gear shaft by interference fit, keyway fit or tooth groove fit.

[0013] As a preferred embodiment, a transmission tooth is provided at the end of the other end of the sun gear shaft, and a step surface is formed between the transmission tooth and the sun gear shaft. A rotor spline is provided in the middle of the rotor assembly, and a gear ring is provided in the middle of the rotor spline and protrudes inward. The rotor spline is axially pressed against the step surface and the inner ring of the bearing C through a limiting bolt, and the gear ring of the rotor spline is meshed with the transmission tooth of the sun gear shaft for transmission.

[0014] As a preferred solution, a notch is formed in the middle of the rotor assembly, the rotor spline is arranged in the notch, and the notch is sleeved outside the bearing chamber C, with a gap between the notch and the bearing chamber. The outer ring of the bearing chamber C, the inner ring of the notch, and the inner convex structure of the rotor spline form a reciprocating labyrinth structure, which helps to prevent the leakage of lubricating oil in the reducer module.

[0015] As a preferred solution, the inner ring of the stator assembly is provided with a stator mounting flange, the housing is provided with a circle of outer convex edges, and the stator mounting flange and the outer convex edges are fixed by bolts. The above structure enables the reducer module and the stator assembly to have a preliminary positioning structure when being installed, thereby improving the convenience of installation.

[0016] In order to achieve the second purpose of the above invention, the present invention adopts the following technical solutions:

[0017] A clothes dryer adopts any one of the integrated drive modules described above.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention adopts an outer rotor disc motor and fixes the reducer module in the stator assembly. Through the reducer module, the outer rotor disc motor can maintain an efficient working speed range of 300-500rpm; the motor energy conversion efficiency is as high as over 85%, which can effectively save energy, reduce motor costs and motor temperature rise; and the input end of the reducer module is connected to the rotor, which greatly reduces the axial length of the drive module, making the overall integration high and the volume small. At the same time, since the reducer adopts a modular structure, it is easy to disassemble and assemble, which is convenient for subsequent maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation on the present application.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a cross-sectional structural schematic diagram of the present invention;

[0023] Figure 3 and Figure 4 It is a schematic diagram of the explosion structure of the present invention at two different angles;

[0024] The accompanying drawings are marked as follows: 1. stator assembly; 11. stator mounting flange; 2. rotor assembly; 21. rotor spline; 3. reducer module; 30. reducer output shaft; 301. bearing A; 302. shaft seal; 31. end cover A; 32. end cover B; 321. outer convex edge; 33. sun gear; 331. bearing B; 332. bearing C; 34. planetary gear mounting bracket; 35. planetary gear; 36. planetary gear shaft; 37. outer gear ring; 4. limit bolt. DETAILED DESCRIPTION

[0025] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] In addition, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

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

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

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0032] like Figures 1 to 4 As shown, a direct-drive high-efficiency drive module for a clothes dryer comprises a stator assembly 1, a rotor assembly 2 and a reducer module 3. The stator assembly 1 is annular, and the reducer module 3 is fixed on the radial inner side of the stator assembly 1. The inner ring of the stator assembly 1 is provided with a stator mounting flange 11, and the shell of the reducer module 3 is provided with a circle of outer convex edges 321. During installation, the stator assembly 1 is sleeved on the reducer module 3, and the stator mounting flange 11 is abutted against the outer convex edge, and then tightened by bolts; the rotor assembly 2 is rotatably arranged on the radial outer side of the stator assembly 1, and is drivingly connected to the input end of the reducer module.

[0033] like Figures 2 to 4 As shown, the reducer module is a first-stage planetary reducer, which adopts a reduction ratio design in the range of 5:1 to 7:1. In this embodiment, 6.88:1 is selected, and the operating speed of the drive module is 250rpm to 350rpm. This speed range is the high-efficiency area of ​​the motor of the drive module. The motor energy conversion efficiency is more than 85%, which can effectively save energy and reduce motor costs and motor temperature rise.

[0034] The reducer module includes a shell, an outer gear ring 37, a planetary gear 35, a sun gear shaft 33, a planetary gear mounting bracket 34 and a reducer output shaft 30, wherein the sun gear shaft 33 and the reducer output shaft 30 are rotatably connected to the two sides of the shell respectively, and one end of the reducer output shaft 30 passes through the shell, and a circle of transmission teeth is also provided on the outer wall of the part passing through the shell, which is convenient for connecting and transmitting with the equipment; a sun gear is fixed on the sun gear shaft 33, and the sun gear and the sun gear shaft 33 are integrally formed, and one end of the sun gear shaft 33 close to the shell is transmission-connected to the rotor assembly 2, the outer gear ring 37 is fixed to the inner wall of the shell, and is meshed with the sun gear through the planetary gear 35 for transmission, a planetary gear shaft 36 is rotatably provided in the middle of the planetary gear 35, and the two ends of the planetary gear shaft 36 are respectively fixed to the planetary gear mounting bracket 34 and the mounting plate on the reducer output shaft 30.

[0035] In this embodiment, there are three planetary gears, and a planetary gear shaft is embedded in the middle of each planetary gear through a bearing. The three planetary gear shafts are equidistantly arranged on the planetary gear mounting bracket 34 and the bottom plate of the reducer output shaft 30. The rotor assembly drives the sun gear shaft to rotate, and then the sun gear drives the planetary gear to rotate around the ring gear. At the same time, the planetary gear mounting bracket 34 and the reducer output shaft 30 will also rotate accordingly, and the reducer output shaft 30 can drive the corresponding equipment.

[0036] The housing includes an end cover A31 and an end cover B32 fixed to each other, and a mounting cavity is formed between the end cover A31 and the end cover B32. The middle part of the end cover A31 protrudes outward to form a bearing chamber A. The reducer output shaft 30 includes a shaft body and a mounting plate fixed to one end of the shaft body. The other end of the shaft body is rotatably connected to the end cover A31 through a bearing A301 arranged in the bearing chamber A. A circle of flange is also provided outside the bearing chamber A on the end cover A31, and a shaft seal 302 is also provided between the shaft body and the flange. The setting of the shaft seal can prevent the lubricating oil in the reducer module from overflowing.

[0037] The mounting plate is integrally formed with the shaft body, and one end of the shaft body is also provided with a bearing chamber B. One end of the sun gear shaft 33 is rotatably connected to the reducer output shaft 30 via a bearing B331 provided in the bearing chamber. The sun gear shaft 33 (input) and the reducer output shaft 30 (output) are coaxially rotatably arranged by using the bearing, which improves the stability of the motor operation, helps reduce noise, and prolongs the service life.

[0038] The middle part of the end cover B32 also protrudes outward to form a bearing chamber C, and the other end of the sun gear shaft 33 is rotatably connected to the end cover B32 through a bearing C332 disposed in the bearing chamber C. A through hole is provided on the bearing chamber C, and the other end of the sun gear shaft 33 passes through the bearing C332 and the through hole, and the middle part of the rotor assembly is connected to the end of the sun gear shaft 33 through an interference fit, a keyway fit, or a tooth groove fit.

[0039] In this embodiment, a transmission tooth is integrally formed at the end of the other end of the sun gear shaft 33, and a step surface is formed between the transmission tooth and the sun gear shaft 33. The rotor assembly can be made of BMC or PP material, and a metal rotor spline 21 is embedded in the middle. A gear ring is provided in the middle of the rotor spline 21 and protrudes inward. The rotor spline 21 is axially pressed against the step surface and the inner ring of the bearing C332 through a limiting bolt 4, and the gear ring of the rotor spline 21 is meshed with the transmission tooth of the sun gear shaft 33 for transmission.

[0040] A notch is formed in the middle of the rotor assembly 2, and the rotor spline 21 is arranged in the notch. The notch is sleeved outside the bearing chamber C, and a gap is left between the notch and the bearing chamber. The outer ring of the bearing chamber C, the inner ring of the notch, and the inner convex structure of the rotor spline form a reciprocating labyrinth structure, which helps to prevent the leakage of lubricating oil in the reducer module.

[0041] The present invention also provides a clothes dryer, which adopts the above-mentioned direct-drive high-efficiency drive module for the clothes dryer.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0043] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A direct-drive high-efficiency drive module for a clothes dryer, comprising a stator assembly (1), a rotor assembly (2) and a reducer module (3), characterized in that: The stator assembly (1) is annular, the reducer module (3) is fixed on the radial inner side of the stator assembly (1), the rotor assembly (2) is rotatably arranged on the radial outer side of the stator assembly (1), the reducer module comprises a housing, an outer gear ring (37), planetary gears (35), a sun gear shaft (33), a planetary gear mounting bracket (34) and a reducer output shaft (30), the sun gear shaft (33) and the reducer output shaft (30) are respectively rotatably connected to two sides of the housing, and the reducer One end of the reducer output shaft (30) passes through the housing, a sun gear is fixed on the sun gear shaft (33), and the end of the sun gear shaft (33) close to the housing is transmission-connected to the rotor assembly (2), the outer gear ring (37) is fixed to the inner wall of the housing, and is meshed with the sun gear through the planetary gear (35), a planetary gear shaft (36) is rotatably arranged in the middle of the planetary gear (35), and the two ends of the planetary gear shaft (36) are respectively fixed to the planetary gear mounting bracket (34) and the reducer output shaft (30).

2. The direct-drive high-efficiency drive module for a clothes dryer according to claim 1, characterized in that: The housing comprises an end cover A (31) and an end cover B (32) fixed to each other, and a mounting cavity is formed between the end cover A (31) and the end cover B (32), the middle portion of the end cover A (31) protrudes outward to form a bearing chamber A, the reducer output shaft (30) comprises a shaft body and a mounting plate fixed to one end of the shaft body, and the other end of the output shaft is rotatably connected to the end cover A (31) via a bearing A (301) arranged in the bearing chamber A.

3. The direct-drive high-efficiency drive module for a clothes dryer according to claim 2, characterized in that: The mounting plate is integrally formed with the output shaft, and a bearing chamber B is also provided at one end of the output shaft. One end of the sun gear shaft (33) is rotatably connected to the output shaft (30) of the reducer via a bearing B (331) provided in the bearing chamber.

4. The direct-drive high-efficiency drive module for a clothes dryer according to claim 2, characterized in that: A flange is also provided outside the bearing chamber A on the end cover A (31), and a shaft seal (302) is also provided between the output shaft and the flange.

5. The direct-drive high-efficiency drive module for a clothes dryer according to claim 2, characterized in that: The middle portion of the end cover B (32) also protrudes outward to form a bearing chamber C. The other end of the sun gear shaft (33) is rotatably connected to the end cover B (32) via a bearing C (332) disposed in the bearing chamber C.

6. The direct-drive high-efficiency drive module for a clothes dryer according to claim 5, characterized in that: The bearing chamber C is provided with a through hole, and the other end of the sun gear shaft (33) passes through the bearing C (332) and the through hole. The middle part of the rotor assembly is connected to the end of the sun gear shaft (33) through interference fit, keyway fit or tooth groove fit.

7. The direct-drive high-efficiency drive module for a clothes dryer according to claim 6, characterized in that: The other end of the sun gear shaft (33) is provided with a transmission tooth, and a step surface is formed between the transmission tooth and the sun gear shaft (33). A rotor spline (21) is provided in the middle of the rotor assembly, and a gear ring is provided in the middle of the rotor spline (21) and protrudes inward. The rotor spline (21) is axially pressed against the step surface and the inner ring of the bearing C (332) through a limiting bolt (4), and the gear ring of the rotor spline (21) is meshed with the transmission tooth of the sun gear shaft (33) for transmission.

8. The direct-drive high-efficiency drive module for a clothes dryer according to claim 7, characterized in that: A notch is formed in the middle of the rotor assembly (2), the rotor spline (21) is arranged in the notch, and the notch is sleeved on the outside of the bearing chamber C with a gap between the notch and the bearing chamber.

9. The direct-drive high-efficiency drive module for a clothes dryer according to claim 1, characterized in that: The inner ring of the stator assembly (1) is provided with a stator mounting flange (11), the housing is provided with a circle of outer convex edges (321), and the stator mounting flange (11) and the outer convex edges (321) are fixed by bolts.

10. A clothes dryer, characterized in that: A direct-drive high-efficiency drive module for a clothes dryer as described in any one of claims 1 to 9 is adopted.

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