A transmission system and a clothes dryer

Abstract

The present application relates to the technical field of clothes drying machine, and discloses a transmission system and clothes drying machine. The transmission system comprises a driving module, a transition module and a driven module. The driving module comprises a motor shaft, a driving belt wheel and a driving gear. The transition module comprises a transition shaft, a transition belt wheel and a driven gear. The driven module comprises a fan shaft, a pressing disc, a first driven wheel and a second driven wheel. The pressing disc is fixedly sleeved on the fan shaft. The fan shaft is provided with a first threaded section and a second threaded section which are opposite in rotation direction and located on the two sides of the pressing disc respectively. The fan shaft is further provided with a first optical axis section connected with the first threaded section and away from the pressing disc, and a second optical axis section connected with the second threaded section and away from the pressing disc. The present application can keep the fan shaft rotating in one direction all the time no matter in which direction the motor shaft rotates, so that the clothes drying machine using the transmission system can rotate the drum in both directions to prevent winding, and keep the fan rotating in one direction to continuously blow air.

Description

Technical Field

[0001] This invention relates to the field of clothes dryer technology, and more particularly to a transmission system and a clothes dryer. Background Technology

[0002] Due to cost and space constraints, dryers typically only have one motor (10') that drives both the drum (30') and the fan (40'). Figure 1 As shown, the roller 30' is disposed inside the housing 60', and the housing 60' has an opening that connects to the roller 30'. The door 70' can open and close the opening. The roller 30' is used to hold clothes. The first output shaft 11' of the motor 10' is driven and connected to the roller 30' through the roller belt 21'. The motor 10' can drive the roller 30' to rotate, causing the clothes to tumble. During this process, different parts of the clothes are randomly exposed to the air. The heat generated by the condenser (heat pump type) or the electric heating module (condenser type) accelerates the evaporation of moisture in the clothes. The second output shaft 12' of the motor 10' is driven and connected to the fan shaft 41' through the fan belt 22'. The motor 10' can drive the fan shaft 41' to rotate, thereby causing the fan 40' to rotate. The hot air blown out by the fan 40' is blown into the roller 30' through the air duct 50', causing the water vapor evaporated in the roller 30' to quickly flow out of the roller 30' for condensation and drainage. If the 30' drum continues to rotate in one direction, clothes will become severely tangled, preventing the center of the bundled clothes from drying. This also makes it inconvenient for users to handle the clothes after taking them out, resulting in a poor user experience.

[0003] To address these issues, current dryers typically rotate clockwise for a certain period followed by counter-clockwise for a certain period. Since most dryers use the same motor to drive the drum and fan, if the fan-driven airflow during clockwise rotation follows the designed airflow path, effectively delivering warm, humid air and condensing moisture, then the airflow path reverses during counter-clockwise rotation. This not only results in extremely low airflow efficiency but, more importantly, renders drying impossible. While this solves the problem of clothes tangling, it reduces drying efficiency by over 50%. This is because, although moisture cannot be condensed during counter-clockwise rotation, the compressor or heating module is still working, significantly increasing drying time and energy consumption.

[0004] The current compromise is as follows: although forward and reverse rotation is used, the forward rotation time is longer than the reverse rotation time, which improves efficiency, but the entanglement problem is not completely solved, and the efficiency loss is still more than 30%!

[0005] Therefore, there is an urgent need for a transmission system and a clothes dryer to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a transmission system and a clothes dryer that can ensure that the fan shaft always rotates in one direction, regardless of which direction the motor shaft rotates.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A transmission system, comprising:

[0009] The drive module includes a motor shaft, a drive pulley, and a drive gear. The drive pulley is fixedly connected to the motor shaft in the circumferential direction and slidably connected to the motor shaft in the axial direction. The drive gear is fixedly connected to the motor shaft.

[0010] The transition module includes a transition shaft, a transition pulley, and a driven gear. The transition pulley is fixedly connected to the transition shaft circumferentially and slidably connected to the transition shaft axially. The driven gear is fixedly connected to the transition shaft and meshes with the drive gear.

[0011] The driven module includes a fan shaft, a pressure plate, a first driven wheel, and a second driven wheel. The pressure plate is fixedly sleeved on the fan shaft. The fan shaft has a first threaded section and a second threaded section with opposite rotation directions, located on both sides of the pressure plate. The fan shaft also has a first optical shaft section connected to the first threaded section and facing away from the pressure plate, and a second optical shaft section connected to the second threaded section and facing away from the pressure plate. The first driven wheel has an internal thread that matches the first threaded section. The first driven wheel can switch positions between the first threaded section and the first optical shaft section. A first transmission belt is sleeved on the first driven wheel and the drive pulley. The second driven wheel has an internal thread that matches the second threaded section. The second driven wheel can switch positions between the second threaded section and the second optical shaft section. A second transmission belt is sleeved on the second driven wheel and the transition pulley.

[0012] As a preferred technical solution for the transmission system, the motor shaft is provided with a first spline segment, the drive pulley is fixedly connected to the first spline segment in the circumferential direction, and is slidably connected to the first spline segment in the axial direction.

[0013] As a preferred technical solution for the transmission system, the transition shaft is provided with a second spline segment, the transition pulley is fixedly connected to the second spline segment circumferentially and slidably connected to the second spline segment axially.

[0014] As a preferred technical solution for the transmission system, a first cavity is provided on the side of the first driven wheel facing the pressure plate, and a second cavity is provided on the side of the second driven wheel facing the pressure plate; or the first cavity is provided on the side of the pressure plate facing the first driven wheel, and a second cavity is provided on the side of the pressure plate facing the second driven wheel.

[0015] As a preferred technical solution for the transmission system, a third cavity is provided on the side of the first driven wheel away from the pressure plate, and a fourth cavity is provided on the side of the second driven wheel away from the pressure plate.

[0016] As a preferred technical solution for the transmission system, the transition pulley is provided with a fifth cavity on the side opposite to the driven gear.

[0017] As a preferred technical solution for the transmission system, the length of the first optical shaft segment is equal to the length at the hub of the first driven wheel, and the length of the second optical shaft segment is equal to the length at the hub of the second driven wheel.

[0018] As a preferred technical solution for the transmission system, the fan shaft and the pressure plate are integrally formed.

[0019] As a preferred technical solution for the transmission system, the first threaded section is right-handed and the second threaded section is left-handed.

[0020] A clothes dryer includes a drive system as described in any of the above embodiments.

[0021] The beneficial effects of this invention are:

[0022] The transmission system provided by this invention can ensure that the fan shaft always rotates in one direction, regardless of which direction the motor shaft rotates. Therefore, a dryer using this transmission system can use only one motor to prevent the drum from rotating in both directions to prevent tangling, and to keep the fan in one direction for continuous air delivery. There is no need to set up an additional motor, which saves costs and reduces space occupation, ensuring that the size of the dryer does not increase. Attached Figure Description

[0023] Figure 1 This is a top sectional view of a clothes dryer in the prior art;

[0024] Figure 2 This is a schematic diagram of the transmission system provided in an embodiment of the present invention;

[0025] Figure 3 yes Figure 2 A cross-sectional view along the AA direction;

[0026] Figure 4 This is a schematic diagram of the movement direction of each wheel in the transmission system provided in this embodiment of the invention when the motor shaft rotates clockwise. Figure 1 ;

[0027] Figure 5 This is a schematic diagram of the movement direction of each wheel in the transmission system provided in this embodiment of the invention when the motor shaft rotates clockwise. Figure 2 ;

[0028] Figure 6This is a schematic diagram of the motion direction of each wheel in the transmission system provided in this embodiment of the invention when the motor shaft rotates counterclockwise. Figure 1 ;

[0029] Figure 7 This is a schematic diagram of the motion direction of each wheel in the transmission system provided in this embodiment of the invention when the motor shaft rotates counterclockwise. Figure 2 .

[0030] In the picture:

[0031] 10' Motor; 11' First output shaft; 12' Second output shaft; 21' Drum belt; 22' Fan belt; 30' Drum; 40' Fan; 41' Fan shaft; 50' Air duct; 60' Housing; 70' Door;

[0032] 11. Motor shaft; 111. First spline section; 12. Drive pulley; 13. Drive gear; 21. Transition shaft; 211. Second spline section; 22. Transition pulley; 221. Fifth cavity; 23. Driven gear; 31. Fan shaft; 311. First threaded section; 312. Second threaded section; 313. First smooth shaft section; 314. Second smooth shaft section; 32. Pressure plate; 33. First driven wheel; 331. First cavity; 332. Third cavity; 34. Second driven wheel; 341. Second cavity; 342. Fourth cavity; 41. First transmission belt; 42. Second transmission belt. Detailed Implementation

[0033] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings, not all of them.

[0034] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0037] like Figure 2 and Figure 3As shown, the present invention provides a transmission system including a drive module, a transition module, and a driven module. The drive module includes a motor shaft 11, a drive pulley 12, and a drive gear 13. The drive pulley 12 is fixedly connected to the motor shaft 11 circumferentially and slidably connected to the motor shaft 11 axially. The drive gear 13 is fixedly connected to the motor shaft 11. The transition module includes a transition shaft 21, a transition pulley 22, and a driven gear 23. The transition pulley 22 is fixedly connected to the transition shaft 21 circumferentially and slidably connected to the transition shaft 21 axially. The driven gear 23 is fixedly connected to the transition shaft 21 and meshes with the drive gear 13. The driven module includes a fan shaft 31, a pressure plate 32, a first driven wheel 33, and a second driven wheel 34. The pressure plate 32 is fixedly sleeved on the fan shaft 31. Preferably, the pressure plate 32 and the fan shaft 31 are integrally formed. The fan shaft 31 is provided with a first threaded section 311 and a second threaded section 312 with opposite rotation directions located on both sides of the pressure plate 32. The fan shaft 31 is also provided with a first optical shaft section 313 connected to the first threaded section 311 and away from the pressure plate 32, and a second optical shaft section 314 connected to the second threaded section 312 and away from the pressure plate 32. The first driven wheel 33 is provided with an internal thread that matches the first threaded section 311. The first driven wheel 33 can switch positions between the first threaded section 311 and the first optical shaft section 313. The first driven wheel 33 and the drive pulley 12 are fitted with a first transmission belt 41. The second driven wheel 34 is provided with an internal thread that matches the second threaded section 312. The second driven wheel 34 can switch positions between the second threaded section 312 and the second optical shaft section 314. The second driven wheel 34 and the transition pulley 22 are fitted with a second transmission belt 42.

[0038] In this embodiment, the first threaded section 311 is a right-hand thread, and the second threaded section 312 is a left-hand thread. Combined with... Figure 4 and Figure 5As shown, when the motor shaft 11 rotates clockwise, the drive pulley 12 drives the first driven pulley 33 to rotate clockwise via the first transmission belt 41. Since the first driven pulley 33 and the first threaded section 311 on the fan shaft 31 are in right-hand thread engagement, the first driven pulley 33 will rotate towards the pressure plate 32 and eventually press against the pressure plate 32, thereby driving the fan shaft 31 to rotate clockwise. At the same time, the drive pulley 12 will move along the motor shaft 11 under the action of the first transmission belt 41 until it is on the same plane as the first driven pulley 33, thus minimizing resistance; simultaneously, with The drive gear 13, which is fixedly connected to the motor shaft 11, drives the driven gear 23 to rotate counterclockwise. The transition pulley 22 drives the second driven pulley 34 to rotate counterclockwise through the second transmission belt 42. Since the second driven pulley 34 and the second threaded section 312 on the fan shaft 31 are in left-hand thread engagement, the second driven pulley 34 will rotate away from the pressure plate 32 and enter the second smooth shaft section 314 for idling. At the same time, the transition pulley 22 will move along the transition shaft 21 under the action of the second transmission belt 42 until it is on the same plane as the second driven pulley 34, thereby minimizing resistance.

[0039] Combination Figure 6 and Figure 7 As shown, when the motor shaft 11 rotates counterclockwise, the drive pulley 12 drives the first driven pulley 33 to rotate counterclockwise via the first transmission belt 41. Since the first driven pulley 33 and the first threaded section 311 on the fan shaft 31 are in right-hand thread engagement, the first driven pulley 33 will rotate away from the pressure plate 32 and enter the first smooth shaft section 313 for idling. At the same time, the drive pulley 12 will move under the action of the first transmission belt 41 to be on the same plane as the first driven pulley 33, thereby minimizing resistance. Meanwhile, the drive pulley 12, which is fixedly connected to the motor shaft 11... The driven gear 13 drives the driven gear 23 to rotate clockwise, and the transition pulley 22 drives the second driven pulley 34 to rotate clockwise via the second transmission belt 42. Since the second driven pulley 34 and the second threaded section 312 on the fan shaft 31 are in left-hand thread engagement, the second driven pulley 34 will rotate in the direction of pressing the pressure plate 32 and eventually press the pressure plate 32, thereby driving the fan shaft 31 to rotate clockwise. At the same time, the transition pulley 22 will move along the transition shaft 21 under the action of the second transmission belt 42 until it is on the same plane as the second driven pulley 34, thereby minimizing resistance.

[0040] In this embodiment, regardless of whether the motor shaft 11 rotates clockwise or counterclockwise, the fan shaft 31 will always rotate clockwise. Similarly, in other embodiments, the first threaded section 311 can be a left-hand thread, and the second threaded section 312 can be a right-hand thread; similarly, regardless of whether the motor shaft 11 rotates clockwise or counterclockwise, the fan shaft 31 will always rotate counterclockwise. In summary, this transmission system ensures that the fan shaft 31 rotates in one direction regardless of which direction the motor shaft 11 rotates. Therefore, a dryer using this transmission system only needs one motor to prevent the drum from tangling in both forward and reverse rotation, and to maintain a single direction for continuous airflow from the fan, eliminating the need for an additional motor, saving costs, reducing space requirements, and ensuring that the dryer's size does not increase.

[0041] A first spline segment 111 is provided on the motor shaft 11. The drive pulley 12 is fixedly connected to the first spline segment 111 circumferentially and slidably connected to the first spline segment 111 axially. By providing the first spline segment 111, the connection between the drive pulley 12 and the motor shaft 11 is made more stable. A second spline segment 211 is provided on the transition shaft 21. The transition pulley 22 is fixedly connected to the second spline segment 211 circumferentially and slidably connected to the second spline segment 211 axially. By providing the second spline segment 211, the connection between the transition pulley 22 and the transition shaft 21 is made more stable.

[0042] A first cavity 331 is provided on the side of the first driven wheel 33 facing the pressure plate 32, and a second cavity 341 is provided on the side of the second driven wheel 34 facing the pressure plate 32; or the first cavity 331 is provided on the side of the pressure plate 32 facing the first driven wheel 33, and the second cavity 341 is provided on the side of the pressure plate 32 facing the second driven wheel 34. By providing the first cavity 331 and the second cavity 341, when the first driven wheel 33 and the second driven wheel 34 rotate in the direction of pressing the pressure plate 32, they can contact the pressure plate 32 before reaching the end of the threaded section. The axial force generated by their continued movement causes slight deformation of the wheel rims, which can more reliably press the pressure plate 32 and better transmit power. Moreover, it can also avoid the problem of the first driven wheel 33 and the second driven wheel 34 getting stuck at the end of the thread and unable to rotate in the opposite direction.

[0043] The first driven wheel 33 has a third cavity 332 on the side opposite to the pressure plate 32, and the second driven wheel 34 has a fourth cavity 342 on the side opposite to the pressure plate 32. By providing the third cavity 332, the length of the hub of the first driven wheel 33 can be reduced, thereby reducing the length of the first threaded section 311 and the first optical shaft section 313, further reducing the overall structural size. Similarly, by providing the fourth cavity 342, the length of the hub of the second driven wheel 34 can be reduced, thereby reducing the length of the second threaded section 312 and the second optical shaft section 314, further reducing the overall structural size.

[0044] The length of the first optical shaft section 313 is equal to the length at the hub of the first driven wheel 33, allowing the first driven wheel 33 to quickly engage with the first threaded section 311 from the first optical shaft section 313. The length of the second optical shaft section 314 is equal to the length at the hub of the second driven wheel 34, allowing the second driven wheel 34 to quickly engage with the second threaded section 312 from the second optical shaft section 314. This configuration ensures that the driven wheel remains in contact with the threaded section after moving out of the threaded section and into the optical shaft section, guaranteeing rapid engagement with the threaded section during reverse rotation and ensuring no delay in power transmission. Preferably, both the first driven wheel 33 and the second driven wheel 34 are provided with anti-friction material on the side facing the pressure plate 32 to reduce wear. Preferably, a first spring is fitted onto the first optical axis segment 313, and a second spring is fitted onto the second optical axis segment 314. When the first driven wheel 33 engages with the first optical axis segment 313, the first driven wheel 33 can press against the first spring, and under the elastic force of the first spring, the first driven wheel 33 can abut against the first threaded segment 311. Similarly, when the second driven wheel 34 engages with the second optical axis segment 314, the second driven wheel 34 can press against the second spring, and under the elastic force of the second spring, the second driven wheel 34 can abut against the second threaded segment 312. By providing the first spring and the second spring, it can be further ensured that the driven wheel quickly engages with the threaded segment when reversing.

[0045] The transition pulley 22 has a fifth cavity 221 on the side opposite to the driven gear 23. By providing the fifth cavity 221, the weight of the transition pulley 22 can be reduced, and the length of the second spline section 211 of the transition pulley 22 can be reduced, thereby further reducing the overall structural size.

[0046] This invention also provides a clothes dryer, which includes at least a motor, a drum, a fan, and a transmission system as described above. The motor has a first output shaft and a second output shaft. The first output shaft of the motor is driven and connected to the drum. The second output shaft of the motor is the motor shaft 11 involved in the transmission system. The fan shaft 31 in the transmission system is connected to the fan. The motor can drive the drum and the fan simultaneously through the transmission system. By using the above transmission system, the fan shaft 31 can always rotate clockwise, regardless of whether the motor rotates clockwise or counterclockwise. Thus, only one motor is needed to prevent the drum from tangling in both directions and to keep the fan in one direction for continuous air delivery, eliminating the need for an additional motor and saving costs.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A transmission system, characterized in that, include: The drive module includes a motor shaft (11), a drive pulley (12) and a drive gear (13). The drive pulley (12) is fixedly connected to the motor shaft (11) in the circumferential direction and slidably connected to the motor shaft (11) in the axial direction. The drive gear (13) is fixedly connected to the motor shaft (11). The transition module includes a transition shaft (21), a transition pulley (22), and a driven gear (23). The transition pulley (22) is fixedly connected to the transition shaft (21) circumferentially and slidably connected to the transition shaft (21) axially. The driven gear (23) is fixedly connected to the transition shaft (21) and meshes with the drive gear (13). The driven module includes a fan shaft (31), a pressure plate (32), a first driven wheel (33), and a second driven wheel (34). The pressure plate (32) is fixedly sleeved on the fan shaft (31). The fan shaft (31) is provided with a first threaded section (311) and a second threaded section (312) with opposite rotation directions and located on both sides of the pressure plate (32). The fan shaft (31) is also provided with a first optical axis section (313) connected to the first threaded section (311) and facing away from the pressure plate (32) and a second optical axis section (314) connected to the second threaded section (312) and facing away from the pressure plate (32). The first driven wheel (33) is provided with... The first driven wheel (33) has an internal thread that matches the first threaded section (311). The first driven wheel (33) can switch positions between the first threaded section (311) and the first optical shaft section (313). The first driven wheel (33) and the drive pulley (12) are fitted with a first transmission belt (41). The second driven wheel (34) has an internal thread that matches the second threaded section (312). The second driven wheel (34) can switch positions between the second threaded section (312) and the second optical shaft section (314). The second driven wheel (34) and the transition pulley (22) are fitted with a second transmission belt (42).

2. The transmission system according to claim 1, characterized in that, The motor shaft (11) is provided with a first spline segment (111), and the drive pulley (12) is fixedly connected to the first spline segment (111) in the circumferential direction and slidably connected to the first spline segment (111) in the axial direction.

3. The transmission system according to claim 1, characterized in that, The transition shaft (21) is provided with a second spline segment (211), and the transition pulley (22) is fixedly connected to the second spline segment (211) in the circumferential direction and slidably connected to the second spline segment (211) in the axial direction.

4. The transmission system according to claim 1, characterized in that, The first driven wheel (33) has a first cavity (331) on the side facing the pressure plate (32), and the second driven wheel (34) has a second cavity (341) on the side facing the pressure plate (32); or the pressure plate (32) has a first cavity (331) on the side facing the first driven wheel (33), and the pressure plate (32) has a second cavity (341) on the side facing the second driven wheel (34).

5. The transmission system according to claim 1, characterized in that, The first driven wheel (33) has a third cavity (332) on the side away from the pressure plate (32), and the second driven wheel (34) has a fourth cavity (342) on the side away from the pressure plate (32).

6. The transmission system according to claim 1, characterized in that, The transition pulley (22) has a fifth cavity (221) on the side opposite to the driven gear (23).

7. The transmission system according to claim 1, characterized in that, The length of the first optical axis segment (313) is equal to the length of the hub of the first driven wheel (33), and the length of the second optical axis segment (314) is equal to the length of the hub of the second driven wheel (34).

8. The transmission system according to claim 1, characterized in that, The fan shaft (31) and the pressure plate (32) are integrally formed.

9. The transmission system according to claim 1, characterized in that, The first thread segment (311) is right-handed, and the second thread segment (312) is left-handed.

10. A clothes dryer, characterized in that, Includes the transmission system as described in any one of claims 1-9.

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