Speed regulating mechanism for clothes dryer motor and clothes dryer motor

Abstract

The utility model discloses a speed regulating mechanism for a clothes dryer motor and the clothes dryer motor, the speed regulating mechanism for the clothes dryer motor comprises one or more groups of clutch speed regulating units, and the plurality of groups of clutch speed regulating units are connected in sequence; the clutch speed regulation unit comprises a sun gear and a limiting cylinder, a first fluted disc and a second fluted disc are arranged on the sun gear and the limiting cylinder respectively, the sun gear and the limiting cylinder are connected with each other through a planet gear, the two sides of the planet gear are meshed with the first fluted disc and the second fluted disc respectively, and a driving disc is connected to the exterior of the planet gear; the sun gear is used for driving the planet gear to rotate after rotation, and the limiting cylinder is used for circumferentially limiting the planet gear; and the planet gear is used for forming circumferential rotation under the control of the sun gear and the limiting cylinder and driving the driving disc to rotate. The transmission device has the characteristics of good transmission effect and high motor efficiency.

Description

Technical Field

[0001] This utility model relates to a clothes dryer, and more particularly to a speed regulating mechanism for a clothes dryer motor and a clothes dryer motor. Background Technology

[0002] Due to factors such as fixed losses in motors, when a motor is rotating at low to medium speeds, its efficiency is positively correlated with its rotational speed; that is, the faster the motor speed, the higher its efficiency. However, for dryer motors, since the rotational speed of a typical dryer needs to be controlled at around 50 rpm, the efficiency of the dryer motor will decrease under this speed limit, resulting in increased energy consumption and a shortened lifespan.

[0003] To address the aforementioned issues, some manufacturers currently use a belt drive mechanism to connect the dryer drum and the dryer motor. This mechanism reduces the motor's output speed, thus increasing the motor's output speed without changing the drum's speed. However, this method has several drawbacks. For example, the belt drive generates noise during operation; belt slippage reduces the motor's transmission efficiency; belt wear occurs during use, shortening the dryer's lifespan; and the belt drive occupies internal space, reducing the drum's capacity. These limitations mean that this method cannot meet the diverse needs of both manufacturers and users for dryers.

[0004] In addition, the existing rotor magnet arrangement of dryer motors is to distribute the rotor magnets in a ring around the side wall of the rotor housing, and the magnetic flux direction of each rotor magnet is towards the motor shaft; however, this magnet arrangement cannot further improve the magnetic field strength and motor efficiency.

[0005] Therefore, existing dryer motors suffer from poor transmission performance and low motor efficiency. Utility Model Content

[0006] The purpose of this invention is to provide a speed regulating mechanism for a clothes dryer motor and a clothes dryer motor itself. It features good transmission performance and high motor efficiency.

[0007] The technical solution of this utility model is as follows: A speed regulating mechanism for a clothes dryer motor includes one or more sets of clutch speed regulating units, which are connected sequentially. Each clutch speed regulating unit includes a sun gear and a limiting cylinder. The sun gear and the limiting cylinder are respectively provided with a first gear and a second gear. The sun gear and the limiting cylinder are connected to each other via planetary gears. The two sides of the planetary gears mesh with the first gear and the second gear, respectively. A drive disk is connected to the outside of the planetary gears. The sun gear is used to drive the planetary gears to rotate after rotation. The limiting cylinder is used to circumferentially limit the planetary gears. The planetary gears are used to rotate circumferentially under the control of the sun gear and the limiting cylinder and drive the drive disk to rotate.

[0008] In the aforementioned speed control mechanism for a dryer motor, the external connection of the sun gear is the motor rotor or the drive disc of an adjacent clutch speed control unit, and the external connection of the drive disc is the motor shaft or the sun gear of an adjacent clutch speed control unit.

[0009] In the aforementioned speed control mechanism for a clothes dryer motor, the limiting cylinder is externally connected to the motor stator and forms a circumferential limit through the motor stator.

[0010] In the aforementioned speed control mechanism for a dryer motor, several limiting blocks are arranged in a ring around the outside of the limiting cylinder. The limiting blocks are used to fasten and connect the motor stator and form a circumferential limit between the limiting cylinder and the motor stator.

[0011] In the aforementioned speed control mechanism for a dryer motor, the sun gear and the limiting cylinder are nested together to form an installation groove, and the planetary gears are multiple and arranged in a ring within the installation groove. The planetary gears are externally connected to a drive disc.

[0012] A dryer motor is also provided, including a motor stator, a motor rotor, and a motor shaft, wherein the aforementioned speed regulating mechanism for a dryer motor is externally connected to the motor stator, motor rotor, and motor shaft.

[0013] In the aforementioned dryer motor, the clutch speed control unit in the speed control mechanism of the dryer motor is a set, the motor stator is driven and connected to the limiting cylinder, the sun gear is fixedly connected to the middle of the motor rotor, and the external drive disk is driven and connected to the motor shaft.

[0014] In the aforementioned dryer motor, the speed control mechanism of the dryer motor has multiple clutch speed control units. The motor stator is driven to the limiting cylinder of any clutch speed control unit, the middle part of the motor rotor is fixedly connected to the sun gear of any clutch speed control unit, and the external shaft of the motor shaft is driven to the drive disc of any clutch speed control unit.

[0015] In the aforementioned dryer motor, the motor rotor includes a rotor core, and a plurality of first magnets and second magnets are distributed in a ring around the rotor core. The first magnets and second magnets are distributed alternately, and the magnetic poles of adjacent second magnets are opposite. The magnetic field direction of the first magnets is radial, and the magnetic field direction of the second magnets is perpendicular to the radial direction.

[0016] In the aforementioned dryer motor, the second magnet includes two magnetic blocks arranged separately. The two magnetic blocks are respectively connected to two adjacent first magnets. The first magnets and magnetic blocks are glued together. The two magnetic blocks are separated from each other by a partition. The outside of the partition is connected to the rotor core.

[0017] Compared with the prior art, this utility model has the following characteristics:

[0018] (1) By limiting the structure of the clutch speed control unit, this utility model can form a speed reduction mechanism inside the dryer motor, so that the motor rotor will drive the sun gear to rotate synchronously during the rotation process, and the sun gear will drive the planet gears, so that the planet gears will rotate circumferentially along the motor shaft under the control of the sun gear and the limit cylinder, thereby driving the drive disk and the motor shaft to rotate, realizing the driving rotation and speed reduction function of the motor shaft; with the above cooperation, this utility model can increase the rotation speed of the motor rotor without changing the speed of the motor shaft, thereby improving the efficiency of the dryer motor;

[0019] (2) By replacing the belt drive mechanism with a motor speed control mechanism to achieve speed control, this utility model can also eliminate the various defects of the belt drive mechanism when used in a dryer, thereby reducing noise, improving the stability of the motor output speed, increasing the service life of the dryer, reducing the space occupied inside the dryer, and effectively improving its transmission effect.

[0020] (3) On this basis, by connecting multiple clutch speed regulation units in sequence to form a speed regulation mechanism for dryer motor, this utility model can also realize multi-stage transmission between motor rotor and motor shaft, thereby expanding the adjustment range of transmission ratio between motor rotor and motor shaft and facilitating the design and assembly of operators.

[0021] (4) By cooperating with the first magnet and the second magnet, each second magnet can form a ring magnetic field after being arranged, thereby further improving the magnetic field strength and motor efficiency of the motor; on this basis, by setting two magnetic blocks at intervals and connecting two adjacent first magnets respectively, on the one hand, the effect of the second magnet on improving the magnetic field strength can be further enhanced, and on the other hand, it can also facilitate the manufacturer to install the second magnet, that is, the second magnet can be inserted into the adjacent partitions together with the first magnet after being glued together, thereby preventing the obstruction caused by the repulsion of adjacent second magnets of the same level;

[0022] Therefore, this utility model has the characteristics of good transmission effect and high motor efficiency. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of Example 1;

[0024] Figure 2 This is a schematic diagram showing the connection between the sun gear, internal gear disk, and planet gears in Example 1;

[0025] Figure 3 This is an external view of Example 2;

[0026] Figure 4 This is a structural schematic diagram of Example 2;

[0027] Figure 5 This is a schematic diagram of the structure of Example 3;

[0028] Figure 6 This is an external view of Example 4;

[0029] Figure 7 This is a structural schematic diagram of Example 4;

[0030] Figure 8 This is a structural schematic diagram of Example 5;

[0031] Figure 9 This is a structural schematic diagram of Example 6.

[0032] The labels in the attached diagram are as follows: 1-Sun gear, 2-Limit cylinder, 3-Planet gear, 4-Drive disk, 5-Mounting slot, 6-Motor stator, 7-Motor rotor, 101-First gear disk, 201-Second gear disk, 202-Limit block, 701-Rotor core, 702-First magnet, 703-Second magnet, 704-Partition plate. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0034] Example 1. A speed regulating mechanism for a clothes dryer motor, configured as follows: Figure 1-2As shown, the device includes a set of clutch speed control units. The clutch speed control unit includes a sun gear 1 and a limiting cylinder 2 arranged in an inner and outer nested and coaxial configuration. The sun gear 1 and the limiting cylinder 2 are respectively provided with a first gear disk 101 and a second gear disk 201. The sun gear 1 and the limiting cylinder 2 are interconnected via planetary gears 3. The two sides of the planetary gears 3 are respectively meshed with the first gear disk 101 and the second gear disk 201. A drive disk 4 is connected to the outside of the planetary gears 3. A spline hole for driving the motor shaft is formed in the middle of the drive disk 4. The sun gear 1 is used to drive the planetary gears 3 to rotate after rotation. The limiting cylinder 2 is used to circumferentially limit the planetary gears 3. The planetary gears 3 are used to rotate circumferentially under the control of the sun gear 1 and the limiting cylinder 2, and drive the drive disk 4 to rotate around the axis of the motor shaft.

[0035] The sun gear 1 and the limiting cylinder 2 are connected to each other via bearings, and the drive disk 4 and the sun gear 1 are nested together and connected to each other via bearings.

[0036] The sun gear 1 is externally connected to the motor rotor, and the drive disk 4 is externally connected to the motor shaft.

[0037] The limiting cylinder 2 is externally connected to the motor stator and forms a circumferential limit through the motor stator.

[0038] The limiting cylinder 2 has several limiting blocks 202 arranged in a ring around its outer surface. The limiting blocks 202 are used to fasten and connect the motor stator and form a circumferential limit between the limiting cylinder 2 and the motor stator. Several clamping plates arranged in a ring around the end of the limiting cylinder 2 can be provided as needed. The clamping plates and the limiting blocks 202 are staggered with each other. After the limiting cylinder 2 is installed, the clamping plates fit against the side of the motor stator, thereby realizing the axial positioning between the limiting cylinder 2 and the motor stator.

[0039] The sun gear 1 and the limiting cylinder 2 are nested together to form a mounting groove 5 for accommodating the planet gears 3. There are multiple planet gears 3, which are distributed in a ring in the mounting groove 5. The planet gears 3 are rotatably connected to the drive disk 4. The drive disk 4 has a T-shaped cross-section. One end of the drive disk 4 is located on the radial inner side of the sun gear 1 and is connected to the sun gear 1 through a bearing. The other end of the drive disk 4 extends to the outer side of the mounting groove 5 and is rotatably connected to the planet gears 3 through a pin.

[0040] The inner side of the limiting cylinder 2 is fixedly connected to a sealing ring located outside the mounting groove 5, and the inner ring of the sealing ring is in contact with the outer wall of the drive disk 4.

[0041] In this embodiment, the motor rotor drives the sun gear 1 to rotate synchronously, and the sun gear 1, after rotating, applies a driving force to the planetary gears 3 through the first gear disk 101. Simultaneously, the limiting cylinder 2, in a limiting state, limits the outer end of the planetary gears 3 through the second gear disk 201, causing the planetary gears 3 to rotate circumferentially around the sun gear 1 under the combined action of the two, thereby driving the drive disk 4 to rotate around the motor shaft. The rotation of the drive disk 4 then drives the motor shaft to rotate, achieving the output of motor speed. With the above coordination, the manufacturer can change the transmission ratio between the motor rotor and the motor shaft by adjusting the tooth ratio between the sun gear 1, the limiting cylinder 2, and the planetary gears 3, thereby increasing the motor rotor speed and motor efficiency while ensuring the motor shaft speed remains constant.

[0042] Example 2. Dryer motor, configured as follows: Figure 3-4 As shown, it includes a motor stator 6, a motor rotor 7, and a motor shaft. The motor stator 6, the motor rotor 7, and the motor shaft are externally connected to a speed regulating mechanism for a clothes dryer motor as described in Embodiment 1.

[0043] The inner side of the motor stator 6 is fastened to the limiting block 202 of the limiting cylinder 2 via a limiting groove, the middle part of the motor rotor 7 is screwed to the sun gear 1, and the external transmission of the motor shaft is connected to the drive disk 4.

[0044] It also includes a limiting screw installed on the dryer motor housing. After the limiting cylinder 2 is installed, the limiting screw limits the axial movement of the limiting cylinder 2, thereby preventing the limiting cylinder 2 from moving axially after assembly.

[0045] This embodiment limits the installation structure of the speed control mechanism for the dryer motor, allowing the speed control mechanism for the dryer motor in Embodiment 1 to be directly integrated into the dryer motor, and reducing the occupation of the radial and axial space of the dryer motor, thereby improving motor efficiency while reducing the amount of space occupied inside the dryer.

[0046] Example 3. A speed control mechanism for a clothes dryer motor, configured as follows: Figure 5 As shown, the device includes two sets of clutch speed control units connected in sequence. Each set of clutch speed control units includes a sun gear 1 and a limiting cylinder 2 arranged in an inner and outer nested and coaxial configuration. The sun gear 1 and the limiting cylinder 2 are respectively provided with a first gear disk 101 and a second gear disk 201. The sun gear 1 and the limiting cylinder 2 are connected to each other via planetary gears 3. The two sides of the planetary gears 3 are respectively meshed with the first gear disk 101 and the second gear disk 201. A drive disk 4 is connected to the outside of the planetary gears 3. The sun gear 1 is used to drive the planetary gears 3 to rotate after rotation. The limiting cylinder 2 is used to circumferentially limit the planetary gears 3. The planetary gears 3 are used to form circumferential rotation under the control of the sun gear 1 and the limiting cylinder 2 and drive the drive disk 4 to rotate around the axis of the motor shaft.

[0047] The sun gear 1 and the limiting cylinder 2 are connected to each other via bearings, and the drive disk 4 and the sun gear 1 are nested together and connected to each other via bearings.

[0048] One set of clutch speed control units has its sun gear 1 externally connected to the motor rotor. The drive disc 4 of the clutch speed control unit is externally connected to the sun gear 1 of another set of clutch speed control units. The middle part of the drive disc 4 of the other set of clutch speed control units is connected to the motor shaft via a spline hole.

[0049] The drive disk 4, which connects to the motor shaft, has a T-shaped cross-section. One end of the drive disk 4 is located on the radial inner side of the sun gear 1 and is connected to the sun gear 1 of the two sets of clutch speed regulating units through bearings. The other end of the drive disk 4 extends to the outer side of the mounting groove 5 and is rotatably connected to the planetary gear 3 of the same set of clutch speed regulating units via a pin.

[0050] The external connection of the limiting cylinder 2 is to the motor stator, and a circumferential limit is formed through the motor stator.

[0051] The limiting cylinder 2 has several limiting blocks 202 arranged in a ring around its outer surface. The limiting blocks 202 are used to fasten and connect the motor stator and form a circumferential limit between the limiting cylinder 2 and the motor stator. Several clamping plates are arranged in a ring around the end of the limiting cylinder 2. The clamping plates and the limiting blocks 202 are staggered with each other. After the limiting cylinder 2 is installed, the clamping plates fit against the side of the motor stator, thereby realizing the axial positioning between the limiting cylinder 2 and the motor stator.

[0052] The sun gear 1 and the limiting cylinder 2 are nested together to form a mounting groove 5 for accommodating the planet gears 3. The planet gears 3 are multiple and arranged in a ring within the mounting groove 5. The planet gears 3 are externally connected to the drive disk 4.

[0053] The inner side of the limiting cylinder 2 is fixedly connected to a sealing ring located outside the mounting groove 5, and the inner ring of the sealing ring is in contact with the outer wall of the drive disk 4.

[0054] Compared to Embodiment 1, this embodiment features a dual-clutch structure. In operation, the motor rotor drives the sun gear 1 of the first clutch speed control unit to rotate. The sun gear 1, in conjunction with the limiting cylinder 2, drives the planetary gear 3, causing the drive disc 4 of the first clutch speed control unit to rotate. After rotating, the drive disc 4 then drives the sun gear 1 of the second clutch speed control unit to rotate synchronously. The second clutch speed control unit controls its drive disc 4 to rotate in the same manner, thereby achieving control and drive of the motor shaft. With the above coordination, this embodiment can achieve two-stage speed regulation of the motor shaft through the cooperation of the two clutch speed control units, thus expanding the adjustment range of its transmission ratio.

[0055] Based on this, designers can also stack three or more different clutch speed control units in the same way to form a multi-clutch structure, thereby further improving the functionality and speed control effect of the dryer motor.

[0056] Example 4. A clothes dryer motor, configured as follows: Figure 6-7 As shown, it includes a motor stator 6, a motor rotor 7, and a motor shaft. The motor stator 6, the motor rotor 7, and the motor shaft are externally connected to a speed regulating mechanism for a clothes dryer motor as described in Embodiment 3.

[0057] The inner side of the motor stator 6 is simultaneously connected to the limiting cylinder 2 of the two clutch speed regulation units via the limiting groove. The middle part of the motor rotor 7 is screwed to the sun gear 1 of the first clutch speed regulation unit. The external transmission of the motor shaft is connected to the drive disk 4 of the second clutch speed regulation unit.

[0058] It also includes a limiting screw installed on the dryer motor housing. After the limiting cylinder 2 is installed, the limiting screw limits the axial movement of the limiting cylinder 2, thereby preventing the limiting cylinder 2 from moving axially after assembly.

[0059] This embodiment limits the installation structure of the speed control mechanism for the dryer motor, allowing the speed control mechanism for the dryer motor in Embodiment 3 to be directly integrated into the dryer motor, thereby realizing the multi-level speed control function of the dryer motor.

[0060] Example 5. The motor rotor is configured as follows: Figure 8 As shown, the motor rotor can be used as the motor rotor in Embodiments 2 and 4. The motor rotor includes a rotor core 701. Several first magnets 702 and second magnets 703 are distributed in a ring around the rotor core 701. The first magnets 702 and second magnets 703 are alternately distributed. The magnetic poles of adjacent second magnets 703 are opposite, that is, the second magnets 703 on both sides of each first magnet 702 are N pole and S pole, respectively. The magnetic field direction of the first magnet 702 is radial, and the magnetic field direction of the second magnet 703 is perpendicular to the radial direction, that is, tangent to the magnetic field direction of the adjacent first magnet 702.

[0061] This embodiment limits the arrangement of magnets inside the motor rotor, enabling the second magnet 703 to form a ring magnetic field after installation, thereby making the magnetic field distribution of the motor more uniform and improving the motor efficiency.

[0062] Example 6. The motor rotor is configured as follows: Figure 9As shown, the motor rotor can be used as the motor rotor in Embodiments 2 and 4. The motor rotor includes a rotor core 701. Several first magnets 702 and second magnets 703 are distributed in a ring around the rotor core 701. The first magnets 702 and second magnets 703 are alternately distributed. The magnetic poles of adjacent second magnets 703 are opposite, that is, the second magnets 703 on both sides of each first magnet 702 are N pole and S pole, respectively. The magnetic field direction of the first magnet 702 is radial, and the magnetic field direction of the second magnet 703 is perpendicular to the radial direction, that is, tangent to the magnetic field direction of the adjacent first magnet 702.

[0063] The second magnet 703 includes two magnets arranged separately. The two magnets have the same magnetic poles and are respectively connected to two adjacent first magnets 702. Each first magnet 702 is glued to the magnets on both sides to form a magnet group. The magnets in adjacent magnet groups are separated from each other by a partition 704. The outside of the partition 704 is connected to the rotor core 701.

[0064] The first magnet 702 and the second magnet 703 have the same thickness and extend radially to the inner side of the partition.

[0065] Compared to Example 6, the optimized arrangement of the second magnet 703 in this example further enhances the magnetic field strength of the second magnet 703 after installation. Furthermore, by optimizing the magnet installation structure, during installation, a first magnet 702 and two magnetic blocks are first glued together to form a magnet assembly. Then, the magnet assembly is glued and inserted into adjacent partitions on the rotor core 701 via a plug-in method. This combination effectively mitigates the repulsion caused by the repulsion between adjacent magnetic blocks during insertion, thus ensuring the installation stability of each magnet assembly.

Claims

1. A speed regulating mechanism for a clothes dryer motor, characterized in that: It includes one or more clutch speed control units, which are connected in sequence. The clutch speed control unit includes a sun gear (1) and a limiting cylinder (2). The sun gear (1) and the limiting cylinder (2) are respectively provided with a first gear plate (101) and a second gear plate (201). The sun gear (1) and the limiting cylinder (2) are connected to each other via planetary gears (3). The two sides of the planetary gears (3) are respectively meshed with the first gear plate (101) and the second gear plate (201). A drive disk (4) is connected to the outside of the planetary gears (3). The sun gear (1) is used to drive the planetary gears (3) to rotate after rotation. The limiting cylinder (2) is used to limit the planetary gears (3) circumferentially. The planetary gears (3) are used to form circumferential rotation under the control of the sun gear (1) and the limiting cylinder (2) and drive the drive disk (4) to rotate.

2. The speed regulating mechanism for a clothes dryer motor according to claim 1, characterized in that: The external connection of the sun gear (1) is the motor rotor or the drive disk (4) of the adjacent clutch speed regulating unit, and the external connection of the drive disk (4) is the motor shaft or the sun gear (1) of the adjacent clutch speed regulating unit.

3. The speed regulating mechanism for a clothes dryer motor according to claim 1, characterized in that: The limiting cylinder (2) is externally connected to the motor stator and forms a circumferential limit through the motor stator.

4. The speed regulating mechanism for a clothes dryer motor according to claim 3, characterized in that: The limiting cylinder (2) has several limiting blocks (202) arranged in a ring around its exterior. The limiting blocks (202) are used to fasten and connect the motor stator and form a circumferential limit between the limiting cylinder (2) and the motor stator.

5. The speed regulating mechanism for a clothes dryer motor according to claim 1, characterized in that: The sun gear (1) and the limiting cylinder (2) are nested together to form an installation groove (5). The number of planet gears (3) is multiple and they are distributed in a ring in the installation groove (5). The planet gears (3) are externally connected to the drive disk (4).

6. A dryer motor, comprising a motor stator (6), a motor rotor (7), and a motor shaft, characterized in that: The external connections of the motor stator (6), motor rotor (7) and motor shaft are provided with a speed regulating mechanism for a dryer motor as described in any one of claims 1-5.

7. The dryer motor according to claim 6, characterized in that: The clutch speed control unit in the speed control mechanism of the dryer motor is a set. The motor stator (6) is connected to the limiting cylinder (2) and the middle part of the motor rotor (7) is fixedly connected to the sun gear (1). The external transmission of the motor shaft is connected to the drive disk (4).

8. The dryer motor according to claim 6, characterized in that: The speed control mechanism of the dryer motor has multiple clutch speed control units. The motor stator (6) is connected to the limiting cylinder (2) of any clutch speed control unit. The middle part of the motor rotor (7) is fixedly connected to the sun gear (1) of any clutch speed control unit. The external part of the motor shaft is connected to the drive disc (4) of any clutch speed control unit.

9. The dryer motor according to claim 6, characterized in that: The motor rotor (7) includes a rotor core (701). Several first magnets (702) and second magnets (703) are arranged in a ring around the rotor core (701). The first magnets (702) and second magnets (703) are arranged alternately. The magnetic poles of adjacent second magnets (703) are opposite. The magnetic field direction of the first magnets (702) is radial, and the magnetic field direction of the second magnets (703) is perpendicular to the radial direction.

10. The dryer motor according to claim 9, characterized in that: The second magnet (703) includes two magnetic blocks arranged separately. The two magnetic blocks are respectively connected to two adjacent first magnets (702). The first magnets (702) and the magnetic blocks are glued to each other. The two magnetic blocks are separated from each other by a partition (704). The outside of the partition (704) is connected to the rotor core (701).

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