Direct current motor and power system for clothes airing machine

Abstract

The invention aims to provide a direct current motor and a power system for a clothes airing machine, the power system comprises a retracting and releasing device, the retracting and releasing device comprises a worm, a transmission gear set, a reel and a pressing plate, and the reel can be driven to rotate through a motor, so that ascending and descending of the clothes airing machine are realized; the resistance meeting mechanism comprises a guide plate and a first microswitch, a motor can be stopped when the clothes airing machine runs in a hindering mode, and safety is guaranteed; the limiting mechanism comprises a gear ring, a pawl, a knob and a second microswitch and can limit ascending and descending of the clothes airing machine, so that the practicability of the clothes airing machine is improved; the cleaning device comprises a friction plate and a brush and can supplement lubricating oil to the steel wire rope through the lubricating oil in the friction plate in the friction process of the steel wire rope and the friction plate, so that the service life of the steel wire rope is prolonged, rusting is prevented, the surface of the steel wire rope can be kept clean, stains are prevented from entering a power system, and faults of the power system are prevented.

Description

Technical Field

[0001] The present invention relates to the field of direct current motors, and in particular to a direct current motor and a power system for a clothes drying machine. Background Art

[0002] Existing clothes drying machines all use DC motors as power sources to drive the power system. However, during the use of the clothes drying machine, the DC motor in the clothes drying machine is most likely to be damaged when an event such as overload, overload, lightning strike, etc. occurs. Therefore, replacing and repairing the DC motor is a common method for repairing the clothes drying machine. However, the power system of the existing clothes drying machine often uses an upper and lower shell for sealing and fixing, so that the winding wheel and the motor are fixed in the shell. However, it also makes it very inconvenient to replace the motor, requiring a large range of disassembly, which greatly prolongs the maintenance time for replacing and repairing the DC motor and increases the difficulty of maintenance.

[0003] For example, the DC lifting motor, power system and clothes drying system for a clothes drying machine proposed in CN202010106234.X include a DC motor assembly and a brake assembly powered by DC power, the DC motor assembly including a housing, a motor shaft, a stator, a rotor core and a rotor winding, the brake assembly including a static brake pad, a dynamic brake pad and a reset spring located in the housing; the dynamic brake pad can rotate with the motor shaft and can move axially along the motor shaft. When the motor is working, the rotor winding is energized to generate a magnetic field on the end face of the rotor core to attract the dynamic brake pad, so that the static brake pad is separated from the dynamic brake pad structure; when the motor loses power, the magnetic field of the rotor core disappears, and under the action of the reset spring, the dynamic brake pad fits with the static brake pad to generate friction to achieve braking; the DC lifting motor has a simple structure, which can not only prevent the inertial rotation of the motor, but also prevent the clothes drying rack from continuing to move downward under the load when the motor loses power, but does not solve the above-mentioned problems.

[0004] The present invention can fix the motor by means of the fixing plate to ensure stable operation of the motor, and can also quickly disassemble the motor by means of the snap-on fixing plate, thereby reducing the difficulty of replacing and repairing the DC motor and shortening the repair time. Summary of the invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide a DC motor and power system for a clothes drying machine. The DC motor and power system for the clothes drying machine can fix the motor through a fixed plate to ensure stable operation of the motor. At the same time, the motor can be quickly disassembled through a snap-on fixed fixing plate, thereby reducing the difficulty of replacing and repairing the DC motor and shortening the repair time.

[0006] The present invention provides a DC motor for a clothes drying machine, comprising a first end cover, a shell, a second end cover, a rotating shaft, a rotor assembly, a commutator, a carbon brush, a conductive sheet, a stator assembly and a fan blade. The first end cover and the second end cover are arranged on both sides of the shell, a cover plate is arranged at the end of the first end cover, bolts are arranged on the cover plate to connect the first end cover, the shell and the second end cover, the rotating shaft is rotatably installed on the cover plate and the second end cover, the rotor assembly and the commutator are fixed on the rotating shaft, a plurality of spaced contact sheets are arranged on the commutator, and the rotor assembly is provided with a coil, which is conductively connected to the commutator through a wire. The contact piece on the commutator, the carbon brush is slidably installed on the first end cover, located on both sides of the commutator, and is in conductive contact with the commutator. The first end cover is provided with a slideway that fits the carbon brush, and a sealing cover is provided at the end of the slideway. The sealing cover is connected to the carbon brush through a spring. The conductive sheet is fixed on the first end cover, and the lower end of the conductive sheet is fixed in the slideway of the first end cover and is in conductive contact with the carbon brush. The stator assembly is an arc-shaped permanent magnet, which is arranged on the inner side of the shell and located on both sides of the rotor assembly. The fan blades are arranged at both ends of the rotating shaft, and the first end cover and the second end cover are provided with heat dissipation holes corresponding to the fan blades.

[0007] Furthermore, the stator assembly includes a silicon steel sheet and a stator coil, the silicon steel sheet is arc-shaped, a bayonet is provided on the outside of the silicon steel sheet, a tenon is provided on the inside of the shell, the stator coil is wound around the silicon steel sheet, a conductive sheet is provided on the second end cover, and the stator coil is conductively connected to the conductive sheet on the second end cover.

[0008] The present invention also provides a power system for a clothes drying machine, comprising the above-mentioned DC motor, and also comprising a fixing device arranged on the outside of the motor, which can fix the motor to ensure normal use of the motor while allowing the motor to be quickly disassembled; a retractable device arranged on both sides of the fixing device, which can make the clothes drying machine go up and down through the motor; an obstruction mechanism arranged on the outside of the retractable device, which can stop the motor when the clothes drying machine encounters an obstacle during operation to ensure safety; a limiting mechanism arranged above the fixing device, which can limit the upward and downward movement of the clothes drying machine, thereby increasing the practicality of the clothes drying machine; a cleaning device arranged on both sides of the fixing device, which can clean the wire rope.

[0009] Furthermore, the fixing device includes a first shell, a second shell and a fixing plate. A mounting hole is provided at the bottom of the first shell for fixing it on the clothes drying machine. A clamping position for installing the motor is provided on the first shell. A conductive plate is provided on the first shell. The second shell is provided above the first shell. An opening that fits the motor is opened on the second shell. The fixing plate is rotatably installed above the second shell, and the fixing plate fits the opening on the second shell.

[0010] Furthermore, a rib is provided on the inner side of the fixing plate, the rib fits the shape of the motor, and the end of the fixing plate is connected to the first shell by a buckle.

[0011] Furthermore, the retracting and releasing device includes a worm, a transmission gear set, a winding wheel and a pressure plate. The worm is installed at both ends of the rotating shaft of the DC motor, and the winding wheel is rotatably installed at both ends of the first shell. The winding wheel is dynamically connected to the worm through the transmission gear set. The transmission gear set is all helical gears. The pressure plate is rotatably installed on the first shell and is located on the side of the winding wheel. A torsion spring is provided between the pressure plate and the first shell, and the end of the pressure plate is in contact with the wire rope on the winding wheel.

[0012] Furthermore, the resistance mechanism includes a guide plate and a first micro switch. The guide plate is rotatably mounted on the first shell. A torsion spring is provided in the middle of the guide plate and connected to the first shell. A guide wheel is rotatably mounted at the end of the guide plate. The first micro switch is fixed on the first shell and is located below the guide plate.

[0013] Furthermore, the limiting mechanism includes a ring gear, a ratchet, a knob and a second micro switch. The ring gear is rotatably installed on both sides above the second shell and is connected to the winding wheel through a reduction gear group. A ratchet and a knob are rotatably provided above the ring gear, and the second micro switch is arranged on one side of the ring gear.

[0014] Furthermore, a ratchet is provided inside the gear ring and is connected to a pawl via the ratchet, the knob is fixedly connected to the pawl, and a protruding rod is provided on the outside of the knob.

[0015] Furthermore, the cleaning device includes a friction plate and a brush, which are fixed at both ends of the first shell. The first shell and the second shell are provided with corresponding slots. The friction plate is located outside the brush. The friction plate is provided with inclined and evenly distributed friction patterns. The friction plate is made of flexible materials including sponges that can absorb lubricating oil.

[0016] Beneficial effects: 1. A slideway that fits the carbon brush is provided on the first end cover, and a sealing cover is provided at the end of the slideway. The sealing cover is connected to the carbon brush through a spring. The carbon brush of the motor can be quickly replaced by opening the sealing cover, thereby repairing the motor more quickly.

[0017] 2. The fan blades are arranged at both ends of the rotating shaft. The first end cover and the second end cover are provided with heat dissipation holes corresponding to the fan blades. The rotation of the fan blades can accelerate the flow of airflow inside the motor, and dissipate heat through the heat dissipation holes on the first end cover and the second end cover, thereby maintaining the motor, ensuring long-term operation of the motor, and reducing overheating damage to the motor.

[0018] 3. The winding wheel is connected to the worm power through a transmission gear set. The transmission gear set is all helical gears. The helical gear transmission reduces the operating noise between the gears, thereby reducing the overall noise of the clothes dryer. At the same time, through the transmission between the worm and the helical gear, the dynamic self-locking of the clothes dryer is achieved when the motor stops accidentally, ensuring the safe use of the clothes dryer.

[0019] 4. A conductive plate is provided on the first shell, the second shell is provided above the first shell, an opening that fits the motor is opened on the second shell, a fixed plate is rotatably installed above the second shell, the fixed plate fits the opening on the second shell, a rib is provided on the inner side of the fixed plate, the rib fits the shape of the motor, the end of the fixed plate is connected to the first shell by a buckle, the motor can be fixed by the fixed plate provided, and the stable operation of the motor can be ensured. At the same time, the motor can be quickly disassembled by the fixed plate fixed by the buckle, thereby reducing the difficulty of replacing and repairing the DC motor and shortening the repair time.

[0020] 5. A torsion spring is provided in the middle of the guide plate and connected to the first shell. A guide wheel is rotatably installed at the end of the guide plate. The first micro switch is fixed on the first shell and is located below the guide plate. The state of the wire rope can be detected through the guide plate and the first micro switch, so that when the clothes drying machine encounters an obstacle, the motor will be stopped to prevent danger.

[0021] 6. The second micro switch is arranged on one side of the gear ring. A ratchet is arranged inside the gear ring and is connected to the pawl through the ratchet. The knob is fixedly connected to the pawl. A convex rod is arranged on the outer side of the knob. The knob can cooperate with the second switch to realize the upward and downward limit of the clothes drying machine, thereby improving the practicality of the clothes drying machine.

[0022] 7. The friction plate and the brush are fixed at both ends of the first housing. The friction plate is located outside the brush. The friction plate is provided with inclined uniformly distributed friction patterns. The friction plate is made of flexible materials including sponges that can absorb lubricating oil. During the friction between the steel wire rope and the friction plate, the lubricating oil in the friction plate is used to replenish the lubricating oil of the steel wire rope, thereby increasing the service life of the steel wire rope and preventing rust. It can also keep the surface of the steel wire rope clean and prevent stains from entering the power system, thereby preventing power system failure.

[0023] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The overall structure of the power system of the present invention is shown in FIG. Figure 1 .

[0025] Figure 2 The overall structure of the power system of the present invention is shown in FIG. Figure 2 .

[0026] Figure 3 It is an exploded diagram of the power system of the present invention.

[0027] Figure 4 It is a schematic diagram of the overall structure of the DC motor of the present invention.

[0028] Figure 5It is an exploded view of the DC motor of the present invention.

[0029] Figure 6 is a cross-sectional view of a first end cap of the present invention.

[0030] Figure 7 is an exploded view of the stator assembly of the present invention.

[0031] Figure 8 It is a schematic diagram of the overall structure of the first shell of the present invention.

[0032] Fig. 9 It is a schematic diagram of the overall structure of the retractable device of the present invention.

[0033] Fig.10 The explosion of the limiting mechanism of the present invention Figure 1 .

[0034] Fig.11 The explosion of the limiting mechanism of the present invention Figure 2 .

[0035] Figure numerals: first end cover 1; shell 2; second end cover 3; cover plate 4; rotating shaft 5; rotor assembly 6; commutator 7; fan blades 8; carbon brush 9; spring 10; sealing cover 11; conductive sheet 12; stator assembly 13; first shell 14; second shell 15; fixing plate 16; worm 17; transmission gear set 18; winding wheel 19; pressure plate 20; guide plate 21; guide wheel 22; first micro switch 23; ring gear 24; ratchet 25; knob 26; second micro switch 27; reduction gear set 28; conductive plate 29; friction plate 30; brush 31. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0037] Hereinafter, a DC motor and a power system for a clothes drying machine according to an embodiment of the present invention will be described with reference to the accompanying drawings. Figure 1 - Fig.11As shown, the DC motor for the clothes drying machine includes a first end cover 1, a housing 2, a second end cover 3, a rotating shaft 5, a rotor assembly 6, a commutator 7, a carbon brush 9, a conductive sheet 12, a stator assembly 13 and a fan blade 8. The first end cover 1 and the second end cover 3 are arranged on both sides of the housing 2. A cover plate 4 is arranged at the end of the first end cover 1. Bolts are arranged on the cover plate 4 to connect the first end cover 1, the housing 2 and the second end cover 3. The rotating shaft 5 is rotatably mounted on the cover plate 4 and the second end cover 3. The rotor assembly 6 and the commutator 7 are fixed on the rotating shaft 5. The commutator 7 is provided with a plurality of spaced contact sheets. The rotor assembly 6 is provided with a coil, and the coil is conductively connected to the commutator 7 through a wire. The carbon brush 9 is slidably mounted on the first end cover 1, located on both sides of the commutator 7, and is in conductive contact with the commutator 7. The first end cover 1 is provided with a slideway that fits the carbon brush 9, and a sealing cover 11 is provided at the end of the slideway. The sealing cover 11 is connected to the carbon brush 9 through a spring 10. The conductive sheet 12 is fixed on the first end cover 1, and the lower end of the conductive sheet 12 is fixed in the slideway of the first end cover 1 and is in conductive contact with the carbon brush 9. The stator assembly 13 is an arc-shaped permanent magnet, which is arranged on the inner side of the shell 2 and located on both sides of the rotor assembly 6. The fan blades 8 are arranged at both ends of the rotating shaft 5. The first end cover 1 and the second end cover 3 are provided with heat dissipation holes corresponding to the fan blades 8.

[0038] Preferably, the stator assembly 13 includes a silicon steel sheet and a stator coil. The silicon steel sheet is arc-shaped, a bayonet is provided on the outside of the silicon steel sheet, and a tenon is provided on the inside of the shell 2 for fixing the silicon steel sheet. The stator coil is wound around the silicon steel sheet, and a conductive sheet 12 is provided on the second end cover 3. The stator coil is conductively connected to the conductive sheet 12 on the second end cover 3.

[0039] In a specific embodiment, the conductive sheet 12 is connected to an external circuit, so that the rotor assembly 6 is energized and generates magnetic force, thereby generating a repulsive force with the stator assembly 13 to drive the rotating shaft 5 to rotate.

[0040] The rotor assembly 6 will also generate heat after being energized. At the same time, the rotation of the shaft 5 drives the fan blades 8 to rotate, thereby accelerating the flow of airflow inside the motor and exchanging airflow through the heat dissipation holes on the first end cover 1 and the second end cover 3, thereby dissipating the heat of the DC motor and reducing overheating damage to the DC motor.

[0041] like Figure 2 , Figure 3 , Figure 8 and Fig.11As shown, the power system for the clothes drying machine includes a fixing device, which includes a first shell 14, a second shell 15 and a fixing plate 16. A mounting hole is provided at the bottom of the first shell 14 for fixing to the clothes drying machine. A clamping position for installing a motor is provided on the first shell 14. A conductive plate 29 is provided on the first shell 14. The second shell 15 is provided above the first shell 14. An opening that fits the motor is opened on the second shell 15. The fixing plate 16 is rotatably installed above the second shell 15. The fixing plate 16 fits the opening on the second shell 15. A rib is provided on the inner side of the fixing plate 16. The rib fits the shape of the motor. The end of the fixing plate 16 is connected to the first shell 14 by a snap.

[0042] In a specific embodiment: the conductive plate 29 is connected to an external power source through a wire and a connecting plug, and the motor is installed on a snap-in position on the first shell 14, so that the conductive sheet 12 on the motor is conductively connected to the conductive plate 29 on the first shell 14, and then the fixing plate 16 is rotated so that the fixing plate 16 is connected to the first shell 14 through a snap, so that the motor is fixed through the snap-in position on the first shell 14 and the ribs on the fixing plate 16.

[0043] like Figure 3 , Figure 8 and Fig. 9 As shown, the power system for the clothes drying machine includes a retractable device, which includes a worm 17, a transmission gear set 18, a winding wheel 19 and a pressure plate 20. The worm 17 is installed at both ends of the rotating shaft 5 of the DC motor. The winding wheel 19 is rotatably installed at both ends of the first housing 14. The winding wheel 19 is power-connected to the worm 17 through the transmission gear set 18. The transmission gear set 18 is a helical gear. The pressure plate 20 is rotatably installed on the first housing 14 and is located on the side of the winding wheel 19. A torsion spring is provided between the pressure plate 20 and the first housing 14, and the end of the pressure plate 20 contacts the wire rope on the winding wheel 19.

[0044] In a specific embodiment: when in use, the worm 17 is driven to rotate by the forward or reverse rotation of the DC motor, thereby driving the winding wheel 19 to rotate through the transmission gear set 18, so that the wire rope on the winding wheel 19 is loosened or tightened (when the winding wheel 19 at one end is loosened, the winding wheel 19 at the other end is tightened).

[0045] When the winding wheel 19 tightens the wire rope, the pressure plate 20 presses the wire rope under the action of the torsion spring, so that the wire rope is wound on the winding wheel 19 in an orderly manner to prevent stacking out of order. When the winding wheel 19 loosens the wire rope, the pressure plate 20 presses the wire rope under the action of the torsion spring, so that the wire rope is close to the winding wheel 19 to prevent it from loosening.

[0046] During the operation of the retracting and unwinding device, if the motor suddenly stops running, the steel wire rope will drive the winding wheel 19 to rotate under the pull of the heavy object below, thereby causing the transmission gear set 18 to rotate. However, due to the connection between the transmission gear set 18 and the worm 17, the transmission gear set 18 cannot rotate (the transmission between the worm 17 and the helical gear is a one-way transmission, that is, the worm 17 can drive the helical gear to rotate, but the helical gear cannot drive the worm 17 to rotate), so that the steel wire rope cannot continue to be pulled downward, thereby realizing the dynamic self-locking of the clothes drying machine.

[0047] like Figure 8 and Fig. 9 As shown, the power system for the clothes drying machine includes an obstruction mechanism, which includes a guide plate 21 and a first micro switch 23. The guide plate 21 is rotatably mounted on the first housing 14. A torsion spring is provided in the middle of the guide plate 21 to connect with the first housing 14. A guide wheel 22 is rotatably mounted at the end of the guide plate 21. The first micro switch 23 is fixed on the first housing 14 and is located below the guide plate 21.

[0048] In a specific embodiment: when in use, the first micro switch 23 is connected to the external control device through a wire, and the wire rope passes through the top of the guide wheel 22, so that the guide plate 21 rotates and compresses the torsion spring. When the clothes drying machine encounters an obstacle, the wire rope at one end will be loosened, so that the guide plate 21 is reset under the action of the torsion spring, so that one end of the guide plate 21 presses the first micro switch 23, thereby sending an obstruction signal, so that the motor stops rotating.

[0049] like Figure 1 , Fig.10 and Fig.11 As shown, the power system of the clothes drying machine includes a limiting mechanism, which includes a ring gear 24, a pawl 25, a knob 26 and a second micro switch 27. The ring gear 24 is rotatably installed on both sides above the second shell 15, and is connected to the winding wheel 19 through a reduction gear set 28. A pawl 25 and a knob 26 are rotatably provided above the ring gear 24. The second micro switch 27 is provided on one side of the ring gear 24. A ratchet is provided inside the ring gear 24 and is connected to the pawl 25 through the ratchet. The knob 26 is fixedly connected to the pawl 25, and a convex rod is provided on the outer side of the knob 26.

[0050] In a specific embodiment: when in use, the second micro switch 27 is connected to an external control device through a wire, and the winding wheel 19 rotates to drive the gear ring 24 to rotate, so that the protruding rod on the knob 26 touches the second micro switch 27, and the second micro switch 27 sends a signal to stop the motor, thereby limiting the position.

[0051] During adjustment, the knob 26 is rotated in one direction to drive the ratchet 25 to rotate in the gear ring 24, thereby changing the relative position of the protruding rod and the gear ring 24, thereby limiting the upward and downward movement of the clothes drying machine.

[0052] like Figure 3 and Figure 8 As shown, the power system for the clothes drying machine includes a cleaning device, which includes a friction plate 30 and a brush 31. The friction plate 30 and the brush 31 are fixed to both ends of the first shell 14. The first shell 14 and the second shell 15 are provided with corresponding slots. The friction plate 30 is located on the outside of the brush 31, and the friction plate 30 is provided with inclined and evenly distributed friction patterns.

[0053] In a specific embodiment: after long-term use, the lubricating oil on the wire rope is easily contaminated with external dust impurities, thus forming stains that are difficult to remove. When the power system is in use, the steel wire rope is in a taut state, so that the steel wire rope rubs against the friction plate 30 when it moves, thereby removing the stains on the steel wire rope by friction, and then the brush 31 will brush and clean the steel wire rope.

[0054] At the same time, due to the function of the retracting and releasing device, the steel wire rope will move left and right when tightening and loosening, thereby avoiding long-term friction with the same position of the friction plate 30 and the brush 31, thereby increasing the service life.

[0055] Preferably, the friction plate 30 is made of a flexible material including a sponge that can absorb lubricating oil, and a certain amount of lubricating oil is absorbed and stored in the friction plate 30, so that during the friction between the wire rope and the friction plate 30, the lubricating oil in the friction plate 30 is used to replenish the lubricating oil in the wire rope, thereby increasing the service life of the wire rope and preventing rust. It can also keep the surface of the wire rope clean and prevent stains from entering the power system, thereby preventing power system failure.

[0056] Working principle: the conductive plate 29 is connected to the external power supply through a wire and a connecting plug, and the motor is installed on the card position on the first shell 14, so that the conductive sheet 12 on the motor is conductively connected to the conductive plate 29 on the first shell 14, and then the fixing plate 16 is rotated so that the fixing plate 16 is connected to the first shell 14 through a buckle, so that the motor is fixed by the card position on the first shell 14 and the rib plate on the fixing plate 16, and then the conductive sheet 12 is connected to the external circuit, so that the rotor assembly 6 is energized and generates magnetic force, thereby generating a repulsive force with the stator assembly 13 to drive the rotating shaft 5 to rotate, and then the worm 17 is driven to rotate by the forward or reverse rotation of the DC motor, thereby driving the winding wheel 19 to rotate through the transmission gear set 18, so that the wire rope on the winding wheel 19 is loosened or tightened, and then the wire rope is in a taut state, so that the wire rope rubs against the friction plate 30 when it moves, so that the stains on the wire rope are removed by friction, and then the brush 31 will brush and clean the wire rope again.

Claims

1. A DC motor for a clothes drying machine, comprising a first end cover (1), a housing (2), a second end cover (3), a rotating shaft (5), a rotor assembly (6), a commutator (7), a carbon brush (9), a conductive sheet (12), a stator assembly (13) and a fan blade (8), characterized in that: The first end cover (1) and the second end cover (3) are arranged on both sides of the housing (2); a cover plate (4) is arranged at the end of the first end cover (1); bolts are arranged on the cover plate (4) to connect the first end cover (1), the housing (2) and the second end cover (3); a rotating shaft (5) is rotatably mounted on the cover plate (4) and the second end cover (3); a rotor assembly (6) and a commutator (7) are fixed on the rotating shaft (5); a plurality of spaced contact pieces are arranged on the commutator (7); a coil is arranged on the rotor assembly (6); the coil is electrically connected to the contact pieces on the commutator (7) through a wire; a carbon brush (9) is slidably mounted on the first end cover (1) and is located on both sides of the commutator (7); The first end cover (1) is provided with a slideway that fits the carbon brush (9), and a sealing cover (11) is provided at the end of the slideway. The sealing cover (11) is connected to the carbon brush (9) through a spring (10). The conductive sheet (12) is fixed to the first end cover (1), and the lower end of the conductive sheet (12) is fixed in the slideway of the first end cover (1) and is in conductive contact with the carbon brush (9). The stator assembly (13) is an arc-shaped permanent magnet, which is arranged on the inner side of the housing (2) and located on both sides of the rotor assembly (6). The fan blades (8) are arranged at both ends of the rotating shaft (5). The first end cover (1) and the second end cover (3) are provided with heat dissipation holes corresponding to the fan blades (8). The stator assembly (13) comprises a silicon steel sheet and a stator coil, the silicon steel sheet is arc-shaped, a bayonet is provided on the outer side of the silicon steel sheet, a tenon is provided on the inner side of the housing (2), the stator coil is wound on the silicon steel sheet, a conductive sheet (12) is provided on the second end cover (3), and the stator coil is conductively connected to the conductive sheet (12) on the second end cover (3).

2. A power system for a clothes drying machine, comprising the DC motor according to claim 1, characterized in that: It also includes a fixing device arranged on the outside of the motor; a retractable device arranged on both sides of the fixing device; an obstruction mechanism arranged on the outside of the retractable device; a limiting mechanism arranged above the fixing device; and a cleaning device arranged on both sides of the fixing device.

3. A power system for a clothes drying machine as claimed in claim 2, characterized in that: The fixing device comprises a first shell (14), a second shell (15) and a fixing plate (16); a mounting hole is provided below the first shell (14) for fixing the clothes drying machine; a clamping position for mounting a motor is provided on the first shell (14); a conductive plate (29) is provided on the first shell (14); the second shell (15) is arranged above the first shell (14); an opening is provided on the second shell (15) for fitting with the motor; the fixing plate (16) is rotatably mounted above the second shell (15); the fixing plate (16) fits with the opening on the second shell (15).

4. A power system for a clothes drying machine as claimed in claim 3, characterized in that: The fixing plate (16) is provided with a rib plate on the inner side, the rib plate fits the shape of the motor, and the end of the fixing plate (16) is connected to the first housing (14) via a buckle.

5. A power system for a clothes drying machine as claimed in claim 2, characterized in that: The retractable device comprises a worm (17), a transmission gear set (18), a winding wheel (19) and a pressure plate (20), wherein the worm (17) is mounted on both ends of a rotating shaft (5) of a DC motor, the winding wheel (19) is rotatably mounted on both ends of a first housing (14), the winding wheel (19) is power-connected to the worm (17) via the transmission gear set (18), the transmission gear set (18) is a helical gear, the pressure plate (20) is rotatably mounted on the first housing (14) and is located on the side of the winding wheel (19), a torsion spring is provided between the pressure plate (20) and the first housing (14), and the end of the pressure plate (20) contacts the steel wire rope on the winding wheel (19).

6. A power system for a clothes drying machine as claimed in claim 2, characterized in that: The resistance mechanism comprises a guide plate (21) and a first micro switch (23); the guide plate (21) is rotatably mounted on the first housing (14); a torsion spring is provided in the middle of the guide plate (21) and connected to the first housing (14); a guide wheel (22) is rotatably mounted at the end of the guide plate (21); and the first micro switch (23) is fixed on the first housing (14) and is located below the guide plate (21).

7. A power system for a clothes drying machine as claimed in claim 2, characterized in that: The limiting mechanism comprises a ring gear (24), a ratchet (25), a knob (26) and a second micro switch (27); the ring gear (24) is rotatably mounted on both sides above the second housing (15) and is connected to the winding wheel (19) via a reduction gear set (28); a ratchet (25) and a knob (26) are rotatably mounted above the ring gear (24); and the second micro switch (27) is disposed on one side of the ring gear (24).

8. A power system for a clothes drying machine as claimed in claim 7, characterized in that: The gear ring (24) is provided with ratchet teeth inside and is connected to the pawl (25) via the ratchet teeth. The knob (26) is fixedly connected to the pawl (25), and a protruding rod is provided outside the knob (26).

9. A power system for a clothes drying machine as claimed in claim 2, characterized in that: The cleaning device comprises a friction plate (30) and a brush (31), wherein the friction plate (30) and the brush (31) are fixed to two ends of a first housing (14), the first housing (14) and the second housing (15) are provided with corresponding slots, the friction plate (30) is located outside the brush (31), the friction plate (30) is provided with inclined uniformly distributed friction patterns, and the friction plate (30) is made of a flexible material including a sponge capable of absorbing lubricating oil.

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