A fan motor rotor and motor

Abstract

The application relates to the technical field of motors, in particular to a fan motor rotor and a motor, which comprises a rotating shaft and a rotor fixed on the rotating shaft, a centrifugal base disc is fixed on the rotating shaft, a plurality of movable base frames are fixed on the centrifugal base disc, centrifugal brake blocks are movably connected on the movable base frames, first springs connected with the centrifugal brake blocks are fixed on the inner walls of the movable base frames, a brake base disc is arranged on the outer circumferential side of the rotating shaft, a plurality of friction plate bases are fixed on the brake base disc, friction plates for braking the centrifugal brake blocks by extruding the centrifugal brake blocks are movably connected on the friction plate bases, linkage top blocks fixed with the friction plates are movably connected in the friction plate bases, and second springs connected with the linkage top blocks are fixed on the inner walls of the friction plate bases. The application does not need to receive external control signals such as power-off signals to drive the actuating mechanism to brake the rotor, the braking response speed is fast, and the delay error caused by the electric signal transmission is avoided to prevent the equipment impact caused by the continuous slip of the rotor.

Description

Technical Field

[0001] This invention relates to the field of motor technology, specifically to a fan motor rotor and motor. Background Technology

[0002] As an important method of utilizing renewable energy, the safe and reliable operation of wind power is of paramount importance. Wind turbines are typically equipped with braking systems to ensure safety during malfunctions or extreme operating conditions, mainly including:

[0003] (1) Pneumatic braking: By changing the pitch angle of the wind turbine blades, the blades are made to stall or enter a feathering state, which greatly reduces wind energy capture, thereby achieving the deceleration of the wind turbine rotor, i.e., the impeller, driving the main shaft.

[0004] (2) Mechanical disc brake: It is usually installed on the high-speed output shaft of the gearbox or the low-speed shaft of the direct drive / semi-direct drive unit. A large-size brake disc and hydraulic or electric brake caliper are installed on the main shaft, which can provide direct mechanical braking torque when necessary.

[0005] (3) Electrical braking: It is mainly used to protect the power devices of the converter when the generator fails, such as when the power grid drops. It is not designed as the main means of speed control or emergency braking.

[0006] In the field of wind turbine motor operation, the rotor's emergency braking mechanism is directly related to equipment safety and response efficiency. Under extreme overspeed conditions, its braking capacity may be insufficient. Focusing on the rotor braking component of wind turbine drive motors, the currently mainstream integrated friction braking technology, although improving response speed through friction pad contact, still has the following drawbacks:

[0007] (1) Passive response delay: Traditional friction plate brakes need to receive external control signals, such as power failure signals, to drive the actuator, such as hydraulic push rod, to press the friction plate. It usually takes 300-500ms from signal transmission to the establishment of effective contact between the friction plate and the friction plate, which causes the rotor to continuously slip and cause equipment impact.

[0008] (2) Long-term friction loss hazards: In order to avoid starting resistance, conventional solutions require complete separation of the friction plates during operation, but the separation gap leads to excessive contact travel when a sudden power failure occurs; if the gap is reduced, abnormal friction during operation is easily caused by thermal expansion, which accelerates the wear of the friction plates.

[0009] (3) Energy waste: Maintaining the friction plates in a separated state, such as when the electromagnet is energized, requires continuous external energy consumption, which goes against the trend of green manufacturing.

[0010] Therefore, there is an urgent need for an intelligent friction braking mechanism with zero standby power consumption, zero operating friction, and instantaneous response. To this end, we provide a fan motor rotor and motor to solve the problems mentioned above. Summary of the Invention

[0011] The purpose of this invention is to provide a wind turbine motor rotor and motor that can achieve a full-cycle intelligent closed loop with zero resistance during startup, zero contact during operation, low braking delay, and low reset energy consumption in terms of rotor friction braking. This solves the problems mentioned in the background art, such as high passive response delay of existing motor rotor mechanical braking, long-term frictional loss of friction plates, and high external energy consumption of electromagnetic drive.

[0012] To achieve the above objectives, the present invention provides the following technical solution:

[0013] A fan motor rotor includes a shaft and a rotor fixed on the shaft. A centrifugal base plate is fixed on the shaft, and multiple movable base frames are fixed on the centrifugal base plate. A centrifugal brake block is movably engaged on the movable base frame. A first spring connected to the centrifugal brake block is fixed on the inner wall of the movable base frame. A brake base plate is provided on the outer periphery of the shaft. Multiple friction plate bases are fixed on the brake base plate. Friction plates for braking the centrifugal brake block mechanism by squeezing the centrifugal brake block are movably engaged on the friction plate bases. A linkage top block fixed to the friction plate is movably engaged inside the friction plate base. A second spring connected to the linkage top block is fixed on the inner wall of the friction plate base.

[0014] An electromagnetic drive mechanism is provided on one side of the rotating shaft, which actively drives the linkage top block to move down before the rotating shaft rotates, so that the friction plate disengages from the centrifugal brake block; a locking mechanism is also provided on the rotating shaft, which locks the linkage top block after it moves down, and during the rotation of the rotating shaft, the locking mechanism will actively release the lock on the linkage top block, so that the friction plate returns to its initial position.

[0015] As described above, in a fan motor rotor, multiple movable base frames are circumferentially distributed at equal angles on a centrifugal base plate. The movable base frames are provided with through slots whose inner surface dimensions match the outer surface dimensions of the centrifugal brake blocks. The centrifugal brake blocks are movably engaged inside the through slots.

[0016] As described above, in a fan motor rotor, multiple friction plate bases are circumferentially distributed at equal angles on a brake base plate. The friction plate bases and movable bases exist in pairs. The friction plate bases are provided with through slots whose inner surface dimensions match the outer surface dimensions of the friction plates. The friction plates are movably engaged inside the through slots.

[0017] As described above, in a fan motor rotor, the electromagnetic drive mechanism includes an electromagnetic armature collar movably sleeved on a rotating shaft. The electromagnetic armature collar moves on the rotating shaft driven by an electromagnet. A connecting rod is provided between the electromagnetic armature collar and the linkage top block, and the two ends of the connecting rod are respectively hinged to the electromagnetic armature collar and the linkage top block.

[0018] As described above, in a fan motor rotor, the locking mechanism includes multiple locking housings fixed on a brake base plate. A locking pin is movably engaged within each locking housing. The locking pin penetrates the friction plate base housing and is fitted against the inclined surfaces of both sides of the linkage top block. Locking grooves are formed on both sides of the linkage top block, and the locking pin is movably engaged within these grooves. A third spring connected to the locking pin is fixed to the inner wall of each locking housing. A wedge-shaped top block is fixed to the top of the locking pin. A push rod sleeve is positioned above the locking pin, and a push rod is movably engaged within the push rod sleeve. A fifth spring connected to the push rod is fixed to the inner wall of the push rod sleeve. A wedge block, fitting against the inclined surface of the wedge-shaped top block, is fixed to the bottom of the push rod. The push rod and the rotating shaft are connected via a linkage structure; when the rotating shaft rotates, it actively drives the push rod downwards.

[0019] As described above, in a fan motor rotor, multiple locking shells are circumferentially distributed at equal angles on a brake base plate. The locking shells and friction plate bases exist in pairs. The locking shells have through grooves whose inner surface dimensions match the outer surface dimensions of the locking pins. The locking pins are movably engaged inside the through grooves.

[0020] The push rod sleeve and the locking pin exist in pairs, and the inner surface dimensions of the push rod sleeve are adapted to the outer surface dimensions of the push rod.

[0021] As described above, a fan motor rotor includes a linkage structure comprising a centrifugal disc fixed on a rotating shaft, a plurality of sliding grooves fixed on the centrifugal disc, a centrifugal counterweight movably engaged on the sliding grooves, a fourth spring connected to the centrifugal counterweight fixed to the inner wall of the sliding grooves, a sleeve rotatably mounted on the rotating shaft, a rotating arm disposed between the sleeve and the centrifugal counterweight, the two ends of the rotating arm being hinged to the sleeve and the centrifugal counterweight respectively, a movable disc rotatably mounted on the sleeve, and a plurality of transmission rods disposed between the movable disc and a push rod, the two ends of the transmission rods being hinged to the movable disc and the push rod respectively.

[0022] As described above, in a fan motor rotor, multiple sliding grooves are circumferentially distributed at equal angles on a centrifugal disc. The sliding grooves have through slots whose inner surface dimensions match the outer surface dimensions of the centrifugal counterweight, and the centrifugal counterweight is movably engaged inside the through slots.

[0023] As described above, in a fan motor rotor, multiple transmission rods are circumferentially distributed at equal angles on a movable disc, and the transmission rods exist in pairs with the lock housing.

[0024] An electric motor includes a fan motor rotor, the rotor shaft being rotatably mounted on a motor housing, and the brake base plate, electromagnet, and push rod sleeve being respectively fixed on the motor housing.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: In use, in the initial state before the motor is powered on, the centrifugal brake block and the friction plate are in contact. An electromagnetic drive mechanism is provided on one side of the shaft, which actively drives the linkage top block to move down before the shaft rotates, so that the friction plate and the centrifugal brake block are disengaged, and the shaft starts to rotate with zero resistance. After that, when the motor is powered on, the shaft and the rotor will rotate at high speed. When the shaft rotates, it will drive the movable base and the centrifugal brake block to rotate synchronously. The centrifugal force of the centrifugal brake block when it rotates makes it overcome the elastic force of the first spring and make radial expansion motion. In addition, a locking mechanism is provided on the shaft, which locks the linkage top block after it moves down. During the rotation of the shaft, the locking mechanism will actively release the lock on the linkage top block, so that the friction plate returns to the initial position. When the motor is powered off, the shaft speed will drop rapidly. The centrifugal force of the centrifugal brake block when it rotates is insufficient to overcome the elastic force of the first spring. Therefore, the centrifugal brake block quickly makes radial contraction motion and makes contact with the returned friction plate. The friction plate quickly mechanically brakes the centrifugal brake block, thereby braking the rotor.

[0026] Thus, this invention uses an electromagnetic drive mechanism to actively lower the linkage top block before the motor is powered on, forcibly separating the friction plate from the centrifugal brake block, eliminating starting resistance. At the same time, it utilizes the increased centrifugal force of the centrifugal brake block during rotation to perform radial expansion motion, ensuring zero contact and physical isolation with the friction plate during operation. Furthermore, the elastic lock on the linkage top block is automatically released during rotor operation, and the friction plate returns to its standby position. During braking, at the moment of power failure, the rotor speed drops sharply. Utilizing the attenuation of centrifugal force during rotation of the centrifugal brake block, it performs radial contraction motion under the action of the first spring, actively pressing the friction plate in the preparatory position. The friction plate then mechanically brakes the centrifugal brake block. Therefore, this invention does not require receiving external control signals, such as power failure signals, to drive the actuator to brake the rotor. The braking response speed is fast, and it also avoids equipment impact caused by the delay error in electrical signal transmission that leads to continuous rotor slippage.

[0027] In addition, the electromagnetic drive mechanism of the present invention includes an electromagnet. When the electromagnet is energized, it drives the linkage top block to move down and automatically cooperates with the locking mechanism to mechanically lock the linkage top block. After that, the electromagnet can be de-energized autonomously, that is, maintaining the separation state of the centrifugal brake block and the friction plate does not require continuous consumption of external energy, thus reducing energy consumption and making it more energy-efficient. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of a fan motor rotor.

[0029] Figure 2 This is a schematic diagram of the structure of a fan motor rotor after the rotor has been removed.

[0030] Figure 3 For a type of fan motor rotor Figure 2 A structural diagram from another perspective.

[0031] Figure 4 For a type of fan motor rotor Figure 2 A schematic diagram of the structure after removing the brake base plate.

[0032] Figure 5 For a type of fan motor rotor Figure 4 A partial structural diagram.

[0033] Figure 6 For a type of fan motor rotor Figure 5 A structural diagram from another perspective.

[0034] Figure 7 This is a schematic diagram of the movable base frame and the inner structure of the friction plate base of a wind turbine motor rotor.

[0035] Figure 8 This is a schematic diagram of a partially exploded structure of a wind turbine motor rotor.

[0036] Figure 9 For a type of fan motor rotor Figure 4 A schematic diagram of the decomposed part of the structure.

[0037] Figure 10 For a type of fan motor rotor Figure 9 A schematic diagram of the decomposed part of the structure.

[0038] In the diagram: 1. Shaft; 2. Rotor; 3. Centrifugal base plate; 4. Movable base frame; 5. Centrifugal brake block; 6. First spring; 7. Brake base plate; 8. Friction plate base; 9. Friction plate; 10. Linkage top block; 11. Second spring; 12. Lock groove; 13. Electromagnetic armature collar; 14. Electromagnet; 15. Connecting rod; 16. Lock case; 17. Locking pin; 18. Third spring; 19. Wedge-shaped top block; 20. Push rod sleeve; 21. Push rod; 22. Inclined wedge block; 23. Centrifugal disc; 24. Sliding groove; 25. Centrifugal counterweight; 26. Fourth spring; 27. Sleeve; 28. Rotating arm; 29. ​​Movable disc; 30. Transmission rod; 31. Fifth spring. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0040] Please see Figures 1-10As an embodiment of the present invention, a fan motor rotor includes a rotating shaft 1 and a rotor 2 fixed on the rotating shaft 1. A centrifugal base plate 3 is fixed on the rotating shaft 1. A plurality of movable base frames 4 are fixed on the centrifugal base plate 3. A centrifugal brake block 5 is movably engaged on the movable base frame 4. A first spring 6 connected to the centrifugal brake block 5 is fixed on the inner wall of the movable base frame 4. A brake base plate 7 is provided on the outer periphery of the rotating shaft 1. A plurality of friction plate bases 8 are fixed on the brake base plate 7. A friction plate 9 for braking the centrifugal brake block 5 by squeezing the centrifugal brake block 5 is movably engaged on the friction plate base 8. A linkage top block 10 fixed to the friction plate 9 is movably engaged inside the friction plate base 8. A second spring 11 connected to the linkage top block 10 is fixed on the inner wall of the friction plate base 8.

[0041] An electromagnetic drive mechanism is provided on one side of the rotating shaft 1. Before the rotating shaft 1 rotates, it actively drives the linkage top block 10 to move down so that the friction plate 9 is disengaged from the centrifugal brake block 5. A locking mechanism is also provided on the rotating shaft 1. It locks the linkage top block 10 after it moves down. During the rotation of the rotating shaft 1, the locking mechanism will actively release the lock on the linkage top block 10 so that the friction plate 9 returns to its initial position.

[0042] In this embodiment, during use, in the initial state before the motor is powered on, the centrifugal brake block 5 and the friction plate 9 are in a state of compression contact. An electromagnetic drive mechanism is provided on one side of the rotating shaft 1, which actively drives the linkage top block 10 to move down before the rotating shaft 1 rotates, so that the friction plate 9 and the centrifugal brake block 5 are disengaged. At this time, a locking mechanism is provided on the rotating shaft 1, which locks the linkage top block 10 after it moves down, so that the rotating shaft 1 can start rotating with zero resistance. After that, when the motor is powered on, the rotating shaft 1 and the rotor 2 will rotate at high speed. When the rotating shaft 1 rotates, it will drive the movable base frame 4 and the centrifugal brake block 5 to rotate synchronously. The centrifugal force of the centrifugal brake block 5 when it rotates is transmitted. The locking mechanism will actively release the locking of the linkage top block 10 during the rotation of the shaft 1. The linkage top block 10 moves upward under the action of the second spring 11, causing the friction plate 9 to move upward and return to its initial position. When the motor is powered off, the rotation speed of the shaft 1 will drop rapidly. The centrifugal force of the centrifugal brake block 5 is insufficient to overcome the elastic force of the first spring 6. Therefore, the centrifugal brake block 5 will quickly make a radial contraction movement and press against the returned friction plate 9. The friction plate 9 will quickly mechanically brake the centrifugal brake block 5, thereby achieving the purpose of braking the rotor 2.

[0043] As a further embodiment of the present invention, multiple movable base frames 4 are circumferentially distributed at equal angles on the centrifugal base plate 3. The movable base frames 4 are provided with through slots whose inner surface dimensions are adapted to the outer surface dimensions of the centrifugal brake block 5. The centrifugal brake block 5 is movably engaged inside the through slots.

[0044] In this embodiment, the rotation of the centrifugal base plate 3 will drive the movable base frame 4 and the centrifugal brake block 5 to rotate synchronously. The centrifugal brake block 5 has friction material embedded on its outer surface. Under normal conditions, the first spring 6 pushes the centrifugal brake block 5 to retract towards the axis of the rotor 2, so that the outer edge of the centrifugal brake block 5 maintains contact pressure with the friction plate 9.

[0045] As a further embodiment of the present invention, multiple friction pad bases 8 are circumferentially distributed at equal angles on the brake base plate 7. The friction pad bases 8 and the movable base 4 exist in pairs. The friction pad bases 8 are provided with through grooves whose inner surface dimensions are adapted to the outer surface dimensions of the friction pads 9. The friction pads 9 are movably engaged inside the through grooves.

[0046] In this embodiment, the brake base plate 7 is fixed on the motor housing. The brake base plate 7 does not rotate synchronously with the rotating shaft 1. The friction plate 9 is connected to the second spring 11 through the linkage top block 10. Under normal conditions, the second spring 11 keeps the friction plate 9 in the upper braking preparation state where it is pressed and contacted with the centrifugal brake block 5.

[0047] As a further embodiment of the present invention, the electromagnetic drive mechanism includes an electromagnetic armature collar 13 movably sleeved on the rotating shaft 1. The electromagnetic armature collar 13 is driven to move on the rotating shaft 1 by an electromagnet 14. A connecting rod 15 is provided between the electromagnetic armature collar 13 and the linkage top block 10. The two ends of the connecting rod 15 are respectively hinged to the electromagnetic armature collar 13 and the linkage top block 10.

[0048] In this embodiment, the electromagnet 14 is electrically connected to an external power source via a wire. When the electromagnet 14 is briefly energized, it will generate a magnetic attraction to the electromagnetic armature collar 13, causing the electromagnetic armature collar 13 to move axially on the rotating shaft 1. When the electromagnetic armature collar 13 moves, it will cause the connecting rod 15 to deflect and pull the linkage top block 10 to move downward against the elastic force of the second spring 11, so that the friction plate 9 is completely separated from the centrifugal brake block 5. When the electromagnet 14 is de-energized, it loses its magnetic attraction to the electromagnetic armature collar 13.

[0049] As a further embodiment of the present invention, the locking mechanism includes multiple lock housings 16 fixed on the brake base plate 7. A locking pin 17 is movably engaged in the lock housing 16. The locking pin 17 passes through the housing of the friction plate base 8 and is attached to the inclined surfaces of the bottom ends of the linkage top block 10 on both sides. Locking grooves 12 are provided on both sides of the linkage top block 10. The locking pin 17 is movably engaged in the lock groove 12. A third spring 18 connected to the locking pin 17 is fixed on the inner wall of the lock housing 16. A wedge-shaped top block 19 is fixed on the top of the locking pin 17. A push rod sleeve 20 is provided above the locking pin 17. A push rod 21 is movably engaged in the push rod sleeve 20. A fifth spring 31 connected to the push rod 21 is fixed on the inner wall of the push rod sleeve 20. An inclined wedge block 22 attached to the inclined surface of the wedge-shaped top block 19 is fixed at the bottom of the push rod 21. The push rod 21 and the rotating shaft 1 are connected by a linkage structure. When the rotating shaft 1 rotates, it will actively drive the push rod 21 to move down.

[0050] In this embodiment, when the electromagnetic drive mechanism pulls the linkage top block 10 downward, the inclined surface at the bottom of the linkage top block 10 presses the locking pin 17 back into the lock housing 16. When the linkage top block 10 moves down to the set position where the locking groove 12 aligns with the locking pin 17, the third spring 18 pushes the locking pin 17 radially into the locking groove 12, thereby achieving mechanical locking of the linkage top block 10 and maintaining the separation state of the friction plate 9 and the centrifugal brake block 5. When the rotating shaft 1 rotates, the linkage structure drives the push rod 21 downward, and the inclined wedge block 2... The inclined surface of 2 presses against the wedge-shaped top block 19, and the locking pin 17 is pushed out of the locking groove 12 by the inclined force. The linkage top block 10 is released from locking. Under the elastic reset action of the second spring 11, the linkage top block 10 will be squeezed to move upward. Then the friction plate 9 will be reset to the upper braking preparation state where it is pressed against the centrifugal brake block 5. After the locking pin 17 is released from the locking groove 12, the third spring 18 is compressed and stored. The fifth spring 31 keeps the push rod 21 moving upward. The inclined wedge block 22 and the inclined surface of the wedge-shaped top block 19 are always in contact.

[0051] As a further embodiment of the present invention, multiple lock housings 16 are circumferentially distributed at equal angles on the brake base plate 7. The lock housings 16 and the friction plate base 8 exist in pairs. The lock housings 16 are provided with through grooves whose inner surface dimensions are adapted to the outer surface dimensions of the locking pins 17. The locking pins 17 are movably engaged inside the through grooves.

[0052] The inner dimensions of the push rod sleeve 20 are compatible with the outer dimensions of the push rod 21.

[0053] In this embodiment, the lock housing 16 and the friction plate base 8 are paired at equal angles with the rotor 2 axis as the reference, ensuring that the locking action of the friction plate 9 on each friction plate base 8 on the centrifugal brake block 5 is independent and synchronous. The lock housing 16 restricts the locking pin 17 to move only radially to prevent skew and jamming. The through groove of the push rod sleeve 20 provides axial guidance for the push rod 21, ensuring that the inclined surface of the wedge block 22 accurately presses the wedge-shaped top block 19 when the push rod 21 moves down.

[0054] As a further embodiment of the present invention, the linkage structure includes a centrifugal disc 23 fixed on a rotating shaft 1, a plurality of sliding grooves 24 fixed on the centrifugal disc 23, a centrifugal counterweight 25 movably engaged on the sliding grooves 24, a fourth spring 26 connected to the centrifugal counterweight 25 fixed on the inner wall of the sliding grooves 24, a sleeve 27 rotatably mounted on the rotating shaft 1, a rotating arm 28 provided between the sleeve 27 and the centrifugal counterweight 25, the two ends of the rotating arm 28 being hinged to the sleeve 27 and the centrifugal counterweight 25 respectively, a movable disc 29 rotatably mounted on the sleeve 27, a plurality of transmission rods 30 provided between the movable disc 29 and the push rod 21, the two ends of the transmission rods 30 being hinged to the movable disc 29 and the push rod 21 respectively.

[0055] In this embodiment, when the rotating shaft 1 rotates at high speed, the centrifugal counterweight 25 is subjected to centrifugal force to overcome the elastic force of the fourth spring 26 and is thrown out radially along the through groove of the sliding groove 24 to make radial expansion motion. The rotating arm 28 pulls the sleeve 27 to rotate and move it to the side of the centrifugal disk 23. The movable disk 29 is rotatably mounted on the sleeve 27. The movable disk 29 moves axially to the side of the centrifugal disk 23 synchronously with the sleeve 27. The traction transmission rod 30 moves down, thereby driving the push rod 21 to move axially.

[0056] As a further embodiment of the present invention, multiple sliding grooves 24 are circumferentially distributed at equal angles on the centrifugal disc 23. The sliding grooves 24 are provided with through grooves whose inner surface dimensions are adapted to the outer surface dimensions of the centrifugal counterweight 25. The centrifugal counterweight 25 is movably engaged inside the through groove.

[0057] In this embodiment, the sliding groove 24 provides guidance for the radial movement of the centrifugal counterweight 25, and the preload of the fourth spring 26 is adapted to the weight of the centrifugal counterweight 25 itself, so as to prevent the centrifugal counterweight 25 from slipping off when the rotor 2 is stationary.

[0058] As a further embodiment of the present invention, multiple transmission rods 30 are circumferentially distributed at equal angles on the movable disk 29, and the transmission rods 30 and the lock housing 16 exist in pairs.

[0059] In this embodiment, the transmission rod 30 is used to convert the axial movement of the movable disk 29 into the radial movement of the push rod 21.

[0060] An electric motor includes a fan motor rotor, wherein the rotating shaft 1 is rotatably mounted on the motor housing, and the brake base plate 7, electromagnet 14, and push rod sleeve 20 are respectively fixed on the motor housing.

[0061] In this embodiment, the motor housing serves as a structural frame, providing stable mounting points and structural support for the rotating shaft 1, brake base plate 7, electromagnet 14, and push rod sleeve 20.

[0062] The working principle of this invention is as follows: Before the motor is powered on, the electromagnet 14 is briefly energized to drive the electromagnetic armature collar 13 to move axially. This, in turn, pulls the linkage top block 10 downward via the connecting rod 15, causing the friction plate 9 to separate from the centrifugal brake block 5. Simultaneously, the locking pin 17, under the action of the third spring 18, engages inside the locking groove 12 of the linkage top block 10, maintaining the separation of the friction plate 9 from the centrifugal brake block 5, thus achieving zero-resistance starting of the rotor 2. After the motor starts, the shaft 1 rotates at high speed. The centrifugal brake block 5, under the action of centrifugal force, overcomes the elastic force of the first spring 6 and expands radially away from the friction plate 9. The centrifugal counterweight 25 is thrown outward by centrifugal force, driving the sleeve 27 to move axially. This movement, via the transmission rod 30, drives the push rod 21 to move radially. The inclined wedge block 22 presses against the wedge-shaped top block 19, and the locking pin 17 moves into the lock housing 16, disengaging from the lock groove 12 to unlock and lock the linkage top block 10, thus releasing the linkage top block 10; the second spring 11 pushes the linkage top block 10 and the friction plate 9 upward to return to the braking preparatory position, while maintaining a safe gap with the expanding centrifugal brake block 5; when the motor is powered off, the rotation speed of the shaft 1 drops sharply, the centrifugal force of the centrifugal brake block 5 decreases, the first spring 6 pushes the centrifugal brake block 5 to radially retract to the initial position, and the reset friction plate 9 and the radially retracting centrifugal brake block 5 are pressed into contact momentarily, achieving mechanical braking of the rotor 2 through friction torque; during the motor power-on process, the electromagnet 14 is de-energized throughout, maintaining a zero-energy consumption state.

[0063] The above embodiments are exemplary and not restrictive. Therefore, any technical solutions that can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention are included within the scope of the present invention.

Claims

1. A fan motor rotor, comprising a shaft (1) and a rotor (2) fixed on the shaft (1), characterized in that, A centrifugal base plate (3) is fixed on the rotating shaft (1). Multiple movable base frames (4) are fixed on the centrifugal base plate (3). A centrifugal brake block (5) is movably engaged on the movable base frame (4). A first spring (6) connected to the centrifugal brake block (5) is fixed on the inner wall of the movable base frame (4). A brake base plate (7) is provided on the outer periphery of the rotating shaft (1). Multiple friction plate bases (8) are fixed on the brake base plate (7). A friction plate (9) for braking the centrifugal brake block (5) mechanism by squeezing the centrifugal brake block (5) is movably engaged on the friction plate base (8). A linkage top block (10) fixed to the friction plate (9) is movably engaged inside the friction plate base (8). A second spring (11) connected to the linkage top block (10) is fixed on the inner wall of the friction plate base (8). An electromagnetic drive mechanism is provided on one side of the rotating shaft (1), which actively drives the linkage top block (10) to move down before the rotating shaft (1) rotates, so that the friction plate (9) disengages from the centrifugal brake block (5); a locking mechanism is also provided on the rotating shaft (1), which locks the linkage top block (10) after it moves down, and during the rotation of the rotating shaft (1), the locking mechanism will actively release the lock on the linkage top block (10), so that the friction plate (9) returns to its initial position; The locking mechanism includes multiple lock housings (16) fixed on the brake base plate (7). Locking pins (17) are movably engaged within each lock housing (16). The locking pins (17) penetrate the friction plate base (8) housing and are fitted against the inclined surfaces at the bottom ends of the linkage top block (10). Locking grooves (12) are provided on both sides of the linkage top block (10). The locking pins (17) are movably engaged within the locking grooves (12). A third spring (18) connected to the locking pins (17) is fixed to the inner wall of each lock housing (16). A wedge-shaped top block (19) is fixed at the top. A push rod sleeve (20) is provided above the locking pin (17). A push rod (21) is movably engaged inside the push rod sleeve (20). A fifth spring (31) connected to the push rod (21) is fixed on the inner wall of the push rod sleeve (20). A wedge block (22) that fits against the inclined surface of the wedge-shaped top block (19) is fixed at the bottom of the push rod (21). The push rod (21) and the rotating shaft (1) are connected by a linkage structure. When the rotating shaft (1) rotates, it will actively drive the push rod (21) to move down. Multiple lock housings (16) are circumferentially distributed at equal angles on the brake base plate (7). The lock housings (16) and friction plate bases (8) exist in pairs. The lock housings (16) have through slots whose inner surface dimensions match the outer surface dimensions of the locking pins (17). The locking pins (17) are movably engaged inside the through slots. The push rod sleeve (20) and the locking pin (17) exist in pairs, and the inner surface dimensions of the push rod sleeve (20) are adapted to the outer surface dimensions of the push rod (21).

2. A fan motor rotor according to claim 1, characterized in that, Multiple movable base frames (4) are circumferentially distributed at equal angles on the centrifugal base plate (3). The movable base frames (4) are provided with through slots whose inner surface dimensions are adapted to the outer surface dimensions of the centrifugal brake block (5). The centrifugal brake block (5) is movably engaged inside the through slots.

3. A fan motor rotor according to claim 1, characterized in that, Multiple friction pad bases (8) are circumferentially distributed at equal angles on the brake base plate (7). The friction pad bases (8) and the movable base (4) exist in pairs. The friction pad bases (8) have through grooves whose inner surface dimensions match the outer surface dimensions of the friction pads (9). The friction pads (9) are movably engaged inside the through grooves.

4. A fan motor rotor according to claim 1, characterized in that, The electromagnetic drive mechanism includes an electromagnetic armature collar (13) movably sleeved on a rotating shaft (1). The electromagnetic armature collar (13) is driven to move on the rotating shaft (1) by an electromagnet (14). A connecting rod (15) is provided between the electromagnetic armature collar (13) and the linkage top block (10). The two ends of the connecting rod (15) are respectively hinged to the electromagnetic armature collar (13) and the linkage top block (10).

5. A fan motor rotor according to claim 1, characterized in that, The linkage structure includes a centrifugal disc (23) fixed on a rotating shaft (1), a plurality of sliding grooves (24) fixed on the centrifugal disc (23), a centrifugal counterweight (25) movably engaged on the sliding groove (24), a fourth spring (26) connected to the centrifugal counterweight (25) fixed on the inner wall of the sliding groove (24), a sleeve (27) rotatably mounted on the rotating shaft (1), a rotating arm (28) provided between the sleeve (27) and the centrifugal counterweight (25), the two ends of the rotating arm (28) being hinged to the sleeve (27) and the centrifugal counterweight (25) respectively, a movable disc (29) rotatably mounted on the sleeve (27), a plurality of transmission rods (30) provided between the movable disc (29) and the push rod (21), the two ends of the transmission rods (30) being hinged to the movable disc (29) and the push rod (21) respectively.

6. A fan motor rotor according to claim 5, characterized in that, Multiple sliding grooves (24) are circumferentially distributed at equal angles on the centrifugal disc (23). The sliding grooves (24) have through grooves whose inner surface dimensions match the outer surface dimensions of the centrifugal counterweight (25). The centrifugal counterweight (25) is movably engaged inside the through groove.

7. A fan motor rotor according to claim 5, characterized in that, Multiple transmission rods (30) are circumferentially distributed at equal angles on the movable disk (29), and the transmission rods (30) exist in pairs with the lock housing (16).

8. An electric motor, comprising a fan motor rotor as described in any one of claims 1-7, characterized in that, The rotating shaft (1) is rotatably mounted on the motor housing, and the brake base plate (7), electromagnet (14), and push rod sleeve (20) are respectively fixed on the motor housing.

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