A brushless motor with a static locking structure

Abstract

This application relates to the technical field of brushless motors, specifically to a brushless motor with a static locking structure, including a stator assembly, a rotor assembly, and a locking assembly. The stator assembly includes a stator base, a hollow shaft, and an iron core. The hollow shaft is fixedly mounted on the stator base, and the iron core is sleeved on the hollow shaft. The rotor assembly includes a rotating shaft, a housing, and a magnetic ring. One end of the rotating shaft is rotatably inserted into the hollow shaft, and the other end of the rotating shaft is fixedly connected to the housing. The magnetic ring is fixedly disposed in the housing and surrounds the rotating shaft. The locking assembly is used to fix the rotor assembly. By setting the locking assembly, the rotation of the rotor assembly is restricted when the brushless motor or the equipment or instrument equipped with the brushless motor is in a stopped state, thereby solving the technical problem in the prior art that the rotor of a brushless motor can be manually or passively moved when it is stopped, thus improving the user experience.

Description

Technical Field

[0001] This application relates to the technical field of brushless motors, and in particular to a brushless motor with a static locking structure. Background Technology

[0002] A brushless motor is a device that uses an electronic commutator to replace traditional brushes and commutators to achieve motor rotation. It has advantages such as high efficiency, long lifespan, and low noise, and is widely used in drones, electric vehicles, home appliances, industrial equipment, and other fields. Its core structure can be divided into four main modules: stator, rotor, position sensor, and drive circuit.

[0003] However, when existing brushless motors are stopped, their rotors can be moved manually or passively. This means that if some equipment or instruments that require brushless motors are subjected to vibration or collision during transportation, the parts connected to the rotor of the brushless motor will be affected by the vibration or collision and will be displaced, affecting the overall equipment or instruments. Therefore, this application proposes a brushless motor with a static locking structure. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this application is to provide a brushless motor with a static locking structure, which solves the technical problem in the prior art that the rotor of a brushless motor can be manually or passively moved when the motor is stopped.

[0005] The above-mentioned objective of this application is achieved through the following technical solution: a brushless motor with a static locking structure, comprising a stator assembly, a rotor assembly, and a locking assembly. The stator assembly includes a stator base, a hollow shaft, and an iron core. The hollow shaft is fixedly mounted on the stator base, and the iron core is sleeved on the hollow shaft. The rotor assembly includes a rotating shaft, a housing, and a magnetic ring. One end of the rotating shaft is rotatably inserted into the hollow shaft, and the other end of the rotating shaft is fixedly connected to the housing. The magnetic ring is fixedly disposed within the housing and surrounds the rotating shaft. The locking assembly is used to fix the rotor assembly.

[0006] Furthermore, the locking assembly includes a locking protrusion, a locking groove, a mounting hole, a locking spring, and a locking block. The locking protrusion is fixedly disposed on the edge of the housing and opposite to the stator base. The locking groove is formed on the side of the locking protrusion opposite to the stator base. The mounting hole is formed on the edge of the stator base and faces the housing. The locking block is slidably inserted into the mounting hole. The locking spring is installed in the mounting hole and is used to push the locking block into the locking groove, so that the rotor assembly is fixed.

[0007] By adopting the above technical solution, when workers need to transport brushless motors or equipment or machinery equipped with brushless motors, they only need to rotate the rotor assembly so that the locking protrusion on the housing aligns with the locking block on the stator base. During this process, the locking protrusion first contacts the locking block and presses it down. The downward-moving locking block compresses the locking spring. Subsequently, the locking protrusion continues to move, and the locking groove of the locking protrusion aligns with the locking block. The locking spring loses the pressure of the locking protrusion and releases its elasticity, pushing the locking block into the locking groove, thereby restricting the continued movement of the locking protrusion and thus restricting the rotation of the housing. This achieves the purpose of fixing the rotor assembly, thus solving the technical problem in the prior art that the rotor of a brushless motor can be manually or passively moved when it is stopped, improving the user experience.

[0008] Furthermore, the locking block is spherical in shape, and the locking groove structure is adapted to the shape of the locking block.

[0009] By adopting the above technical solution, when the locking protrusion contacts the locking block and presses the locking block to move downward, it can press the locking block more smoothly along the arc surface of the spherical locking block, reducing frictional wear between the locking protrusion and the locking block, thereby improving the service life of the locking protrusion and the locking block.

[0010] Furthermore, it also includes a limiting component, which is used to limit the rotor assembly from exceeding the rotation range.

[0011] Furthermore, the limiting component includes a limiting arc block and a moving arc block. The limiting arc block is fixedly disposed on the edge of the hollow shaft away from the stator base, and the moving arc block is fixedly disposed on the periphery of the end of the rotating shaft connected to the housing. When the brushless motor is in the initial state, the concave surfaces of the limiting arc block and the moving arc block are opposite to each other.

[0012] While the above technical solution improves the lifespan of the locking protrusion and the locking block by making the end of the locking block away from the locking spring spherical, it also reduces the stability of the locking assembly. This can cause the rotor assembly to rotate further when subjected to significant vibration or impact, exceeding its rotation range and leading to errors in subsequent control programs. The limit component solves this problem. When the brushless motor or equipment with a brushless motor is subjected to significant vibration or impact, and the rotor assembly is about to disengage from the locking block and exceed its rotation range, the moving arc block abuts against the limit arc block for further restriction, thus preventing the rotor assembly from exceeding its rotation range and ensuring that the control program can accurately control the reciprocating rotation of the rotor assembly.

[0013] Furthermore, the side of the moving arc block that contacts the limiting arc block is provided with a snap-fit ​​groove for accommodating the limiting arc block.

[0014] While the limiting component prevents the rotor assembly from exceeding its rotation range, the limitation of the limiting component also means that the moving arc block may collide with the limiting arc block. If the moving arc block cannot push the limiting arc block, it will generate a reaction force, causing the moving arc block to pull the entire rotor assembly away from the limiting arc block, disengaging from the locking block. This can lead to displacement of the part of the equipment or instrument connected to the brushless motor rotor, affecting the overall equipment or instrument. The locking groove solves this problem. When the moving arc block abuts against the limiting arc block, the end of the limiting arc block inserts into the locking groove, forming a concave-convex fit with the moving arc block. This increases the friction between the moving arc block and the limiting arc block, thereby reducing the reaction force generated by the moving arc block and reducing the possibility of the moving arc block pulling the entire rotor assembly away from the limiting arc block and disengaging from the locking block. This further improves the locking stability of the locking component.

[0015] Furthermore, the locking groove is provided with a limiting component for restricting the locking block.

[0016] Furthermore, the limiting component includes a limiting ring and connecting rods. There are two connecting rods, which are vertically fixed on both sides inside the locking groove. The two connecting rods are parallel to each other. The two sides of the limiting ring are fixedly connected to the two connecting rods respectively. The diameter of the limiting ring is smaller than the maximum diameter of the locking block in the initial state. Both the limiting ring and the connecting rods are elastic.

[0017] By adopting the above technical solution, although setting the end of the locking block away from the locking spring to be spherical improves the service life of the locking protrusion and the locking block, it also leads to a decrease in the locking stability of the locking assembly. The setting of the limiting component further improves the locking stability of the locking assembly. With the setting of the limiting component, when the locking spring pushes the locking block into the locking groove, in this process, the end of the locking block will first contact the limiting ring. Under the action of the locking spring, the limiting ring gradually expands until the part with the largest diameter at the end of the locking block passes through the limiting ring. Then, because the limiting ring has the elasticity, the limiting ring will retract and adhere to the periphery of the locking block, so that the limiting ring locks the locking block, thereby strengthening the connection between the locking block and the locking protrusion, so as to further improve the locking stability of the locking assembly.

[0018] Furthermore, the stator base has an installation notch on the side facing away from the hollow shaft.

[0019] By adopting the above technical solution, the stator base can be fixedly installed on the equipment or instrument.

[0020] Furthermore, the stator base is provided with a sensing magnetic ring on the side opposite to the hollow shaft for sensing the position of the rotating shaft.

[0021] By adopting the above technical solution, the real-time position of the rotating shaft can be sensed by the sensing magnetic ring. When the brushless motor stops, it can be determined whether the rotor assembly is in a locked state. If it is not in a locked state, the control program can drive the brushless motor to rotate the shaft, thereby causing the housing to rotate. This causes the moving arc block to abut against the limiting arc block, and the locking block to extend into the locking groove, so that the rotor assembly is in a locked state. This eliminates the need for operators to manually adjust the brushless motor to enter the locked state, improving the user experience.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By using a locking assembly, when workers need to transport a brushless motor or equipment / machinery equipped with a brushless motor, they only need to rotate the rotor assembly so that the locking protrusion on the housing aligns with the locking block on the stator base. During this process, the locking protrusion first contacts the locking block and presses it downwards. The downward-moving locking block compresses the locking spring. Subsequently, the locking protrusion continues to move, and its locking groove aligns with the locking block. The locking spring loses the pressure from the locking protrusion and releases its elasticity, pushing the locking block into the locking groove, thereby restricting the continued movement of the locking protrusion and thus restricting the rotation of the housing. This achieves the purpose of fixing the rotor assembly, solving the technical problem in the prior art where the rotor of a brushless motor can be manually or passively moved when the motor is stopped, thus improving the user experience.

[0024] 2. By setting the limit component, when the brushless motor or equipment or machinery equipped with the brushless motor is subjected to large vibration or collision, and the rotor assembly is about to break away from the limit of the locking block and exceed the rotation range, the moving arc block abuts against the limit arc block for further restriction, thereby preventing the rotor assembly from exceeding the rotation range and ensuring that the control program can accurately control the rotor assembly to reciprocate.

[0025] 3. By setting the limiting component, when the locking spring pushes the locking block into the locking groove, the end of the locking block will first contact the limiting ring. Under the action of the locking spring, the limiting ring will gradually expand until the part with the largest diameter at the end of the locking block passes through the limiting ring. Then, because the limiting ring has the characteristic of elasticity, the limiting ring will retract and adhere to the periphery of the locking block, so that the limiting ring locks the locking block, thereby enhancing the connection between the locking block and the locking protrusion, so as to further improve the locking stability of the locking component. Attached Figure Description

[0026] Figure 1This is a schematic diagram of the overall structure of the embodiment;

[0027] Figure 2 This is an exploded view of the overall structure of the embodiment;

[0028] Figure 3 yes Figure 2 Another view;

[0029] Figure 4 yes Figure 3 Enlarged view of section A.

[0030] Reference numerals: 1. Stator assembly; 10. Stator base; 11. Hollow shaft; 12. Iron core; 13. Mounting notch; 14. Induction magnetic ring; 2. Rotor assembly; 20. Rotating shaft; 21. Housing; 22. Magnetic ring; 3. Locking assembly; 30. Locking protrusion; 31. Locking groove; 32. Locking block; 4. Limiting assembly; 40. Limiting arc block; 41. Moving arc block; 42. Snap-fit ​​groove; 5. Restriction assembly; 50. Restriction ring; 51. Connecting rod; 6. Bearing. Detailed Implementation

[0031] The present application will be further described in detail below with reference to the accompanying drawings.

[0032] Reference Figures 1 to 3 A brushless motor with a static locking structure includes a stator assembly 1, a rotor assembly 2, and a locking assembly 3. The stator assembly 1 includes a stator base 10, a hollow shaft 11, and an iron core 12. The hollow shaft 11 is fixedly mounted on the stator base 10, and the iron core 12 is sleeved on the hollow shaft 11. The rotor assembly 2 includes a rotating shaft 20, a housing 21, and a magnetic ring 22. One end of the rotating shaft 20 is rotatably inserted into the hollow shaft 11, and the other end of the rotating shaft 20 is fixedly connected to the housing 21. The magnetic ring 22 is fixedly disposed in the housing 21 and surrounds the rotating shaft 20. The locking assembly 3 is used to fix the rotor assembly 2.

[0033] Specifically, the stator base 10 is circular, with a through hole at its center, and the hollow shaft 11 is concentric with this through hole. The hollow shaft 11 can be fixed to the stator base 10 by welding, bonding, or other methods. The iron core 12 is made of laminated silicon steel sheets and plays a crucial role in the brushless motor by providing the magnetic circuit, reducing losses, and supporting the windings. The housing 21 is a circular shell with an opening at the bottom. The magnetic ring 22 can be mounted on the housing 21 by welding, bonding, or other methods.

[0034] The locking assembly 3 includes a locking protrusion 30, a locking groove 31, a mounting hole, a locking spring, and a locking block 32. The locking protrusion 30 is fixedly disposed on the edge of the housing 21 and opposite to the stator base 10. The locking groove 31 is formed on the side of the locking protrusion 30 opposite to the stator base 10. The mounting hole is formed on the edge of the stator base 10 and faces the housing 21. The locking block 32 is slidably inserted into the mounting hole. The locking spring is installed in the mounting hole and is used to push the locking block 32 into the locking groove 31 so that the rotor assembly 2 is fixed.

[0035] When workers need to transport brushless motors or equipment or machinery equipped with brushless motors, they only need to rotate the rotor assembly 2 so that the locking protrusion 30 on the housing 21 aligns with the locking block 32 on the stator base 10. During this process, the locking protrusion 30 first contacts the locking block 32 and presses the locking block 32 down. The downward-moving locking block 32 compresses the locking spring. Then, the locking protrusion 30 continues to move, and the locking groove 31 of the locking protrusion 30 aligns with the locking block 32. The locking spring loses the pressure of the locking protrusion 30 and releases its elasticity, pushing the locking block 32 into the locking groove 31, thereby restricting the continued movement of the locking protrusion 30 and thus restricting the rotation of the housing 21. This achieves the purpose of fixing the rotor assembly 2, thus solving the technical problem in the prior art that the rotor of a brushless motor can be manually or passively moved when it is stopped, improving the user experience.

[0036] It should be noted that in this embodiment, the rotation amplitude of the rotor assembly 2 is limited to within 180 degrees by the control program. That is to say, the rotor assembly 2 reciprocates within an angle of 180 degrees. When the rotation amplitude of the rotor assembly 2 exceeds 180 degrees, the locking protrusion 30 approaches the locking block 32 to lock the rotor assembly 2.

[0037] In other embodiments, the locking assembly 3 includes a locking fixed magnet and a locking moving magnet. The locking fixed magnet is fixedly installed on the edge of the stator base 10 with one end facing the housing 21. The locking moving magnet is installed on the edge of the housing 21 facing the stator base 10 and is used to attract each other with the locking fixed magnet. When the operator needs to transport the brushless motor or equipment or machinery equipped with the brushless motor, they only need to rotate the rotor assembly 2 in a specified direction (clockwise or counterclockwise) so that the side of the housing 21 where the locking moving magnet and the locking fixed magnet attract each other is close to the locking fixed magnet, until the locking moving magnet and the locking fixed magnet come into contact and attract each other, thereby fixing the housing 21 and thus fixing the rotor assembly 2 as a whole. The embodiments using locking fixed magnets and locking moving magnets are collectively referred to as magnet embodiments, and the embodiments using locking protrusions 30, locking grooves 31, mounting holes, locking springs, and locking blocks 32 are collectively referred to as spring embodiments.

[0038] Compared to the spring embodiment, the magnet embodiment has a simpler structure and lower production cost. On the other hand, because the spring embodiment uses a locking block 32 inserted into the locking groove 31 of the locking protrusion 30 to temporarily connect the housing 21 and the stator base 10 through a concave-convex structure, while the magnet embodiment only uses the mutual attraction between the locking moving magnet and the locking stationary magnet to fix the housing 21, the spring embodiment offers higher stability and shock resistance, while the magnet embodiment has a simpler structure and lower production cost. In practical applications, the choice can be made based on specific needs.

[0039] In one embodiment, a bearing 6 may be installed between the rotating shaft 20 and the hollow shaft 11 to reduce friction between the hollow shaft 11 and the bearing 6 and improve the service life of the brushless motor.

[0040] In this embodiment, the locking block 32 is generally spherical, and the locking groove 31 is adapted to the shape of the locking block 32. This allows the locking protrusion 30 to contact the locking block 32 and press the locking block 32 downwards more smoothly along the arc surface of the spherical locking block 32, reducing frictional wear between the locking protrusion 30 and the locking block 32, thereby improving the service life of the locking protrusion 30 and the locking block 32.

[0041] On the other hand, when the staff needs to use the brushless motor, the brushless motor can be started to make the rotor assembly 2 rotate. During the rotation, the locking protrusion 30 smoothly presses the locking block 32 along the arc surface of the spherical locking block 32 so that the locking block 32 disengages from the locking protrusion 30, thereby allowing the rotor assembly 2 to continue to rotate without manual unlocking of the rotor assembly 2.

[0042] Although setting the end of the locking block 32 away from the locking spring to be spherical improves the service life of the locking protrusion 30 and the locking block 32, it also reduces the locking stability of the locking assembly 3. This means that when the brushless motor or equipment or machinery equipped with a brushless motor is subjected to significant vibration or impact, the rotor assembly 2 may still rotate further, causing the rotor assembly 2 to exceed its rotation range, resulting in errors when the subsequent control program controls the rotation of the rotor assembly 2. To solve this technical problem, this embodiment also provides a limit component 4, which is used to limit the rotor assembly 2 from exceeding its rotation range.

[0043] Reference Figure 4 The limiting component 4 includes a limiting arc block 40 and a moving arc block 41. The limiting arc block 40 is fixedly disposed on the edge of the hollow shaft 11 away from the stator base 10. The moving arc block 41 is fixedly disposed on the periphery of the end of the rotating shaft 20 connected to the housing 21. When the brushless motor is in the initial state, the concave surfaces of the limiting arc block 40 and the moving arc block 41 are opposite to each other.

[0044] The limiting arc block 40 can be installed on the hollow shaft 11 by welding, snap-fitting, or other fixing methods. The moving arc block 41 can be installed on the rotating shaft 20 by welding, snap-fitting, or other fixing methods. In the initial state, i.e., when the brushless motor is not started, the concave surfaces of the limiting arc block 40 and the moving arc block 41 are opposite each other, and there is a certain distance between the locking protrusion 30 and the locking block 32.

[0045] By setting the limit component 4, when the brushless motor or equipment or machinery equipped with the brushless motor is subjected to large vibration or collision, and the rotor assembly 2 is about to break away from the limit of the locking block 32 and exceed the rotation range, the moving arc block 41 abuts against the limit arc block 40 to achieve further restriction, thereby preventing the rotor assembly 2 from exceeding the rotation range, so as to ensure that the control program can accurately control the rotor assembly 2 to reciprocate.

[0046] Although the limiting component 4 prevents the rotor assembly 2 from exceeding its rotation range, the limitation imposed by the limiting component 4 may also cause the moving arc block 41 to collide with the limiting arc block 40. If the moving arc block 41 cannot push the limiting arc block 40, it will generate a reaction force, causing the moving arc block 41 to pull the entire rotor assembly 2 away from the limiting arc block 40. This can cause the locking protrusion 30 of the rotor assembly 2 to disengage from the locking block 32, resulting in displacement of the part of the equipment or instrument connected to the rotor of the brushless motor, affecting the overall equipment or instrument. To solve this technical problem, this embodiment provides a snap-fit ​​groove 42 for accommodating the limiting arc block 40 on the side of the moving arc block 41 that contacts the limiting arc block 40.

[0047] By setting the snap-fit ​​groove 42, when the moving arc block 41 abuts against the limiting arc block 40, the end of the limiting arc block 40 is inserted into the snap-fit ​​groove 42 and forms a concave-convex fit with the moving arc block 41, which increases the friction between the moving arc block 41 and the limiting arc block 40, thereby reducing the reaction force generated by the moving arc block 41 and reducing the possibility that the moving arc block 41 will rotate the entire rotor assembly 2 away from the limiting arc block 40, thereby disengaging from the locking block 32, further improving the locking stability of the locking assembly 3.

[0048] Although setting the end of the locking block 32 away from the locking spring to be spherical improves the service life of the locking protrusion 30 and the locking block 32, it also leads to a decrease in the locking stability of the locking assembly 3. To solve this technical problem, this embodiment provides a limiting assembly 5 for limiting the locking block 32 in the locking groove 31. The limiting assembly 5 includes a limiting ring 50 and a connecting rod 51. There are two connecting rods 51, which are vertically fixed on both sides inside the locking groove 31. The two connecting rods 51 are parallel to each other. The two sides of the limiting ring 50 are fixedly connected to the two connecting rods 51 respectively. The diameter of the limiting ring 50 in the initial state is smaller than the maximum diameter of the locking block 32. Both the limiting ring 50 and the connecting rod 51 are elastic.

[0049] The limiting ring 50 and the connecting rod 51 can be made of rubber, polyurethane elastomer, or other elastic materials. The limiting ring 50 can be connected to the connecting rod 51 by integration, bonding, or other fixing methods. The connecting rod 51 can be installed in the locking groove 31 by bonding, welding, or other fixing methods.

[0050] By setting the limiting component 5, when the locking spring pushes the locking block 32 into the locking groove 31, the end of the locking block 32 will first contact the limiting ring 50. Under the action of the locking spring, the limiting ring 50 will gradually expand until the part with the largest diameter at the end of the locking block 32 passes through the limiting ring 50. Then, because the limiting ring 50 has the characteristic of elasticity, the limiting ring 50 will retract and adhere to the periphery of the locking block 32, so that the limiting ring 50 locks the locking block 32, thereby enhancing the connection between the locking block 32 and the locking protrusion 30, so as to further improve the locking stability of the locking component 3.

[0051] On the other hand, the combination of the limiting component 4 and the restricting component 5 forms a "double locking mechanism", which greatly reduces the possibility that the rotor assembly 2 will be released from the limit of the locking block 32 when the brushless motor or the equipment or machinery equipped with the brushless motor is subjected to large vibration or collision.

[0052] In this embodiment, the stator base 10 has an installation notch 13 on the side opposite to the hollow shaft 11. The installation notch 13 allows the stator base 10 to be snapped into the installation position of the equipment or instrument, so that the stator base 10 can be fixedly installed on the equipment or instrument.

[0053] In this embodiment, the stator base 10 is provided with a sensing magnetic ring 14 on the side opposite to the hollow shaft 11 for sensing the position of the rotating shaft 20. By sensing the real-time position of the rotating shaft 20 through the sensing magnetic ring 14, it can be determined whether the rotor assembly 2 is in a locked state when the brushless motor stops. If it is not in a locked state, the brushless motor can be driven by the control program to make the rotating shaft 20 rotate, thereby driving the housing 21 to rotate, so that the moving arc block 41 abuts against the limiting arc block 40, and the locking block 32 extends into the locking groove 31, so that the rotor assembly 2 is in a locked state. In this way, the operator does not need to manually adjust the brushless motor to enter the locked state, which improves the user experience.

[0054] Specific implementation process: When the brushless motor or equipment or machinery equipped with the brushless motor stops, the sensing magnetic ring 14 senses the real-time position of the rotating shaft 20 and outputs current according to the real-time position of the rotating shaft 20, driving the rotating shaft 20 to rotate the rotor assembly 2 to the locked state. At this time, the locking protrusion 30 is aligned with the locking block 32 on the stator base 10 and the locking spring pushes the locking block 32 into the locking groove 31. At the same time, the moving arc block 41 abuts against the limiting arc block 40. The end of the limiting arc block 40 is inserted into the snap-fit ​​groove 42 and forms a concave-convex fit with the moving arc block 41 to achieve the purpose of locking the rotor assembly 2.

[0055] It should be noted that during the process of the locking spring pushing the locking block 32 into the locking groove 31, the end of the locking block 32 will contact the limiting ring 50. Under the action of the locking spring, the limiting ring 50 gradually expands until the part with the largest diameter at the end of the locking block 32 passes through the limiting ring 50. Subsequently, because the limiting ring 50 has the characteristic of elasticity, the limiting ring 50 will retract and adhere to the periphery of the locking block 32, so that the limiting ring 50 locks the locking block 32, thereby strengthening the connection between the locking block 32 and the locking protrusion 30.

[0056] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A brushless motor with a static locking structure, characterized in that, The system includes a stator assembly, a rotor assembly, and a locking assembly. The stator assembly includes a stator base, a hollow shaft, and an iron core. The hollow shaft is fixedly mounted on the stator base, and the iron core is sleeved on the hollow shaft. The rotor assembly includes a rotating shaft, a housing, and a magnetic ring. One end of the rotating shaft is rotatably inserted into the hollow shaft, and the other end is fixedly connected to the housing. The magnetic ring is fixedly disposed within the housing and surrounds the rotating shaft. The locking assembly is used to fix the rotor assembly and includes a locking protrusion, a locking groove, a mounting hole, a locking spring, and a locking block. The locking protrusion is fixedly disposed on the edge of the housing and opposite the stator base. The locking groove is formed on the side of the locking protrusion opposite the stator base. The mounting hole is formed on the edge of the stator base and faces the housing. The locking block is slidably inserted into the mounting hole. The locking spring is installed in the mounting hole and is used to push the locking block into the locking mechanism. The device includes a locking groove to fix the rotor assembly; it also includes a limiting component to limit the rotor assembly from exceeding the rotation range. The limiting component includes a limiting arc block and a moving arc block. The limiting arc block is fixedly disposed on the edge of the hollow shaft away from the stator base, and the moving arc block is fixedly disposed on the periphery of the end of the shaft connected to the housing. When the brushless motor is in the initial state, the concave surfaces of the limiting arc block and the moving arc block are opposite to each other. The locking groove is provided with a limiting component for limiting the locking block. The limiting component includes a limiting ring and connecting rods. There are two connecting rods, which are vertically fixed on both sides inside the locking groove. The two connecting rods are parallel to each other. The two sides of the limiting ring are fixedly connected to the two connecting rods respectively. The diameter of the limiting ring is smaller than the maximum diameter of the locking block in the initial state. Both the limiting ring and the connecting rods are elastic.

2. The brushless motor with a static locking structure according to claim 1, characterized in that, The locking block is spherical in shape, and the locking groove structure is adapted to the shape of the locking block.

3. The brushless motor with a static locking structure according to claim 1, characterized in that, The side of the moving arc block that contacts the limiting arc block has a snap-fit ​​groove for accommodating the limiting arc block.

4. The brushless motor with a static locking structure according to claim 1, characterized in that, The stator base has an installation notch on the side facing away from the hollow shaft.

5. A brushless motor with a static locking structure according to claim 1, characterized in that, The stator base has a sensing magnetic ring on the side opposite to the hollow shaft for sensing the position of the rotating shaft.

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