Hollow cup brushless motor

Abstract

The utility model discloses a hollow cup brushless motor relates to motor technical field. Hollow cup brushless motor includes casing, rotor subassembly, stator subassembly, circuit board subassembly, drive board subassembly and steel needle connecting piece, and the casing is equipped with rotating cavity and the connecting face of rotating cavity outside side, and rotor subassembly, stator subassembly and circuit board subassembly are located the inner wall of rotating cavity, and circuit board subassembly is electrically connected with stator subassembly, and circuit board subassembly is equipped with first terminal rack or second terminal rack, drive board subassembly is located the connecting face, and circuit board subassembly and drive board subassembly realize electric connection through steel needle connecting piece, wherein, hollow cup brushless motor has the hall control state without of steel needle connecting piece and first terminal rack connection, or, hollow cup brushless motor has the hall control state with of steel needle connecting piece and second terminal rack connection. The utility model provides technical scheme aims at realizing the purpose of motor miniaturization, and suitable two control modes simultaneously, and increase the flexibility of adjustment.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a hollow cup brushless motor. Background Technology

[0002] Coreless brushless motors are lightweight and compact. During operation, they can achieve high speed and efficiency, and run smoothly with low noise. They are often used in systems with high precision and performance requirements, such as communications, robotics, security, aerospace, and steering control systems.

[0003] In existing coreless brushless motors, the motor typically includes a housing, and a stator assembly, rotor assembly, circuit board assembly, and driver board assembly housed within the rotating cavity of the housing. The circuit board assembly and driver board assembly are integrated into the rotating cavity, making the space within the cavity overly cramped, prone to interference between components, and resulting in poor heat dissipation. To avoid interference, the space within the rotating cavity is usually increased; however, this increases the motor's size and cost. Furthermore, since the driver board assembly is a consumable component, its location within the rotating cavity hinders maintenance.

[0004] Meanwhile, coreless brushless motors are divided into Hall effect control and Hall effect control methods, depending on the control method used. When using Hall effect control, a Hall plate needs to be installed inside the motor, and the drive board assembly is connected to the Hall plate via wires. However, in Hall effect control, the drive board assembly is directly mounted on the end cover of the housing and electrically connected to the stator assembly, omitting the internal Hall plate. This inconsistency in the structure of coreless brushless motors under different control methods means that when users need to adjust the motor's control method, they must select a new coreless brushless motor to change the control method, increasing operational complexity and causing inconvenience. Utility Model Content

[0005] The main purpose of this invention is to propose a hollow cup brushless motor, which aims to achieve motor miniaturization and is applicable to two control methods, increasing the flexibility of adjustment.

[0006] To achieve the above objectives, this utility model proposes a hollow cup brushless motor, which includes:

[0007] A housing, wherein the housing is provided with a rotating cavity and a connecting surface located on the outer side of the rotating cavity;

[0008] A rotor assembly, wherein the rotor assembly is rotatably disposed within the rotating cavity;

[0009] A stator assembly, disposed on the inner wall of the rotating cavity, is used to drive the rotor assembly to rotate;

[0010] A circuit board assembly is disposed within the rotating cavity and electrically connected to the stator assembly. The circuit board assembly is provided with a first terminal block or a second terminal block.

[0011] A drive board assembly, wherein the drive board assembly is disposed on the connection surface; and

[0012] A steel pin connector, one end of which is electrically connected to the drive board assembly, and the other end of which is connected to the first terminal frame or the second terminal frame and electrically connected to the circuit board assembly, so that the circuit board assembly is electrically connected to the drive board assembly;

[0013] Wherein, the hollow cup brushless motor has a Hall-free control state where the steel pin connector is connected to the first terminal frame; or, the hollow cup brushless motor has a Hall-controlled state where the steel pin connector is connected to the second terminal frame.

[0014] In one embodiment, in the Hall-less control state, the circuit board assembly includes a terminal block and a first terminal frame. One side of the terminal block is electrically connected to the stator assembly, and the other side of the terminal block is provided with the first terminal frame. The first terminal frame is provided with at least three first insertion holes. The steel pin connector includes at least three, and one end of each steel pin connector is inserted into a first insertion hole and electrically connected to the terminal block.

[0015] In one embodiment, in the Hall control state, the circuit board assembly includes a Hall plate and a second terminal block. The Hall plate is provided with at least three Hall sensors, which are located on the side of the Hall plate facing the rotor assembly and electrically connected to the Hall plate. The Hall sensors are used to detect the rotation of the rotor assembly. The side of the Hall plate facing the rotor assembly is electrically connected to the stator assembly. The other side of the Hall plate is provided with the second terminal block, which is provided with at least eight first insertion holes. The steel pin connectors include at least eight, and one end of each steel pin connector is inserted into a first insertion hole and electrically connected to the Hall plate.

[0016] In one embodiment, the second terminal frame includes a first sub-frame and a second sub-frame disposed adjacent to the Hall plate, and both the first sub-frame and the second sub-frame are provided with the first insertion hole;

[0017] The first sub-frame has at least three first insertion holes, and the second sub-frame has five first insertion holes.

[0018] In one embodiment, the connecting surface has a first notch communicating with the rotating cavity. The first notch is correspondingly disposed with the first terminal frame or the second terminal frame, so that one end of the steel pin connector passes through the first notch and is electrically connected to the drive board assembly.

[0019] In one embodiment, the hollow cup brushless motor further includes a bracket disposed on the inner wall of the rotating cavity, one side of the bracket abutting against the stator assembly, the other side of the bracket forming a mounting surface, and the circuit board assembly being confined to the mounting surface, so that a first gap space is provided between the circuit board assembly and the inner wall of the connecting surface.

[0020] In one embodiment, the bracket is provided with a plurality of limiting posts in the circumferential direction, and the circuit board assembly is provided with a plurality of limiting grooves in the circumferential direction, and each of the limiting posts corresponds to a limiting groove.

[0021] When the circuit board assembly is disposed on the mounting surface, the limiting post is inserted into the limiting groove and aligned with the outer wall of the circuit board assembly along the circumferential direction of the circuit board assembly.

[0022] In one embodiment, the hollow cup brushless motor further includes a support ring disposed on the connecting surface. The support ring is disposed circumferentially along the connecting surface and has a support surface away from the connecting surface. The drive plate assembly is disposed on the support surface so that there is a second gap space between the drive plate assembly and the connecting surface.

[0023] In one embodiment, the first notch is provided along the periphery of the connecting surface, and the support ring is provided with a second notch corresponding to the first notch.

[0024] In one embodiment, a cable is provided on the side of the drive board assembly facing away from the connecting surface. The cable and the steel pin connector are symmetrically arranged on both sides of the drive board assembly, and the cable is used to connect with other devices.

[0025] This invention's technical solution integrates the circuit board assembly within the rotating cavity and the drive board assembly externally on the connecting surface of the housing. A steel pin connector connects the circuit board assembly and the drive board assembly, achieving a structure where the circuit board is internal and the drive board is external. This reduces interference between the circuit board and drive board assemblies, lowers the space occupied by the rotating cavity, and reduces the size of the coreless brushless motor. Furthermore, the external drive board assembly facilitates replacement and maintenance. Secondly, when the steel pin connector is connected to the circuit board assembly with the first terminal block, the coreless brushless motor uses a Hall-effect-free control mode; while when the steel pin connector is connected to the circuit board assembly with the second terminal block, the coreless brushless motor uses a Hall-effect control mode. This allows the coreless brushless motor to flexibly switch between the two states simply by changing the circuit board assembly model, effectively solving the problem of structural inconsistencies caused by different control methods in existing technologies. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 A schematic diagram of a hollow cup brushless motor according to an embodiment of the present invention;

[0028] Figure 2 This is a partial exploded view of a hollow cup brushless motor.

[0029] Figure 3 This is a cross-sectional view of a hollow cup brushless motor.

[0030] Figure 4 This is a partial structural diagram of a hollow cup brushless motor when the circuit board assembly is a terminal block.

[0031] Figure 5 This is a partial structural diagram of a hollow cup brushless motor when the circuit board assembly is a Hall plate.

[0032] Figure 6 This is a partial structural diagram from another perspective when the circuit board assembly of a hollow cup brushless motor is a Hall plate.

[0033] Figure 7 This is a partial structural diagram from another perspective when the circuit board assembly of a hollow cup brushless motor is a Hall plate.

[0034] Figure 8 for Figure 7 Exploded view of the middle section of the structure.

[0035] Explanation of icon numbers:

[0036] 100. Hollow Cup Brushless Motor; 1. Housing; 11. Main Body; 111. Rotating Cavity; 112. Opening; 12. Rear End Cover; 121. Connecting Surface; 122. First Gap Space; 123. First Notch; 124. Base; 125. Lug; 126. Second Through Hole; 2. Rotor Assembly; 21. Shaft; 22. Magnetic Ring; 3. Stator Assembly; 31. Iron Core; 32. Armature Coil Cup; 4. Circuit Board Assembly; 41. Limiting Slot; 42. Hall Sensor; 4 31. First terminal block; 4311. First insertion hole; 432. Second terminal block; 4321. First sub-frame; 4322. Second sub-frame; 45. First through hole; 46. Terminal block; 47. Hall plate; 5. Drive board assembly; 51. Cable; 53. Positioning hole; 6. Steel pin connector; 7. Bracket; 71. Mounting surface; 72. Baffle; 73. Limiting post; 8. Support ring; 81. Second interval space; 82. Support surface; 83. Positioning post; 84. Second notch.

[0037] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0039] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0040] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0041] Coreless brushless motors are lightweight and compact. During operation, they can achieve high speed and efficiency, and run smoothly with low noise. They are often used in systems with high precision and performance requirements, such as communications, robotics, security, aerospace, and steering control systems.

[0042] In existing coreless brushless motors, the motor typically includes a housing, and a stator assembly, rotor assembly, circuit board assembly, and driver board assembly housed within the rotating cavity of the housing. The circuit board assembly and driver board assembly are integrated into the rotating cavity, making the space within the cavity overly cramped, prone to interference between components, and resulting in poor heat dissipation. To avoid interference, the space within the rotating cavity is usually increased; however, this increases the motor's size and cost. Furthermore, since the driver board assembly is a consumable component, its location within the rotating cavity hinders maintenance.

[0043] Meanwhile, coreless brushless motors are divided into Hall effect control and Hall effect control methods, depending on the control method used. When using Hall effect control, a Hall plate needs to be installed inside the motor, and the drive board assembly is connected to the Hall plate via wires. However, in Hall effect control, the drive board assembly is directly mounted on the end cover of the housing and electrically connected to the stator assembly, omitting the internal Hall plate. This inconsistency in the structure of coreless brushless motors under different control methods means that when users need to adjust the motor's control method, they must select a new coreless brushless motor to change the control method, increasing operational complexity and causing inconvenience.

[0044] The main purpose of this utility model is to propose a hollow cup brushless motor 100, which aims to achieve the goal of motor miniaturization and simultaneously apply two control methods, increasing the flexibility of adjustment.

[0045] Please see Figures 1 to 8 In one embodiment of the present invention, the hollow cup brushless motor 100 includes a housing 1, a rotor assembly 2, a stator assembly 3, a circuit board assembly 4, a drive board assembly 5, and a steel pin connector 6. The housing 1 has a rotating cavity 111 and a connecting surface 121 located outside the rotating cavity 111; the rotor assembly 2 is rotatably disposed in the rotating cavity 111; the stator assembly 3 is disposed on the inner wall of the rotating cavity 111 and is used to drive the rotor assembly 2 to rotate; the circuit board assembly 4 is disposed in the rotating cavity 111 and is electrically connected to the stator assembly 3, and the circuit board assembly 4 is provided with a first terminal frame 431 or a second terminal frame 432; the drive board assembly 5 is disposed on the connecting surface 121; one end of the steel needle connector 6 is electrically connected to the drive board assembly 5, and the other end of the steel needle connector 6 is connected to the first terminal frame 431 or the second terminal frame 432 and is electrically connected to the circuit board assembly 4, so that the circuit board assembly 4 is electrically connected to the drive board assembly 5; wherein, the hollow cup brushless motor 100 has a Hall-free control state in which the steel needle connector 6 is connected to the first terminal frame 431; or, the hollow cup brushless motor 100 has a Hall-controlled state in which the steel needle connector 6 is connected to the second terminal frame 432.

[0046] The technical solution of this utility model integrates the circuit board assembly 4 within the rotating cavity 111 and the drive board assembly 5 externally on the connecting surface 121 of the housing 1. A steel pin connector 6 connects the circuit board assembly 4 and the drive board assembly 5, achieving a structure where the circuit board is internal and the drive board is external. This reduces interference between the circuit board assembly 4 and the drive board assembly 5, reduces the space occupied by the rotating cavity 111, and decreases the size of the hollow cup brushless motor 100. Furthermore, the external drive board assembly 5 facilitates replacement and maintenance. Secondly, when the steel pin connector 6 is connected to the circuit board assembly 4 with the first terminal frame 431, the hollow cup brushless motor 100 uses a Hall-effect-free control mode; while when the steel pin connector 6 is connected to the circuit board assembly 4 with the second terminal frame 432, the hollow cup brushless motor 100 uses a Hall-effect-free control mode. This allows the hollow cup brushless motor 100 to flexibly switch between the two states simply by changing the model of the circuit board assembly 4, effectively solving the problem of structural inconsistency caused by different control methods in the prior art.

[0047] In this embodiment, the housing 1 forms the structural basis of the hollow cup brushless motor 100. The housing 1 has an internal rotating cavity 111 for accommodating the rotor assembly 2 and the stator assembly 3. The stator assembly 3 is mounted on the inner wall of the rotating cavity 111 and drives the rotor assembly 2 to rotate via electromagnetic induction, providing power. The circuit board assembly 4 is also placed within the rotating cavity 111 and is electrically connected to the stator assembly 3 to control the stator assembly 3, ensuring stable operation of the hollow cup brushless motor 100. The drive board assembly 5 is mounted on the connecting surface 121 of the housing 1 and is connected to the circuit board assembly 4 via a steel pin connector 6, achieving electrical connection between the circuit board assembly 4 and the drive board assembly 5.

[0048] Meanwhile, when the steel pin connector 6 is connected to the circuit board assembly 4 with the first terminal frame 431, the motor is in a Hall-free control state; while when the steel pin connector 6 is connected to the circuit board assembly 4 with the second terminal frame 432, the motor is in a Hall-controlled state. Understandably, users only need to change the model of the circuit board assembly 4, without making large-scale modifications to other components of the hollow cup brushless motor 100, to achieve switching between different control methods. This effectively solves the problem of structural inconsistency caused by different control methods in the prior art, greatly improving versatility.

[0049] Optionally, an insulating material may be fitted on the outside of the steel pin connector 6 to prevent accidental contact between the steel pin connector 6 and other electronic components or contact terminals.

[0050] Optionally, the first terminal block 431 and the second terminal block 432 may be made of insulating material to prevent electrical short circuits, and may also be designed to have a certain degree of elasticity to provide appropriate clamping force when the steel needle connector 6 is inserted, thereby enhancing the stability of the connection.

[0051] Understandably, the drive board is a consumable component. By placing it on the outside of the rotating cavity 111, it is easy to disassemble and repair. If the drive board were built-in, when the size of the coreless brushless motor 100 is small and Hall effect control is required, the electronic components on the circuit board assembly 4 might not be able to fit. Meanwhile, the steel pin connector 6 has higher reliability than the cable 51, avoiding potential contact problems that may occur with the cable 51 during long-term use. It also simplifies the connection process, reduces space occupation, and makes the coreless brushless motor 100 easier to assemble and maintain. It should be noted that the first terminal bracket 431 and the second terminal bracket 432 provide a stable mounting platform for the steel pin connector 6, which helps improve the robustness of the connection between the circuit board assembly 4 and the drive board assembly 5. At the same time, the placement of the first terminal bracket 431 and the second terminal bracket 432 also facilitates the insertion, removal, and replacement of the steel pin connector 6, making the maintenance of the coreless brushless motor 100 easier.

[0052] In one implementation, please refer to Figure 3 The stator assembly 3 includes a stator core 31 and an armature coil cup 32. The stator core 31 is arranged around the inner wall of the rotating cavity 111 and abuts against the circuit board assembly 4. The armature coil cup 32 is arranged on the inner wall of the core 31 and is electrically connected to the circuit board assembly 4.

[0053] In this embodiment, the stator core 31 is typically made of silicon steel sheets stacked into a ring and mounted on the inner wall of the rotating cavity 111 to generate a magnetic field. The armature coil cup 32 is mounted on the inner side of the stator core 31 and is typically composed of multiple windings to conduct current and interact with the magnetic field of the rotor assembly 2.

[0054] In one implementation, please refer to Figure 3 The rotor assembly 2 includes a rotating shaft 21 disposed in the rotating cavity 111 and a magnetic ring 22 sleeved on the rotating shaft 21.

[0055] In this embodiment, the rotating shaft 21 is rotatably disposed within the rotating cavity 111 to support the magnetic ring 22 and transmit torque. The magnetic ring 22 is sleeved on the rotating shaft 21 and is typically made of permanent magnet material. It is used to generate a rotating magnetic field and interact with the armature coil of the stator assembly 3 to drive the rotating shaft 21 to rotate.

[0056] In one implementation, please refer to Figure 4 In the absence of Hall effect control, the circuit board assembly 4 includes a terminal block 46 and a first terminal frame 431. One side of the terminal block 46 is electrically connected to the stator assembly 3, and the other side of the terminal block 46 is provided with the first terminal frame 431. The first terminal frame 431 is provided with at least three first insertion holes 4311. The steel pin connector 6 includes at least three, and one end of each steel pin connector 6 is inserted into a first insertion hole 4311 and electrically connected to the terminal block 46.

[0057] In this embodiment, in the Hall-less control state, one side of the terminal block 46 is electrically connected to the stator assembly 3 to transmit drive signals to the stator assembly 3, thereby driving the rotor assembly 2 to rotate. The other side of the terminal block 46 is provided with a first terminal frame 431, which has at least three first insertion holes 4311 for inserting steel pin connectors 6. The number of steel pin connectors 6 is at least three, with one end of each steel pin connector 6 inserted into a first insertion hole 4311 and electrically connected to the terminal block 46, ensuring that the drive signal can be stably transmitted to the stator assembly 3.

[0058] Understandably, at this time, the three steel needle connectors 6 are used to transmit the current signal of the armature coil cup 32.

[0059] In one implementation, please refer to Figure 4 The first terminal block 431 is arranged along the periphery of the terminal block 46.

[0060] In this embodiment, the first terminal bracket 431 is located at the periphery of the wiring board 46, which helps the steel pin connector 6 to come into contact with the external environment and improves heat dissipation efficiency.

[0061] Optionally, the first terminal block 431 can be detachably mounted on the terminal block 46, facilitating quick assembly and disassembly for maintenance or replacement without damaging the terminal block 46. Furthermore, the shape and size of the terminal block can be customized according to the specific shape and size of the terminal block 46 to achieve optimal layout.

[0062] Optionally, the first insertion holes 4311 are evenly spaced along the circumferential direction of the first terminal block 431. This makes the wiring neat and reduces interference between the steel pin connectors 6.

[0063] In one implementation, please refer to Figure 5 and Figure 6 In Hall control mode, the circuit board assembly 4 includes a Hall plate 47 and a second terminal block 432. The Hall plate 47 is provided with at least three Hall sensors 42, which are located on the side of the Hall plate 47 facing the rotor assembly 2 and are electrically connected to the Hall plate 47. The Hall sensors 42 are used to detect the rotation of the rotor assembly 2. The side of the Hall plate 47 facing the rotor assembly 2 is electrically connected to the stator assembly 3. The other side of the Hall plate 47 is provided with a second terminal block 432, which is provided with at least eight first insertion holes 4311. The steel pin connector 6 includes at least eight, and one end of each steel pin connector 6 is inserted into a first insertion hole 4311 and electrically connected to the Hall plate 47.

[0064] In this embodiment, under Hall control, at least three Hall sensors 42 are mounted on the Hall plate 47. These three Hall sensors 42 are located on the side of the Hall plate 47 facing the rotor assembly 2 and are electrically connected to the Hall plate 47. The Hall sensors 42 are used to detect the rotation of the rotor assembly 2, providing necessary position feedback information for the control of the hollow cup brushless motor 100. This side of the Hall plate 47 is also electrically connected to the stator assembly 3 to transmit the detected position information of the rotor assembly 2 to the stator assembly 3, thereby achieving control of the rotor assembly 2. A second terminal frame 432 is mounted on the other side of the Hall plate 47. The second terminal frame 432 has at least eight first insertion holes 4311 for connecting to steel pin connectors 6. There are at least eight steel pin connectors 6, with one end of each connector inserted into a first insertion hole 4311 and electrically connected to the Hall plate 47, thereby ensuring that the signals detected by the Hall sensors 42 can be stably transmitted to the drive board assembly 5.

[0065] Understandably, the three steel pin connectors 6 are used to transmit the current signal of the armature coil cup 32, and the five steel pin connectors 6 are used to transmit the rotor rotation signal detected by the Hall sensor 42 and to provide power to the Hall sensor 42.

[0066] In one implementation, please refer to Figure 5 and Figure 6 The second terminal block 432 is arranged along the periphery of the Hall plate 47.

[0067] In this embodiment, the second terminal bracket 432 is located at the periphery of the Hall plate 47, which helps the steel pin connector 6 to come into contact with the external environment and improves heat dissipation efficiency.

[0068] In one implementation, please refer to Figure 5 and Figure 6 The second terminal frame 432 includes a first sub-frame 4321 and a second sub-frame 4322 adjacent to the Hall plate 47. Both the first sub-frame 4321 and the second sub-frame 4322 are provided with first insertion holes 4311. Specifically, the first sub-frame 4321 is provided with at least three first insertion holes 4311, and the second sub-frame 4322 is provided with five first insertion holes 4311.

[0069] In this embodiment, the second terminal frame 432 includes a first sub-frame 4321 and a second sub-frame 4322. The first sub-frame 4321 and the second sub-frame 4322 are independent of each other and are respectively connected to the steel pin connector 6. The structures of the first sub-frame 4321 and the second sub-frame 4322 are identical to those of the first terminal frame 431; that is, the second terminal frame 432 includes two first terminal frames 431. Since the Hall plate 47 is additionally equipped with a Hall sensor 42, an additional steel pin connector 6 is required to transmit the signal. This modular design allows for the addition of a single first terminal frame 431 when the number of first insertion holes 4311 needs to be increased.

[0070] Understandably, when using Hall effect control, at least eight steel pin connectors 6 are required. Three steel pin connectors 6 are used to transmit the current signal of the armature coil cup 32, and five steel pin connectors 6 are used to transmit the rotor rotation signal detected by the Hall sensor 42. Therefore, three steel pin connectors 6 are inserted into the first sub-frame 4321, and five steel pin connectors 6 are inserted into the second sub-frame 4322.

[0071] Alternatively, both the first sub-frame 4321 and the second sub-frame 4322 can be fitted with four steel pin connectors 6, but this setup would increase the wiring complexity on the Hall plate 47.

[0072] In one implementation, please refer to Figure 2 and Figure 3The housing 1 includes a main body 11 and a rear end cover 12. The main body 11 forms a rotating cavity 111 and an opening 112 communicating with the rotating cavity 111. The rear end cover 12 is disposed in the opening 112, and a connecting surface 121 is formed on the side of the rear end cover 12 facing away from the rotating cavity 111.

[0073] In this embodiment, the main body 11 of the housing 1 forms a rotating cavity 111 for accommodating the rotor assembly 2 and the stator assembly 3. The rear end cover 12 is installed at the opening 112 of the main body 11, and the side of the rear end cover 12 facing away from the rotating cavity 111 forms a connecting surface 121 for mounting the drive plate assembly 5.

[0074] Optionally, the main body 11 and the rear cover 12 can be fixed by means of threaded connection, snap-fit ​​connection or welding to ensure the overall strength and sealing of the housing 1.

[0075] In one implementation, please refer to Figure 7 and Figure 8 The hollow cup brushless motor 100 also includes a bracket 7 disposed on the inner wall of the rotating cavity 111. One side of the bracket 7 abuts against the stator assembly 3, and the other side of the bracket 7 forms a mounting surface 71. The circuit board assembly 4 is limited to the mounting surface 71 so that a first gap space 122 is provided between the circuit board assembly 4 and the inner wall of the connecting surface 121.

[0076] In this embodiment, the bracket 7 is installed on the inner wall of the rotating cavity 111. One side of the bracket 7 abuts against the stator assembly 3, and the other side forms a mounting surface 71 for fixing and mounting the circuit board assembly 4. The baffle 72 corresponds to the first notch 123 of the rear end cover 12 and is used to prevent the steel pin connector 6 from shifting during operation and accidentally contacting other electronic components or contact terminals. The first gap space 122 is used to prevent electronic components or contact terminals on the circuit board assembly 4 from contacting the connection surface 121, thereby causing a short circuit. At the same time, the first gap space 122 also facilitates the installation of the hollow cup brushless motor 100.

[0077] In one implementation, please refer to Figure 7 and Figure 8 The hollow cup brushless motor 100 also includes a support ring 8 disposed on the connecting surface 121. The support ring 8 is disposed circumferentially along the connecting surface 121 and has a support surface 82 away from the connecting surface 121. The drive plate assembly 5 is disposed on the support surface 82 so that there is a second gap space 81 between the drive plate assembly 5 and the connecting surface 121.

[0078] In this embodiment, the drive plate assembly 5 is mounted on the support surface 82 of the support ring 8, forming a second gap space 81 between it and the connecting surface 121 of the housing 1. This allows the distance between the drive plate assembly 5 and the connecting surface 121 to be adjusted by changing the height of the support ring 8, thereby adapting to different installation requirements and improving installation flexibility. Furthermore, since the support ring 8 and the housing 1 are independently machined, the machining complexity of the housing 1 is not increased.

[0079] Optionally, the support ring 8 can be made of aluminum alloy or plastic to improve its support strength and durability, while reducing the overall weight of the hollow cup brushless motor 100. The drive plate assembly 5 can be modularly designed according to actual needs to facilitate replacement and maintenance.

[0080] In one implementation, please refer to Figure 1 and Figure 2 The support ring 8 is provided with a positioning post 83 protruding from the support surface 82, and the drive plate assembly 5 is provided with a positioning hole 53 corresponding to the positioning post 83. The drive plate assembly 5 is supported on the support surface 82, and the positioning post 83 is limited to the positioning hole 53.

[0081] In this embodiment, when the drive plate assembly 5 is installed on the support surface 82, the positioning pin 83 is inserted into the positioning hole 53, thereby achieving stable support and limiting contact of the drive plate assembly 5 on the support ring 8. This ensures the positional accuracy of the drive plate assembly 5 during installation, prevents displacement or shaking during operation, and improves the reliability of the hollow cup brushless motor 100.

[0082] Optionally, the positioning post 83 can be configured in various shapes, such as cylindrical, square, or with external threads, to adapt to different positioning requirements. The shape and size of the positioning hole 53 match the positioning post 83 to ensure a tight connection. Furthermore, an interference fit can be used between the positioning post 83 and the positioning hole 53 to enhance the stability of the connection. Understandably, the cooperation between the positioning post 83 and the positioning hole 53 simplifies the installation process of the drive board assembly 5 and improves installation efficiency.

[0083] In one implementation, please refer to Figure 1 and Figure 2 The positioning post 83 includes two, which are symmetrically arranged on both sides of the support ring 8 along the circumferential direction of the drive plate assembly 5. The distance between the two positioning posts 83 and the cable 51 is equal.

[0084] In this embodiment, two positioning posts 83 are symmetrically arranged on both sides of the support ring 8 to balance the force between the drive plate assembly 5 and the support ring 8, and to ensure the stability of the drive plate assembly 5 during operation.

[0085] Understandably, the equal distances between the two positioning posts 83 and the cable 51, forming a symmetrical arrangement, enhance structural stability and ensure that the drive board assembly 5 is evenly stressed after installation, reducing the risk of loosening due to uneven stress. Simultaneously, the symmetrical arrangement facilitates positioning and installation during production and assembly, improving production efficiency.

[0086] In one implementation, please refer to Figure 7 and Figure 8 The connecting surface 121 has a first notch 123 that communicates with the rotating cavity 111. The first notch 123 is correspondingly provided with the first terminal frame 431 or the second terminal frame 432 so that one end of the steel needle connector 6 passes through the first notch 123 and is electrically connected to the drive board assembly 5.

[0087] In this embodiment, a first notch 123 communicating with the rotating cavity 111 is also provided on the connecting surface 121. The position of the first terminal frame 431 or the second terminal frame 432 corresponds to the first notch 123, so that the steel pin connector 6 can pass smoothly through the first notch 123 to realize the electrical connection between the circuit board assembly 4 and the drive board assembly 5.

[0088] Understandably, the guiding effect of the first notch 123 allows the steel needle connector 6 to be led out from the same point, which facilitates the installation of the steel needle connector 6 and improves the assembly efficiency.

[0089] Optionally, the first notch 123 can be located in the middle region of the connecting surface 121. In this case, the first notch 123 directly connects the rotating cavity 111 and the first interval space 122, allowing one end of the steel needle connector 6 to extend from the rotating cavity 111, pass through the first notch 123 and the second interval space 81, and directly connect to the drive board assembly 5. At this time, the steel needle connector 6 is located inside the support ring 8. Although it can achieve electrical connection between the drive board assembly 5 and the circuit board assembly 4, the heat dissipation performance is poor.

[0090] In one implementation, please refer to Figure 2 , Figure 7 and Figure 8 The first notch 123 is provided along the periphery of the connecting surface 121, and the support ring 8 is provided with a second notch 84 corresponding to the first notch 123.

[0091] In this embodiment, the first notch 123 is located at the periphery of the connecting surface 121, and the second notch 84 on the support ring 8 communicates with the second spacing space 81. The first notch 123 and the second notch 84 are either corresponding to the first terminal frame 431 or the second terminal frame 432, so that the steel pin connector 6 can start from the first terminal frame 431 or the second terminal frame 432, pass through the second notch 84 and the first notch 123 in sequence, and finally achieve electrical connection with the drive board assembly 5. It can be understood that this arrangement, while achieving electrical connection, also allows the steel pin connector 6 to fully contact the external environment, improving heat dissipation performance.

[0092] In one implementation, please refer to Figure 8 The bracket 7 is provided with multiple limiting posts 73 in the circumferential direction, and the circuit board assembly 4 is provided with multiple limiting grooves 41 in the circumferential direction, and each limiting post 73 corresponds to a limiting groove 41; wherein, when the circuit board assembly 4 is placed on the mounting surface 71, the limiting post 73 is inserted into the limiting groove 41, and along the circumferential direction of the circuit board assembly 4, the limiting post 73 is aligned with the outer wall of the circuit board assembly 4.

[0093] In this embodiment, the bracket 7 is provided with multiple limiting posts 73 in the circumferential direction, and the circuit board assembly 4 is provided with multiple limiting grooves 41 in the circumferential direction, with each corresponding to the other. When the circuit board assembly 4 is installed on the mounting surface 71 of the bracket 7, the limiting posts 73 are inserted into the limiting grooves 41 to ensure the circuit board assembly 4 is fixed and to prevent the circuit board assembly 4 from shifting during operation.

[0094] Understandably, the alignment of the limiting post 73 with the outer wall of the circuit board assembly 4 further enhances the compactness of the structure and reduces the volume occupied.

[0095] Alternatively, the limiting post 73 can also be configured as a flexible snap-fit, which facilitates installation and removal.

[0096] In one implementation, please refer to Figure 8 The circuit board assembly 4 has a first through hole 45, and the rear end cover 12 has a second through hole 126 corresponding to the first through hole 45. A bearing is provided in the second through hole 126, and one end of the rotating shaft 21 is movably inserted through the first through hole 45 and the second through hole 126. The bearing is sleeved on the outer wall of the rotating shaft 21.

[0097] In this embodiment, the circuit board assembly 4 has a first through hole 45, while the rear end cover 12 has a corresponding second through hole 126. A bearing is installed inside the second through hole 126, and the inner ring of the bearing is tightly fitted with the outer wall of the rotating shaft 21. One end of the rotating shaft 21 passes through the first through hole 45 and the second through hole 126 in sequence and can rotate freely within them. In this way, the friction between the rotating shaft 21 and the rear end cover 12 is reduced by the support of the bearing, thereby improving the operating efficiency of the motor.

[0098] In one implementation, please refer to Figure 7 and Figure 8 The rear cover 12 includes a base portion 124 and a hook portion 125 located at one end of the base portion 124. The base portion 124 is inserted into the rotating cavity 111 so that the hook portion 125 abuts against the opening 112 of the main body portion 11. A connecting surface 121 is formed on the side of the base portion 124 facing away from the rotating cavity 111. A first gap space 122 is provided between the side of the base portion 124 away from the hook portion 125 and the circuit board body.

[0099] In this embodiment, the rear end cover 12 includes a base portion 124 and a hook portion 125. The base portion 124 is inserted into the rotating cavity 111, and the hook portion 125 can just abut against the opening 112 of the main body portion 11, thereby ensuring that the rear end cover 12 can fit tightly against the main body portion 11. A connecting surface 121 is formed on the side of the base portion 124 facing away from the rotating cavity 111 for mounting the drive board assembly 5. A first gap space 122 is provided between the circuit board assembly 4 and the rear end cover 12 to prevent electronic components or contact terminals on the circuit board assembly 4 from contacting the rear end cover 12, thereby causing a short circuit.

[0100] In one implementation, please refer to Figure 1 and Figure 2 A cable 51 is provided on the side of the drive board assembly 5 facing away from the connection surface 121. The cable 51 and the steel needle connector 6 are symmetrically arranged on both sides of the drive board assembly 5. The cable 51 is used to connect with other devices.

[0101] In this embodiment, a cable 51 is provided on the side of the drive board assembly 5 away from the support surface 82. The cable 51 and the steel needle connector 6 are symmetrically arranged on both sides of the drive board assembly 5 to balance the force and ensure the stability of the drive board assembly 5 during operation.

[0102] Understandably, this not only improves the aesthetics of the hollow cup brushless motor 100, but also optimizes the spatial layout, avoids contact between the cable 51 and the steel pin connector 6, and ensures the orderly flow of the circuit.

[0103] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A hollow cup brushless motor, characterized in that, The hollow cup brushless motor includes: A housing, wherein the housing is provided with a rotating cavity and a connecting surface located on the outer side of the rotating cavity; A rotor assembly, wherein the rotor assembly is rotatably disposed within the rotating cavity; A stator assembly, disposed on the inner wall of the rotating cavity, is used to drive the rotor assembly to rotate; A circuit board assembly is disposed within the rotating cavity and electrically connected to the stator assembly. The circuit board assembly is provided with a first terminal block or a second terminal block. A drive board assembly, wherein the drive board assembly is disposed on the connection surface; and A steel pin connector, one end of which is electrically connected to the drive board assembly, and the other end of which is connected to the first terminal frame or the second terminal frame and electrically connected to the circuit board assembly, so that the circuit board assembly is electrically connected to the drive board assembly; Wherein, the hollow cup brushless motor has a Hall-free control state where the steel pin connector is connected to the first terminal frame; or, the hollow cup brushless motor has a Hall-controlled state where the steel pin connector is connected to the second terminal frame.

2. The hollow cup brushless motor as described in claim 1, characterized in that, In the Hall-less control state, the circuit board assembly includes a terminal block and a first terminal frame. One side of the terminal block is electrically connected to the stator assembly, and the other side of the terminal block is provided with the first terminal frame. The first terminal frame is provided with at least three first insertion holes. The steel pin connector includes at least three, and one end of each steel pin connector is inserted into a first insertion hole and electrically connected to the terminal block.

3. The hollow cup brushless motor as described in claim 1, characterized in that, In the Hall control state, the circuit board assembly includes a Hall plate and a second terminal block. The Hall plate is provided with at least three Hall sensors, which are located on the side of the Hall plate facing the rotor assembly and are electrically connected to the Hall plate. The Hall sensors are used to detect the rotation of the rotor assembly. The side of the Hall plate facing the rotor assembly is electrically connected to the stator assembly. The other side of the Hall plate is provided with the second terminal block, which is provided with at least eight first insertion holes. The steel pin connectors include at least eight, and one end of each steel pin connector is inserted into one of the first insertion holes and electrically connected to the Hall plate.

4. The hollow cup brushless motor as described in claim 3, characterized in that, The second terminal frame includes a first sub-frame and a second sub-frame adjacent to the Hall plate, and both the first sub-frame and the second sub-frame are provided with the first insertion hole; The first sub-frame has at least three first insertion holes, and the second sub-frame has five first insertion holes.

5. The hollow cup brushless motor as described in any one of claims 1 to 4, characterized in that, The connecting surface has a first notch that communicates with the rotating cavity. The first notch is correspondingly arranged with the first terminal frame or the second terminal frame so that one end of the steel pin connector passes through the first notch and is electrically connected to the drive board assembly.

6. The hollow cup brushless motor as described in claim 5, characterized in that, The hollow cup brushless motor also includes a bracket disposed on the inner wall of the rotating cavity. One side of the bracket abuts against the stator assembly, and the other side of the bracket forms a mounting surface. The circuit board assembly is confined to the mounting surface, so that a first gap space is provided between the circuit board assembly and the inner wall of the connecting surface.

7. The hollow cup brushless motor as described in claim 6, characterized in that, The bracket is provided with multiple limiting posts in the circumferential direction, and the circuit board assembly is provided with multiple limiting grooves in the circumferential direction, with each limiting post corresponding to a limiting groove. When the circuit board assembly is disposed on the mounting surface, the limiting post is inserted into the limiting groove and aligned with the outer wall of the circuit board assembly along the circumferential direction of the circuit board assembly.

8. The hollow cup brushless motor as described in claim 6, characterized in that, The hollow cup brushless motor further includes a support ring disposed on the connecting surface. The support ring is arranged circumferentially along the connecting surface and has a support surface away from the connecting surface. The drive plate assembly is disposed on the support surface so that there is a second gap space between the drive plate assembly and the connecting surface.

9. The hollow cup brushless motor as described in claim 8, characterized in that, The first notch is provided along the periphery of the connecting surface, and the support ring is provided with a second notch corresponding to the first notch.

10. The hollow cup brushless motor as described in claim 1, characterized in that, The drive board assembly has a cable on the side facing away from the connection surface. The cable and the steel pin connector are symmetrically arranged on both sides of the drive board assembly. The cable is used to connect with other devices.

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