Easily-assembled static magnetic outer rotor direct current brushless motor

Abstract

The utility model provides a static magnetic outer rotor direct current brushless motor easy to assemble, and relates to the technical field of motors. Comprising a first end cover and a second end cover, the second end cover is provided with a shaft hole, and a main shaft is pressed into the shaft hole after being punched by eight centistokes; a first glue hiding groove and a second glue hiding groove are formed in the inner walls, making contact with the magnets, of the first end cover and the second end cover respectively, insulation paper is pasted to the contact face of the PCB and the first support, and the PCB is matched with the grooves of the first support through assembly fool-proof grooves. According to the utility model, by adopting the square sintered boron magnet with 12 slots and 14 poles, the cogging torque is effectively reduced, so that the noise level during the operation of the motor is reduced, the effect that the motor operates more quietly and stably is realized, and meanwhile, the connection stability between the main shaft and the end cover is enhanced by adopting the design that the main shaft is pressed into the two shaft holes of the end cover after being punched into eight centistokes, so that the service life of the main shaft is prolonged. And the motor can better bear various forces in the operation process.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field especially relates to an easy assembly static magnetic outer rotor direct current brushless motor. BACKGROUND

[0002] The micro motor is used for automobile electric sliding door product, voltage DC12.0V / DC24.0V, has the characteristics of small size (motor diameter 58.0mm, motor length 34.0mm), big torque, assembly foolproof, with PCB board (with wire harness), with 4PCS peeling.

[0003] Because of the automobile electric door motor in the market, it needs big torque, small noise, assembly position flatness precision requirement, but the automobile electric door motor in the market currently, there is not enough torque, the risk of jam when opening door, motor tooth groove torque is relatively big, noise is relatively big, because this kind of motor is assembled to the whole vehicle, the support is big, but the assembly position flatness precision requirement is precise, and the processing difficulty is big. The automobile electric sliding door motor market urgently needs a motor with extremely low noise, assembly position flatness that can meet the requirements and cost saving to adapt to product competition.

[0004] Based on this requirement, the utility model provides an easy assembly static magnetic outer rotor direct current brushless motor, two peeling are used to support motor rotor operation and provide output torque, and one peeling is added to the front and rear ends of the motor after assembly for the whole motor assembly in the vehicle, especially one peeling is added to the gear end to better support the motor in the vehicle and cooperate with the gear in the vehicle to drive the automobile sliding door to run stably, thereby reducing the risk of jam. Utility model content

[0005] In order to solve the above problems, the utility model provides an easy assembly static magnetic outer rotor direct current brushless motor to more accurately solve the above-mentioned problems of supporting motor rotor operation by two peeling, providing output torque, adding one peeling to the front and rear ends of the motor after assembly for the whole motor assembly in the vehicle, especially adding one peeling to the gear end to better support the motor in the vehicle and cooperate with the gear in the vehicle to drive the automobile sliding door to run stably, thereby reducing the risk of jam.

[0006] The utility model realizes the following technical scheme: end cover one and end cover two, the end cover two is equipped with shaft hole, the main shaft hits eight centimeters and is pressed into the shaft hole, the inner wall of end cover one and end cover two and magnet contact is equipped with hide glue groove one and hide glue groove two respectively;

[0007] Further, the PCB board is pasted with insulating paper on the contact surface of the support one, the PCB board is matched with the recess of the support one through the assembly foolproof groove, and the positioning convex groove on the PCB board is matched with the support assembly positioning groove of the support one;

[0008] The bracket one is provided with a concave bracket assembly positioning groove, the bracket assembly positioning groove extends to the bottom plane of the bracket, and the bracket one is provided with grooves at the front and rear positions of the bracket;

[0009] Four bearings, two of which are used for supporting the motor rotor, the other two are arranged at the front and rear ends of the motor respectively, one bearing is arranged at the gear end, and a bearing is arranged in close fit with the main shaft.

[0010] Further, the magnet is designed as 12-slot 14-pole, and the end cover one and the end cover two are provided with magnetic isolation teeth.

[0011] Further, the outer side of the main shaft is provided with a chip, the outer side of the chip is provided with a winding, the winding and the chip are core components for realizing electromagnetic conversion of the motor, glue is added to the inner hole of the chip after the winding is wound, the chip is aligned with the bracket assembly positioning convex point of the bracket one and the positioning groove of the stator chip, and the UVW and the wire tail common end of the winding are welded on the corresponding pads of the PCB board.

[0012] Further, the outer side of the main shaft is provided with a wave-shaped gasket.

[0013] Further, one side of the PCB board is provided with an insulating sleeve, and the insulating sleeve is connected with one side of the contact surface of the controller and the bridge line.

[0014] Further, the main shaft is provided with a clamp spring, and the main shaft is provided with a gear at the shaft outlet end.

[0015] Further, the bottom of the bracket one is provided with a convex small plane.

[0016] Further, the PVC hose is used for wrapping and protecting nine lead wires of the motor, the wire harness sleeve is provided with two clamping positions, and the wire harness is fixed by cooperating with the corresponding mechanism of the complete machine, and one side of the PVC hose is provided with a wire connector connected with the wire harness.

[0017] The utility model discloses beneficial effects:

[0018] 1. In the utility model, through adopting the square sintered boron magnet of 12-slot 14-pole design, the cogging torque is effectively reduced, thereby the noise level when the motor operates is reduced, and the effect that the motor operates more quietly and stably is realized. Meanwhile, the design that the main shaft is pressed into the shaft hole of the end cover two after being punched eight centimeters, enhances the connection stability between the main shaft and the end cover, makes the motor better bear various forces in the operation process, guarantees the stability of the internal structure of the motor, and further realizes the improvement of the overall stability of the motor, reduces the fault risk caused by problems such as structure loosening, and prolongs the service life of the motor.

[0019] 2. The utility model discloses a three customer assembly convex facets of bracket one bottom and unique concave assembly positioning slot are utilized for providing the clear positioning reference for motor assembly, realize the simplification of assembly process, and operating personnel can install operation more quickly and accurately. Moreover, the positioning convex slot of PCB board and the assembly positioning slot of bracket one are cooperated, and the positioning convex point of stator and the cooperation of the slot realize double foolproof effect, effectively reduce the probability of assembly error, improve the assembly precision, ensure the accurate assembly relationship between each part of motor, be favorable to the normal performance of motor.

[0020] 3. The utility model discloses the groove design of bracket one front and back harness position, avoids the glue immersion harness while guaranteeing the harness and bracket keeping force, realizes the enhancement of harness use reliability, reduces the motor failure caused by harness badness, realizes the effective fixation and protection of harness, avoids the shaking, displacement and pulling of harness in the vehicle operation, reduces the probability of occurrence of electrical problems such as lead joint loosening, short circuit, improves the reliability and stability of motor system whole, ensures that motor can continuously and stably operate under complex working conditions. ACCURACY

[0021] Figure 1 It is the whole structure schematic diagram of the utility model;

[0022] Figure 2 It is the main shaft schematic diagram of the utility model;

[0023] Figure 3 It is the end cover two schematic diagram of the utility model;

[0024] Figure 4 It is the bracket assembly positioning slot schematic diagram of the utility model;

[0025] Figure 5 It is the bracket one schematic diagram of the utility model;

[0026] Figure 6 It is the bracket one schematic diagram of the utility model;

[0027] Figure 7 It is the chip schematic diagram of the utility model;

[0028] Figure 8 It is the insulating paper schematic diagram of the utility model;

[0029] Figure 9 It is the insulating sleeve schematic diagram of the utility model;

[0030] Figure 10 It is the PCB board schematic diagram of the utility model;

[0031] Figure 11 The wiring connector of the utility model is a schematic diagram;

[0032] Figure 12 The utility model discloses a wiring connector Figure 10 The enlarged view of A in the middle;

[0033] Figure 13 The utility model discloses a wiring connector Figure 2 The enlarged view of B in the middle;

[0034] Figure 14 The utility model discloses a wiring connector Figure 2 The enlarged view of C in the middle;

[0035] Figure 15 The utility model discloses a wiring connector Figure 3 The enlarged view of D in the middle;

[0036] Figure 16 The utility model discloses a wiring connector Figure 3 The enlarged view of E in the middle.

[0037] The reference signs are as follows:

[0038] 1, end cover one;2, PCB board;3, support one;4, PVC hose;5, end cover two;6, chip;7, bearing;8, main shaft;9, magnet;10, winding;11, wave gasket;12, insulating paper;13, insulating sleeve;14, clamping spring;15, gear;16, positioning convex slot;17, support assembly positioning groove;18, glue hiding groove one;19, glue hiding groove two;20, wiring connector;21, pearling;22, support assembly positioning convex point;23, magnetic isolation tooth;24, clamping position. Specific implementation

[0039] In order to more clearly and completely illustrate the technical scheme of the utility model, the utility model will be further described below in combination with the drawings.

[0040] Please refer to Figures 1-16 The utility model discloses an easy-to-assemble static magnetic outer rotor direct current brushless motor.

[0041] In the embodiment, the end cover one 1 and the end cover two 5 are made of die-cast aluminum, the end cover two 5 plays a key role in the motor assembly, the main shaft 8 is specially treated and pressed into the shaft hole of the end cover two 5 after being punched eight times, which greatly enhances the stability of the connection between the main shaft 8 and the end cover, ensures that the main shaft 8 and the end cover will not loosen or displace during the operation of the motor, thereby ensuring the stability of the overall structure of the motor, at the same time, the inner wall of the end cover one 1 and the end cover two 5 in contact with the magnet 9 is respectively designed with a glue hiding groove one 18 and a glue hiding groove two 19, during the motor assembly process, when glue is used to fix related parts, the excess glue can flow into these glue hiding grooves, avoiding the accumulation of glue in other key parts and affecting the performance of the motor, for example, if the glue enters the bearing 7 or the bearing 21, it may cause poor operation or even damage, the design of the glue hiding groove effectively prevents this situation, in addition, the glue hiding position on the end cover two 5 not only hides glue, but also increases the holding force between the end cover and the shell, making the overall motor shell structure more compact, which is conducive to the stable operation of the motor in various working environments.

[0042] The PCB board 2 is an important carrier of the electrical control part of the motor, the contact surface of which is pasted with an insulating paper 12 made of DM, which has good insulation performance and can effectively prevent electrical short circuit between the PCB board 2 and the support one 3, ensuring the safe and stable operation of the motor electrical system, during the assembly process, the PCB board 2 is precisely fixed in the installation angle through the unique assembly fool-proof groove matched with the groove of the support one 3, which avoids the problems of poor electrical connection or abnormal motor control caused by incorrect installation angle of the PCB board 2, at the same time, the positioning convex groove 16 designed on the PCB board 2 forms a precise matching relationship with the support assembly positioning groove 17 of the support one 3, realizing the fool-proof assembly of the PCB board 2 on the support one 3, for example, during the large-scale production and assembly process, the operator can quickly and accurately install the PCB board 2 to the correct position without complex debugging and testing process, greatly improving the assembly efficiency and accuracy.

[0043] The bracket 3 is made of zinc alloy open mold, and the bottom has three customer assembly convex facets with a height of 0.2-0.5mm. The three facets provide clear positioning reference for assembly operation when the motor is assembled into automobile electric sliding door and other equipment, which facilitates the operator to quickly and accurately install the motor to the specified position, and improves the overall assembly efficiency. The concave bracket assembly positioning groove 17 designed on the bracket 3 is a key innovation, and the groove extends to the bottom plane of the bracket. The foolproof groove can be used for foolproof assembly of the stator and the PCB board 2 at the same time. During assembly, the stator and the PCB board 2 are respectively matched with the bracket assembly positioning groove 17 through their own positioning structures, to ensure that the installation positions of the two on the bracket 3 are accurate. For example, the bracket assembly positioning convex point 22 is matched with the bracket assembly positioning groove 17, and the positioning convex groove 16 of the PCB board 2 is matched with the bracket assembly positioning groove 17, to realize double foolproof effect and effectively reduce the probability of assembly error. In addition, the front and rear bearings 21 of the bracket 3 are provided with grooves, which solves the problem of glue in the process of fixing the bearings 21. When 648 anaerobic glue is used to stick the bracket 3 and the front and rear bearings 21, the control of the amount of glue is crucial. Too little glue will result in insufficient holding force of the bearings 21 and the bracket 3, affecting the stability of the motor. Too much glue may immerse into the inside of the bearings 21, causing the bearings 21 to be bad. The grooves can accommodate the excess glue that flows down or is squeezed out, ensuring sufficient holding force between the bearings 21 and the bracket 3, and preventing the glue from adversely affecting the normal use of the bearings 21.

[0044] Four bearings 21 are designed in the motor, two of which play a key role in supporting the operation of the motor rotor in the internal structure of the motor. They provide stable support points for the rotation of the rotor, ensuring that the rotor can rotate smoothly, thereby ensuring the stability and reliability of the motor output torque. When the motor assembly is completed, one bearing 21 is added at each end of the motor, and the bearing 21 added at the gear 15 end is of great significance. In the assembly of the motor and the whole vehicle, this bearing 21 can better support the cooperation of the motor and the gear 15 in the whole vehicle. For example, in the application scenario of automobile electric sliding door, the motor drives the opening and closing action of the sliding door through the gear 15. The bearing 21 at the gear 15 end can effectively reduce the risk of jamming of the motor during cooperation with the gear 15, making the opening and closing action of the sliding door more stable and smooth. The bearing 7 and the main shaft 8 are closely matched. During the operation of the motor, the bearing 7 can reduce the friction resistance of the main shaft 8 during rotation, reduce energy loss, and at the same time ensure the rotation accuracy of the rotor, improve the operation efficiency and service life of the motor.

[0045] The design of eight centi-si pressing into the shaft hole of the end cover two 5 on the main shaft 8 is an important link to ensure the stability of the overall structure of the motor. Through this way, the main shaft 8 and the end cover two 5 form a close connection, which can withstand various forces generated by the rotation of the rotor, such as centrifugal force, torsion, etc., during the operation of the motor, preventing the main shaft 8 from shaking or displacing in the shaft hole of the end cover two 5. This stable connection relationship is also of great significance to ensure the uniformity and stability of the magnetic field inside the motor, because the stability of the position of the main shaft 8 directly affects the relative position relationship between the magnet 9 and the winding 10, and further affects the electromagnetic conversion efficiency and performance of the motor.

[0046] The magnet 9 adopts square sintered boron magnet 9, which has obvious advantages in processing. Compared with other shapes, it is easier to process and manufacture, which can effectively reduce the processing cost. At the same time, the design of 12 slots and 14 poles is one of the key factors to reduce motor noise. During the operation of the motor, the cogging torque is one of the main reasons for noise. The structure design of 12 slots and 14 poles can effectively reduce the cogging torque, thereby reducing the noise level during the operation of the motor. During assembly, the magnet 9 is accurately assembled into the inner wall of the iron shell by the automatic machine, and the magnetic isolation tooth 23 on the end cover one 1 and the end cover two 5 plays an important role. Because the magnet 9 has strong magnetism, it is easy to attract each other during assembly, which causes assembly difficulty or inaccurate position. The magnetic isolation tooth 23 can effectively prevent the magnet 9 from being attracted together during assembly, ensuring the uniform distribution and accurate installation position of the magnet 9 in the inner wall of the iron shell, thereby ensuring the uniformity and stability of the magnetic field inside the motor, which is beneficial to improve the performance of the motor.

[0047] The winding 10 and the chip 6 are the core components of the motor to realize electromagnetic conversion. After the winding 10 is wound around the chip 6, glue is added to the inner hole of the chip 6. This operation not only fixes the position of the winding 10, but also enhances the connection strength between the chip 6 and the winding 10. During assembly, the chip 6 is assembled and positioned on the support assembly by aligning the support assembly positioning protrusions 22 of the support one 3 with the positioning grooves of the stator chip 6, ensuring the accurate installation position of the chip 6 in the stator. The UVW and wire tail common ends of the winding 10 are respectively welded on the corresponding pads of the PCB board 2, establishing an accurate electrical connection relationship. This accurate assembly and electrical connection method ensures that the current can accurately flow in the winding 10 during the operation of the motor, thereby generating a stable magnetic field that interacts with the magnet 9 to realize the rotation of the motor. At the same time, it is also convenient for electrical control and monitoring of the motor.

[0048] The wave-shaped gasket 11 is placed in the bearing 7 chamber on the side of the bracket controller, and its main function is to adjust the pre-tightening force of the bearing 7. During the motor assembly process, the pre-tightening degree of the bearing 7 can be accurately controlled by reasonably selecting the specifications and installation method of the wave-shaped gasket 11. The appropriate pre-tightening force can ensure that the bearing 7 maintains a good working state during the operation of the motor, reduces the backlash of the bearing 7, and improves the rotation accuracy and stability of the rotor. For example, during the start and stop of the motor, the rotor will experience acceleration and deceleration processes. At this time, the wave-shaped gasket 11 can prevent the bearing 7 from excessive displacement or shaking due to inertial force, ensure the smoothness of the motor operation, and prolong the service life of the bearing 7 and the entire motor.

[0049] The insulating paper 12 is attached to the contact surface between the PCB board 2 and the bracket 1, which effectively isolates the electrical connection between the PCB board 2 and the bracket 1, preventing short circuit failure due to the presence of conductive substances or electrical paths between the two. During the operation of the motor, high voltage and current in the electrical system may leak through various channels. If there is no isolation of the insulating paper 12, it may cause an electrical safety accident and affect the normal operation of the motor. The insulating sleeve 13 is installed on the contact surface between the controller and the over-bridge line, which also plays a crucial role in insulation. It can prevent the occurrence of leakage and short circuit between the controller and the varnish wire, ensuring the integrity and reliability of the motor electrical control system. At the same time, the design of the insulating sleeve 13 makes the assembly process simple and convenient, enabling quick and accurate installation, improving the assembly efficiency of the motor, and maintaining stable insulation performance during long-term use.

[0050] The clamp spring 14 is installed on the main shaft 8, and its main function is to prevent the rotor from loosening. During the operation of the motor, the high-speed rotation of the rotor will generate a large centrifugal force. If there is no fixation of the clamp spring 14, the rotor may be axially displaced along the main shaft 8, causing damage to the internal structure of the motor and seriously affecting the normal operation of the motor. The clamp spring 14 tightly clamps the specific position on the main shaft 8 through its own elasticity and gripping force, providing reliable axial positioning for the rotor, ensuring that the rotor maintains a stable positional relationship on the main shaft 8, and working cooperatively with other components to ensure stable operation of the motor.

[0051] Gear 15 is installed at the output shaft end of the motor main shaft 8 and is a key component for the motor to output power to external devices. In the application scenario of electric sliding doors in automobiles, the rotation of the motor is transmitted to gear 15 through the main shaft 8. Gear 15 meshes with other gears in the vehicle to convert the rotational torque of the motor into linear motion force, thereby driving the opening and closing action of the sliding door. The design and manufacturing precision of gear 15 directly affects the efficiency and accuracy of power transmission, as well as the smoothness and reliability of the sliding door opening and closing. For example, the tooth profile, module, pressure angle and other parameters of gear 15 need to be matched with the gear system of the whole vehicle to ensure efficient and smooth power transmission under different working conditions, while reducing wear and noise during gear meshing.

[0052] PVC flexible tubing 4 is used to protect the motor leads, wrapping around all nine leads of the motor. During motor operation, the leads may be affected by external environmental factors such as mechanical impact, chemical corrosion, and moisture. PVC flexible tubing 4 can effectively isolate these adverse factors, prevent damage to the lead sheath, and ensure the safety and stability of the electrical connection. The wire harness sheath has two locking positions 24. This design works in conjunction with the corresponding mechanism of the whole machine to effectively fix the wire harness. During vehicle operation, the vehicle will generate various vibrations and shaking. If the wire harness is not properly fixed, displacement or pulling may occur, leading to loose lead connectors, short circuits, and other faults. The locking positions 24 of the wire sheath are locked together with the overall structure, keeping the wire harness in a stable position during motor operation and vehicle movement, avoiding electrical problems caused by wire harness shaking, and improving the overall reliability of the motor system.

[0053] In summary, the detailed assembly process of an easy-to-assemble static magnet external rotor brushless DC motor is as follows:

[0054] 1. Rotor assembly

[0055] First, the motor rotor is assembled. Fourteen magnets 9 are precisely installed onto the inner wall of the iron shell using an automatic machine. During this process, the magnetic isolation teeth 23 on end cover 1 and end cover 2 5 play a role in preventing the magnets 9 from attracting each other and affecting the assembly position. Then, a bearing 7 is pressed into the main shaft 8 to form the preliminary structure of the rotor assembly. Next, the main shaft 8 is pierced eight millimeters and pressed into the shaft hole of end cover 2 5. End cover 1 is then firmly assembled onto end cover 2 5 by applying glue, completing the assembly of the rotor assembly. In this step, it is important to ensure that the main shaft 8 and end cover 2 5 are pressed into place tightly, and the amount and application position of the glue must be accurate to ensure the structural strength and stability of the rotor assembly.

[0056] 2. Stator assembly

[0057] Start assembling the stator assembly, carefully paste the insulating paper 12 on the contact surface of the PCB board 2 and the bracket 3, make sure that the insulating paper 12 completely covers the contact surface without bubbles, wrinkles and other defects to ensure good insulation effect, then accurately install the PCB board 2 on the bracket 3 with screws, the tightening torque of the screws should meet the specified requirements to prevent over-looseness or over-tightness, then install the insulating sleeve 13 on the contact surface of the controller and the bridge line, the insulating sleeve 13 should be installed in place and tightly fit with the related components, then after the chip 6 is wound around the winding 10, glue is added to the inner hole of the chip 6, the chip 6 is aligned with the bracket assembly positioning protrusions 22 of the bracket 3 and the positioning groove of the stator chip 6, and is accurately and correctly installed on the bracket assembly, finally the UVW and line tail common ends of the winding 10 are respectively welded on the corresponding pads of the PCB board 2, and the welding process should ensure that the welding points are firm, without virtual welding, short circuit and other problems, and the assembly of the stator assembly is completed.

[0058] 3. Stator and rotor assembly

[0059] The assembled stator assembly is assembled to the rotor assembly, a wave-shaped gasket 11 is placed in the bearing 7 chamber on the controller side of the bracket, the placement direction of the wave-shaped gasket 11 should be correct to ensure that it can normally play the role of adjusting the pre-tightening force of the bearing 7, then a bearing 7 is pressed in, so that the bearing 7 tightly fits with the main shaft 8, then a circlip 14 is installed on the main shaft 8, the circlip 14 should be clamped into the clamping groove of the main shaft 8 to ensure that it can effectively prevent the rotor from loosening, at this time the motor body assembly is completed, and during this process, attention should be paid to the installation sequence and position accuracy of each component to ensure that the air gap between the stator and the rotor is uniform and the magnetic field distribution is reasonable.

[0060] 4. Motor overall assembly is completed

[0061] The gear 15 is installed on the shaft end of the motor main shaft 8, the gear 15 should be keyed connected with the main shaft 8 or adopt other suitable connection methods to ensure firm connection and accurate torque transmission, then the two bearings 7 used by the customer are pressed into the front and rear ends of the main shaft 8, the pressing of the bearings 7 should be stable and in place, finally the motor lead wires are neatly arranged together with the PVC hose 4 to ensure that the lead wires are not twisted or squeezed in the hose, and then the clamping position 24 on the wire cover is accurately clamped with the corresponding mechanism of the whole machine to complete the fixation of the wire harness, and the other end of the motor lead wire is connected with the wire connector 20, thus the whole motor assembly is completed, and during the whole assembly process, the operation should be strictly in accordance with the design requirements and process specifications, and each step should be quality checked to ensure that the assembly quality of the motor meets the standard and can normally and stably operate to meet the needs of the application scenarios such as automobile electric sliding doors.

[0062] Of course, the utility model also can have other various implementation manners, based on this implementation manner, other implementation manners obtained by the ordinary skilled person in the art without making any creative labor all belong to the range of the utility model.

Claims

1. A magnetostatic outer rotor brushless DC motor easy to assemble, characterized in that: The motor comprises end cover one, end cover two and main shaft, the end cover two is provided with shaft hole, the main shaft is pressed into the shaft hole after being cut eight centimeters, the inner wall of the end cover one and the end cover two contacting with the magnet is respectively provided with glue hiding groove one and glue hiding groove two; The motor further comprises PCB board, the contact surface of the PCB board and the support one is pasted with insulating paper, the PCB board is matched with the groove of the support one through assembling foolproof slot, and the positioning convex slot on the PCB board is matched with the support assembling positioning slot of the support one; The support one is provided with concave support assembling positioning slot, the support assembling positioning slot extends to the bottom plane of the support, and the support one is provided with groove at front and back positions; The front and back positions are provided with four grooves in total, two of which are used for supporting the motor rotor, and the other two are respectively arranged at the front and back ends of the motor, one groove is arranged at the gear end, and the motor further comprises bearing which is closely matched with the main shaft.

2. A static magnetic externally-rotating-rotor brushless DC motor easy to assemble according to claim 1, characterized in that, The magnet is designed as 12-slot 14-pole, and the end cover one and the end cover two are provided with magnetic separation teeth.

3. A static magnetic externally-rotating brushless DC motor easy to assemble according to claim 1, characterized in that, The outer side of the main shaft is provided with chip, the outer side of the chip is provided with winding, the winding and the chip are core components for realizing electromagnetic conversion of the motor, the chip is provided with glue in the inner hole after winding, the chip is matched with the support assembling positioning convex point of the support one and the positioning slot of the stator chip, and the UVW and the tail end of the winding are respectively welded on the corresponding pads of the PCB board.

4. A static magnetic externally-rotating-rotor brushless DC motor easy to assemble according to claim 1, characterized in that, The outer side of the main shaft is provided with wave-shaped gasket.

5. A static magnetic externally-rotating brushless DC motor easy to assemble according to claim 1, characterized in that, One side of the PCB board is provided with insulating sleeve, and the insulating sleeve is connected with the contact surface of the controller and the bridge line.

6. A static magnetic externally-rotating-rotor brushless DC motor easy to assemble according to claim 1, characterized in that, The main shaft is provided with clamp spring, and the gear is arranged at the shaft end of the main shaft.

7. An easy assembly magnetorotational brakeless DC brushless motor outside rotor according to claim 1, characterized in that, The bottom of the support one is provided with convex small plane.

8. A static magnetic externally-rotating-rotor brushless DC motor easy to assemble according to claim 1, characterized in that, The motor is provided with nine lead wires, which are wrapped and protected by PVC hose, the wire harness is provided with two clamping positions, and the wire harness is fixed by cooperating with the corresponding mechanism of the whole machine, and one side of the PVC hose is provided with wire connector connected with the wire harness.

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