A brushless motor base and a brushless motor

Abstract

The application provides a brushless motor base and a brushless motor, which comprise a base disc, a damping cavity is arranged in the base disc, a connecting hole is formed in the upper end of the base disc, a ball head connecting ring is arranged in the connecting hole, a universal ball head is rotationally connected to the ball head connecting ring, a transmission shaft is connected to one end of the universal ball head, an elastic supporting pad is arranged on one side of the base disc and surrounds the transmission shaft, a connecting shaft is arranged in the damping cavity and is connected to the other end of the universal ball head and extends along the length direction of the transmission shaft, a piston disc is connected to the free end of the connecting shaft and is located in the middle of the damping cavity, a plurality of supporting elastic sheets are connected to the bottom of the damping cavity and are circumferentially distributed, and each supporting elastic sheet is connected to the bottom of the damping cavity from the bottom of the piston disc. The application also provides a brushless motor structure which can dissipate heat inside. The application adopts a brand-new motor base design to solve the problem of large motor vibration, and adopts a brand-new motor structure design to improve the heat dissipation performance.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of brushless motors, and relates to a brushless motor base and a brushless motor. BACKGROUND

[0002] In modern industry and consumer electronics, brushless motors have been widely used due to their high efficiency, long service life, and low maintenance cost. Brushless motors replace traditional mechanical commutators with electronic commutation, which not only significantly reduces electrical spark interference, but also improves the reliability and efficiency of the motor. Therefore, brushless motors are widely used in aerospace, automobile manufacturing, household appliances, precision instruments and other fields.

[0003] However, as the application range expands and technical requirements improve, some challenges faced by brushless motors have gradually emerged. One key issue is the vibration phenomenon generated during motor operation. When the brushless motor is running, the eccentric radial force caused by the rotation of the rotor will cause the motor to vibrate. Especially in high-speed operation, the vibration effect caused by unbalanced force is more obvious. This vibration not only affects the stability and service life of the motor itself, but also may be transmitted to the machine body connected thereto, causing large vibration of the machine body, thereby affecting the working performance and operation experience of the entire device.

[0004] Most of the motor bases on the market are designed mainly to provide stable support and effective fixing function, with less consideration for vibration reduction. Most existing motor bases do not have specially designed vibration reduction structures or materials, and cannot effectively absorb or isolate the vibration generated during motor operation. This causes the motor installed on these bases to easily transmit vibration to the entire machine body during operation, causing large vibration problems of the machine body.

[0005] In addition, the heat dissipation problem of brushless motors is one of the key factors limiting their performance improvement. Currently, brushless motors mainly rely on the shell for heat dissipation, but the heat dissipation capacity of the shell is limited, especially under high load or continuous working conditions, heat is difficult to dissipate effectively, which leads to an increase in motor temperature, further limiting the performance of the motor. Excessive temperature not only affects the working efficiency and service life of the internal components of the motor, but also increases the risk of motor failure, which is a major challenge for applications requiring high performance and stability. SUMMARY

[0006] The purpose of the present application is to provide a brushless motor base and a brushless motor, which adopts a new motor base design to solve the problem of large motor vibration, and adopts a new motor structure design to improve its heat dissipation performance.

[0007] In order to solve the above technical problems, the application provides a brushless motor base, which comprises a base disc, a damping cavity is arranged in the base disc, a connecting hole is formed in the upper end of the base disc, a ball head connecting ring is arranged in the connecting hole, a universal ball head is rotationally connected to the ball head connecting ring, a transmission shaft is connected to one end of the universal ball head, the free end of the transmission shaft is used for being connected to the bottom of a motor shell, an elastic supporting pad is arranged on the transmission shaft on one side of the universal ball head, a connecting shaft is arranged in the damping cavity on the other end of the universal ball head, the free end of the connecting shaft is connected to a piston disc arranged in the middle of the damping cavity, a plurality of supporting elastic sheets are circumferentially arranged and connected between the bottom of the piston disc and the bottom of the damping cavity.

[0008] When the motor works and generates vibration, the motor slightly shakes and presses the elastic supporting pad on one side, the slight shaking of the motor drives the universal ball head to rotate relative to the ball head connecting ring through the transmission shaft, and then drives the piston disc to move through the connecting shaft, the piston disc pushes and pulls the supporting elastic sheets to make them elastically deform, when the piston disc moves, the damping oil on both sides of the piston disc is transferred through the through hole, the damping oil generates strong damping energy consumption through the through hole, so that the energy generated by vibration is consumed, and the vibration is reduced, and the vibration energy transmitted from the motor to the machine body is effectively reduced.

[0009] The application is further provided that the piston disc is provided with a plurality of through holes, and the damping cavity is provided with damping oil.

[0010] The application is further provided that the inner wall of the damping cavity is an outwardly concave arc shape matched with the piston disc.

[0011] The application is further provided that the edge of the base disc away from the transmission shaft is provided with a mounting ring, and the mounting ring is provided with a plurality of mounting holes.

[0012] The application is further provided that the elastic supporting pad is made of rubber material.

[0013] The application further discloses a brushless motor base, which comprises a hollow motor shell with openings at both ends, a plurality of mounting grooves are arranged on the inner side of the motor shell in the length direction and are distributed in a circle, each mounting groove is detachably connected with a hollow heat dissipation strip, each hollow heat dissipation strip is outwardly open, the motor shell is provided with a stator core with an opening in the middle at each mounting groove, the stator core is formed by laminating a plurality of silicon steel sheets, each silicon steel sheet comprises a connecting ring on the inner side, a plurality of winding sheets corresponding to the hollow heat dissipation strips outward of the connecting ring, the outer edge of each winding sheet is inwardly provided with a bayonet nut matched with the hollow heat dissipation strip, and the winding sheet outwardly sleeving the hollow heat dissipation strip of the stator core is wound with a coil winding.

[0014] The middle part of the stator core is rotationally connected with a rotor rotating shaft, the rotor rotating shaft is provided with a plurality of permanent magnet poles which are distributed in a circle and arranged in the length direction in the opening of the stator core, and adjacent two permanent magnet poles are arranged in an alternate two-pole mode, one end of the motor shell is detachably connected with an upper end cover, the middle part of the upper end cover is provided with an upper connecting hole, the upper end of the rotor rotating shaft penetrates out of the upper connecting hole, the upper connecting hole is provided with an upper bearing sleeving the rotor rotating shaft, and the upper end cover is provided with a Hall induction sensor sleeving the rotor rotating shaft and used for detecting the magnetic field change of the permanent magnet poles.

[0015] The other end of the motor shell is detachably connected with a hollow lower end base, the end, away from the motor shell, of the lower end base is connected with the free end of the transmission shaft, the middle part of the end, close to the motor shell, of the lower end base is provided with a lower connecting hole, the lower end of the rotor rotating shaft penetrates out of the lower connecting hole, the lower connecting hole is provided with a lower bearing sleeving the rotor rotating shaft, the rotor rotating shaft extending into the lower end base is connected with a heat dissipation fan, and the lower end of each hollow heat dissipation strip is open.

[0016] By adopting the technical scheme, when the motor passes current to drive the permanent magnet magnetic pole to drive the rotor shaft to rotate, the rotor shaft drives the heat dissipation fan to rotate to generate airflow, so that external air enters the lower end seat from the air inlet hole, enters the hollow heat dissipation strip along the lower air inlet channel through the air inlet hole, and gradually flows outward along the flow guide channel in the hollow heat dissipation strip, and finally is discharged from the air outlet hole. In the process, the gas flow absorbs the heat of the hollow heat dissipation strip, the hollow heat dissipation strip absorbs the heat of the winding sheet, the winding sheet absorbs the heat generated by the coil winding when the coil winding is powered on, and finally the purpose of dissipating heat from the outside to the inside of the coil winding is achieved. If the rotor shaft is reversed, the air inlet is from the air outlet hole, and the air outlet is from the air inlet hole. In summary, the rotation of the rotor shaft caused by the motor operation can start the airflow heat dissipation. The higher the speed, the faster the airflow flow rate, and the coil winding can always be fully cooled.

[0017] Further preferably, a plurality of outwardly inclined flow guide strips are arranged in each hollow heat dissipation strip, a flow guide channel is formed between each two flow guide strips and between the uppermost flow guide strip and the upper end of the hollow heat dissipation strip, a gas flow gap is left between the lower end of each flow guide strip and the inner wall of the corresponding hollow heat dissipation strip away from the motor housing, and a plurality of air outlet holes are formed in the motor housing at each mounting groove and are in one-to-one correspondence with the corresponding flow guide channels.

[0018] Further preferably, a lower air inlet channel in communication with the corresponding air inlet hole is arranged downward at the lower end of each hollow heat dissipation strip outside the corresponding winding sheet, and a sealing gasket matched with the edge of the corresponding lower air inlet channel is arranged at the upper end of the lower end seat outside each air inlet hole.

[0019] Further preferably, the air inlet hole is located below the heat dissipation fan.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] Firstly, the present application adopts a brand-new motor base design for isolating the vibration generated during the operation of the motor. The supporting spring piece plays a role in stable support. When there is no vibration, the supporting spring piece can ensure that the motor is stable and does not shake. When the motor operates and generates vibration, the motor vibration drives the piston disc to act on the supporting spring piece through transmission. When the piston disc moves, it generates strong damping energy consumption through damping oil to consume the energy generated by the vibration, thereby achieving the effect of vibration reduction and effectively reducing the vibration energy transmitted from the motor to the machine body.

[0022] Secondly, the brushless motor of the present application can drive the heat dissipation fan to rotate when working, so that air flow is generated to pass through the hollow heat dissipation strip, absorb the heat of the hollow heat dissipation strip, and finally indirectly absorb the heat generated by the coil winding. The heat generated in the motor is quickly discharged outward through the air flow. Compared with the existing motor external heat dissipation method, the brushless motor can more efficiently dissipate heat during motor operation, improve the working efficiency and service life of internal components, and fully exert the performance of the brushless motor.

[0023] Thirdly, the motor base of the present application adopts a multi-stage structure design of elastic support, support pad damping and damping oil energy dissipation, but only performs slight displacement, so that the motor base can be as thin and small as possible, and is installed on the machine body with smaller volume, and the whole is more simple. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is the overall structure schematic diagram of the present application;

[0025] Figure 2 is the exploded view of the present application;

[0026] Figure 3 is the sectional view for showing the internal structure of the motor base;

[0027] Figure 4 is the partial sectional view for showing the internal structure of the motor base;

[0028] Figure 5 is used to show the connection of the stator core, the hollow heat dissipation strip and the coil winding;

[0029] Figure 6 is the internal structure of the hollow heat dissipation strip;

[0030] Figure 7 is the partial sectional view for showing the internal structure of the lower end seat;

[0031] Figure 8 is the partial sectional view for showing the internal structure of the motor shell.

[0032] Wherein, 1, motor shell; 2, mounting groove; 3, hollow heat dissipation strip; 4, flow guide strip; 5, flow guide channel; 6, air gap; 7, air outlet; 8, silicon steel sheet; 9, connecting ring; 10, winding sheet; 11, bayonet; 12, coil winding; 13, rotor shaft; 14, permanent magnet pole; 15, upper end cover; 16, upper connecting hole; 17, upper bearing; 18, Hall induction sensor; 19, lower end seat; 20, lower connecting hole; 21, lower bearing; 22, heat dissipation fan; 23, air inlet; 24, lower air inlet channel; 25, sealing washer; 26, air inlet hole; 27, base disc; 28, mounting ring; 29, mounting hole; 30, damping cavity; 31, ball head connecting ring; 32, universal ball head; 33, transmission shaft; 34, elastic support pad; 35, connecting shaft; 36, piston disc; 37, through hole; 38, support elastic sheet. DETAILED DESCRIPTION

[0033] The brushless motor base and the brushless motor according to the present application will be further described below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present application will be more apparent according to the following description. It should be noted that the accompanying drawings are all in a very simplified form and all use non-precise proportions, only for the purpose of facilitating and clarifying the purpose of assisting the description of the embodiments of the present application. The same or similar reference signs in the drawings represent the same or similar parts.

[0034] Embodiment, refer to Figures 1-8 A brushless motor base, comprising a hollow motor shell 1 with both ends open, the inner side of the motor shell 1 is provided with twelve mounting grooves 2 arranged along the length direction and distributed in a circle, each mounting groove 2 is formed by two vertical strips, and each mounting groove 2 is detachably connected with a hollow heat dissipation strip 3, the hollow heat dissipation strip 3 is made of metal aluminum, so that it has good heat conductivity to absorb the heat of the coil winding 12, each hollow heat dissipation strip 3 is outwardly open, and a plurality of outwardly and downwardly inclined flow guide strips 4 are arranged in each hollow heat dissipation strip 3, a downwardly inclined flow guide channel 5 is formed between every two flow guide strips 4 and between the uppermost flow guide strip 4 and the upper end of the hollow heat dissipation strip 3, and an air gap 6 is left between the lower end of each flow guide strip 4 and the inner wall of the corresponding hollow heat dissipation strip 3 away from the motor shell 1, a plurality of air outlets 7 are provided in the motor shell 1 at each mounting groove 2, which are in one-to-one correspondence with the corresponding flow guide channels 5, so that the air first enters the air gap 6, gradually climbs upward under the blockage of the flow guide strip 4 to fully absorb heat, then gradually disperses upward to be guided out of the flow guide channel 5, and finally is discharged from the air outlet 7.

[0035] The motor housing 1 is provided with a stator core with a middle opening, the stator core is stacked by a plurality of silicon steel sheets 8, each silicon steel sheet 8 comprises a connecting ring 9 located at the inner side, twelve winding sheets 10 corresponding to the hollow heat dissipation strips 3 are arranged outwardly at the edge of the connecting ring 9, and a clamping hole 11 is formed outwardly at the outer edge of each winding sheet 10 to match the hollow heat dissipation strip 3, so that the stator core can be clamped into the hollow heat dissipation strip 3, and a coil winding 12 is wound on the winding sheet 10 outside the hollow heat dissipation strip 3, the coil winding 12 generates heat during operation and transmits the heat to the winding sheet 10, and the winding sheet 10 transmits the heat to the hollow heat dissipation strip 3, so that the hollow heat dissipation strip 3 can gradually dissipate heat.

[0036] The stator core is rotatably connected with a rotor shaft 13, the rotor shaft 13 is provided with six permanent magnet poles 14 which are circumferentially distributed and arranged along the length direction of the rotor shaft 13 in the opening of the stator core, and the adjacent two permanent magnet poles 14 are arranged alternately. One end of the motor housing 1 is detachably connected with an upper end cover 15, the middle part of the upper end cover 15 is provided with an upper connecting hole 16, the upper end of the rotor shaft 13 passes through the upper connecting hole 16, an upper bearing 17 is arranged in the upper connecting hole 16 to sleeve the rotor shaft 13, and a Hall induction sensor 18 is arranged in the upper end cover 15 to sleeve the rotor shaft 13 and detect the magnetic field change of the permanent magnet poles 14, the Hall induction sensor 18 determines the position of the rotor according to the magnetic field change generated by the rotor permanent magnet, and based on the rotor position information provided by the Hall induction sensor 18, the electronic controller of the brushless motor can switch the current direction in the coil winding 12 at the appropriate time, i.e. electronic commutation.

[0037] The other end of the motor housing 1 is detachably connected with a hollow lower end seat 19, the middle part of the lower end seat 19 close to the one end of the motor housing 1 is provided with a lower connecting hole 20, the lower end of the rotor shaft 13 passes through the lower connecting hole 20, a lower bearing 21 is arranged in the lower connecting hole 20 to sleeve the rotor shaft 13, the rotor shaft 13 extends into the lower end seat 19 and is connected with a heat dissipation fan 22, the lower end of each hollow heat dissipation strip 3 is open, the upper end of the lower end seat 19 is provided with twelve air inlet holes 23 which are in communication with the hollow heat dissipation strips 3 one by one, the lower end of each hollow heat dissipation strip 3 is provided with a lower air inlet channel 24 which is in communication with the corresponding air inlet hole 23, the upper end of the lower end seat 19 is provided with a sealing gasket 25 which matches the edge of the corresponding lower air inlet channel 24 outside each air inlet hole 23, so as to prevent dust from entering the motor, and a plurality of air inlet holes 26 are formed in the side wall of the lower end seat 19 and are located below the heat dissipation fan 22.

[0038] The lower end of the lower end seat 19 is connected with a motor base, which comprises a base disc 27 connected below the lower end seat 19, the edge of one end of the base disc 27 is provided with a ring of mounting rings 28, the mounting rings 28 are provided with a plurality of mounting holes 29 for mounting the base disc 27 on the machine body, a damping cavity 30 is arranged in the base disc 27, and damping oil is arranged in the damping cavity 30, wherein the damping oil is silicone oil. A connecting hole is formed in the upper end of the base disc 27, a flat ball head connecting ring 31 is arranged in the connecting hole, the ball head connecting ring 31 is rotatably connected with a universal ball head 32, the universal ball head 32 is also a flat structure matched with the ball head connecting ring 31, one end of the universal ball head 32 is outwardly connected with a transmission shaft 33, the free end of the transmission shaft 33 is connected with the bottom of the lower end seat 19, so that when the motor vibrates, the universal ball head 32 can be driven to rotate relative to the ball head connecting ring 31 through the transmission shaft 33, and a plurality of elastic support pads 34 are arranged on one side of the base disc 27 and outwardly surround the transmission shaft 33, the elastic support pads 34 are made of rubber and are used for supporting between the lower end seat 19 and the base disc 27. The other end of the universal ball head 32 is arranged with a connecting shaft 35 in the damping cavity 30, the connecting shaft 35 is arranged along the length direction of the transmission shaft 33, the free end of the connecting shaft 35 is connected with a piston disc 36 located in the middle of the damping cavity 30, the piston disc 36 is provided with a plurality of through holes 37, and the inner wall of the damping cavity 30 is an outwardly concave arc structure matched with the piston disc 36. When the universal ball head 32 rotates, the piston disc 36 is driven to move through the connecting shaft 35, so that the damping oil is consumed through the small through holes 37, so as to realize the damping energy consumption and vibration reduction effect. The piston disc 36 is connected with a plurality of support springs 38 arranged in a circle and arranged in the bottom of the damping cavity 30, each support spring 38 is connected from the bottom of the piston disc 36 to the bottom of the damping cavity 30, and is supported between the piston disc 36 and the bottom of the base disc 27 through the support spring 38, so as to limit the rotation of the universal ball head 32, so that the motor will not shake after being installed.

[0039] Working principle: when the motor is electrified, the permanent magnet magnetic pole 14 drives the rotor shaft 13 to rotate, the rotor shaft 13 drives the cooling fan 22 to rotate, air flow is generated, external air enters the lower end seat 19 from the air inlet hole 23, enters the hollow cooling strip 3 through the air inlet hole 23 along the lower air inlet channel 24, climbs upward along the air flow gap 6 in the hollow cooling strip 3, and gradually flows outward along the guide channel 5, and finally is discharged from the air outlet hole 7. In the process, the gas flow absorbs the heat of the hollow cooling strip 3, the hollow cooling strip 3 absorbs the heat of the winding sheet 10, the winding sheet 10 absorbs the heat generated by the coil winding 12 when electrified, and finally realizes the purpose of cooling and heat dissipation from the outside to the inside of the coil winding 12. If the rotor shaft 13 reverses, the air enters from the air outlet hole 7 and is discharged from the air inlet hole 26. In summary, the rotation of the rotor shaft 13 caused by the operation of the motor can start the air flow cooling, the higher the speed, the faster the air flow, and the coil winding 12 can be fully cooled.

[0040] When the motor works to generate vibration, the motor slightly shakes to press the elastic supporting pad 34, the slight shaking of the motor drives the universal ball head 32 to rotate relative to the ball head connecting ring 31 through the transmission shaft 33, and then the connecting shaft 35 pulls the piston disc 36 to move, the piston disc 36 at this time pushes and pulls the supporting elastic sheet 38 to make it elastically deform, when the piston disc 36 moves, the damping oil on both sides of the piston disc 36 is transferred through the through hole 37, the damping oil generates strong damping energy consumption through the through hole 37, so as to consume the energy generated by the vibration, and achieve the effect of reducing the vibration, effectively reducing the vibration energy transmitted by the motor to the machine body.

[0041] It should be further supplemented that all the "provides" and similar descriptions in the present application (especially the specification) express that there is a connection relationship between two structures, but the specific connection means is not limited too much, and it is usually a conventional connection means, that is, it should be understood that the means is prior art, and does not need to be described too much. For example, "m is provided with n", only expresses that m structure has n structure, and the specific connection between the two is through welding, riveting, adhesive connection or integral molding, which is within the protection scope of the present application. For example, "x is provided with y", only expresses that y and x can rotate relative to each other, and as for whether the two are connected through a bearing to rotate, or y directly penetrates x to rotate with x, or other realizable modes, which are within the protection scope of the present application.

[0042] The above description is only a description of the preferred embodiments of the present application, and is not any limitation on the scope of the present application, any modification or modification of the present application by the person skilled in the art according to the above disclosure is within the protection scope of the claims.

Claims

1. A brushless motor comprising a motor housing (1) which is hollow and open at both ends, characterized in that, The inner side of the motor shell (1) is provided with a plurality of mounting grooves (2) arranged along the length direction and distributed in a circle, each mounting groove (2) is detachably connected with a hollow heat dissipation strip (3), each hollow heat dissipation strip (3) is outwardly open, the motor shell (1) is provided with a stator core with a middle opening, the stator core is composed of a plurality of silicon steel sheets (8) laminated, each silicon steel sheet (8) includes a connecting ring (9) on the inner side, a plurality of winding sheets (10) corresponding to the hollow heat dissipation strips (3) outward of the connecting ring (9), the outer edge of each winding sheet (10) is inwardly provided with a bayonet (11) matched with the hollow heat dissipation strip (3), the stator core is wound with a coil winding (12) on the winding sheet (10) sleeved on each hollow heat dissipation strip (3); The middle part of the stator core is rotatably connected with a rotor shaft (13), the rotor shaft (13) is provided with a plurality of permanent magnet poles (14) arranged along the length direction and distributed in a circle in the opening of the stator core, adjacent two permanent magnet poles (14) are arranged alternately in two poles, one end of the motor shell (1) is detachably connected with an upper end cover (15), the middle part of the upper end cover (15) is provided with an upper connecting hole (16), the upper end of the rotor shaft (13) passes out from the upper connecting hole (16), the upper connecting hole (16) is provided with an upper bearing (17) sleeving the rotor shaft (13), the upper end cover (15) is provided with a Hall induction sensor (18) sleeving the rotor shaft (13) and used for detecting the magnetic field change of the permanent magnet pole (14); The other end of the motor shell (1) is detachably connected with a hollow lower end seat (19), the end of the lower end seat (19) away from the motor shell (1) is connected with the free end of a transmission shaft (33), the middle part of the end of the lower end seat (19) close to the motor shell (1) is provided with a lower connecting hole (20), the lower end of the rotor shaft (13) passes out from the lower connecting hole (20), the lower connecting hole (20) is provided with a lower bearing (21) sleeving the rotor shaft (13), the rotor shaft (13) extending into the lower end seat (19) is connected with a heat dissipation fan (22), the lower end of each hollow heat dissipation strip (3) is open, the upper end of the lower end seat (19) is provided with a plurality of air inlet holes (23) corresponding to the hollow heat dissipation strips (3), the side wall of the lower end seat (19) is provided with a plurality of air inlet holes (26). The lower end of the lower end seat (19) is connected with a motor base, the motor base comprises a base disc (27) connected below the lower end seat (19), a damping cavity (30) is arranged in the base disc (27), a connecting hole is formed in the upper end of the base disc (27), a ball head connecting ring (31) is arranged in the connecting hole, a universal ball head (32) is rotatably connected with the ball head connecting ring (31), a transmission shaft (33) is connected with one end of the universal ball head (32) outward, the free end of the transmission shaft (33) is used for connecting with the bottom of the motor shell, an elastic supporting pad (34) is arranged on the side of the universal ball head (32) and surrounds the transmission shaft (33), a connecting shaft (35) is arranged in the damping cavity (30) along the length direction of the transmission shaft (33) at the other end of the universal ball head (32), a piston disc (36) is connected with the free end of the connecting shaft (35) and is located in the middle of the damping cavity (30), a plurality of support elastic sheets (38) are connected with the bottom of the damping cavity (30) and are circumferentially distributed on the piston disc (36), each support elastic sheet (38) is connected with the bottom of the damping cavity (30) outward from the bottom of the piston disc (36).

2. A brushless motor according to claim 1, characterized in that A plurality of outwardly inclined flow guide strips (4) are arranged in each hollow heat dissipation strip (3), a flow guide channel (5) is formed between every two flow guide strips (4) and between the uppermost flow guide strip (4) and the upper end of the hollow heat dissipation strip (3), an air flow gap (6) is left between the lower end of each flow guide strip (4) and the inner wall of the corresponding hollow heat dissipation strip (3) away from the motor shell (1), a plurality of air outlet holes (7) are formed in the motor shell (1) at each mounting groove (2) and are in one-to-one correspondence with the corresponding flow guide channels (5).

3. A brushless motor according to claim 1, wherein A lower air inlet channel (24) in communication with the corresponding air inlet hole (23) is arranged downward at the lower end of each hollow heat dissipation strip (3) outside the corresponding winding sheet (10), a sealing gasket (25) matched with the edge of the corresponding lower air inlet channel (24) is arranged at the upper end of the lower end seat (19) outside each air inlet hole (23).

4. A brushless motor according to claim 1, wherein The air inlet hole (26) is located below the heat dissipation fan (22).

5. A brushless motor according to claim 1, wherein The piston disc (36) is provided with a plurality of through holes (37), and the damping cavity (30) is provided with damping oil.

6. A brushless motor according to claim 5, wherein, The inner wall of the damping cavity (30) is an outwardly concave arc shape matched with the piston disc (36).

7. A brushless motor according to claim 1, wherein An installation ring (28) is arranged at the edge of the one end of the base disc (27) away from the transmission shaft (33), and the installation ring (28) is provided with a plurality of installation holes (29).

8. A brushless motor according to claim 1, wherein The elastic supporting pad (34) is made of rubber material.

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