Brushless motor and its isolation ventilation structure

Abstract

A brushless motor and its isolation ventilation structure, wherein the brushless motor comprises: a motor body and an isolation ventilation structure; the motor body comprises a stator and a rotor; the stator comprises a stator body and at least one coil, and the coil is arranged on the stator body; the stator body comprises at least one rotor channel, and the rotor is magnetically rotatably arranged in the stator channel, and when the coil is working, the rotor rotates under the action of electromagnetic force; the ventilation structure is nested in the stator body to isolate the coil, and the airflow passes through the stator through the ventilation structure, so that the airflow will not directly contact the coil of the stator, so that the brushless motor is suitable for an electric tool.

Description

Technical Field

[0001] The present invention relates to the field of brushless motors, and further to a brushless motor and an isolation and ventilation structure thereof, wherein the brushless motor is suitable for electric tools. Background Art

[0002] Power tools, such as electric drills, electric grinders, electric hammers, electric angle grinders, electric hammers, impact drills, concrete vibrators, electric planers, etc., are all tools commonly used in modern industry. Generally speaking, the operating environment of most power tools is relatively harsh. For example, a large amount of dust, iron filings and other debris will be generated during the operation.

[0003] The motor is an important part of the power tool, but limited to the use environment of the power tool, the power tool generally uses a series motor. Based on its own principle and structure, the series motor has low power and large size. The power tool is generally a handheld device, so it is very inconvenient to use.

[0004] Based on its own working principle, brushless DC motors have many advantages over series-excited motors, such as high speed, high power, small size, light weight, and long life, which are exactly what power tools need. Traditional brushless motors include a rotor and a stator. The rotor includes a magnetic steel and an iron core on the shaft, and the stator includes a wound coil. When the coil is energized, a magnetic field is generated, and the magnetic steel on the rotor is induced. The electromagnetic force generated during the electromagnetic induction process drives the rotor to rotate.

[0005] In this structure, since the stator is composed of multiple turns of coils that overlap and wind, heat is easily accumulated. In order to ensure good heat dissipation performance, a ventilation channel is usually provided in the stator, and the coil is placed in such a ventilation channel. In other words, the coil is in direct contact with the air flowing in from the outside, and the heat on the coil surface is taken away by the air flow passing through the coil.

[0006] The structure of the brushless motor helps to reduce the heat of the motor to a certain extent, but at the same time, due to such a relatively open structure, it is necessary to ensure that the air flowing through is clean and cannot carry too much dust or impurities. Because the impurities carried in the air can easily accumulate on the surface of the stator coil, the space for the coil becomes smaller and smaller, and the temperature of the motor rises sharply and burns out; on the other hand, if impurities such as iron filings accumulate on the coil, it is easy to cause the coil to short-circuit and burn out. This requirement limits the use environment of traditional brushless motors, that is, they can only be used in a relatively clean environment. The working environment of power tools, with a large amount of dust, iron filings, etc., is obviously not suitable for the operation of brushless motors, which makes the various advantages of brushless motors also

[0007] Cannot be used for power tools.

[0008] In summary, there is a great need for a brushless motor that has fewer environmental restrictions and can be used in harsh environments such as dust and iron filings, so that the brushless motor can be used in a wider range of applications, such as in various power tools. Summary of the invention

[0009] One object of the present invention is to provide a brushless motor and an isolation ventilation structure thereof, wherein the brushless motor includes an isolation ventilation structure that can thermally isolate the airflow passing through the brushless motor, so that the airflow can flow through the brushless motor through the isolation ventilation structure without directly contacting other components of the brushless motor, thereby avoiding the influence of impurities in the airflow on the brushless motor.

[0010] One object of the present invention is to provide a brushless motor and its isolation ventilation structure, wherein the brushless motor includes at least one stator body and at least one coil, the isolation ventilation structure includes two motor end covers and at least one ventilation pipe, the motor end covers are shielded at both ends of the stator body, the ventilation pipe is arranged together with the coil, and is connected to the two motor end covers, so that the airflow entering from the outside flows through the coil under the isolation of the ventilation pipe.

[0011] One object of the present invention is to provide a brushless motor and its isolation and ventilation structure, wherein the stator body includes a plurality of winding units, the isolation and ventilation structure includes two nesting frames, the nesting frames can be nested in the stator body in abutting relationship, and the motor end covers are respectively covered on the corresponding nesting frames to isolate the stator and stably fix the motor end covers.

[0012] One object of the present invention is to provide a brushless motor and its isolation and ventilation structure, wherein the nested frame includes at least one nested monomer, the nested monomer matches the structure of the winding monomer, the winding monomer is insulated and isolated by the nested monomer, and the coil is insulated and isolated by the nested monomer and is wound around the winding monomer without the need for a separate insulating component.

[0013] An object of the present invention is to provide a brushless motor and its isolated ventilation structure, wherein the nested frame includes at least one connecting wall connected between adjacent nested monomers to form an insulating channel, and the coil is accommodated in the insulating channel.

[0014] One object of the present invention is to provide a brushless motor and its isolation and ventilation structure, wherein adjacent nested monomers include an extended edge and an isolation plate, the extended edges of adjacent nested monomers form an extended groove, and the isolation plate is suitable for being inserted into the extended groove, thereby isolating the coil and the rotor of the brushless motor.

[0015] An object of the present invention is to provide a brushless motor and an isolated ventilation structure thereof, wherein the two motor end covers have at least one ventilation hole connected to the ventilation pipe, so that external airflow passes through the brushless motor through the ventilation pipe.

[0016] One object of the present invention is to provide a brushless motor and an isolation ventilation structure thereof, wherein the isolation ventilation structure is applied to the brushless motor, so as to isolate impurities in the environment, enhance the ventilation and heat dissipation performance of the brushless motor, and enable the brushless motor to be applied to harsh environments, such as the working environment of power tools.

[0017] In order to achieve at least one of the above purposes of the present invention, one aspect of the present invention provides a brushless motor, which includes a brushless motor, which includes: a motor body and a ventilation structure; the motor body includes a stator and a rotor; the stator includes a stator body and at least one coil, and the coil is arranged on the stator body; the stator body includes at least one rotor channel, and the rotor is magnetically rotatably arranged in the stator channel, when the coil is working, the rotor rotates under the action of electromagnetic force; the ventilation structure is nested in the stator to isolate the coil, and the airflow passes through the stator through the ventilation structure, so that the airflow will not directly contact the coil of the stator, so that the brushless motor is suitable for an electric tool.

[0018] In one embodiment, the isolation ventilation structure in the brushless motor includes two nesting frames, two motor end covers and a plurality of ventilation pipes. The nesting frames can be nested in the stator body in a docking manner, and the motor end covers are respectively covered by the nesting frames. The ventilation pipes pass through the stator body, and the gas connects the two motor end covers, so that the external airflow can circulate in isolation from the inside of the stator body.

[0019] In one embodiment, the stator body of the brushless motor includes a plurality of winding monomers, the two nesting frames include a plurality of nesting monomers, the shapes of the nesting monomers match each other, and the nesting monomers are nested in the winding monomers.

[0020] In one embodiment, in the brushless motor, the two nesting frames can be nested in the stator body in abutting relationship.

[0021] In one embodiment, each nesting frame in the brushless motor has a plurality of nesting channels suitable for inserting the winding unit, so that the nesting is inserted into the stator body.

[0022] In one embodiment, each nested unit in the brushless motor includes two extension walls and a bridging top, and the two extension walls are arranged on both sides of the bridging top facing the ground to form the nested channel, so as to facilitate the insertion of the winding unit and limit the winding unit to the bridging top.

[0023] In one embodiment, the nesting frame in the brushless motor includes a plurality of connecting walls, wherein the connecting walls connect the extending walls of adjacent nesting units to form an insulating channel, and the coil is accommodated in the insulating channel.

[0024] In one embodiment, the stator body of the brushless motor has a plurality of winding grooves formed by spacing the winding monomers, and the insulating channel wall is accommodated in the winding grooves.

[0025] In one embodiment, the stator body of the brushless motor has a plurality of winding slots formed by intervals of the winding monomers, and the coils are insulated and isolated by the nested frames and wound around the winding monomers.

[0026] In one embodiment, the stator body of the brushless motor has a plurality of winding openings, the winding openings are connected to the rotor channel, and each nesting frame has a plurality of inlets, the inlets match the winding openings.

[0027] In one embodiment, the ventilation and dust isolation structure in the brushless motor includes a plurality of isolation plates, and the isolation plates block the inlet to isolate the insulation channel and the rotor channel.

[0028] In one embodiment, the nested monomers in the brushless motor include two outer ribs, each of which extends in a bent manner along one side of the extension wall to partially block the insulating channel, and the two outer ribs of adjacent nested monomers form the entrance.

[0029] In one embodiment, the isolation sheet in the brushless motor is plugged into the inlet.

[0030] In one embodiment, the nesting frame in the brushless motor includes a connecting ring, and each of the nesting units is connected to one side of the connecting ring according to a predetermined layout to facilitate fixing of each of the nesting units.

[0031] In one embodiment, the connecting ring in the brushless motor has a limiting groove surrounding the inner side of the connecting ring, and the motor end cover is limited in the limiting groove.

[0032] In one embodiment, the connecting ring in the brushless motor has a plurality of latching protrusions, and the motor end cover has a plurality of latching openings. The latching protrusions are latched in the latching openings to fix the relative positions of the nesting frame and the motor end cover.

[0033] In one embodiment, the connecting ring in the brushless motor has a plurality of connectors extending along the connecting ring to one side, and the motor end cover has a plurality of plug holes, and the connectors are plugged into the plug holes to fix the relative positions of the motor end cover and the nesting frame.

[0034] In one embodiment, the brushless motor includes a circuit board, the isolation ventilation structure includes two nesting frames, two motor end covers and an outer end cover, the two nesting frames are nested in the stator body oppositely, each motor end cover is respectively covered by the nesting frames, and the circuit board is arranged between one of the motor end covers and the outer end cover.

[0035] In one embodiment, a motor end cover of the brushless motor has an insertion slot suitable for inserting the nesting frame, so as to fix the motor end cover to the nesting frame.

[0036] In one embodiment, a motor end cover of the brushless motor has a snap-in groove suitable for snap-in connection between the circuit board and the outer end cover.

[0037] In one embodiment, the circuit board and the outer end cover of the brushless motor each have at least one ventilation hole connected to the motor body.

[0038] In one embodiment, the circuit board in the brushless motor includes at least one limiting column, the outer end cover has at least one limiting hole, and the limiting column is suitable for passing through the limiting hole to limit the circuit board and the outer end cover.

[0039] In one embodiment, the motor end cover of the brushless motor has a through hole for the rotor to pass through, and the through hole is an extended hole.

[0040] In one embodiment, the motor end cover of the brushless motor has a through hole for a rotating shaft of the rotor to pass through, and the through hole is an extension hole.

[0041] In one embodiment, the motor end cover of the brushless motor has a ventilation hole, and the ventilation pipe is connected to the ventilation hole in a gas-communicating manner.

[0042] In one embodiment, the motor end cover of the brushless motor has a plurality of threading holes, and the coil wire ends pass through the threading holes.

[0043] In one embodiment, the brushless motor includes a circuit board, and the circuit is overlapped on the motor end cover.

[0044] In one embodiment, the motor end cover of the brushless motor has a plurality of induction grooves, and the induction grooves are recessed inward from the surface of the motor end cover to reduce the spacing thickness between the circuit board and the inside of the motor body.

[0045] In one embodiment, the cross-section of the ventilation pipe in the brushless motor is a trapezoidal structure, which increases the air flow rate of the ventilation pipe.

[0046] In one embodiment, the nesting frame in the brushless motor is integrally formed by injection molding.

[0047] In one embodiment, each component of the isolation and ventilation structure in the brushless motor is made of insulating and heat-conductive material.

[0048] In one embodiment, the rotor in the brushless motor includes a magnet and a rotating shaft, the magnet is coaxially mounted on the rotating shaft, and the magnet includes a plurality of reinforcing plates, which are embedded in the magnet to enhance the magnetism of the magnet.

[0049] In one embodiment, the rotor in the brushless motor includes a magnet and a rotating shaft, the magnet is coaxially mounted on the rotating shaft, and the magnet includes a plurality of reinforcing plates, which are attached to the outer surface of the magnet to enhance the magnetism of the magnet.

[0050] In one embodiment, the motor end cover of the brushless motor has at least one guide groove, which cooperates with a fan of the brushless motor to guide the airflow under the fan.

[0051] Another aspect of the present invention provides an isolation ventilation structure, which is applied to a brushless motor, comprising: two nesting frames, two motor end covers and multiple ventilation pipes; the nesting frames can be nested in the stator body in a docking manner, each motor end cover is respectively covered by each nesting frame, and the ventilation pipe can connect the two motor end covers in a gas-connected manner.

[0052] In one embodiment, the two nested frames in the isolation ventilation structure include a plurality of nested units, and each of the nested frames can be mounted on the brushless motor in a butted manner.

[0053] In one embodiment, each of the nesting frames in the isolation and ventilation structure has a plurality of nesting channels suitable for inserting a stator body of the brushless motor.

[0054] In one embodiment, each of the nested monomers in the isolation and ventilation structure includes two extension walls and a bridging top, and the two extension walls are arranged on both sides of the bridging top facing the ground to form the nested channel, so as to facilitate the insertion of the winding monomer and limit the winding monomer to the bridging top.

[0055] In one embodiment, the nested frame in the isolation ventilation structure includes a plurality of connecting walls, and the connecting walls connect the extending walls of adjacent nested monomers to form an insulating channel, and the coil of the brushless motor is accommodated in the insulating channel.

[0056] In one embodiment, each of the nested racks in the isolation ventilation structure has a plurality of inlets, the inlets being connected to the insulation channel, and the inlets are used for the coils of the brushless motor to pass through and enter the insulation channel.

[0057] In one embodiment, the ventilation and dust isolation structure in the isolation and ventilation structure includes a plurality of isolation plates, and the isolation plates block the inlet to isolate the insulation channel from a rotor of the brushless motor.

[0058] In one embodiment, the nested monomers in the isolation ventilation structure include two outer ribs, each of which extends in a bent manner along one side of the extension wall to partially block the insulation channel, and the two outer ribs of adjacent nested monomers form the entrance.

[0059] In one embodiment, the isolation sheet in the isolation and ventilation structure is plugged into the inlet.

[0060] In one embodiment, the nested frame in the isolation and ventilation structure includes a connecting ring, and each of the nested monomers is connected to one side of the connecting ring according to a predetermined layout to facilitate fixing of each of the nested monomers.

[0061] In one embodiment, the connecting ring in the isolation and ventilation structure has a limiting groove surrounding the inner side of the connecting ring, and the motor end cover is limited in the limiting groove.

[0062] In one embodiment, the connecting ring in the isolation ventilation structure has a plurality of latching protrusions, and the motor end cover has a plurality of latching openings. The latching protrusions are latched in the latching openings to fix the relative positions of the nesting frame and the motor end cover.

[0063] In one embodiment, the connecting ring in the isolation ventilation structure has a plurality of connectors extending along the connecting ring to one side, and the motor end cover has a plurality of plug holes, and the connectors are plugged into the plug holes to fix the relative positions of the motor end cover and the nesting frame.

[0064] In one embodiment, the motor end cover in the isolation ventilation structure has a through hole for the rotor of the brushless motor to pass through, and the through hole is an extended hole.

[0065] In one embodiment, the motor end cover in the isolation ventilation structure has a through hole for a rotating shaft of the brushless motor to pass through, and the through hole is an extension hole.

[0066] In one embodiment, the motor end cover in the isolation ventilation structure has a ventilation hole, and the ventilation pipe is connected to the ventilation hole in a gas-communicating manner.

[0067] In one embodiment, the motor end cover in the isolation ventilation structure has a plurality of threading holes for the coil wire ends of the brushless motor to pass through.

[0068] In one embodiment, the motor end cover in the isolation ventilation structure has a plurality of induction grooves, and the induction grooves are recessed inward from the surface of the motor end cover to reduce the spacing thickness of the motor end cover.

[0069] In one embodiment, the cross-section of the ventilation pipe in the isolation ventilation structure is a trapezoidal structure, which increases the air flow rate of the ventilation pipe.

[0070] In one embodiment, the nested frames in the isolation and ventilation structure are integrally formed by injection molding.

[0071] In one embodiment, each component of the isolation and ventilation structure is made of insulating and heat-conductive material.

[0072] Another aspect of the present invention provides an isolation ventilation structure, which is applied to a motor body, comprising: two nesting frames; two motor end covers; and an outer end cover, wherein the nesting frames are relatively nested in the stator body of the motor body, each of the motor end covers is suitable for covering the nesting frames, a circuit board of the brushless motor is suitable for being arranged between one of the motor end covers and an outer end cover, and each of the motor end covers and the outer end cover are gas-connected to the motor body, so that the isolation ventilation structure isolates the motor body while the gas is connected to the outside to dissipate the heat of the motor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] Figure 1 It is a schematic diagram of a brushless motor application block diagram according to a first preferred embodiment of the present invention.

[0074] Figure 2 3D is a schematic three-dimensional diagram of a brushless motor according to the above preferred embodiment of the present invention.

[0075] Figure 3 is a longitudinal sectional view of the above preferred embodiment according to the present invention.

[0076] Figure 4 is a transverse sectional view of the above preferred embodiment according to the present invention.

[0077] Figure 5 is an exploded view of the above preferred embodiment according to the present invention.

[0078] Figure 6This is an airflow guide diagram of the isolation ventilation structure according to the above preferred embodiment of the present invention.

[0079] Figure 7 It is a lower nesting frame and a lower motor end cover of the isolation ventilation structure according to the above preferred embodiment of the present invention.

[0080] Figure 8 The invention relates to an isolation ventilation structure upper nesting frame and an upper motor end cover according to the above preferred embodiment of the invention.

[0081] Fig. 9 It is a schematic diagram of the rotor deformation mode according to the above preferred embodiment of the present invention.

[0082] FIG. 10A to FIG. 10L FIG. 1 is a schematic diagram of an electric tool to which a brushless motor according to the preferred embodiment of the present invention is applied.

[0083] Fig.11 It is a partial stereoscopic schematic diagram of a brushless motor according to a second preferred embodiment of the present invention.

[0084] Fig.12 Schematic diagram of an exploded view of a brushless motor according to a second preferred embodiment of the present invention.

[0085] Fig.13A 13B is a three-dimensional view from different angles of the first nesting frame and the first motor end cover of the brushless motor according to the second preferred embodiment of the present invention.

[0086] Fig.14A 14B is a three-dimensional schematic diagram of a second motor end cover and a second nesting frame of a brushless motor according to a second preferred embodiment of the present invention from different angles.

[0087] Fig.15A , 15B is a three-dimensional schematic diagram of a second motor end cover and a fan of a brushless motor according to a second preferred embodiment of the present invention from different angles. DETAILED DESCRIPTION

[0088] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0089] Those skilled in the art should understand that, in the disclosure of the present invention, the orientation or position relationship indicated by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0090] like Figures 1 to 8 As shown, a brushless motor 100 according to a preferred embodiment of the present invention is shown. The brushless motor 100 includes a motor body 10 and an isolation ventilation structure 20, wherein the isolation ventilation structure 20 is arranged in conjunction with the motor body 10 to isolate the motor body 10, so that the external airflow does not flow directly through the motor body 10, but flows through the motor body 10 through the isolation ventilation structure 20 to dissipate the heat of the motor body 10, so that the brushless motor 100 can be used in harsh working environments such as dust and iron filings, and can be applied to different electric tools 200, for example but not limited to electric drills, electric grinders, electric hammers, electric angle grinders, electric hammers, impact drills, concrete vibrators, electric planers, electric picks, etc.

[0091] Reference Figures 1 to 5 The motor body 10 includes a stator 11 and a rotor 12. The rotor 12 can rotate relative to the stator 11 under the action of magnetic force, thereby converting electrical energy into kinetic energy.

[0092] The stator 11 includes a stator body 111 and at least one coil 112 . The coil 112 is attached to the stator body 111 so that a magnetic field is generated when the coil 112 is in operation. The rotor 12 rotates under the electromagnetic force of the coil 112 .

[0093] The stator body 111 has a rotor channel 1111 , and the rotor 12 is magnetically rotatably disposed in the rotor channel 1111 .

[0094] Further, the stator body 111 includes a plurality of winding monomers 1114, each of which is integrally connected to form a plurality of spaced winding grooves 1112 and a plurality of winding openings 1113 on the outside, so as to accommodate the coil 112, and the winding process can be completed through the winding openings 1113. The winding grooves 1112 are connected to the rotor channel 1111 through the winding openings 1113. In the process of manufacturing the stator 11, the coil 112 passes through the winding openings 1113 from the rotor 12 channel to the winding grooves 1112, so as to be wound around the winding body to form a multi-tie coil 112. More specifically, in one embodiment, the stator body 111 includes six winding monomers 1114, which are arranged symmetrically at intervals, and accordingly, the stator 11 includes six coils 112, which are respectively wound around the corresponding winding monomers 1114.

[0095] In one embodiment, the stator body 111 may be formed by laminating and pressing silicon steel sheets after stamping, while in other embodiments, the stator body 111 may be formed by other methods. Those skilled in the art should understand that the manufacturing method of the stator body 111 is not a limitation of the present invention.

[0096] The rotor 12 includes a rotating shaft 121 and a magnet 122, and the magnet 122 is coaxially mounted on the rotating shaft 121. In particular, the magnet 122 has a central through hole 1223, and the rotating shaft 121 passes through the central through hole 1223, so that when the magnet 122 rotates under the action of electromagnetic force, the rotating shaft 121 rotates along with it, thereby outputting kinetic energy.

[0097] In one embodiment, the magnet 122 includes a reinforcing sheet 1221, which is embedded in the magnet 122 to enhance the magnetism of the magnet 122. In particular, the magnet 122 has a plurality of embedded channels 1222, so that the reinforcing sheet 1221 can be embedded in each of the embedded channels 1222 to enhance the magnetism of the magnet 122. In this embodiment, the reinforcing sheet is a square sheet, and the embedded channel 1222 is a square channel corresponding to the shape of the reinforcing sheet 1221. In other embodiments, the reinforcing sheet 1221 and the embedded channel 1222 can be other shapes, such as strips, prisms, and of course, in another embodiment, the reinforcing sheet 1221 and the embedded channel 1222 can be not provided. It should be understood by those skilled in the art that the structure of the reinforcing sheet 1221 and the embedded channel 1222 is not a limitation of the present invention.

[0098] In one embodiment, the rotor 12 may further include a transmission wheel, and the transmission wheel is installed on the rotating shaft 121 so as to output kinetic energy through the transmission wheel.

[0099] Further, refer to Figures 1 to 8 According to this preferred embodiment of the present invention, the isolation ventilation structure 20 includes a first nesting frame 21 and a second nesting frame 23, and the first nesting frame 21 and the second nesting frame 23 can be nested in the stator body 111. In other words, the first nesting frame 21 and the second nesting frame 23 are respectively inserted into the stator body 111 from both sides of the stator body 111 until the first nesting frame 21 and the second nesting frame 23 are butted against each other.

[0100] It is worth mentioning that the first nested frame 21 and the second nested frame 23 are arranged opposite to each other. When the first nested frame 21 and the second nested frame 23 are completely docked, the stator body 111 can be well isolated. However, it can be understood that the first nested frame and the second nested frame are not limited to being completely docked. In other words, there can be a gap between the first nested frame and the second nested frame, and the distance between the first nested frame and the second nested frame is not a limitation of the present invention.

[0101] The first nested frame 21 has a first central passage 211, and the first central passage 211 corresponds to the rotor passage 1111 of the stator body 111, and the rotor 12 passes through the first central passage 211. Correspondingly, the second nested frame 23 has a second central passage 231, and the second central passage 231 corresponds to the rotor passage 1111 of the stator body 111, and the rotor 12 passes through the second central passage 231. In other words, the first central passage 211 of the first nested frame 21 and the second nested frame 23 can be connected to form a central passage that is consistent with the rotor passage 1111 of the stator body 111, so that the rotor 12 can pass through.

[0102] The first nested frame 21 includes a plurality of first nested monomers 212 , and the structure of the first nested monomers 212 matches the structure of the upper portion of the winding monomers 1114 of the stator body 111 , so as to facilitate the first nested monomers 212 to be sleeved on the corresponding upper portion of the winding monomers 1114 of the stator body 111 .

[0103] The second nested frame 23 includes a plurality of second nested monomers 232 , and the structure of the second nested monomers 232 matches the structure of the lower portion of the winding monomers 1114 of the stator body 111 , so as to facilitate the second nested monomers 232 to be sleeved on the corresponding lower portion of the winding monomers 1114 of the stator body 111 .

[0104] In one embodiment, the first nested monomer 212 and the second nested monomer 232 have the same height, that is, the first nested monomer 212 and the second nested monomer 232 each occupy half of the winding monomer 1114, and are butted in half. That is, the height ratio of the first nested monomer 212 and the second nested monomer 232 is 1:1. In another embodiment of the present invention, the heights of the first nested monomer 212 and the second nested monomer 232 are not the same, for example, the height ratio of the first nested monomer 212 and the second nested monomer 232 is 3:7, 4:6, etc. It should be understood by those skilled in the art that the height ratio of the first nested monomer 212 and the second nested monomer 232 is not a limitation of the present invention.

[0105] The number of the first nested monomers 212 and the second nested monomers 232 corresponds to the number of the winding monomers 1114 of the stator 11, so that the stator body 111 is isolated as a whole by the first nested monomers 212 and the second nested monomers 232. The first nested monomers 212 and the second nested monomers 232 are insulating materials, so as to insulate and isolate the stator body 111. It is worth mentioning that in traditional brushless motors, the coils are usually insulated and isolated by setting an insulating sheet, while in the present invention, the insulation effect is achieved by the cooperation of the first nested monomers 212 and the second nested monomers 232, without the need to set an additional insulating sheet for insulation.

[0106] In other words, the first nested monomers 212 and the second nested monomers 232 insulate and isolate the coils 112 from the stator body 111, and the coils 112 are overlapped and wound around the stator body 111. The number of the first nested monomers 212 and the number of the second nested monomers 232 corresponds to the number of the winding monomers 1114 of the stator body 111, so as to form the motor body 10 with a predetermined number of coils 112.

[0107] In one embodiment, the first nested frame 21 includes six first nested monomers 212, and the position of each first nested monomer 212 corresponds to the winding monomer 1114 of the stator body 111. The second nested frame 23 includes six second nested monomers 232, and the position of each second nested monomer 232 corresponds to the winding monomer 1114 of the stator body 111.

[0108] The first nesting frame 21 includes a first connecting ring 213 , and each of the first nesting units 212 is spaced apart and extends toward one side from the first connecting ring 213 and is connected to the first connecting ring 213 .

[0109] The first nesting unit 212 has a first nesting channel 2121 suitable for accommodating the upper portion of the first winding unit 1114 of the stator body 111 , so that the first nesting frame 21 is inserted and nested in the stator body 111 .

[0110] The first nested monomer 212 includes two first extension walls 2122, which are arranged opposite to each other to form the first nested channel 2121. The first nested monomer 212 includes a first bridging top 2123, which is connected between the two first extension walls 2122. When the first nested monomer 212 is inserted into the stator body 111, the winding monomer body 1114 of the stator body 111 is limited to the first bridging top 2123. In other words, the two first extension walls 2122 and the first bridging top 2123 are integrally bent and connected to form the first nested channel 2121 of a predetermined length.

[0111] The adjacent first nested monomers 212 and the first connecting wall 215 form a first insulating channel 216 , and the shape of the first insulating channel 216 matches the shape of the first winding slot 1112 , so that the first nested monomers 212 can be plugged into the stator 11 body.

[0112] In other words, the first extending wall 2122 and the first connecting wall 215 of the adjacent first nested monomers 212 are integrally connected to form a tubular first insulating channel 216, so that when the winding monomer 1114 of the stator body 111 is inserted into the nested monomer, the tube wall of the tubular first insulating channel 216, i.e., the first extending wall 2122 and the first connecting wall 215, are inserted into the winding slot 1112 of the stator body 111.

[0113] The first nesting frame 21 has a plurality of first inlets 214, and the first inlets 214 are connected to the first central channel 211 and the first insulating channel 216. In particular, the first inlets 214 are in the same shape as the winding opening 1113. During the manufacturing process of the motor body 10, the coil 112 can be wound into the insulating channel through the central channel and the first inlets 214, and wound around the first nested monomer 212.

[0114] Furthermore, the first nested monomer 212 includes two first outer ribs 2124 . Each of the first outer ribs 2124 extends in a bent manner from one side of the first extension wall 2122 to partially cover the winding groove 1112 .

[0115] Furthermore, two first outer ribs 2124 of adjacent first nested monomers 212 form the first inlet 214 .

[0116] The isolation ventilation structure 20 includes a plurality of isolation sheets 26, each of which is suitable for shielding the first inlet 214, isolating the central channel and the insulating channel from each other to prevent debris in the central channel from entering the insulating channel. More specifically, the isolation sheets 26 are insulating isolation sheets.

[0117] Furthermore, each of the first outer ribs 2124 has a step structure, and the step structures of adjacent first outer ribs 2124 form a slot-shaped first inlet 214 , so that the isolation sheet 26 can be plugged into the first inlet 214 .

[0118] Similarly, the second nesting frame 23 includes a second connecting ring 233 , and each of the second nesting units 232 is connected to the second connecting ring 233 by extending from the second connecting ring 233 to one side at intervals.

[0119] The second nesting unit 232 has a second nesting channel 2321 suitable for accommodating the lower portion of the single winding body 1114 of the stator 11 , so that the second nesting frame 23 is inserted and nested in the stator body 111 .

[0120] The second nested monomer 232 includes two second extension walls 2322, which are arranged opposite to each other to form the second nested channel 2321. The second nested monomer 232 includes a second bridging top 2323, which is connected between the two second extension walls 2322. When the second nested monomer 232 is inserted into the stator body 111, the winding monomer 1114 of the stator body 111 is limited to the second bridging top 2323. In other words, the two second extension walls 2322 and the second bridging top 2323 are integrally connected in a bent manner to form the second nested channel 2321 of a predetermined length.

[0121] Adjacent second nested monomers 232 and a second connecting wall 235 form a second insulating channel 236 , and the shape of the second insulating channel 236 matches the shape of the second winding slot 1112 , so that the second nested monomers 232 can be plugged into the stator body 111 .

[0122] In other words, a second extending wall 2322 and a second connecting wall 235 of an adjacent second nested monomer 232 are integrally connected to form a tubular second insulating channel 236, so that when the winding monomer 1114 of the stator body 111 is inserted into the second nested monomer 232, the tube wall of the tubular second insulating channel 236, i.e., the second extending wall 2322 and the second connecting wall 235, are inserted into the winding slot 1112 of the stator body 111.

[0123] The second nesting frame 23 includes a plurality of second inlets 234, and the second inlets 234 are connected to the second central channel 231 and the insulating channel. In particular, the second inlets 234 are consistent in shape with the winding opening 1113. During the manufacturing process of the motor body 10, the coil 112 can be wound into the second insulating channel 236 through the central channel and the second inlets 234, and wound around the second nested monomer 232.

[0124] Furthermore, the second nested monomer 232 includes two second outer ribs 2324 . Each second outer rib 2324 extends in a bent manner from one side of the second extension wall 2322 to partially cover the winding groove 1112 .

[0125] Furthermore, two second outer ribs 2324 of adjacent second nested monomers 232 form the second inlet 234 .

[0126] Each of the isolation sheets 26 is suitable for shielding the second entrance 234, isolating the second central channel 231 and the second insulating channel 236 from each other, so as to prevent debris in the second central channel 231 from entering the second insulating channel 236. More specifically, the isolation sheets 26 shield the corresponding first entrance 214 and the second entrance 234 at the same time, partially shielding the first entrance 214, and the other partially shielding the second entrance 234, so that the first entrance 214, the second entrance 234 and the winding opening 1113 of the stator body 111 are all covered.

[0127] Furthermore, each of the second outer ribs 2324 has a step structure, and the step structures of the adjacent second outer ribs 2324 form a slot-shaped second inlet 234, so that the isolation sheet 26 can be inserted into the second inlet 234. In other words, a first inlet 214 and a second inlet 234 are located in corresponding positions, and the isolation sheet 26 is inserted through the first inlet 214 and the second inlet 234, so that the first inlet 214 and the second inlet 234 are blocked at the same time.

[0128] It is worth mentioning that in this embodiment of the present invention, the first nested frame 21 and the second nested frame 23 are made by integral molding, so that each of the nested monomers 212, 232 and the connecting rings 213, 223 can have a predetermined size and layout, and the structural shape of the nested monomers 212, 232 and the connecting rings 213, 223 is controlled by a mold. In particular, the first nested frame 21 and the second nested frame 23 are integrally molded by insulating materials. In other words, each of the nested monomers 212, 232 and the connecting rings 213, 223 are integrally connected. Of course, in other embodiments of the present invention, the nested monomers 212, 232 can be connected to the connecting rings 213, 223 by bonding, and are not limited to being connected by integral molding.

[0129] The isolation ventilation structure 20 includes a first motor end cover 22 and a second motor end cover 24. The first motor end cover 22 is connected to the first nesting frame 21, and the second motor end cover 24 is connected to the second nesting frame 23. The first motor end cover 22 and the second motor end cover 24 are used to isolate the two ends of the stator body 111 from the outside.

[0130] The dust-proof ventilation mechanism 20 includes at least one ventilation pipe 25, and the ventilation pipe 25 passes through the winding slots 1112 of the stator body 111, spacing the adjacent coils 112. In other words, when the airflow passes through the ventilation pipe 25, it simultaneously passes through the winding slots 1112 of the stator body 111 and the coils 112 in the winding slots 1112. According to this embodiment of the present invention, the ventilation pipe 25 is made of heat-conductive material, the coils 112 are accommodated in the winding slots 1112, and the ventilation pipe 25 is arranged together with the coils 112. When the airflow passes through the ventilation pipe 25, it simultaneously flows through the coils 112, and is spaced by the ventilation pipe 25 to flow through the coils 112, so that the airflow does not directly contact the coils 112, and the impurities in the airflow do not contact the coils 112, and the heat generated on the coils 112 is taken away by the airflow through the heat exchange of the ventilation pipe 25. It is worth mentioning that the ventilation pipe 25 is an insulated heat-conducting pipe, so it can be arranged between the coils 112 and can perform good heat exchange with the coils 112 .

[0131] Further, the first motor end cover 22 has a first through hole 221, and the first through hole 221 is used for the rotation shaft 121 of the rotor 12 to pass through. That is, in the process of assembling the brushless motor 100, the rotor 12 can be inserted into the rotor 12 channel, and then the first motor end cover 22 is inserted to cover the first nesting frame 21, and the rotation shaft 121 of the rotor 12 passes through the first through hole 221. In particular, the first through hole 221 is an extended hole, that is, it extends outward from the first motor end cover 22 by a predetermined length, so that the extended hole wall can cover more of the rotation shaft 121, preventing dust and impurities around the rotation shaft 121 from entering the rotor 12 channel.

[0132] The second motor end cover 24 has a second through hole 241 for the rotor 12 to pass through. In other words, the second through hole 241 corresponds to the rotor channel 1111 of the stator body 111 and the first center channel 211 of the first nesting frame 21 and the second center channel 231 of the second nesting frame 23, and is used for the rotor 12 to pass through. That is to say, in the process of assembling the brushless motor 100, the second motor end cover 24 can be firstly connected to the second nesting frame 23, and then the rotor 12 can be inserted into the rotor 12 channel. Of course, in other embodiments of the present invention, the through hole of the second motor end cover 24 can have a smaller size, for example but not limited to the same size as the first motor end cover 22 and the first through hole 221, for the shaft 121 to pass through. Accordingly, in the process of assembly, the rotor 12 can be firstly inserted into the first rotor channel 1111, and then the first motor end cover 22 and the second motor end cover 24 are respectively plugged into the first nesting frame 21 and the second nesting frame 23 from both ends of the shaft 121.

[0133] In particular, the second through hole 241 can be an extended hole, and the second motor end cover 24 extends outward by a predetermined length, so that the extended hole wall can cover more of the rotating shaft 121 to prevent dust and impurities around the rotating shaft 121 from entering the rotor 12 channel.

[0134] The first motor end cover 22 has at least one first ventilation hole 222, and the second motor end cover 24 has at least one second ventilation hole 242. The first ventilation hole 222 and the second ventilation hole 242 are respectively connected to the ventilation pipe 25 to form an airflow path. In other words, the external airflow can flow into the ventilation pipe 25 through one of the ventilation holes, such as the first ventilation hole 222 or the second ventilation hole 242, and after flowing through the ventilation pipe 25, it flows out through another ventilation hole, such as the second ventilation hole 242 or the first ventilation hole 222, to form a through airflow loop.

[0135] Further, the shapes of the first ventilation holes 222 and the second ventilation holes 242 match the shape of the pipe opening of the ventilation pipe 25, so that the airflow will not flow out from the position where the ventilation pipe 25 and the ventilation holes 222, 242 are connected. The connection method of the ventilation pipe 25 and the ventilation holes 222, 242 is, for example but not limited to, the ventilation pipe 25 is plugged into the ventilation holes 222, 242. The positions and numbers of the first ventilation holes 222, the second ventilation holes 242 and the ventilation pipe 25 correspond to each other, and for example but not limited to, the numbers of the first ventilation holes 222 and the second ventilation holes 242 are 2, 3, 4, 5, 6, and more than 6, preferably 6.

[0136] Furthermore, positions of the first ventilation hole 222 and the second ventilation hole 242 correspond to the first insulating channel 216 of the first nesting frame 21 and the second insulating channel 236 of the second nesting frame 23. When the coil 112 is wound around the insulating channels 216, 236, the ventilation pipe 25 passes through the gaps between adjacent coils 112 and is connected to the first ventilation hole 222 and the second ventilation hole 242, so that when the air flows through the ventilation pipe 25, the heat generated by the coil 112 can be taken away through heat exchange.

[0137] Further, the cross-sectional shape of the ventilation pipe 25 is consistent with the shape of the first ventilation hole 222 and the second ventilation hole 242, so that the two ends of the ventilation pipe 25 can be respectively plugged into the second ventilation hole 222 and the second ventilation hole 242. In particular, the cross-sectional shape of the ventilation pipe 25 is a trapezoidal structure, that is, the ventilation pipe 25 is a columnar structure with a trapezoidal cross-section. Correspondingly, the cross-sectional shapes of the first ventilation hole 222 and the second ventilation hole 242 are trapezoidal structures.

[0138] More specifically, the ventilation pipe 25 has an inner side surface 251 and an outer side surface 252, wherein the inner side surface 251 is narrower and the outer side surface 252 is wider, thereby forming the cross-sectional trapezoidal structure. The inner side surface 251 is opposite to the winding opening 1113, and in particular, the inner side surface 251 and the winding opening 1113 have the same size, so as to shield the winding opening 1113 and prevent dust and impurities in the rotor channel 1111 from entering the insulating channel. The second outer side surface 252 is adjacent to the connecting walls 215, 235 forming the insulating channels 216, 236. It is worth mentioning that the trapezoidal structure of the ventilation pipe 25 can fully utilize the gap space between the coils 112 in the insulating channels 216 and 236 while shielding the winding opening 1113 on the inner side, thereby increasing the gas flow in the insulating channels 216 and 236 and flowing through the ventilation pipe 25 instead of directly contacting the coils 112, thereby preventing impurities or dust from accumulating in the coils 112.

[0139] The first nested monomer 212 of the first nested frame 21 includes a first top rib 2125, which extends outwardly from the first cross-connecting top 2123 to the first motor end cover 22, so as to isolate the gap between the first nested monomer 212 and the first motor end cover 22. Correspondingly, the second nested monomer 232 of the second nested frame 23 includes a second top rib 2325, which extends outwardly from the second cross-connecting top 2323 to the second motor end cover 24, so as to isolate the gap between the second nested monomer 232 and the second motor end cover 24. It is worth mentioning that in the first embodiment of the present invention, the top rib can be a structure with a reduced end, so as to adapt to the first motor end cover 22 and the second motor end cover 24.

[0140] According to this embodiment of the present invention, the first connecting ring 213 has a limiting groove 2131 surrounding the first connecting ring 213 for limiting the first motor end cover 22. In particular, when the first motor end cover 22 is inserted into the first nesting frame 21 and is limited in the limiting groove 2131, the height of the position where the first motor end cover 22 and the first connecting ring 213 are connected is consistent.

[0141] Further, the first connecting ring 213 includes a plurality of latching protrusions 2132, which protrude into the first connecting ring 213. Accordingly, the first motor end cover 22 has a plurality of latching openings 223, which are arranged at the edge of the first motor end cover 22 and are suitable for being latched to the latching protrusions 2132 of the first connecting ring 213, so as to facilitate the relative position determination of the positions of the first motor end cover 22 and the first nesting frame 21. The number and quantity of the latching protrusions 2132 and the latching openings 223 can be set according to requirements. The number of the latching protrusions 2132 and the latching openings 223 is not limited to 2, 3, 4 and more than 4, for example. The position layout of the latching protrusions 2132 and the latching openings 223 can be distributed at equal intervals or at any interval. It should be understood by those skilled in the art that the number and layout of the latching protrusions 2132 and the latching openings 223 are not limitations of the present invention.

[0142] Reference Figures 3 to 5 The brushless motor 100 includes a circuit board 30, and the circuit board 30 is provided with a control circuit of the brushless motor 100. In particular, the shape of the circuit board 30 is consistent with the shape of the first motor end cover 22, so that the circuit board 30 is stacked and arranged to be suitable for the first motor end cover 22. Further, the circuit board 30 has a central hole 31, and the central hole 31 corresponds to the first through hole 221 of the first motor end cover 22.

[0143] The circuit board 30 has at least one ventilation hole 32 for ventilation of the ventilation pipe 25. That is, one end of the ventilation pipe 25 is mounted on the ventilation hole 32 of the circuit board 30, so that the air in the ventilation pipe 25 flows to the outside.

[0144] According to the present invention, the brushless motor 100 can be applied to an electric tool 200. For example, during operation, the circuit board 30 can collect the position signal of the rotor 12 and transmit the collected signal to the control circuit board of the electric tool 200, thereby driving and controlling the electric tool 200 to operate through the brushless motor 100.

[0145] It is worth mentioning that electric tools usually work in a harsh environment. For example, the environment usually contains a lot of dust, iron filings and other impurities, which are not suitable for the operation of traditional brushless motors. According to the present invention, the isolation ventilation structure is combined with the brushless motor, so as to isolate impurities in the environment, so that the brushless motor has better heat dissipation performance, so that the brushless motor can support higher-power electric tools, so that the brushless motor can be used in harsher working environments, thereby expanding the scope of application.

[0146] The power tool 200 includes, but is not limited to, metal cutting power tools, sanding power tools, assembly power tools, forestry power tools, agricultural power tools, gardening power tools, construction and road power tools, mining power tools and other types of power tools. More specifically, but not limited to, electric reamers, magnetic drills, multi-purpose tools, knife saws, profile cutting machines, electric punching shears, electric scissors, electric scrapers, reciprocating saws, beveling machines, weld beveling machines, threading machines, double-edged shears, tapping machines, band saws, pipe saws, miter cutting machines, miter cutting combination saws, electric drills, disc sanders, pendulum sanders, lathe electric grinders, bench grinders, straight disc sanders, vertical disc grinders, reciprocating sanders, polishers, mold electric grinders, trackless irregular

[0147] Circular motion sanders or polishers, angle grinders, polishers, electric grinders for valve seats, grinding machines, belt sanders, electric wrenches, fixed torque electric wrenches, self-tapping screwdrivers, screwdrivers, rivet guns, fixed torque screwdrivers, rivet nut rivet guns, nailing machines, wallboard screwdrivers, tube expanders, woodworking band saws, electric planers, electric plugs, woodworking multi-tools, pruning machines, branch chippers, woodworking scrapers, woodworking lathes, woodworking slotting machines, electric chain saws, thickness planers, trimmers, curved saws, electric milling machines, woodworking blade grinders, woodworking nailing machines, radial arm saws, planers, woodworking miter cutters, electric circular saws, wood drills, grass shears, scissor-type grass shears, pruning shears, lawn trimmers, lawn edge trimmers, lawn loosening machines, mulching mowers, walk-behind mowers, turntable mowers, flail mowers, suspended mowers, hand-held Gardening chip blower, hand-held gardening blower and suction machine, hand-held gardening chip suction machine, drum mower, lawn scarifier, hammer drill, floor polisher, electric hammer, concrete vibrator, stone cutting machine, diamond saw, electric pick, compactor, diamond drill, impact drill, rivet bolt wrench, mixed polishing machine, inserted concrete vibrator, sleeper electric pick, steel bar cutting machine, slotting machine, floor sander, threading machine, attached concrete vibrator, pipe bending machine, plastic welding gun, hot air gun, cloth cutting machine, household water pump, air pump, hair dryer, pipe cleaning machine, flower rolling machine, strapping machine, plaster shears, engraving machine, waxing machine, jack, reciprocating engraving machine, rust remover, electric spray gun, pool cleaning machine, paper shredder, plaster saw, carpet shears, sternum saw, cleaning machine, branch suction machine, dental drill, bone drill.

[0148] In some embodiments of the present invention, reference FIG. 10A to FIG. 10L The brushless motor 100 is applied to different power tools, such as electric drill, electric hammer, electric pick, angle grinder, electric circular saw, aluminum saw, profile cutting machine, water drill, electric chain saw, stone cutting machine, angle polisher, flat sander, wall polisher, belt sander, marble slotting machine, electric wrench, jig saw and other power tools.

[0149] Reference Fig. 10AThe brushless motor 100 is applied to an angle grinder 200A, which is suitable for cutting, grinding and brushing metal and stone.

[0150] Reference Fig. 10B The brushless motor 100 is applied to an electric wrench 200B, which uses the brushless motor as power to tighten high-strength bolts.

[0151] Reference Fig. 10C The brushless motor 100 is applied to an electric hammer 200C, which is powered by the brushless motor and is used to drill holes in concrete, floor slabs, brick walls and stones.

[0152] Reference Fig. 10D The brushless motor 100 is applied to an aluminum sawing machine 200D, which uses the brushless motor as power and is used for cutting various aluminum materials.

[0153] Reference Fig.10E The brushless motor 100 is applied to an angle polisher 200E. The angle polisher 200E uses the brushless motor 100 as a power to rub the surface of the material to remove paint pollution, oxide layer, and shallow marks.

[0154] Reference Fig.10F The brushless motor 100 is applied to an electric circular saw 200F, and the electric circular saw 200F uses the brushless motor as power to perform sawing operations.

[0155] Reference Figure 10G The brushless motor 100 is applied to a water drill 200G. The water drill 200G works underwater and uses the brushless motor 100 as power to drill holes in rocks or cement.

[0156] Reference Fig. 10H The brushless motor 100 is applied to a profile cutting machine 200H. The profile cutting machine 200H uses the brushless motor 100 as power to cut metal square flat tubes, square flat steel, I-beams, channel steel, carbon steel, tubes and other materials.

[0157] Reference Fig.10I The brushless motor 100 is applied to an electric chain saw 200I. The electric chain saw 200I uses the brushless motor 100 as power to operate and saw metal or stone.

[0158] Reference Fig.10J The brushless motor 100 is applied to a stone cutting machine 200J, and the brushless motor is used as a power to cut the stone.

[0159] Reference Figure 10KThe brushless motor 100 is applied to a slotting machine 200K, and the slotting machine 200K uses the brushless motor 100 as power to perform slotting operations when treating cracks in asphalt and cement pavements.

[0160] Reference Fig.10L The brushless motor 100 is applied to a jigsaw 200L, and the jigsaw 200L uses the brushless motor 100 as power to cut metal and non-ferrous metal.

[0161] It is worth mentioning that the circuit board 30 of the brushless motor 100 and the power of the brushless motor 100 can be designed according to the types of different power tools used. The design of the isolation ventilation structure 20 enables the brushless motor 100 to be applied to different power tools, adapting to the harsh environment of dust and iron filings of the power tools, and utilizing the working characteristics of the brushless motor 100 to provide the power tool 200 with greater power and smaller size.

[0162] Reference Figures 5 to 7 , the first motor end cover 22 has at least one first threading hole 224 for passing the line. More specifically, the end of the coil 112 is led out through the first threading hole 224 to facilitate electrical connection to the control circuit board 30. In one embodiment, the first threading hole 224 is arranged at the edge of the first motor end cover 22 and is connected to the outside, which facilitates the lead-out of the coil 112 during the assembly process of the brushless motor 100. Of course, in other embodiments of the present invention, the first threading hole 224 can be arranged at other positions, such as close to the inside and not connected to the outside. The number and position of the first threading hole 224 can be set as needed, for example but not limited to two or three, and more than three equally spaced arrangements. Preferably, the number of the threading holes 224 is 3 equally spaced arrangements. It should be understood by those skilled in the art that the number, position and shape of the first threading holes 224 are not limitations of the present invention.

[0163] The first motor end cover 22 has at least one sensing slot 225, and the sensing slot 225 is used for the components on the circuit board 30 to sense the rotation phase of the rotor 12. It is worth mentioning that the sensing slot 225 is recessed inward from the surface of the first motor end cover 22, thereby reducing the spacing thickness between the circuit board 30 and the rotor 12, so that the sensing of the components on the circuit board 30 is more sensitive and accurate. More specifically, the first motor end cover 22 has a plurality of sensing slots 225, which are arranged around the first through hole 221 of the first motor end cover 22. The number of the sensing slots 225 can be one or more, and preferably, the number of the sensing slots 225 is 6.

[0164] According to this embodiment of the present invention, the second connection ring 233 of the second nesting frame 23 includes a plurality of plug-in components 2331 extending toward one side of the connection ring. Accordingly, the second motor end cover 24 has a plurality of plug-in holes 234 for plugging the plug-in components 2331 of the second connection ring 233 of the second nesting frame 23, so as to facilitate determining the relative positions of the nesting frame and the second motor end cover 24. In other words, the positions and number of the plug-in holes 234 of the second motor end cover 24 correspond to the plug-in components 2331 of the second connection ring 233 of the second nesting frame 23. By way of example but not limitation, the number of the plug-in components 2331 and the plug-in holes 234 is one or more, and preferably, the number of the plug-in components 2331 and the plug-in holes 234 is 6, and they are arranged at equal intervals. In particular, the position of the connector 2331 may correspond to the middle position of the connecting wall, and the position of the connecting hole 234 may correspond to the position of the second vent 242 of the second motor end cover 24 .

[0165] It is worth mentioning that, in an embodiment of the present invention, the first motor end cover 22 and the second motor end cover 24 are manufactured by integral molding, such as integral molding by injection molding, and have insulation properties.

[0166] Reference Fig. 9 , which is another embodiment of the rotor according to the preferred embodiment of the present invention. The rotor 12 is a patch rotor. The rotor 12 includes a rotating shaft 121 and a magnet 122. The magnet 122 is coaxially mounted on the rotating shaft 121. When the magnet 122 rotates under the action of electromagnetic force, the rotating shaft 121 rotates with it, thereby outputting kinetic energy.

[0167] In one embodiment, the magnet 122 includes a reinforcing sheet 1221, which is attached to the outer surface of the magnet 122 to enhance the magnetism of the magnet 122. In this embodiment, the reinforcing sheet 122 is an arc-shaped square sheet, which is attached to the outer surface of the magnet 122. In other embodiments, the reinforcing sheet 1221 can be in other shapes, such as a strip shape. Of course, in another embodiment, the reinforcing sheet 1221 can be omitted or combined with the embedded reinforcing sheet 1221 in the above embodiment. It should be understood by those skilled in the art that the arrangement of the reinforcing sheet 1221 is not a limitation of the present invention.

[0168] According to this embodiment of the present invention, the brushless motor 100 includes an outer shell 40, and the motor body 10 is disposed in the outer shell 40 so as to isolate the motor body 10 from the outside. Furthermore, the stator body 111 is fixed to the outer shell 40. In other words, the outer shell 40 provides a mounting position for the stator body 111.

[0169] The brushless motor further includes a fan 50 for increasing the amount of air entering the brushless motor and improving the heat dissipation efficiency of the brushless motor. Further, the fan 50 is located outside the second motor end cover 24 so as to increase the amount of air entering from the second motor end cover 24 and improve the heat dissipation performance. According to this embodiment of the present invention, the fan 50 is installed on the rotating shaft 121 of the rotor 12.

[0170] Furthermore, the isolation ventilation structure 20 includes a first motor end cover fitting 27 and a second motor end cover fitting 28. The first motor end cover fitting 27 is configured to fit the first motor end cover 22 to isolate the rotor 12 and prevent impurities from reaching the rotor 12.

[0171] like Figures 11 to 15B As shown, it is a brushless motor according to the second preferred embodiment of the present invention. Different from the above preferred embodiment, in this embodiment of the present invention, the isolation ventilation structure 20A does not include the ventilation pipe 25, so that the airflow passing through the brushless motor 100A will not be restricted to the limited space of the ventilation pipe 25, thereby increasing the heat dissipation efficiency of the brushless motor 100A and adapting to brushless motors with higher power. At the same time, through the isolation ventilation structure 20A, the coil and the circuit board are isolated to a certain extent to reduce dust, iron filings and other impurities from entering the brushless motor. On the other hand, in this embodiment, the isolation ventilation structure 20A can be matched with a fan.

[0172] According to this embodiment of the present invention, the isolation ventilation structure 20A includes a first nesting frame 21A, a first motor end cover 22A, a second nesting frame 23A and a second motor end cover 24A.

[0173] The first nesting frame 21A and the second nesting frame 23A are respectively nested in the stator body 111 to isolate the stator body 111. The first motor end cover 22A covers the outside of the first nesting frame 21A to isolate the motor body 10 from one end to prevent external impurities from reaching the motor body 10. The second motor end cover 24A covers the second nesting frame 23A to isolate the motor body 10 from the other end.

[0174] Reference Figures 12 to 13BThe brushless motor 100A includes a circuit board 30A, and the isolation ventilation structure 20A includes a first outer end cover 29A. The circuit board 30A is located between the first motor end cover 22A and the first outer end cover 29A, so that the circuit board 30A is covered by the first outer end cover 29A to prevent impurities in the airflow from reaching the circuit board 30A. In other words, the first motor end cover 22A provides a mounting position for the circuit board 30A, and the first outer end cover 29A covers the circuit board 30A. It is worth mentioning that the circuit board 30A usually includes various electronic components and circuits, such as Hall sensors. Magnetism accumulated on these electronic components will affect the operation of the circuit board and easily accumulate heat. In addition, the circuit board 30A needs to be protected from external contact damage. According to this embodiment of the present invention, the circuit board 30A is arranged between the first motor end cover 22A and the first outer end cover 29A. The first motor end cover 22A provides an installation position for the circuit board 30A, and the first outer end cover 29A shields the circuit board, isolates dust, and protects the circuit board 30A from unnecessary external contact.

[0175] Further, refer to Fig.11 ,12,15A,15B, according to this embodiment of the present invention, the brushless motor 100A includes a fan 50A, and the fan 50A is arranged outside the second motor end cover 24A to increase the gas circulation of the brushless motor 100A. In this embodiment of the present invention, the first outer end cover 29A and the fan 50A structure cooperate so that the airflow flowing with the fan will not directly enter the motor body 10, but will reach the motor body 10 after the buffering effect of the second motor end cover 24A, so that the impurities in the airflow flowing with the fan will not directly reach the motor body 10, but will be blocked by the second motor end cover 24A.

[0176] Specifically, according to this embodiment of the present invention, the first nested rack 21A and the second nested rack 23A can be nested in the stator body 111 in a butted manner. In other words, the first nested rack 21A and the second nested rack 23A can be inserted into the stator body 111 from both sides of the stator body 111, respectively, until the first nested rack 21A and the second nested rack 23A are butted against each other. It can be understood that the first nested rack 21A and the second nested rack 23A are not limited to being completely butted against each other.

[0177] Reference Fig.13A, 13B, the first nested frame 21A has a first central channel 211A, the first central channel 211A corresponds to the rotor channel 1111 of the stator body 111, and the rotor 12 passes through the first central channel 211A. Correspondingly, the second nested frame 23A has a second central channel 231A, the second central channel 231A corresponds to the rotor channel 1111 of the stator body 111, and the rotor 12 passes through the second central channel 231A. In other words, the first central channel 211A of the first nested frame 21A and the second nested frame 23A can be connected to form a central channel that is consistent with the rotor channel 1111 of the stator body 111, so that the rotor 12 can pass through.

[0178] The first nested frame 21A includes a plurality of first nested monomers 212A, and the structure of the first nested monomers 212A matches the structure of the upper portion of the winding monomers 1114 of the stator body 111 , so as to facilitate the first nested monomers 212A to be sleeved on the corresponding upper portion of the winding monomers 1114 of the stator body 111 .

[0179] Reference Fig.14A , 14B, the second nested frame 23A includes a plurality of second nested monomers 232A, and the structure of the second nested monomer 232A matches the structure of the lower portion of the winding monomer 1114 of the stator body 111, so as to facilitate the second nested monomer 232A to be sleeved on the corresponding lower portion of the winding monomer 1114 of the stator body 111.

[0180] In one embodiment, the first nested monomer 212A and the second nested monomer 232A have the same height, that is, the first nested monomer 212A and the second nested monomer 232A each occupy half of the winding monomer 1114, and are butted in half. That is, the height ratio of the first nested monomer 212 and the second nested monomer 232A is 1:1. In another embodiment of the present invention, the heights of the first nested monomer 212A and the second nested monomer 232A are not the same, for example, the height ratio of the first nested monomer 212A and the second nested monomer 232A is 3:7, 4:6, etc. It should be understood by those skilled in the art that the height ratio of the first nested monomer 212A and the second nested monomer 232A is not a limitation of the present invention.

[0181] The number of the first nested monomers 212A and the second nested monomers 232A corresponds to the number of the winding monomers 1114 of the stator 11, so that the stator body 111 is isolated as a whole by the first nested monomers 212A and the second nested monomers 232A. The first nested monomers 212A and the second nested monomers 232A are insulating materials, so that the stator body 111 is insulated and isolated. It is worth mentioning that in traditional brushless motors, the coils are usually insulated and isolated by setting an insulating sheet, while in the present invention, the insulation effect is achieved by the cooperation of the first nested monomers 212A and the second nested monomers 232A, without the need to set an additional insulating sheet for insulation.

[0182] In other words, the first nested monomers 212A and the second nested monomers 232A insulate and isolate the coil 112 from the stator body 111, and the coil 112 is overlapped and wound around the stator body 111. The number of the first nested monomers 212A and the number of the second nested monomers 232A correspond to the number of the winding monomers 1114 of the stator body 111, so as to form the motor body 10 with a predetermined number of coils 112.

[0183] In one embodiment, the first nested frame 21A includes six first nested monomers 212A, and the position of each first nested monomer 212A corresponds to the winding monomer 1114 of the stator body 111. The second nested frame 23A includes six second nested monomers 232A, and the position of each second nested monomer 232A corresponds to the winding monomer 1114 of the stator body 111.

[0184] Reference Fig.13A , 13B, the first nesting frame 21A includes a first connecting ring 213A, and each of the first nesting monomers 212A is connected to the first connecting ring 213A by extending from the first connecting ring 213A to one side at intervals.

[0185] The first nesting unit 212A has a first nesting channel 2121A, which is suitable for accommodating the upper portion of the first winding unit 1114 of the stator body 111 , so that the first nesting frame 21A is inserted and nested in the stator body 111 .

[0186] The first nested monomer 212A includes two first extension walls 2122A, which are arranged opposite to each other to form the first nested channel 2121A. The first nested monomer 212A includes a first bridging top 2123A, which is connected between the two first extension walls 2122A. When the first nested monomer 212A is inserted into the stator body 111, the winding monomer body 1114 of the stator body 111 is limited to the first bridging top 2123A. In other words, the two first extension walls 2122A and the first bridging top 2123A are integrally bent and connected to form the first nested channel 2121A of a predetermined length.

[0187] The adjacent first nested monomers 212A and the first connecting wall 215A form a first insulating channel 216A, and the shape of the first insulating channel 216A matches the shape of the first winding slot 1112 to facilitate the first nested monomers 212A to be inserted into the stator 11 body.

[0188] In other words, the first extension wall 2122A and the first connecting wall 215A of the adjacent first nested monomers 212A are integrally connected to form a tubular first insulating channel 216A, so that when the winding monomer 1114 of the stator body 111 is inserted into the nested monomer, the tube wall of the tubular first insulating channel 216A, i.e., the first extension wall 2122A and the first connecting wall 215A, are inserted into the winding slot 1112 of the stator body 111.

[0189] The first nesting frame 21A has a plurality of first inlets 214A, and the first inlets 214A are connected to the first central channel 211A and the first insulating channel 216A. In particular, the first inlets 214A are consistent in shape with the winding opening 1113. During the manufacturing process of the motor body 10, the coil 112 can be wound into the insulating channel through the central channel and the first inlets 214A, and wound around the first nested monomer 212A.

[0190] Furthermore, the first nested monomer 212A includes two first outer ribs 2124A. Each of the first outer ribs 2124A extends in a bent manner from one side of the first extension wall 2122A to partially cover the winding groove 1112 .

[0191] Furthermore, two first outer ribs 2124A of adjacent first nested monomers 212A form the first inlet 214A.

[0192] The isolation ventilation structure 20A includes a plurality of isolation sheets 26A, each of which is suitable for shielding the first inlet 214A, isolating the central channel 211A, 231A and the insulating channels 216A, 236A from each other to prevent debris in the central channel from entering the insulating channels. More specifically, the isolation sheets 26 are insulating isolation sheets.

[0193] Furthermore, each of the first outer ribs 2124A has a step structure, and the step structures of adjacent first outer ribs 2124A form a slot-shaped first inlet 214A, so that the isolation sheet 26A can be inserted into the first inlet 214A.

[0194] Similarly, refer to Fig.14A , 14B the second nesting frame 23A includes a second connecting ring 233A, and each of the second nesting monomers 232A is connected to the second connecting ring 233A by extending from the second connecting ring 233A to one side at intervals.

[0195] The second nesting unit 232A has a second nesting channel 2321A, which is suitable for accommodating the lower portion of the single winding body 1114 of the stator 11 , so that the second nesting frame 23A is inserted and nested in the stator body 111 .

[0196] The second nested monomer 232A includes two second extension walls 2322A, which are arranged opposite to each other to form the second nested channel 2321A. The second nested monomer 232A includes a second bridging top 2323A, which is connected between the two second extension walls 2322A. When the second nested monomer 232A is inserted into the stator body 111, the winding monomer 1114 of the stator body 111 is limited to the second bridging top 2323A. In other words, the two second extension walls 2322A and the second bridging top 2323A are integrally bent and connected to form the second nested channel 2321A of a predetermined length.

[0197] Adjacent second nested monomers 232A and a second connecting wall 235A form a second insulating channel 236A. The shape of the second insulating channel 236A matches the shape of the second winding slot 1112 , so that the second nested monomer 232A can be plugged into the stator body 111 .

[0198] In other words, a second extension wall 2322A and a second connecting wall 235A of an adjacent second nested monomer 232A are integrally connected to form a tubular second insulating channel 236A, so that when the winding monomer 1114 of the stator body 111 is inserted into the second nested monomer 232A, the tube wall of the tubular second insulating channel 236A, i.e., the second extension wall 2322A and the second connecting wall 235A, are inserted into the winding slot 1112 of the stator body 111.

[0199] The second nesting frame 23A includes a plurality of second inlets 234A, and the second inlets 234A are connected to the second central channel 231A and the second insulating channel 236A. In particular, the second inlets 234 are consistent in shape with the winding opening 1113. During the manufacturing process of the motor body 10, the coil 112 can be wound into the second insulating channel 236A through the central channel and the second inlets 234A, and wound around the second nested monomer 232A.

[0200] Furthermore, the second nested monomer 232A includes two second outer ribs 2324A. Each of the second outer ribs 2324A extends in a bent manner from one side of the second extension wall 2322A to partially cover the winding groove 1112 .

[0201] Furthermore, two second outer ribs 2324A of adjacent second nested monomers 232A form the second inlet 234A.

[0202] Each of the isolation sheets 26A is suitable for shielding the second entrance 234A, isolating the second central channel 231A and the second insulating channel 236A from each other, so as to prevent debris in the second central channel 231A from entering the second insulating channel 236A. More specifically, the isolation sheet 26A shields the corresponding first entrance 214A and the second entrance 234A at the same time, partially shielding the first entrance 214A, and the other partially shielding the second entrance 234A, so that the first entrance 214A, the second entrance 234A and the winding opening 1113 of the stator body 111 are all covered.

[0203] Furthermore, each of the second outer ribs 2324A has a step structure, and the step structures of the adjacent second outer ribs 2324A form a slot-shaped second inlet 234A, so that the isolation sheet 26A can be inserted into the second inlet 234A. In other words, the first inlet 214A and the second inlet 234A are located in corresponding positions, and the isolation sheet 26A is inserted through the first inlet 214A and the second inlet 234A, so that the first inlet 214A and the second inlet 234A are blocked at the same time.

[0204] It is worth mentioning that in this embodiment of the present invention, the first nested frame 21A and the second nested frame 23A are made by integral molding, so that each of the nested monomers 212A, 232A and the connecting rings 213A, 223A can have a predetermined size and layout, and the structural shape of the nested monomers 212A, 232A and the connecting rings 213A, 223A is controlled by a mold. In particular, the first nested frame 21A and the second nested frame 23A are integrally molded by insulating materials. In other words, each of the nested monomers 212A, 232A and the connecting rings 213A, 223A are integrally connected. Of course, in other embodiments of the present invention, the nested monomers 212A, 232A can be connected to the connecting rings 213A, 223A by bonding, rather than being limited to integral molding.

[0205] Furthermore, the first motor end cover 22A has a first through hole 221A, and the first through hole 221A is used for the rotation shaft 121 of the rotor 12 to pass through. That is, in the process of assembling the brushless motor 100, the rotor 12 can be inserted into the rotor 12 channel, and then the first motor end cover 22A is inserted to cover the first nesting frame 21A, and the rotation shaft 121 of the rotor 12 passes through the first through hole 221A. In particular, the first through hole 221A is an extended hole, that is, it extends outward from the first motor end cover 22 by a predetermined length, so that the extended hole wall can cover more of the rotation shaft 121, preventing dust and impurities around the rotation shaft 121 from entering the rotor 12 channel.

[0206] The second motor end cover 24A has a second through-hole 241A for the rotor 12 to pass through. In other words, the second through-hole 241A corresponds to the rotor channel 1111 of the stator body 111 and the first center channel 211A of the first nesting frame 21A and the second center channel 231A of the second nesting frame 23A, and is used for the rotor 12 to pass through. That is to say, in the process of assembling the brushless motor 100A, the second motor end cover 24A can be first covered on the second nesting frame 23A, and then the rotor 12 can be inserted into the rotor 12 channel. Of course, in other embodiments of the present invention, the through-hole of the second motor end cover 24A can have a smaller size, for example but not limited to the same size as the first motor end cover 22A and the first through-hole 221A, for the shaft 121 to pass through. Accordingly, in the process of assembly,

[0207] The rotor 12 may be first inserted into the first rotor channel 1111 , and then the first motor end cover 22A and the second motor end cover 24A are respectively plugged into the first nesting frame 21A and the second nesting frame 23A from both ends of the rotating shaft 121 .

[0208] In particular, the second through hole 241A can be an extended hole, and the second motor end cover 24A extends outward by a predetermined length, so that the extended hole wall can cover more of the rotating shaft 121 to prevent dust and impurities around the rotating shaft 121 from entering the rotor 12 channel.

[0209] The first motor end cover 22A has at least one first ventilation hole 222A, and the second motor end cover 24A has at least one second ventilation hole 242A. The first ventilation hole 222A and the second ventilation hole 242A are respectively connected to the insulating channel 216A to form an airflow path. In other words, the external airflow can flow into the insulating channel 216A through one of the first ventilation holes 222A, such as the first ventilation hole 222A or the second ventilation hole 242A, and after flowing through the insulating channel 216A, it flows out through another ventilation hole, such as the second ventilation hole 242A or the first ventilation hole 222A, to form a through airflow loop.

[0210] Further, the positions of the first ventilation hole 222A and the second ventilation hole 242A correspond to the first insulating channel 216A of the first nested frame 21A and the second insulating channel 236A of the second nested frame 23A. When the coil 112 is wound around the insulating channels 216A, 236A, airflow passes through the gaps between adjacent coils 112 and connects to the first ventilation hole 222A and the second ventilation hole 242A, so that in the process of airflow passing through the insulating channel 216A, heat generated by the coil 112 can be removed through heat exchange.

[0211] It is worth mentioning that, unlike the above-mentioned embodiment, in this embodiment, there is no ventilation pipe 25, so the first ventilation hole 222A of the first motor end cover 22A and the second ventilation hole 242A of the second motor end cover 24A do not need to cooperate with the ventilation pipe. The first ventilation hole 222A and the second ventilation hole 224A of the first motor end cover 22A can cooperate with the insulating channel 216A, and the shape, number, and layout position of the first ventilation hole 222A of the first motor end cover 22A and the second ventilation hole 242A of the second motor end cover 24A can be set according to the position and shape of the insulating channel. It should be understood by those skilled in the art that the present invention is not limited in this respect.

[0212] The first nested monomer 212A of the first nested frame 21A includes a first top rib 2125A, and the first top rib 2125A extends outward from the first cross-connection top 2123A to the first motor end cover 22A, so as to isolate the gap between the first nested monomer 212A and the first motor end cover 22A. Correspondingly, the second nested monomer 232A of the second nested frame 23A includes a second top rib 2325A, and the second top rib 2325A extends outward from the second cross-connection top 2323A to the second motor end cover 24A, so as to isolate the gap between the second nested monomer 232A and the second motor end cover 24A.

[0213] According to this embodiment of the utility model, the first connecting ring 213A has a limiting groove 2131A, which surrounds the first connecting ring 213A and is used to limit the first motor end cover 22A. In particular, when the first motor end cover 22A is inserted into the first nesting frame 21A and is limited in the limiting groove 2131A, the height of the position where the first motor end cover 22A and the first connecting ring 213A are connected is consistent.

[0214] Further, the first connecting ring 213A includes a plurality of latching protrusions 2132A, which protrude into the first connecting ring 213A. Accordingly, the first motor end cover 22A has a plurality of latching openings 223A, which are arranged at the edge of the first motor end cover 22A and are suitable for being latched to the latching protrusions 2132A of the first connecting ring 213A, so as to facilitate the relative position determination of the positions of the first motor end cover 22A and the first nesting frame 21A. The number and quantity of the latching protrusions 2132A and the latching openings 223A can be set according to requirements. The number of the latching protrusions 2132A and the latching openings 223A is, for example, not limited to 2, 3, 4 and more than 4. The position layout of the latching protrusions 2132A and the latching openings 223A can be distributed at equal intervals or at any interval. Those skilled in the art should understand that the number and layout of the locking protrusions 2132 and the locking openings 223 are not limitations of the present invention.

[0215] Reference Figures 12 to 13B, the first motor end cover 22A has at least one first threading hole 224A for passing the line. More specifically, the end of the coil 112 is led out through the first threading hole 224A to facilitate electrical connection to the control circuit board 30A. In one embodiment, the first threading hole 224A is arranged at the edge of the first motor end cover 22A and is connected to the outside, which facilitates the lead-out of the coil 112 during the assembly process of the brushless motor 100A. Of course, in other embodiments of the present invention, the first threading hole 224A can be arranged at other positions, such as close to the inside and not connected to the outside. The number and position of the first threading hole 224A can be set as needed, for example but not limited to two or three, and more than three equally spaced arrangements. Preferably, the number of the first threading holes 224A is 3 equally spaced arrangements. It should be understood by those skilled in the art that the number, position and shape of the first threading holes 224A are not limitations of the present invention.

[0216] The first motor end cover 22A has at least one sensing groove, and the sensing groove is used for the components on the circuit board 30A to sense the rotation phase of the rotor 12. It is worth mentioning that the sensing groove is recessed inward from the surface of the first motor end cover 22A, thereby reducing the spacing thickness between the circuit board 30A and the rotor 12, making the sensing of the components on the circuit board 30A more sensitive and accurate. More specifically, the first motor end cover 22A has a plurality of sensing grooves, which are arranged around the first through hole 221 of the first motor end cover 22A. The number of the sensing grooves can be one or more.

[0217] According to this embodiment of the present invention, the second connecting ring 233A of the second nesting frame 23A includes a plurality of plug-in components 2331A extending toward one side of the connecting ring. Accordingly, the second motor end cover 24A has a plurality of plug-in holes 234A for plugging the plug-in components 2331A of the second connecting ring 233A of the second nesting frame 23A, so as to facilitate determining the relative position of the second nesting frame 23A and the second motor end cover 24A. In other words, the position and number of the plug-in holes 234A of the second motor end cover 24A correspond to the plug-in components 2331A of the second connecting ring 233A of the second nesting frame 23A. By way of example but not limitation, the number of the plug-in components 2331A and the plug-in holes 234A is one or more, and preferably, the number of the plug-in components 2331A and the plug-in holes 234A is 6, and they are arranged at equal intervals. In particular, the position of the connector 2331A may correspond to the middle position of the connecting wall, and the position of the connector hole 234 may correspond to the position of the second vent 242A of the second motor end cover 24A.

[0218] It is worth mentioning that, in one embodiment of the present invention, the first motor end cover 22A and the second motor end cover 24A are manufactured by integral molding, such as integral molding by injection molding, and have insulation properties.

[0219] Reference Figures 12 to 13B The first motor end cover 22A has a first insertion slot 226A for limiting the first top rib 2125A of each first nesting frame 21A. In other words, when the first motor end cover 22A covers the first nesting frame 21A, the first top rib 2125A is suitable for being inserted into the first insertion slot 226A.

[0220] The first motor end cover 22A has a first clamping groove 227A for clamping the circuit board 30 and the first outer end cover 29A. In other words, the first outer end cover 29A and the circuit board 30A are laminated and clamped to the first motor end cover 22A.

[0221] The first outer end cover 29A has a first outer through hole 291A for the motor body 10 to pass through. In other words, when assembling the brushless motor, the motor body 10 can pass through the first outer through hole 291A of the first outer end cover 29A, the central hole 31A of the circuit board 30A, and the through hole 221A of the first motor end cover 22A to reach the first central channel 211A of the nesting frame 21A.

[0222] The circuit board 30A has at least one ventilation hole 32A for ventilation. The ventilation hole 32A is connected to the insulating channel. In this embodiment, the ventilation hole of the circuit board does not need to cooperate with the ventilation pipe, but only needs to be connected to the insulating channel 216A, so that the gas in the insulating channel 216A flows to the outside to dissipate the heat of the motor body 10.

[0223] The first outer end cover 29A has at least one first outer ventilation hole 292A, which is connected to the ventilation hole 32A of the circuit board 30A and the outside. In other words, the first outer ventilation hole of the first outer end cover is connected to the first insulating channel 216A of the first nesting frame.

[0224] Further, according to this embodiment, the circuit board 30A includes at least one limiting column 33A for limiting the first outer end cover 29A. Accordingly, the first outer end cover 29A has at least one limiting hole 293A. When the first outer end cover 29A overlaps the circuit board 30A, the limiting column 32 of the circuit board 30A passes through the limiting hole 293A, thereby limiting the outer end cover to the circuit board 30A.

[0225] The first outer end cover 29A may also have at least one lead hole 294A for the lead wires of the brushless motor to pass through. Correspondingly, the circuit board 30A may have at least one line hole 34A for the lead wires of the brushless motor to pass through.

[0226] Further, refer to Figures 14A to 15B According to this embodiment of the present invention, the second motor end cover 24A has a second insertion groove 246A for limiting the second top rib 2325A of the second nesting frame 23A, so that the second motor end cover 24A is fixed to the second nesting frame 23A.

[0227] The second motor end cover 24A has a guide groove 247A for guiding airflow. That is, when the fan 50 rotates with the rotating shaft 121 of the rotor 12 outside, the airflow is guided by the guide groove 247A of the second motor end cover 224A and flows without directly entering the second ventilation hole 242A of the second motor end cover 24A, thereby blocking dust and impurities. In other words, the fan groove 247A of the second motor end cover 24A has the function of guiding airflow and blocking impurities.

[0228] Accordingly, refer to Fig.15A , 15B, the fan 50A includes a protruding ridge 51A extending into the guide groove 247A to facilitate guiding the airflow into the guide groove 247A.

[0229] Furthermore, the isolation ventilation structure 20A includes a first motor end cover fitting 27 and a second motor end cover fitting 28 .

[0230] The first motor end cover fitting 27 is configured to fit the first motor end cover 22 to isolate the rotor 12 and prevent impurities from reaching the rotor 12 .

[0231] Similarly, the brushless motor may further include an outer shell 40 , and the motor body 10 is fixed to the outer shell 40 .

[0232] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A brushless motor, characterized in that: include: a motor body; and - Isolation ventilation structure; The motor body includes a stator and a rotor; The stator includes a stator body and at least one coil, wherein the coil is attached to the stator body; the stator body includes at least one rotor channel, wherein the rotor is magnetically rotatably arranged in the stator channel, and when the coil is working, the rotor rotates under the action of electromagnetic force; The isolation ventilation structure is nested in the stator body to isolate the coil, and the airflow passes through the stator through the ventilation structure, so that the airflow does not directly contact the coil of the stator, so that the brushless motor is suitable for an electric tool; The isolation ventilation structure includes two nesting frames, two motor end covers and a plurality of ventilation pipes. The nesting frames can be nested in the stator body in abutting manner. Each motor end cover is covered by each nesting frame. The ventilation pipe passes through the stator body, and the gas is connected to the two motor end covers, so that the external airflow is isolated from the inside of the stator body. The brushless motor comprises a circuit board, which is overlapped with the motor end cover; the motor end cover has a plurality of induction slots, which are recessed inward from the surface of the motor end cover to reduce the spacing thickness between the circuit board and the inside of the motor body; The stator body includes a plurality of winding monomers, and the two nesting frames include a plurality of nesting monomers, the shapes of the nesting monomers match those of the winding monomers, and the nesting monomers are nested in the winding monomers; The nesting frame includes a connecting ring, and each of the nesting monomers is connected to one side of the connecting ring according to a predetermined layout; the connecting ring has a plurality of plug-in connectors extending along the connecting ring to one side, and the motor end cover has a plurality of plug-in holes, the plug-in connectors are plugged into the plug-in holes, and the ends of the plug-in connectors extend out of the plug-in holes to fix the relative positions of the motor end cover and the nesting frame.

2. The brushless motor according to claim 1, characterized in that: The two nesting frames can be nested in the stator body in abutting relationship.

3. The brushless motor according to claim 1, characterized in that: Each nesting frame has a plurality of nesting channels suitable for inserting the winding unit, so that the nesting frame is nested in the stator body in an inserting manner.

4. The brushless motor according to claim 3, characterized in that: Each of the nested monomers includes two extension walls and a bridging top, and the two extension walls are arranged opposite to each other on both sides of the bridging top to form the nested channel, so as to facilitate the insertion of the winding monomer and limit the winding monomer to the bridging top.

5. The brushless motor according to claim 4, characterized in that: The nesting frame includes a plurality of connecting walls, wherein the connecting walls connect the extending walls of adjacent nesting units to form an insulating channel, and the coil is accommodated in the insulating channel.

6. The brushless motor according to claim 5, characterized in that: The stator body has a plurality of winding grooves which are formed by the winding units, and the insulating channel tube walls are accommodated in the winding grooves.

7. The brushless motor according to claim 1, characterized in that: The stator body has a plurality of winding slots formed by the winding units, and the coils are insulated and isolated by the nested frames and wound around the winding units.

8. The brushless motor according to claim 5, characterized in that: The stator body has a plurality of winding openings, which are connected to the rotor channel, and each nesting frame has a plurality of inlets, which match the winding openings.

9. The brushless motor according to claim 8, characterized in that: The isolation ventilation structure includes a plurality of isolation plates, and the isolation plates block the inlet to isolate the insulation channel and the rotor channel.

10. The brushless motor according to claim 9, characterized in that: The nested monomers include two outer ribs, each of which extends in a bent manner along one side of the extension wall to partially block the insulating channel, and the two outer ribs of the adjacent nested monomers form the entrance.

11. The brushless motor according to claim 10, characterized in that: The isolation sheet is plugged into the inlet.

12. The brushless motor according to claim 10, characterized in that: The connecting ring has a limiting groove surrounding the inner side of the connecting ring, and the motor end cover is limited in the limiting groove.

13. The brushless motor according to claim 10, characterized in that: The connecting ring has a plurality of latching protrusions, and the motor end cover has a plurality of latching openings. The latching protrusions are latched in the latching openings to fix the relative positions of the nesting frame and the motor end cover.

14. The brushless motor according to claim 1, characterized in that: The brushless motor includes a circuit board, the isolation ventilation structure also includes an outer end cover, the two nesting frames are nested in the stator body oppositely, each motor end cover is covered by the nesting frame respectively, and the circuit board is arranged between one motor end cover and the outer end cover.

15. The brushless motor according to claim 14, characterized in that: The motor end cover has an insertion slot suitable for inserting the nesting frame, so as to fix the motor end cover to the nesting frame.

16. The brushless motor according to claim 15, characterized in that: The motor end cover has a snap-in groove suitable for snap-in connection between the circuit board and the outer end cover.

17. The brushless motor according to claim 16, characterized in that: The circuit board and the outer end cover each have at least one ventilation hole connected to the motor body.

18. The brushless motor according to claim 17, characterized in that: The circuit board includes at least one limiting column, the outer end cover has at least one limiting hole, and the limiting column is suitable for passing through the limiting hole, so as to limit the circuit board and the outer end cover.

19. The brushless motor according to any one of claims 1 to 18, characterized in that: The motor end cover has a through hole for the rotor to pass through, and the through hole is an extended hole.

20. The brushless motor according to any one of claims 1 to 18, characterized in that: The motor end cover has a through hole for a rotating shaft of the rotor to pass through, and the through hole is an extended hole.

21. The brushless motor according to any one of claims 1 to 18, characterized in that: The motor end cover has a ventilation hole, and the ventilation pipe is connected to the ventilation hole in a gas-communicating manner.

22. The brushless motor according to any one of claims 1 to 18, characterized in that: The motor end cover has at least one threading hole, and the coil wire end passes through the threading hole.

23. The brushless motor according to any one of claims 1 to 18, characterized in that: The cross section of the ventilation pipe is a trapezoidal structure, which increases the air flow rate of the ventilation pipe.

24. The brushless motor according to any one of claims 1 to 18, characterized in that: The nesting frame is integrally formed by injection molding.

25. The brushless motor according to any one of claims 1 to 18, characterized in that: Each component of the isolation and ventilation structure is made of insulating heat-conducting material.

26. The brushless motor according to any one of claims 1 to 18, characterized in that: The rotor includes a magnet and a rotating shaft. The magnet is coaxially mounted on the rotating shaft. The magnet includes a plurality of reinforcing sheets, which are embedded in the magnet to enhance the magnetism of the magnet.

27. The brushless motor according to any one of claims 1 to 18, characterized in that: The rotor comprises a magnet and a rotating shaft. The magnet is coaxially mounted on the rotating shaft. The magnet comprises a plurality of reinforcing sheets which are attached to the outer surface of the magnet to enhance the magnetism of the magnet.

28. The brushless motor according to any one of claims 1 to 18, characterized in that: The motor end cover has at least one guide groove, which cooperates with a fan of the brushless motor to guide the airflow below the fan.

Images