CN107508412A - Brushless electric machine and its isolation aeration structure - Google Patents

Abstract

A brushless motor and its isolated ventilation structure, wherein the brushless motor includes: a motor body and an isolated ventilation structure; the motor body includes a stator and a rotor; the stator includes a stator body and at least one coil, The coil is attached to the stator main body; the stator main body includes at least one rotor passage, and the rotor is magnetically rotatable disposed in the stator passage. When the coil is working, the rotor is under the action of electromagnetic force rotation; the ventilation structure is nested in the stator main 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

Brushless motor and its isolated ventilation structure

technical field

The present invention relates to the field of brushless motors, and further relates to a brushless motor and its isolated ventilation structure, and the brushless motor is suitable for electric tools.

Background technique

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

The motor is an important part of the power tool, but it is limited to the use environment of the power tool, and the power tool generally uses a series motor. The series motor is based on its own principle and structure, with low power and large volume. Electric tools are generally hand-held, so it is extremely inconvenient to use.

Based on its own working principle, brushless DC motors have many advantages over series motors, such as high speed, high power, small size, light weight, and long life. These advantages are exactly what power tools need. The traditional brushless motor includes a rotor and a stator. The rotor includes a magnetic steel and an iron core on the rotating shaft. The stator includes a wound coil. After the coil is energized, a magnetic field is generated, and the magnetic steel on the rotor is induced. The force drives the rotor to rotate.

In this structure, since the stator is made up of multi-turn coils, heat is easy to accumulate, and in order to ensure good heat dissipation performance, the stator is usually provided with a ventilation channel, and the coil is placed in such a ventilation channel . In other words, the coil is in direct contact with the inflowing air from the outside, and the heat from the surface of the coil is taken away by the air flow through the coil.

The structure of the brushless motor helps to reduce the heat of the body 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 it is clean and cannot contain too much dust or impurities. Because the impurities carried in the air are easy to accumulate on the surface of the stator coil, so that the space of the coil becomes smaller and smaller, the temperature of the motor rises sharply and is burned; on the other hand, if impurities such as iron filings accumulate on the coil, It is easy to cause a short circuit of the coil and burn the machine. This requirement limits the use environment of traditional brushless motors, that is, it can only be used in a relatively clean environment, while the working environment of electric tools, a large amount of dust, iron filings, etc., is obviously not suitable for brushless motors. Therefore, various advantages of the brushless motor cannot be applied to electric tools.

In summary, there is a great need for a brushless motor that has less 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, such as various electric tools.

Contents of the invention

One object of the present invention is to provide a brushless motor and its isolation ventilation structure, wherein the brushless motor includes an isolation ventilation structure, which can thermally isolate the airflow flowing through the brushless motor, so that the airflow can pass through the isolation ventilation structure. The structure flows through the brushless motor without direct contact with other parts of the brushless motor, thereby avoiding the impact of impurities in the airflow on the brushless motor.

One object of the present invention is to provide a brushless motor and its isolation and ventilation structure, wherein the brushless motor includes at least a stator body and at least one coil, the isolation and ventilation structure includes two end covers and at least one ventilation pipe, the The end covers cover both ends of the stator main body, and the ventilation pipe is provided with the coil and communicated with the two end covers, so that the airflow entering from the outside flows through the coil under the isolation of the ventilation pipe.

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 monomers, and the isolation and ventilation structure includes two nesting frames, and the nesting frames can be nested against the ground. Sleeved on the stator main body, the end caps are respectively covered on corresponding nesting frames, so as to isolate the stator and stably fix the end caps.

An object of the present invention is to provide a brushless motor and its isolation and ventilation structure, wherein the nesting frame includes at least one nesting unit, and the nesting unit matches the structure of the winding unit, through The nesting unit insulates and isolates the winding unit, and the coil is wound on the winding unit in an insulating and isolated manner by the nesting unit, without a separate insulating component.

An object of the present invention is to provide a brushless motor and its isolation and ventilation structure, wherein the nesting frame includes at least one connecting wall, which is connected to form an insulating channel between adjacent nesting units, and the coil is accommodated in the insulating channel.

An object of the present invention is to provide a brushless motor and its isolation and ventilation structure, wherein the adjacent nested cells include an extended edge and a spacer, and the extended edges of the adjacent nested cells form a The extension slot, the spacer is adapted to be inserted into the extension slot, so as to isolate the coil from the rotor of the brushless motor.

An object of the present invention is to provide a brushless motor and its isolated ventilation structure, wherein the two end covers have at least one ventilation hole, communicated with the ventilation pipe, so that the external airflow passes through the brushless motor through the ventilation pipe. motor.

One object of the present invention is to provide a brushless motor and its isolation and ventilation structure, wherein the isolation and 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 make the brushless motor Brush motors can be used in harsh environments, such as the working environment of power tools.

In order to achieve at least one of the above objectives of the present invention, one aspect of the present invention provides a brushless motor, the brushless motor 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 main body and at least one coil, the coil is attached to the stator main body; the stator main body includes at least one rotor passage, and the rotor is magnetically rotatably disposed in the stator passage , when the coil works, the rotor rotates under the action of electromagnetic force; the ventilation structure is nested in the stator to isolate the coil, and the air flow passes through the stator through the ventilation structure, thereby Air flow does not directly contact the coils of the stator, making the brushless motor suitable for use in a power tool.

In one embodiment, the isolation ventilation structure in the brushless motor includes two nesting frames, two end covers and a plurality of ventilation pipes, the nesting frames can be grounded and nested in the stator body, each The end covers respectively cover the nesting frames, the ventilation pipe passes through the stator main body, and the gas is connected to the two end covers, so that the external air flow can circulate in isolation from the interior of the stator main body.

In one embodiment, the stator main body of the brushless motor includes a plurality of winding monomers, the two nesting frames include a plurality of nesting monomers, the nesting monomers and the nesting The shapes of the monomers are matched, and the nesting monomers are nested in the winding monomers.

In one embodiment, in the brushless motor, the two nesting frames can be nested in the stator main body but grounded.

In one embodiment, each of the nesting frames in the brushless motor has a plurality of nesting channels, which are suitable for inserting into the winding monomer, so that the nesting and plug-in grounding are nested in the stator body.

In one embodiment, each of the nested cells in the brushless motor includes two extension walls and a bridging top, and the two extending walls are arranged opposite to the ground on both sides of the bridging top, forming the The nesting channel is used to insert the winding monomer, and the winding monomer is limited to the jumper top.

In one embodiment, the nesting frame in the brushless motor includes a plurality of connecting walls, and the connecting walls connect the extension walls of the adjacent nesting cells to form an insulating channel. A coil is accommodated in the insulating channel.

In one embodiment, the stator main body of the brushless motor has a plurality of winding slots, which are formed at intervals by the winding monomer, and the insulation channel tube wall is accommodated in the winding slots .

In one embodiment, the stator main body of the brushless motor has a plurality of winding slots, which are formed at intervals by the winding monomer, and the coil is wound on the Winding unit.

In one embodiment, the stator body in the brushless motor has a plurality of winding openings, the winding openings communicate with the rotor channel, each of the nesting frames has a plurality of inlets, the inlets and the Match the winding port described above.

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

In one embodiment, the nested unit in the brushless motor includes two outer ribs, and each outer rib extends in a bent manner along one side of the extension wall to partially cover the insulating channel, The two outer ribs adjacent to the nested cells form the inlet.

In one embodiment, the spacer in the brushless motor is plugged into the inlet.

In one embodiment, the nesting frame in the brushless motor includes a connecting ring, and each nesting unit is connected to one side of the connecting ring according to a predetermined layout, so as to fix each nesting unit. Set of monomers.

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

In one embodiment, the connecting ring in the brushless motor has a plurality of locking protrusions, the end cover has a plurality of locking openings, and the locking protrusions are located in the locking openings, The relative positions of the nesting frame and the end cover are fixed.

In one embodiment, the connecting ring in the brushless motor has a plurality of plugs extending to one side along the connecting ring, the end cover has a plurality of plug holes, and the plugs Inserted into the insertion hole, the relative position of the end cover and the nesting frame is fixed.

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

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

In one embodiment, one of the end covers of the brushless motor has a locking groove, which is suitable for locking the circuit board and the outer end cover.

In one embodiment, the circuit board of the brushless motor and the outer end cover each have at least one ventilation hole, communicating with the motor body.

In one embodiment, the circuit board in the brushless motor includes at least one limiting post, the outer end cover has at least one limiting hole, and the limiting post is adapted to pass through the limiting hole , so as to limit the circuit board and the outer end cover.

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

In one embodiment, the 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 extended hole.

In one embodiment, the end cover of the brushless motor has a ventilation hole, and the ventilation pipe is connected to the ventilation hole in gas communication.

In one embodiment, the end cover of the brushless motor has a plurality of threading holes, and the ends of the coil wires are passed through the threading holes.

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

In one embodiment, the end cover of the brushless motor has a plurality of induction slots, and the induction slots are recessed from the surface of the end cover to reduce the distance between the circuit board and the inside of the motor body. Interval thickness.

In one embodiment, the section of the ventilation pipe in the brushless motor is a trapezoidal structure, which increases the air flow of the ventilation pipe.

In one embodiment, the nest frame in the brushless motor is integrally formed by injection molding.

In one embodiment, each component of the isolation and ventilation structure in the brushless motor is made of insulating and heat-conducting materials.

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, the magnet includes a plurality of reinforcing pieces, and the reinforcing pieces are Embedded in the magnet, the magnetic properties of the magnet are enhanced.

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, the magnet includes a plurality of reinforcing pieces, and the reinforcing pieces are Attached to the outer surface of the magnet to enhance the magnetism of the magnet.

In one embodiment, the 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.

Another aspect of the present invention provides an isolated ventilation structure applied to a brushless motor, which includes: two nesting frames, two end covers and a plurality of ventilation pipes; the nesting frame can be grounded and nested in the stator The main body and each of the end caps cover each of the nesting frames respectively, and the ventilation pipe can connect the two end caps in a gas-communicative manner.

In one embodiment, the two nesting frames in the isolated ventilation structure include a plurality of nesting units, and each of the nesting frames can be connected to the ground and installed on the brushless motor.

In one embodiment, each nesting frame in the isolation ventilation structure has a plurality of nesting channels, which are suitable for inserting into a stator body of the brushless motor.

In one embodiment, each of the nested cells in the isolated ventilation structure includes two extension walls and a bridging roof, and the two extending walls are arranged opposite to the ground on both sides of the bridging roof, forming the The nesting channel is used to insert the winding monomer, and the winding monomer is limited to the jumper top.

In one embodiment, the nesting frame in the isolation ventilation structure includes a plurality of connecting walls, and the connecting walls connect the extension walls of the adjacent nesting cells to form an insulating channel, and the Coils of the brushless motor are accommodated in the insulating channel.

In one embodiment, each of the nested frames in the isolated ventilation structure has a plurality of inlets, and the inlets are connected to the insulation channel, and the inlets are used for the coils of the brushless motor to pass into the Insulation channel described above.

In one embodiment, the ventilation and dust isolation structure in the isolation and ventilation structure includes a plurality of isolation sheets, and the isolation sheets cover the entrance, and connect the insulation passage to a rotor of the brushless motor. isolation.

In one embodiment, the nested unit in the isolation and ventilation structure includes two outer ribs, and each outer rib extends in a bent manner along one side of the extension wall to partially cover the insulating passage, The two outer ribs adjacent to the nested cells form the inlet.

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

In one embodiment, the nesting frame in the isolation ventilation structure includes a connecting ring, and each nesting unit is connected to one side of the connecting ring according to a predetermined layout, so as to fix each nesting unit. Set of monomers.

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

In one embodiment, in the isolation ventilation structure, the connecting ring has a plurality of locking protrusions, the end cover has a plurality of locking openings, and the locking protrusions are located in the locking openings, The relative positions of the nesting frame and the end cover are fixed.

In one embodiment, in the isolation ventilation structure, the connecting ring has a plurality of inserts extending to one side along the connecting ring, the end cover has a plurality of inserting holes, and the inserts Inserted into the insertion hole, the relative position of the end cover and the nesting frame is fixed.

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

In one embodiment, the end cover in the isolated ventilation structure has a through hole for a rotating shaft of the brushless motor to pass through, and the through hole is an extended hole.

In one embodiment, in the isolation ventilation structure, the end cover has a ventilation hole, and the ventilation pipe is gas-communicatively connected to the ventilation hole.

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

In one embodiment, in the isolation and ventilation structure, the end cover has a plurality of induction slots, and the induction slots are recessed from the surface of the end cover to reduce the interval thickness of the end cover.

In one embodiment, the section of the ventilation pipe in the isolation ventilation structure is a trapezoidal structure, which increases the air flow of the ventilation pipe.

In one embodiment, the nesting frame in the isolation ventilation structure is integrally formed by injection molding.

In one embodiment, each component of the isolated ventilation structure is made of insulating and heat-conducting materials.

Another aspect of the present invention provides an isolation and ventilation structure applied to a motor body, which includes: two nesting frames; two end covers; and an outer end cover, wherein the nesting frames are nested relatively to the motor The stator body of the body, each of the end covers is suitable for covering the nesting frame, a circuit board of the brushless motor is suitable for being arranged between one of the end covers and an outer end cover, and each of the The end cover and the outer end cover are gas-communicated with the motor body, so that the isolation and ventilation structure isolates the motor body and at the same time gas-communicate with the outside, so as to dissipate the heat of the motor body.

Description of drawings

Fig. 1 is a schematic diagram of a brushless motor application block diagram according to a first preferred embodiment of the present invention.

FIG. 2 is a perspective view of a brushless motor according to the above-mentioned preferred embodiment of the present invention.

Fig. 3 is a longitudinal sectional view of the above preferred embodiment according to the present invention.

Fig. 4 is a transverse sectional view according to the above preferred embodiment of the present invention.

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

Fig. 6 is an air flow guide diagram of the isolated ventilation structure according to the above-mentioned preferred embodiment of the present invention.

Fig. 7 is the lower nesting frame and the lower end cover of the isolated ventilation structure according to the above-mentioned preferred embodiment of the present invention.

Fig. 8 is the upper nesting frame and the upper end cover of the isolation ventilation structure according to the above-mentioned preferred embodiment of the present invention.

Fig. 9 is a schematic diagram of the deformation mode of the rotor according to the above-mentioned preferred embodiment of the present invention.

10A to 10L are schematic diagrams of electric tools according to the application of the brushless motor of the above-mentioned preferred embodiment of the present invention.

Fig. 11 is a partial perspective view of a brushless motor according to a second preferred embodiment of the present invention.

Fig. 12 is an exploded schematic view of a brushless motor according to a second preferred embodiment of the present invention.

13A and 13B are perspective views from different angles of the first nest frame and the first end cover of the brushless motor according to the second preferred embodiment of the present invention.

14A and 14B are perspective views of the second end cover and the second nesting frame of the brushless motor according to the second preferred embodiment of the present invention from different angles.

15A and 15B are perspective views of the second end cover and the fan of the brushless motor according to the second preferred embodiment of the present invention from different angles.

detailed description

The following description serves to disclose the present invention to enable those skilled in the art to carry out the present invention. The preferred embodiments described below are only examples, and those skilled in the art can devise 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 without departing from the spirit and scope of the present invention.

Those skilled in the art should understand that in the disclosure of the present invention, the terms "vertical", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention and The above terms should not be construed as limiting the present invention because the description is simplified rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation.

As shown in FIG. 1 to FIG. 8 , it is a brushless motor 100 according to a preferred embodiment of the present invention. 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 directly flow through the motor body 100. 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 Among them, it can be applied to different electric tools 200, such as but not limited to electric drills, electric grinders, electric hammers, electric angle grinders, electric hammers, impact electric drills, concrete vibrators, electric planers, electric picks, etc.

Referring to FIGS. 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, so as to convert electrical energy into kinetic energy.

The stator 11 includes a stator main body 111 and at least one coil 112. The coil 112 is attached to the stator main body 111 so as to generate a magnetic field when the coil 112 is working. Rotate under the action of electromagnetic force of 112.

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

Further, the stator main body 111 includes a plurality of winding monomers 1114, each of the winding monomers 1114 is integrally connected externally to form a plurality of spaced winding grooves 1112 and a plurality of winding openings 1113, so as to accommodate The coil 112 can complete the winding process through the winding opening 1113 . The winding slot 1112 communicates with the rotor channel 1111 through the winding opening 1113 . In the process of manufacturing the stator 11, the coil 112 passes through the winding opening 1113 from the rotor 12 to the winding groove 1112, so as to wind around the winding body to form a multi-strand coil 112. More specifically, in one embodiment, the stator main body 111 includes six winding monomers 1114 arranged symmetrically at intervals, and correspondingly, the stator 11 includes six coils 112 respectively surrounding the corresponding The winding unit 1114 is wound.

In one embodiment, the stator main body 111 may be formed by lamination of stamped and formed silicon steel sheets, while in other embodiments, the stator main body 111 may be formed in other ways, those skilled in the art should It is understood that the manufacturing manner of the stator body 111 is not a limitation of the present invention.

The rotor 12 includes a rotating shaft 121 and magnets 122 coaxially installed 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 with it, thereby output kinetic energy.

In one embodiment, the magnet 122 includes a reinforcement piece 1221 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 as to embed the reinforcing sheet 1221 into each of the embedded channels 1222 to enhance the magnetism of the magnet 122 . In this embodiment, the reinforcement is a square piece, and the embedded channel 1222 is a square channel corresponding to the shape of the reinforcement piece 1221 . In other embodiments, the reinforcing sheet 1221 and the embedded channel 1222 may be in other shapes, such as strips and prisms. Of course, in another embodiment, the reinforcing sheet 1221 and the embedded channel 1222 may not be provided. Inline channel 1222 described above. Those skilled in the art should understand that the structures of the reinforcing sheet 1221 and the embedded channel 1222 are not limitations of the present invention.

In an embodiment, the rotor 12 may further include a transmission wheel, which is installed on the rotating shaft 121 so as to output kinetic energy through the transmission wheel.

Further, referring to Fig. 1 to Fig. 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 main body 111 but grounded. 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 The second nesting frames 23 are butted against each other.

It is worth mentioning that the first nesting frame 21 and the second nesting frame 23 are arranged oppositely, and when the first nesting frame 21 and the second nesting frame 23 are completely docked, the The stator body 111 is well isolated, but it will be appreciated that the first nesting frame and the second nesting frame are not limited to full docking. In other words, there may be a gap between the first nesting frame and the second nesting frame, and the distance between the first nesting frame and the second nesting frame is not a limitation of the present invention .

The first nesting frame 21 has a first central channel 211 corresponding to the rotor channel 1111 of the stator main body 111, and the rotor 12 passes through the first central channel 211. Correspondingly, the second nesting frame 23 has a second central channel 231 corresponding to the rotor channel 1111 of the stator main body 111, and the rotor 12 passes through the first Second central channel 231. In other words, the first central channel 211 of the first nesting frame 21 and the second nesting frame 23 can be grounded to form a central channel consistent with the rotor channel 1111 of the stator main body 111 , so that the rotor 12 passes through.

The first nesting frame 21 includes a plurality of first nesting monomers 212, the structure of the first nesting monomers 212 matches the structure of the upper part of the winding monomer 1114 of the stator main body 111, In order to sleeve the first nesting unit 212 on the corresponding upper part of the winding unit 1114 of the stator main body 111 .

The second nesting frame 23 includes a plurality of second nesting monomers 232, the structure of the second nesting monomers 232 matches the structure of the lower part of the winding monomer 1114 of the stator main body 111, In order to sleeve the second nesting unit 232 on the corresponding lower part of the winding unit 1114 of the stator main body 111 .

In one embodiment, the first nested unit 212 and the second nested unit 232 have the same height, that is, the first nested unit 212 and the second nested unit The bodies 232 each occupy half of the winding monomer 1114 , and are butted in half. That is to say, the height ratio of the first nested monomer 212 and the second nested monomer 232 is 1:1. In another implementation 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 first nested monomer 212 and the second nested monomer The height ratios of the nested cells 232 are 3:7, 4:6 and so on. Those skilled in the art should understand that the height ratio of the first nested monomer 212 and the second nested monomer 232 is not a limitation of the present invention.

The number of the first nested monomer 212 and the second nested monomer 232 corresponds to the number of the winding monomers 1114 of the stator 11, so as to facilitate passing through the first nested monomer 212 The stator body 111 is integrally isolated from the second nested unit 232 . The first nesting unit 212 and the second nesting unit 232 are insulating materials so as to isolate the stator main body 111 in an insulating manner. It is worth mentioning that, in traditional brushless motors, the isolation coil is usually insulated by setting an insulating sheet, but in the present invention, the first nested monomer 212 and the second nested monomer 232 to achieve the insulation effect, without the need to set additional insulating sheets for insulation.

In other words, the first nested monomer 212 and the second nested monomer 232 insulate the coil 112 from the stator body 111 , and the coil 112 overlaps around the stator body 111 winding. The number of the first nested monomers 212 and the number of the second nested monomers 232 correspond to the number of the winding monomers 1114 of the stator main body 111, so as to form all the predetermined number of coils 112 Described motor body 10.

In one embodiment, the first nesting frame 21 includes six first nesting units 212, the position of each first nesting unit 212 and the winding wire of the stator main body 111 Monomer 1114 corresponds. The second nesting frame 23 includes six second nesting units 232 , and the position of each second nesting unit 232 corresponds to the winding unit 1114 of the main body of the stator 11 .

The first nesting frame 21 includes a first connecting ring 213, and each of the first nesting monomers 212 is connected to the first connecting ring 213 by extending from the first connecting ring 213 to one side at intervals. .

The first nesting unit 212 has a first nesting channel 2121 adapted to accommodate the upper part of the first winding unit 1114 of the stator body 111 so that the first nesting frame 21 is inserted into Nested in the main body of the stator 11 .

The first nesting unit 212 includes two first extension walls 2122 , and the two first extension walls 2122 are oppositely arranged to form the first nesting channel 2121 . The first nesting unit 212 includes a first bridging top 2123, the first bridging top 2123 is connected between the two first extension walls 2122, when the first nesting unit 212 is inserted When the stator main body 111 is used, the winding body 1114 of the stator main 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 nesting channel 2121 with a predetermined length.

Adjacent to the first nesting unit 212 and a first connecting wall 215 form a first insulating channel 216 , the shape of the first insulating channel 216 matches the shape of the first winding groove 1112 , so that the first nested unit 212 is plugged into the main body of the stator 11 .

In other words, the first extension wall 2122 adjacent to the first nesting unit 212 is integrally connected with the first connecting wall 215 to form a tubular first insulating passage 216, so as to facilitate When the winding unit 1114 of the stator main body 111 is inserted into the nesting unit, the tube wall of the tubular first insulating passage 216, that is, the first extension wall 2122 and the first The connecting wall 215 is inserted into the winding slot 1112 of the stator main body 111 .

The first nesting frame 21 has a plurality of first inlets 214 , and the first inlets 214 communicate with the first central channel 211 and the first insulating channel 216 . In particular, the shape of the first inlet 214 is consistent with that of the winding opening 1113 . During the process of manufacturing the motor body 10 , the coil 112 can be wound into the insulating channel through the central channel and the first inlet 214 , and wound around the first nested monomer 212 .

Further, the first nesting unit 212 includes two first outer ribs 2124, and each of the first outer ribs 2124 is bent and extended from one side of the first extension wall 2122, partially covering the surrounding trunking 1112.

Further, the two first outer ribs 2124 adjacent to the first nested unit 212 form the first inlet 214 .

The isolation ventilation structure 20 includes a plurality of isolation sheets 26, each of the isolation sheets 26 is suitable for covering the first inlet 214, and isolating the central channel and the insulating channel from each other to prevent the central channel from debris into the insulation channel. More specifically, the spacer 26 is an insulating spacer.

Further, each of the outer first outer ribs 2124 has a stepped structure, and the stepped structure adjacent to the first outer rib 2124 forms a slot-shaped first inlet 214, so that the spacer 26 plugged into the first inlet 214 .

Similarly, the second nesting frame 23 includes a second connecting ring 233, and each of the second nesting monomers 232 is connected to the second connecting ring 233 to one side at intervals. Connect ring 233 .

The second nesting unit 232 has a second nesting channel 2321 suitable for receiving the lower part of the single winding body 1114 of the stator 11 so that the second nesting frame 23 is inserted and nested in the The stator main body 111 .

The second nesting unit 232 includes two second extension walls 2322 , and the two second extension walls 2322 are oppositely arranged to form the second nesting channel 2321 . The second nesting unit 232 includes a second bridging top 2323, the second bridging top 2323 is connected between the two second extension walls 2322, when the second nesting unit 232 is inserted When the stator main body 111 is used, the winding unit 1114 of the stator main 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 bent and connected to form the second nesting channel 2321 with a predetermined length.

A second insulating channel 236 is formed adjacent to the second nesting unit 232 and a second connecting wall 235 , and the shape of the second insulating channel 236 matches the shape of the second winding slot 1112 , so that the second nested unit 232 is plugged into the stator main body 111 .

In other words, the second extension wall 2322 adjacent to the second nesting unit 232 is integrally connected with the second connecting wall 235 to form a tubular second insulating passage 236, so as to facilitate When the winding unit 1114 of the stator main body 111 is inserted into the second nesting unit 232 , the tube wall of the tubular second insulating channel 236 , that is, the second extension wall 2322 and the The second connecting wall 235 is inserted into the winding slot 1112 of the main body of the stator 11 .

The second nesting frame 23 includes a plurality of second inlets 234, and the second inlets 234 communicate with the second central channel 231 and the insulation channel. In particular, the shape of the second inlet 234 is consistent with that of the winding port 1113 . During the process of manufacturing the motor body 10 , the coil 112 can be wound into the second insulating channel 236 through the central channel and the second inlet 234 , and wound around the second nesting unit 232 .

Further, the second nesting unit 232 includes two second outer ribs 2324, and each second outer rib 2324 bends and extends from one side of the second extension wall 2322 to partially cover the surrounding trunking 1112.

Further, the two second outer ribs 2324 adjacent to the second nesting unit 232 form the second inlet 234 .

Each of the spacers 26 is suitable for covering the second entrance 234, isolating the second central channel 231 and the second insulating channel 236 from each other, so as to prevent foreign matter in the second central channel 231 from entering The second insulating channel 236 . More specifically, the spacer 26 blocks the corresponding first inlet 214 and the second inlet 234 at the same time, part of which is blocked by the first inlet 214, and the other part is blocked by the second inlet 234, so that Both the first inlet 214 and the second inlet 234 and the winding opening 1113 of the stator body 111 are covered.

Further, each of the outer second outer ribs 2324 has a stepped structure, and the stepped structure adjacent to the second outer rib 2324 forms a slot-shaped second inlet 234, so that the spacer 26 plugged into the second inlet 234 . That is to say, one of the first inlet 214 and one of the second inlet 234 correspond to each other, and the spacer 26 is inserted through the first inlet 214 and the second inlet 234, so that the first inlet 214 and the second entrance 234 are simultaneously blocked.

It is worth mentioning that, in this embodiment of the present invention, the first nesting frame 21 and the second nesting frame 23 are made by integral molding, so that each nesting unit 212, 232 And the connecting rings 213, 223 may have a predetermined size and layout, and the structural shapes of the nesting monomers 212, 232 and the connecting rings 213, 223 are controlled by a mold. In particular, the first nesting frame 21 and the second nesting frame 23 are integrally formed by insulating materials. In other words, each of the nested cells 212, 232 and the connecting ring 213, 223 are integrally connected. Certainly, in other embodiments of the present invention, the nesting monomers 212, 232 may be connected to the connecting rings 213, 223 by bonding, and are not limited to integrally formed connections.

The isolation ventilation structure 20 includes a first end cover 22 and a second end cover 24, the first end cover 22 is connected to the first nesting frame 21, and the second end cover 24 is connected to the The second nesting frame 23 . Two ends of the stator main body 111 are isolated from the outside by the first end cover 22 and the second end cover 24 respectively.

The dust-proof ventilation mechanism 20 includes at least one ventilation pipe 25 , the ventilation pipe 25 passes through the winding slot 1112 of the stator main body 111 , and separates the adjacent coils 112 . In other words, when the air flow passes through the ventilation pipe 25 , it passes through the winding slot 1112 of the stator main body 111 and the coil 112 in the winding slot 1112 at the same time. According to this embodiment of the present invention, the ventilation pipe 25 is made of heat-conducting material, the coil 112 is accommodated in the winding groove 1112, the ventilation pipe 25 is arranged with the coil 112, and when the air flow passes through the ventilation pipe At 25 o'clock, it flows through the coil 112 at the same time, and flows through the coil 112 at intervals by the ventilation pipe 25, so that the air flow will not directly contact the coil 112, so that the impurities in the air flow will not contact the coil 112. The coil 112, and through the heat exchange of the ventilation pipe 25, the heat generated on the coil 112 is taken away by the airflow. It is worth mentioning that the ventilation pipe 25 is an insulated heat pipe, so it can be arranged between the coils 112 and can perform good heat exchange with the coils 112 .

Further, the first end cover 22 has a first through hole 221 for the shaft 121 of the rotor 12 to pass through. That is to say, during the process of assembling the brushless motor 100, the rotor 12 can be inserted into the passage of the rotor 12, and then the first end cover 22 can be inserted to cover the first nesting frame 21, and The rotating shaft 121 of the rotor 12 passes through the first through hole 221 . In particular, the first through hole 221 is an extension hole, that is to say, it extends outward for a predetermined length from the first end cover 22, so that the wall of the extension hole can be more shielded from the rotating shaft 121, Prevent dust and impurities around the rotating shaft 121 from entering the passage of the rotor 12 .

The second end cover 24 has a second through hole 241 for the rotor 12 to pass through. In other words, the second through hole 241 is compatible with the rotor channel 1111 of the stator main body 111 and the first central channel 211 of the first nesting frame 21 and the second nesting frame 23 The second central channel 231 is corresponding to both of which are used for the passage of the rotor 12 . That is to say, in the process of assembling the brushless motor 100, the second end cover 24 can be connected to the second nesting frame 23 first, and then the rotor 12 can be inserted into the rotor 12. aisle. Of course, in other embodiments of the present invention, the through hole of the second end cap 24 may have a smaller size, for example but not limited to the same size as the first end cap 22 and the first through hole 221 , for the shaft 121 to pass through. Correspondingly, during the assembly process, the rotor 12 can be inserted into the first rotor channel 1111 first, and then the first end cover 22 and the second end cover 24 are respectively inserted from both ends of the rotating shaft 121. Connected to the first nesting frame 21 and the second nesting frame 23.

In particular, the second through hole 241 can be an extension hole, and the second end cover 24 extends outwards by a predetermined length, so that the wall of the extension hole can be more shielded from the rotation shaft 121, preventing the rotation shaft from Dust and impurities around 121 enter the rotor 12 passage.

The first end cover 22 has at least one first ventilation hole 222, the second end cover 24 has at least one second ventilation hole 242, and the first ventilation hole 222 and the second ventilation hole 242 communicate with the The ventilation pipe 25 is used to form an air flow passage. That is to say, 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 with the ventilation pipe 25, pass through Another ventilation hole, such as the second ventilation hole 242 or the first ventilation hole 222 , forms a continuous airflow loop.

Further, the shape of the first ventilation hole 222 and the second ventilation hole 242 matches the nozzle shape of the ventilation pipe 25, so that the airflow will not flow from the ventilation pipe 25 and the ventilation hole 222, 242 connected positions flow out. The way of connecting the ventilation pipe 25 and the ventilation holes 222 , 242 is for example but not limited to inserting the ventilation pipe 25 into the ventilation holes 222 , 242 . The positions and numbers of the first ventilation hole 222 and the second ventilation hole 242 and the ventilation pipe 25 correspond to each other, for example but not limited to, the first ventilation hole 222 and the second ventilation hole 242 The quantity is 2, 3, 4, 5, 6 and more than 6, preferably 6.

Further, the positions of the first ventilation hole 222 and the second ventilation hole 242 are related to the first insulation channel 216 of the first nesting frame 21 and the second insulation channel 216 of the second nesting frame 23. The insulating channels 236 correspond to each other. When the coil 112 is wound around the insulating channels 216, 236, the ventilation pipe 25 passes through the gap between adjacent coils 112 and communicates with the first ventilation hole 222 and the second ventilation hole 222. Two ventilation holes 242 , so that the heat generated by the coil 112 can be taken away by heat exchange when the air flow flows through the ventilation pipe 25 .

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 plugged into the second ventilation hole respectively. The ventilation hole 222 and the second ventilation hole 242 . In particular, the cross section of the ventilation pipe 25 is a trapezoidal structure, that is to say, the ventilation pipe 25 is a cylindrical structure with a trapezoidal cross section. Correspondingly, the cross-sectional shape of the first ventilation hole 222 and the second ventilation hole 242 is a trapezoidal structure.

More specifically, the ventilation pipe 25 has an inner side 251 and an outer side 252 , the inner side 251 is narrower, and the outer side 252 is wider, thereby forming the cross-sectional trapezoidal structure. The inner surface 251 is opposite to the winding opening 1113. In particular, the inner surface 251 and the winding opening 1113 have the same size, so as to cover the winding opening 1113 and block the Dust and impurities enter the insulating channel. The second outer side 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 make full use of the gap space between the coils 112 in the insulation channels 216, 236 while shielding the inner winding opening 1113, increasing the insulation. The gas flow in the passages 216, 236 flows through the ventilation pipe 25 instead of directly contacting the coil 112 to prevent impurities or dust from accumulating in the coil 112 .

The first nesting unit 212 of the first nesting frame 21 includes a first top rib 2125, and the first top rib 2125 extends outward from the first bridging top 2123 to the The first end cover 22 is used to isolate the gap between the first nesting unit 212 and the first end cover 22 . Correspondingly, the second nesting unit 232 of the second nesting frame 23 includes a second top rib 2325 , and the second top rib 2325 extends outward from the second bridging top 2323 to the second end cap 24 so as to isolate the gap between the second nesting unit 232 and the second end cap 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 end cover 22 and the second end cover 24 .

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 end cap 22 . In particular, when the first end cap 22 is inserted into the first nesting frame 21, it is limited in the limiting groove 2131, where the first end cap 22 and the first connecting ring 213 meet. highly consistent.

Further, the first connecting ring 213 includes a plurality of locking protrusions 2132 protruding inwardly of the first connecting ring 213 . Correspondingly, the first end cover 22 has a plurality of locking openings 223, and the locking openings 223 are arranged on the edge of the first end cover 22, and are suitable for being locked to the first connecting ring 213. The locking protrusion 2132 is used to determine the relative positions of the first end cover 22 and the first nesting frame 21 . The numbers of the locking protrusions 2132 and the locking openings 223 can be set according to requirements. The numbers of the locking protrusions 2132 and the locking openings 223 are not limited to 2, 3, 4 or more than 4, for example. The location layout of the locking protrusions 2132 and the locking openings 223 can be distributed at equal intervals, or can be 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.

Referring to FIG. 3 to FIG. 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 that of the first end cover 22 , so that the stacked arrangement of the circuit board 30 is suitable for the first end cover 22 . Further, the circuit board 30 has a central hole 31 corresponding to the first through hole 221 of the first end cover 22 .

The circuit board 30 has at least one ventilation hole 32 for the ventilation pipe 25 to ventilate. That is to say, one end of the ventilation pipe 25 is mounted on the ventilation hole 32 of the circuit board 30 , so that the ventilation pipe 25 can communicate with the outside.

According to the present invention, the brushless motor 100 can be applied to an electric tool 200, for example, during the working process, the circuit board 30 can collect the position signal of the rotor 12, and transmit the collected signal to the The control circuit board of the electric tool 200 drives and controls the operation of the electric tool 200 through the brushless motor 100 .

It is worth mentioning that the working environment of electric tools is generally relatively harsh, such as the environment usually contains a large amount of dust, iron filings and other impurities, and these are not suitable for the work of traditional brushless motors. According to the present invention, the isolated ventilation The structure is combined with the brushless motor, so that impurities in the environment can be isolated, so that the brushless motor has better heat dissipation performance, so that the brushless motor can support relatively high-power electric tools, so that the brushless motor can be applied to The harsher working environment expands the scope of application.

The electric tool 200 is exemplified but not limited to metal cutting electric tools, sand grinding electric tools, assembly electric tools, forestry electric tools, farming and animal husbandry electric tools, gardening electric tools, construction road electric tools, mine Power tools and other types of power tools. More specifically, but not limited to, electric reamers, magnetic base 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 machine, band saw, pipe saw machine, miter cutting machine, miter cutting combination saw, electric drill, disc sander, pendulum sander, lathe electric grinder, bench grinder, straight disc Type sander, vertical disc grinder, reciprocating sander, polishing machine, mold electric grinder, circular motion sander or polisher without irregular track, angle grinder, polisher, valve seat Electric grinder, grinder, belt sander, electric wrench, constant torque electric wrench, self-tapping screwdriver, screwdriver, riveting gun, constant torque screwdriver, rivet nut riveting gun, nailing machine, wallboard screwdriver, expansion tube machine, woodworking band saw, electric planer, electric plug, woodworking multi-tool, pruning machine, branch breaker, woodworking scraper, woodworking lathe, woodworking slotting machine, electric chain saw, thickness planer, trimming machine, curve saw , electric wood milling, woodworking sharpening machine, woodworking nailing machine, radial arm saw, plane planer, woodworking bevel cutting machine, electric circular saw, wood drill, grass shears, scissor-type grass shears, pruning shears, lawn trimmers , lawn trimmers, lawn sanders, mulch mowers, walk-controlled lawn mowers, rotary lawn mowers, flail mowers, suspended lawn mowers, hand-held garden chip blowers , Hand-held gardening blower and suction machine, Hand-held gardening chip suction machine, Drum mower, Lawn scarifier, Hammer drill, Floor polishing machine, Electric hammer, Concrete vibrator, Stone cutting machine, Diamond saw , electric pick, tamping machine, diamond drill, impact electric drill, riveting bolt wrench, hybrid grinder, plug-in concrete vibrator, sleeper electric pick, steel bar cutting machine, slotting machine, floor sanding machine, threading machine , Attached concrete vibrator, pipe bender, plastic electric welding torch, heat gun, cloth cutting machine, household water pump, air pump, hair dryer, pipe cleaning machine, coiling machine, strapping machine, plaster shears, engraving machine, waxing machine, Jacks, reciprocating engraving machines, descaling machines, electric spray guns, pool cleaners, paper shredders, plaster saws, carpet shears, sternum saws, cleaning machines, branch suction machines, dental drills, bone drills.

In some embodiments of the present invention, referring to FIG. 10A to FIG. 10L, the brushless motor 100 is applied to different power tools, such as electric drills, electric hammers, electric picks, angle grinders, electric circular saws, aluminum saws, Profile cutting machine, rhinestone, electric chain saw, stone cutting machine, angle polishing machine, flat sanding machine, wall sanding machine, belt sanding machine, marble slotting machine, electric wrench, curve saw and other power tools.

Referring to FIG. 10A, the brushless motor 100 is applied to an angle grinder 200A, which is suitable for cutting, grinding and brushing metal and stone.

Referring to FIG. 10B , the brushless motor 100 is applied to an electric wrench 200B, and the electric wrench 200B is powered by the brushless motor for tightening high-strength bolts.

Referring to FIG. 10C , the brushless motor 100 is applied to an electric hammer 200C, and the electric hammer 200C is driven by the brushless motor for drilling holes in concrete, floors, brick walls and stones.

Referring to FIG. 10D , the brushless motor 100 is applied to an aluminum sawing machine 200D, and the aluminum sawing machine 200D is powered by the brushless motor for cutting various aluminum materials.

Referring to FIG. 10E, the brushless motor 100 is applied to an angle polishing machine 200E, and the angle polishing machine 200E is powered by the brushless motor 100 to perform material surface friction and remove paint surface pollution and oxide layer. , shallow marks.

Referring to FIG. 10F , the brushless motor 100 is applied to an electric circular saw 200F, and the electric circular saw 200F is powered by the brushless motor for sawing.

Referring to FIG. 10G , the brushless motor 100 is applied to a water drill 200G, and the water drill 200G works underwater to drill holes on rocks or cement with the power of the brushless motor 100 .

Referring to Fig. 10H, the brushless motor 100 is applied to a profile cutting machine 200H, and the profile cutting machine 200H can use the brushless motor 100 as the power to process metal square flat tubes, square flat steel, I-beam, channel steel, Equipment for cutting carbon element steel, element pipe and other materials.

Referring to FIG. 10I , the brushless motor 100 is applied to an electric chain saw 200I, and the electric chain saw 200I is powered by the brushless motor 100 to saw metal or stone.

Referring to FIG. 10J , the brushless motor 100 is applied to a stone cutting machine 200J, and the brushless motor is used as power to cut stones.

Referring to Fig. 10K, the brushless motor 100 is applied to a slotting machine 200K, and the slotting machine 200K uses the brushless motor 100 as the power to perform slotting operations in the treatment of asphalt and cement pavement cracks and diseases

Referring to FIG. 10L , the brushless motor 100 is applied to a jigsaw 200L, and the jigsaw 200L is powered by the brushless motor 100 to cut metal and non-ferrous metals.

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

Referring to FIG. 5 to FIG. 7 , the first end cap 22 has at least one first threading hole 224 for the passage of wires. More specifically, the end of the coil 112 is led out through the first threading hole 224 so as to be electrically connected to the control circuit board 30 . In one embodiment, the first threading hole 224 is disposed on the edge of the first end cover 22 and communicated with the outside, so as to facilitate the extraction 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 may be disposed at other positions, such as near the inner side and not communicated with the outer side. The number and position of the first threading holes 224 can be set as required, for example but not limited to two or three, and an arrangement of more than three at equal intervals. Preferably, the number of the first threading holes 224 is three and arranged at equal intervals. Those skilled in the art should understand that the number, position and shape of the first threading holes 224 are not limitations of the present invention.

The first end cover 22 has at least one induction slot 225 for the components on the circuit board 30 to sense the rotation phase of the rotor 12 . It is worth mentioning that the induction groove 225 is recessed inward from the surface of the first end cover 22, thereby reducing the thickness of the space between the circuit board 30 and the rotor 12, so that the circuit board 30 The induction of components is more sensitive and accurate. More specifically, the first end cap 22 has a plurality of induction slots 225 arranged around the first through hole 221 of the first end cap 22 . The number of the induction slot 225 can be one or more than one, preferably, the number of the induction slot 225 is six.

According to this embodiment of the present invention, the second connecting ring 233 of the second nesting frame 23 includes a plurality of plug connectors 2331 extending to one side of the connecting ring. Correspondingly, the second end cover 24 has a plurality of insertion holes 234 for inserting the insertion piece 2331 of the second connecting ring 233 of the second nesting frame 23, so as to facilitate the The relative positions of the nest frame and the second end cover 24 are determined. In other words, the positions and numbers of the insertion holes 234 of the second end cover 24 correspond to the insertion pieces 2331 of the second connecting ring 233 of the second nesting frame 23 . For example but not limited to, the number of the socket 2331 and the socket hole 234 is one or more, preferably, the number of the socket 2331 and the socket hole 234 is 6, and Arranged at equal intervals. In particular, the position of the socket 2331 may correspond to the middle position of the connecting wall, and the position of the socket hole 234 may correspond to the position of the second vent 242 of the second end cover 24. correspond.

It is worth mentioning that, in an embodiment of the present invention, the first end cap 22 and the second end cap 24 are manufactured by integral molding, such as integral molding by injection molding, and have insulation performance.

Referring to Fig. 9, it 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 rotor 12 includes a rotating shaft 121 and a magnet 122. The magnet 122 is coaxially installed on the rotating shaft 121. When the magnet 122 is under the action of electromagnetic force When rotating, the rotating shaft 121 rotates with it, thereby outputting kinetic energy.

In one embodiment, the magnet 122 includes a reinforcement piece 1221 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 adjacently. In other embodiments, the reinforcing sheet 1221 can be in other shapes, such as strips. Of course, in another embodiment, the reinforcing sheet 1221 may not be provided or it may be the same as the embedded reinforcing sheet in the above embodiment. 1221 combined. Those skilled in the art should understand that the arrangement of the reinforcing sheet 1221 is not a limitation of the present invention.

According to this embodiment of the present invention, the brushless motor 100 includes an outer casing 40, and the motor body 10 is disposed inside the outer casing 40 so as to isolate the motor body 10 from the outside. Furthermore, the stator main body 111 is fixed to the outer casing 40 . That is to say, the outer casing 40 provides an installation location for the stator main body 111 .

The brushless motor also includes a fan 50 for increasing the air flow into the brushless motor and improving the heat dissipation efficiency of the brushless motor. Further, the fan 50 is located outside the second end cover 24 so as to increase the air flow inflow from the direction of the second end cover 24 and improve 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

Further, the isolation ventilation structure 20 includes a first end cover matching part 27 and a second end cover matching part 28 . The first end cover fitting 27 is arranged in cooperation with the first end cover 22 to isolate the rotor 12 and prevent impurities from reaching the rotor 12 .

As shown in Fig. 11 to Fig. 15B, it is a brushless motor according to the second preferred embodiment of the present invention. Different from the above-mentioned 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 in the In the limited space of the ventilation pipe 25, the heat dissipation efficiency of the brushless motor 100A is increased to adapt to a higher power brushless motor, and at the same time, the coil and the circuit are isolated to a certain extent through the isolation ventilation structure 20A. plate 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 cooperate with a fan.

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

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

12 to 13B, the brushless motor 100A includes a circuit board 30A, the isolation ventilation structure 20A includes a first outer cover 29A, the circuit board 30A is located between the first end cover 22A and the second Between one outer end cover 29A, so that the circuit board 30A is covered by the first outer end cover 29A, and impurities in the airflow are prevented from reaching the circuit board 30A. In other words, the first end cap 22A provides a mounting location for the circuit board 30A, and the first outer end cap 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 sensor elements. The accumulation of magazines on these electronic components will affect the work of the circuit board, and it is easy to accumulate heat, and the The circuit board 30A needs to prevent external touch damage, and according to this embodiment of the present invention, the circuit board 30A is arranged between the first end cover 22A and the first outer end cover 29A, through the The first end cover 22A provides the installation position of the circuit board 30A, and the circuit board is blocked by the first outer end cover 29A to isolate dust and protect the circuit board 30A from unnecessary external impact. touch.

Further, referring 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 end cover 24A, so as to increase The air circulation of the brushless motor 100A. In this embodiment of the present invention, the structure of the first outer end cover 29A and the fan 50A cooperates so that the airflow flowing with the fan does not directly enter the motor body 10, but passes through the second end The cover 24A buffers and then reaches the motor body 10 , so that the impurities in the airflow flowing with the fan will not directly reach the motor body 10 and be blocked by the second end cover 24A.

Specifically, according to this embodiment of the present invention, the first nesting frame 21A and the second nesting frame 23A can be grounded and nested in the stator main body 111 . In other words, the first nesting frame 21A and the second nesting frame 23A can be respectively inserted into the stator body 111 from both sides of the stator body 111 until the first nesting frame 21A and the The second nesting frames 23A are butted against each other. It can be understood that the first nesting frame 21A and the second nesting frame 23A are not limited to complete docking.

13A, 13B, the first nesting frame 21A has a first central channel 211A, the first central channel 211A corresponds to the rotor channel 1111 of the stator main body 111, and the rotor 12 passes through The first central channel 211A. Correspondingly, the second nesting frame 23A has a second central passage 231A, the second central passage 231A corresponds to the rotor passage 1111 of the stator main body 111 , and the rotor 12 passes through the second central passage 231A. Two central channels 231A. In other words, the first central channel 211A of the first nesting frame 21A and the second nesting frame 23A can be grounded to form a central channel consistent with the rotor channel 1111 of the stator main body 111 , so that the rotor 12 passes through.

The first nesting frame 21A includes a plurality of first nesting monomers 212A, the structure of the first nesting monomers 212A matches the structure of the upper part of the winding monomer 1114 of the stator main body 111 , In order to sleeve the first nesting unit 212A on the corresponding upper part of the winding unit 1114 of the stator main body 111 .

14A, 14B, the second nesting frame 23A includes a plurality of second nesting monomers 232A, the structure of the second nesting monomers 232A and the winding monomers 1114 of the stator main body 111 The structure of the lower part is matched so that the second nesting unit 232A is sleeved on the lower part of the corresponding winding unit 1114 of the stator main body 111 .

In one embodiment, the first nested unit 212A and the second nested unit 232A have the same height, that is, the first nested unit 212A and the second nested unit The bodies 232A each account for half of the winding monomer 1114 and are butted in half. That is to say, the height ratio of the first nested monomer 212 and the second nested monomer 232A is 1:1. In another implementation 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 first nested monomer 212A and the second nested monomer The height ratios of nested cells 232A are 3:7, 4:6, etc. Those skilled in the art should understand that the height ratio of the first nested monomer 212A and the second nested monomer 232A is not a limitation of the present invention.

The number of the first nested monomer 212A and the second nested monomer 232A corresponds to the number of the winding monomers 1114 of the stator 11, so as to facilitate passing through the first nested monomer 212A The stator main body 111 is integrally isolated from the second nested monomer 232A. The first nesting unit 212A and the second nesting unit 232A are insulating materials so as to isolate the stator main body 111 in an insulating manner. It is worth mentioning that, in traditional brushless motors, insulating sheets are usually used to insulate and isolate coils, but in the present invention, the first nested monomer 212A and the second nested monomer 232A to achieve insulation, without the need to set additional insulating sheet for insulation.

In other words, the first nested monomer 212A and the second nested monomer 232A insulatingly separate the coil 112 from the stator body 111 , and the coil 112 overlaps around the stator body 111 winding. 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 main body 111, so as to form all the predetermined number of coils 112 Described motor body 10.

In one embodiment, the first nesting frame 21A includes six first nesting units 212A, the position of each first nesting unit 212A and the winding of the stator main body 111 Monomer 1114 corresponds. The second nesting frame 23A includes six second nesting units 232A, and the position of each second nesting unit 232A corresponds to the winding unit 1114 of the main body of the stator 11 .

13A, 13B, the first nesting frame 21A includes a first connecting ring 213A, and each of the first nesting monomers 212A is spaced from the first connecting ring 213A to one side and connected to the Describe the first connecting ring 213A.

The first nesting unit 212A has a first nesting channel 2121A adapted to receive the upper part of the first winding unit 1114 of the stator body 111 so that the first nesting frame 21A is inserted into Nested in the stator main body 111 .

The first nesting unit 212A includes two first extension walls 2122A, and the two first extension walls 2122A are oppositely arranged to form the first nesting channel 2121A. The first nesting unit 212A includes a first bridging top 2123A, and the first bridging top 2123A is connected between the two first extension walls 2122A. When the first nesting unit 212A is inserted into When the stator main body 111 is used, the winding body 1114 of the stator main 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 nesting channel 2121A with a predetermined length.

Adjacent to the first nesting unit 212A and the first connecting wall 215A form a first insulating channel 216A, the shape of the first insulating channel 216A matches the shape of the first winding groove 1112 , so that the first nested unit 212A is plugged into the main body of the stator 11 .

In other words, the first extension wall 2122A adjacent to the first nesting unit 212A is integrally connected with the first connecting wall 215A to form a tubular first insulating passage 216A, so as to facilitate When the winding unit 1114 of the stator main body 111 is inserted into the nesting unit, the tube wall of the tubular first insulating channel 216A, that is, the first extension wall 2122A and the first The connecting wall 215A is inserted into the winding slot 1112 of the stator main body 111 .

The first nesting frame 21A has a plurality of first inlets 214A, and the first inlets 214A communicate with the first central channel 211A and the first insulating channel 216A. In particular, the shape of the first inlet 214A is consistent with that of the winding opening 1113 . During the process of manufacturing the motor body 10 , the coil 112 can be wound into the insulating channel through the central channel and the first inlet 214A, and wound around the first nested single body 212A.

Further, the first nesting unit 212A includes two first outer ribs 2124A, and each of the first outer ribs 2124A bends and extends from one side of the first extension wall 2122A, partially covering the surrounding trunking 1112.

Further, the two first outer ribs 2124A adjacent to the first nested unit 212A form the first inlet 214A.

The isolation ventilation structure 20A includes a plurality of isolation sheets 26A, each of the isolation sheets 26A is suitable for covering the first inlet 214A, and isolating the central channels 211A, 231A and the insulating channels 216A, 236A from each other, so as to Impurities in the central channel are prevented from entering the insulating channel. More specifically, the spacer 26 is an insulating spacer.

Further, each of the outer first outer ribs 2124A has a stepped structure, and the stepped structure adjacent to the first outer rib 2124A forms a slot-shaped first inlet 214A, so that the spacer 26A plugged into the first inlet 214A.

Similarly, referring to FIGS. 14A and 14B , the second nesting frame 23A includes a second connecting ring 233A, and each of the second nesting monomers 232A is connected at intervals extending from the second connecting ring 233A to one side. on the second connecting ring 233A.

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

The second nesting unit 232A includes two second extension walls 2322A, and the two second extension walls 2322A are oppositely arranged to form the second nesting channel 2321A. The second nesting unit 232A includes a second bridging top 2323A, and the second bridging top 2323A is connected between the two second extension walls 2322A. When the second nesting unit 232A is inserted into When the stator main body 111 is used, the winding unit 1114 of the stator main 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 nesting channel 2321A with a predetermined length.

A second insulating channel 236A is formed adjacent to the second nesting unit 232A and a second connecting wall 235A, and the shape of the second insulating channel 236A matches the shape of the second winding groove 1112 , so that the second nested unit 232A is plugged into the stator main body 111 .

In other words, the second extension wall 2322A adjacent to the second nesting unit 232A is integrally connected with the second connecting wall 235A to form a tubular second insulating passage 236A, so as to facilitate When the winding unit 1114 of the stator main body 111 is inserted into the second nesting unit 232A, the tube wall of the tubular second insulating channel 236A, that is, the second extension wall 2322A and the The second connecting wall 235A is inserted into the winding slot 1112 of the stator main body 111 .

The second nesting frame 23A includes a plurality of second inlets 234A, and the second inlets 234A communicate with the second central channel 231A and the second insulating channel 236A. In particular, the shape of the second inlet 234 is consistent with that of the winding port 1113 . During the process of manufacturing the motor body 10 , the coil 112 can be wound into the second insulating channel 236A through the central channel and the second inlet 234A, and wound around the second nesting unit 232A.

Further, the second nesting unit 232A includes two second outer ribs 2324A, and each of the second outer ribs 2324A bends and extends from one side of the second extension wall 2322A, partially covering the surrounding trunking 1112.

Further, the two second outer ribs 2324A adjacent to the second nesting unit 232A form the second inlet 234A.

Each of the spacers 26A is suitable for covering the second entrance 234A, isolating the second central channel 231A and the second insulating channel 236A from each other, so as to prevent impurities in the second central channel 231A from entering The second insulating channel 236A. More specifically, the spacer 26A blocks the corresponding first inlet 214A and the second inlet 234A at the same time, partially shields the first inlet 214A, and partially shields the second inlet 234A, so that Both the first inlet 214A and the second inlet 234A and the winding opening 1113 of the stator body 111 are covered.

Further, each of the outer second outer ribs 2324A has a stepped structure, and the stepped structure adjacent to the second outer rib 2324A forms a slot-shaped second inlet 234A, so that the spacer 26A plugged into the second inlet 234A. That is to say, one of the first inlets 214A and one of the second inlets 234A correspond to each other, and the spacer 26A is inserted through the first inlet 214A and the second inlet 234A, so that the first inlet 214A and the second entrance 234A are simultaneously blocked.

It is worth mentioning that, in this embodiment of the present invention, the first nesting frame 21A and the second nesting frame 23A are integrally formed, so that each nesting unit 212A , 232A and the connecting rings 213A, 223A may have a predetermined size and layout, and the structural shapes of the nesting monomers 212A, 232A and the connecting rings 213A, 223A are controlled by molds. In particular, the first nesting frame 21A and the second nesting frame 23A are integrally formed by insulating materials. In other words, each of the nested cells 212A, 232A and the connecting rings 213A, 223A are integrally connected. Certainly, in other embodiments of the present invention, the nesting monomers 212A, 232A may be connected to the connecting rings 213A, 223A by bonding, and are not limited to integrally formed connections.

Further, the first 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 to say, during the process of assembling the brushless motor 100, the rotor 12 can be inserted into the passage of the rotor 12, and then the first end cover 22A can be inserted to cover the first nesting frame 21A, and The rotating shaft 121 of the rotor 12 passes through the first through hole 221A. In particular, the first through hole 221A is an extension hole, that is, it extends outwards from the first end cover 22 by a predetermined length, so that the wall of the extension hole can be more shielded from the rotating shaft 121 , Prevent dust and impurities around the rotating shaft 121 from entering the passage of the rotor 12 .

The second end cover 24A has a second through hole 241A for the rotor 12 to pass through. In other words, the second through hole 241A is compatible with the rotor passage 1111 of the stator main body 111 and the first central passage 211A of the first nesting frame 21A and the second nesting frame 23A. The second central channel 231A corresponds to the passage of the rotor 12 . That is to say, in the process of assembling the brushless motor 100A, the second end cover 24A can be connected to the second nesting frame 23A first, and then the rotor 12 can be inserted into the rotor 12 aisle. Of course, in other embodiments of the present utility model, the through hole of the second end cap 24A may have a smaller size, for example but not limited to the size of the first end cap 22A and the first through hole 221A. Consistent, for the shaft 121 to pass through. Correspondingly, during the assembly process, the rotor 12 can be inserted into the first rotor channel 1111 first, and then the first end cover 22A and the second end cover 24A are respectively inserted from both ends of the rotating shaft 121. Connected to the first nesting frame 21A and the second nesting frame 23A.

In particular, the second through hole 241A can be an extension hole, and the second end cap 24A extends outwards by a predetermined length, so that the wall of the extension hole can cover the shaft 121 more, preventing the shaft from Dust and impurities around 121 enter the rotor 12 passage.

The first end cover 22A has at least one first ventilation hole 222A, the second end cover 24A has at least one second ventilation hole 242A, and the first ventilation hole 222A and the second ventilation hole 242A communicate with the The insulating channel 216A is used to form an air flow path. That is to say, the external air flow can flow into the insulating passage 216A through one of the first ventilation holes 222A, such as the first ventilation hole 222A or the second ventilation hole 242A, and flow with the insulation passage 216A. Then, it flows out through another ventilation hole, such as the second ventilation hole 242A or the first ventilation hole 222A, forming a continuous airflow loop.

Further, the positions of the first ventilation hole 222A and the second ventilation hole 242A are consistent with the first insulation channel 216A of the first nesting frame 21A and the second insulation channel 216A of the second nesting frame 23A. Corresponding to the insulating channel 236A, when the coil 112 is wound around the insulating channel 216A, 236A, the air flow passes through the gap between the adjacent coils 112 and communicates with the first ventilation hole 222A and the second ventilation hole 222A. holes 242A, so that the heat generated by the coil 112 can be taken away by heat exchange when the air flow flows through the insulating channel 216A.

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 end cover 22A and the second end cover 24A The second ventilation hole 242A does not need to cooperate with the ventilation pipe. The first ventilation hole 222A and the second ventilation hole 224A of the first end cover 22A can cooperate with the insulation channel 216A, and the first ventilation hole 222A and the second ventilation hole 224A of the first end cover 22A can cooperate with the insulation channel 216A. The shape, quantity, and layout position of the second ventilation hole 242A of the second end cover 24A can be set according to the position and shape of the insulation channel. Those skilled in the art should understand that the present invention in this aspect Not limited.

The first nesting unit 212A of the first nesting frame 21A includes a first top rib 2125A, and the first top rib 2125A extends outward from the first bridging top 2123A to the The first end cap 22A is used to isolate the gap between the first nesting unit 212A and the first end cap 22A. Correspondingly, the second nesting unit 232A of the second nesting frame 23A includes a second top rib 2325A, and the second top rib 2325A extends outward from the second bridging top 2323A. to the second end cap 24A, so as to isolate the gap between the second nesting unit 232A and the second end cap 24A.

According to this embodiment of the present invention, the first connecting ring 213A has a limiting groove 2131A surrounding the first connecting ring 213A for limiting the first end cap 22A. In particular, when the first end cap 22A is inserted into the first nesting frame 21A, it is limited in the limiting groove 2131A, where the first end cap 22A and the first connecting ring 213A meet. highly consistent.

Further, the first connecting ring 213A includes a plurality of locking protrusions 2132A protruding inwardly of the first connecting ring 213A. Correspondingly, the first end cover 22A has a plurality of locking openings 223A, and the locking openings 223A are arranged on the edge of the first end cover 22A, and are suitable for being locked to the first connecting ring 213A. The locking protrusion 2132A is used to determine the relative position of the first end cover 22A and the first nesting frame 21A. The numbers of the locking protrusions 2132A and the locking openings 223A can be set according to requirements. The numbers of the locking protrusions 2132A and the locking openings 223A are not limited to 2, 3, 4 or more than 4, for example. The location layout of the locking protrusions 2132A and the locking openings 223A can be distributed at equal intervals, or can be 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.

Referring to FIG. 12 to FIG. 13B , the first end cap 22A has at least one first threading hole 224A for passage of wires. More specifically, the end of the coil 112 is led out through the first threading hole 224A, so as to be electrically connected to the control circuit board 30A. In one embodiment, the first threading hole 224A is disposed on the edge of the first end cover 22A and communicated with the outside, so as to facilitate the extraction 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 may be disposed at other positions, such as near the inner side and not connected to the outer side. The number and position of the first threading holes 224A can be set as required, for example but not limited to two or three, and an arrangement of more than three at equal intervals. Preferably, the number of the first threading holes 224A is three and arranged at equal intervals. Those skilled in the art should understand that the number, position and shape of the first threading holes 224A are not limitations of the present invention.

The first end cover 22A has at least one induction slot, and the induction slot is used for the components on the circuit board 30A to sense the rotational phase of the rotor 12 . It is worth mentioning that the induction groove is recessed inwardly from the surface of the first end cover 22A, thereby reducing the thickness of the space between the circuit board 30A and the rotor 12, so that the components on the circuit board 30A The induction is more sensitive and accurate. More specifically, the first end cap 22A has a plurality of induction slots arranged around the first through hole 221 of the first end cap 22A. The number of the induction slots can be one or more than one.

According to this embodiment of the present invention, the second connecting ring 233A of the second nesting frame 23A includes a plurality of plug connectors 2331A extending to one side of the connecting ring. Correspondingly, the second end cover 24A has a plurality of insertion holes 234A for inserting the insertion piece 2331A of the second connecting ring 233A of the second nesting frame 23A, so as to facilitate the The relative positions of the second nesting frame 23A and the second end cover 24A are determined. In other words, the position and number of the insertion holes 234A of the second end cover 24A correspond to the insertion pieces 2331A of the second connecting ring 233A of the second nesting frame 23A. For example but not limited to, the number of the socket 2331A and the socket hole 234A is one or more, preferably, the number of the socket 2331A and the socket hole 234A is 6, and Arranged at equal intervals. In particular, the position of the socket 2331A may correspond to the middle position of the connecting wall, and the position of the socket hole 234 may correspond to the position of the second vent 242A of the second end cover 24A. correspond.

It is worth mentioning that, in an embodiment of the present invention, the first end cap 22A and the second end cap 24A are manufactured by integral molding, such as integral molding by injection molding, and have insulation performance.

Referring to FIG. 12 to FIG. 13B , the first end cover 22A has a first insertion slot 226A for limiting the first top rib 2125A of each of the first nesting frames 21A. In other words, when the first 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.

The first end cover 22A has a first engaging groove 227A for engaging the circuit board 30 and the first outer end cover 29A. That is to say, the first outer end cover 29A and the circuit board 30A are laminated and clamped to the first end cover 22A.

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 end cap 22A reaches into the first central channel 211A of the nesting frame 21A.

The circuit board 30A has at least one ventilation hole 32A for ventilation. The ventilation hole 32A communicates with the insulation channel. In this embodiment, the ventilation hole of the circuit board does not need to cooperate with the ventilation tube, but only needs to be connected to the insulating channel 216A, so that the gas in the insulating channel 216A can flow to the outside, so as to facilitate dissipation. The heat of the motor body 10.

The first outer end cover 29A has at least one first outer ventilation hole 292A, which communicates with the ventilation hole 32A of the circuit board 30A and the outside. That is to say, the first outer ventilation hole of the first outer end cover communicates with the first insulating channel 216A of the first nesting frame.

Further, according to this embodiment, the circuit board 30A includes at least one limiting post 33A for limiting the first outer end cover 29A. Correspondingly, 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 on the circuit board 30A.

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

Further, referring to FIGS. 14A to 15B , according to this embodiment of the present invention, the second end cover 24A has a second insertion slot 246A for limiting the second top of the second nesting frame 23A. The rib 2325A, so that the second end cover 24A is fixed to the second nesting frame 23A.

The second end cover 24A has a guiding groove 247A for guiding air flow. That is to say, when the fan 50 rotates externally with the rotating shaft 121 of the rotor 12, the airflow is guided by the guide groove 247A of the second end cover 224A and flows instead of directly entering the rotating shaft 121 of the rotor 12. The second ventilation hole 242A of the second end cover 24A is closed to block dust and impurities. In other words, the fan slot 247A of the second end cover 24A has the function of guiding airflow and blocking impurities.

Correspondingly, referring to FIGS. 15A and 15B , the fan 50A includes a protruding ridge 51A extending in the guide groove 247A so as to guide the air flow into the guide groove 247A.

Further, the isolation ventilation structure 20A includes a first end cover matching part 27 and a second end cover matching part 28 . The first end cover fitting 27 is arranged in cooperation with the first end cover 22 to isolate the rotor 12 and prevent impurities from reaching the rotor 12 .

Similarly, the brushless motor may further include an outer casing 40 , and the motor body 10 is fixed to the outer casing 40 .

It should be understood by those skilled in the art that the embodiments of the present invention shown in the foregoing description and drawings are only examples and do not limit the present invention. The objects of the present invention have been fully and effectively accomplished. The function and structural principles of the present invention have been shown and described in the embodiments, and the embodiments of the present invention can have any deformation or modification without departing from the principles.

Claims (34)

1. A brushless motor, characterized in that it comprises: a motor body; and - isolated ventilation structure; The motor body includes a stator and a rotor; The stator includes a stator main body and at least one coil, the coil is attached to the stator main body; the stator main body includes at least one rotor channel, and the rotor is magnetically rotatable arranged in the stator channel, when the When the coil is working, the rotor rotates under the action of electromagnetic force; The isolation ventilation structure is nested in the stator main body to isolate the coil, and the air flow passes through the stator through the ventilation structure, so that the air flow does not directly contact the coil of the stator, so that the The brushless motor described above is suitable for an electric tool. 2. The brushless motor according to claim 1, wherein the isolation ventilation structure includes two nesting frames, two end covers and a plurality of ventilation pipes, and the nesting frames can be grounded and nested in the stator body, Each of the end covers is respectively covered on each of the nesting frames, the ventilation pipe passes through the stator main body, and the gas is connected to the two end covers, so that the external air flow can circulate in isolation from the interior of the stator main body. 3. The brushless motor according to claim 2, wherein the stator body comprises a plurality of winding monomers, the two nesting frames comprise a plurality of nesting monomers, the nesting monomers and the nesting The shape of the sleeve monomer is matched, and the nesting monomer is nested in the winding monomer. 4. The brushless motor according to claim 2, wherein the two nesting frames can be nested in the stator main body but are grounded. 5. The brushless motor according to claim 3, wherein each of said nesting frames has a plurality of said nesting channels, which are suitable for inserting said winding monomers, so that said nesting and plug-in grounding nesting on the stator body. 6. The brushless motor according to claim 5, wherein each of the nested monomers comprises two extension walls and a bridging top, and the two extending walls are arranged oppositely on both sides of the bridging top to form the The nesting channel is used to insert the winding monomer, and the winding monomer is limited to the jumper top. 7. The brushless motor according to claim 3, wherein the nesting frame comprises a plurality of connection walls, and the connection walls connect the extension walls of the adjacent nesting cells to form an insulating channel, so The coil is accommodated in the insulating channel. 8. The brushless motor according to claim 7, wherein the stator main body has a plurality of winding slots, which are formed at intervals by the winding monomer, and the insulation channel tube wall is accommodated in the winding groove. 9. The brushless motor according to claim 3, wherein the stator main body has a plurality of winding slots, which are formed at intervals by the winding monomer, and the coil is wound around the winding frame in an insulating manner by the nesting frame. The winding monomer. 10. The brushless motor according to claim 7, wherein the stator main body has a plurality of winding openings, the winding openings communicate with the rotor channel, each of the nesting frames has a plurality of inlets, the inlets and The winding mouth matches. 11. The brushless motor according to claim 10, wherein the isolation ventilation structure comprises a plurality of isolation sheets, the isolation sheets cover the inlet, and isolate the insulation channel from the rotor channel. 12. The brushless motor according to claim 11, wherein the nested unit comprises two outer ribs, each of which extends in a bent manner along one side of the extension wall to partially cover the insulating channel , two outer ribs adjacent to the nesting unit form the inlet. 13. The brushless motor according to claim 12, wherein the spacer is plugged into the inlet. 14. The brushless motor according to claim 3, wherein the nesting frame includes a connecting ring, each of the nesting monomers is connected to one side of the connecting ring according to a predetermined layout, so as to fix each of the Nested monoliths. 15 . The brushless motor according to claim 12 , wherein the connecting ring has a limiting groove surrounding the inner side of the connecting ring, and the end cover is limited in the limiting groove. 16. The brushless motor according to claim 12, wherein the connecting ring has a plurality of locking protrusions, the end cover has a plurality of locking openings, and the locking protrusions are located in the locking openings , to fix the relative position of the nesting frame and the end cover. 17. The brushless motor according to claim 12, wherein the connecting ring has a plurality of inserts extending to one side along the connecting ring, the end cover has a plurality of inserting holes, the inserting A piece is inserted into the insertion hole to fix the relative position of the end cover and the nesting frame. 18. The brushless motor according to claim 1, wherein the brushless motor comprises a circuit board, the isolation and ventilation structure comprises one or two nested frames, two end covers and an outer end cover, and the two nested The frame is oppositely nested in the stator main body, each of the end covers is respectively covered by the nesting frame, and the circuit board is arranged between one of the end covers and the outer end cover. 19. The brushless motor according to claim 18, wherein one of the end covers has an insertion slot suitable for inserting into the nesting frame, so as to fix the end cover to the nesting frame. 20. The brushless motor according to claim 19, wherein one of the end covers has a locking groove, which is suitable for locking the circuit board and the outer end cover. 21. The brushless motor according to claim 20, wherein each of the circuit board and the outer end cover has at least one ventilation hole communicating with the motor body. 22. The brushless motor according to claim 21, wherein the circuit board includes at least one limiting post, the outer end cover has at least one limiting hole, and the limiting post is adapted to pass through the limiting hole, Therefore, the circuit board and the outer end cover are limited. 23. The brushless motor according to any one of claims 2 to 22, wherein the end cover has a through hole for the rotor to pass through, and the through hole is an extended hole. 24. The brushless motor according to any one of claims 2 to 22, wherein the end cover has a through hole for a rotating shaft of the rotor to pass through, and the through hole is an extended hole. 25. The brushless motor according to any one of claims 2 to 22, wherein the end cover has a ventilation hole, and the ventilation pipe is connected to the ventilation hole in gas communication. 26. The brushless motor according to any one of claims 2 to 22, wherein the end cover has at least one threading hole through which the end of the coil wire passes. 27. The brushless motor according to any one of claims 2 to 17, wherein the brushless motor comprises a circuit board, and the circuit is overlapped on the end cover. 28. The brushless motor according to claim 27, wherein the end cover has a plurality of induction slots, and the induction slots are recessed inwardly from the surface of the end cover, reducing the size of the circuit board and the inside of the motor body. interval thickness. 29. The brushless motor according to any one of claims 2 to 17, wherein the section of the ventilation pipe is a trapezoidal structure, which increases the air flow of the ventilation pipe. 30. The brushless motor according to any one of claims 2 to 22, wherein the nest frame is integrally formed by injection molding. 31. The brushless motor according to any one of claims 2 to 22, wherein each component of the isolation and ventilation structure is an insulating and heat-conducting material. 32. The brushless motor according to any one of claims 2 to 22, wherein the rotor includes a magnet and a shaft, the magnet is coaxially mounted on the shaft, the magnet includes a plurality of reinforcing pieces, The reinforcing sheet is embedded in the magnet to enhance the magnetism of the magnet. 33. The brushless motor according to any one of claims 2 to 22, wherein the rotor includes a magnet and a shaft, the magnet is coaxially mounted on the shaft, the magnet includes a plurality of reinforcing pieces, The reinforcement sheet is attached to the outer surface of the magnet to enhance the magnetism of the magnet. 34. The brushless motor according to any one of claims 2 to 22, wherein one of the end covers has at least one guide groove, which cooperates with a fan of the brushless motor to guide the air flow under the fan.