CN113141081B

CN113141081B - Brushless DC motor with built-in controller

Info

Publication number: CN113141081B
Application number: CN202110442528.4A
Authority: CN
Inventors: 项乐宏; 赵宏江; 鲍达
Original assignee: Zhejiang Lege Intelligent Drive Technology Co ltd
Current assignee: Zhejiang Lege Intelligent Drive Technology Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2022-06-24
Anticipated expiration: 2041-04-23
Also published as: CN113141081A

Abstract

The invention discloses a controller panel, which comprises a circular Hall plate arranged in a first controller housing and a rectangular controller panel arranged in a second controller housing; the annular Hall plate is radially clamped and axially limited at the outer end part of the circular first insulating framework, and the first controller housing is fastened with the iron core and the end cover through a plurality of screw rods; the two sides of the top of the first controller cover shell are respectively provided with a first convex column with a threaded hole and extending vertically, the inner surface of the top plate of the second controller cover shell is provided with a second convex column which corresponds to the first convex column in position and is provided with a through hole and extends vertically, the end surfaces of the first convex column and the second convex column are respectively provided with a step for embedding the rectangular controller panel, two sides of the rectangular controller panel are provided with notches which are limited radially with the convex columns, and two screws penetrate through the respective through holes to be screwed in the respective threaded holes to compress the rectangular controller panel. The radial area of the controller panel and the motor is reduced, the controller panel is fastened stably and reliably, and the heat dissipation effect of the controller is good.

Description

Brushless DC motor with built-in controller

Technical Field

The invention relates to the technical field of motors, in particular to a brushless direct current motor with a built-in controller.

Background

Brushless dc motors are referred to as brushless motors for short. In recent years, with the technology becoming mature and perfect, brushless motors have been widely used in fields such as aeromodelling, medical equipment, household appliances, office automation, and the like.

Early brushless DC motor's controller is all external, and the space that occupies is great, and material costs such as pencil are higher relatively. In recent years, a built-in controller of a brushless direct current motor is gradually popularized, and compared with an external controller, the requirement on spatial layout of the built-in controller or the named controller is relatively low, partial wiring harness and other materials and components are reduced, and the production cost of a product is relatively reduced. The brushless direct current motor in the prior art comprises a stator, a rotor which is rotationally matched in the stator, and an output shaft arranged at one end of the rotor, wherein the stator generally comprises an iron core, an insulating framework fixed in the iron core and a plurality of groups of coils formed by winding enameled wires on the insulating framework.

However, the brushless dc motor with a built-in controller in the prior art still has the following disadvantages: the controller is a large-diameter circular annular plate, the radial occupied area is large, the radial area of the motor is large, and the occupied equipment space is large after the motor is installed. All control components are in a cavity, and the heat dissipation effect is not good. The controller needs to be directly fastened by a plurality of screws, stability and reliability are not enough, and the working area of a controller panel is occupied more. In addition, coils of the brushless direct current motor in the prior art are insulated and fixed with the insulating framework by adopting binding tapes and binding wires and then curing glue, the binding and glue curing processes are complicated, the production period of each motor is relatively long, the labor cost is relatively high, the material cost of the binding wires and the glue is relatively high, the production efficiency is relatively low, the reject ratio of the stator is relatively high, and the automatic assembly is difficult, namely the automatic production is difficult.

Disclosure of Invention

The invention aims to solve the technical problem of providing a brushless direct current motor with a built-in controller, which greatly reduces the radial area of a controller panel, further reduces the radial area of the motor, ensures that the controller panel is stably and reliably fastened and has good heat dissipation effect of the controller.

The invention provides a brushless direct current motor with a built-in controller, which comprises a controller housing, a controller, an end cover and a stator, wherein the stator comprises an iron core, an insulating framework fixed in the iron core and a plurality of groups of coils formed by winding enameled wires on the insulating framework; the annular Hall plate is radially clamped and axially limited at the outer end part of the circular first insulating framework, and the first controller housing is fastened with the iron core and the end cover through a plurality of screw rods; the two sides of the top of the first controller cover shell are respectively provided with a first convex column with a threaded hole and extending vertically, the inner surface of the top plate of the second controller cover shell is provided with a second convex column which corresponds to the first convex column in position and is provided with a through hole and extends vertically, the end surfaces of the first convex column and the second convex column are respectively provided with a step for embedding the rectangular controller panel, two sides of the rectangular controller panel are provided with notches which are limited radially with the convex columns, and two screws penetrate through the respective through holes to be screwed in the respective threaded holes to compress the rectangular controller panel.

After adopting the structure, the brushless direct current motor with the built-in controller has the following advantages: the controller adopts a circular Hall plate arranged in a first controller housing and a rectangular controller panel arranged in a second controller housing, the Hall plate can also be called a circular controller panel, after a large controller panel is divided into two small control panels, the radial area of each controller panel is greatly reduced as 1/3-1/2, the radial occupied area is greatly reduced, the radial area of a motor is also greatly reduced, and the space occupied by the motor after the motor is installed is relatively reduced. The Hall plate and the rectangular controller panel are respectively arranged in two different cavities, so that the heat dissipation effect of components of the controller is greatly improved, and the heat dissipation effect is good. The circular Hall plate is radially clamped and axially limited at the top of the circular insulating framework, the rectangular controller panel is axially compressed and radially limited through two pairs of convex columns, the rectangular controller panel is directly fastened without screws, the structure is compact, the fastening is stable, reliable and firm, the installation area of controller components is increased, namely, the working area of the controller panel is increased, the utilization rate of the controller panel is improved, larger spaces are reserved on the upper surface and the lower surface of the rectangular controller panel and the circular controller panel, the components of the rectangular controller panel have enough extension spaces on the upper surface and the lower surface, the components of the circular controller panel have enough extension spaces on the upper surface and the lower surface, the installation and operation are convenient, the production efficiency is improved, and a good heat dissipation effect is further ensured.

Furthermore, the brushless direct current motor with the built-in controller further comprises an annular pressing plate made of insulating materials and used for axially pressing the coils, and a plurality of inserting claws used for being clamped with the wire inlet notches at the outer end parts of the second insulating frameworks to be fixed with each other are arranged on the inner circle of the annular pressing plate. After the structure above the adoption, the annular clamp plate is fixed and is insulated to the tip that is close to the output shaft of the motor of the multiunit coil that enameled wire winding constitutes on insulating skeleton, replace ribbon wiring reuse glue solidification technology step and structure, the shortcoming of prior art has been overcome, stator assembling process is simple, and is swift, the production cycle of every stator is short, the cost of labor reduces, insulating material's clamp plate is with low costs like the plastic pressing plate, the cost is below 1/2 of the material cost of ligature line and glue like a plastic pressing plate, the equipment is production efficiency height promptly, stator and brushless motor's defective rate reduces by a wide margin, and can realize brushless motor's automated assembly is automated production promptly.

Further, an axial convex ring for axially pressing the annular pressing plate is arranged on the inner end surface of the top of the end cover. After the structure is adopted, the end parts of a plurality of groups of coils formed by winding the enameled wire on the insulating framework by the annular pressing plate are fixed and insulated better, and the quality of the brushless motor can be further improved.

Furthermore, the outer end part of the second insulating framework is provided with a claw inserting inlet; each inserted claw comprises a claw body fixed with the annular pressing plate and a claw head fixed at the free end of the claw body, the width size of the claw body is smaller than that of an inserted claw inlet at the end part of the insulating framework, and the claw head is in interference fit with the wire inlet notch. After the structure is adopted, the inserting claws of the annular pressing plate are more convenient to insert or detach with the insulating framework, and the clamping is more stable and reliable.

Furthermore, the top of the circular insulating framework is provided with a circular shelf for placing the circular Hall plate, a plurality of upward buckling columns are arranged on the circular shelf at intervals, the excircle of the circular Hall plate is provided with a plurality of radial rectangular grooves clamped with the buckling columns, and the inner side of the top end of each buckling column is provided with an arrow-type back-off for buckling the top surface of the circular Hall plate. After the structure is adopted, the radial limit, the circumferential limit and the axial limit of the annular Hall plate and the circular insulating framework are stable and reliable, and the connection is firmer.

Further, ring shape shelf top interval is equipped with a plurality of ascending radial spacing posts, and the inboard of radial spacing post is the arc, and ring shape hall plate excircle has a plurality of radial arc recesses with radial spacing post block. After the structure is adopted, the air conditioner is provided with the air inlet and the air outlet,

during installation, the radial limiting columns have a certain guiding effect, so that assembly is more convenient, radial limitation, circumferential limitation and axial limitation of the annular Hall plate and the insulating framework are further enhanced, and connection is firmer.

Further, the air conditioner is provided with a fan,

the first convex column is a first integral column consisting of a first concave column at the outer side and a first semicircular column at the inner side, a first notch of the first concave column is a first arc-shaped notch, the first arc-shaped notch of the first concave column and a first semicircular hole of the first semicircular column form a complete circular threaded hole, and the first concave column is higher than the first semicircular column to form a first step;

the notches on two sides of the rectangular controller panel are both U-shaped notches and notches formed by two L-shaped notches which are connected with the free ends of the U-shaped notches and symmetrically arranged, wherein the U-shaped notches form U-shaped through holes for screws to pass through;

the second convex column is a second integral column consisting of a second concave column on the outer side and a second semicircular column on the inner side, a second notch of the second concave column is a second arc-shaped notch, the second arc-shaped notch of the second concave column and a second semicircular hole of the second semicircular column form a complete circular through hole, and the second concave column is higher than the second semicircular column to form a second step.

After the first convex column adopts the above specific structure, the vertical support and the transverse limit of the rectangular controller panel are facilitated, and the matching with the inner surface of the second controller housing side plate and a screw is facilitated. After the rectangular controller panel adopts the above specific structure, the rectangular controller panel has better vertical fixing and transverse fixing effects with the first convex column and the second convex column. After the second convex column adopts the above specific structure, the vertical support and the transverse limit of the rectangular controller panel are facilitated, and the matching of the inner surface of the side plate of the second controller housing and a screw is facilitated.

Furthermore, the inner side surface of the side plate of the second controller housing is fixed with the outer side surface of the second convex column and is attached to the outer side surface of the first convex column, the end surface of the free end of the first concave column is abutted to the end surface of the free end of the second concave column, two L-shaped notches on each side of the rectangular controller panel are embedded on the first concave column and the second concave column, the end surface of the free end of the first semicircular column and the end surface of the free end of the second semicircular column are pressed on the rectangular controller panel, and two screws penetrate through respective U-shaped through holes and circular through holes and are screwed in respective circular threaded holes. The fastening is more stable, reliable and firm, the utilization rate of the rectangular controller panel is further improved, and the mounting process is further simplified.

Furthermore, a plurality of gaps for ventilation and heat dissipation are formed in the circular shelf of the first insulating framework; a first controller plug-in port which is also used as a ventilation and heat dissipation port is arranged at the joint of the top plate and the side plate of the first controller housing; first controller plug-in components mouth department has the ascending first rectangle plug-in box of opening, and the one end of fixing many in-line stereoplasm wires on ring shape hall plate is vertical plug-in connection, and the other end of many in-line stereoplasm wires is through wave-soldering and ring shape hall plate board welding. By adopting the structure, the heat dissipation of the annular Hall plate is ensured, and the coil of the stator below is ventilated and cooled; the electric connection is more convenient, the heat dissipation effect of the circular ring-shaped Hall plate is better, and the working stability of the controller is more facilitated.

Furthermore, a second controller plug-in port which is also used as a ventilation and heat dissipation port is arranged at the joint of a top plate and a side plate of a second controller housing, a second rectangular plug-in box with an outward opening is arranged at the second controller plug-in position, one end of a plurality of L-shaped hard wires on the second rectangular plug-in box is welded with a rectangular controller panel through wave soldering, and the other end of the plurality of L-shaped hard wires is a transverse plug-in connector; the edge of the rectangular controller panel is provided with a plurality of ventilation gaps. After adopting above structure, both made things convenient for the electricity to connect, further reduced the volume of rectangular control panel again, and guaranteed the good radiating effect of controller, more be favorable to the job stabilization nature of controller.

Furthermore, the shapes of the iron core and the end cover of the second controller housing, the first controller housing, the stator are chamfered squares, four corners of the first controller housing are provided with first through holes, the top of each first through hole is provided with a first counter bore, four corners of the iron core are provided with second through holes corresponding to the first through holes, four corners of the end cover are provided with threaded holes corresponding to the second through holes, a plurality of screw rods penetrate through the respective first through holes and the respective second through holes and are screwed in the respective threaded holes, and the large ends of the screw rods are accommodated in the first counter bores. After the structure is adopted, the radial area of the motor is further reduced, and the occupied equipment space after the motor is installed is further reduced.

Drawings

Fig. 1 is a schematic perspective view of a brushless dc motor according to the present invention.

Fig. 2 is a schematic diagram one of a portion of the exploded structure of fig. 1.

Fig. 3 is a schematic diagram of a portion of the exploded structure of fig. 1.

Fig. 4 is a schematic perspective view of the controller cover of fig. 1 with the first and second controller covers removed.

Fig. 5 is a schematic perspective view of the hall plate of fig. 4 with the circular ring removed.

Fig. 6 is a schematic side plan view of the first insulating frame in the present invention.

Fig. 7 is a perspective view of the controller cover of fig. 1 with the first and second controller covers removed.

Fig. 8 is a side plan view of the first controller cover in the present invention.

FIG. 9 is a side plan view of the rectangular controller panel of the present invention.

Fig. 10 is a side bottom view of the second controller cover of the present invention.

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

Fig. 12 is a schematic perspective view of the worm gear output mechanism of fig. 10 with the worm gear output mechanism removed.

Fig. 13 is a schematic diagram of a portion of the exploded structure of fig. 11.

Fig. 14 is a schematic view of the structure of fig. 11 with the end caps, bearings and shaft removed.

Fig. 15 is a schematic view of the structure of the annular pressure plate in the present invention.

Fig. 16 is a schematic view of a second insulating skeleton structure in the present invention.

Fig. 17 is a schematic bottom side view of the end cap of the present invention.

Shown in the figure: 1. a second controller housing, 2, a first controller housing, 3, a stator, 4, an end cover, 5, a worm and gear output mechanism, 6, a controller, 7, a radial rectangular groove, 8, an iron core, 9, a first rectangular plug box, 10, a straight hard wire, 11, a radial arc groove, 12, a first controller plug-in port, 13, a first counter bore, 14, a second rectangular plug box, 15, a second controller plug-in port, 16, a second counter bore, 17, a third through hole, 18, a rectangular controller panel, 19, a first through hole, 20, a circular Hall plate, 21, a Hall element, 22, an axial convex ring, 23, a first insulating framework, 24, a second through hole, 25, a radial limiting column, 26, a pointed reverse buckle, 27, a shelf circular ring, 28, an arc, 29, a buckle column, 30, a notch for heat dissipation, 31, a first concave column, 32, a first semicircular column, 33. the first step, 34, a first arc-shaped notch, 35, a threaded hole, 36, a first convex column, 37, an L-shaped hard lead, 38, a ventilation notch, 39, an L-shaped notch, 40, a U-shaped notch, 41, a second arc-shaped notch, 42, a second step, 43, a second concave-shaped column, 44, a circular through hole, 45, a side plate, 46, a second convex column, 47, a shaft, 48, a bearing, 49, an annular pressing plate, 50, a coil, 51, an inserting claw, 52, a second insulating framework, 53, a wire inlet notch, 54, a claw head, 55, a claw inserting inlet, 56, a claw body, 57, a process hole and heat dissipation hole, 58, a first semicircular hole, 59, a second semicircular hole, 60 and a second semicircular column.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It is to be noted that the description of the embodiments is provided to aid understanding of the present invention, and is not intended to limit the present invention. In addition, the technical features involved in the respective embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 15.

The invention discloses a brushless direct current motor with a built-in controller, which comprises a controller housing, a controller 6, an end cover 4 and a stator 3. The lower end of the end cover 4 is provided with a worm gear output mechanism 5. The stator 3 includes an iron core 8, an insulating skeleton fixed in the iron core 8, and a plurality of groups of coils 50 formed by winding an enameled wire on the insulating skeleton. The insulating skeleton includes first insulating skeleton 23 of circular shape and circular shape second insulating skeleton 52, and the inner of first insulating skeleton 23 and second insulating skeleton 52 pegs graft each other and constitutes holistic insulating skeleton.

The controller 6 includes a control panel and components (except for the hall element, other components are not shown in the drawings, and the following description is different) mounted on the control panel. The controller panel comprises a circular hall plate 20 disposed in the first controller housing 2 and a rectangular controller panel 18 disposed in the second controller housing 1. The ring-shaped hall plate 20 is radially engaged and axially limited at the outer end of the circular first insulating framework 23, and the first controller housing 2 is fastened with the iron core 8 and the end cover 4 by a plurality of screws (not shown in the figure, the same shall apply hereinafter). The first controller housing 2 has a first protruding column 36 with a threaded hole 35 and extending vertically on both sides of the top, the second controller housing 1 has a second protruding column 46 with a through hole and extending vertically corresponding to the first protruding column 36 on the inner surface of the top plate, the first protruding column 36 and the second protruding column 46 have steps for embedding the rectangular controller panel 18 on the end surface, the rectangular controller panel 18 has notches on both sides for radial spacing with the protruding column, and two screws (not shown in the figure, the same applies hereinafter) pass through the respective through holes and are screwed in the respective threaded holes 35 to compress the rectangular controller panel 18. As shown in fig. 3, the hall element 21 is fixed, for example, welded by wave soldering, on the bottom surface of the circular hall plate 20, and corresponds to the position of the magnetic ring below. The hall element 21 is also called a hall sensor.

The first controller housing 2 has a process hole and a heat radiation hole 57 at the center of the top plate. The bottom ends of the four corners of the first controller housing 2 are provided with downward extending bumps (not labeled in the figure) to form heat dissipation gaps. The above structure further contributes to heat dissipation of the controller and the motor.

The outer tip of first insulation skeleton 23 has one and shelves the ring shape shelf 27 of ring shape hall plate 20, and the interval is equipped with a plurality ofly as four ascending knot posts 29 on the ring shape shelf 27, and ring shape hall plate 20 excircle has a plurality of radial rectangle recesses 7 with detaining the block of post 29, detains the arrow point formula back-off 26 that post 29 top inboard has the ring shape hall plate 20 top surface of lock. The annular shelf 27 can also be understood as a cylindrical shelf which is provided with a plurality of notches. The radial rectangular grooves 7 may also be referred to as transverse Contraband-shaped grooves that open outward.

The top of the circular ring-shaped shelf 27 is provided with a plurality of radial limiting columns 25 at intervals, the radial limiting columns 25 are in arc shapes 28, and the outer circle of the circular ring-shaped Hall plate 20 is provided with a plurality of radial arc-shaped grooves 11 clamped with the radial limiting columns 25.

The first convex column 36 is a first integral column composed of a first concave column 31 on the outer side and a first semicircular column 32 on the inner side, the first notch of the first concave column 31 is a first arc notch 34, the first arc notch 34 of the first concave column 31 and a first semicircular hole 58 of the first semicircular column 32 form a complete circular threaded hole 35, and the first concave column 31 is higher than the first semicircular column 32 to form a first step 33.

The notches on both sides of the rectangular controller panel 18 are both a U-shaped notch 40 and notches formed by two L-shaped notches 39 which are connected with the free end of the U-shaped notch 40 and symmetrically arranged, wherein the U-shaped notch 40 forms a U-shaped through hole for a screw to pass through.

The second convex column 46 is a second integral column composed of a second concave-shaped column 43 on the outer side and a second semicircular column 60 on the inner side, a second gap of the second concave-shaped column 43 is a second arc-shaped gap 41, the second arc-shaped gap 41 of the second concave-shaped column 43 and a second semicircular hole 59 of the second semicircular column 60 form a complete circular through hole 44, and the second concave-shaped column 43 is higher than the second semicircular column 60 to form a second step 42. The first 32 and second 60 semi-circular cylinders are to be understood in a broad sense, i.e., semi-circular cylinders also include a plurality of semi-circular cylinders.

The inner side surface of the side plate 45 of the second controller housing 1 is fixed with the outer side surface of the second convex column 46 and is attached to the outer side surface of the first convex column 36, the end surface of the free end of the first concave column 31 is abutted to the end surface of the free end of the second concave column 43, and two L-shaped notches 39 on each side of the rectangular controller panel 18, such as two sides, are embedded on the first concave column 31 and the second concave column 43, and here, it can be understood that: a part of the height of the rectangular control panel 18 is fitted to the first concave pillar 31, and the other part of the height of the rectangular control panel 18 is fitted to the second concave pillar 43. The end surface of the free end of the first semi-circular column 32 and the end surface of the free end of the second semi-circular column 60 are both pressed on the rectangular controller panel 18, and two screws pass through the respective U-shaped through holes and the respective circular through holes 44 and are screwed in the respective circular threaded holes 35. It will be understood that the screws are first threaded through the respective third through holes 17 of the second controller housing 1, then threaded through the respective U-shaped through holes and the respective circular through holes 44 and screwed into the respective circular threaded holes 35, and the large ends of the screws are placed in the second counter bores 16. Two L-shaped notches 39 on each side, namely two L-shaped notches 39 on one side and two L-shaped notches 39 on the other side. Screws are also known as screws.

The annular shelf 27 of the first insulating framework 23 is provided with a plurality of notches 30 for ventilation and heat dissipation. There is first controller plug-in components mouth 12 of doubling as the ventilation cooling mouth in the combination department of 2 roofs of first controller housing and curb plate, first controller plug-in components mouth 12 department has the ascending first rectangle plug-in components box 9 of opening, first rectangle plug-in components box 9 is fixed if sticky connects on ring shape hall plate 20, the one end of many straight line stereoplasm wires 10 in the first rectangle plug-in components box 9 is through wave-soldering and the welding of ring shape hall plate 20, the other end of many straight line stereoplasm wires 10 is vertical plug-in connection.

A second controller plug-in port 15 which is also used as a ventilation and heat dissipation port is arranged at the joint of a top plate and a side plate 45 of the second controller housing 1, a second rectangular plug-in box 14 with an outward opening is arranged at the position of the second controller plug-in 15, one end of a plurality of L-shaped hard wires 37 in the second rectangular plug-in box 14 is welded with a rectangular controller panel 18 through wave soldering, and the other end of the plurality of L-shaped hard wires 37 is a transverse plug-in joint. The edge of the rectangular controller panel 18 has a plurality of vent notches 38.

The shapes of the iron core 8 and the end cover 4 of the second controller housing 1, the first controller housing 2, and the stator 3 are all chamfered squares, the four corners of the first controller housing 2 are provided with first through holes 19, the top of the first through holes 19 is provided with first counter bores 13, the four corners of the iron core 8 are provided with second through holes 24 corresponding to the first through holes 19, the four corners of the end cover 4 are provided with threaded holes (the threaded holes are not shown in the figure, the same applies hereinafter) corresponding to the second through holes 24, a plurality of screws (the screws are not shown in the figure, the same applies hereinafter) pass through the respective first through holes 19 and the respective second through holes 24 to be screwed in the respective threaded holes, and the large ends of the screws are accommodated in the first counter bores 13. The straight hard lead 10 and the L-shaped hard lead 37 described above are used for signal line leads. The above first controller card port 12 may also be referred to as a first controller card port, and the above second controller card port 15 may also be referred to as a second controller card port.

As shown in fig. 11, 12, 13, 14, 15, 16, 17.

It will be understood that the controller-incorporated brushless dc motor of the present invention further includes a rotor rotatably fitted in the stator 3, a shaft 47 connected to the rotor, and a bearing 48. The inner race of bearing 48 is fixed to the polished rod portion of shaft 47 and the outer race of bearing 48 is fixed to the inner bore of end cap 4. The shaft 47 is also referred to as a rotating shaft, and the shaft 47 is understood here as an output shaft. In fig. 11, the upper end of the end cap 4 is provided with a worm gear output mechanism 5, and the worm is arranged on a shaft 47.

The brushless direct current motor with the built-in controller further comprises an annular pressing plate 49 which is made of insulating materials and used for axially pressing a plurality of groups of coils 50, and a plurality of inserting claws 51 which are used for being clamped with wire inlet notches 53 at the outer end part of a second insulating framework 52 to be fixed mutually are arranged on the inner circle of the annular pressing plate 49. The outer end of the second insulating frame 52 has a pawl entrance 55. Each of the claws 51 includes a body 56 fixed to the annular pressure plate 49 and a head 54 fixed to a free end of the body 56, the body 56 having a width dimension smaller than that of a claw entrance 55 at an outer end portion of the second insulating frame 52, and the head 54 being in interference fit with the wire-feeding notch 53. The claw head 54 preferably has an interference fit with the inlet slot 53, i.e. the width dimension of the claw head 54 is greater than the width dimension of the inlet slot 53. It will be appreciated that to achieve interference fit of the claw head 54 with the inlet slot 53, the width of the claw head 54 is slightly larger than the width of the inlet slot 53, so that the claw head 54 can be tightened on the end of the inlet slot 53 and can be easily pulled upwards for disassembly.

A plurality of the claws 51 may be arranged uniformly along the circumference, each of the claws 51 extends in the axial direction, and the inner surface of each of the claws 51 and the inner circle of the annular presser plate 49 may be on the same circular arc surface. The other way round, that is, the inner surface of each of the claws 51 may be a circular arc surface that is on the same circle as the circular arc surface of the inner circle of the annular presser plate 49. It will be understood that the axially extending fingers extend in a perpendicular direction, i.e., the fingers 51 may be perpendicular to the lower surface of the annular pressure plate 49. Such a configuration allows for better versatility and easier and faster assembly of the annular pressure plate 49, the inner bore of the annular pressure plate 49 allowing for the passage of the bearings 48, such as rolling bearings, on the shaft 47 during installation and better fit with the rotor of the motor. The plug-in claws 51 and the annular pressure plate 49 can be formed into a whole by injection molding, so that the annular pressure plate 49 has a firmer structure and lower manufacturing cost.

The inserted claws are clamped with the wire inlet notches at the end parts of the insulating framework to be fixed with each other, and other structures can also be adopted, for example, an axial long hole is formed in the middle of the claw head, so that the claw head has radial elasticity and is tightly clamped with the wire inlet notches, and the inserted claws can be conveniently pulled upwards to be detached. An axial long hole can be formed in the middle of the claw head, and a spring or a rubber elastic block is arranged in the axial long hole, so that the axial long hole has radial elasticity and is clamped with the inlet wire notch, and the claw head can be conveniently pulled upwards for disassembly. The end part of the claw head and two side walls of the wire inlet notch can be provided with a semicircular bulge and an arc-shaped groove which are matched with each other to be clamped with each other, and the claw head can be conveniently pulled upwards to be detached.

All the outer corners of the body 56 and the head 54 may be arc-shaped, for example, the two corners of the free end of the body 56 are arc-shaped, the two corners of the free end of the head 54 are arc-shaped, the included angles of all the sides of the body 56 are arc-shaped, and the included angles of all the sides of the head 54 are arc-shaped. After the structure is adopted, the interference between the inserting claw and the insulating framework in the inserting process can be avoided, and the inserting process is more convenient and quicker. The body 56 may also be referred to as a body.

The inner end face of the top of the end cover 4 is provided with an axial convex ring 22 which axially presses the annular pressure plate 49. The bottom ends of the four corners of the end cover 4 are provided with downward extending convex blocks (not marked in the figure) to form heat dissipation gaps.

The first insulating bobbin 23 and the second insulating bobbin 52 may be plastic bobbins. The annular pressure plate 49 is made of plastic, for example.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a brushless DC motor of built-in controller, includes controller housing, controller, end cover and stator, and the stator includes the iron core, fixes the insulating skeleton in the iron core and twines the multiunit coil that constitutes on insulating skeleton by the enameled wire, and the controller includes control panel and installs the components and parts on control panel, and insulating skeleton includes circular shape first insulation skeleton and circular shape second insulation skeleton, its characterized in that: the controller panel comprises a circular Hall plate arranged in the first controller housing and a rectangular controller panel arranged in the second controller housing; the annular Hall plate is radially clamped and axially limited at the outer end part of the circular first insulating framework, and the first controller housing is fastened with the iron core and the end cover through a plurality of screw rods so as to reduce the radial area of the control panel and improve the heat dissipation effect; the two sides of the top of the first controller cover shell are respectively provided with a first convex column with a threaded hole and extending vertically, the inner surface of the top plate of the second controller cover shell is provided with a second convex column which corresponds to the first convex column in position and is provided with a through hole and extends vertically, the end surfaces of the first convex column and the second convex column are respectively provided with a step for embedding the rectangular controller panel, two sides of the rectangular controller panel are provided with notches which are limited radially with the convex columns, and two screws penetrate through the respective through holes to be screwed in the respective threaded holes to compress the rectangular controller panel.

2. The controller-embedded brushless dc motor according to claim 1, wherein: the coil clamp further comprises an annular pressing plate made of insulating materials and used for axially pressing the coils, and a plurality of inserting claws which are used for being clamped with the inlet wire notches of the outer end portion of the second insulating framework and fixed with each other are arranged on the inner circle of the annular pressing plate.

3. The controller-embedded brushless dc motor according to claim 2, wherein: an axial convex ring for axially pressing the annular pressing plate is arranged on the inner end surface of the top of the end cover.

4. The controller-embedded brushless dc motor according to claim 2, wherein: the outer end part of the second insulating framework is provided with a claw inserting inlet; each inserted claw comprises a claw body fixed with the annular pressing plate and a claw head fixed at the free end of the claw body, the width size of the claw body is smaller than that of an inserted claw inlet at the end part of the insulating framework, and the claw head is in interference fit with the wire inlet notch.

5. The controller-embedded brushless dc motor according to claim 1, wherein: the outer tip of first insulation skeleton has one to shelve the ring shape shelf of ring shape hall plate, and the interval is equipped with a plurality of ascending knot posts on the ring shape shelf, and ring shape hall plate excircle has and detains a plurality of radial rectangle recesses of post block, detains the arrow point formula back-off that post top inboard has lock ring shape hall plate top surface.

6. The controller-embedded brushless dc motor according to claim 5, wherein: the top of the circular ring-shaped shelf is provided with a plurality of upward radial limiting columns at intervals, the inner sides of the radial limiting columns are arc-shaped, and the outer circle of the circular ring-shaped Hall plate is provided with a plurality of radial arc-shaped grooves clamped with the radial limiting columns.

7. The controller-embedded brushless dc motor according to claim 6, wherein: the first convex column is a first integral column consisting of a first concave column at the outer side and a first semicircular column at the inner side, a first notch of the first concave column is a first arc-shaped notch, the first arc-shaped notch of the first concave column and a first semicircular hole of the first semicircular column form a complete circular threaded hole, and the first concave column is higher than the first semicircular column to form a first step;

8. The controller-embedded brushless dc motor according to claim 7, wherein: the inner side surface of a side plate of the second controller housing is fixed with the outer side surface of the second convex column and is attached to the outer side surface of the first convex column, the end surface of the free end of the first concave column is abutted to the end surface of the free end of the second concave column, two L-shaped notches on each side of the rectangular controller panel are embedded on the first concave column and the second concave column, the end surface of the free end of the first semicircular column and the end surface of the free end of the second semicircular column are tightly pressed on the rectangular controller panel, and two screws penetrate through respective U-shaped through holes and circular through holes and are screwed in respective circular threaded holes.

9. The controller-embedded brushless dc motor according to claim 5, wherein: a plurality of gaps for ventilation and heat dissipation are formed in the circular shelf of the first insulating framework; a first controller plug-in port which is also used as a ventilation and heat dissipation port is arranged at the joint of the top plate and the side plate of the first controller housing; the first controller plug-in connector port is provided with a first rectangular plug-in box with an upward opening, one end of each of a plurality of straight-line-shaped hard wires in the first rectangular plug-in box is welded with the circular Hall plate through wave soldering, and the other end of each of the plurality of straight-line-shaped hard wires is a vertical plug-in connector.

10. The controller-embedded brushless dc motor according to claim 1, wherein: a second controller plug-in port which is also used as a ventilation and heat dissipation port is arranged at the joint of a top plate and a side plate of a second controller housing, a second rectangular plug-in box with an outward opening is arranged at the second controller plug-in position, one end of a plurality of L-shaped hard wires on the second rectangular plug-in box is welded with a rectangular controller panel through wave soldering, and the other end of the plurality of L-shaped hard wires is a transverse plug-in connector; the edge of the rectangular controller panel is provided with a plurality of ventilation gaps.

11. The controller-embedded brushless dc motor according to claim 5, wherein: the appearance of the iron core and the end cover of the second controller housing, the first controller housing, the stator is chamfered, the four corners of the first controller housing are provided with first through holes, the top of each first through hole is provided with a first counter bore, the four corners of the iron core are provided with second through holes corresponding to the first through holes, the four corners of the end cover are provided with threaded holes corresponding to the second through holes, a plurality of screw rods penetrate through the respective first through holes and the second through holes to be screwed in the respective threaded holes, and the large ends of the screw rods are accommodated in the first counter bores.