WO2019169842A1 - 一种bldc电机 - Google Patents

一种bldc电机 Download PDF

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Publication number
WO2019169842A1
WO2019169842A1 PCT/CN2018/104246 CN2018104246W WO2019169842A1 WO 2019169842 A1 WO2019169842 A1 WO 2019169842A1 CN 2018104246 W CN2018104246 W CN 2018104246W WO 2019169842 A1 WO2019169842 A1 WO 2019169842A1
Authority
WO
WIPO (PCT)
Prior art keywords
hall
groove
hole
motor according
end cover
Prior art date
Application number
PCT/CN2018/104246
Other languages
English (en)
French (fr)
Inventor
赵远升
陈艳丽
郭烈维
Original Assignee
中山大洋电机股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201820315536.6U external-priority patent/CN208078854U/zh
Priority claimed from CN201820451256.8U external-priority patent/CN208190464U/zh
Priority claimed from CN201820721336.0U external-priority patent/CN208190439U/zh
Application filed by 中山大洋电机股份有限公司 filed Critical 中山大洋电机股份有限公司
Publication of WO2019169842A1 publication Critical patent/WO2019169842A1/zh

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines

Definitions

  • the invention relates to a BLDC motor.
  • the current BLDC motor includes a motor body and a controller, and a front end of the motor body extends from a rotating shaft, and a tail end of the motor body is connected to the controller, wherein the motor body includes a casing, a front end cover, a rear end cover, and a stator An assembly, a rotor assembly, and the rotating shaft, the front end cover and the rear end cover are respectively mounted at both ends of the casing, and the stator assembly and the rotor assembly are installed in a cavity of the casing, A magnetic ring is mounted on the rotor assembly, the stator end of the stator assembly is insulated with a Hall circuit board, and a Hall element on the Hall circuit board senses the magnetic flux of the magnetic ring.
  • This structure has the following problems: First, the end insulation is easily deformed due to the plastic material, which causes the angular deviation of the motor Hall element to be large, affecting the performance of the motor, and the Hall circuit board is inconvenient to replace.
  • a wire hole is generally installed in the casing, and a wire sheath is installed on the wire hole.
  • the motor wire leads out of the motor through the wire sheath from the wire hole.
  • the structure is complicated, the installation is troublesome, and the manufacturing cost is high.
  • the existing rotating shafts are provided with flat positions at both ends, and two circlip steps are arranged in the middle of the rotating shaft, and knurling or pressing ribs are arranged between the two circlip steps to prevent the rotating shaft from slipping when mating with the rotor core, so that
  • the problem of the structure 1.
  • the rotating shaft and the rotor core are directly in contact with each other, and when the motor rotates, current is generated and transmitted to the bearing, which causes the motor bearing to be electrically etched. 2.
  • the balance of the rotor assembly is a difficult problem; because of the flat length, the cement used for balancing the balance is more, the rotor core is affected by the space and can not be glued; , causing the motor to vibrate greatly.
  • a further object of the present invention is to provide a BLDC motor to solve the problem that the motor outlet structure of the prior art is unreasonable and the installation is troublesome.
  • a third object of the present invention is to provide a BLDC motor to solve the problem of electrical erosion of a motor bearing in the prior art.
  • a BLDC motor includes a motor body, a front end of the motor body extending from a rotating shaft, the motor body including a casing, a front end cover, a rear end cover, a stator assembly, a rotor assembly, and the rotating shaft, the front end cover and the rear End caps are respectively mounted at both ends of the casing, the stator assembly and the rotor assembly are mounted in a cavity of the casing, a magnetic ring is mounted on the rotor assembly, and the rear end cover includes a bottom plate a bearing seat projecting outward from a center of the bottom plate, and an annular boss arched at an outer edge of the bottom plate, forming an annular groove between the annular boss and the bearing housing, the concave a through hole is defined in the groove, a Hall holder is mounted in the groove, a Hall circuit board is mounted on the Hall holder, and a Hall element on the Hall circuit board extends from the through hole Inside the motor body and next to the magnetic ring.
  • the rear end cover is provided with a plurality of screw holes in the groove
  • the Hall holder is provided with a plurality of curved long holes corresponding to the screw holes, and a screw is installed through the curved long holes.
  • the Hall holder is fixed in the groove by the screw.
  • the through hole is an arc-shaped through hole located at a periphery of the bearing housing, and the bearing seat and the bottom plate are connected by three connecting blocks, and the connecting blocks extend upwardly to form reinforcing ribs, and the reinforcing A rib is coupled to the sidewall of the bearing housing, and the plurality of screw holes are located beside the connecting block.
  • the Hall holder is recessed with a fan-shaped mounting groove, and the bottom of the mounting groove protrudes downwardly with three sleeves, and the sleeve passes through the through hole to the magnetic ring, the Hall
  • the circuit board is mounted in a mounting slot into which the Hall element on the Hall circuit board is inserted.
  • the Hall holder is provided with one of the arcuate long holes on each side of the mounting groove.
  • the Hall holder protrudes upwardly from the bottom of the slot of the mounting slot with a protruding post, and the Hall circuit board is provided with a plurality of mounting holes corresponding to the protruding post, and the Hall circuit board passes the A fitting hole is fitted into the mounting groove in cooperation with the boss.
  • the groove bottom of the mounting groove further protrudes downwardly with a positioning protrusion, and the groove is concavely provided with a fan-shaped positioning groove, and the positioning protrusion is movably mounted in the fan-shaped positioning groove.
  • the tail end of the motor body is connected to the controller, and the rear end cover is further provided with an outlet hole in the groove, and the Hall holder is provided with a avoidance slot corresponding to the outlet hole, and the motor lead is The motor body extends through the outlet hole and the avoidance slot into the controller.
  • a cover cover groove is disposed outside the rear end cover, and a lead outlet is disposed at an edge of the rear cover and the cover.
  • the annular boss is provided with a plurality of radial through grooves, and the outer edge of the cover plate is provided with a plurality of arched grooves corresponding to the radial through grooves, and the arcuate grooves and the radial through grooves are combined to form the lead outlet.
  • the cover plate described above protrudes upward with a radial projection, and the bottom of the radial projection forms a lead passage, and the arcuate groove is located at an end of the lead passage.
  • the ring boss is further provided with a plurality of card holes
  • the bottom of the cover plate is provided with a plurality of buckles corresponding to the axial hole, the buckle passes through the card hole to fasten the bottom of the rear cover, and the cover passes the card The buckle is fastened to the rear end cover.
  • the bearing seat and the bottom plate are connected by three connecting blocks, the two sides of the connecting block extend upward to form a reinforcing rib, a platform is arranged between the two reinforcing ribs, and a screw hole is arranged on the platform.
  • the bottom of the cover plate protrudes from the bottom of the cover plate with a mounting post, and the mounting post is supported on the platform.
  • the through hole on the mounting post corresponds to the mounting screw hole, and the screw is screwed through the through hole to be mounted on the mounting screw hole to install the cover plate on the rear end. Covered.
  • the rotating shaft described above comprises a shaft body made of a metal material, a first flat position is arranged at an end of the shaft body, an annular groove is arranged on a middle surface of the shaft body, and a core connecting portion is formed in the middle of the annular groove, the iron core
  • An electrically insulating injection molded body is injection molded at the connecting section, the injection molded body includes a sleeve portion, the sleeve portion is sleeved outside the iron core connecting section, the sleeve portion is filled with the annular groove, and the outer surface of the sleeve portion is set to roll Flower or ribs.
  • the injection molded body described above further comprises a connecting column, the connecting portion of the iron core is provided with a positioning hole, the connecting column is located inside the cavity of the sleeve portion, and the connecting column is nested inside the positioning hole.
  • the positioning hole described above is a through hole, and both ends of the connecting post are connected to the inner side wall of the cavity.
  • the ribs described above are arranged axially.
  • the iron core connecting section described above cuts the second flat position, and the second flat position is 180 degrees out of phase with the first flat position.
  • the first flat position is provided at both ends of the shaft body, and the first flat positions at both ends are aligned in the circumferential direction.
  • the positioning hole described above is located at the second flat position, and a card slot for mounting the circlip is disposed on the shaft body at both ends of the injection molded body.
  • the invention has the following effects:
  • the Hall circuit board is mounted on the rear end cover through the Hall fixing frame, and the installation is convenient, and the rear end cover and the Hall fixing frame are not easily deformed, thereby avoiding the angular deviation of the Hall element and the sensing of the Hall circuit board.
  • the effect is more stable, and the performance of the motor is improved; the Hall element protrudes into the motor body and is located beside the magnetic ring, and the sensing effect is better;
  • the rear end cover is provided with a plurality of screw holes in the groove
  • the Hall fixing frame is provided with a plurality of curved long holes corresponding to the screw holes, and a screw is installed through the curved long hole
  • the Hall holder is fixed in the groove by the screw, and the Hall holder is conveniently installed, and the arc-shaped long hole allows the angle between the Hall holder and the rear end cover to be Adjusting, the angle between the Hall element and the magnetic ring is adjustable, and the performance of the motor is improved;
  • the through hole is an arc-shaped through hole located at a periphery of the bearing housing, and the bearing seat and the bottom plate are connected by three connecting blocks, and the connecting blocks extend upward from both sides to form a reinforcing rib.
  • the reinforcing ribs are connected to the side wall of the bearing seat, and the reinforcing ribs ensure the strength of the rear end cover;
  • the Hall holder is recessed with a fan-shaped mounting groove, and the bottom of the mounting groove protrudes downwardly with three sleeves, and the sleeve passes through the through hole to the magnetic ring, the The circuit board is mounted in the mounting slot, and the Hall element of the Hall circuit board is inserted into the sleeve, the sleeve can protect the Hall element and accurately control the position of the Hall element;
  • the groove is further provided with a wire exit hole at a periphery of the fan-shaped through hole, and the Hall holder is provided with a avoidance groove corresponding to the outlet hole, and the outlet hole and the avoidance groove are convenient for the motor lead to be led out;
  • the Hall holder protrudes from the bottom of the slot of the mounting slot with a protruding column, and the Hall circuit board has a plurality of mounting holes corresponding to the protruding post, and the Hall circuit board is installed through the mounting hole and the protruding post.
  • the Hall board is easy to install in the mounting slot.
  • the cover of the rear end cover is covered with a groove, and the end of the end cover and the cover plate is provided with a lead outlet.
  • the motor lead is fixed by the cooperation of the end cover and the cover plate, thereby saving the use of the protective cover and facilitating installation. , also reduces production costs;
  • the annular boss is provided with a plurality of radial through grooves, and the outer edge of the cover plate is provided with a plurality of arched grooves corresponding to the radial through grooves, and the arched grooves and the radial through grooves are combined to form the lead outlet, and the structure is simple.
  • the production cover is convenient; the cover plate protrudes upward with a radial protrusion, and the bottom of the radial protrusion forms a lead passage, the arc-shaped groove is located at an end of the lead passage, and the radial protrusion prevents the cover from squeezing the motor lead.
  • the appearance is more beautiful;
  • the cover plate is fixed on the rear end cover by a buckle, and the cover plate is fastened on the rear end cover, and the platform is provided with a mounting screw hole, and the bottom of the cover plate protrudes from the platform with a mounting post, and the mounting column Supported on the platform, the through hole on the mounting post corresponds to the mounting screw hole, and the screw is screwed through the through hole to be screwed on the mounting screw hole to install the cover plate on the rear end cover, which is convenient to install and reliable in connection;
  • the rotating shaft of the utility model comprises a shaft body made of a metal material, a first flat position is arranged at an end of the shaft body, an annular groove is arranged in a middle portion of the shaft body, and a core connecting portion is formed in the middle of the annular groove, the iron
  • the core connecting section defines a positioning hole, and an electrically insulated injection molded body is injection molded at the iron core connecting section to prevent the electric current from being transmitted from the rotor to the rotating shaft and the bearing when the motor rotates, thereby effectively reducing the electric bearing corrosion problem of the motor bearing;
  • the injection molded body includes a sleeve portion and a connecting column, the sleeve portion is sleeved on the outer side of the iron core connecting section, the sleeve portion is filled with the annular groove, the connecting column is located inside the cavity of the sleeve portion, and the connecting column is nested inside the positioning hole, the sleeve
  • the outer surface of the part is provided with
  • the outer diameter of the injection molded body of the electric core of the rotating shaft of the rotating shaft of the utility model is opened according to the required size, and the knurling or pressing rib is opened together with the shaft diameter, and the knurling or pressing of the injection molding is performed.
  • the position of the rib is matched with the rotor core, the process is simple, the processing efficiency is high, and the precision is easy to control.
  • the rotating shaft of the utility model is provided with a first flat position at both ends of the shaft body, and the first flat position of the two ends is turned by the aligned iron core connecting section at the angular position in the circumferential direction to cut the second flat position, the second flat The position is 180 degrees out of phase with the first flat position.
  • a card slot for mounting the circlip is provided on the shaft body at both ends of the injection molded body to facilitate axial positioning of the rotor assembly.
  • the injection molded body further comprises a connecting column, the connecting portion of the iron core is provided with a positioning hole, the connecting column is located inside the cavity of the sleeve portion, and the connecting column is nested inside the positioning hole.
  • the connection between the shaft body and the injection molded body is made stronger.
  • FIG. 1 is a schematic structural view of a BLDC motor according to Embodiment 1 of the present invention.
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1;
  • Figure 3 is an enlarged view of B of Figure 2;
  • FIG. 4 is an exploded view of a BLDC motor according to Embodiment 1 of the present invention.
  • Figure 5 is an enlarged view of a portion C of Figure 4.
  • Figure 6 is an enlarged view of the portion D of Figure 4.
  • FIG. 7 is a schematic structural view of a two-axis extension motor according to Embodiment 2 of the present invention.
  • Figure 8 is a plan view of a dual-shaft extension motor according to a second embodiment of the present invention.
  • Figure 9 is a cross-sectional view taken along line E-E of Figure 8.
  • Figure 10 is an enlarged view of F of Figure 9;
  • Figure 11 is an exploded view of the biaxial extension motor provided in the second embodiment of the present invention.
  • FIG. 12 is a schematic structural view of a cover plate of a biaxial extension motor according to Embodiment 2 of the present invention.
  • Figure 13 is a schematic view showing the structure of the cover plate according to the second embodiment of the present invention.
  • FIG. 14 is a schematic structural view of a rear end cover of a biaxial extension motor according to Embodiment 2 of the present invention.
  • Figure 15 is a schematic structural view of a two-axis extension motor according to Embodiment 3 of the present invention.
  • Figure 16 is a perspective view of the four motor shaft of the embodiment of the present invention.
  • Figure 17 is a front elevational view of the fourth motor shaft of the embodiment of the present invention.
  • Figure 18 is a cross-sectional view taken along line H-H of Figure 17;
  • Figure 19 is a perspective view of the shaft body of the fourth embodiment of the present invention.
  • Figure 20 is a front elevational view of the shaft body of the fourth embodiment of the present invention.
  • Figure 21 is a cross-sectional view taken along line K-K of Figure 20;
  • Figure 22 is a perspective view of an injection molded body of a fourth embodiment of the present invention.
  • Figure 23 is a plan view of the injection molded body of the fourth embodiment of the present invention.
  • Figure 24 is a cross-sectional view taken along line J-J of Figure 23;
  • Figure 25 is a cross-sectional view showing the assembly of the rotor assembly and the rotating shaft of the fourth embodiment of the present invention.
  • the present embodiment provides a BLDC motor including a motor body 10 and a controller 9 .
  • the front end of the motor body 10 extends from the rotating shaft 8 , and the tail end of the motor body 10 and the controller 9 is connected, wherein the motor body 10 includes a casing 4, a front end cover 5, a rear end cover 1, a stator assembly 6, a rotor assembly 7, and the rotating shaft 8, and the front end cover 5 and the rear end cover 1 are respectively mounted on
  • the stator assembly 6 and the rotor assembly 7 are mounted in a cavity of the casing 4, and the rotor assembly 7 is mounted with a magnetic ring 32, characterized in that:
  • the rear end cover 1 includes a bottom plate 11, a bearing housing 12 projecting from the center of the bottom plate 11 toward the controller 9, and an annular boss 13 arched at the outer edge of the bottom plate 11, at the annular boss
  • An annular groove 14 is formed between the bearing housing 12 and the bearing housing 12, and a through hole 15 is
  • a Hall holder 2 is mounted in the groove 14, and the Hall holder 2 is mounted.
  • the Hall circuit board 31 is mounted on the rear end cover 1 through the Hall holder 2, which is convenient to install, and the rear end cover 1 and the Hall holder 2 are not easily deformed, thereby avoiding the Hall element.
  • the 311 generates an angular deviation, which makes the sensing effect of the Hall circuit board 31 more stable and improves the performance of the motor; the Hall element 311 extends into the motor body 1 and is located beside the magnetic ring 32, and the sensing effect is better.
  • the rear end cover 1 is provided with a plurality of screw holes 16 in the recess 14 .
  • the Hall mounting bracket 2 is provided with a plurality of curved long holes 23 corresponding to the screw holes 16 , and a screw 27 is worn.
  • An over-curved long hole 23 is installed in the screw hole 16, and the Hall holder 2 is fixed in the groove 14 by the screw 27.
  • the curved long hole 23 adjusts the angle between the Hall holder 2 and the rear end cover 1 to adjust the angle between the Hall element 311 and the magnetic ring 32, thereby improving the performance of the motor.
  • the through hole 15 is an arc-shaped through hole at the periphery of the bearing housing 12, and the bearing housing 12 and the bottom plate 11 are connected by three connecting blocks 17, and the connecting blocks 17 extend upward from both sides.
  • a reinforcing rib 171 is connected to the side wall of the bearing housing 12, and the plurality of screw holes 16 are located beside the connecting block 17.
  • a bearing 75 is mounted in the bearing housing 12, and the rotating shaft 8 is supported in the casing 4 by the bearing 75.
  • the reinforcing rib 171 ensures the strength of the rear end cover 1.
  • the Hall holder 2 is recessed with a fan-shaped mounting groove 21, and the bottom of the mounting groove 21 protrudes downwardly with three sleeves 22, and the sleeve 22 passes through the through hole 15 to the magnetic ring.
  • the Hall wiring board 31 is mounted in the mounting groove 21, and the Hall element 311 on the Hall wiring board 31 is inserted into the sleeve 22.
  • the sleeve 22 protects both the Hall element 311 and the position of the Hall element 311.
  • the Hall holder 2 is provided with one of the arcuate long holes 23 on each side of the mounting groove 21.
  • the rear end cover 1 further includes an outlet hole 18 in the recess 14.
  • the Hall holder 2 and the outlet hole 18 are correspondingly provided with a avoidance slot 24, and the motor lead (not shown) is
  • the motor body 10 extends through the outlet hole 18 and the avoidance groove 24 into the controller 9.
  • the outlet hole 18 and the avoidance slot 24 facilitate the lead extraction of the motor.
  • a protrusion 25 is protruded from the bottom of the slot of the mounting slot 21, and a plurality of mounting holes 312 are defined in the Hall circuit board 31 corresponding to the protrusion 25,
  • the wiring board 31 is mounted in the mounting groove 21 by the fitting of the mounting hole 312 and the boss 25.
  • the Hall circuit board 31 is easy to install.
  • the groove bottom of the mounting groove 21 further protrudes downwardly with a positioning protrusion 26, and the groove 14 is concavely provided with a sector-shaped positioning groove 141, and the positioning protrusion 26 is movably mounted on the sector-shaped positioning groove 141.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • This embodiment is a modification based on the first embodiment.
  • the modification is to disassemble the controller 9 from the rear end cover 1, separate the controller 9 from the motor body 10, and then extend the shaft 8
  • the end cap 1 forms a biaxially extending BLDC motor. details as follows:
  • the present embodiment provides a dual-axis BLDC motor, including a casing 4, a front end cover 5, a rear end cover 1, a stator assembly 6, a rotor assembly 7, and a rotating shaft 8, and a front end cover. 5 and the rear end cover 1 are respectively installed at both ends of the casing 4 to form a cavity 40. The two ends of the rotating shaft 8 respectively protrude from the front end cover 5 and the rear end cover 1, and the stator assembly 6 and the rotor assembly 7 are mounted on the casing 4.
  • the rotor assembly 7 is provided with a magnetic ring 32, wherein the rear end cover 1 is provided with a groove 14, the bottom of the groove 14 is provided with a through hole 15, and the groove 14 is provided with a Hall fixing frame 2
  • a Hall circuit board 31 is mounted on the Hall holder 2, and a Hall element on the Hall board 31 extends from the through hole 15 to the magnetic ring 32 inside the cavity 40, and a cover is provided on the rear end cover 1
  • the plate 100 covers the recess 14, and a lead outlet 101 is provided at the edge of the rear cover 1 and the cover 100.
  • a shock absorbing ring 92 is attached to the front end cover 5 and the rear end cover 1.
  • the Hall circuit board 31 is mounted on one of the end covers (the rear end cover 1) through the Hall holder 2, which is convenient for installation and maintenance, and can avoid angular deviation of the Hall element.
  • the performance of the motor is improved; the motor lead is fixed by the cooperation of the rear end cover 1 and the cover 100, which saves the use of the protective sleeve, is convenient to install, and reduces the production cost.
  • the cover plate 100 covers the rear end cover 1.
  • the rear end cover 1 includes a bottom plate 11, a bearing seat 12 protruding from the center of the bottom plate 11 toward the cover plate 100, and an annular convex body arched at the outer edge of the bottom plate 11.
  • the groove 13 is located between the annular boss 13 and the bearing housing 12, and the annular boss 13 is provided with a plurality of radial through slots 131.
  • the outer edge of the cover plate 100 is corresponding to the radial through slot 131.
  • the arched groove 102, the arcuate groove 102 and the radial through groove 131 are combined to form the lead outlet 101, which has a simple structure and is convenient to produce.
  • the cover plate 100 protrudes upward from the radial projections 103, and the bottom of the radial projections 103 forms a lead passage 104, and the arcuate groove 102 is located at the end of the lead passage 104.
  • the radial projections 103 prevent the cover plate 100 from squeezing the motor leads and have a more aesthetic appearance.
  • the groove 14 is an annular groove.
  • the cover plate 100 and the rear end cover 1 are pressed by screws 108 on both sides of the lead outlet 101.
  • a bearing is mounted in the bearing housing 12, and the rotating shaft 8 is supported by the front end cover 5 and the rear end cover 1 through bearings. (bearing 93 removes the reference number)
  • the rear end cover 1 further includes a through hole 18 in the recess 14 , and the Hall holder 2 is provided with a avoidance groove 24 corresponding to the wire hole 18 , and the motor lead passes through the wire hole 18 .
  • the avoidance groove 24 extends into the upper of the Hall holder 2.
  • a plurality of latching holes 132 are defined in the bottom of the annular boss 13 .
  • the bottom of the cover plate 100 is corresponding to the axial latching hole 132 and is provided with a plurality of buckles 105.
  • the latching 105 passes through the latching holes 132 to fasten the rear end.
  • the cover 100 is fixed to the rear end cover 1 by a snap 105.
  • the cover plate 100 is fastened on the rear end cover 1 for easy installation.
  • the rear end cover 1 is provided with a plurality of screw holes 16 in the recess 14 .
  • the Hall mounting bracket 2 is provided with a plurality of curved long holes 23 corresponding to the screw holes 16 , and a screw passes through the curved shape.
  • the long hole 23 is installed in the screw hole 16, and the Hall holder 2 is fixed in the groove 14 by screws.
  • the curved long hole 23 adjusts the angle between the Hall holder 2 and the rear end cover 1 to adjust the angle between the Hall element and the magnetic ring 32, thereby improving the performance of the motor.
  • the bearing block 12 and the bottom plate 11 are connected by three connecting blocks 17, and the two sides of the connecting block 17 extend upward to form a reinforcing rib 171.
  • the platform 172 is disposed between the two reinforcing ribs 171.
  • the mounting post 106 is supported on the platform 172.
  • the through hole 107 of the mounting post 106 corresponds to the mounting screw hole 173, and the screw passes through.
  • the through hole 107 is screwed onto the mounting screw hole 173 to mount the cover 100 on the rear end cover 1.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • This embodiment is a modification based on the second embodiment, except that the radial projections 103 on the top of the cover plate 100 and the top of the cover plate 100 are a flat surface. details as follows:
  • the rear end cover 1 includes a bottom plate 11, a bearing housing 12 projecting from the center of the bottom plate 11 toward the cover plate 8, and an annular boss 13 arched at the outer edge of the bottom plate 11,
  • the groove 14 is located between the annular boss 13 and the bearing housing 12.
  • the annular boss 13 is provided with a plurality of radial through grooves 131. The top of the radial through groove 131 is covered by the cover plate 8 and forms the lead outlet 9.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • the present embodiment is an improvement of the rotary shaft 8, which includes a shaft body 81 made of a metal material, and a first flat position 82 at the end of the shaft body 81, at the shaft body 81.
  • An annular groove 83 is formed on the surface of the middle portion, and a core connecting portion 84 is formed in the middle of the annular groove 83.
  • the iron core connecting portion 84 is molded with an electrically insulating molded body 85.
  • the molded body 85 includes a sleeve portion 851 and a sleeve.
  • the portion 851 is tightly attached to the outside of the core connecting portion 84, and the sleeve portion 851 is filled with the annular groove 83, and the outer surface of the sleeve portion 851 is pressed 8511.
  • the ribs 8511 are axially disposed.
  • the outer surface of the sleeve portion 851 is provided with knurling.
  • the injection molded body 85 further includes a connecting post 852.
  • the core connecting portion 84 defines a positioning hole 841.
  • the connecting post 852 is located inside the cavity 850 of the sleeve portion 851, and the connecting post 852 is nested inside the positioning hole 841.
  • the positioning hole 841 described above is a through hole, and both ends of the connecting post 852 are connected to the inner side wall of the cavity 850.
  • the core connecting section 84 described above cuts the second flat position 86, and the second flat position 86 is circumferentially offset from the first flat position 82 by an angle of 180 degrees.
  • the first flat position 82 is provided at both end portions of the shaft body 81, and the first flat positions 82 at both ends are aligned in the circumferential direction.
  • the positioning hole 841 described above is located on the second flat position 86.
  • a card slot 87 for mounting a circlip is provided on the shaft body 81 at both ends of the injection molded body 85.
  • the rotor assembly 7 includes a rotor core 71 and a magnetic tile.
  • a rotor hole is disposed in the middle of the rotor core 71.
  • the rotating shaft 8 is inserted into the shaft hole, and the sleeve portion 851 is embedded in the shaft hole to the shaft body 81 and the rotor core 71. Electrical insulation.

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Abstract

本发明公开了一种BLDC电机，包括电机本体和控制器，电机本体的前端伸出转轴，电机本体的尾端与控制器连接，电机本体包括机壳、前端盖、后端盖、定子组件、转子组件和转轴，前端盖和后端盖分别安装在机壳的两端，定子组件和转子组件安装在机壳的空腔里，转子组件上安装有磁环，其所述后端盖包括底板、从底板中央向控制器方向凸出的轴承座、以及在底板外缘拱起的环形凸台，在环形凸台与轴承座之间形成环形的凹槽，凹槽内设有通孔，在凹槽内安装有霍尔固定架，霍尔固定架上安装有霍尔线路板，霍尔线路板上的霍尔元件从通孔伸入到电机本体内并位于磁环旁。所述霍尔线路板安装方便，后端盖和霍尔固定架不易变形，避免了霍尔元件产生角度偏差。

Description

一种BLDC电机 技术领域：
本发明涉及一种BLDC电机。
背景技术：
目前的BLDC电机，包括电机本体和控制器，所述电机本体的前端伸出转轴，电机本体的尾端与控制器连接，其中，所述电机本体包括机壳、前端盖、后端盖、定子组件、转子组件和所述转轴，所述前端盖和后端盖分别安装在所述机壳的两端，所述定子组件和所述转子组件安装在所述机壳的空腔里，所述磁环安装在所述转子组件上，所述定子组件的定子端部绝缘上安装有霍尔线路板，霍尔线路板上的霍尔元件感应所述磁环的磁通量。这种结构存在如下问题：首先端部绝缘由于是塑胶材料容易变形，导致电机霍尔元件产生的角度偏差大，影响电机性能，霍尔线路板更换不便。
其次，一般在机壳安装出线孔，在出线孔上安装引线护套，电机引线从出线孔经过引线护套引出电机外，结构复杂，安装麻烦，制造成本高。
再次，现有的转轴两端设有扁位，转轴中间设有两个卡簧台阶，两卡簧台阶之间设有滚花或压筋，用于防止转轴与转子铁芯配合时打滑，这样的结构存在的问题：1、转轴与转子铁芯直接接触配合，电机旋转时会产生电流并传递到轴承上，导致电机轴承电蚀问题。2、对于双轴伸、长扁位电机，转子组件校动平衡是一个难题；因扁位长，校动平衡用的胶泥多，转子铁芯上受空间影响而粘不下；动平衡校不下来，导致电机振动大。
发明内容：
本发明的目的是提供一种BLDC电机，以解决现有技术中霍尔线路板安装不便、霍尔元件安装角度容易偏差的问题。
本发明的进一步目的是提供一种BLDC电机，以解决现有技术中电机出线结构不合理，安装麻烦的问题。
本发明的第三个目的是提供一种BLDC电机，以解决现有技术中电机轴承电蚀的问题。
本发明的目的是通过下述技术方案予以实现的。
一种BLDC电机，包括电机本体，所述电机本体的前端伸出转轴，所述电机本体包括机壳、前端盖、后端盖、定子组件、转子组件和所述转轴，所述前端盖和后端盖分别安装在所述机壳的两端，所述定子组件和所述转子组件安装在所述机壳的空腔里，所述转子组件上安装有磁环，所述后端盖包括底板、从所述底板中央向外凸出的轴承座、以及在所述底板外缘拱起的环形凸台，在所述环形凸台与所述轴承座之间形成环形的凹槽，所述凹槽内设有通孔，在所述凹槽内安装有霍尔固定架，霍尔固定架上安装有霍尔线路板，所述霍尔线路板上的霍尔元件从所述通孔伸入到所述电机本体内并位于所述磁环旁。
上述所述后端盖于所述凹槽内设有若干螺孔，所述霍尔固定架上与所述螺孔对应地设有若干弧形长孔，一螺丝穿过弧形长孔安装在所述螺孔内，所述霍尔固定架通过所述螺丝固定在所述凹槽内。
上述所述通孔为位于所述轴承座外围的弧形通孔，所述轴承座与所述底板之间通过三个连接块连接，所述连接块两侧向上延伸形成加强筋，所述加强筋连接所述轴承座侧壁，所述若干螺孔位于所述连接块旁。
上述所述霍尔固定架凹设有扇形的安装槽，所述安装槽底部向下凸出有三个套筒，所述套筒穿过所述通孔至所述磁环旁，所述霍尔线路板安装在安装槽内，所述霍尔线路板上的霍尔元件插入到所述套筒内。
上述所述霍尔固定架于所述安装槽两侧各设有一个所述弧形长孔。
上述所述霍尔固定架于所述安装槽的槽底向上凸出有凸柱，所述霍尔线路板上与所述凸柱对应设有若干安装孔，所述霍尔线路板通过所述安装孔与所述凸柱的配合安装在所述安装槽内。
上述所述安装槽的槽底向下还凸出有定位凸块，所述凹槽内凹设有扇形定位槽，所述定位凸块活动地安装在所述扇形定位槽内。
上述所述的电机本体的尾端与控制器连接，后端盖于所述凹槽内还设有出线孔，所述霍尔固定架与所述出线孔对应设有避位槽，电机引线从电机本体内穿过所述出线孔和所述避位槽伸入到所述控制器内。
上述后端盖外设有盖板覆盖凹槽，后端盖与盖板的边缘处设有引线出口。
上述的环形凸台设有若干个径向通槽，盖板外缘与径向通槽对应的设有若干拱形槽，拱形槽和径向通槽组合形成所述引线出口。
上述所述的盖板向上凸出有径向凸块，径向凸块底部形成引线通道，所述拱形槽位于引线通道的端部。
上述所述环形凸台上还设有若干卡孔，所述盖板底部与轴向的卡孔对应的设有若干卡扣，卡扣穿过卡孔扣紧后端盖底部，盖板通过卡扣固定在后端盖上。
上述所述的轴承座与底板之间通过三个连接块连接，所述连接块两侧向上延伸形成加强筋，在两个加强筋之间上设有平台，平台上设有安装螺孔，所述盖板底部与平台对应的凸出有安装柱，安装柱支撑在平台上，安装柱上通孔与安装螺孔对应，螺钉穿过通孔拧紧在安装螺孔上使盖板安装在后端盖上。
上述所述的转轴包括由金属材料制造的轴身，在轴身的端部设置第一扁位，在轴身的中段表面设置一段环形凹槽，环形凹槽中间形成铁芯连接段，铁芯连接段处注塑一个电绝缘的注塑体，所述的注塑体包括套筒部，套筒部套紧在铁芯连接段的外面，套筒部填充环形凹槽，套筒部的外表面设置滚花或压筋。
上述所述的注塑体还包括连接柱，铁芯连接段开设定位孔，连接柱位于套筒部的空腔里面，连接柱嵌套在定位孔里面。
上述所述的定位孔是通孔，连接柱的两端连接在空腔的内侧壁上。
上述所述压筋是轴向设置。
上述所述的铁芯连接段车削出第二扁位，第二扁位与第一扁位周向相差180度角。
上述在轴身的两端部都设置第一扁位，两端的第一扁位在周向所处位置的对齐。
上述所述的定位孔位于第二扁位上，在注塑体两端的轴身上设置有用于安装卡簧的卡槽。
本发明与现有技术相比，具有如下效果：
1)所述霍尔线路板通过霍尔固定架安装在后端盖上，安装方便，后端盖和霍尔固定架不易变形，避免了霍尔元件产生角度偏差，使霍尔线路板的感应效果更稳定，提高了电机性能；霍尔元件伸入到电机本体内并位于所述磁环旁，感应效果更好；
2)所述后端盖于所述凹槽内设有若干螺孔，所述霍尔固定架上与所述螺孔对应地设有若干弧形长孔，一螺丝穿过弧形长孔安装在所述螺孔内，所述霍尔固定架通过所述螺丝固定在所述凹槽内，霍尔固定架安装方便，弧形长孔使霍尔固定架与后端盖之间的角度可调，使霍尔元件与所述磁环之间的角度可调，提高了电机性能；
3)所述通孔为位于所述轴承座外围的弧形通孔，所述轴承座与所述底板之间通过三个连接块连接，所述连接块两侧向上延伸形成加强筋，所述加强筋连接所述轴承座侧壁，加强筋保证了后端盖的强度；
4)所述霍尔固定架凹设有扇形的安装槽，所述安装槽底部向下凸出有三个套筒，所述套筒穿过所述通孔至所述磁环旁，所述霍尔线路板安装在安装槽内，所述霍尔线路板的霍尔元件插入到所述套筒内，套筒既能保护霍尔元件，又能准确控制霍尔元件的位置；
5)所述凹槽于所述扇形通孔外围还设有出线孔，所述霍尔固定架与所述出线孔对应设有避位槽，出线孔和避位槽方便电机引线引出；
6)所述霍尔固定架于安装槽的槽底向上凸出有凸柱，霍尔线路板上与凸柱对应设有若干安装孔，霍尔线路板通过安装孔与凸柱的配合安装在安装槽内，霍尔线路板的安装方便。
7)后端盖外设有盖板覆盖凹槽，端盖与盖板的边缘处设有引线出口，电机引线通过端盖与盖板的配合方式固定，节省了护线套的使用，安装方便，还降 低了生产成本；
8)环形凸台设有若干个径向通槽，盖板外缘与径向通槽对应的设有若干拱形槽，拱形槽和径向通槽组合形成所述引线出口，结构简单，生产方便；所述盖板向上凸出有径向凸块，径向凸块底部形成引线通道，所述拱形槽位于引线通道的端部，径向凸块可防止盖板挤压电机引线，外观更美观；
9)盖板通过卡扣固定在后端盖上，盖板倒扣在后端盖上固定，平台上设有安装螺孔，所述盖板底部与平台对应的凸出有安装柱，安装柱支撑在平台上，安装柱上通孔与安装螺孔对应，螺钉穿过通孔拧紧在安装螺孔上使盖板安装在后端盖上，安装方便，连接可靠；
10)本实用新型的转轴包括由金属材料制造的轴身，在轴身的端部设置第一扁位，在轴身的中段设置一段环形凹槽，环形凹槽中间形成铁芯连接段，铁芯连接段开设定位孔，铁芯连接段处注塑一个电绝缘的注塑体，避免电机旋转时会产生电流由转子传递到转轴和轴承上，有效减少电机轴承电蚀问题；所述的注塑体包括套筒部和连接柱，套筒部套紧在铁芯连接段的外面，套筒部填充环形凹槽，连接柱位于套筒部的空腔里面，连接柱嵌套在定位孔里面，套筒部的外表面设置滚花或压筋，结构简单，加工容易，连接牢固。
11)本实用新型的转轴的铁芯连接段处注塑一个电绝缘的注塑体的外径按需求大小开模制作，滚花或压筋与轴径一起开模成型，注塑成型的滚花或压筋位置与转子铁芯配合，工艺简单，加工效率高，精度容易控制。
12)本实用新型的转轴在轴身的两端部都设置第一扁位，两端的第一扁位在周向所处角度位置的对齐铁芯连接段车削出第二扁位，第二扁位与第一扁位周向相差180度角。弥补转轴第一扁位引起的重量不均衡问题，减少转子组件校动平衡时胶泥的用量，可解决胶泥粘不下的问题。
13)在注塑体两端的轴身上设置有用于安装卡簧的卡槽，便于对转子组件进行轴向定位。
14)所述的注塑体还包括连接柱，铁芯连接段开设定位孔，连接柱位于套 筒部的空腔里面，连接柱嵌套在定位孔里面。使到轴身与注塑体连接更加牢固。
附图说明：
图1是本发明实施例一提供的一种BLDC电机的结构示意图；
图2是图1的A-A剖视图；
图3是图2的B处放大图；
图4是本发明实施例一提供的BLDC电机的爆炸图；
图5是图4的C处放大图；
图6是图4的D处放大图；
图7是本实用新型实施例二提供的双轴伸电机的结构示意图；
图8是本实用新型实施例二提供的双轴伸电机的俯视图；
图9是图8的E-E剖视图；
图10是图9的F处放大图；
图11是本实用新型实施例二提供的双轴伸电机的爆炸图；
图12是本实用新型实施例二提供的双轴伸电机中盖板的结构示意图；
图13是本实用新型实施例二的盖板另一角度的结构示意图；
图14是本实用新型实施例二提供的双轴伸电机中后端盖的结构示意图；
图15是本实用新型实施例三提供的双轴伸电机的结构示意图；
图16是本实用新型实施例四电机转轴的立体图；
图17是本实用新型实施例四电机转轴的主视图；
图18是图17的H-H剖视图；
图19是本实用新型实施例四的轴身的立体图；
图20是本实用新型实施例四的轴身的主视图；
图21是图20的K-K剖视图；
图22是本实用新型实施例四的注塑体的立体图；
图23是本实用新型实施例四注塑体的俯视图；
图24是图23的J-J剖视图；
图25是本实用新型实施例四的转子组件与转轴的装配剖视图；
具体实施方式：
下面通过具体实施例并结合附图对本发明作进一步详细的描述。
如图1至图6所示，本实施例提供的是一种BLDC电机，包括电机本体10和控制器9，所述电机本体10的前端伸出转轴8，电机本体10的尾端与控制器9连接，其中，所述电机本体10包括机壳4、前端盖5、后端盖1、定子组件6、转子组件7和所述转轴8，所述前端盖5和后端盖1分别安装在所述机壳4的两端，所述定子组件6和所述转子组件7安装在所述机壳4的空腔里，所述转子组件7上安装有磁环32，其特征在于：所述后端盖1包括底板11、从所述底板11中央向所述控制器9方向凸出的轴承座12、以及在所述底板11外缘拱起的环形凸台13，在所述环形凸台13与所述轴承座12之间形成环形的凹槽14，所述凹槽14内设有通孔15，在所述凹槽14内安装有霍尔固定架2，霍尔固定架2上安装有霍尔线路板31，所述霍尔线路板31上的霍尔元件311从所述通孔15伸入到所述电机本体10内并位于所述磁环32旁。
本实施例所述BLDC电机，所述霍尔线路板31通过霍尔固定架2安装在后端盖1上，安装方便，后端盖1和霍尔固定架2不易变形，避免了霍尔元件311产生角度偏差，使霍尔线路板31的感应效果更稳定，提高了电机性能；霍尔元件311伸入到电机本体1内并位于所述磁环32旁，感应效果更好。
上述所述后端盖1于所述凹槽14内设有若干螺孔16，所述霍尔固定架2上与所述螺孔16对应地设有若干弧形长孔23，一螺丝27穿过弧形长孔23安装在所述螺孔16内，所述霍尔固定架2通过所述螺丝27固定在所述凹槽14内。弧形长孔23使霍尔固定架2与后端盖1之间的角度可调，使霍尔元件311与所述磁环32之间的角度可调，提高了电机性能。
上述所述通孔15为位于所述轴承座12外围的弧形通孔，所述轴承座12与所述底板11之间通过三个连接块17连接，所述连接块17两侧向上延伸形成加 强筋171，所述加强筋171连接所述轴承座12侧壁，所述若干螺孔16位于所述连接块17旁。所述轴承座12内安装有轴承75，所述转轴8通过所述轴承75支承在所述机壳4内。所述加强筋171保证了后端盖1的强度。
上述所述霍尔固定架2凹设有扇形的安装槽21，所述安装槽21底部向下凸出有三个套筒22，所述套筒22穿过所述通孔15至所述磁环32旁，所述霍尔线路板31安装在安装槽21内，所述霍尔线路板31上的霍尔元件311插入到所述套筒22内。套筒22既能保护霍尔元件311，又能准确控制霍尔元件311的位置。
上述所述霍尔固定架2于所述安装槽21两侧各设有一个所述弧形长孔23。
上述所述后端盖1于所述凹槽14内还设有出线孔18，所述霍尔固定架2与所述出线孔18对应设有避位槽24，电机引线(未示出)从电机本体10内穿过所述出线孔18和所述避位槽24伸入到所述控制器9内。出线孔18和避位槽24方便电机引线引出。
上述所述霍尔固定架2于所述安装槽21的槽底向上凸出有凸柱25，所述霍尔线路板31上与所述凸柱25对应设有若干安装孔312，所述霍尔线路板31通过所述安装孔312与所述凸柱25的配合安装在所述安装槽21内。霍尔线路板31的安装方便。
上述所述安装槽21的槽底向下还凸出有定位凸块26，所述凹槽14内凹设有扇形定位槽141，所述定位凸块26活动地安装在所述扇形定位槽141内。
实施例二：
本实施例是在实施例一基础上的改动，改动的地方是：将控制器9从后端盖1拆开，将控制器9分离与电机本体10分离开来，然后将转轴8伸出后端盖1，形成双轴伸的BLDC电机。具体如下：
如图7至图14所示，本实施例提供的是一种双轴伸BLDC电机，包括机壳4、前端盖5、后端盖1、定子组件6、转子组件7和转轴8，前端盖5和后端盖1分别安装在机壳4的两端形成空腔40，转轴8两端分别从前端盖5和后端盖1 伸出，定子组件6和转子组件7安装在机壳4的空腔40里，转子组件7上安装有磁环32，其特征在于：后端盖1设有凹槽14，凹槽14底部设有通孔15，凹槽14内安装有霍尔固定架2，霍尔固定架2上安装有霍尔线路板31，霍尔线路板31上的霍尔元件从通孔15伸入到空腔40里面的磁环32旁，后端盖1外设有盖板100覆盖凹槽14，后端盖1与盖板100的边缘处设有引线出口101。所述前端盖5和后端盖1上安装有减震圈92。
本实施例所述双轴伸电机，霍尔线路板31通过霍尔固定架2安装在其中一个端盖(后端盖1)上，安装维修方便，还可避免了霍尔元件产生角度偏差，提高了电机性能；电机引线通过后端盖1与盖板100的配合方式固定，节省了护线套的使用，安装方便，还降低了生产成本。
所述盖板100覆盖在后端盖1上，后端盖1包括底板11、从底板11中央向所述盖板100方向凸出的轴承座12、以及在底板11外缘拱起的环形凸台13，所述凹槽14位于环形凸台13与轴承座12之间，环形凸台13设有若干个径向通槽131，盖板100外缘与径向通槽131对应的设有若干拱形槽102，拱形槽102和径向通槽131组合形成所述引线出口101，结构简单，生产方便。
上述所述盖板100向上凸出有径向凸块103，径向凸块103底部形成引线通道104，所述拱形槽102位于引线通道104的端部。径向凸块103可防止盖板100挤压电机引线，外观更美观。
优选的，上述所述凹槽14为环形凹槽。盖板100与后端盖1之间、在引线出口101两侧通过螺丝108压紧。所述轴承座12内安装有轴承，转轴8通过轴承支承在前端盖5和后端盖1上。(轴承93删除附图标号)
上述所述后端盖1于所述凹槽14内还设有过线孔18，所述霍尔固定架2与过线孔18对应设有避位槽24，电机引线穿过过线孔18、避位槽24伸进所述霍尔固定架2上方。
上述所述环形凸台13上还设有若干卡孔132，所述盖板100底部与轴向的卡孔132对应的设有若干卡扣105，卡扣105穿过卡孔132扣紧后端盖1底部， 盖板100通过卡扣105固定在后端盖1上。盖板100倒扣在后端盖1上固定，安装方便。
上述所述后端盖1于所述凹槽14内设有若干螺孔16，所述霍尔固定架2上与螺孔16对应地设有若干弧形长孔23，一螺丝穿过弧形长孔23安装在螺孔16内，霍尔固定架2通过螺丝固定在凹槽14内。弧形长孔23使霍尔固定架2与后端盖1之间的角度可调，使霍尔元件与所述磁环32之间的角度可调，提高了电机性能。
所述轴承座12与底板11之间通过三个连接块17连接，所述连接块17两侧向上延伸形成加强筋171，在两个加强筋171之间上设有平台172，平台172上设有安装螺孔173，所述盖板100底部与平台172对应的凸出有安装柱106，安装柱106支撑在平台172上，安装柱106上通孔107与安装螺孔173对应，螺钉穿过通孔107拧紧在安装螺孔173上使盖板100安装在后端盖1上。
实施例三：
本实施例是在实施例二基础上的改动，不同之处在于：将盖板100顶部的径向凸块103，盖板100顶部是一个平整的面。具体如下：
如图15所示，所述后端盖1包括底板11、从底板11中央向所述盖板8方向凸出的轴承座12、以及在底板11外缘拱起的环形凸台13，所述凹槽14位于环形凸台13与轴承座12之间，环形凸台13设有若干个径向通槽131，径向通槽131顶部被盖板8覆盖并形成所述引线出口9。
实施例四：
如图16至图25所示，本实施例是对转轴8的改良，转轴8包括由金属材料制造的轴身81，在轴身81的端部设置第一扁位82，在轴身81的中段表面设置一段环形凹槽83，环形凹槽83中间形成铁芯连接段84，铁芯连接段84处注塑一个电绝缘的注塑体85，所述的注塑体85包括套筒部851，套筒部851套 紧在铁芯连接段84的外面，套筒部851填充环形凹槽83，套筒部851的外表面压筋8511。所述压筋8511是轴向设置。当然本领域普通技术人员也容易想到套筒部851的外表面设置滚花。
所述的注塑体85还包括连接柱852，铁芯连接段84开设定位孔841，连接柱852位于套筒部851的空腔850里面，连接柱852嵌套在定位孔841里面。
上述所述的定位孔841是通孔，连接柱852的两端连接在空腔850的内侧壁上。
上述所述的铁芯连接段84车削出第二扁位86，第二扁位86与第一扁位82周向相差180度角。
上述所述在轴身81的两端部都设置第一扁位82，两端的第一扁位82在周向所处位置的对齐。
上述所述的定位孔841位于第二扁位86上。
上述注塑体85两端的轴身81上设置有用于安装卡簧的卡槽87。
转子组件7包括转子铁芯71和磁瓦，转子铁芯71中间设置轴孔，转轴8插装在轴孔里面，套筒部851嵌入到轴孔里面，使到轴身81与转子铁芯71电绝缘。
以上实施例为本发明的较佳实施方式，但本发明的实施方式不限于此，其他任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化，均为等效的置换方式，都包含在本发明的保护范围之内。

Claims (20)

  1. 一种BLDC电机，包括电机本体(10)，所述电机本体(10)的前端伸出转轴(8)，所述电机本体(10)包括机壳(4)、前端盖(5)、后端盖(1)、定子组件(6)、转子组件(7)和所述转轴(8)，所述前端盖(5)和后端盖(1)分别安装在所述机壳(4)的两端，所述定子组件(6)和所述转子组件(7)安装在所述机壳(4)的空腔里，所述转子组件(7)上安装有磁环(32)，其特征在于：所述后端盖(1)包括底板(11)、从所述底板(11)中央向外凸出的轴承座(12)、以及在所述底板(11)外缘拱起的环形凸台(13)，在所述环形凸台(13)与所述轴承座(12)之间形成环形的凹槽(14)，所述凹槽(14)内设有通孔(15)，在所述凹槽(14)内安装有霍尔固定架(2)，霍尔固定架(2)上安装有霍尔线路板(31)，所述霍尔线路板(31)上的霍尔元件(311)从所述通孔(15)伸入到所述电机本体(10)内并位于所述磁环(32)旁。
  2. 根据权利要求1所述的一种BLDC电机，其特征在于：所述后端盖(1)于所述凹槽(14)内设有若干螺孔(16)，所述霍尔固定架(2)上与所述螺孔(16)对应地设有若干弧形长孔(23)，一螺丝(27)穿过弧形长孔(23)安装在所述螺孔(16)内，所述霍尔固定架(2)通过所述螺丝(27)固定在所述凹槽(14)内。
  3. 根据权利要求2所述的一种BLDC电机，其特征在于：所述通孔(15)为位于所述轴承座(12)外围的弧形通孔，所述轴承座(12)与底板(11)之间通过三个连接块(17)连接，所述连接块(17)两侧向上延伸形成加强筋(171)，所述加强筋(171)连接所述轴承座(12)侧壁，所述若干螺孔(16)位于所述连接块(17)旁。
  4. 根据权利要求3所述的一种BLDC电机，其特征在于：所述霍尔固定架(2)凹设有扇形的安装槽(21)，所述安装槽(21)底部向下凸出有三个套筒(22)，所述套筒(22)穿过所述通孔(15)至所述磁环(32)旁，所述霍尔线路板(31)安装在安装槽(21)内，所述霍尔线路板(31)上的霍尔元件(311) 插入到所述套筒(22)内。
  5. 根据权利要求4所述的一种BLDC电机，其特征在于：所述霍尔固定架(2)于所述安装槽(21)两侧各设有一个所述弧形长孔(23)。
  6. 根据权利要求5所述的一种BLDC电机，其特征在于：所述霍尔固定架(2)于所述安装槽(21)的槽底向上凸出有凸柱(25)，所述霍尔线路板(31)上与所述凸柱(25)对应设有若干安装孔(312)，所述霍尔线路板(31)通过所述安装孔(312)与所述凸柱(25)的配合安装在所述安装槽(21)内。
  7. 根据权利要求6所述的一种BLDC电机，其特征在于：所述安装槽(21)的槽底向下还凸出有定位凸块(26)，所述凹槽(14)内凹设有扇形定位槽(141)，所述定位凸块(26)活动地安装在所述扇形定位槽(141)内。
  8. 根据权利要求1至7任何一项所述的一种BLDC电机，其特征在于：所述电机本体(10)的尾端与控制器(9)连接，后端盖(1)于所述凹槽(14)内还设有出线孔(18)，所述霍尔固定架(2)与所述出线孔(18)对应设有避位槽(24)，电机引线从电机本体(10)内穿过所述出线孔(18)和所述避位槽(24)伸入到所述控制器(9)内。
  9. 根据权利要求1至7任何一项所述的一种BLDC电机，其特征在于：后端盖(1)外设有盖板(100)覆盖凹槽(14)，后端盖(1)与盖板(100)的边缘处设有引线出口(101)。
  10. 根据权利要求9所述的一种BLDC电机，其特征在于：环形凸台(13)设有若干个径向通槽(131)，盖板(100)外缘与径向通槽(131)对应的设有若干拱形槽(102)，拱形槽(102)和径向通槽(131)组合形成所述引线出口(101)。
  11. 根据权利要求10所述的一种BLDC电机，其特征在于：所述盖板(100)向上凸出有径向凸块(103)，径向凸块(103)底部形成引线通道(104)，所述拱形槽(102)位于引线通道(104)的端部。
  12. 根据权利要求11所述的一种BLDC电机，其特征在于：所述环形凸台(13) 上还设有若干卡孔(132)，所述盖板(100)底部与轴向的卡孔(132)对应的设有若干卡扣(105)，卡扣(105)穿过卡孔(132)扣紧后端盖(1)底部，盖板(100)通过卡扣(105)固定在后端盖(1)上。
  13. 根据权利要求12所述的一种BLDC电机，其特征在于：所述轴承座(12)与底板(11)之间通过三个连接块(17)连接，所述连接块(17)两侧向上延伸形成加强筋(171)，在两个加强筋(171)之间上设有平台(172)，平台(172)上设有安装螺孔(173)，所述盖板(100)底部与平台(172)对应的凸出有安装柱(106)，安装柱(106)支撑在平台(172)上，安装柱(106)上通孔(107)与安装螺孔(173)对应，螺钉穿过通孔(107)拧紧在安装螺孔(173)上使盖板(100)安装在后端盖(1)上。
  14. 根据权利要求1至7任何一项所述的一种BLDC电机，其特征在于：所述的转轴(8)包括由金属材料制造的轴身(80)，在轴身(80)的端部设置第一扁位(81)，在轴身(80)的中段表面设置一段环形凹槽(82)，环形凹槽(82)中间形成铁芯连接段(83)，铁芯连接段(83)处注塑一个电绝缘的注塑体(200)，所述的注塑体(200)包括套筒部(201)，套筒部(201)套紧在铁芯连接段(83)的外面，套筒部(201)填充环形凹槽(82)，套筒部(201)的外表面设置滚花或压筋(202)。
  15. 根据权利要求14任何一项所述的一种BLDC电机，其特征在于：所述的注塑体(200)还包括连接柱(203)，铁芯连接段(83)开设定位孔(84)，连接柱(203)位于套筒部(201)的空腔(204)里面，连接柱(203)嵌套在定位孔(84)里面。
  16. 根据权利要求15任何一项所述的一种BLDC电机，其特征在于：所述的定位孔(84)是通孔，连接柱(203)的两端连接在空腔(204)的内侧壁上。
  17. 根据权利要求16任何一项所述的一种BLDC电机，其特征在于：所述压筋(202)是轴向设置。
  18. 根据权利要求17任何一项所述的一种BLDC电机，其特征在于：所述 的铁芯连接段(83)车削出第二扁位(85)，第二扁位(85)与第一扁位(81)周向相差180度角。
  19. 根据权利要求18任何一项所述的一种BLDC电机，其特征在于：在轴身(80)的两端部都设置第一扁位(81)，两端的第一扁位(81)在周向所处位置的对齐。
  20. 根据权利要求19任何一项所述的一种BLDC电机，其特征在于：定位孔(84)位于第二扁位(85)上，在注塑体(200)两端的轴身(80)上设置有用于安装卡簧的卡槽(86)。
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