CN117040223A - Brushless motor processing technology for electric drill - Google Patents
Brushless motor processing technology for electric drill Download PDFInfo
- Publication number
- CN117040223A CN117040223A CN202310872454.7A CN202310872454A CN117040223A CN 117040223 A CN117040223 A CN 117040223A CN 202310872454 A CN202310872454 A CN 202310872454A CN 117040223 A CN117040223 A CN 117040223A
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- assembling
- rear cover
- electric drill
- brushless motor
- wire frame
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- 238000005516 engineering process Methods 0.000 title claims abstract description 11
- 238000004804 winding Methods 0.000 claims abstract description 19
- 239000003973 paint Substances 0.000 claims abstract description 6
- 230000017525 heat dissipation Effects 0.000 claims description 22
- 230000000149 penetrating effect Effects 0.000 claims description 19
- 241000883990 Flabellum Species 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 3
- GBUCDGDROYMOAN-UHFFFAOYSA-N 1,2,5-trichloro-3-phenylbenzene Chemical compound ClC1=CC(Cl)=C(Cl)C(C=2C=CC=CC=2)=C1 GBUCDGDROYMOAN-UHFFFAOYSA-N 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- LVROLHVSYNLFBE-UHFFFAOYSA-N 2,3,6-trichlorobiphenyl Chemical compound ClC1=CC=C(Cl)C(C=2C=CC=CC=2)=C1Cl LVROLHVSYNLFBE-UHFFFAOYSA-N 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/14—Casings; Enclosures; Supports
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- 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
- H02K11/0094—Structural association with other electrical or electronic devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/08—Forming windings by laying conductors into or around core parts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The application discloses a brushless motor processing technology for an electric drill, which belongs to the technical field of motors and comprises the following steps of S1: assembling a stator; the winding frame comprises an upper wire frame and a lower wire frame, and the upper wire frame and the lower wire frame are respectively inserted into two sides of the stator core; s2: treating enameled wires; cutting the three groups of wound enameled wires, and then, performing paint removal treatment on the end parts of the cut enameled wires; s3: the front cover is installed; mounting the front cover on one end of the upper wire frame far away from the lower wire frame; s4: assembling a rotor; the shaft core and the rotor core are coaxially and fixedly assembled; s5: assembling fan blades; coaxially and fixedly assembling the fan blades to the shaft core; s6: assembling a motor; placing one end of the shaft core, which is far away from the fan blade, in a winding frame; s7: assembling a control module; and installing two PCB boards forming the control module to one end of the rear cover far away from the front cover. The application has the effects of facilitating the installation of the motor to the installation position of the shell by the staff and improving the installation efficiency.
Description
Technical Field
The application relates to the field of motors, in particular to a brushless motor processing technology for an electric drill.
Background
The electric drill is a portable drilling tool, and mainly consists of a shell, a motor, a control switch, a drill chuck and a drill bit. The electric drill is an electric tool product with the largest demand, and is widely applied to the relevant installation fields of wallboards, support rails, guide rails, steel structure plants and the like.
The motor for the electric drill in the related art generally adopts a brushless motor, and specifically comprises a motor module and a control module, wherein the control module and the motor module are respectively arranged at different positions of a shell, and pulse signals are transmitted through an encoder of the control module so as to drive the motor module to work.
With respect to the related art, the inventor considers that the motor module and the control module of the motor require the staff to be assembled to two different mounting positions of the housing respectively, and the mounting operation is complicated and the efficiency is low.
Disclosure of Invention
In order to facilitate a worker to mount a motor to a mounting position of a shell and improve mounting efficiency, the application provides a brushless motor processing technology for an electric drill.
The application provides a brushless motor processing technology for an electric drill, which adopts the following technical scheme:
a brushless motor processing technology for an electric drill comprises the following steps of: assembling a stator; the winding frame comprises an upper wire frame and a lower wire frame, the upper wire frame and the lower wire frame are respectively inserted into two sides of the stator core, and the assembled winding frame is wound with enameled wires to form a stator; s2: treating enameled wires; the wound enameled wires are provided with three groups, the three groups of wound enameled wires are cut, and then the end parts of the cut enameled wires are subjected to paint removal treatment; s3: the front cover is installed; mounting the front cover on one end of the upper wire frame far away from the lower wire frame; s4: assembling a rotor; the method comprises the steps of coaxially and fixedly assembling a shaft core and a rotor core, wherein the rotor core is provided with a plurality of mounting grooves which are arranged in a penetrating manner, magnets are arranged in the mounting grooves, and the magnets are fixed by gluing after being leveled with the end face of the rotor core; s5: assembling fan blades; coaxially and fixedly assembling the fan blades to the shaft core, and then assembling bearings at two ends of the shaft core; s6: assembling a motor; placing one end of the shaft core, which is far away from the fan blade, in the winding frame, mounting the rear cover to one end of the shaft core, which is close to the fan blade, fixing the front cover and the rear cover through screws, wherein one end of the rear cover, which is far away from the front cover, is provided with a rear heat dissipation hole which is arranged in a penetrating way; s7: assembling a control module; and installing two PCB boards forming the control module to one end of the rear cover far away from the front cover.
By adopting the technical scheme, the control module and the motor module can be integrally assembled, the assembled motor is mounted to the same mounting position of the shell during mounting, the operation is simple and convenient, the mounting efficiency of the motor is improved, and meanwhile, the integrated arrangement is also beneficial to simplifying wiring and saving the mounting space; in addition, the fan blade rotates and can absorb heat generated when the shaft core drives the rotor core to rotate, and the fan blade can also perform blowing and heat dissipation treatment on the control module, so that the running stability of the motor is further guaranteed, and the split treatment of the upper wire frame and the lower wire frame is also convenient for realizing the assembly of the winding frame and the stator core.
Optionally, in the step S1, the upper wire frame includes an upper frame body and an upper connecting portion fixedly connected to the upper frame body, and three limiting grooves penetrating through the upper frame body along an axial direction are formed on one side, away from the upper frame body, of the upper connecting portion.
Through adopting above-mentioned technical scheme, the setting of spacing groove is convenient for place respectively three groups enameled wires after the winding respectively for the enameled wire is difficult for intertwining, thereby is favorable to guaranteeing motor operation stability integrates.
Optionally, two enameled wires are arranged in each group in the step S2, one group of enameled wires close to the upper connecting part is cut to be 50-55 mm, and the other two groups of enameled wires are cut to be 75-mm-80 mm; after the enamel removing treatment of the enamelled wires, the two groups of two enamelled wires far away from the upper connecting part are twisted for 2-4 circles.
Through adopting above-mentioned technical scheme, be convenient for guarantee finally bend and accomodate the uniformity of length behind three spacing inslot, and the enameled wire twists reverse setting be convenient for guarantee motor final performance.
Optionally, in the step S6, the rear cover is fixedly connected with four clamping bars extending along the axis direction of the rear cover, and two adjacent clamping bars form clamping grooves therebetween, each clamping groove is respectively arranged in one-to-one correspondence with each limiting groove, and the rear cover is fixedly connected with a plurality of hooks circumferentially distributed around the axis of the rear cover.
Through adopting above-mentioned technical scheme, the setting of screens groove is convenient for further spacing to accomodate the enameled wire in the spacing groove, and the setting of pothook is convenient for collude the connecting wire of control module and hold spacing, is convenient for when handling motor integration, further accomodates the arrangement to each connecting wire.
Optionally, in the step S5, the flabellum includes fixed part, blade portion, guiding part and holding ring, the fixed part is cylindricly, the fixed orifices that runs through the setting along self axis direction has been seted up to fixed part one end, axle core interference fit is in the fixed orifices, the guiding part is the loudspeaker form that one end opening grow gradually, the less one end body coupling of guiding part opening is in fixed part one end, the blade portion is dull and stereotyped form, blade portion body coupling has a plurality ofly in guiding part outer peripheral face and around guiding part axis circumference distribution, the internal diameter of holding ring is greater than the diameter of fixed part, a plurality of the equal fixed connection in holding ring of one side that the guiding part was kept away from to the blade portion.
Through adopting above-mentioned technical scheme, the setting of fixed orifices is convenient for realize fixing between flabellum and the axle core, and when the flabellum rotated along with the axle core together, the clearance between two adjacent blade portions and the holding ring is convenient for when carrying out the heat dissipation to control module, the heat that produces when rotating the rotor discharges to be favorable to further guaranteeing the stability of motor when using after the equipment is accomplished.
Optionally, a plurality of lightening holes are formed in one end, far away from the guide portion, of the fixing portion, and the lightening holes are circumferentially distributed around the axis of the fixing portion.
Through adopting above-mentioned technical scheme, the setting of lightening hole is convenient for reduce the weight of flabellum under the prerequisite of guaranteeing flabellum radiating action, further strengthens the suitability of motor after the equipment is accomplished.
Optionally, in the step S5, the fan blade is coaxially and fixedly assembled to one end of the shaft core, and the balancing piece is coaxially and fixedly installed to the other end of the shaft core, so that the fan blade and the balancing piece respectively abut against two ends of the rotor core.
Through adopting above-mentioned technical scheme, the dynamic balance when the axis rotates is favorable to guaranteeing to the setting of balancing piece to further guarantee the stability when the axle core is finally rotated.
Optionally, the number of the installation grooves and the number of the magnets in the step S4 are four, the installation grooves and the magnets are uniformly distributed around the axial direction of the rotor core, two groups of overflow holes penetrating the rotor core are formed in one end of the rotor core, and the two groups of overflow holes are respectively located in the area surrounded by the installation grooves and outside the area.
Through adopting above-mentioned technical scheme, the setting of four mounting grooves and magnet is favorable to guaranteeing rotor core rotation stability in the time, realizes the quick installation to magnet, easy and simple to handle, and the setting of overflow hole is convenient for realize the holding to unnecessary glue simultaneously and handles fast.
Optionally, two PCB boards in S7 are established to first PCB board and second PCB board respectively, first PCB board is close to the flabellum setting, the second PCB board is located the one side that the flabellum was kept away from to first PCB board, the second PCB board is connected with first PCB board through welding the row needle, one side fixedly connected with heat dissipation aluminum sheet of first PCB board orientation flabellum.
Through adopting above-mentioned technical scheme, the second PCB board is convenient stable in connection between first PCB board, carries out forced convection through the rotation of flabellum and the cooperation of heat dissipation aluminum sheet to be convenient for under the performance prerequisite of guaranteeing control module, realize the heat dissipation treatment to first PCB board fast.
Optionally, in the step S6, a plurality of rear air passing holes penetrating through the outer peripheral surface of the rear cover are formed, a gap is formed between the rear cover and the front cover, and rust-preventive oil is coated on a part of the stator core, which is located in the gap between the rear cover and the front cover.
Through adopting above-mentioned technical scheme, the setting of back via hole is convenient for the heat that produces when faster discharge axis rotates, simultaneously, and rust-preventive oil's setting makes stator core be difficult for corrosion, is favorable to further guaranteeing stator core's life.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the control module and the motor module can be integrally assembled, the assembled motor is installed to the installation position of the shell during installation, the operation is simple and convenient, the improvement of the installation efficiency of the motor is facilitated, and meanwhile, the integrated arrangement is also beneficial to simplifying wiring and saving the installation space.
2. The fan blade rotates and can absorb heat generated when the shaft core drives the rotor core to rotate, and the fan blade can also perform blowing and heat dissipation treatment on the control module, so that the running stability of the motor is further guaranteed, and the split treatment of the upper wire frame and the lower wire frame is also convenient for realizing the assembly of the winding frame and the stator core.
3. The flabellum is convenient for realize the heat dissipation to first PCB board fast and handles, and the setting of heat dissipation aluminum sheet is convenient for under the performance prerequisite of guaranteeing control module, try down you fast to the heat dissipation of second PCB board.
Drawings
FIG. 1 is a schematic illustration of a process flow according to an embodiment of the application.
Fig. 2 is a schematic overall structure of an embodiment of the present application.
Fig. 3 is an exploded view of a bobbin and a stator core according to an embodiment of the present application.
FIG. 4 is an exploded view of a fan blade and a balancing member and a shaft according to an embodiment of the present application.
Fig. 5 is a schematic structural view of a fan blade according to an embodiment of the present application.
Fig. 6 is an exploded view of the overall structure of an embodiment of the present application.
Reference numerals illustrate:
1. feeding a wire frame; 101. an upper frame body; 102. an upper connection part; 2. a wire laying frame; 3. a stator core; 4. A limit groove; 5. a front cover; 6. a shaft core; 7. a rotor core; 8. a mounting groove; 9. a magnet; 10. an overflow aperture; 11. a fan blade; 111. a fixing part; 112. a blade section; 113. a guide part; 114. a positioning ring; 12. a lightening hole; 13. a balance member; 14. a weight port; 15. rear heat dissipation holes; 16. bearing mounting holes; 17. an abutment bar; 18. a bearing; 19. a rear wind hole; 20. a clamping strip; 21. a clamping groove; 22. a clamping hook; 23. a first PCB board; 24. a second PCB board; 25. a gear part; 26. a gear notch; 27. an encoder; 28. a heat radiation aluminum sheet; 29. a fixing hole; 30. a rear cover; 31. a limit part; 32. a positioning part; 33. and positioning holes.
Detailed Description
The application is described in further detail below with reference to fig. 1-6.
The embodiment of the application discloses a brushless motor processing technology for an electric drill. Referring to fig. 1, the brushless motor processing process for an electric drill includes the following steps, S1: assembling a stator; the winding frame comprises an upper winding frame 1 and a lower winding frame 2, the upper winding frame 1 and the lower winding frame 2 are respectively inserted into two sides of a stator core 3, and the assembled winding frame is wound with enameled wires to form a stator.
Referring to fig. 2 and 3, specifically, the upper wire frame 1 includes an upper frame body 101 and an upper connecting portion 102 integrally and fixedly connected to the upper frame body 101, and three parallel limit grooves 4 penetrating through the upper frame body 101 along an axial direction are formed on one side, away from the upper frame body 101, of the upper connecting portion 102, so that enamelled wires (not shown in the drawings) wound subsequently are placed respectively, the enamelled wires are not easy to wind each other, and storage of the enamelled wires is regular.
S2: treating enameled wires; the wound enameled wires are provided with three groups, the three groups of wound enameled wires are cut, and then the end parts of the cut enameled wires are subjected to paint removal treatment.
Specifically, two enameled wires are arranged in each group, one group of enameled wires close to the upper connecting part 102 is cut to 50 mm-56 mm, 53mm is selected in the embodiment of the application, the other two groups of enameled wires are cut to 75 mm-81 mm, 78mm is selected in the embodiment of the application, the length of the enameled wire paint removal is 12 mm-18 mm, 15mm is selected in the embodiment of the application, and the diameter of the enameled wire paint removal is greater than or equal to 0.70mm, and 0.72mm is selected in the embodiment of the application.
After the enamel-covered wires are subjected to the power-on test, the qualified products and the defective products are screened, one group of enamel-covered wires close to the upper connecting part 102 in the qualified products are directly placed in the limiting groove 4 in the middle, the other two groups of two enamel-covered wires are twisted for 2-4 circles, and the enameled wires are respectively placed in the two limiting grooves 4 on the two sides after being twisted for 3 circles in the embodiment of the application.
S3: a front cover 5 is installed; a front cover 5 is mounted to the end of the upper bobbin 1 remote from the lower bobbin 2.
S4: assembling a rotor; the shaft core 6 and the rotor core 7 are coaxially and fixedly assembled, the rotor core 7 is provided with a plurality of mounting grooves 8 which are arranged in a penetrating mode, magnets 9 are mounted in the mounting grooves 8, and the magnets 9 are fixed by gluing after being flush with the end face of the rotor core 7.
Referring to fig. 4, specifically, the length of the shaft core 6 penetrating out of both ends of the rotor core 7 after the fixed assembly with the rotor core 7 is unequal. In the embodiment of the application, the number of the mounting grooves 8 and the magnets 9 is four, the mounting grooves 8 and the magnets 9 are uniformly distributed along the circumferential direction of the axis of the rotor core 7, two groups of overflow holes 10 which are arranged in a penetrating manner are formed in one end of the rotor core 7, each group of overflow holes 10 is four, each group of overflow holes 10 is uniformly distributed along the circumferential direction of the axis of the rotor core 7, the two groups of overflow holes 10 are respectively positioned in and outside the area surrounded by the mounting grooves 8, and the arrangement of the overflow holes 10 is convenient for rapidly realizing the storage and holding treatment of redundant glue.
S5: assembling the fan blades 11; the fan blades 11 are coaxially and fixedly assembled to the shaft core 6, and then bearings 18 are assembled at both ends of the shaft core 6.
Referring to fig. 5 and 6, specifically, the fan blade 11 includes a fixing portion 111, a blade portion 112, a guiding portion 113 and a positioning ring 114, the fixing portion 111 is cylindrical, a fixing hole 29 penetrating along an axis direction of the fixing portion 111 is formed in a middle portion of one end of the fixing portion, and the shaft core 6 is interference-fitted in the fixing hole 29, so as to achieve stable connection between the fan blade 11 and the shaft core 6. The guide portion 113 has a horn shape with an opening at one end thereof gradually becoming larger, one end of the guide portion 113 having a smaller opening is integrally connected to one end of the fixing portion 111, the blade portion 112 has a flat plate shape, and the blade portion 112 is integrally connected to the outer peripheral surface of the guide portion 113 and is circumferentially distributed in plurality around the axis of the guide portion 113. The positioning ring 114 is coaxially arranged with the fixing portion 111, the inner diameter of the positioning ring 114 is larger than the diameter of the fixing portion 111, and one sides of the blade portions 112, which are far away from the guiding portion 113, are fixedly connected to the positioning ring 114. When the fan blades 11 rotate along with the shaft core 6, gaps among the two adjacent blade parts 112, the guide parts 113 and the positioning ring 114 are convenient for discharging heat generated during rotor rotation, and simultaneously air blowing and heat dissipation are carried out on other components at one end of the shaft core 6.
Referring to fig. 5, a plurality of lightening holes 12 are formed at one end of the fixing portion 111 away from the guiding portion 113, the lightening holes 12 are uniformly distributed around the axial line of the fixing portion 111, and the lightening holes 12 are arranged so as to reduce the weight of the fan blades 11 on the premise of guaranteeing the heat dissipation effect of the fan blades 11, thereby reducing the overall weight of the brushless motor after assembly, and enhancing the applicability of the motor.
In addition, referring to fig. 4 and 6, the fan blade 11 is coaxially and fixedly assembled to the shorter end of the shaft core 6, and simultaneously, a balancing piece 13 is coaxially and fixedly installed at the other end of the shaft core 6, i.e. the longer end of the shaft core 6, so that the fixing portion 111 of the fan blade 11 and the balancing piece 13 respectively abut against the two ends of the rotor core 7, thereby further ensuring the stability of the shaft core 6 during rotation. The material of the balancing piece 13 is selected to be plastic, the balancing piece 13 is in a boss ladder shape, one end of the balancing piece 13 facing the rotor core 7 is provided with a plurality of weight ports 14 which are uniformly distributed around the circumference of the axis of the balancing piece, and in the embodiment of the application, the number of the weight ports 14 is four, so that the weight ports 14 with different sizes can be conveniently processed according to different weight demands, and the applicability is enhanced. The two bearings 18 are pressed and fixed to the shaft core 6 and are respectively located on the sides of the fan blades 11 and the balance piece 13 away from each other. Two bearings 18 are respectively arranged near the fan blade 11 and the balance piece 13.
S6: assembling a motor; one end of the shaft core 6 far away from the fan blade 11 is placed in the winding frame, the rear cover 30 is mounted to one end of the shaft core 6 close to the fan blade 11, the front cover 5 and the rear cover 30 are fixed through screws, and the rear heat dissipation hole 15 penetrating through the front cover 5 is formed in one end of the rear cover 30 far away from the front cover 5.
Referring to fig. 6, in particular, four screws for fixing the front cover 5 and the rear cover 30 are provided, and a plurality of rear heat dissipation holes 15 are uniformly distributed around the axial circumference of the rear cover 30, so that stable heat dissipation of other components is achieved through rotation of the fan blades 11 while the structural strength of the rear cover 30 is ensured. The front cover 5 and the rear cover 30 are respectively provided with a bearing mounting hole 16 penetrating the front cover along the axis, the hole walls of the bearing mounting holes 16 are respectively and fixedly connected with abutting strips 17, the front cover 5 and the rear cover 30 are fixed by screws, the rear two bearings 18 are respectively positioned in the two bearing mounting holes 16, and the abutting strips 17 in the two bearing mounting holes 16 respectively abut against the two bearings 18, so that the position stability of the bearings 18 is further ensured.
Referring back to fig. 1, the outer peripheral surface of the rear cover 30 is provided with a plurality of rear air passing holes 19 distributed around the axis of the rear cover and penetrating through the rear air passing holes so as to rapidly dissipate heat generated in the rotation process of the rotor through the rotation of the fan blades 11. The rear cover 30 and the front cover 5 are provided with gaps after being installed, and the portions of the stator core 3, which are positioned between the rear cover 30 and the front cover 5, are coated with rust-proof oil, so that the stator core 3 is not easy to rust, and the service life of the stator core 3 is further ensured.
In addition, referring to fig. 6, the rear cover 30 is integrally and fixedly connected with four clamping strips 20 extending along the axis direction of the rear cover, clamping grooves 21 are formed between two adjacent clamping strips 20, each clamping groove 21 is respectively arranged in one-to-one correspondence with each limiting groove 4, the rear cover 30 is fixedly connected with a plurality of hooks 22 circumferentially distributed around the axis of the rear cover 30, in the embodiment of the application, the number of the hooks 22 is four, the clamping strips 20 are arranged to facilitate further limiting of enameled wires accommodated in the limiting grooves 4, and the hooks 22 are arranged to facilitate hooking limiting of other connecting wires.
S7: assembling a control module; two PCB boards constituting the control module are mounted to one end of the rear cover 30 remote from the front cover 5.
With continued reference to fig. 6, specifically, two PCB boards are respectively set to a first PCB board 23 and a second PCB board 24, the first PCB board 23 is close to the fan blade 11, the second PCB board 24 is located at one side of the first PCB board 23 far away from the fan blade 11, the second PCB board 24 is fixedly mounted on the rear cover 30 through two screws, the rear cover 30 is integrally connected with two gear parts 25, the first PCB board 23 is provided with two gear notches 26 corresponding to the two gear parts 25, and the two gear parts 25 are located in the two gear notches 26 and abut against the first PCB board 23, thereby being beneficial to fully guaranteeing the position stability of the first PCB board 23. For being convenient for install first PCB board 23 to the assigned position fast, one side fixedly connected with two spacing portions 31 of back lid 30 towards first PCB board 23, two spacing portions 31 are the rectangle with two keep off position portion 25 and distribute, one of them spacing portion 31 is kept away from the one end fixedly connected with location portion 32 of back lid 30, the one end that back lid 30 was kept away from to location portion 32 is provided with the fillet, the locating hole 33 that runs through the setting has been seted up to first PCB board 23, location portion 32 and locating hole 33 grafting cooperation, when location portion 32 grafting cooperation was in locating hole 33, first PCB board 23 is contradicted in two spacing portions 31, in order to play the limiting displacement to the position that first PCB board 23 is located.
Referring to fig. 1 and 6, the second PCB 24 is connected with the first PCB 23 through a welding pin, the encoder 27 is installed on one side of the second PCB 24 far away from the first PCB 23, and the heat dissipation aluminum sheet 28 is fixedly connected on one side of the second PCB 24 far away from the first PCB 23, so that when the fan blade 11 blows and dissipates heat to the first PCB 23 through the rear heat dissipation hole 15, the heat dissipation aluminum sheet 28 is convenient for rapidly realizing heat dissipation treatment to the first PCB 23 by forced convection under the premise of ensuring the usability of the control module.
The implementation principle of the brushless motor processing technology for the electric drill provided by the embodiment of the application is as follows: the control module and the motor module of the brushless motor can be integrally assembled, the assembled motor is mounted to the mounting position of the shell during mounting, the operation is simple and convenient, the mounting efficiency of the motor is improved, meanwhile, the integrated arrangement is beneficial to simplifying wiring and saving the mounting space; in addition, the fan blade 11 rotates and can absorb heat generated when the shaft core 6 drives the rotor core 7 to rotate, and the first PCB 23 of the control module can be subjected to air blowing and heat dissipation treatment, so that the running stability of the motor is further guaranteed, the split treatment of the upper wire frame 1 and the lower wire frame 2 is also convenient for realizing the assembly of the winding frame and the stator core 3, and the cooperation of the limiting groove 4 and the clamping groove 21 is convenient for induction arrangement of enameled wires.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (10)
1. A brushless motor processing technology for an electric drill is characterized in that: the method comprises the following steps:
s1: assembling a stator;
the winding frame comprises an upper wire frame (1) and a lower wire frame (2), the upper wire frame (1) and the lower wire frame (2) are respectively inserted into two sides of a stator core (3), and the assembled winding frame is wound with enameled wires to form a stator;
s2: treating enameled wires;
the wound enameled wires are provided with three groups, the three groups of wound enameled wires are cut, and then the end parts of the cut enameled wires are subjected to paint removal treatment;
s3: the front cover is installed;
the front cover (5) is arranged at one end of the upper wire frame (1) far away from the lower wire frame (2);
s4: assembling a rotor;
the shaft core (6) and the rotor core (7) are coaxially and fixedly assembled, the rotor core (7) is provided with a plurality of mounting grooves (8) which are arranged in a penetrating manner, magnets (9) are arranged in the mounting grooves (8), and the magnets (9) are glued and fixed after being leveled with the end face of the rotor core (7);
s5: assembling fan blades;
coaxially and fixedly assembling the fan blades (11) to the shaft core (6), and then assembling bearings (18) at two ends of the shaft core (6);
s6: assembling a motor;
one end of the shaft core (6) far away from the fan blade (11) is placed in the winding frame, the rear cover (30) is mounted to one end of the shaft core (6) close to the fan blade (11), the front cover (5) and the rear cover (30) are fixed through screws, and a rear radiating hole (15) penetrating through the rear cover is formed in one end of the rear cover (30) far away from the front cover (5);
s7: assembling a control module;
two PCB boards forming the control module are mounted to one end of the rear cover (30) far away from the front cover (5).
2. The brushless motor processing process for an electric drill according to claim 1, wherein: the upper wire frame (1) in the S1 step comprises an upper frame body (101) and an upper connecting part (102) fixedly connected to the upper frame body (101), wherein three limiting grooves (4) penetrating through the upper frame body (101) along the axial direction are formed in one side, far away from the upper frame body (101), of the upper connecting part (102).
3. A brushless motor processing process for an electric drill according to claim 2, wherein: in the step S2, two enameled wires are arranged in each group, one group of enameled wires close to the upper connecting part (102) is cut to 50-55 mm, and the other two groups of enameled wires are cut to 75-mm-80 mm; after the wire stripping treatment, the two groups of wires far from the upper connection part (102) are twisted for 2-4 turns.
4. A brushless motor processing process for an electric drill according to claim 2, wherein: in the step S6, the rear cover (30) is fixedly connected with four clamping strips (20) extending along the axis direction of the rear cover, clamping grooves (21) are formed between two adjacent clamping strips (20), the clamping grooves (21) are respectively arranged in one-to-one correspondence with the limiting grooves (4), and the rear cover (30) is fixedly connected with a plurality of hooks (22) circumferentially distributed around the axis of the rear cover.
5. The brushless motor processing process for an electric drill according to claim 1, wherein: the fan blade (11) in the S5 step comprises a fixing portion (111), a blade portion (112), a guide portion (113) and a positioning ring (114), wherein the fixing portion (111) is cylindrical, a fixing hole (29) penetrating through the fixing portion (111) along the axis direction is formed in one end of the fixing portion (111), the shaft core (6) is in interference fit with the fixing hole (29), the guide portion (113) is in a horn shape with an opening at one end gradually enlarged, one end with a smaller opening of the guide portion (113) is integrally connected to one end of the fixing portion (111), the blade portion (112) is in a flat plate shape, the blade portion (112) is integrally connected to the outer peripheral surface of the guide portion (113) and is circumferentially distributed around the axis of the guide portion (113), the inner diameter of the positioning ring (114) is larger than the diameter of the fixing portion (111), and one sides, far away from the guide portion (113), of the blade portion (112) are fixedly connected to the positioning ring (114).
6. The electric drill brushless motor processing technology according to claim 5, wherein: one end of the fixing part (111) far away from the guide part (113) is provided with a plurality of lightening holes (12), and the lightening holes (12) are circumferentially distributed around the axis of the fixing part (111).
7. The brushless motor processing process for an electric drill according to claim 1, wherein: and S5, coaxially and fixedly assembling the fan blade (11) to one end of the shaft core (6), and coaxially and fixedly installing the balance piece (13) to the other end of the shaft core (6), so that the fan blade (11) and the balance piece (13) respectively abut against two ends of the rotor core (7).
8. The brushless motor processing process for an electric drill according to claim 1, wherein: the number of the mounting grooves (8) and the magnets (9) in the S4 is four, the mounting grooves (8) and the magnets (9) are uniformly distributed along the circumferential direction of the axis of the rotor core (7), two groups of overflow holes (10) penetrating the rotor core (7) are formed in one end of the rotor core, and the two groups of overflow holes (10) are respectively located in and out of the area surrounded by the mounting grooves (8).
9. The brushless motor processing process for an electric drill according to claim 1, wherein: two PCB boards in S7 are set to first PCB board (23) and second PCB board (24) respectively, first PCB board (23) are close to flabellum (11) setting, second PCB board (24) are located one side that flabellum (11) were kept away from to first PCB board (23), second PCB board (24) are connected with first PCB board (23) through welding the row needle, one side fixedly connected with heat dissipation aluminum sheet (28) of first PCB board (23) orientation flabellum (11).
10. The brushless motor processing process for an electric drill according to claim 1, wherein: in the step S6, a plurality of rear air passing holes (19) penetrating through the rear cover (30) are formed in the peripheral surface of the rear cover (30), gaps are formed between the rear cover (30) and the front cover (5), and rust-preventive oil is coated on the part, located between the rear cover (30) and the front cover (5), of the stator core (3).
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| US20130207491A1 (en) * | 2010-06-14 | 2013-08-15 | Black & Deckder Inc. | Stator assembly for a brushless motor in a power tool |
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| CN208691028U (en) * | 2018-09-21 | 2019-04-02 | 中创机电科技(深圳)有限公司 | A kind of brushless motor stator structure |
| WO2021109322A1 (en) * | 2019-12-03 | 2021-06-10 | 深圳市中驱电机有限公司 | Wind motor with ultrahigh rotation speed |
| WO2021258497A1 (en) * | 2020-06-22 | 2021-12-30 | 东莞市力辉马达有限公司 | Improved flat series excited machine |
| WO2022262787A1 (en) * | 2021-06-17 | 2022-12-22 | 格力博(江苏)股份有限公司 | Brushless dc motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130207491A1 (en) * | 2010-06-14 | 2013-08-15 | Black & Deckder Inc. | Stator assembly for a brushless motor in a power tool |
| CN105337449A (en) * | 2014-06-23 | 2016-02-17 | 苏州科沃斯商用机器人有限公司 | Direct-current permanent-magnet brushless motor |
| CN208691028U (en) * | 2018-09-21 | 2019-04-02 | 中创机电科技(深圳)有限公司 | A kind of brushless motor stator structure |
| WO2021109322A1 (en) * | 2019-12-03 | 2021-06-10 | 深圳市中驱电机有限公司 | Wind motor with ultrahigh rotation speed |
| WO2021258497A1 (en) * | 2020-06-22 | 2021-12-30 | 东莞市力辉马达有限公司 | Improved flat series excited machine |
| WO2022262787A1 (en) * | 2021-06-17 | 2022-12-22 | 格力博(江苏)股份有限公司 | Brushless dc motor |
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| CN117040223B (en) | 2024-04-16 |
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