CN110601386A - High-torque brushless motor - Google Patents

High-torque brushless motor Download PDF

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Publication number
CN110601386A
CN110601386A CN201910894611.8A CN201910894611A CN110601386A CN 110601386 A CN110601386 A CN 110601386A CN 201910894611 A CN201910894611 A CN 201910894611A CN 110601386 A CN110601386 A CN 110601386A
Authority
CN
China
Prior art keywords
stator
end cover
end cap
stator core
grooves
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201910894611.8A
Other languages
Chinese (zh)
Inventor
李成志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Smart Electric Technology Co Ltd
Original Assignee
Hangzhou Smart Electric Technology Co Ltd
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
Application filed by Hangzhou Smart Electric Technology Co Ltd filed Critical Hangzhou Smart Electric Technology Co Ltd
Priority to CN201910894611.8A priority Critical patent/CN110601386A/en
Publication of CN110601386A publication Critical patent/CN110601386A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • 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
    • 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
    • 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
    • H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
    • 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

Abstract

The invention discloses a high-torque brushless motor which comprises a stator, wherein the stator comprises a stator core, the stator core comprises a plurality of stator punching sheets, locking screws, a first end cover and a second end cover, grooves are formed in the stator punching sheets, the locking screws lock the stator punching sheets to form the stator core, the grooves are matched to form matching grooves matched with the locking screws after the stator punching sheets are locked by the locking screws, through holes for the locking screws to penetrate through are formed in the first end cover, screw holes matched with the locking screws are formed in the second end cover, and the first end cover and the second end cover are matched with the locking screws to lock the stator core. The invention aims at solving the problems that the existing motor stator iron core is unreasonable in fixing structure and the like. The invention has the advantages of cost saving, high assembly efficiency, high reliability, good stability, strong applicability and the like.

Description

High-torque brushless motor
Technical Field
The invention relates to the technical field of motors, in particular to a high-torque brushless motor.
Background
The motor is generally referred to as an electric motor, is a common power device, and is widely applied in the prior art. The motor is generally classified into a brush motor and a brushless motor, and the brushless motor has more stable performance than the brush motor, and the brushless motor is easy to maintain and widely used.
Brushless motor includes stator and rotor, and the rotor is for the rotatory output power of stator, and the stator includes stator core and around arranging the winding on the stator core in, and stator core includes the stator towards the piece, and the stator is folded towards the piece and is pressed formation stator core, for making stator core stable in structure, generally adopts the bolt fastening to the stator towards the piece among the prior art to make stator core stable in structure. The fixing scheme enables the bolts to penetrate through the stator punching sheet, has certain influence on the performance of the stator iron core and further influences the performance of the motor.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a high-torque brushless motor so as to solve the technical problems that the fixing structure of a motor stator core in the prior art is unreasonable and the like.
The invention is realized by the following technical scheme: the invention discloses a high-torque brushless motor, which comprises a stator, wherein the stator comprises a stator core, and the stator core comprises:
the stator punching sheets are provided with grooves;
the locking screw locks the stator punching sheet to form the stator core;
after the stator punching sheets are locked by the locking screws, the grooves are matched to form matching grooves matched with the locking screws;
the stator further includes:
the first end cover is provided with a through hole for the locking screw to pass through;
the second end cover is provided with a screw hole matched with the locking screw;
and the first end cover and the second end cover are matched with the locking screw to lock the stator core.
Preferably, the stator punching sheet further comprises:
a first convex portion;
the first convex part and the second convex part are protruded along the radial direction of the stator punching sheet, the first convex part and the second convex part are matched to form the groove, and the first convex part and the second convex part and the stator punching sheet are of an integrated structure;
the third convex part protrudes along the radial direction of the stator punching sheet, and the third convex part and the stator punching sheet are of an integrated structure;
the stator core further comprises a heat dissipation rib, and the heat dissipation rib is formed by laminating the third convex parts.
Preferably, the first end cover and the second end cover each include a cavity for accommodating the stator core, and a part of the stator core extends into the cavity.
Preferably, the first end cover is provided with heat dissipation holes, the heat dissipation holes are uniformly distributed on the first end cover, and the heat dissipation holes are communicated with the cavity.
Preferably, the first end cover and the second end cover are both provided with positioning grooves, and the positioning grooves comprise a first groove body and a second groove body;
a portion of the first protrusion and a portion of the second protrusion are located within the first slot;
and a part of the heat dissipation ribs are positioned in the second groove body.
Preferably, the locking screw includes:
the nail head is arranged between the nail head and the first end cover;
the nail rod is sleeved with the elastic gasket, the nail head and the nail rod are of an integrated structure, the nail rod comprises a polished rod part and a screw rod part, the polished rod part and the screw rod part are coaxially arranged, and the length of the screw rod part is not less than one half of the length of the nail rod.
Preferably, the depth of the groove is not less than the depth of the nail rod, and the width of the groove is greater than the diameter of the nail rod.
Preferably, be provided with on the first end cover and hold the groove of stepping down of pin fin first end cover with all be provided with the increase on the second end cover stator core and external area of contact's breach of stepping down, the breach of stepping down is followed the radial of cavity runs through respectively first end cover with the second end cover.
Preferably, the grooves are uniformly distributed on the circumference of the stator punching sheet, the number of the grooves is not less than four, and the number of the grooves on the same stator punching sheet is an even number.
Preferably, the first end cover and the second end cover are both provided with a convex rib, the cross section of the convex rib is semicircular, the through hole is formed in the convex rib positioned on the first end cover, and the screw hole is formed in the convex rib positioned on the second end cover.
The invention discloses a high-torque brushless motor, which is compared with the prior art:
according to the invention, the stator punching sheet can be fixed by utilizing the first end cover and the second end cover without punching holes on the stator punching sheet, the scheme can not influence the performance of the stator core, and further can not influence the performance of the motor.
The groove is formed by matching the first convex part and the second convex part, and the first convex part and the second convex part protrude out of the stator punching sheet.
The invention has the advantages of cost saving, high assembly efficiency, high reliability, good stability, strong applicability and the like.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
fig. 2 is a schematic perspective structure view of a stator punching sheet;
FIG. 3 is a front view of the present invention;
FIG. 4 is a cross-sectional view of the present invention;
1. a stator core; 2. stator punching sheets; 21. a first convex portion; 22. a second convex portion; 23. a third convex portion; 24. heat dissipation ribs; 3. locking the screw; 31. a nail head; 32. a nail rod; 321. a light bar section; 322. a screw section; 4. a groove; 5. a mating groove; 6. a first end cap; 61. heat dissipation holes; 7. a second end cap; 8. a cavity; 9. a first tank body; 10. a second tank body; 11. a abdication gap; 12. and (5) convex ribs.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
Example 1
Embodiment 1 discloses a high torque brushless motor, referring to fig. 1, 2, 3, and 4, including a stator core 1, the stator core 1 including:
the stator punching sheets 2 are all provided with grooves 4;
the locking screw 3 locks the stator punching sheet 2 to form a stator core 1;
the stator punching sheets 2 are locked by the locking screws 3, and the grooves 4 are matched to form matching grooves 5 matched with the locking screws 3;
all stator punching sheets 2 are overlapped to form a stator core 1, grooves 4 on the stator punching sheets 2 are matched to form matching grooves 5 after the stator punching sheets 2 are overlapped, namely the grooves 4 on two adjacent stator punching sheets 2 correspond to each other to form matching grooves 5 penetrating through the stator core 1, and the matching grooves 5 are matched with the locking screws 3.
The stator further includes:
the first end cover 6 is provided with a through hole for the locking screw 3 to pass through;
the second end cover 7 is provided with a screw hole matched with the locking screw 3;
the first end cap 6 and the second end cap 7 cooperate with the locking screw 3 to lock the stator core 1.
The stator punching sheets 2 forming the stator core 1 in the prior art need to be punched, bolt holes penetrating bolts are formed after the stator punching sheets 2 are laminated, and all the stator punching sheets 2 are locked by the bolts to form the stator core 1. The bolt in the scheme needs to penetrate into the stator punching sheet 2, on one hand, the stator punching sheet 2 needs to be punched, and the stator punching sheet 2 is difficult to process; on the other hand, because need punch on stator punching sheet 2, the relative position requirement to two adjacent stator punching sheets 2 is higher to avoid the hole body to stagger each other and cause the unable assembly of bolt. This kind of scheme has just caused stator towards piece 2 processing difficulty and processing cost height, in addition, because the bolt adopts different materials with stator towards piece 2, the bolt wears to locate in stator towards piece 2, has certain influence to stator towards piece 2's performance, and then influences stator core 1's performance.
In the embodiment, the groove 4 is formed in the stator punching sheet 2, the groove 4 is open, and the matching groove 5 formed by the groove 4 is also open, so that the stator punching sheet 2 can be matched with the locking screw 3 without punching, on one hand, the assembly of the stator punching sheet 2 and the manufacture of the stator punching sheet 2 are easy, and the stator punching sheet 2 has lower processing cost; on the other hand, the locking screw 3 is easily matched with the assembling groove, and the assembling efficiency of the stator core 1 is improved. The locking of the stator punching sheet 2 can be realized without the locking screw 3 being completely positioned in the stator core 1, so that the influence of the locking screw 3 on the performance of the stator core 1 is reduced, the performance of the high-torque brushless motor is further optimized, and particularly, the center deviation between the stator and the motor can not occur under the condition of high load, so that the high-torque brushless motor has high reliability and high stability;
the arrangement of the first end cover 6 and the second end cover 7 further simplifies the structure of the stator punching sheet 2, namely the stator punching sheet can be assembled with the locking screw 3 without arranging threads in the groove 4; the structure of high moment of torsion brushless motor can be simplified in the setting of first end cover 6 and second end cover 7, and first end cover 6 and second end cover 7 can regard as high moment of torsion brushless motor's casing to use promptly, have reduced high moment of torsion brushless motor's processing cost, because stator core 1 has great area of contact with the air, have improved high moment of torsion brushless motor's radiating efficiency, and then have prolonged high moment of torsion brushless motor's life.
As the preferable mode, referring to fig. 1 and 2, the stator lamination 2 further includes:
the first convex portion 21;
the first convex part 21 and the second convex part 22 are protruded along the radial direction of the stator punching sheet 2, the first convex part 21 and the second convex part 22 are matched to form a groove 4, and the first convex part 21 and the second convex part 22 and the stator punching sheet 2 are of an integrated structure;
the third convex part 23 protrudes along the radial direction of the stator punching sheet 2, and the third convex part 23 and the stator punching sheet 2 are of an integrated structure;
the stator core 1 further includes heat dissipation ribs 24, and the heat dissipation ribs 24 are formed by laminating the third protrusions 23.
The groove 4 is formed by matching the first convex part 21 and the second convex part 22, so that the structure of the stator punching sheet 2 is simplified; the first convex part 21 and the second convex part 22 are arranged to increase the contact area of the stator punching sheet 2 and air, so as to facilitate the heat dissipation of the stator, and the third convex part 23 forms a heat dissipation rib 24 to mainly play a role in dissipating heat of the stator core 1; on the other hand, the cooperation of heat dissipation muscle 24 and first end cover 6 and second end cover 7 still plays the function of location stator punching 2, and stator core 1 is difficult to rotatory for first end cover 6 and second end cover 7 promptly, has improved the stability ability in the high moment of torsion brushless motor working process.
The stator punching sheet 2 is provided with the groove 4, so that the assembly of the stator punching sheet 2 is facilitated, and the stator assembly efficiency is high. In addition, locking screw 3 and recess 4 cooperation, stator punching 2 fold and press the quantity unrestricted, can conveniently adjust the quantity of stator punching 2 to adjust high moment of torsion brushless motor's power, this structure can be applicable to powerful brushless motor.
As above-mentioned preferred scheme, refer to fig. 3 and 4, first end cover 6 and second end cover 7 all include the cavity 8 of holding stator core 1, and partly stator core 1 extends to in the cavity 8, set up like this and can optimize stator core 1's heat dispersion and make stator core 1 location firm when, have improved high moment of torsion brushless motor's stability can.
High moment of torsion brushless motor wholeness can be stable simultaneously, and the stator includes first end cover 6 and second end cover 7, and first end cover 6 and second end cover 7 have the function of casing, and under the high load operating mode, the stator can not take place the central deviation with the casing. In addition, the first end cap 6 and the second end cap 7 have the function of a housing, so that the structure of the high-torque brushless motor is simplified, and the manufacturing cost of the high-torque brushless motor is reduced.
As the preferable scheme, referring to fig. 1 and 3, the first end cap 6 is provided with heat dissipation holes 61, the heat dissipation holes 61 are uniformly distributed on the first end cap 6, and the heat dissipation holes 61 are communicated with the cavity 8.
The shape and the number of the heat dissipation holes 61 are not limited, the heat dissipation holes 61 mainly play a heat dissipation function, and the heat dissipation holes 61 also play a role in reducing the manufacturing cost of the first end cover 6, so that the manufacturing cost of the high-torque brushless motor is reduced.
As the preferable scheme, referring to fig. 1, the first end cover 6 and the second end cover 7 are both provided with positioning grooves, and the positioning grooves include a first groove body 9 and a second groove body 10;
a part of the first convex part 21 and a part of the second convex part 22 are positioned in the first groove body 9;
a part of the heat dissipating ribs 24 is located in the second tank 10.
The arrangement of the first slot body 9 and the second slot body 10 is mainly used for positioning the stator core 1 and preventing the stator core 1 from rotating relative to the first end cover 6 and the second end cover 7, so that the performance of the high-torque brushless motor is optimized, and the reliability and the stability of the high-torque brushless motor are improved;
as the preferable mode, referring to fig. 1, the locking screw 3 includes:
the nail head 31, an elastic gasket is arranged between the nail head 31 and the first end cover 6; the elastic gasket is arranged to play a role in preventing looseness.
The nail rod 32 is sleeved with the elastic gasket, the nail head 31 and the nail rod 32 are of an integrated structure, the nail rod 32 comprises a polished rod part 321 and a screw rod part 322, the polished rod part 321 and the screw rod part 322 are coaxially arranged, and the length of the screw rod part 322 is not less than one half of the length of the nail rod 32.
Screw rod portion 322 has longer length for locking screw 3 can adapt to the stator core 1 of different length, and after the length adjustment of stator core 1, locking screw 3 still can lock stator towards piece 2, has optimized locking screw 3's performance.
As the preferable proposal, the depth of the groove 4 is not less than the depth of the nail rod 32, and the width of the groove 4 is more than the diameter of the nail rod 32.
The width of the recess 4 should be greater than the diameter of the shank 32, in view of assembly requirements. The shank 32 may be located entirely within the recess 4 or only a portion of the shank 32 may be located within the recess 4.
As the preferable scheme, referring to fig. 1, the first end cap 6 is provided with a relief groove for accommodating the nail head 31, the first end cap 6 and the second end cap 7 are both provided with relief notches 11 for increasing the contact area between the stator core 1 and the outside, and the relief notches 11 respectively penetrate through the first end cap 6 and the second end cap 7 along the radial direction of the cavity 8. The arrangement of the abdicating notch 11 is mainly used for heat dissipation.
As the above preferred scheme, referring to fig. 2, the grooves 4 are uniformly distributed on the circumference of the stator punching sheet 2, the number of the grooves 4 is four, and the number of the grooves 4 on the same stator punching sheet 2 is an even number.
The quantity one-to-one of recess 4 and locking screw 3, the quantity of recess 4 is even number, and this scheme makes stator core 1 atress even, and when locking screw 3 locked stator punching 2, stator core 1 bore locking effort of locking screw 3 even, and stator core 1 is difficult to damage.
The larger the diameter of the stator core 1 is, the more the corresponding number of the grooves 4 should be provided to improve the stability of the stator core 1.
As the preferable scheme, referring to fig. 1, the first end cap 6 and the second end cap 7 are both provided with a convex rib 12, the cross section of the convex rib 12 is semicircular, the through hole is formed in the convex rib 12 on the first end cap 6, and the screw hole is formed in the convex rib 12 on the second end cap 7.
The setting of protruding muscle 12 mainly plays the function of assembling locking screw 3, sets up protruding muscle 12 and makes the diameter of first end cover 6, second end cover 7 need not to set up too big can with locking screw 3 cooperation, has reduced the manufacturing cost of first end cover 6 and second end cover 7.
The embodiment has the advantages of cost saving, high assembly efficiency, high reliability, good stability, strong applicability and the like.

Claims (10)

1. A high-torque brushless motor comprising a stator, wherein the stator comprises a stator core, the stator core comprising:
the stator punching sheets are provided with grooves;
the locking screw locks the stator punching sheet to form the stator core;
after the stator punching sheets are locked by the locking screws, the grooves are matched to form matching grooves matched with the locking screws;
the stator further includes:
the first end cover is provided with a through hole for the locking screw to pass through;
the second end cover is provided with a screw hole matched with the locking screw;
and the first end cover and the second end cover are matched with the locking screw to lock the stator core.
2. The high torque brushless electric machine of claim 1, wherein the stator lamination further comprises:
a first convex portion;
the first convex part and the second convex part are protruded along the radial direction of the stator punching sheet, the first convex part and the second convex part are matched to form the groove, and the first convex part and the second convex part and the stator punching sheet are of an integrated structure;
the third convex part protrudes along the radial direction of the stator punching sheet, and the third convex part and the stator punching sheet are of an integrated structure;
the stator core further comprises a heat dissipation rib, and the heat dissipation rib is formed by laminating the third convex parts.
3. The high torque brushless electric machine of claim 1, wherein the first end cap and the second end cap each include a cavity that receives the stator core, a portion of the stator core extending into the cavity.
4. The high torque brushless motor of claim 1, wherein the first end cap is provided with heat dissipation holes, the heat dissipation holes are uniformly distributed on the first end cap, and the heat dissipation holes are communicated with the cavity.
5. The high-torque brushless motor according to claim 3 or 4, wherein the first end cover and the second end cover are both provided with positioning grooves, and the positioning grooves comprise a first groove body and a second groove body;
a portion of the first protrusion and a portion of the second protrusion are located within the first slot;
and a part of the heat dissipation ribs are positioned in the second groove body.
6. The high torque brushless motor of claim 1, wherein the locking screw comprises:
the nail head is arranged between the nail head and the first end cover;
the nail rod is sleeved with the elastic gasket, the nail head and the nail rod are of an integrated structure, the nail rod comprises a polished rod part and a screw rod part, the polished rod part and the screw rod part are coaxially arranged, and the length of the screw rod part is not less than one half of the length of the nail rod.
7. The high torque brushless electric motor of claim 6, wherein the depth of the recess is not less than the depth of the shank, and the width of the recess is greater than the diameter of the shank.
8. The high torque brushless motor of claim 7, wherein the first end cap is provided with a recess for receiving the pin head, and the first end cap and the second end cap are both provided with a recess for increasing a contact area between the stator core and the outside, and the recess penetrates the first end cap and the second end cap along a radial direction of the cavity.
9. The high-torque brushless motor of claim 7, wherein the grooves are uniformly distributed on the circumference of the stator lamination, the number of the grooves is not less than four, and the number of the grooves on the same stator lamination is even.
10. The high torque brushless motor of claim 7, wherein the first end cap and the second end cap each have a rib, the rib has a semicircular cross-sectional shape, the through hole is formed in the rib on the first end cap, and the screw hole is formed in the rib on the second end cap.
CN201910894611.8A 2019-09-20 2019-09-20 High-torque brushless motor Pending CN110601386A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910894611.8A CN110601386A (en) 2019-09-20 2019-09-20 High-torque brushless motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910894611.8A CN110601386A (en) 2019-09-20 2019-09-20 High-torque brushless motor

Publications (1)

Publication Number Publication Date
CN110601386A true CN110601386A (en) 2019-12-20

Family

ID=68862005

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910894611.8A Pending CN110601386A (en) 2019-09-20 2019-09-20 High-torque brushless motor

Country Status (1)

Country Link
CN (1) CN110601386A (en)

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