CN104393733B - Integral high-speed permanent-magnet brushless direct-current motor for electric tool - Google Patents
Integral high-speed permanent-magnet brushless direct-current motor for electric tool Download PDFInfo
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- CN104393733B CN104393733B CN201410727166.3A CN201410727166A CN104393733B CN 104393733 B CN104393733 B CN 104393733B CN 201410727166 A CN201410727166 A CN 201410727166A CN 104393733 B CN104393733 B CN 104393733B
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Abstract
The invention discloses an integral high-speed permanent-magnet brushless direct-current motor for an electric tool, and the motor comprises a rotor and a stator sleeved outside the rotor, wherein front and rear ends of the rotor and stator are respectively provided with a front end cover and a rear end cover, a screw passes through the front end cover and the rear end cover and fits with nuts to integrally assemble the rotor, the stator, the front end cover and the rear end cover, and a fan blade is arranged outside the rear end cover or the front end cover and connected with the rotor to be together rotated. The motor has the advantages of simple process, easy assembly, excellent cooling effect, steady operation and long service life, and a solenoid coil cannot be in short circuit due to being damaged.
Description
Technical field
The present invention relates to a kind of permanent-magnet brushless DC electric machine, particularly relate to a kind of high speed for electric tool overall
Formula permanent-magnet brushless DC electric machine.
Background technology
Brshless DC motor has efficiency height due to it, and noise is low, and the life-span is long, and safety is high, environmental protection etc.
Advantage, has in industry and civil area and is widely applied very much.But, in existing technology, brushless, permanently
The rotating speed of direct current generator is the most relatively low, and the brshless DC motor rotation speed requirements of electric tool is high.And it is electronic
The brshless DC motor of instrument all uses split-type structural, stator to be placed in casing with the location of rotor, this
Plant Standard trouble, it is desirable to technique is high, expensive.In addition motor is in running up, it may occur that stator
Wiping with rotor is touched, the as easy as rolling off a log associative perception affecting electric tool and stability.
Summary of the invention
It is an object of the present invention to provide the permanent-magnet brushless DC electric machine of a kind of monolithic construction.
In order to solve above-mentioned technical problem, the technical scheme is that and provide a kind of height for electric tool
Speed whole permanent magnetic brshless DC motor, including rotor and the stator that is set in outside rotor, it is characterised in that
Being respectively arranged at two ends with drive end bearing bracket and rear end cap before and after rotor and stator, screw rod is joined after drive end bearing bracket and rear end cap
Closing nut and rotor, stator, drive end bearing bracket and rear end cap are assembled into entirety, fan blade is positioned at rear end cap or drive end bearing bracket
Outside, fan blade is connected to rotor to rotate with rotor.
Preferably, described rotor includes the armature spindle rotated, at the middle part of armature spindle equipped with rotor core, rotor
Being provided with many magnets in iron core, the front end of every magnet is exposed to outside the front end face of rotor core, after every magnet
Hold concordant with the rear end face of rotor core, before and after rotor core, be respectively arranged at two ends with magnet fixture and magnet
Keeper, magnet fixture and magnet keeper are set in outside armature spindle, and every magnet is exposed to outside rotor core
Front end is all located in magnet fixture, after magnet keeper is close to rear end face and all magnets of rotor core
End.
Preferably, the middle part of described armature spindle has crush rib.
Preferably, described stator includes the stator core being set in outside described rotor, is wound with many on stator core
Individual solenoid, is respectively arranged at two ends with insulating end plate fixture one and insulating end plate fixture at stator core
Two, insulating end plate fixture one is provided with Hall Plate, insulating end plate fixture one and insulating end plate fixture two
On the end face of stator core, it is respectively formed with extension one and extension two, extension one and extension two stretch
Enter in stator core, the outer circumference surface of insulating end plate fixture one and insulating end plate fixture two is formed respectively
And one to one sheath one and sheath two identical with described screw rod quantity, every described screw rod is respectively from right with it
The sheath one answered and sheath two pass.
Preferably, the height H of described sheath one and sheath two is 3mm to 5mm；Described sheath one and sheath
The limit mouth one of two and limit mouth two the most described insulating end plate fixture one and described insulating end plate fixture two respectively
There is inclination angle.
Preferably, described drive end bearing bracket and described rear end cap are provided with the boss one for described screw rod location and boss two,
Inwall at described drive end bearing bracket and described rear end cap is provided with described near described boss one and boss two position
Boss one and gathering sill one corresponding to described boss 211 and gathering sill two.
Preferably, the width of described sheath one is equal to the width of described gathering sill one；The width etc. of described sheath two
Width in described gathering sill two.
Preferably, described drive end bearing bracket or described rear end cap set there are several air vent one and air vent two respectively.
Preferably, rear end cap is provided with several nut boss, and nut boss is provided with nut position, described nut position
Width is equal to the width of described nut.
Preferably, described fan blade uses shaft flow blade, and the diameter of described fan blade is more than the diameter of described rear end cap.
Preferably, described stator diameter D or be 42mm, or be 47mm, or be 52mm.
Applying the high-speed permanent-magnet brushless direct current generator at electric tool all to use split type at present, this is to cabinet
Axiality requires and motor process requires higher, is not suitable with domestic production environment.High-speed electric expreess locomotive is made whole
Cabinet technology difficulty can be transferred on aluminum component front and rear cover by body formula, it is easy to reaches.Simultaneously in front and back end
Set up chute on lid and stator insulation end plate attachment to coordinate, it is simple to motor assembles；Use magnet fixture permissible
Save rotor core length, and ensure that Hall element can detect signal；Fan blade is placed on outside motor, energy
Expand fan blade diameter；Additionally, due to the only stator of permanent-magnet brushless DC electric machine heating, external fan blade can be simultaneously
Cooling stator inner side and outer side.
The invention have the advantage that technique is simple, easy to assembly, solenoid will not cool down because of damaged short circuit,
Stable, the life-span is long.
Accompanying drawing explanation
Fig. 1 is axonometric chart of the present invention；
Fig. 2 is profile of the present invention；
Fig. 3 is exploded view of the present invention；
Fig. 4 is the axonometric chart of described stator；
Fig. 5 is the axonometric chart of described drive end bearing bracket；
Fig. 6 is the axonometric chart in described rear end cap front；
Fig. 7 is the axonometric chart at the described rear end cap back side.
Detailed description of the invention
For making the present invention become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
The installation chi of a kind of high speed whole permanent magnetic brshless DC motor for electric tool that the present invention provides
Very little and standardized whole permanent magnetic brushed DC motor is identical, and two kinds of motors have interchangeability, are not changing
On the basis of becoming former electric tool product, can be suitably used for the demand of different client, turn including rotor 1 and being set in
Stator 2 outside son 1, it is characterised in that be respectively arranged at two ends with drive end bearing bracket 4 before and after rotor 1 and stator 2
And rear end cap 5, screw rod 6 through attaching nut 7 after drive end bearing bracket 4 and rear end cap 5 by rotor 1, stator 2,
Drive end bearing bracket 4 and rear end cap 5 are assembled into entirety, and fan blade 3 is positioned at rear end cap 5 or the outside of drive end bearing bracket 4, fan blade
3 are connected to rotor 1 to rotate with rotor 1.
Rotor 1 includes the armature spindle 11 rotated, and the middle part of rotor 1 has crush rib 111, at armature spindle 11
Middle part equipped with rotor core 12, be provided with many magnets 13, the front end of every magnet 13 in rotor core 12
Being exposed to outside the front end face of rotor core 12, the rear end of every magnet 13 is concordant with the rear end face of rotor core 12,
Being respectively arranged at two ends with magnet fixture 14 and magnet keeper 15 before and after rotor core 12, magnet is fixed
Part 14 and magnet keeper 15 are set in outside armature spindle 11, and every magnet 13 is exposed to outside rotor core 12
Front end is all located in magnet fixture 14, and magnet keeper 15 is close to the rear end face of rotor core 12 and owns
The rear end of magnet 13, saves silicon steel sheet materials, it is simple to the Hall element detection signal in Hall Plate 25.
Stator 2 includes the stator core 21 being set in outside rotor 1, is wound with multiple electromagnetism on stator core 21
Coil 24, stator core 21 be respectively arranged at two ends with insulating end plate fixture 1 and insulating end plate is fixed
Part 2 23, is provided with Hall Plate 25 on insulating end plate fixture 1, insulating end plate fixture 1 and absolutely
Edge end plate attachment 2 23 is respectively formed with extension 1 and extension on the end face of stator core 21
2 231, extension 1 and extension 2 231 stretch in stator core 21, at insulating end plate fixture
1 and insulating end plate fixture 2 23 outer circumference surface on formed respectively identical with screw rod 6 quantity and one a pair
The sheath 1 answered and sheath 2 232, every screw rod 6 is respectively from corresponding sheath 1 and sheath
Passing in 2 232, sheath 1 and sheath 2 232 can prevent solenoid from contacting with screw rod 6, it is to avoid short
Road and puncturing.
The height H of sheath 1 and sheath 2 232 is 3mm to 5mm, can determining as Hall Plate 25
Position；The limit mouth 1 of sheath 1 and sheath 2 232 and limit mouth 2 233 opposing insulation end plate respectively is fixed
Part 1 and insulating end plate fixture 2 23 have inclination angle, it is ensured that stator 2 can facilitate insertion drive end bearing bracket 4 or
Rear end cap 5；The width of sheath 1 is equal to the width of gathering sill 1；The width of sheath 2 232 is equal to
The width of gathering sill 2 52, can ensure that stator 2 does not occur footpath with drive end bearing bracket 4 or rear end cap 5 during assembling motor
To rotation.
Drive end bearing bracket 4 and rear end cap 5 are provided with the boss 1 for screw rod 6 location and boss 2 51, at drive end bearing bracket
4 and the inwall of rear end cap 5 be provided with and boss 1 and boss near boss 1 and boss 2 51 position
2 51 gathering sill 1 and gathering sills 2 52 one to one.
Drive end bearing bracket 4 or rear end cap 5 set and has several air vent 1 and air vent 2 53 respectively.
Rear end cap 5 is provided with several nut boss 54, and nut boss is provided with nut position 55, described nut position
Width is equal to the width of described nut 7.
Fan blade 3 uses shaft flow blade, and the diameter of fan blade 3 is more than the diameter of rear end cap 5.
Stator 2 diameter D or be 42mm is identical with No. 700 standard permanent-magnet DC brush motor external diameters；Or be
47mm is identical with No. 800 standard permanent-magnet DC brush motor external diameters；Or be 52mm, with No. 900 standards
Permanent-magnet DC brush motor external diameter is identical.
Claims (9)
1. the high speed whole permanent magnetic brshless DC motor for electric tool, including rotor (1) and be set in rotor (1) stator (2) outward, it is characterized in that, drive end bearing bracket (4) and rear end cap (5) it is respectively arranged at two ends with before and after rotor (1) and stator (2), screw rod (6) passes drive end bearing bracket (4) and rear end cap (5) attaching nut afterwards (7) by rotor (1), stator (2), drive end bearing bracket (4) and rear end cap (5) are assembled into entirety, fan blade (3) is positioned at rear end cap (5) or the outside of drive end bearing bracket (4), fan blade (3) is connected to rotor (1) to rotate with rotor (1)；
nullDescribed stator (2) includes being set in described rotor (1) stator core (21) outward，Stator core (21) is wound with multiple solenoid (24)，It is respectively arranged at two ends with insulating end plate fixture one (22) and insulating end plate fixture two (23) at stator core (21)，Insulating end plate fixture one (22) is provided with Hall Plate (25)，Insulating end plate fixture one (22) and insulating end plate fixture two (23) are respectively formed with extension one (221) and extension two (231) on the end face of stator core (21)，Extension one (221) and extension two (231) stretch in stator core (21)，The outer circumference surface of insulating end plate fixture one (22) and insulating end plate fixture two (23) is formed and one to one sheath one (222) and sheath two (232) respectively identical with described screw rod (6) quantity，Every described screw rod (6) passes respectively from corresponding sheath one (222) and sheath two (232).
nullA kind of high speed whole permanent magnetic brshless DC motor for electric tool，It is characterized in that，Described rotor (1) includes the armature spindle (11) rotated，At the middle part of armature spindle (11) equipped with rotor core (12)，Many magnets (13) it are provided with in rotor core (12)，The front end of every magnet (13) is exposed to outside the front end face of rotor core (12)，The rear end of every magnet (13) is concordant with the rear end face of rotor core (12)，Magnet fixture (14) and magnet keeper (15) it is respectively arranged at two ends with before and after rotor core (12)，Magnet fixture (14) and magnet keeper (15) are set in armature spindle (11) outward，Every magnet (13) is exposed to rotor core (12) front end outward and is all located in magnet fixture (14)，Magnet keeper (15) is close to rear end face and the rear end of all magnets (13) of rotor core (12).
A kind of high speed whole permanent magnetic brshless DC motor for electric tool, it is characterised in that the middle part of described armature spindle (11) has crush rib (111).
A kind of high speed whole permanent magnetic brshless DC motor for electric tool, it is characterised in that the height H of described sheath one (222) and sheath two (232) is 3mm to 5mm；Described sheath one (222) and the limit mouth one (223) of sheath two (232) and limit mouth two (233) the most described insulating end plate fixture one (22) and described insulating end plate fixture two (23) respectively have inclination angle.
A kind of high speed whole permanent magnetic brshless DC motor for electric tool, it is characterized in that, described drive end bearing bracket (4) and described rear end cap (5) are provided with for described screw rod (6) boss one (41) that positions and boss two (51), and the inwall at described drive end bearing bracket (4) and described rear end cap (5) is provided with and described boss one (41) and described boss two (51) gathering sill one (42) one to one and gathering sill two (52) near described boss one (41) and boss two (51) position.
A kind of high speed whole permanent magnetic brshless DC motor for electric tool, it is characterised in that the width of described sheath one (222) is equal to the width of described gathering sill one (42)；The width of described sheath two (232) is equal to the width of described gathering sill two (52).
A kind of high speed whole permanent magnetic brshless DC motor for electric tool, it is characterised in that set on described drive end bearing bracket (4) or described rear end cap (5) and have several air vent one (43) and air vent two (53) respectively；Described rear end cap (5) is provided with several nut boss (54), and nut boss is provided with nut position (55), and the width of described nut position is equal to the width of described nut (7).
A kind of high speed whole permanent magnetic brshless DC motor for electric tool, it is characterised in that described fan blade (3) uses shaft flow blade, the diameter of described fan blade (3) is more than the diameter of described rear end cap (5).
A kind of high speed whole permanent magnetic brshless DC motor for electric tool, it is characterised in that described stator (2) diameter D or be 42mm, or be 47mm, or be 52mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410727166.3A CN104393733B (en) | 2014-12-03 | 2014-12-03 | Integral high-speed permanent-magnet brushless direct-current motor for electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410727166.3A CN104393733B (en) | 2014-12-03 | 2014-12-03 | Integral high-speed permanent-magnet brushless direct-current motor for electric tool |
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| Publication Number | Publication Date |
|---|---|
| CN104393733A CN104393733A (en) | 2015-03-04 |
| CN104393733B true CN104393733B (en) | 2017-01-11 |
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| CN201410727166.3A Active CN104393733B (en) | 2014-12-03 | 2014-12-03 | Integral high-speed permanent-magnet brushless direct-current motor for electric tool |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2015397721A1 (en) * | 2015-06-01 | 2017-12-07 | Techtronic Power Tools Technology Limited | Brushless can motor |
| CN106685172A (en) * | 2017-02-10 | 2017-05-17 | 浙江大东吴汽车电机有限公司 | Three-phase permanent magnet external rotor motor and method for assembling stator and rotor |
| CN109227479A (en) * | 2018-11-16 | 2019-01-18 | 上海电动工具研究所（集团）有限公司 | A kind of hand-held brushless direct-current electric hammer |
| EP4012890A4 (en) * | 2020-06-04 | 2022-12-07 | Nanjing Chervon Industry Co., Ltd. | Electric motor and electric tool |
| CN113141074B (en) * | 2021-04-09 | 2023-07-18 | 浙江零跑科技股份有限公司 | Rotor structure of permanent magnet synchronous motor and manufacturing method thereof |
| CN116799991B (en) * | 2023-08-14 | 2024-01-02 | 江苏东成工具科技有限公司 | Outer rotor motor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1725609A (en) * | 2005-06-28 | 2006-01-25 | 任奕彪 | Permanent magnet brushless DC motor |
| CN102468733B (en) * | 2010-11-15 | 2016-06-08 | 德昌电机(深圳)有限公司 | Brushless electric machine |
| CN202513802U (en) * | 2012-04-10 | 2012-10-31 | 周拥军 | Inner rotor motor |
| CN203674947U (en) * | 2013-11-25 | 2014-06-25 | 东莞市瑞科五金塑胶制品有限公司 | Minitype brushless direct current motor |
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