CN200942511Y - Alternating current electric hammer or drill - Google Patents
Alternating current electric hammer or drill Download PDFInfo
- Publication number
- CN200942511Y CN200942511Y CN 200620076934 CN200620076934U CN200942511Y CN 200942511 Y CN200942511 Y CN 200942511Y CN 200620076934 CN200620076934 CN 200620076934 CN 200620076934 U CN200620076934 U CN 200620076934U CN 200942511 Y CN200942511 Y CN 200942511Y
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- CN
- China
- Prior art keywords
- direct current
- motor
- electric
- current generator
- electric hammer
- 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.)
- Expired - Fee Related
Links
- 229910001172 neodymium magnet Inorganic materials 0.000 claims abstract description 45
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical group [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 238000000418 atomic force spectrum Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
An alternating current electric hammer or electric drill. A motor is a neodymium iron boron permanent magnetic direct current motor, and at least a rectifying circuit or analogous rectifying device in the motor changes an alternating current power into a direct current power. The neodymium iron boron permanent magnetic direct current motor in volume and weight is smaller than the original series excited motor. The electric hammer or electric drill of the neodymium iron boron permanent magnetic direct current motor becomes small and portable, more suitable for hand-held operation. The neodymium iron boron permanent magnetic direct current motor also can provide more gradual twisting force curve line of rotation speed than the series excited motor. The change fluctuation of the machine rotation speed following the charge is less; thereby the tool efficiency is improved.
Description
Technical field
The utility model relates to interchange electric hammer or electric drill, and its motor is the Nd-Fe-B permanent magnetic direct current generator, belongs to electric tool manufacturing technology field.
Background technology
Exchange electric hammer, electric drill is widely used in building, decoration, fields such as installation, bring great convenience to construction, along with exchanging electric hammer, constantly extensive its power demand of the application of electric drill is also in continuous lifting, electric hammer power from before 500-600W 800-900W till now, even more than the 1000W, electric drill and electric impact drill rise to 700-800W from 200-400W, what have has reached 1000W, exchange electric hammer at present, the used motor of electric drill all is a series excited machine, series excited machine is by fixed, rotor core and fixed, the rotor winding is formed, the volume of motor becomes big during power ascension, it is heavy that weight becomes, the volume of machine, it is bigger that weight becomes, electric hammer, electric drill all is to carry out operation by the hand-held machine of operator, also can impact during machine works and vibrations etc., excessive, overweight machine can be made troubles to operation, and the operator is easily tired and can have the danger of potential injury to the operator.Series excited machine has softer mechanical property, and promptly rotating speed of motor descends obviously when load increases, operating efficiency when this also can directly influence work.
Summary of the invention
The utility model purpose is the Nd-Fe-B permanent magnetic direct current generator to be applied to exchange on electric hammer, the electric drill, and the smaller volume of machine, weight are lightened, and is more suitable for increasing work efficiency simultaneously in hand-held operation.
The utility model is to take following technical scheme to realize:
Exchange electric hammer or electric drill, mainly comprise main handle, switch, electric capacity, inductance, motor, transmission system, SDS collet system, assist handle etc., described switch is positioned at the main handle inboard, electric capacity is parallel to power supply, inductance is series at power supply, and transmission system is between motor and collet system, and assist handle is near the head of machine, it is characterized in that the motor that it comprises is direct current generator and comprises a rectification circuit that rectification circuit places the direct current generator front end.
Aforementioned interchange electric hammer or electric drill is characterized in that wherein said direct current generator is the Nd-Fe-B permanent magnetic direct current generator.
Aforementioned interchange electric hammer or electric drill, it is characterized in that wherein said Nd-fe-b DC motor comprises rotor, carbon brush and commutator, neodymium iron boron (NdFeB) magnetic tile and steel bushing etc., carbon brush and commutator are the part of rotor, the periphery of rotor is a neodymium iron boron (NdFeB) magnetic tile, neodymium iron boron (NdFeB) magnetic tile is fixed in the steel bushing inner surface, and steel bushing is installed on the casing.
Aforementioned interchange electric hammer or electric drill is characterized in that wherein said direct current generator front end has at least a rectification circuit or similar fairing that AC power is transformed into dc source.
Exchange electric hammer at present, the used motor of electric drill is a series excited machine, AC power enters machine through switch and electromagnetic compatibility components and parts (electric capacity, inductance) back is to motor, series excited machine power arrives workpiece through transmission system, powerful interchange electric hammer, electric drill exists volume bigger, defectives such as weight is heavier, it is not too convenient to operate, for overcoming the existing deficiency of series excited machine, now the Nd-Fe-B permanent magnetic direct current generator is applied to the interchange electric hammer, on the electric drill, it is little that the Nd-Fe-B permanent magnetic direct current generator has a volume, in light weight, little power consumption, advantages such as noise is little, the manufacturing technology of Nd-Fe-B permanent magnetic direct current generator is near ripe, it is used in recent years constantly extensively, new motor adjusts slightly in the rotor of motor and commutator part and gets final product, stationary part substitutes original stator core and winding with volume less neodymium iron boron (NdFeB) magnetic tile and stationary steel bushing, because of Nd-Fe-B permanent-magnet motor is a direct current generator, the AC power that enters behind the machine can convert AC power to dc source by rectification circuit, it is just passable to add a rectification circuit at the motor front end, and other parts such as the transmission of machine can remain unchanged.The Nd-Fe-B permanent magnetic direct current generator can also provide the rotating speed-torque curve mild than series excited machine, helps to promote the operating efficiency of the course of work.
The beneficial effects of the utility model are:
1. the volume of instrument is less, weight is lighter, is more suitable for hand-held operation, operates more comfortable;
2. motor speed is less with the variation fluctuation of load, and instrument efficient improves.
Description of drawings
Fig. 1 adopts the typical electric hammer cutaway view of Nd-Fe-B permanent magnetic direct current generator for the utility model;
Fig. 2 is the utility model typical case electric hammer input-output characteristic curve figure.
Wherein: 1 SDS collet system; 2 transmission systems; 3 switches; 4 electric capacity; 5 inductance; 6 Nd-fe-b DC motors; 7 main handles; 8 rectification circuits; 9 rotors; 10 carbon brush and commutator; 11 neodymium iron boron (NdFeB) magnetic tiles; 12 steel bushings; 13 assist handles.
The specific embodiment
Fig. 1 illustrates the typical electric hammer that has adopted the Nd-Fe-B permanent magnetic direct current generator, comprise main handle (7), switch (3), electric capacity (4), inductance (5), rectification circuit (8), Nd-fe-b DC motor (6), transmission system (2), SDS collet system (1), assist handle (13) etc., wherein Nd-fe-b DC motor (6) comprises rotor (9), carbon brush and commutator (10), neodymium iron boron (NdFeB) magnetic tile (11), reaches steel bushing (12) etc.
The utility model substitutes electric hammer, the used series excited machine of electric drill in the past with Nd-Fe-B permanent magnetic direct current generator (6), and has increased rectification circuit (8) at the motor front end.AC power is passed through series inductance (5) after entering machine, shunt capacitance (4) reaches electromagnetic compatibility requirements, arrive rectification circuit (8) through switch (3) back, rectification circuit (8) is transformed into dc source DC with AC power AC, enter the preceding AC power AC of Nd-Fe-B permanent magnetic direct current generator (6) and become suitable dc source DC, dc source arrives rotor (9) through carbon brush and commutator (10), the stationary part of motor no longer is stator core and stator winding, but constitute by neodymium iron boron (NdFeB) magnetic tile (11) and steel bushing (12), neodymium iron boron (NdFeB) magnetic tile (11) is fixed on the steel bushing (12), steel bushing (12) is fixed on the casing, and Nd-Fe-B permanent magnetic direct current generator (6) than before series excited machine on volume and weight is much smaller.
Fig. 2 is the input-output characteristic curve figure that has adopted the electric hammer of Nd-Fe-B permanent magnetic direct current generator (6), and curve n is the rotating speed-torque curve of the electric hammer of employing Nd-Fe-B permanent magnetic direct current generator (6), dotted line n among the figure
0Be the rotating speed-torque curve of old series excited machine electric hammer, rotation speed n=728/min during Nd-Fe-B permanent magnetic direct current generator electric hammer zero load (M=0)
-1, reach rated input power (P
1=rotation speed n=675/min 1050W) time
-1, rotating speed only descends 7.3%, rotation speed n during old series excited machine electric hammer zero load (M=0)
1=855/min
-1, reach rated input power (P
1=rotation speed n 1050W) time
1=454/min
-1, rotating speed has descended 46.9%, and the older series excited machine electric hammer rotating speed-torque curve of Nd-Fe-B permanent magnetic direct current generator electric hammer is many gently.
Interchange electric hammer described in the utility model comprises two function electric hammers, three function electric hammer and electric pick etc.; described interchange electric drill comprises electric drill, electric impact drill etc.; used direct current generator can be that the Nd-Fe-B permanent magnetic direct current generator also can be the direct current generator of other types; limit never in any form, the technical scheme that form obtained that all employings are equal to replacement or equivalent transformation all drops within the protection domain of the present utility model.
Claims (4)
1, exchanges electric hammer or electric drill, mainly comprise main handle, switch, electric capacity, inductance, motor, transmission system, SDS collet system, assist handle etc., described switch is positioned at the main handle inboard, electric capacity is parallel to power supply, and inductance is series at power supply, and transmission system is between motor and collet system, assist handle is near the head of machine, it is characterized in that the motor that it comprises is a direct current generator, and comprise a rectification circuit, rectification circuit places the direct current generator front end.
2,, it is characterized in that wherein said direct current generator is the Nd-Fe-B permanent magnetic direct current generator according to described interchange electric hammer of claim 1 or electric drill.
3, according to described interchange electric hammer of claim 2 or electric drill, it is characterized in that wherein said Nd-fe-b DC motor comprises rotor, carbon brush and commutator, neodymium iron boron (NdFeB) magnetic tile and steel bushing etc., carbon brush and commutator are the part of rotor, the periphery of rotor is a neodymium iron boron (NdFeB) magnetic tile, neodymium iron boron (NdFeB) magnetic tile is fixed in the steel bushing inner surface, and steel bushing is installed on the casing.
4,, it is characterized in that wherein said direct current generator front end has at least a rectification circuit or similar fairing that AC power is transformed into dc source according to described interchange electric hammer of claim 1 or electric drill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620076934 CN200942511Y (en) | 2006-08-24 | 2006-08-24 | Alternating current electric hammer or drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620076934 CN200942511Y (en) | 2006-08-24 | 2006-08-24 | Alternating current electric hammer or drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200942511Y true CN200942511Y (en) | 2007-09-05 |
Family
ID=38717137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620076934 Expired - Fee Related CN200942511Y (en) | 2006-08-24 | 2006-08-24 | Alternating current electric hammer or drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200942511Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101961795A (en) * | 2009-07-23 | 2011-02-02 | 德昌电机(深圳)有限公司 | Electric tool |
| CN102528720A (en) * | 2010-12-28 | 2012-07-04 | 日立工机株式会社 | Power tool provided with circuit board |
| CN107717008A (en) * | 2017-10-30 | 2018-02-23 | 徐应盈 | A kind of convenient household electric drill |
-
2006
- 2006-08-24 CN CN 200620076934 patent/CN200942511Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101961795A (en) * | 2009-07-23 | 2011-02-02 | 德昌电机(深圳)有限公司 | Electric tool |
| CN102528720A (en) * | 2010-12-28 | 2012-07-04 | 日立工机株式会社 | Power tool provided with circuit board |
| CN102528720B (en) * | 2010-12-28 | 2015-11-04 | 日立工机株式会社 | Electric tool with circuit board |
| US9457459B2 (en) | 2010-12-28 | 2016-10-04 | Hitachi Koki Co., Ltd. | Power tool provided with circuit board |
| CN107717008A (en) * | 2017-10-30 | 2018-02-23 | 徐应盈 | A kind of convenient household electric drill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070905 Termination date: 20100824 |