CN102441704A - Electric tool - Google Patents
Electric tool Download PDFInfo
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- CN102441704A CN102441704A CN2010105112664A CN201010511266A CN102441704A CN 102441704 A CN102441704 A CN 102441704A CN 2010105112664 A CN2010105112664 A CN 2010105112664A CN 201010511266 A CN201010511266 A CN 201010511266A CN 102441704 A CN102441704 A CN 102441704A
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- Prior art keywords
- saw blade
- motor
- electric tool
- housing
- rotating speed
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Abstract
The invention relates to an electric tool, which comprises a shell, a motor and a saw blade, wherein the motor is arranged in the shell; the saw blade rotates relative to the shell under the driving action of the motor; and the rotating speed of the saw blade is more than or equal to 1,000 revolutions per minute. In the electric tool provided by the invention, the rotating speed of the saw blade is greatly increased, the rotating frequency of the saw blade is increased, and the time interval between two times of adjacent cutting is shortened, so that the distance between adjacent tool marks left by the saw blade on a workpiece surface is shortened, and the surface cutting accuracy of a workpiece is greatly increased; and the rotating speed of the blade is increased, the rotating linear speed of the saw blade is increased, and the feeding speed of the saw blade on the workpiece is increased greatly, so that the cutting efficiency is increased.
Description
Technical field
The present invention relates to a kind of electric tool, relate in particular to a kind of electric tool of saw blade rotation.
Background technology
Various revolution type electric tools all are electric tools of popularizing very much like electric circular saw, diagonal cutting saw, bench saw etc., are widely used in industries such as automobile, boats and ships, wooden model, decoration.In the ordinary course of things timber, metal, plastics, rubber are waited until and carried out sawing.
These electric tools generally by motor as power, the rotating tee of motor is crossed reducing gear and is delivered to driving shaft, by drive shaft saw blade rotation and then reach the purpose of cutting.
The saw blade rotating speed of saw blade different size, the sawing different materials has certain difference, and the saw blade rotating speed of the saw blade that occurs in the market is about 2000 to 5000 rev/mins, and rotating speed is low, and the tool marks distance that adjacent cutting twice stays is bigger, and surface accuracy is not high.
Summary of the invention
To the deficiency of prior art, the object of the present invention is to provide a kind of electric tool with higher saw blade rotating speed.
For realizing the foregoing invention purpose, the technical scheme that the present invention takes is: housing; Be arranged on the motor in the housing; Under the driving of said motor, produce the saw blade that rotatablely moves with respect to housing; The rotating speed of said saw blade is more than or equal to 10000 rev/mins.
Preferably, the rotating speed of said saw blade is between 10000 rev/mins to 20000 rev/mins.
Preferably, said saw blade is provided with perforate.
Preferably, said saw blade is whole saw blade.
Preferably, the diameter of said saw blade is less than 5 inches.
Preferably, said electric tool is provided with pipeline, and said pipeline sprays cooling medium to said saw blade.
Preferably, said electric tool also is provided with the electromagnet brake gear that makes the saw blade stall.
Preferably, said electric tool is provided with cooling back installation.
Preferably, said housing is provided with the fin that increases area of dissipation.
Preferably; Said electric tool also comprises controller; The operating voltage and the load current of the said motor of said monitoring control devices; And calculate according to the load current of said motor and to reach the required target voltage of preset rotation speed, adjust operating voltage to the said target voltage of said motor, make said motor constant rotation under preset rotation speed.
The saw blade rotating speed of electric tool provided by the invention improves greatly; Can improve the frequency of saw blade rotation; Blanking time between the adjacent cutting twice shortens, thus the spacer defection of the tool marks that saw blade stays on surface of the work shorten greatly, this can improve the surperficial cutting accuracy of workpiece greatly; The rotating speed of saw blade improves, and the linear velocity of saw blade rotation also can be accelerated, and the feed speed of saw blade on workpiece can be accelerated greatly, thereby improves cutting efficiency.
Description of drawings
Do further explain below in conjunction with accompanying drawing and the preferred embodiments of the present invention.
Fig. 1 is the three-dimensional assembly diagram of electric circular saw provided by the invention;
Fig. 2 be along Y-Y line among Fig. 1 towards V to cutaway view.
Fig. 3 is the sketch map that the electromagnet brake gear of electric circular saw provided by the invention makes the saw blade stall.
Fig. 4 is the partial enlarged drawing of A part among Fig. 3.
Fig. 5 is the saw blade sketch map of electric circular saw provided by the invention.
Wherein, the related elements reference numeral is following:
1. saw blade 2. saw blade housings 3. motors
4. electric machine casing 7. transmission devices 8. switch elements
6. saw blade cooling device 61. pipelines 62, shower nozzle
20. driving shaft 21. base plates 31. motor shafts
9. electromagnet brake gear 91. electromagnet 92. brake block
93. boss 94. boss 95. springs
96. track 922. heads 923. afterbodys
52. first handle 53. second handles 100. electric circular saws
210. gear wheel 311. pinions 40. cooling back installations
41. jog 11. perforates 63. tank for coolants
312. motor shaft bearing
The specific embodiment
Referring to figs. 1 through Fig. 3, present embodiment has disclosed a kind of electric circular saw 100, and this electric circular saw 100 comprises and is used for the saw blade 1 of processing work, is used for driving the motor 3 of saw blade 1; Housing, housing comprise the saw blade housing 2 and the electric machine casing 4 that is used for holding motor 3 that holds and support this saw blade 1, support the base plate 21 of this saw blade housing 2; Motor 3 has a motor shaft 31, and 312 pairs of motor shafts 31 of motor shaft bearing play supporting role, and motor shaft bearing 312 can use common ball bearing; Preferably use when high rotating speed is provided, it is little to rub, resistant to elevated temperatures bearing; Like air-bearing, fluid bearing etc., these bearings utilize gas or liquid as lubricant; Resistance is lower, allows high rotational speed, keeps lower level of vibration simultaneously; Resistance is little and then rub for a short time, and the heat of power loss and generation is little, and is less thereby temperature rises.Certainly, not only the motor shaft bearing can use air-bearing, fluid bearing, and other bearing also can use air-bearing, fluid bearing.This motor shaft 31 is around axis Z rotation, is used for moving said electric circular saw 100 and makes its handle apparatus with respect to workpiece motion s, and handle apparatus has first handle 52 and second handle 53, and the switch element 8 that power supply is connected is arranged on the first handle 52.
The rotating speed of the saw blade 1 of present embodiment is more than or equal to 10000 rev/mins, and the rotating speed of preferred saw blade for example is 16000 rev/mins between 10000 rev/mins to 20000 rev/mins, and the frequency of saw blade 1 rotation is very fast.Saw blade 1 is when cutting; Inevitably can on workpiece, stay tool marks; When the frequency of saw blade 1 rotation is accelerated; Shortened the blanking time between the adjacent cutting twice, thus the spacer defection of the tool marks that saw blade 1 stays on surface of the work shorten greatly, this can improve the surperficial cutting accuracy of workpiece greatly.The frequency of saw blade 1 rotation is accelerated, and the linear velocity of saw blade is accelerated, and the feeding of saw blade 1 on workpiece goes out speed to be accelerated greatly, thereby can improve cutting efficiency greatly.On the basis that the feed speed of saw blade and cutting accuracy improve, it is lighter that the user promotes the feeding meeting of electric circular saw on workpiece, uses more convenient.
The saw blade 1 of the electric circular saw 100 of present embodiment rotating speed more in the market the saw blade rotating speed of conventional electric circular saw improve greatly; This can be accomplished in several ways; As under the situation that does not change original speed reducing ratio, selecting high output speed motor for use; Perhaps when not changing motor, reach the rotating speed that saw blade needs, thereby even can directly drive the very high saw blade rotating speed of saw blade rotation acquisition by motor output shaft through the speed reducing ratio that changes between motor output shaft and the driving shaft.In a word, as long as rationally select for use motor and/or reasonable disposition speed reducing ratio just can reach desirable saw blade rotating speed.
The rotating speed of saw blade 1 improves, and temperature will raise in the saw blade course of work, and this can constitute influence to the life-span of saw blade; High temperature when working for reducing saw blade, as shown in Figure 5, present embodiment saw blade 1 is provided with several perforates 11; These perforates can be quickened gas flow, thereby saw blade is lowered the temperature.The quantity of perforate, size and arrange and to require reasonable Arrangement according to saw blade size, requirements for life and noise.Perforate also can alleviate the weight of saw blade on saw blade, reduces saw blade and rotates the injury to driving shaft at a high speed.Saw blade can be selected the saw blade of various ways for use, and like the braze welding type saw blade, monoblock type saw blade etc. preferably use the monoblock type saw blade, and when using the monoblock type saw blade, the serrations that can not occur welding is rotated the danger that is thrown out of under the high centrifugal force effect that brings at a high speed at saw blade.The diameter of saw blade is preferably less than 10 inches, and is preferred, saw blade directly less than 5 inches; So; Both can satisfy the requirement to depth of cut, cutting efficiency and cutting accuracy, the potential of centrifugal force that can make saw blade rotation generation again increases the danger that brings thereby reduce saw blade centrifugal force in an acceptable scope; As when selecting the braze welding type saw blade for use, serrations is thrown out of the danger of saw blade under centrifugal action.
For reducing the high temperature in the saw blade course of work, present embodiment saw blade housing 2 is provided with saw blade cooling device 6.Particularly, this saw blade cooling device 6 comprises pipeline 61, shower nozzle 62 and tank for coolant 63, thereby cooling medium sprays to saw blade 1 from tank for coolant 63 through pipeline 61 and shower nozzle 62 saw blade is lowered the temperature.Cooling medium can be a liquid, can be gas also, during using gases, and dress Compressed Gas in the tank for coolant 63.When selecting cooling fluid for use; Cooling fluid sprays to saw blade 1 can be by saw blade 1 scattering, and the cooling fluid that scatters out is stopped that by saw blade housing 2 cooling fluid that sprays to saw blade housing 2 possibly also can scatter on the saw blade 1; So repeatedly to saw blade 1 cooling; At last, cooling fluid is saw blade 1 and the outflow of saw blade housing 2 lower edges in the effect lower edge of gravity, and the cooling fluid of outflow can be accelerated the discharging of sawdust.When using cooling fluid, preferred nonconducting material can not cause electric leakage like this and causes danger, under situation about carrying out the live part sealing, can use the simplest water as cooling fluid certainly yet.During as cooling medium, the gas flow direction of preferred sprinkler 62 ejections is consistent with the direction of rotation of saw blade at using gases, and this will accelerate the discharge of sawdust and can not make sawdust blow to the user.Present embodiment can also have some alternatives, during like using gases cooling saw blade, can not use the Compressed Gas that is stored in the tank for coolant 63, and use air blast or fan that saw blade is cooled off in the saw blade blowing.
The saw blade rotating speed is very high, in use, possibly make the urgent stall of saw blade; For saw blade is stopped operating fast, present embodiment is provided with electromagnet brake gear 9 in housing, particularly; To shown in Figure 4, electromagnet brake gear 9 comprises the electromagnet 91 and brake block 92 that is oppositely arranged like Fig. 2, and electromagnet 91 can slide in track 96 with brake block 92; Electromagnet 91 is horizontal " I " type roughly, but the intermediate portion winding around, and brake block 92 is substantial transverse T-shape; The head 922 of its broad is provided with towards electromagnet 91, and narrower afterbody 923 is provided with towards saw blade 1, and track 96 two-port respectively are provided with a boss 93 and 94; Wherein boss 93 can prevent that electromagnet 91 from skidding off outside the track 96, is provided with a spring 95 between the head 922 of boss 94 and brake block 92.Brake block 92 is a magnet, and is as shown in Figure 2, and saw blade 1 is in course of normal operation, and electromagnet 91 no powers do not have magnetic and are braked piece 92 and hold, and brake block 92 is being separated with a segment distance under the effect of spring 95 and between saw blade; When 1 stall of needs saw blade; Give electromagnet 91 energisings; Electromagnet 91 is switched on and is produced magnetic, and it is identical near the magnetic of an end of electromagnet 91 with brake block 92 near magnetic that an end of brake block 92 produces, and electromagnet 91 repels with brake block 92 each other; This repulsive force makes elastic force that brake block 92 overcomes spring 95 move and finally make the saw blade stall against living saw blade towards saw blade 1, and Fig. 3 and Fig. 4 show the sketch map that the electromagnet brake gear makes the saw blade stall.Certainly; Present embodiment can have other mode of texturing, as in the saw blade course of normal operation, giving electromagnet 91 energisings, makes its magnetic and brake block 92 near the generation of brake block 92 1 ends opposite near the magnetic that electromagnet 91 1 ends produce; Electromagnet 91 attracts each other with brake block 92; When needs make the saw blade stall, oppositely switch on for electromagnet 91, the repulsions and make brake block 92 move and make the saw blade stall each other of electromagnet 91 and brake block 92 towards saw blade 1.For for simplicity, not shown lead and the switch that provides the electromagnet energising of Fig. 2 to Fig. 4.Certainly, the electromagnet brake gear of present embodiment also can use other common mechanical type brake gear to substitute, and gives unnecessary details no longer one by one at this.
The saw blade rotating speed improves, and needs motor 3 high speed operations, and motor 3 temperature will raise; This will influence the life-span of motor 3, and the temperature of motor 3 raises, and the temperature of electric machine casing 4 also will raise; May iron the user, for addressing this problem, present embodiment is provided with cooling back installation 40 on housing 10; Circulating water cooling device for example, this circulating water cooling device comprises a plurality of pipelines that are arranged on the electric machine casing 4, water constantly circulates in pipeline; Thereby the temperature with electric machine casing heat-shift reduction electric machine casing is provided with sealable water filling port outside electric machine casing 4, and temperature raise after water used a period of time; Can change water this moment through this water filling port, and certainly, cooling medium also can use other bigger any media of specific heat.Electric machine casing 4 is preferred by the good material of heat dispersion, processes like aluminium, magnesium alloy etc.For further reducing the temperature of electric machine casing 4; Also some jogs 41 can be set on electric machine casing 4 surfaces; To increase the area of dissipation of electric machine casing, the form of the jog of present embodiment is the fin that is arranged on the housing, and the jog of other form also can be realized this function.Present embodiment is installed in cooling back installation and jog on the electric machine casing 4, but is not limited to this, in other higher part of case temperature, as accommodates the housing parts of transmission device 7, cooling back installation and jog all can be set so that housing is lowered the temperature.Cooling back installation 40 also is not limited to only housing lowered the temperature, and to the higher parts of temperature in electric circular saw 100 courses of work, like motor bearings 312 and bearing thereof etc. cooling back installation is lowered the temperature to it.Certainly, cooling back installation is set and fin is set uses separately.Present embodiment can also adopt alternate manner to electric circular saw 100 coolings; As plural fan is installed in housing to the parts in the housing; As motor is lowered the temperature; Fan also can be installed to housing outer surface and saw blade cooling outside housing, these fans can also can use independent motor to drive directly by motor-driven.
For saw blade is rotated under the rotating speed of approximately constant; Be provided with controller in the electric circular saw of present embodiment; The operating voltage and the load current of its monitoring motor 3, and calculate motor 3 according to the load current of motor 3 and reach the required target voltage of preset rotation speed, the operating voltage of adjustment motor 3 is to target voltage; Thereby make motor 3 constant rotation under preset rotation speed, obtain stable performance.
For a long time; Those skilled in the art think that the raising of saw blade rotating speed can bring some insurmountable problems; Like high temperature to influence of service life of a machine etc.; Present embodiment adopts multiple mode that electric circular saw 100 is lowered the temperature; Adopt some other measures reply rotating speeds to improve some other problems that may bring simultaneously, when obtaining high cutting accuracy that the rotation of saw blade height brings and high cutting efficiency, avoided some problems that possibly occur, make rotating speed be able to enforcement more than or equal to 10000 rev/mins electric circular saw.
The foregoing description is example with the electric circular saw, other revolution type electric tool such as diagonal cutting saw. bench saws etc. all can adopt technical scheme of the present invention, improve surface of the work cutting accuracy and the purpose that improves cutting efficiency thereby reach.The technical scheme of all employing equivalents or equivalence replacement is all in protection scope of the present invention.
Claims (10)
1. electric tool comprises:
Housing;
Be arranged on the motor in the housing;
Under the driving of said motor, produce the saw blade that rotatablely moves with respect to housing;
It is characterized in that: the rotating speed of said saw blade is more than or equal to 10000 rev/mins.
2. electric tool as claimed in claim 1 is characterized in that: the rotating speed of said saw blade is between 10000 rev/mins to 20000 rev/mins.
3. motor instrument as claimed in claim 1 is characterized in that: said saw blade is provided with perforate.
4. motor instrument as claimed in claim 1 is characterized in that: said saw blade is whole saw blade.
5. motor instrument as claimed in claim 1 is characterized in that: the diameter of said saw blade is less than 5 inches.
6. electric tool as claimed in claim 1 is characterized in that: said electric tool is provided with pipeline, and said pipeline sprays cooling medium to said saw blade.
7. electric tool as claimed in claim 1 is characterized in that: said electric tool also is provided with the electromagnet brake gear that makes the saw blade stall.
8. electric tool as claimed in claim 1 is characterized in that: said electric tool is provided with cooling back installation.
9. electric tool as claimed in claim 1 is characterized in that: said housing is provided with the fin that increases area of dissipation.
10. electric tool as claimed in claim 1; It is characterized in that: said electric tool also comprises controller; The operating voltage and the load current of the said motor of said monitoring control devices; And calculate according to the load current of said motor and to reach the required target voltage of preset rotation speed, adjust operating voltage to the said target voltage of said motor, make said motor constant rotation under preset rotation speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105112664A CN102441704A (en) | 2010-10-01 | 2010-10-01 | Electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105112664A CN102441704A (en) | 2010-10-01 | 2010-10-01 | Electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102441704A true CN102441704A (en) | 2012-05-09 |
Family
ID=46004913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105112664A Pending CN102441704A (en) | 2010-10-01 | 2010-10-01 | Electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102441704A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107877319A (en) * | 2016-09-30 | 2018-04-06 | 南京德朔实业有限公司 | Hand held electric tool |
| CN109820462A (en) * | 2019-03-28 | 2019-05-31 | 佛山市百斯特电器科技有限公司 | A kind of method and dish-washing machine controlling motor |
-
2010
- 2010-10-01 CN CN2010105112664A patent/CN102441704A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107877319A (en) * | 2016-09-30 | 2018-04-06 | 南京德朔实业有限公司 | Hand held electric tool |
| CN109820462A (en) * | 2019-03-28 | 2019-05-31 | 佛山市百斯特电器科技有限公司 | A kind of method and dish-washing machine controlling motor |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120509 |