CN1496800A - Portable electric cutting device with blower mechanism - Google Patents
Portable electric cutting device with blower mechanism Download PDFInfo
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- CN1496800A CN1496800A CNA2003101025332A CN200310102533A CN1496800A CN 1496800 A CN1496800 A CN 1496800A CN A2003101025332 A CNA2003101025332 A CN A2003101025332A CN 200310102533 A CN200310102533 A CN 200310102533A CN 1496800 A CN1496800 A CN 1496800A
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- saw
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- cutting device
- saw blade
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- 238000005520 cutting process Methods 0.000 title claims abstract description 135
- 230000007246 mechanism Effects 0.000 title description 18
- 238000007664 blowing Methods 0.000 claims abstract description 29
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- 238000005192 partition Methods 0.000 claims description 107
- 230000001012 protector Effects 0.000 claims description 90
- 230000001681 protective effect Effects 0.000 claims description 81
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Abstract
Fanned air generated by a fan to cool a motor is discharged from a housing through fanned air discharge ports toward an opening formed in a base. The fanned air discharged toward the opening is then introduced into a groove in fluid communication with the opening. The groove is formed in a bottom surface of the base and has an open side at a front side of the base. The fanned air is then discharged from the front side of the base, blowing off saw dust on a cutting object so as to prevent dust from accumulating on a marking line on the cutting object.
Description
Technical field
The present invention relates to portable electric cutting device, relate in particular to the portable electric cutting device that is provided with exhaust gear, wherein this exhaust gear is used for air is discharged to the saw blade housing parts that saw covers from shell.
Background technology
When by using portable electric cutting machine (hereinafter being referred to as " portable electric annular saw ") to cutting object (for example timber) when cutting, in order to improve sharpnes of cuts, the mark line that on cutting object, draws, and cut along described mark line subsequently.More specifically, be used to indicate the prerotation vane of saw blade marginal portion to be placed in the front end of base plate, so that prerotation vane is positioned on the dotted line that extends towards the cut direction of saw blade.The user can cut cutting object in the blade edge of directly confirming saw blade and the relation of the position between the mark line on the cutting object.On the other hand, the user can cut cutting object in the blade edge of the indirect acknowledgment saw blade by prerotation vane is aimed at mark line and the relation of the position between the mark line on the cutting object.
Yet if a large amount of sawdust that produce in cutting operation process are deposited on the cutting object, mark line becomes and cannot see.In this case, the user no longer can confirm the blade edge and the relation of the position between the mark line of saw blade, and this causes the reduction of sharpnes of cuts and the reduction of cutting efficiency.
For example, when the sawdust that produces in the cutting operation upwards flew to drop to cutting object then, sawdust was deposited on the cutting object.Therefore, the sawdust that uses dust arrester to be collected in to produce in the cutting operation process is to prevent that sawdust from upwards flying to expect in cutting operation process.Yet sawdust not only can produce in cutting operation process, and can produce in other operating process of using many other instruments.In this case, both made the such dust arrester of use in cutting operation process, sawdust also can be deposited on the cutting object, thereby covers mark line.In this case, the user need wipe or blow off the sawdust on the cutting object before the beginning cutting operation, so that the user can see mark line.This has reduced the efficient of cutting operation.Equally, the user need stop cutting operation, to remove the sawdust that has produced and be deposited on the cutting object.The efficient that this had not only reduced sharpnes of cuts but also reduced cutting operation.
Japanese Utility Model patent No.2607480 has disclosed a kind of traditional portable electric annular saw, and it comprises: saw blade, drive saw blade motor, hold described motor shell, be connected in saw lid on the described shell, be connected to the base plate and the fan of described shell.This saw lid has the saw blade holding portion of the outer peripheral first half that holds saw blade.This base plate has the bottom surface of sliding on cutting object.This fan to produce air-flow (hereinafter being referred to as " agitating air "), is used for making the motor cooling by Motor Drive.On the wall of the lid of the saw blade between fan and the saw blade housing parts, be formed with and agitate air discharge ports, be discharged in the saw blade housing parts will agitate air.Agitate air discharge ports to limit by a plurality of partition walls.
Each partition wall all has parallel with the rotating shaft of fan and towards the surface of radially extending of rotating shaft.Like this, when when agitating air discharge ports, agitate air to be directed flowing, and then be discharged to the saw blade housing parts with direction towards the rotating shaft that is in substantially parallel relationship to fan.Be discharged to agitating air and being contained in the side of the saw blade in the saw blade housing parts and the side collision of protective cover in the saw blade housing parts in this manner; this protective cover is rotatably laid, so that the saw blade housing parts can hold protective cover in cutting operation process.Then, agitate the side diffusion of air along saw blade and protective cover.Then, diffusion agitate air by saw lid inwall and saw blade between or be discharged into the outside of saw lid between the inwall of saw lid and the protective cover.Because agitate air substantially with the side collision of right angle and saw blade and protective cover, the air of agitating of collision spread (across) most of (wide area) surface substantially equably.Because the effect of air-flow agitates air to discharge towards cut direction from the rear side of saw lid, wherein this air-flow is owing to the rotation of the saw blade in the saw blade housing parts produces.
This fan is a centrifugal fan.Agitate air towards the flowing radially outward of centrifugal fan, along the inwall turn of shell, then by agitating air discharge ports to be discharged in the saw blade housing parts by what centrifugal fan produced.Flow velocity of agitating air by agitating air discharge ports discharging and flow are higher in the radially zone near the rotating shaft of fan with respect to fan, and be lower in the zone away from rotating shaft.So just the problem at region generating noise radially far away has appearred.This problem can solve by size that reduces fan or the velocity of rotation that reduces fan.Yet this causes the flow velocity of agitating air to reduce, thereby has reduced the cooling performance of fan.
Japanese utility model application publication No.SHO-55-154101 has disclosed a kind of portable electric annular saw, and this annular saw comprises the cylindrical conduit that is placed on the place, outside of saw lid along shell.This conduit is communicated with agitating air discharge ports.Agitate air by the end face of catheter guidance from what the fan discharge of agitating was discharged, and blow sawdust off from cutting object to cutting object.By this way, can prevent that sawdust and other dust accretions are on cutting object.
Yet when the position between the blade edge of confirming mark line and saw blade concerned, conduit became obstacle, and it has reduced the observability of mark line.In addition, because the quantity of assembly increases, efficiency of assembling reduces, and cost increases.
When carrying out cutting operation, for example in having the closed area of the confined space or when the wall of last lacquer is carried out cutting operation in still for wet room, blow and agitate air so that sawdust scatters may not be preferred.
Summary of the invention
Consider the above, a target of the present invention is to address the above problem, and provide a kind of portable electric annular saw, this portable electric annular saw can be used to make that the motor cooling produced agitates air to prevent that effectively dust from piling up on cutting object by use, so that improve sharpnes of cuts and cutting efficiency.
Another target of the present invention provides a kind of portable electric annular saw, and it can prevent that selectively dust from scattering by agitating air, and does not increase component count.
Another target of the present invention provides and a kind ofly can suppress that noise produces and the portable electric annular saw that do not reduce the cooling performance of fan.
In order to obtain above-mentioned and other target, the invention provides a kind of portable electric cutting device, the saw blade that it comprises shell, cut cutting object along cut direction, have part and hold the saw lid of the housing parts of described saw blade, be connected to one of at least base plate of shell and saw lid, be installed in fan in the shell, this fan produces as the air-flow of agitating air.This base plate has the bottom surface of sliding on cutting object, described bottom surface is formed with opening, and wherein saw blade passes that described Open Side Down protrude to surpass the bottom surface of described base plate.The saw lid has the wall that is placed between shell and the saw blade housing parts.This wall is provided with the partition wall of a plurality of floss holes of a plurality of qualifications, and by this partition wall, the air of agitating of portion's generation in the enclosure discharges forward towards the opening that forms in base plate in cut direction.
Description of drawings
Fig. 1 is the schematic perspective view according to the portable electric annular saw of the first embodiment of the present invention;
Fig. 2 is the schematic elevational view according to the portable electric annular saw of the first embodiment of the present invention;
Fig. 3 is the schematic cross section along the portable electric annular saw of the intercepting of the line III-III among Fig. 2;
Fig. 4 is the schematic plan view of the portable electric annular saw among Fig. 1;
Fig. 5 is the schematic right-side view according to the portable electric annular saw of the first embodiment of the present invention;
Fig. 6 is the schematic right-side view according to the portable electric annular saw of first embodiment, and wherein this portable electric annular saw has about tilt 45 ° saw blade of the bottom surface of base plate;
Fig. 7 is the schematic left view according to the portable electric annular saw of first embodiment;
Fig. 8 is the schematic left view according to the portable electric annular saw of first embodiment, and wherein this portable electric annular saw has about tilt 45 ° saw blade of the bottom surface of base plate;
Fig. 9 is the schematic elevational view according to the portable electric annular saw of first embodiment, and wherein this portable electric annular saw has shallow depth of cut;
Figure 10 is the schematic left view according to the portable electric annular saw of first embodiment, and wherein this portable electric annular saw has shallow depth of cut;
Figure 11 is the schematic left view according to the base plate of the portable electric annular saw of first embodiment;
Figure 12 is the schematic right-side view of base plate among Figure 11;
Figure 13 is the schematic left view of the base plate of Figure 11;
Figure 14 is the schematic perspective view according to the bottom surface of the portable electric annular saw of first embodiment;
Figure 15 is the schematic elevational view that the saw of the portable electric annular saw of first embodiment covers;
Figure 16 is the schematic rear view of the saw lid of Figure 15;
Figure 17 is the cross-sectional view along the saw lid of the intercepting of the line B-B among Figure 16;
Figure 18 is the schematic elevational view of the saw lid of Figure 16;
Figure 19 is the schematic cross section along the saw lid of the intercepting of the line C-C among Figure 18;
Figure 20 is the schematic cross section along the partition wall of the saw lid of the intercepting of the line a-a among Figure 16;
Figure 21 is the schematic cross section along the partition wall of the saw lid of the intercepting of the line b-b among Figure 16;
Figure 22 is the schematic cross section along the partition wall of the saw lid of the intercepting of the line c-c among Figure 16;
Figure 23 is the schematic cross section along the partition wall of the saw lid of the intercepting of the line d-d among Figure 16;
Figure 24 is the schematic cross section along the partition wall of the saw lid of the intercepting of the line e-e among Figure 16;
Figure 25 is that wherein saw blade is removed according to the schematic elevational view of the portable electric annular saw of first embodiment;
Figure 26 is the schematic elevational view according to the portable electric annular saw of first embodiment, and wherein saw blade is removed and saws lid and rotates (pivot) with respect to the base plate pivot;
Figure 27 is the schematic perspective view according to the portable electric annular saw of first embodiment, and wherein saw blade is removed and protective cover pivots to the position that does not protrude the lower end of protective cover on the bottom surface of base plate;
Figure 28 is the schematic rear view according to the portable electric annular saw of first embodiment;
Figure 29 is the schematic elevational view of portable electric annular saw according to a second embodiment of the present invention;
Figure 30 is the schematic plan view of the major part of portable electric annular saw according to a second embodiment of the present invention;
Figure 31 is the schematic right-side view of the major part of portable electric annular saw according to a second embodiment of the present invention;
Figure 32 is the schematic rear view of the saw lid of portable electric annular saw according to a second embodiment of the present invention;
Figure 33 is the schematic cross section along the saw lid of the line D-D among Figure 32;
Figure 34 is the schematic stereo bottom view of the saw lid of portable electric annular saw according to a second embodiment of the present invention;
Figure 35 is the schematic stereo bottom view of the portable electric annular saw of a third embodiment in accordance with the invention;
Figure 36 is the schematic bottom view of the portable electric annular saw of a fourth embodiment in accordance with the invention, and wherein protector (shield member) is positioned at non-protective position place;
Figure 37 is the schematic bottom view of the portable electric annular saw of a fourth embodiment in accordance with the invention, and wherein protector is positioned at the protective position place;
Figure 38 is the schematic cross section of portable electric annular saw according to a fifth embodiment of the invention, and wherein protector is positioned at non-protective position;
Figure 39 is the schematic cross section of portable electric annular saw according to a fifth embodiment of the invention, and wherein protector is positioned at and adjusts the position;
Figure 40 is the schematic cross section of portable electric annular saw according to a fifth embodiment of the invention, and wherein protector is positioned at the protective position place;
Figure 41 is the schematic cross section of portable electric annular saw according to a sixth embodiment of the invention, and wherein prerotation vane is installed on the base plate, and its non-protection side is towards the below;
Figure 42 is the schematic perspective view of the prerotation vane of Figure 41, and wherein non-protection side is towards the below;
Figure 43 is the schematic cross section of portable electric annular saw according to a sixth embodiment of the invention, and wherein prerotation vane is installed on the base plate, and its protection side is towards the below;
Figure 44 is the schematic perspective view of the prerotation vane of Figure 43, and wherein its protection side is towards the below;
Figure 45 is the schematic perspective view of portable electric annular saw according to a seventh embodiment of the invention, and wherein saw blade is removed, and protector is positioned at non-protective position place;
Figure 46 is the schematic perspective view of portable electric annular saw according to a seventh embodiment of the invention, and wherein saw blade is removed, and protector is positioned at the protective position place;
Figure 47 is the schematic stereo rearview of portable electric annular saw according to a seventh embodiment of the invention;
Figure 48 is that the saw lid of portable electric annular saw according to a seventh embodiment of the invention intercepts schematic cross section along the line corresponding to the line C-C among Figure 18;
Figure 49 is that wherein saw blade is removed according to the schematic stereo bottom view of the portable electric annular saw of the eighth embodiment of the present invention, and protector is positioned at non-protective position place;
Figure 50 is that wherein saw blade is removed according to the schematic stereo bottom view of the portable electric annular saw of the eighth embodiment of the present invention, and protector is positioned at the protective position place;
Figure 51 is the schematic stereo rearview according to the portable electric annular saw of the eighth embodiment of the present invention;
Figure 52 is along the schematic cross section corresponding to the line intercepting of the line C-C among Figure 18 according to the portable electric annular saw of the eighth embodiment of the present invention;
Figure 53 is saw lid and is positioned at schematic rear view according to the protector at the non-protective position place of the portable electric annular saw of the ninth embodiment of the present invention;
Figure 54 is the schematic rear view that is positioned at according to the protector at the protective position place of the portable electric annular saw of the ninth embodiment of the present invention; And
Figure 55 is the schematic cross section along the line E-E among Figure 53.
The specific embodiment
Then, will portable electric annular saw according to an embodiment of the invention be described referring to accompanying drawing.At first, the portable electric annular saw of describing according to the first embodiment of the present invention with reference to Fig. 1-2 8.
(1) essential structure
As shown in Figure 1 to Figure 3, the portable electric annular saw of present embodiment comprise that motor 1, shell 2, handle 3, saw blade 4, saw cover 5, base plate 6 and fan 7.Motor 1 drives saw blade 4 and rotates.The shell support is also held motor 1.Handle 3 forms as one with shell 2 or is connected to shell 2 as assembly independently.The user can open or close motor 1 by the switch 3a of control crank 3.Saw covers 5 and is connected on the shell 2, and has saw blade housing parts 5a.Saw blade 4 has towards the fan side side of fan 7 with towards the housing parts side side of saw blade housing parts 5a.Saw blade housing parts 5a partly holds first peripheral part of saw blade 4 and the fan side side of saw blade 4.Base plate 6 covers 5 by saw and is connected to shell 2, and has the bottom surface 6a that slides on cutting object.Base plate 6 is shaped on opening 6b, and saw blade 4 protrudes downwards by opening 6b and surpasses bottom surface 6a.Fan 7 is fixed on the output shaft 1a of motor 1, so that fan 7 rotates along with the driving rotation of motor 1.The rotation of fan 7 produces and agitates air, so that motor 1 cooling.As shown in Figure 15, agitate air outlet 5c in the wall of the lid of the saw between fan 7 and saw blade housing parts 5a 5, to form, be used for and agitate air to be discharged to the saw blade housing parts 5a from shell 2.Agitating air outlet 5a to be limited by a plurality of partition wall 5d forms.
As shown in Figure 3, an end of shell 2 is formed with air inlet 2a, and the inner space of shell 2 is communicated with the space outerpace fluid by air inlet 2a.The rotation of fan 7 sucks air in the shell 2 by air inlet 2a.Air is as agitating the air outer peripheral edges of motor 1 of flowing through, and makes motor 1 cooling.That is, fan 7 is set up, with agitating ventilated motor 1.Should be noted in the discussion above that fan 7 arrow D indicated direction (hereinafter being referred to as " rotation direction D ") in Fig. 2 rotates.
Pinion 8 is placed in the end of the output shaft 1a of motor 1.Pinion 8 can form with the parts that output shaft 1a separates with whole formation of output shaft 1a or conduct.Pinion 8 and gears 9 engagements of being covered 5 supports rotationally by saw.Gear 9 be fixed to the coaxial driving shaft 10 of gear 9 on, thereby gear 9 rotates jointly with driving shaft 10.Driving shaft 10 cover 5 by bearing 11,12 by saw to be supported rotationally, and this bearing 11,12 and gear 9 are coaxial and gear 9 is added in middle.A pair of saw blade latching member 13 is connected on the driving shaft 10.Saw blade latching member 13 is not rotatable with respect to driving shaft 10, and saw blade 4 is clipped in therebetween.Use this structure, the driving power of motor 1 is sent to saw blade 4 via output shaft 1a, pinion 8, gear 9, driving shaft 10 and saw blade latching member 13, and saw blade 4 can be cut cutting object.Here, when the driving power with motor 1 was sent to saw blade 4, pinion 8 and gear 9 were reduced to driving power to a certain degree.The rotation direction of saw blade 4 is opposite with the rotation direction D of fan 7.
The portable electric annular saw also comprises protective cover 17, and it is supported by the driving shaft coaxial with it 10.Protective cover 17 covers half of outer peripheral edges of saw blade 4 substantially, and can be contained among the saw blade housing parts 5a.Protective cover 17 has lever 17a.Protective cover 17 is pushed for example promotion such as spring of (urging) part (not shown).Fig. 1 illustrates the original state of protective cover 17, and wherein the major part of protective cover 17 is protruded downwards on the 6a of the bottom surface of base plate 6, exposes so that prevent the outer peripheral edges of saw blade 4.When carrying out cutting operation, the rear end of front end of protective cover 17 (right-hand member among Fig. 2) and cutting object is in abutting connection with (abut).When the user make the portable electric annular saw on the cutting object when cut direction is slided, protective cover 17 rotates and enters saw blade housing parts 5a under the effect of the motive force of impeller, saw blade 4 is exposed to the 6a place, bottom surface of base plate 6.Do not cut away cutting away a slice from cutting object under the situation at any edge of cutting object, the user can rotate protective cover 17 by actuating linkage 17a, thereby saw blade 4 is exposed to the bottom.
Saw covers the 5 pinion housing parts 5e with the circle of being substantially, and is used to hold pinion 8.The bearing 14 that is used for supporting rotationally pinion 8 is press fit into saw and covers 5, so that pinion 8 is placed on substantially the central authorities of pinion housing parts 5e.
Saw covers 5 side surface is connected to shell 2 by screw 15 side.Pinion housing parts 5e is placed between saw blade housing parts 5a and the shell 2, is used for gear 9 is contained in wherein.That is to say that the effect of gear-box is played in the space between saw blade housing parts 5a and the shell 2.As described in Figure 2, saw cover 5 and is connected to base plate 6, covers 5 saw blade 4 is clipped between the front-end and back-end of base plate 6 so that saw.Saw blade camber adjustment mechanism and saw blade depth of cut guiding mechanism are set at the connecting portion office.
(2) saw blade camber adjustment mechanism
The saw blade camber adjustment mechanism comprises: be positioned near the anterior camber adjustment mechanism of the front end of base plate 6 (when when cut direction is watched) and be positioned at rear portion camber adjustment mechanism near the rear end of base plate 6.As shown in Figure 1, anterior camber adjustment mechanism comprises: rotating shaft 20, hinge support part 21, swash plate 23 and screw 24, and the rear portion camber adjustment mechanism comprises: pin (pin) 25, connecting rod 26, screw 27, swash plate 28 and screw 29.
At first, will anterior camber adjustment mechanism be described with reference to figure 1 and Fig. 4 to Fig. 6.The position of the front end of close base plate 6 in cut direction, pin 22 is installed on the base plate 6 rigidly.Pin 22 courts extend perpendicular to the direction of the rotating shaft of saw blade 4.Pin 22 plays the effect of first fulcrum on inclined-plane (inclination).Swash plate 23 is towards extending with the parallel substantially direction of the leading edge of base plate 6 with towards the direction that base plate 6 makes progress.Swash plate 23 is formed with arc-shaped through-hole 23a on the circular dashed line in pin 22 axle center at the center.Hinge support part 21 can be carried out left rotation and right rotation with respect to base plate 6 around pin 22.Hinge support part 21 and bolt 24 engagements of inserting through hole 23a.By screwing the position, angle of bolt 24 fixed hinge support sections 21.That is to say that the user can unclamp bolt 24 and lift shell 2,, hinge support part 21 is changed to state shown in Figure 6 from state shown in Figure 5 with respect to pin 22 rotary gemel support sections 21.The user can be by 24 heeling conditions of keeping hinge support part 21 of bolting on.
The shape of hinge support part 21 is U-shaped substantially, can clamp saw from right and a left side and cover 5 front end (Fig. 4).Rotating shaft 20 is rotatably supported by hinge support part 21.Saw covers 5 locates to form porose 5f in the front portion (Figure 15) that the rotating shaft with saw blade 4 extends in parallel substantially.Rotating shaft 20 is rotatably supported by hinge support part 21, and its patchhole 5f does up and down pivot rotation with respect to hinge support part 21 around rotating shaft 20 so that saw cover 5.
Then, will the rear portion camber adjustment mechanism be described with reference to figure 7 and Fig. 8.Pin 25 extends at the upper surface that is in substantially parallel relationship to base plate 6 and perpendicular to the direction of the rotating shaft of saw blade 4.Pin 25 plays the effect of second fulcrum on inclined- plane.Pin 25 and 22 is so arranged, so that connect the side surface extension that the dotted line of pin 25 and pin 22 is parallel to saw blade 4 substantially.Connecting rod 26 is connected to pin 25, and is pivoted towards base plate about 6 around pin 25.Swash plate 28 is parallel to the back edge of base plate 6 substantially and extends, and protruding up from base plate 6.Swash plate 28 is being to be formed with arc-shaped through-hole 28a on the central circular dotted line with pin 25.Connecting rod 26 and bolt 29 engagements of inserting through hole 28a are so that by 29 positions, angle that fix connecting rod 26 of bolting on.
As mentioned above, the saw cover 5 and base plate 6 be connected to each other by the pin 22 and 25 that plays first and second point actions.Under this structure, saw covers 5 and can be pivoted around pin 22 and 25 with respect to base plate 6.Saw cover 5 inclined-plane and makes the bottom surface 6a inclination of saw blade 4 with respect to base plate 6.The schematically illustrated saw lid 5 of Fig. 6 and Fig. 8, this saw lid 5 is pivoted around pin 22 and 25, so that the side of saw blade 4 is spent with respect to the bottom surface 6a inclination 45 of base plate 6, this is the maximum angle in the present embodiment.
Because handle 3 is positioned at the position away from saw blade 4, impose on the load operation (operate) of handle 3, thereby make the saw cover 5 and shell 2 be pivoted with respect to base plate 6.Therefore, preferably, swash plate 23 and swash plate 28 are arranged at the position (when watching) near the front-end and back-end of base plate 6 respectively in above-mentioned cross-wise direction.Such arrangement can prevent depth of cut accidental change and flip-flop, and the angle (location) that prevents saw blade 4 effectively is owing to the accidental change that the load that imposes on the portable electric annular saw causes, and guarantees the position precision of the saw blade 4 that is pivoted.Yet, in the swash plate only is provided.For example, have only the swash plate 23 can be near the front end setting of base plate 6.
Usually, serve as of the dotted line setting of the pin 22,25 of fulcrum near edge, the front and back extension of passing saw blade 4.Under this structure, position that the saw blade 4 of inclination protrudes downwards on the 6a of the bottom surface of base plate 6 and upright saw blade 4 do not have marked difference to the position of lower convexity.Equally, when using the saw blade 4 that tilts to carry out cutting operation (cutting sth. askew), can guarantee that depth of cut is bigger.
(3) saw blade depth of cut governor motion
As mentioned above, saw cover 5 and can carry out pivot rotation up and down with respect to hinge support part 21 around rotating shaft 20.The bottom of connecting rod 26 is connected to pin 25.As shown in figure 10, the top of connecting rod 26 can be contained in the saw blade housing parts 5a, and is provided with connecting rod guiding 26A, and connecting rod guiding 26A has the shape corresponding to the last inwall of saw blade housing parts 5a.The top of connecting rod guiding 26A is formed with the slotted hole 26a of longitudinal extension.Depth of cut is regulated bolt 27 and is passed slotted hole 26a and be fixed to saw and cover on 5.Bolt on 27, stationary links guiding 26A covers 5 position with respect to saw.
Use this structure, saw covers 5 and can be pivoted with respect to base plate 6 around rotating shaft 20.Saw cover the amount that 5 pivoting movement change saw blade 4 protrudes, i.e. depth of cut on the 6a of the bottom surface of base plate 6.Can 27 fix depth of cut by bolting on.Fig. 9 and Figure 10 illustrate, and saw cover 5 to be made clockwise pivot around rotating shaft 20 and rotate, and cover in 5 the rear end so that connecting rod guiding 26A is exposed to saw.
(4) laser cell
Saw covers 5 saw blade housing parts 5a and has shell side outer wall towards shell 2.To shown in Figure 6, laser cell 34 is arranged on the shell side outer wall of saw blade housing parts 5a as Fig. 4.This laser cell 34 comprises laser radiation device 34a, 34b.As shown in figure 18, the shell side outer wall of saw blade housing parts 5a is formed with groove 5i, and groove 5i has the planar section 5ia of the side extension that is parallel to saw blade 4 substantially.As Figure 16 institute not, planar section 5ia is formed with a pair of screwed hole 5ib.Laser cell 34 is connected to planar section 5ia (Figure 28) by bolt 35, so that the surface of the surperficial contact plane part 5ia of laser radiation device 34a.Laser radiation device 34a comprises two LED34aa, and this LED 34aa emission laser beam is with front end that illuminates base plate 6 and the marginal position (when watching in cross-wise direction) of indicating saw blade 4 at the point before the front end.Laser radiation device 34b covers 5 bottom front end to base plate 6 protrusions (Figure 25, Figure 28) from saw.Laser radiation device 34b comprises the LED (not shown), towards the laterally inclined direction emission laser beam with respect to saw blade 4.From laser radiation device 34b emitted laser bundle or near the marginal position of the front end of opening 6b (especially or near the position at the edge of saw blade 4) indication saw blade 4.The user is arranged on the ON/OFF control that switch 3b on the handle 3 carries out laser cell 34 by manipulation.The power supply of portable electric annular saw is supplied with laser cell 34 with electric power.
When laser cell 34 (especially laser radiation device 34b) is set, the accuracy of position is had relatively high expectations.According to present embodiment, because saw cover the exterior contour of the planar section of 5 planar section 5ia and laser cell 34, laser radiation device 34a can be located easily and accurately.Therefore, can carry out assembly manipulation efficiently.As shown in Figure 5 and Figure 6, should be noted that hinge support part 21 is positioned on the radiation route from the laser beam of LED 34aa, and be formed with groove 21a, thereby can not block laser beam.
(5) base plate
Then, will describe base plate 6 in detail with reference to figures 11 to Figure 14.
Above-mentioned swash plate 23,28 is provided with near the front-end and back-end of base plate 6 respectively.The corresponding extension in the edge, front and back of base plate 6 of each swash plate 23,28. Swash plate 23,28 is set in the upright position, so that extend towards the direction vertical with the bottom surface 6a of base plate 6.Projecting member 30,32 forms with swash plate 23,28 is whole respectively, protrudes from base plate 6, and supports corresponding pin 22,25, and pin 22,25 plays the effect that base plate 6 and saw cover 5 coupling part that connects.More specifically, as shown in figure 12, projection 30 is formed with the hole 31 that is used for support pin 22.On the other hand, projection 32 is formed with the hole 33 that is used for support pin 25.The axis of centres in hole 31,33 is aligned with each other in the direction that is parallel to saw blade 4 surfaces substantially.
Alternatively, it also is possible using a pair of porose 31 the projecting member 30 of all forming on each.Projecting member 30 be arranged side by side pin 22 axially.Pin 22 is supported between the projecting member 30, and hinge support part 21 is set between the projecting member 30.This structure prevents that the pin 22 that is connected to hinge support part 21 from deforming.Therefore, cover 5 for saw, also can eliminate the variation of the angle of depth of cut and saw blade 4 even the user applies excessive power by handle in cutting operation process.
As shown in figure 14, position, the front portion of the bottom surface 6a of base plate 6 (when watching in cut direction) is formed with groove 6c.But groove 6c is communicated with opening 6b fluid, and extends to the front end of base plate 6.Under state shown in Figure 9, groove 6c is located on the dotted line that plumbness extends forward from the leading edge of saw blade 4 towards cut direction, and has the big width of thickness than the blade edge of saw blade 4.The width of groove 6c is enough big, so that even also (see figure 6) in groove 6c of the dotted line that extends towards cut direction of the cross spider between the bottom surface 6a of the saw blade 4 of inclination maximum angle 45 degree and base plate 6.As shown in figure 12, the degree of depth of groove 6c is less than half of the degree of depth of base plate 6.
As Fig. 1, Fig. 4, shown in Figure 5,, will be used to indicate the prerotation vane 16 of the marginal position of saw blade 4 removably to be assembled to the end face of base plate 6 by bolt 18 in position corresponding to the front portion of groove 6c.Prerotation vane 16 comprises targeting part 16a and targeting part 16b.Targeting part 16a indicates the marginal position of saw blade 4 in the upright position of surface perpendicular to the bottom surface 6a extension of base plate 6 of saw blade 4.Targeting part 16b indication is with respect to the marginal position of the saw blades 4 of bottom surface 6a inclination 45 degree of base plate 6.
Protrude downwards the bottom surface of targeting part 16a, 16b, flush with the bottom surface 6a of base plate 6, and the bottom surface of prerotation vane 16 except targeting part 16a, 16b flushes with the end face of groove 6c basically.In this configuration, targeting part 16a or 16b can easily align with the mark line of drawing on cutting object.Equally,, between the upper surface of the bottom surface of prerotation vane 16 and cutting object, define air duct, be used to allow air therefrom to pass through because the bottom surface of prerotation vane 16 except targeting part 16a, 16b flushes with the end face of groove 6c basically.Should be noted that as long as between the bottom surface of prerotation vane 16 and cutting object, set up air duct, just there is no need to make the bottom surface of prerotation vane 16 to flush with the end face of groove 6c.
As mentioned above, groove 6c forms at the dotted line that the leading edge from saw blade 4 extends towards cut direction, and pin 22 is provided with near this dotted line.In other words, pin 22 vertically is positioned at the groove 6c last (Figure 12) of base plate 6.Bossing 30 extends to the place (near the left hand edge of swash plate 23) that does not form groove 6c from the place that forms groove 6c, it is porose 31 that this bossing 30 forms, and is used for pin 22 is remained on base plate 6.Under this structure, even applying excessive power by handle 3 in cutting operation process, the user covers on 5 to saw, bossing 30 can prevent that also base plate 6 from deforming, especially in the zone near groove 6c.Equally, ribs 6e is arranged on the base plate 6, extends to the place that does not form groove 6c from the place that forms groove 6c, raises up from base plate 6, from bossing 30 continuities.This ribs 6e strengthens base plate 6, and wherein owing to the existence of groove 6c, the intensity of this base plate 6 in groove 6c peripheral region reduces.Ribs 6e is can be with projection 30 integrally formed or separate formation with projection 30.
As shown in figure 14, also be formed with the hole 6d that is communicated with groove 6c fluid on the base plate 6.Can form hole 6d in the mechanically actuated process of the plane accuracy of the saw blade side surface that is used for improving projection 30.Because pin 22 is positioned at the position near the end face of base plate 6, the bottom of hinge support part 21 pass hole 6d on the end face of base plate 6 to lower convexity.In other words, hole 6d plays the effect of the shell of the bottom that holds hinge support part 21.
(6) blower mechanism
Then, will the blower mechanism of agitating air that utilization is produced by fan 7 be described with reference to figure 3 and Figure 15 to Figure 28.As shown in Figure 3, the saw width that cover 5 gear-box part is equal to or greater than the width of the gear 9 on output shaft 1a axial.As shown in figure 15, the gear-box part is formed with on the position outside along radius by pinion 8 and agitates air discharge ports 5c.This is agitated air discharge ports 5c will blow over shell 2 and the air of agitating of motor 1 cooling is imported in the saw blade housing parts 5a from shell 2.
Agitate air discharge ports 5c to limit by being arranged on a plurality of partition wall 5d of covering on 5 of saw.Partition wall 5d can cover 5 integrally formed or cover 5 and separate formation with sawing with saw.As shown in Figure 3, the width L1 of each partition wall 5d be about output shaft 1a axially on saw lid 5 the gear-box part width L 1/3.Agitate the radial dimension of air discharge ports 5c to make the outer peripheral edges of blade of fan 7 to agitate among the air discharge ports 5c with respect to radially being arranged on of output shaft 1a.
In the present embodiment, be provided with 7 partition wall 5d altogether.As Figure 15 and shown in Figure 16, agitate air discharge ports 5c around the center of rotation C1 of fan 7 radially arranged.More specifically, partition wall 5d comprises according to partition wall 5da1,5da2,5da3,5db, 5dc1,5dc2 and 5dc3 from the upstream side sequence arrangement of the rotation direction D of fan 7.Between two adjacent partition wall 5d, limit the single air discharge ports 5c that agitates.Extend because partition wall 5da1,5da2 etc. are in substantially parallel relationship to the rotating shaft of fan 7,, and agitate air discharge ports 5c to illustrate as the gap between these partition walls so Figure 15 and Figure 19 only illustrate the end face of these partition walls.On the other hand, because partition wall 5db, 5dc1 etc. have the part (targeting part that will describe in the back) of the rotating shaft that is not parallel to fan 7, not only show the end surface of these partition walls among Figure 15 and Figure 19, and show targeting part.Therefore, in these figure, targeting part is shown between contiguous partition wall and agitates air discharge ports 5c.
Second group of partition wall 5dc1,5dc2 and 5dc3 that comprises the downstream of the rotation direction D that is positioned at fan 7 of partition wall 5d.Partition wall 5dc1-5dc3 is positioned at the front portion of the center of rotation C2 of the center of rotation C1 of fan 7 and saw blade 4 with respect to cut direction.To shown in Figure 24, partition wall 5dc1-5dc3 is included in flow velocity that the direction of the rotating shaft that is in substantially parallel relationship to fan 7 extends and reduces parts 5dc1a, 5dc2a, 5dc3a and reduce guiding parts 5dc1b, 5dc2b, the 5dc3b that parts 5dc1a-5dc3a tilts to extend from flow velocity as Figure 22.Flow velocity reduces parts 5dc1a-5dc3a and is set at fan side, and guiding parts 5dc1b-5dc3b is set at saw blade housing parts side.Partition wall 5dc1-5dc3 discharges forward in cut direction and agitates air.
The 3rd group comprises partition wall 5db, and it is being positioned on rotation direction D of fan 7 between first group (partition wall 5da1-5da3) and second group (partition wall 5dc1-5dc3).Partition wall 5db vertically lays on the center of rotation C2 of saw blade 4 substantially.As shown in figure 21, partition wall 5db comprises that the flow velocity of the rotating shaft extension that is in substantially parallel relationship to fan 7 reduces parts 5dba and reduces the guiding parts 5dbb that parts 5dba tilts to extend from flow velocity.On the direction parallel with the rotating shaft of fan 7, flow velocity reduces the length of parts 5dba and the same length of partition wall 5dc1-5dc3.
Guiding parts 5dbb, 5dc1b, 5dc2b and the 5dc3b of partition wall 5d has the upstream side wall surface towards upstream side with respect to the rotation direction D of fan 7.The upstream side wall surface reduces parts 5dba, 5dc1a, 5dc2a, 5dc3a from flow rate corresponding shell side end tilts to extend to the downstream of rotation direction D.The shell side end is the end near saw blade housing parts 5.The upstream side wall surface of guiding parts 5dbb and 5dc1b-5dc3b is 45 degree with respect to the angle that flow rate corresponding reduces parts 5dba and 5dc1a-5dc3a.In partition wall 5dc1-5dc3, the border between the upstream side wall surface of speed minimizing parts 5dc1a-5dc3a and the upstream side wall surface of minimizing parts 5dc1b-5dc3b is not chamfering (chamfer) camber profile, but keeps dihedral.
As Figure 15 and shown in Figure 16, the flow velocity minimizing parts 5dc1a-5dc3a of the flow velocity minimizing parts 5dba of partition wall 5da1-5da3, partition wall 5db and partition wall 5dc1-5dc3 is set to radially (center of rotation C1) inclination 45 degree (angle e shown in Figure 15) with respect to the rotating shaft of fan 7, so that the radial outer end of partition wall 5da1-5da3 and flow velocity reduce the radial outer end of parts 5dba and 5dc1a-5dc3a is arranged on its radial inner end with respect to the rotation direction D of fan 7 upstream.
As Figure 15 and shown in Figure 26, form partition wall 5d, so that covering 5 front side (promptly from the side of saw blade housing parts 5a or the left side from Fig. 3) from saw, the user when watching, can see the opposite side of partition wall 5d by floss hole 5c.More specifically, partition wall 5db and partition wall 5dc1 are limited to the gap of the direction extension of the rotating shaft that is parallel to fan 7 between them.In other words, with respect to the direction of the rotating shaft that is parallel to fan 7, partition wall 5db is not overlapping with partition wall 5dc1.Partition wall 5dc2 and contiguous partition wall 5dc3 thereof illustrate identical relation, and other partition wall 5d also is such.Under this set, can form saw by casting and cover 5.The surface that is limited to these gaps between the contiguous partition wall 5d is radially parallel to each other substantially about the rotating shaft of fan 7.
When from its front side (left side of Fig. 3) watch saw when cover 5, the housing parts side end face of guiding parts 5dbb, the 5dc1b of partition wall 5db, 5dc1,5dc2, each among the 5dc2b basically with flow velocity minimizing parts 5dc1a, the 5dc2a of contiguous partition wall 5dc1,5dc2 and 5dc3 and 5dc3a in corresponding one housing parts side end face parallel substantially.Therefore, for example, the angle that guiding parts 5dbb and flow velocity reduce the inner radial zone between the parts 5dba is different with the angle in radially outer zone.For guiding parts 5dc1b and flow velocity minimizing parts 5dc1a, guiding parts 5dc2b and flow velocity minimizing parts 5dc2a and guiding parts 5dc3b and flow velocity minimizing parts 5dc3a also is like this.Under this set, the space between the contiguous partition wall 5d can be effectively utilized with qualification agitates air discharging channel 5c, can will agitate air to agitate air discharging channel 5c to discharge forward in cut direction by this.Herein, each guiding parts 5dbb, 5dc1b, 5dc2b have continuous surface.
To shown in Figure 27, agitating air discharge ports 5c and saw to cover position between 5 the bottom front end (with respect to cut direction) as Figure 19 and Figure 25, on the inwall of saw blade housing parts 5a, forming towards the step 5g of saw blade 4 protrusions.Step 5g is the rear side of above-mentioned groove 5i.That is, when forming groove 5i, also just formed step 5g.Step 5g is so formed, so that the lower end of step 5g is positioned at the back of front end of the opening 6b of base plate 6 in cut direction, rotates when reducing depth of cut even saw blade 4 carries out pivot as shown in figure 26 forward.
As shown in figure 27, protective cover 17 the front end on the moving direction (clockwise direction among Figure 27) that pivots can with in the step 5g of saw blade housing parts 5a adjacency.By this way, step 5g prevents that the pivot that protective cover 17 is done from rotating above scheduled volume on the direction of swaying.
In Fig. 3, fan 7 is centrifugal fans, therefore, agitates air radially outward blowing out towards fan 7.Fan guiding 19 in the shell 2 makes agitates air to flow along the inwall of shell 2, and agitates air to flow to when vortex and agitate air discharge ports 5c.After agitating air to enter to agitate air discharge ports 5c, the flow velocity that upstream side wall surface by bump partition wall 5da1-5da3, the flow velocity of partition wall 5db reduce the upstream side wall surface of parts 5dba and partition wall 5dc1-5dc3 reduces the upstream side wall surface of parts 5dc1a-5dc3a, makes and agitates air to slow down.Then, agitate air to flow through and agitate air discharge ports 5c, enter in the saw blade housing parts 5a along wall surface.Especially, after the wall surface that reduces the continuous guiding parts 5dc1b-5dc3b of parts 5dc1a-5dc3a with flow velocity flows through, the bump flow velocity reduces the air of agitating of parts 5dc1a-5dc3a and arranges into saw blade housing parts 5a.At this moment, because partition wall 5da1-5da3 and flow velocity minimizing parts 5dba and 5dc1a-5dc3a are with respect to the radial skew of the rotating shaft of fan 7, when around the center of rotation C1 of fan 7 at rotation direction D vortex and radially inwardly during guiding (direct), agitate air to be arranged into saw blade housing parts 5a.Because agitate air by this way radially to inside vortex, little from agitating air discharge ports 5c to arrange the amount of agitating air and amount of agitating air and the flow velocity the velocity ratio radially outer zone of saw blade housing parts 5a into, but the amount of agitating air and the flow velocity of specific diameter in interior zone is big.Therefore, when when increasing flow in inner radial zone and guarantee enough flows, agitate the noise of the radially outer region generating of air discharge ports 5c to be inhibited at each, thereby guaranteed again conversely to enter the flow that opening 6b enters groove 6c, as described below.
Should be noted that these effects can make it have the upstream side wall surface and realize only by partition wall 5d is set, this upstream side wall surface extends from the radial skew of the rotating shaft of fan 7 and towards the direction opposite with rotation direction D.Yet, in the present embodiment, (especially the flow velocity of partition wall 5dc1-5dc3 reduces the downstream wall surface of parts 5dc1a-5dc3a to the downstream wall surface of partition wall 5d, and the flow velocity of partition wall 5db reduces the downstream wall surface of parts 5dba) also with respect to radial skew, to extend, shown in Figure 20-24 with respect to rotating shaft direction D.Therefore, the upstream side wall surface is parallel with the downstream wall surface.This configuration guarantees to have enough spaces to be used for air discharge ports 5c, and, can form simultaneously be shape that the rotating shaft with respect to fan 7 tilts agitate air discharge ports 5c.This makes conversely also and can will agitate air to arrange into saw blade housing parts 5a and discharge forward towards cut direction along guiding parts.
Because the upstream side wall surface of guiding parts 5dbb and 5dc1b-5dc3b tilts with respect to the rotating shaft of fan 7, so that housing parts side end is positioned at the downstream of fan side end with respect to rotation direction D, the air of agitating that flows through along guiding parts 5dbb and 5dc1b-5dc3b guides forward in cut direction, advances saw blade housing parts 5a side by side.The air of agitating of discharging clashes into the fan side side (Figure 27) of the protective cover 17 among the saw blade housing parts 5a and the fan side side (Figure 25) of saw blade 4 at a certain angle, and flows through along these sides.When from center of rotation C1 (Figure 15) when watching major part agitate air to flow through to rotating shaft 20 along these sides.The opening 6b that agitates air flow base plate 6 that some have been blown over along the side of protective cover 17 and saw blade 4.
Along with the increase of depth of cut, the part of the saw blade 4 of contact cutting object also increases about cut direction.In this case, saw blade 4 blocks the air of agitating more, and prevents that these air from passing the side (front side of drawing or the left side among Fig. 3 among Fig. 2) that the forward position of saw blade 4 and the space between the cutting object flow to the saw blade 4 relative with shell 2.Therefore, agitate air more effectively to flow to the opening 6b of base plate 6.Particularly, when depth of cut during, agitate the air most probable to flow into the opening 6b of base plate 6 near the depth capacity shown in Fig. 2.Equally; as shown in figure 27; when depth of cut has been rotated near depth capacity and protective cover 17 when being contained in the saw lid 5 shown in Figure 27; major part is discharged into the fan side side of agitating air impact protective cover 17 in the saw blade housing parts 5a; along side diffusion, and in cut direction, flow forward.After passing saw blade housing parts 5a and protective cover 17, the air of some diffusions covers 5 rear end discharging from saw in cut direction.Flow to from the rear end air discharged on the rear portion of base plate 6, prevent that sawdust from piling up in this part.
As shown in figure 27, protective cover 17 has the bent limit 17b that limits cut-off parts, and this cut-off parts prevents that protective cover 17 from covering the whole air discharge ports 5c that agitates (even when protective cover 17 and step 5g keep in touch, as shown in figure 27).This makes agitates side that air can impact protector cover 17 and flows through along the side of protective cover 17, and agitates air directly from agitating air discharge ports 5c discharging, slides reposefully with the opening 6b towards base plate 6.
On the other hand, when covering 5, saw upwards is pivoted when reducing depth of cut around as shown in Figure 26 rotating shaft 20, flow in the opening 6b of base plate 6 along the side of saw blade 4 from the airborne part of agitating of agitating air discharge ports 5c discharging, and remaining agitates air impact step 5g.The air of agitating of bump step 5g flows downward along step 5g, then flows to the opening 6b of base plate 6 in cut direction forward.
Be discharged into the end face of agitating the air impact cutting object in the opening 6b in this way and blow sawdust on it off, prevent in cutting operation process sawdust on the cross spider of the bottom surface (cutting zone) of the edge of saw blade 4 and base plate 6 or near accumulation.Therefore, the observability of cutting zone and the observability of the mark line in the cutting area are improved, thereby have improved the efficient of cutting operation.
The air of agitating that has clashed into the end face of cutting object flows in the groove 6c along the end face of cutting object subsequently.Groove 6c with respect to the width of the direction parallel width less than opening 6b with the rotating shaft of saw blade 4, groove 6c is so formed, so that a pair of dotted line extends from the side of saw blade 4 and the cross spider of bottom surface 6a that is arranged in the base plate 6 of groove 6c in cut direction.Therefore, the air of agitating that flows in the groove 6c is directed towards cut direction, and discharges forward from the front end of base plate 6.As a result, discharging agitates air to blow sawdust off and prevent that sawdust from piling up on the cutting object of base plate 6 fronts.Particularly,, agitate air on the mark line of drawing on the end face of cutting object, to flow, blow sawdust off, improved the efficient of cutting operation from mark line because groove 6c is positioned at from the dotted line of saw blade 4 extensions.In addition, must be enough to make groove 6c to be positioned on the dotted line that extends from saw blade 4 (even when saw blade 4 tilts as mentioned above) because the width of groove 6c is big, so the cutting operation that also can tilt effectively.
Because the bottom surface (Figure 14) of prerotation vane 16 flushes with the end face of aforesaid groove 6c substantially, can not block and be not directed to sheet 16 from the front end discharging of base plate 6 so flowed into the air of agitating of groove 6c.
As mentioned above, the border that flow velocity reduces the targeting part 5dc1b-5dc3b of the upstream side wall surface of part 5dc1a-5dc3a and partition wall 5dc1-5dc3 is not the chamfering that demonstrates arcuate flanks, but the angle is arranged.If the border is a chamfering, then flow velocity reduces the surface area minimizing of part 5dc1a-5dc3a, so that agitate air to discharge the housing parts of falling saw blade 5a by agitating air discharge ports 5c, and insufficient bump flow velocity reduces part 5dc1a-5dc3a.In this case, agitate air can fully not slow down, thereby can not produce big noise.Yet in this embodiment, such problem will solve by making the border maintain the angle.
Because agitate air discharge ports to limit by a plurality of partition wall 5d, guaranteed that saw covers 5 intensity, guarantee to agitate the sufficient area of air discharge ports 5c simultaneously.Because all partition wall 5d are formed the rotating shaft radial skew with respect to fan 7, so the stiffening effect of partition wall 5d reduces.Yet targeting part 5dbb and 5dc1b-5dc3b have improved the stiffening effect of partition wall 5d, and this targeting part 5dbb and 5dc1b-5dc3b form with respect to the rotating shaft inclination of fan 7 and with some partition wall 5d are whole.
When locking in cutting operation process during saw blade 4, load is put into saw via bearing 11,12 and 14 and covers on 5, firmly orders about gear 9 and pinion 8 is separated from each other it.That is, on load is placed near the center of rotation C1 with the coaxial fan 7 of pinion 8, be placed near the center of rotation C2 with the coaxial saw blade 4 of gear 9 simultaneously on.Yet, according to present embodiment, as shown in Figure 25, partition wall 5dc1-5dc3 with targeting part 5dc1b-5dc3b is set on these zones, and especially improved reinforcement (reinforcement) effect in these zones of placing big relatively load, the service life of having improved saw blade 5.
Because agitate air discharge ports 5c radially to install around the center of rotation C1 of fan 7; so by agitating the side of agitating air impact saw blade 4 or protective cover 17 of any discharging among the air outlet 5c; and along in the inlet opening 6b of side, and do not consider depth of cut.Therefore, no matter depth of cut how, has all been improved cutting operation.
As mentioned above, according to present embodiment, the air of agitating that is produced by fan 7 makes motor 1 cooling, flows through groove 6c, and flows out from the front end of base plate 1.The air of agitating from the front end of base plate 1 blows dust off from the end face of cutting object, thereby prevents that dust from piling up on the mark line on the cutting object.Therefore, can prevent that mark line from being covered by dust and other dirt of piling up on cutting object, thereby improve cutting efficiency.Because dust and dirt are blown off in cutting operation process, so needn't be for dust is removed and stopped cutting operation from cutting object.By this way, can improve the efficient of cutting operation.And, owing to agitate air opening discharging from the front end that is positioned at base plate 1 after, therefore needn't be provided for guiding the isolation catheter of agitating air by the groove 6c that in the 6a of the bottom surface of base plate 6, forms.Therefore, reduced the number of assembly, thereby improved efficiency of assembling and reduced cost.Equally, such conduit will not be an obstacle for the relation of the position between the edge of visually confirming mark line and saw blade.
Though should be noted in the discussion above that the partition wall 5dc1-5dc3 of present embodiment has flow velocity and reduces part 5dc1a-5dc3a and targeting part 5dc1b-5dc3b.Partition wall 5dc1-5dc3 only has targeting part 5dc1b-5dc3b.Same use this structure, can will agitate air to pass through the opening 6b of base plate 6 and groove 6c front end discharging from base plate 6.
The air of agitating that is discharged in the opening 6b can assembly be set at 6a place, the bottom surface of base plate 6, be used for covering groove 6c, as long as can cover groove 6c by groove 6c and when the front end of base plate 6 blows forward.
In this embodiment, saw cover 5 and is connected to base plate 6, and shell 2 covers 5 and is connected to base plate 6 via sawing.Yet, the invention is not restricted to this layout.For example, shell 2 can be directly connected to base plate 6, or base plate 6 can be connected to respect on the shell 2 irremovable assemblies.
Then, will be referring to Figure 29 to Figure 34 description portable electric annular saw according to a second embodiment of the present invention.In this embodiment, add that with identical reference marker " 100 " represent corresponding to the assembly of first embodiment.For example, shell 102, handle 103, agitate air discharge ports 105c, partition wall 105d, base plate 106, opening 106b, protective cover 117 or the like shown in these figure.When agitating air in cut direction, to flow to opening 6b forward, agitate air to flow to opening 106b forward along the outer wall of the lid of the saw in second embodiment that describes subsequently 105 by the lid of the saw among first embodiment 5.
As shown in Figure 29, groove 106c is formed on the bottom surface 106a of base plate 106, to be communicated with opening 106b.When cut direction is watched, groove 106c extends to the front end of base plate 106 from the front end of opening 106b.As in first embodiment, groove 106c is located at cut direction from the dotted line of saw blade 4 extensions, and its width is bigger than the thickness of saw blade 4.The width of groove 106c is enough big, is enough to make the dotted line that laterally extends from saw blade 4 in cut direction with respect to groove 106c in groove 106, even when the maximum of the angle of inclination of saw blade 4.In other words, with respect to groove 106c laterally, the mark line on the cutting object is positioned at groove 106c, even when the maximum of the angle of inclination of saw blade 4.Base plate 106 is connected to shell 102 and/or saw covers 105.
As shown in figure 31, peripheral wall 105A is set to saw in the end near shell 102 and covers on 105.Peripheral wall 105A comprises a plurality of a plurality of partition wall 105d that agitate air discharge ports 105c that are used for limiting.As shown in Figure 29, partition wall 105d tilts towards base plate 106, and especially the cutting zone in the opening 106b tilts.Agitate air discharge ports 105c to be positioned at, and separate with respect to direction parallel and fan 7 with the rotating shaft of fan 7 with respect to radially locating outside the axial rotary of fan 7.
As shown in Figure 31 and Figure 32, partition wall 105b is arranged between saw blade housing parts 105a and the shell 102, so that saw blade housing parts 105a is separated with shell 102.Partition wall 105b stops and prevents to agitate air W to flow among the saw blade housing parts 105a.Partition wall 105b has near the inclined wall 105j that agitates to lay the air discharge ports 105c.Inclined wall 105j tilts towards the direction that the bottom surface 106a of the blade edge of saw blade 4 and base plate 106 intersects, so that the distance between the side of inclined wall 105j and saw blade 4 is towards with respect to outside radially the reducing gradually in the center of fan.As shown in Figure 32, when watching in cut direction, groove 105m cover in 105 the front side at saw and forms, and is used for making and agitates air W to pass through wherein.
Use this structure, the air W that agitates that enters peripheral wall 105A inside hits on partition wall 105b, and along sloped wall surface 105j towards saw blade 4 side flow.By this way, agitate air W to be guided towards opening 106b.After this, agitate air W to pass and agitate air discharge ports 105c and groove 105m, in cut direction, cover and 105 discharge forward (right side towards Figure 30) from saw.
Be discharged into the air W that agitates that saw cover 105 outside and also flow, clash into the end face of the cutting object in the zone that is arranged in opening 106b, then scatter towards the opening 106b of base plate 106.Then, agitate air W, then agitate the front end discharging of air W along the end face of cutting object from base plate 106 through the space between the end face of groove 106c and cutting object.The result, agitate air W to blow dust off and prevent that dust from piling up on the end face of the cutting object in the zone that is arranged in opening 106 and when the zone at the front side place that is arranged in base plate 106 when cut direction is watched, thereby improved the observability of mark line and the efficient of cutting operation.
Because partition wall 105b and agitate air discharge ports 105c so to be laid discharges forward when watching in cut direction with box lunch and agitates air W, so agitate air W can not blow to the user in cutting operation process.
As implied above, because being set to saw, sloped wall surface 105j cover on 105, base plate 106 opening 106c guides and agitates air with tomorrow, piles up on cutting object so can prevent sawdust effectively, and does not increase the quantity of assembly.
Then, the portable electric annular saw of a third embodiment in accordance with the invention will be described referring to Figure 35.The portable electric annular saw of the 3rd embodiment is similar to the portable electric annular saw of above-mentioned first embodiment or second embodiment, and the groove difference that forms in base plate is only arranged.As shown in figure 35, the base plate 206 of present embodiment is formed with groove 206c, and groove 206c increases with respect to the width of the direction parallel with the rotating shaft of saw blade 4 direction towards saw blade 4, thereby the shell side edge of groove 206c is tilted towards shell 202.Such groove 206c helps guiding to agitate air, and this agitates air to be discharged into the space of close shell 202.As shown in Figure 35, present embodiment comprises prerotation vane 216, and this prerotation vane 216 has vertical cutting targeting part 216a and 45 degree cutting targeting part 216b.
Here, can the portable electric annular saw of the 3rd embodiment be changed, so that another side of groove 206c is outward-dipping towards saw blade 4, promptly side tilts to the direction opposite with shell 2 towards saw blade 4.Also may so form groove 206c, so that the degree of depth of groove 206c is towards the direction increase of opening 206b.In this case, the upper wall of groove 206c is located on the bottom surface 206a near the base plate 206 of the position of opening 206c.By this way, also may increase the amount of agitating air that is imported in the groove 206c.
Then, will portable electric annular saw according to the 4th to the 6th embodiment of the present invention be described in proper order with this.The portable electric annular saw of the 4th to the 6th embodiment is any of first to the 3rd embodiment that is provided with the blowing governor motion, wherein should will be used for adjusting the amount of agitating air of discharging forward from the front end of base plate describing subsequently by blowing governor motion.This blowing governor motion is especially effective to the working environment that wherein must avoid dust distribution and scattering.In the 4th to the 6th embodiment, the blowing governor motion is arranged on the base plate place.
At first, with reference to the portable electric annular saw of Figure 36 to 37 detailed description according to the 4th embodiment.The blowing governor motion is included in the groove 306f that forms among the bottom surface 306a of base plate 306, the screw 352 that is formed with long through hole 351a and is contained in the protector 351 among the groove 306f and meshes by hole 351a and base plate 306.Groove 306f forms with respect to the back of cut direction at hole 306d.Groove 306f is communicated with groove 306c fluid, and has the degree of depth degree of depth identical substantially with groove 306c.Slide along groove 306f between non-protective position that protector 351 can be shown in Figure 36 and the protective position shown in Figure 37.Screw 352 locks and opens the sliding position of protector 351 with respect to base plate 306.That is, slidably, and fix by trip bolt 352 by its position in the length range of hole 351a for protector 351.
When protector 351 is set to non-protective position shown in Figure 36, the air of agitating towards the opening 306b of base plate 306 discharging can flow through groove 306c, and when in cut direction, watching, blow forward (blow) from the front end of base plate 306, thereby prevent the sawdust accumulation in the mode of in above embodiment, describing.On the other hand, when protector 351 was set to protective position shown in Figure 37, protector 351 blocked groove 306c, so that agitate air impact protector 351, and can not pass through groove 306c.Therefore, prevent to agitate air to blow forward, thereby prevent that sawdust from scattering at the front end place of base plate 306 from the front end of base plate 306.By this way, may optionally prevent scattering of sawdust selectively.
In addition, if the user is arranged on position between protective position and the non-protective position with protector 351, then be adjusted by the amount of agitating air that groove 306c discharges forward.That is, the user can use hair-dryer mechanism, and the dispersion of sawdust is minimized.
As mentioned above, according to present embodiment, the air-flow guiding mechanism can be adjusted the amount of agitating air that blows out from the opening of the front end that is positioned at base plate, can prevent to scatter in the work-yard that sawdust should avoid sawdust to disperse therein.Equally, may prevent that sawdust from piling up on the mark line on the cutting object, agitate the flow of air that the dispersion of sawdust is minimized by minimizing simultaneously.Requirement according to the work-yard can prevent selectively that sawdust from scattering.
Then, will be referring to Figure 38 to Figure 40 description portable electric annular saw according to a fifth embodiment of the invention.According to the blowing governor motion of present embodiment comprise the external screw thread hole 406f, the protector 451 that is formed with through hole 451a that form at base plate 406 that are arranged in corresponding to the position of groove 406c, insert through hole 451a and with the screw 452 of external screw thread hole 406f engagement and the spring of around screw 452, installing 453.Protector 451 has L shaped cross section, and comprises towards the support section of horizontal direction extension and the guard section that extends towards vertical direction.The width of protector 451 (in the direction perpendicular to the paper at Figure 38 place) is substantially equal to the width (being parallel in the direction of rotating shaft of fan 7) of groove 406c.Spring 453 is placed between the end face of protector 451 and base plate 406, and upwards promotes protector 451.Base plate 406 is formed with through hole 406d, and wherein the guard section of protector 451 can pass through hole.By rotating screw 452, the user can make between protector 451 non-protective position shown in Figure 38 and the protective position shown in Figure 40 and slide up and down.
When protector 451 is set to non-protective position shown in Figure 38, agitates air can flow through the groove 406c that forms at the bottom surface of base plate 406 406a, and in cut direction, blow forward from base plate 406.On the other hand,, then agitate air impact protector 451, therefore in cut direction, can not be guided forward if protector 451 is set to the protective position shown in Figure 40.Therefore, do not have to agitate air lead-in groove 406c, and prevent that its front end from base plate 406 from blowing out forward.By this way, prevent that sawdust from scattering in cutting operation process.
And when protector 451 was set to adjustment position shown in Figure 39, the amount of agitating air of discharging forward from base plate 406 reduced.Therefore, can prevent that sawdust from piling up on mark line, the dispersion of sawdust is minimized.
Then, with reference to Figure 41 to Figure 44 description portable electric annular saw according to a sixth embodiment of the invention.Portable electric annular saw according to present embodiment comprises the prerotation vane 516 that the blowing governor motion is installed.As shown in Figure 41 and Figure 43, prerotation vane 516 has non-protection side 516A and protection side 516B, is releasably attached to by screw 18 on the end face of base plate 506.Usually, prerotation vane 516 is installed on the base plate 506, and simultaneously non-protection side 516A is towards as shown in Figure 41 below.Yet when blower mechanism was not used, prerotation vane 516 was upside down, and prerotation vane 516 is installed on the base plate 506, protected side 516B simultaneously towards as shown in Figure 43 below.
The non-protection side 516A of prerotation vane 516 is provided with targeting part 516a and 516b.The marginal position of saw blade 4 when targeting part 516a is used for indicating saw blade 4 to be in vertical position.The marginal position of saw blade 4 when targeting part 516b is used to indicate saw blade 4 to tilt to maximum angle 45 and spends.Protrude (projection) 516a1 and 516b1 and protrude from the bottom surface of targeting part 516a and 516b respectively, and extend, thus groove 516c in the middle of the definition and the both sides of targeting part 516a and 516b towards cut direction.When prerotation vane 516 is installed on the base plate 506, non-protection side 516A protrudes the horizontal plane that 516a1 and 516a2 extend to the bottom surface 506a that is substantially equal to (flushing with it) base plate 506 when as shown in Figure 41 below simultaneously.
On the other hand, the protection side 516B of prerotation vane 516 is provided with targeting part 516d and 516e.The marginal position of saw blade 4 when targeting part 516d is used to indicate saw blade 4 to be in vertical position.The marginal position of saw blade 4 when targeting part 516e is used to indicate saw blade 4 to tilt to maximum angle 45 and spends.Guard section 516h is placed to the protection side 516B of prerotation vane 516.The width of guard section 516h is substantially equal to the width of groove 506c.When prerotation vane 516 is installed on the base plate 506, non-protection side 516B is when as shown in Figure 42 below simultaneously, and guard section 516h extends to the horizontal plane of the bottom surface 506a that is substantially equal to base plate 506.
Use this structure, when prerotation vane 516 is installed on the base plate 506, non-protection side 516A agitates air to flow through groove 506c and 516c, and blows forward from the front end of base plate 506 when as shown in Figure 41 below simultaneously.On the other hand, when prerotation vane 516 is installed on the base plate 506, protect side 516B simultaneously when as shown in Figure 43 below, guard section 516h blocks and agitates air, and prevent to agitate air to flow through groove 506c, so that agitate air not discharge from the front end of base plate 506.By this way, blower mechanism can be opened or close in the side of the prerotation vane 516 by selecting to be installed to base plate 506.Here, prerotation vane 516 is installed on the base plate 506 by screw 18, and wherein screw 18 was inserted among through hole 516f or the hole 516g.When non-protection side 516A uses through hole 516f during towards the below, when protection side 516B uses through hole 516g during towards the below.
Then, will portable electric annular saw according to the 7th to the 9th embodiment of the present invention be described in proper order with this.Portable electric annular saw according to these embodiment all comprises the blowing governor motion that is set to the saw lid.
At first, will be referring to Figure 45 to Figure 48 description portable electric annular saw according to a seventh embodiment of the invention.This portable electric annular saw is similar to the portable electric annular saw of first embodiment, and difference only is that it comprises the blowing governor motion.The blowing governor motion comprises the protector 651 that can slide up and down along step 5g, and wherein step 5g cover formation on 5 at saw, extends in vertical direction.Protector 651 forms to have step slipper 651A and saw and covers the L shaped of slipper 651B.Step slipper 651A contact (contact) step 5g also slides along step 5g, and saw cover slipper 651B contact saw and cover 605 and cover 605 slips along sawing.Saw covers 605 and is formed with vertically extending groove (slot) 605k (Figure 47 and Figure 48).Screw 652 was inserted groove 605k and was covered slipper 651B engagement with saw.Use this structure, protector 651 can slide up and down in the length range of groove 605k, and by tightening the position of screw 652 fastening protectors 651.
As shown in figure 45, when the top of screw 652 adjacent channels 605k, protector 651 is placed to the non-protective position into tip position.In this case, after the step slipper 651A of crash spare 651 or when not having the step slipper 651A of crash spare 651, agitate the opening 6b of air flow base plate 6, flow forward in cut direction.Therefore, after flowing through groove 6c, agitate air to blow out from the front end of base plate 6.
On the other hand, when screw 652 during in abutting connection with the lower end of as shown in figure 46 groove 605k, it is the protective position of bottom position that protector 651 is positioned at.In this case, what flow to opening 6b agitates air impact protector 651, so that agitate air not flow forward in cut direction.Therefore, agitate air can not enter groove 6c, thereby agitate air can not discharge from the front end of base plate 606.
And, if protector 651 is placed between non-protective position and the protective position, then adjust the amount of agitating air of discharging forward from the front end of base plate 606.Therefore, can prevent that sawdust from piling up on the mark line of cutting object, the dispersion of sawdust is minimized.
Here, because step 5g guides protector 651 when protector 651 slides up and down, so have only single screw 652 protector 651 fully could be fastened on the appropriate location.
Then, with reference to the portable electric annular saw of Figure 49 to Figure 52 description according to the eighth embodiment of the present invention.This portable electric annular saw is similar to the portable electric annular saw of the 7th embodiment, and difference only is the direction that protector slides.
Particularly, the blowing governor motion of present embodiment comprises protector 751, and it can cover surface front and back slip in cut direction of 705 along saw.Protector 751 is quadrangle basically, have first side that is in substantially parallel relationship to step 705g, substantially be parallel to second side of first side, be parallel to the 3rd side of second side and substantially along the 4th curved side of the radially outward edge of partition wall 5d.Shown in Figure 50 to Figure 52, saw covers 705 and is formed with a pair of groove 705k, the 705k that is parallel to the cut direction extension.Pair of screws 752 was inserted groove 705k, 705k respectively, and meshed with protector 751.Use this structure, protector 751 can slide front and back in the length range of groove 705k, and by tightening the position of screw 752 fastening protectors 751.
As shown in figure 49, when the front end of screw 752 adjacent channels 705k, protector 751 is positioned at non-protective position.In this case, agitate air discharge ports 5c to open fully, and do not blocked by protector 751, thereby, agitate air can in cut direction, flow to the opening 6b of base plate 6 forward.Therefore, agitate air after flowing through groove 6c, can to discharge from the front end of base plate 6.
On the other hand, as shown in figure 50, when the left end of screw 752 adjacent channels 705k, protector 651 is positioned at protective position.In this case, protector 751 is closed the major part of agitating air discharge ports 5c.Therefore, agitate air can not flow forward, promptly flow to groove 6c, and prevent that its front end from base plate 6 from blowing out forward.If protector 751 is placed between non-protective position and the protective position, then regulate the amount of agitating air of discharging forward from base plate 706.
Then, will be referring to the portable electric annular saw of Figure 53 to Figure 55 description according to the ninth embodiment of the present invention.The portable electric annular saw of present embodiment is similar to the portable electric annular saw of second embodiment, and difference only is to comprise the blowing governor motion.
The blowing governor motion comprises protector 851, and it is placed in slidably and is arranged on the outer surface of outer wall 805A that saw covers 805 front side (when when cut direction is watched).More specifically, protector 851 is formed with vertically extending groove 851a, and screw 852 was inserted groove 851a and meshed with outer wall 805A.
Shown in Figure 53, when the lower end of screw 852 and groove 851a in abutting connection with the time, protector 851 is in the non-protective position for tip position.In this case, the groove 805m that cover formation of 805 front side at saw is not covered by protector 851.Therefore, can pass through groove 805m, flow to base plate opening 6b forward, and the front end from base plate 6 blows out after by groove 6c from the air of agitating of agitating air discharge ports 805c discharging.
On the other hand, shown in Figure 54, when the top of screw 852 and groove 851a in abutting connection with the time, screw 852 is in the protective position for bottom position.In this case, protector 851 covers groove 805m, therefore, is blocked by protector 851 from the air W that agitates that agitates air discharge ports 805c discharging, thereby can prevent in its groove 6c that flows into base plate 6.Therefore, can prevent to agitate the front end discharging of air from base plate 6.
If protector 751 is placed between non-protective position and the protective position, then regulate the amount of agitating air of discharging forward from base plate 706.
Though described one exemplary embodiment more of the present invention in detail, those of skill in the art will understand, can make a lot of possible modifications and variations to these one exemplary embodiment, still keep a lot of new feature of the present invention and advantage simultaneously.
Claims (36)
1, a kind of portable electric cutting device comprises:
Shell;
Be used for the saw blade that cutting object cut along cut direction;
Have the part of being used for and hold the saw lid of the saw blade housing parts of described saw blade;
Be connected at least one base plate in described shell and the described saw lid, described base plate has the bottom surface of sliding on described cutting object, and described bottom surface is formed with opening, and Open Side Down protrudes the described bottom surface that surpasses described base plate by described for described saw blade; And
Be placed in the fan of described enclosure, described fan produces as the air-flow of agitating air, wherein
Described saw lid has the wall that is placed between described fan and the described saw blade housing parts, described wall is provided with a plurality of partition walls that limit a plurality of floss holes, and the air of agitating that produces in described shell by described a plurality of floss holes discharges forward towards the opening that forms in described base plate in described cut direction.
2, portable electric cutting device according to claim 1, wherein said fan is agitated air along the direction of rotation rotation with generation; In a plurality of partition walls each is extended from fan side towards saw blade housing parts side, and has the upstream side surface at the upstream side of described fan direction of rotation; At least one in the described partition wall is first partition wall with sloping portion, the described relatively fan rotation axis in the upstream side surface of described sloping portion tilts, thereby the saw blade housing parts side on upstream side surface part is positioned at the downstream of the fan side part on upstream side surface with respect to the direction of rotation of fan; And the air of agitating that produces in described shell enters in the saw blade housing parts of described saw lid by described floss hole.
3, portable electric cutting device according to claim 2, in the wherein said partition wall at least one is second partition wall that is positioned at described fan rotation axis rear side with respect to cut direction, and the upstream side surface of each second partition wall is in substantially parallel relationship to the direction of rotation of described fan and extends.
4, electric cutting device according to claim 2, the upstream side of at least one partition wall surface radially extending of fan rotation axis relatively wherein with an angle, thus the radially outer on upstream side surface is positioned at the upstream of the inner radial on upstream side surface with respect to the direction of rotation of described fan.
5, portable electric cutting device according to claim 4, the upstream side of any partition wall surface radially extending of fan rotation axis relatively wherein with an angle, thus the radially outer on upstream side surface is positioned at the upstream of the inner radial on upstream side surface with respect to the direction of rotation of described fan.
6, portable electric cutting device according to claim 4, wherein the upstream side of any partition wall relative fan rotation axis in surface radially extends with the miter angle degree.
7, portable electric cutting device according to claim 1, the described wall of wherein said saw lid also is formed with ladder in first side, and described ladder has the lower end, and described lower end is located at the rear portion of the opening that forms in the substrate with respect to described cut direction.
8, portable electric cutting device according to claim 7, also comprise light irradiation device, described light irradiation device is at the front end along irradiated substrate and cutting object in the substrate region in front of cut direction, the described wall of wherein said saw lid also is formed with groove on second side relative with described first side, and the ladder of described wall forms owing to forming described groove, described groove has the flat that extends in parallel with described saw blade, and described light irradiation device is connected to the flat of described groove.
9, portable electric cutting device according to claim 7, also comprise the depth of cut governor motion, wherein said saw covers in the front side of described substrate and rear side and is connected to substrate, described saw lid rotates with respect to the preceding end pivoting of described substrate around the saw lid, and described depth of cut governor motion is arranged between the rear side and saw lid of described substrate, thereby around the preceding end pivoting rotation that saw covers the rear end of sawing lid is moved up and down by making to saw to cover with respect to substrate, in order to regulate depth of cut, described depth of cut governor motion covers at the described saw of the position of needs upper support with respect to the pivot direction of saw lid.
10, portable electric cutting device according to claim 1, wherein said saw lid also comprises another wall that is arranged between described shell and the described saw cover housing part, described another wall extends with an angle with respect to described cut direction, thus another wall with respect to the rotating shaft of described fan radially towards the more approaching described saw blade of radial outer end.
11, portable electric cutting device according to claim 1, wherein said partition wall extends towards the opening that forms in described substrate.
12, portable electric cutting device according to claim 1 also comprises the motor that is used for driving described saw blade and the rotation of described fan, and described fan generation is described agitates air so that the cooling of described motor.
13, portable electric cutting device according to claim 1, the bottom surface of wherein said substrate is formed with the air flow channel with described open fluid communication, the front end of described air flow channel along cut direction from described opening extends to the rear end of described substrate, and described groove opens wide the front end of described substrate.
14, portable electric cutting device according to claim 13, wherein each partition wall has and the relative downstream side surface in described upstream side surface, and described downstream side surface is parallel with corresponding upstream side surface substantially.
15, portable electric cutting device according to claim 13, wherein said first partition wall is positioned at the front side of described fan rotation axis with respect to cut direction.
16, portable electric cutting device according to claim 13, wherein said first partition wall has flow velocity and reduces parts, the rotating shaft that the upstream side surface that described flow velocity reduces parts is in substantially parallel relationship to described fan extends, described flow velocity reduces parts and is arranged on fan side, and sloping portion is arranged on saw blade housing parts side, wherein said sloping portion is a guiding parts, and described guiding parts reduces the upstream side surface of parts and extends with an angle with respect to flow velocity.
17, portable electric cutting device according to claim 16, wherein said flow velocity reduce parts and are connected to described guiding parts, and described flow velocity to reduce border between parts and the described guiding parts be the angled profile of chamfering not.
18, portable electric cutting device according to claim 16, wherein each partition wall has first end in saw blade housing parts side, and has second end at fan side with respect to first end, and first end of first partition wall defines at interval betwixt with second end that is positioned at the adjacent sub next door in the first partition wall downstream with respect to direction of rotation, and described interval extends through described wall along the direction that is parallel to described fan direction of rotation.
19, portable electric cutting device according to claim 18, wherein said interval is limited to the upstream side surface of one first partition wall and the downstream side surface of another first partition wall of contiguous described first partition wall, the extension that is parallel to each other substantially of the upstream side surface of described first partition wall and the downstream side surface of described another first partition wall.
20, portable electric cutting device according to claim 13, wherein said air flow channel are positioned on the dotted line that extends along cut direction from saw blade, and width is greater than the thickness of the saw blade sword of saw blade.
21, portable electric cutting device according to claim 20, also comprise the leaning device that is arranged between described saw lid and the substrate, described leaning device makes angle that saw lid tilts to need and supports the saw lid with the angle of described needs, though wherein when saw blade inclination maximum angle described air flow channel also be positioned on the described dotted line.
22, portable electric cutting device according to claim 13, also comprise prerotation vane, described prerotation vane removably is connected to the front end of described substrate, is used to indicate the position of the saw blade sword of described saw blade, and the bottom surface of described prerotation vane is shaped on the groove that is communicated with described air flow channel fluid.
23, portable electric cutting device according to claim 13, also comprise the stiffener that is arranged on the described substrate top surface, described stiffener is in the zone of described air flow channel vertical direction and do not form between the zone of vertical direction of air flow channel and extend.
24, portable electric cutting device according to claim 23, also comprise the leaning device between the front side that is arranged on described saw lid and substrate, described leaning device makes angle that saw lid tilts to need with respect to vertical direction and supports the saw lid with the angle of described needs, described leaning device has pin, described saw lid is around described pin incline, and described pin is fixed by described stiffener.
25, portable electric cutting device according to claim 24, wherein said leaning device also comprises hang plate, described hang plate is protruding upward from described substrate, and be shaped on described pin be the arcuate socket at center and by described arcuate socket in the lock screw of front end with saw lid engagement, described lock screw will be sawed the angle that lid is fixed on to be needed when fastening, and described stiffener is connected to described hang plate.
26, portable electric cutting device according to claim 13 also comprises the blowing governor motion, and described blowing governor motion is regulated selectively by the amount of agitating air of described air flow channel from the front end discharging of described base plate.
27, portable electric cutting device according to claim 26, wherein said blowing governor motion is set on the described base plate.
28, portable electric cutting device according to claim 27, wherein:
The bottom surface of described base plate also is formed with the gathering sill that is communicated with described air flow channel fluid, and described gathering sill has identical with the described air flow channel basically degree of depth; And
Described blowing governor motion comprises the protector that is placed in the described gathering sill, described protector can slide along described gathering sill between protective position and non-protective position, wherein at described protective position place, described protector is closed described air flow channel, at described non-protective position place, described protector is opened described air flow channel.
29, portable electric cutting device according to claim 28, wherein said blowing governor motion also comprises fixture, it is fixed to described protector selectively on the position that needs and from the position of needs and unclamps.
30, portable electric cutting device according to claim 27, wherein:
Described base plate is formed with the pilot hole that penetrates described base plate, and described pilot hole is communicated with described air flow channel fluid;
Described blowing governor motion comprises protector and keeper;
Described protector inserts described pilot hole and slides along described pilot hole between protective position and non-protective position, wherein at described protective position place, described protector is closed described air flow channel, and at described non-protective position place, described protector is opened described air flow channel; And
Described keeper supports described protector and described protector is navigated to the position of needs.
31, portable electric cutting device according to claim 27, wherein:
Described blowing governor motion comprises protector and connector, described protector has protection side and non-protection side, described connector is detachably connected to described base plate with described protector, makes simultaneously described protection side towards the bottom surface of described base plate with make the bottom surface of described non-protection side towards described base plate selectively;
Described protector has the guard section that is placed on the described protection side, when described protector is connected to described base plate described protection side is towards described bottom surface simultaneously, close described air flow channel, described guard section equates with the width of described air flow channel substantially with respect to the width perpendicular to described cut direction; And
Described protector is formed with groove in described non-protection side, when described protector is connected to described base plate described non-protection side is towards described bottom surface simultaneously, described groove is communicated with described air flow channel fluid, makes the described air of agitating flow through described groove and described air flow channel.
32, portable electric cutting device according to claim 26, wherein said blowing governor motion is set to described saw and covers.
33, portable electric cutting device according to claim 32, wherein:
Described saw lid comprises the protruding part that protrudes towards described saw blade, and described protruding part is formed with the groove that extends towards perpendicular to the direction of described cut direction;
Described blowing governor motion comprises protector, described protector slides along described groove at the protective position on the air duct with between the non-protective position outside the air duct, the described air of agitating is introduced into air flow channel by described air duct, and the described protector that wherein is positioned at described protective position place prevents that the described air of agitating from entering described air flow channel; And
Described protector has L shaped cross section, and described L shaped cross section has along first slipper of described protruding part slip and covers second slipper of slip along described saw.
34, portable electric cutting device according to claim 32, wherein said saw lid is formed with the groove that extends in described cut direction, and described blowing governor motion is included in the protector that slides along described groove between protective position and the non-protective position, at described protective position place, described protector covers the described air discharge ports of agitating, at described non-protective position place, described protector is opened the described air discharge ports of agitating.
35, portable electric cutting device according to claim 32, wherein:
Described saw lid is formed with groove, and the described air of agitating flows to described air flow channel by described groove;
Described saw lid is formed with groove; And
Described blowing governor motion is included in the protector that slides along described groove between protective position and the non-protective position, and described protector is closed described groove at described protective position place, and described protector is opened described groove at described non-protective position place.
36, according to any one described portable electric cutting device among the claim 33-35, wherein said blowing governor motion also comprises fixture, and described fixture is fixed to described protector the position of needs selectively and unclamps from the position of needs.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002307696 | 2002-10-22 | ||
| JP2002307696A JP3748073B2 (en) | 2002-10-22 | 2002-10-22 | Electric cutting machine |
| JP2003130822 | 2003-05-08 | ||
| JP2003130820 | 2003-05-08 | ||
| JP2003130821 | 2003-05-08 | ||
| JP2003339939 | 2003-09-30 | ||
| JP2003339940 | 2003-09-30 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100899978A Division CN100467179C (en) | 2002-10-22 | 2003-10-22 | Portable electric cutting device with blower mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1496800A true CN1496800A (en) | 2004-05-19 |
| CN1297375C CN1297375C (en) | 2007-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100899978A Expired - Fee Related CN100467179C (en) | 2002-10-22 | 2003-10-22 | Portable electric cutting device with blower mechanism |
| CNB2003101025332A Expired - Fee Related CN1297375C (en) | 2002-10-22 | 2003-10-22 | Portable electric cutting device with blower mechanism |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100899978A Expired - Fee Related CN100467179C (en) | 2002-10-22 | 2003-10-22 | Portable electric cutting device with blower mechanism |
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| Country | Link |
|---|---|
| JP (1) | JP3748073B2 (en) |
| CN (2) | CN100467179C (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2004142169A (en) | 2004-05-20 |
| JP3748073B2 (en) | 2006-02-22 |
| CN100467179C (en) | 2009-03-11 |
| CN1868645A (en) | 2006-11-29 |
| CN1297375C (en) | 2007-01-31 |
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