CN1943942A - Saw - Google Patents
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- CN1943942A CN1943942A CN 200610141692 CN200610141692A CN1943942A CN 1943942 A CN1943942 A CN 1943942A CN 200610141692 CN200610141692 CN 200610141692 CN 200610141692 A CN200610141692 A CN 200610141692A CN 1943942 A CN1943942 A CN 1943942A
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- saw
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- bowden cable
- base assembly
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Abstract
The present invention provided a saw comprising: a base assembly connected to a mounting portion; a saw unit connected to a support portion which is pivotally mounted on the mounting portion to allow the saw unit to pivot towards or away from the base assembly, the saw unit having an output drive spindle upon which a circular saw blade can be rigidly mounted to be rotationally driven by a motor; the axis of rotation of the drive spindle being substantially parallel to the axis of pivot between support portion and the mounting portion; at least one pivotal guard pivotally mounted on the saw unit which can pivot from a first position, where it surrounds at least a portion of the lower edge of a saw blade when mounted on the spindle, to a second retracted position where the portion of the lower edge of the saw blade is exposed; and a pivotal guard actuating mechanism which is capable of moving the at least one pivotal guard from its first position to its second retracted position when the saw unit is pivoted towards the base assembly; characterised in that the saw unit can move relative to the support portion to change the distance between the axis of rotation of the pivotal guard and the axis of pivot between the support portion and the mounting portion.
Description
Technical field
The present invention relates to have the power saw that cuts with sliding function.
Background technology
Cut saw and comprise the electric motor units that is installed in pivotally on the pedestal.This electric motor units is above the pedestal and can pivot between high position and lower position, described electric motor units is positioned to further from pedestal in this high position, can engage with the workpiece on being positioned at pedestal at this lower position circular saw blade, this circular saw blade is installed on the electric motor units and can be driven rotationally by the motor that is positioned at electric motor units.One spring makes electric motor units to its uppermost position in fig-ure bias voltage.
This saw can have sliding characteristics, and wherein electric motor units can also pass pedestal and slide linearly to carry out sliding cutting except carrying out pivot or cutting the motion.In addition, the saw of these types can comprise and makes them can carry out the mechanism of crosscut (mitre cut) and/or cut sth. askew (bevel cut) on the workpiece that is positioned on the pedestal.Can cut, sliding cutting, cut sth. askew and the saw of crosscut is known as the compound cross-cut saw of slidingtype.
The saw of all these types all comprises the guard member of at least a portion of surrounding the saw blade edge usually, contacts cutting edge so that prevent the operator.Usually, this saw comprise the first half of surrounding cutting tip cutting edge fixedly guard member and can surround the pivot guard member of cutting edge of the latter half of cutting tip.Thereby this pivot guard member can expose the retracted position that can use this cutting tip cut workpiece from the cutting edge that its primary importance of cutting edge of surrounding the latter half of cutting tip is pivoted to the latter half that makes this cutting tip.The purposes of pivot guard member be when not using saw blade, make the cutting edge of the latter half of circular saw blade can be besieged providing protection to the operator, and when this saw blade of needs cuts, the cutting edge of the latter half of this circular saw blade is come out.
The existing multiple mechanism that makes the pivot guard member can be pivoted to retracted position from its primary importance.
WO 98/18588 has described such mechanism of using of being used on the compound cross-cut saw of slidingtype.
WO 98/18588 discloses the compound cross-cut saw of a kind of slidingtype, and this saw comprises pedestal 12 (use with WO 98/18588 in employed identical Reference numeral), and this pedestal 12 has the turntable 14 that is installed in wherein.The enclosing spare 26 of this turntable 14 on being fixed on pedestal 12 makes the compound cross-cut saw of slidingtype can carry out crosscut.Be connected with tilted supporter 16 at the rear portion of this workbench 14, this tilted supporter 16 can pivot around horizontal axis with respect to platform 14.This tilted supporter 16 makes the compound cross-cut saw of slidingtype to cut sth. askew with respect to the pivoting action of platform 14.Two guide rods 34 are installed on this tilted supporter 16 slidably, described guide rod 34 can be flatly backward with to front slide.Described bar 34 makes the compound cross-cut saw of slidingtype can carry out sliding cutting.Electric motor units 36 is installed on the end of guide rod 34 pivotally, and this electric motor units 36 comprises the motor 22 that is used for the circular saw blade 18 of drive installation rotationally on the driving shaft on this electric motor units.Electric motor units 36 makes this saw to cut with respect to the pivoting action of guide rod 34.
Fixedly guard member 40 is installed on electric motor units 36 rigidly, and this is the cutting edge of the first half of guard member 40 encirclement cutting tips 18 fixedly.Pivot guard member 42 is installed on this electric motor units pivotally, thus this pivot guard member 42 can its surround cutting tip the latter half cutting edge primary importance and the cutting edge of the latter half of this cutting tip 18 is exposed be used between the retracted position that cutting is used, pivoting.
Described pivot guard member utilizes mechanical linkage to pivot between two positions of this pivot guard member; this mechanical linkage comprises a series of mechanical arms 48,50 that are connected with saw and mutual pivot, and the cam 52,54 of controlling the motion of described arm 48,50.When electric motor units pivoted downwards, this mechanical linkage made the following cutting edge of saw blade come out owing to this mechanical linkage makes the withdrawal of pivot guard member.
Disclosed saw comprises the rigid mechanical bar in WO 98/18588, and therefore owing to the rigidity characteristics and the mode of operation thereof of mechanical linkage, this saw componet must be designed to adapt with the rigidity and the mode of operation of this mechanical linkage.Equally, use the make of the saw of this rigidity connecting rod also to be restricted.Especially, in WO 98/18588 disclosed design, the distance between the pivot axis of the electric motor units 36 on the bar 38 and the pivot axis of pivot guard member 42 must be maintained fixed.
EP0242733 disclose a kind of with in the WO 98/18588 disclosed different structure that is used for the compound cross-cut saw of slidingtype.
EP0242733 discloses a kind of compound cross-cut saw of slidingtype that comprises pedestal, and this pedestal has the turntable that is installed in wherein.The enclosing spare of this turntable on being fixed on pedestal makes the compound cross-cut saw of this slidingtype can carry out crosscut.Rear portion at this workbench is connected with tilted supporter, and this tilted supporter can pivot around horizontal axis with respect to described.The pivoting action of this tilted supporter with respect to described makes the compound cross-cut saw of slidingtype to cut sth. askew.
Two guide rods are installed on this tilted supporter pivotally, and described guide rod can pivot around an axis between last position and upper/lower positions, and this axis is parallel to the pivot center of the saw blade of this saw.This makes this saw to cut.
Electric motor units is installed on this guide rod slidably, and this electric motor units comprises the motor that is used for driving rotationally circular saw blade, and this saw blade is installed on the driving shaft on the electric motor units 36.Electric motor units makes this saw can carry out sliding cutting along the sliding motion of guide rod.
Fixedly guard member is installed on electric motor units rigidly, and this is the cutting edge of the first half of guard member encirclement cutting tip fixedly.The pivot guard member is installed on electric motor units pivotally, thus this pivot guard member can this guard member that pivots surround cutting tip the latter half cutting edge primary importance and the cutting edge of the latter half of this blade is exposed be used between the retracted position that cutting is used, pivoting.
This pivot guard member utilization is installed in the switch on the handle and pivots between two position, and this handle is mechanically connected on this pivot guard member.In use, thus this switch is pressed and makes pivot guard member withdrawal, and this saw is moved.
Different with the saw among the WO98/18588, the unexposed device that when pedestal pivots, makes this pivot guard member withdrawal when electric motor units.Can not be applied to saw in EP0242733 as use in this mechanical linkage described in the WO98/18588, because the distance between electric motor units and the pivot axis along with electric motor units along the slip of described two guide rods and change, this pivot axis is parallel to the pivot center of cutting tip, and electric motor units pivots to cut toward or away from pedestal around this pivot axis.This design with saw in WO98/18588 is opposite, fixed distance in WO98/18588 between electric motor units and the pivot axis is at the predeterminable range place, this pivot axis is parallel to the pivot center of cutting tip, and electric motor units around this pivot axis towards or pivot to cut away from pedestal.
Summary of the invention
The purpose of this invention is to provide a kind of optional and purposes that for example is used to have at the linkage of the saw that cuts function and sliding function shown in the EP0242733 and more design, so that the pivoting action by saw blade makes at least one pivot guard member move to retracted position from surrounding the position during cutting action.
Therefore, provide a kind of saw, this saw comprises:
Be connected to the base assembly on the installation portion;
Be connected to the saw unit on the support portion, this support portion is installed on the described installation portion so that this saw unit pivotally and can pivots toward or away from described base assembly, this saw unit has output driving shaft, thereby a circular saw blade can be installed in this axle rigidly and upward be driven rotationally by motor, and the pivot center of wherein said driving shaft is basically parallel to the pivot axis between described support portion and the described installation portion;
At least one is installed in the pivot guard member on the described saw unit pivotally, and this pivot guard member can be pivoted to second retracted position that the described described part of sword down that makes this saw blade exposes from the primary importance that this guard member that pivots is surrounded at least a portion of sword under the saw blade when described axle goes up when saw blade is installed in;
Wherein should saw unit can be with respect to the motion of described support portion, with the described pivot center that changes described pivot guard member and the distance between the pivot axis between described support portion and described installation portion;
It is characterized in that, also be provided with pivot guard member actuating mechanism, this actuating mechanism can make described at least one pivot guard member move to its second retracted position from its primary importance when described base assembly pivots in described saw unit.
Description of drawings
Three embodiment of the present invention are described below with reference to accompanying drawings, in the accompanying drawings:
Fig. 1 illustrates the stereogram of first embodiment of saw;
Fig. 2 illustrates the schematic diagram of the computer generation of saw, and wherein saw componet is in the upper/lower positions place;
Fig. 3 illustrates the schematic diagram of the computer generation of saw, and wherein saw componet (part is dissectd) is in the position;
Fig. 4 illustrates the schematic diagram that the computer of a part of the locking mechanism of saw generates;
Fig. 5 illustrates the schematic diagram that the computer of second embodiment of saw generates, and wherein saw componet is in its upper/lower positions place;
Fig. 6 illustrates the schematic diagram that the computer of second embodiment of saw generates, and wherein saw componet is in position on it;
Fig. 7 A and 7B illustrate the pivot brackets that is in two position, angle;
Fig. 8 illustrates the schematic diagram that the computer of the 3rd embodiment of saw generates, and wherein saw componet is in its upper/lower positions place;
Fig. 9 illustrates the schematic diagram that the computer of the 3rd embodiment of saw generates, and wherein saw componet is in position on it;
Figure 10 A illustrates the cam follower of the 3rd embodiment; And
Figure 10 B illustrates the cross section of the cam follower of Figure 10 A along the direction of arrow N.
The specific embodiment
With reference to Fig. 1 to 4 first embodiment of the present invention is described below.
Referring to Fig. 1, this saw comprises the pedestal 2 that round platform 4 wherein is installed.This round platform 4 can rotate around vertical axis.In the front portion of round platform 4 arm 6 is installed, this arm 6 extends through the recess 8 in the front portion that is formed on pedestal 2 and extends to the place ahead of pedestal 2.When described round platform rotated, arm 6 was swung in recess 8, and the maximum of pivoting action is by side 10 restrictions of recess 8.Downside in arm 6 ends is equipped with breech lock 12, this breech lock 12 can be in a known way the angle position of lock arm 6 in recess 8 releasedly.Enclosing spare 14 is installed on pedestal 2 rigidly, and this enclosing spare 14 passes through above round platform 4.
Rear portion at round platform 4 is equipped with bearing diagonal spare 16 pivotally.This bearing diagonal spare 16 can pivot around horizontal oblique axis 18.Can utilize lock handle 20 that bearing diagonal spare 16 is locked in the angle position range with respect to round platform 4.It is irrelevant that lock handle 20 is used for locking mechanism and the present invention of bearing diagonal spare 16, therefore no longer describes in detail.
The end of two straight- bars 30,32 is installed in sliding support 22 rigidly.Described bar 30,32 is prevented from and slides in the sliding support 22 or rotation.Described bar 30,32 is positioned to one on another and parallel to each other.On the end 34 of upper boom 30, spring 36 is installed.The other end of this spring 36 is installed on the bearing diagonal spare 16.The end 34 of spring 36 biased downward upper boom 30 under tension force, and be connected the end away from sliding support 20 of described two bars 30,32 of the bias voltage that makes progress with the pivot of bearing diagonal spare 16 owing to sliding support 22.
On these two bars 30,32, saw componet 38 is installed slidably.
Saw componet 38 comprises electric machine casing 40, in this electric machine casing 40 the motor (not shown) is installed.This motor is by cable 42 power supplies.Handle 44 is installed on the rear portion of electric machine casing 40.Trigger switch 46 is installed, this trigger switch 46 actuating motor when being pressed in handle 44.One driving shaft 48 stretches out from housing 40.Circular saw blade 28 is installed on driving shaft 48 rigidly.When actuating motor, drive shaft turns, thus drive saw blade 28 rotationally.Fixedly guard member 52 is installed on electric machine casing 40 rigidly, and this is the top cutting edge of guard member 52 encirclement saw blades 28 fixedly.Pivot guard member 54 is installed on electric machine casing 40 pivotally, and this pivot guard member 54 can pivot around the pivot center 26 of saw blade 28.Pivot guard member 54 can be surrounded between the encirclement position of following cutting edge of saw blade 28 and the retracted position that its following cutting edge that makes saw blade 28 exposes at it and be pivoted.When this pivot guard member was in retracted position, this pivot guard member telescopically was pivoted to fixedly in the guard member 52.Pivot guard member spring (not shown) with pivot guard member 54 to surrounding the position bias voltage.
Saw componet 38 can along described two bars 30,32 towards or slide away from sliding support 22.
In use, workpiece is placed on pedestal 2 and the round platform 4 against enclosing spare 14.Round platform 4 makes this saw can carry out crosscut on workpiece around the pivoting action of vertical axis.Bearing diagonal spare 16 makes this saw to cut sth. askew on workpiece around oblique axis 18 with respect to the pivoting action of round platform 4.Sliding support 22 on the bearing diagonal spare 16 makes this saw to cut on workpiece around the pivoting action that cuts axis 24.Saw componet 38 makes this saw can carry out sliding cutting on workpiece along the sliding motion of described two bars 30,32.
This saw comprises pivot guard member actuating mechanism.When saw componet when cutting axis 24 position be pivoted to its upper/lower positions from it, this pivot guard member actuating mechanism makes the pivot guard member be pivoted to its retracted position.Spring 36 bias voltage saw componets 38 are so that it is around cutting the position that axis 24 is pivoted to its topmost.In this position, pivot guard member 54 is surrounded the following sword of cutting tip 28.When saw componet when round platform 4 pivots downwards, pivot guard member actuating mechanism makes guard member 54 be withdrawn into fixedly in the guard member 52, thereby the following cutting edge of saw blade 28 is exposed.
With reference to Fig. 1,2 and 3 this pivot guard member actuating mechanism is described in more detail below.
Pivot guard member actuating mechanism comprises Bowden cable 60.This Bowden cable comprises outer tube 62 and interior cable 64.This Bowden cable has two ends, and each end includes two parts, and a part is an end of interior cable 64, and another part is the respective end of outer tube 62.
The first end of Bowden cable 60 passes and is formed on the pivot fitting between bearing diagonal spare 16 and the sliding support 22 and connects.The end 66 of the sleeve pipe 62 of the first end of Bowden cable is connected on the sliding support 22 rigidly by securing supports 68.The end 70 of the cable 64 of the first end of Bowden cable 60 is connected on the bearing diagonal spare 16.
The second end of Bowden cable passes and is formed on fixedly the pivot fitting between the guard member 52 and pivot guard member 54 and connects.The end 72 of the sleeve pipe 62 of the second end of Bowden cable 60 is connected to fixedly on the guard member 52 rigidly.The end 74 of the cable 64 of the second end of Bowden cable 60 is connected on the pivot guard member 54.Cable 64 is wrapped on the tube-like piece 76 between the stiff end 72 of its second end 74 and sleeve pipe 62, and this tube-like piece 76 surrounds driving shaft 48.
The operation of this pivot guard member actuating mechanism is as follows.
By the spring 36 on the end 34 (not shown among Fig. 3) that acts on upper boom 30 saw componet is biased into position on it (as shown in Figure 3).This pivot guard member spring is biased into the encirclement position that this pivot guard member is surrounded the following cutting edge of saw blade 28 with pivot guard member 54.When the pivot guard member was positioned at this position, the end 74 of the cable 64 of the second end of Bowden cable was pulled to from end 72 distance farthest of the sleeve pipe 62 of the second end of this Bowden cable by pivot guard member spring.On the contrary, the end 70 of the cable 64 of the first end of Bowden cable 60 is drawn in the sleeve pipe 62, thereby makes the distance of end 66 of sleeve pipe 62 of first end of this end and this Bowden cable 60 the shortest.
Yet when saw componet was pivoted to its as shown in Figure 2 extreme lower position, the distance between the end 66 of the sleeve pipe 62 of the end 70 of the cable 64 of the first end of Bowden cable 60 and the first end of this Bowden cable 60 was forced to increase.This be because, the position that is installed in the end 70 on the bearing diagonal spare 16 of cable is maintained fixed motionless, and sleeve pipe 62 be installed on the sliding support 22 end 66 because of between bearing diagonal spare 16 and the sliding support 22 being pivoted relative to each other the motion move.The increase of this length makes cable 64 reduce in the length that is installed between the end 74 on the pivot guard member 54 that is connected to end 72 on the fixing guard member 52 and cable 64 of sleeve pipe 62.When cable 64 was withdrawn in the sleeve pipe 62 at the second end place of Bowden cable 60, this cable was advanced and is made pivot guard member 54 be pivoted to its retracted position around tube-like piece 76.
When saw componet is pivoted to its extreme higher position; distance between the end 66 of the sleeve pipe 62 of the end 70 of the cable 64 of the first end of Bowden cable 60 and the first end of this Bowden cable 60 reduces, thereby makes pivot guard member 54 be pivoted to its encirclement position because of the biasing force of pivot guard member spring.
The locking mechanism of describing with reference to Fig. 4 below this saw also comprises.When not using this saw, hope can be with saw componet 38 with respect to the locking position of bearing diagonal spare 16 to storage location.When not using saw, saw componet 38 moves to its uppermost position in fig-ure (Fig. 3) because of the biasing force of spring 36.So saw componet 38 slides to and against sliding support 22 along the bar 30,32 that tilts because of spring 36 under gravity.Hope locks onto saw componet this storage location and prevents the accidental movement of saw componet 38 with respect to bearing diagonal spare 16.
Locking mechanism comprises the expansion link 80 that is slidably mounted in the handle 44.This expansion link 80 can slide on the direction by the arrow A indication shown in Fig. 4 along axis 82.Be formed with thumb pad (finger pad) 84 on an end of expansion link 80, this thumb pad passes handle 44 and stretches out, and can engage this expansion link 80 to discharge locking mechanism by this thumb pad user.
On the other end of expansion link 80, center on point 86 and be pivotally connected to securing rod 88.This securing rod 88 extends through fixedly guard member 52 towards bearing diagonal spare 16.On the end of the most close bearing diagonal spare 16 of securing rod 88, be formed with hook 90.Fastener (catch) 92 (seeing Fig. 2 and 3) is installed on bearing diagonal spare 16.When saw componet 38 was in its as shown in Figure 3 storage location, hook 90 engaged so that saw componet 38 is locked in this position with fastener 92.When saw componet was locked in this position, this saw componet can not pivot downwards or slide along bar 30,32 around axis 24.Hook 90 keeps engaging with fastener 92 by a spring 94, and this spring 94 is connected between securing rod 88 and the electric machine casing 40 and downward bias pressure hook 90.
Near hook 90, on securing rod 88, be formed with cam surface 96.Be formed with bolt 98 on electric machine casing 40, this bolt 98 engages with cam surface 96.Spring 94 bias voltages make bolt 98 and cam surface 96 engage.When hook 90 engaged with fastener 92, bolt 98 was positioned at along the uppermost position in fig-ure of cam surface 96, as shown in Figure 4.
For hook is discharged from fastener 92, operator presses thumb pad 84 makes it away from 16 motions of bearing diagonal spare, thereby expansion link 80 is slided along axis 82.This spurs securing rod 88 again away from bearing diagonal spare 16.This makes bolt 98 slide along cam surface 96, thereby makes securing rod 88 overcome the biasing force of spring 94 and move upward.This makes hook 90 move above fastener 92, thereby the permission operator utilizes handle 44 or moves this saw componet 38 by saw componet 38 is slided around axis 24 pivots or along bar 30,32.When the operator stopped to push thumb pad 84, the biasing force of spring 94 moved downward hook.
For hook 90 is engaged again with fastener 92, the operator is placed on storage location with saw componet.When saw componet moved to storage location, hook 90 was crossed fastener 92 because of its shape, so engage with this fastener.
Below with reference to Fig. 5, the 6 and 7 explanation second embodiment of the present invention.Occur in a second embodiment with first embodiment in the identical feature that occurs use identical Reference numeral.
Except the end 10 of the cable 64 that makes Bowden cable 60 was connected to mechanism on the bearing diagonal spare 16, the second embodiment of the present invention was identical with first embodiment.In first embodiment, end 70 is directly connected on the bearing diagonal spare 16.In a second embodiment, this end 70 is connected on the bearing diagonal spare 16 by pivoting bracket 200.
This pivoting bracket has been shown in Fig. 7 A and 7B.
As being clearly shown that in Fig. 7 A and 7B, pivoting bracket 200 comprises two arms 202,204 that extend from centered pivot point 206.Pivoting bracket 200 is made by metallic plate and thickness basically identical on its whole length.
In underarm 202, be formed with straight slotted hole 208.In upper arm 204, be formed with crooked slotted hole 210.
Pivoting bracket 200 heart pivotal point 206 places therein is installed on the bearing diagonal spare 16 pivotally and can centers on a pivot axis, and this pivot axis passes pivotal point 206 perpendicular to the page at Fig. 7 A and 7B place.
The end 70 of the cable 64 of Bowden cable 60 is connected on the underarm 202 by engaging with slotted hole 208.The end 70 of this cable is positioned at and remains on decentre pivotal point 206 place, end farthest of slotted hole 208, as illustrated in Figures 5 and 6.End 70 remains on this position by the tension force on the cable 64.Though end 70 remains on the place, end of slotted hole 208, this end 70 can be with respect to the end pivot of underarm 202, as illustrated in Figures 5 and 6.The change in orientation of the cable 64 of this and pivoting bracket 200 and Bowden cable adapts.
When bolt 212 slided in slotted hole 210, pivoting bracket 200 pivoted along with the position of bolt 212 centers on centered pivot point 206 because of slotted hole 210, so that bolt 212 can be slided in slotted hole 210.The pivoting action of pivoting bracket 200 depends on the profile of slotted hole 210.In fact, the profile of slotted hole 210 or edge are as cam surface, and bolt 212 is used as cam follower, and this driven member is advanced along cam surface when sliding slotted hole 210.
In this specific design, as being clearly shown that in Fig. 7 A and 7B, the profile of slotted hole 210 is a curve.
The pivoting action of pivoting bracket 200 causes the pivoting action of underarm 202, and the pivoting action of underarm causes the pivoting action of end 70 of the cable 64 of Bowden cable again.
The profile of slotted hole 210 is designed to like this, promptly, when saw componet from it position (Fig. 6) when its upper/lower positions (Fig. 5) pivots, thereby the end 70 of the end of underarm 202 and cable 64 pivots at first downwards (first of motion), (second portion of motion) then slightly upwards pivots.Therefore, the distance between the end 66 of the sleeve pipe 62 of the first end of the end 70 of the cable 64 of the first end of Bowden cable 60 and this Bowden cable changes because of the end 70 of the end 66 of the sleeve pipe 62 that moves upward and the cable 64 that moves downward.The pivot position of sliding support 22 is directly depended in the motion of the end 66 of the sleeve pipe 62 of the first end of this Bowden cable.The profile of slotted hole 210 is depended in the motion of the end 70 of cable 64.
The motion of the end 70 of cable 64 since Fig. 7 A and the disclosed crooked slotted hole 210 of 7B and at first downward slightly upwards return then.When sliding support 22 pivots on bearing diagonal spare 16 with uniform rate so that saw componet moves to its upper/lower positions the position from it, and when end 70 (during the first of motion) when advancing downwards, the speed that the end 70 of cable 64 is left in 66 motions of the end of sleeve pipe 62 increases.This makes the pivot guard member be pivoted to its retracted position with the speed that increases.When sliding support 22 is pivoting on the bearing diagonal spare 16 so that saw componet when the position is to its upper/lower positions motion from it with uniform rate, and when end 70 (during the second portion of motion) when upwards advancing, the speed that the end 70 of cable 64 is left in 66 motions of the end of sleeve pipe 62 reduces.This makes the pivot guard member be pivoted to its retracted position with the speed that reduces.
This feasible pivot guard member is at first with the withdrawal of speed faster, thereby exposes cutting edge when saw componet 38 is in the higher position soon, then along with saw componet near round platform 4 the latter half at pivoting action withdraw with slower speed.
When saw componet from its extreme lower position (Fig. 5) when its extreme higher position (Fig. 6) pivots; bolt 212 is advanced along slotted hole 210 in the opposite direction; thereby cause the reverse motions of pivot guard member 54, the changing to the pivoting action of its speed of surrounding position motion of pivot guard member 54 by pivoting bracket 200 from its retracted position.
Below with reference to Fig. 8,9 and 10 explanations the 3rd embodiment.In the 3rd embodiment, occur with second embodiment in the identical feature that occurs use identical Reference numeral.The pivoting bracket 200 in having changed second embodiment and the design of bolt 212, the 3rd embodiment is identical with second embodiment.
Shown in Figure 10 A and 10B, pivoting bracket 200 has replaced with pivot rods 300.This pivot rods 300 is installed on the bearing diagonal spare 16 pivotally.
Figure 10 A and 10B show this pivot rods 300.
As being clearly shown that in Figure 10 A, pivot rods 300 comprises the arm 302 that extends from pivotal point 306.Pivot rods 300 is made by metallic plate and thickness basically identical on its whole length.
The place, end away from pivotal point 306 at arm 302 is formed with straight slotted hole 308.On the sidepiece of this arm 302, be formed with bend relief 310.
Pivot rods 300 is installed on the bearing diagonal spare 16 pivotally and can pivots around a pivot axis 304 (seeing Figure 10 B) at its pivotal point 306 places, this pivot axis 304 passes pivotal point 306 along the direction vertical with Figure 10 A place page.
The end 70 of the cable 64 of Bowden cable 60 is connected on the arm 302 by engaging with slotted hole 308.Shown in Figure 10 A, the end 70 of this cable is positioned at and remains on the upper end of slotted hole 308, and this end is from pivotal point 306 end farthest, shown in Fig. 8 and 9.End 70 remains on this position by the tension force of cable 64.Though end 70 is maintained at the place, end of slotted hole 308, this end 70 can be with respect to the end pivot of arm 302, shown in Fig. 8 and 9.This can adapt to the variation of directed end portion of the cable 64 of pivot rods 300 and Bowden cable.
On sliding support 22, be rotatably mounted with roller 312.This roller 312 utilizes ball bearing to install so that the sliding friction minimum, and can center on its axis and freely rotate.Roller 312 is resisted against on the outward flange of bend relief 310 of arm 302 of pivot rods 300 and locatees.Can the go for a stroll edge of bent projection 310 of this roller 312 rolls.The end of the tension force of cable 64 pulling pivot rods 300, and the bias voltage that shown in Fig. 8 and 9, the end of this bar made progress (being bar 300 around pivotal point 306) by bias voltage along clockwise direction pivotally, thus make bend relief 310 against roller 312 and keep in touch this roller 312.When sliding support 22 along with saw componet when position (Fig. 9) pivots to its upper/lower positions (Fig. 8) motion from it, roller 312 is forced to roll to the left side of this projection 310 (Fig. 8) from this protruding right side (Fig. 9) on bend relief 310.
When roller 312 rolled around projection 310, the position that pivot rods 300 is followed roller 312 because of bend relief 310 centered on centered pivot point 306 pivots, so that roller 312 can be rolled across on projection 310.The pivoting action of pivot rods 300 depends on the profile of projection 310.In fact, the profile of projection 310 or edge are as cam surface, and roller 312 is used as cam follower, and this driven member is advanced along cam surface when rolling around projection 310.
In this specific design, as being clearly shown that in Figure 10 A, the profile of projection 310 is a curve.
The pivoting action of pivot rods 300 causes the pivoting action of arm 302, and the pivoting action of this arm causes the pivoting action of end 70 of the cable 64 of Bowden cable again.
The profile of projection 310 is designed to like this, promptly, when saw componet from it position (Fig. 9) when its upper/lower positions (Fig. 8) pivots, thereby the end 70 of the end of arm 302 and cable 64 pivots at first downwards (first of motion), slightly upwards pivot (second portion of motion) then, shown in Fig. 8 and 9.Therefore, the distance between the end 66 of the sleeve pipe 62 of the first end of the end 70 of the cable 64 of the first end of Bowden cable 60 and this Bowden cable changes because of the end 70 of the end 66 of the sleeve pipe 62 that moves upward and the cable 64 that moves downward.The pivot position of sliding support 22 is directly depended in the motion of the end 66 of the sleeve pipe 62 of the first end of Bowden cable.The profile of projection 310 is depended in the motion of the end 70 of cable 64.
The motion of the end 70 of cable 64 is at first downward owing to disclosed bend relief 310 in Figure 10 A, slightly upwards returns then.When sliding support 22 is pivoting on the bearing diagonal spare 16 so that saw componet when the position is to its upper/lower positions motion from it with uniform rate, and when end 70 (during the first of motion) when advancing downwards, the speed that the end 70 of cable 64 is left in 66 motions of the end of sleeve pipe 62 increases.This makes the pivot guard member be pivoted to its retracted position with the speed that increases.When sliding support 22 is pivoting on the bearing diagonal spare 16 so that saw componet when the position is to its upper/lower positions motion from it with uniform rate, and when end 70 (during the second portion of motion) when upwards advancing, the speed that the end 70 of cable 64 is left in 66 motions of the end of sleeve pipe 62 reduces.This makes the pivot guard member be pivoted to its retracted position with the speed that reduces.
This feasible pivot guard member is at first with the withdrawal of speed faster, thereby exposes cutting edge when saw componet 38 is in the higher position quickly, then along with saw componet near round platform 4 the latter half at pivoting action withdraw with slower speed.
When saw componet from its extreme lower position (Fig. 8) when its extreme higher position (Fig. 9) pivots; roller 312 is advanced in opposite direction (in Fig. 8 and 9 from left to right) upper edge projection 310; thereby cause the reverse motions of pivot guard member 54, this pivot guard member changes to the pivoting action of its speed of surrounding position motion by pivot rods 300 from its retracted position.
The of the present invention second and the 3rd embodiment has described and how to be installed on the bearing diagonal spare 16 by the end 70 of cam mechanism with the cable 64 of Bowden cable 60, and this cam mechanism is operated when round platform 4 pivots so that move with respect to bearing diagonal spare 16 in the end 70 of cable 64 in saw unit 38.The end 66 of the sleeve pipe 62 of Bowden cable 60 is directly connected on the sliding support 22, and only moves with respect to this bearing diagonal spare 16 because of the pivoting action of sliding support 22 on bearing diagonal spare 16.Certainly, it will be appreciated by those skilled in the art that, also can be connected on the sliding support 22, thereby when sawing unit 38 when round platform pivots, move with respect to this sliding support 22 by the operation of cam in this end by the end 66 of cam mechanism with the sleeve pipe 62 of Bowden cable 60.This motion will be attached in the motion that is caused at the pivoting action on the bearing diagonal spare 16 by sliding support 22.The use of the end 66 of cam and sleeve pipe 62 also can append to or the use of the end 70 of the cable 64 of alternative cam and Bowden cable.The structure of this cam that uses with sleeve pipe 62 can be same or similar with the cam that uses in end 70 described in the second and the 3rd embodiment and cable 64.
Claims (19)
1, a kind of saw, this saw comprises:
Be connected to the base assembly (2,4) on the installation portion (16);
Be connected to the saw unit (38 on the support portion (22), 22), this support portion (22) be installed in pivotally that described installation portion (16) is gone up so that this saw unit (38) towards or away from described base assembly (2,4) pivot, this saw unit (38) has output driving shaft (48), circular saw blade (28) can be installed rigidly to drive this circular saw blade (28) rotationally by a motor on this driving shaft (48), wherein, the pivot center (26) of described driving shaft (48) is basically parallel to the pivot axis (24) between described support portion (22) and the described installation portion (16);
At least one is installed in the pivot guard member (54) on the described saw unit (38) pivotally, this pivot guard member (54) can be when being installed in described axle (48) when saw blade (28) and going up its primary importance of at least a portion of surrounding the following sword of this saw blade (28) be pivoted to second retracted position that the described described part of sword down that makes described saw blade (28) exposes;
Wherein said saw unit (38) can be with respect to described support portion (22) motion with the described pivot center (26) that changes described pivot guard member and the distance between the pivot axis (24) between described support portion (22) and the described installation portion (16);
It is characterized in that; also be provided with pivot guard member actuating mechanism; this pivot guard member actuating mechanism can make described at least one pivot guard member (54) move to its second retracted position from its primary importance when described base assembly (2,4) pivots in described saw unit (38).
2, saw as claimed in claim 1 is characterized in that, described support portion (22) are connected on the described saw unit (38) by at least one guide rail (30,32).
3, saw as claimed in claim 2 is characterized in that, perhaps described support portion (22) or described saw unit (38) are fixed on described at least one guide rail (30,32), and another slides to change distance along described at least one guide rail (30,32).
As claim 1,2 or 3 described saws, it is characterized in that 4, described installation portion (16) can pivot with respect to described base assembly (2,4).
As claim 1,2,3 or 4 described saws, it is characterized in that 5, described base assembly comprises the platform (4) that is installed in rotation in the pedestal (2), described installation portion (16) is installed on these (4).
6, each described saw in the claim as described above; it is characterized in that; described pivot guard member actuating mechanism comprises at least one Bowden cable (60); this Bowden cable (60) comprises the interior cable (64) that can slide and has two ends in outer tube (62); each end includes two parts; first is an end of cable (64) in being somebody's turn to do, and second portion is the respective end of this outer tube (62).
Wherein, a part of the described first end of described Bowden cable is connected to described base assembly (2,4) on, another part of the described first end of this Bowden cable is connected on the described saw unit (38), thereby should saw unit (38) make relative motion in the described sleeve pipe (62) of described cable (64) at this Bowden cable (60) of described Bowden cable (60) towards the pivoting action of described base assembly (2,4); And
A part of the described the second end of described Bowden cable is connected on described at least one pivot guard member (54); another part of the described the second end of this Bowden cable (60) be connected to described saw unit (38) go up and be arranged to described Bowden cable (60) described cable (64) since described saw unit (38) towards the pivoting action of described base assembly (2,4) and the relative motion in the described sleeve pipe (62) at this Bowden cable (60) makes described at least one pivot guard member (54) move to its second retracted position from its primary importance.
7, saw as claimed in claim 6 is characterized in that, a part of the described first end of described Bowden cable is connected on the described base assembly (2,4) by described installation portion (16).
As claim 6 or 7 described saws, it is characterized in that 8, another part of the described first end of described Bowden cable is connected on the described saw unit (38) by described support portion (22).
9, each described saw in the claim as described above, it is characterized in that, a part of the described first end of described Bowden cable is with respect to described base assembly (2,4) be maintained fixed, and another part of the described first end of described Bowden cable in described saw unit (38) to described base assembly (2, motion when 4) pivoting is so that make the described cable (64) of described Bowden cable (60) produce relative motion in the described sleeve pipe (64) of this Bowden cable (60).
10, as each described saw in the claim 1 to 8, it is characterized in that, two parts of the described first end of described Bowden cable all in described saw unit (38) towards described base assembly (2,4) when pivoting action is with respect to this base assembly (2,4) motion is so that make the described cable (64) of described Bowden cable (60) produce relative motion in the described sleeve pipe (62) of this Bowden cable.
11, as claim 9 or 10 described saws, it is characterized in that, one or two part of described first end is moved with respect to described base assembly (2,4), this cam mechanism is operation when described base assembly (2,4) moves pivotally in described saw unit (38).
12, each described saw in the claim as described above is characterized in that a part of the described first end of described Bowden cable is connected on the described base assembly (2,4) by cam mechanism.
13, saw as claimed in claim 12 is characterized in that, a part of the described first end of described Bowden cable is connected on the described base assembly (2,4) by the described installation portion that connects described cam mechanism.
14, each described saw in the claim as described above is characterized in that another part of the described first end of described Bowden cable is connected on the described saw unit (38) by cam mechanism.
15, saw as claimed in claim 14 is characterized in that, another part of the described first end of described Bowden cable is connected on the described saw unit (38) by the described support portion (22) that is connected on the described cam mechanism.
16, each described saw in the claim as described above, it is characterized in that, this saw is provided with cam mechanism, this cam mechanism comprises two parts, first part comprises cam, second part comprises cam follower, a part is connected to described base assembly (2,4) on, one other component is connected on the described saw unit (38), and be arranged to this cam follower in described saw unit (38) towards described base assembly (2, advance along described cam when 4) moving pivotally, wherein, a part of the described first end of described Bowden cable is connected on the part of this cam mechanism, and moves along described cam rows and then by this part in response to described cam follower.
As each described saw in the claim 11 to 16, it is characterized in that 17, described cam is formed on the pivot rods that is installed on pivotally on the described base assembly, described cam follower is connected on the described saw unit.
18, saw as claimed in claim 17 is characterized in that, described cam is the groove in the described bar.
19, saw as claimed in claim 17 is characterized in that, described cam is formed on the edge of described bar, and this edge has predetermined profile.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0520416.9 | 2005-10-07 | ||
| GB0520416A GB0520416D0 (en) | 2005-10-07 | 2005-10-07 | Saw |
| GB0602658.7 | 2006-02-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1943942A true CN1943942A (en) | 2007-04-11 |
Family
ID=35429984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610141692 Pending CN1943942A (en) | 2005-10-07 | 2006-10-08 | Saw |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1943942A (en) |
| GB (1) | GB0520416D0 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109128362A (en) * | 2018-11-15 | 2019-01-04 | 广东铭利达科技有限公司 | A kind of cutting machine sawtooth mounting device |
-
2005
- 2005-10-07 GB GB0520416A patent/GB0520416D0/en not_active Ceased
-
2006
- 2006-10-08 CN CN 200610141692 patent/CN1943942A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109128362A (en) * | 2018-11-15 | 2019-01-04 | 广东铭利达科技有限公司 | A kind of cutting machine sawtooth mounting device |
| CN109128362B (en) * | 2018-11-15 | 2020-08-04 | 广东铭利达科技有限公司 | Saw tooth mounting device of cutting machine |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0520416D0 (en) | 2005-11-16 |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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