CN201346645Y

CN201346645Y - Circular saw

Info

Publication number: CN201346645Y
Application number: CNU2008201791861U
Authority: CN
Inventors: 罗伯特·S·格雷特
Original assignee: Black and Decker Inc
Current assignee: Black and Decker Inc
Priority date: 2007-09-13
Filing date: 2008-09-12
Publication date: 2009-11-18
Anticipated expiration: 2018-09-12

Abstract

The utility model relates to a circular saw, which comprises a rack component and a driving motor component. The driving motor component is connected with the rack component; an output component is driven by the driving motor component; a bottom plate is arranged on the rack component in an adjustable way; the blade diameter of the circular saw is around 7.3 inches; and the bottom plate can be adjusted to provide a cutting depth more than or equal to 3.0 inches.

Description

Annular saw

Technical field

This is novel to relate generally to a kind of annular saw, particularly relates to a kind of annular saw with darker relatively cutting power.

Background technology

The annular saw that constitutes 7.25 inches saw blades generally has about 2.38 inches depth of cut.Their depth of cut is subjected to the restriction of many factors, for example is subject to be used for saw blade is fixed to the washer size of the output axle of annular saw and/or the size of the gear reduction unit of annular saw and/or position.

The utility model content

Cut the limited problem of the degree of depth in order to solve the traditional round sawing, this practicality has proposed a kind of annular saw, comprises housing assembly and the CD-ROM drive motor assembly that is connected on the housing assembly.Output block is driven by the CD-ROM drive motor assembly.Base plate is adjustable to be installed on the housing assembly.Circular saw blade has diameter and is about 7.3 inches.Base plate can be adjusted to provide the depth of cut more than or equal to 3.0 inches.

According to additional technical characterictic, described output block limits the output gear that rotatably supports with respect to housing assembly.Output gear has in abutting connection with first end of circular saw blade and second end of relative circular saw bit.Clutch shaft bearing rotatably supports first end of output gear, and second bearing rotatably supports second end of output gear.In a kind of configuration, clutch shaft bearing is a needle bearing.The output block concentrated area limits output gear and integrally formed output axle.Circular saw blade is fixed on the output axle for rotation.Output gear limits external diameter, and clutch shaft bearing limits internal diameter simultaneously.The external diameter of output gear is less than the internal diameter of clutch shaft bearing.Output block is supported in the gear-box of housing assembly.The far-end of gear-box limits front end.Front end is applicable to and is contained at least in part in the aperture that forms by base plate.

According to other feature, the CD-ROM drive motor assembly limits idler axle, and this idler axle is driven by the CD-ROM drive motor rotation and supported by the gear-box of housing assembly.The CD-ROM drive motor assembly comprises and is delivered to the belt of output block with rotatablely moving from middle axle.Belt is substantially equal to the diameter of belt across wherein output across the diameter of wherein idler axle.Clutch shaft bearing rotatable be supported on first end on of output by supporting, and rotatable being supported on second end of second bearing by supporting by gear-box by gear-box.Belt engages output block at the zone line of first and second ends of output block.

In other feature, the CD-ROM drive motor assembly comprises motor, from the motor output shaft and the jackshaft of motor extension.Motor output shaft has first worm gear.Jackshaft has second worm gear and countershaft-gear.Output block has output gear.First worm gear and second worm gear mesh for rotation.Countershaft-gear and output gear mesh for rotation.Jackshaft limits axis, and it extends substantially transversely to the axis that is limited by motor output shaft.According to an embodiment, jackshaft is configured to every rotation 1 its rotation of circle of saw blade output shaft and is less than 1 circle.According to an embodiment, motor output shaft is configured to every rotation 1 circle of output, and it rotates about 5 circles.According to an embodiment, first gearratio of first and second worm gears is greater than second gearratio of countershaft-gear and output gear.In a kind of structure, first worm gear has 1 screw thread beginning, and second worm gear has about 19 worm-gear toothings.In a kind of structure, countershaft-gear has about 44 teeth, and output gear has about 11 teeth.

Still according to further feature, the CD-ROM drive motor assembly comprises the motor that drives the output roller.The output roller rotatably engages the first flat side of circular saw blade, so as around the rotating shaft transferring rotational motion of circular saw bit to circular saw bit.The output roller directly and the first flat engage sides of circular saw blade.The reaction roller disposes rotatably against the second flat side of the circular saw blade of relative first plane surface.In output roller and the reaction roller at least one is biased to circular saw blade and engages.

The utlity model has the effect of the darker degree of depth of the disk saw blade cutting that can utilize conventional size, this allows user to use the annular saw and the thicker wood or the other materials sheet of saw blade cutting of conventional size.

Description of drawings

Accompanying drawing described here only is in order to illustrate, and can not limit this novel scope by any way.

Fig. 1 is the side view according to the annular saw of this novel teachings structure;

Fig. 2 and Fig. 3 are the perspective view of the part of annular saw among Fig. 1;

Fig. 4 is the perspective view of the part of annular saw among Fig. 1, has illustrated driven gear and output shaft in more detail;

Fig. 5 is the part perspective view of annular saw among Fig. 1, has illustrated the gear-box part in more detail;

Fig. 6 is the partial enlarged drawing that has shifted out the Fig. 5 behind the seal;

Fig. 7 is the decomposition diagram of the gear-box part among Fig. 5;

Fig. 8 is the perspective view according to the part of the annular saw with saw blade guard assembly of this novel instruction structure;

Fig. 9 is the decomposition diagram of the part of the blade guard among Fig. 8;

Figure 10 is the perspective view of annular saw alternative structure;

Figure 11 is according to the perspective view of supplementary features around the following protecting component that rotatably disposes of output axle;

Figure 12 is the following blade guard among Figure 11 and the decomposition diagram of output shaft, and has shown that it is operationally related with pair of bearings and clamping washer;

Figure 13 be among Figure 11 13-13 to sectional view;

Figure 14 is the side view with annular saw of another saw blade guard assembly of constructing according to this novel instruction;

Figure 15 and 16 is the side view of similar Figure 14, but has illustrated the following protecting component of middle and fully open position respectively;

Figure 17 and 18 is the perspective view with annular saw of another saw blade guard assembly of constructing according to this novel instruction;

Figure 19 is the perspective view of the part of annular saw in Figure 17 and 18;

Figure 20 is the perspective view of the saw blade guard assembly among Figure 17 to 19;

Figure 21 and 22 is the perspective view of similar Figure 20, but has illustrated the following protecting component of middle and fully open position respectively;

Figure 23 is another perspective view according to another annular saw of this novel teachings structure;

Figure 24 is the enlarged perspective of the part of annular saw among Figure 23, has illustrated gear-box in more detail;

Figure 25 is the perspective view of the part of annular saw among Figure 23, has illustrated belt and output axle in more detail;

Figure 26 to Figure 28 is the perspective view according to another annular saw of this novel teachings structure;

Figure 29 is the side view according to the CD-ROM drive motor assembly of an embodiment structure in this novel teachings;

Figure 30 is the front perspective view according to the CD-ROM drive motor assembly of this novel another embodiment; And

Figure 31 is the back perspective view of the CD-ROM drive motor assembly of Figure 30.

The specific embodiment

With reference to figure 1 and Fig. 2, represent with Reference numeral 10 usually according to the part of the annular saw of this novel teachings structure.Annular saw 10 can comprise housing assembly 12, CD-ROM drive motor assembly 14, and base plate 16.CD-ROM drive motor assembly 14 can comprise motor 18, transmission device 20, and output axle 22.

Housing assembly 12 can comprise first and

second case members

30 and 32 and gear-box 36 respectively.First and

second case members

30 and 32 can be cooperated to limit internal cavities 38, first order handle 40, trigger hole 42, and second level handle 44.In this specific embodiment, annular saw 10 is instruments of " hawser is arranged ", and it is fit to be connected to power supply via the cable (not shown).Be appreciated that annular saw 10 can additionally or selectively provide power by dc source, and in such cases, first and

second case members

30 and 32 can cooperate equally with on the rechargeable battery (not shown) that removably connects and/or among limiting battery coupling part (not shown).Member motor 18 and other, well-known general annular saw, for example trigger assembly (not specifically illustrating) can be contained in the cavity 38.Gear-box 36 removably is connected on first and second case members 30 and 32.Adopt pin 50 that motor 18 and/or first and

second case members

30 and 32 are accurately navigated to gear-box 36.Gear-box 36 can be made by suitable material, for example reinforced plastic or light relatively metal, and for example aluminium or magnesium, and can be used as the platform that can connect motor 18 and transmission device 20.

Motor 18 can provide rotary power to transmission device 20, and transmission device 20 can be delivered to rotary power on the output axle 22.With reference to Fig. 3 and Fig. 4, transmission device 20 comprises a plurality of gears, and it comprises driven gear 56 and output gear 58.Driven gear 56 can be installed on the axle 60, and axle 60 is supported on the bearing 62, and bearing 62 is contained in the gear-box 36 with the integral form (if desired it being processed) of bearing block (not specifically illustrating).Output gear 58 can be connected on the output axle 22 and with respect to gear-box 36 and be supported on equally on the bearing that matches, for example ball bearing 66 and needle bearing 68, they can be contained in the front end 70 (for example summit) of gear-box 36 with the integral form (and if desired it being processed) of bearing block (for example Reference numeral among Fig. 5 210) equally.One of ordinary skill in the art will appreciate that, the first gear (not shown) can be connected to the output shaft (not shown) of motor 18 (Fig. 1) and can be meshed with another gear (not shown) in the transmission device 20, and rotary power can be by the one or more gear transmission in the transmission device 20 to driven gear 56.In this specific embodiment, output axle 22 and output gear 58 are one-body molded and comprise that the internal thread hole 76 that is configured to admit threaded fastener 78 (Fig. 3), threaded fastener 78 can be used for circular saw blade 80 (Fig. 2) is clamped on the output axle 22.

Because output gear 58 diameters less relatively (for example with respect to driven gear 56), and it is connected on the output axle 22, so it will and have bigger moment of torsion than the slow of driven gear 56 rotations.In one embodiment, the external diameter of output gear 58 is defined as D1.It is the outer race 74 (Fig. 5) of D3 (in order to mesh with housing assembly 12) that needle bearing 68 can limit inside race 72 and the external diameter that internal diameter is D2 (meshing in order to the external diameter with output axle 22).In one embodiment, D1 can be less than D2.

Base plate 16 is generally habitually practised in its structure, operation and similarly, needn't describe details in detail at this.In brief, what base plate 16 can pivot is connected on the housing assembly 12, be used for around the axis rotation, this axis is parallel to the rotation of circular saw blade 80 (Fig. 2) usually, that is, in order to regulate depth of cut, base plate 16 also can be around another axis rotation perpendicular to the rotating shaft of circular saw blade 80, that is, in order to regulate the inclination angle of cutting.In an illustrated embodiment, base plate 16 can pivot around pivotal axis 82 (Fig. 1).Base plate 16 can also pivot around axis 84 (Fig. 2) and cut to provide to cut sth. askew.Base plate 16 can comprise plate member 100, and this plate member 100 can comprise saw blade aperture 102, and circular saw blade 80 (Fig. 2) is disposed in this aperture.Plate member 100 sides of the most close housing assembly 12 comprise the front end aperture 104 of the front end 70 that gear-box 36 wherein is set.Front end aperture 104 allows the outside with the front end 70 of gear-box 36 to be positioned a little near a plane, i.e. the working face 106 (Fig. 2) of base plate 16, thus increase the depth of cut of annular saw 10.In one embodiment, the part of the outside of front end 70 can partly be contained in the front end aperture 104 at least.Such structure can make the front end 70 easy positions that obtain near working face 106.

With reference to Fig. 2 and Fig. 5 to 7, gear-box 36 comprises that first housing parts 200 (Fig. 2) and second housing parts, 202, the second housing parts 202 are detachably connected on first housing parts 200 to close the openend of first housing parts 200.Second housing parts 202 also comprises a dimple 210 and can hold the bearing aperture 212 of the outer race 74 of needle bearing 68 (Fig. 4), and this dimple 210 is configured to the structure holding bearing 68 (Fig. 4) and support driven gear 56 (Fig. 4) spool 60 (Fig. 4).Seal groove 216 is formed on the sealing surfaces 218 of second housing parts 202.Normally, seal groove 216 can comprise first and

second sidewalls

220 and 222, can hold suitable seal 224 between these two sidewalls.Yet in order easier to increase depth of cut, the part 226 that extends in around the bearing aperture 212 of seal groove 216 is set to not have inwall (that is second sidewall 222).When needle bearing 68 (Fig. 4) is assembled on second housing parts 202, the outer race 74 of needle bearing 68 is positioned to form wall 230 (promptly, the wall similar), to second sidewall 222 this wall 230 can with the first side wall 220 cooperations of seal groove 216 with fixed seal 224.Therefore, seal 224 can directly engage outer race 74.In a kind of like this layout, the material thickness of second housing parts 202 between seal 224 and outer race 74 can be eliminated.By eliminating the material (material of second housing parts 202) of the exterior lateral area of output shaft 22 near the zone 232 (Fig. 6) of processing work, output shaft 22 and circular saw blade 80 move near processing work effectively, to increase depth of cut.

Be appreciated that above-mentioned annular saw 10 can adopt the saw blade protection assembly that can hide circular saw blade.First saw blade protection assembly according to this novel instruction structure shows in Fig. 8 and Fig. 9, represents with Reference numeral 300 usually.Saw blade protection assembly 300 can comprise saw blade guard block 301 and following saw blade guard block 302 and needle bearing 304.Following guard block 302 can have the bearing insert 310 of the relative low profile that has bearing aperture 312, and needle bearing 304 can be press-fitted or alternate manner is attached in the bearing aperture 312.Needle bearing 304 (with following guard block 302) can be contained in output axle 22 tops.When base plate 16 is set to reach maximum depth of cut and guard block 302 rotates to full open position down; being rotated can be from the outer peripheral face of needle bearing 304 (promptly near the edge 320 of the bearing insert 310 of plate member 100; outer peripheral face from the outer races of needle bearing 304) extends a relatively little quantity, for example between 0.2 inch to 0.4 inch.In addition, edge 320 does not need fully with one heart with bearing aperture 312 on big relatively circle segments, and still they are preferably contour from the position of full open position, to keep enough intensity and robustnesses.

Similar saw blade protection assembly 300a has been shown among Figure 10.In this embodiment, the needle bearing 68a that is used for supporting output shaft 22 length more relative than the needle bearing shown in Fig. 4 68.Following saw blade guard block 302 (Fig. 9) is pivotally mounted in the first of outer races of needle bearing 68a, and the remainder of outer races can be press fitted on the gear-box 36a.

With reference now to Figure 11,, there is shown another saw blade guard block 302a down, it operationally is associated with output axle 322.Following saw blade guard block 302a is defined for the guard block main body lining 325 of admitting output shaft 322 parts.With reference to Figure 12 and 13, lining 325 limits outer annular recess 326 and interior annular recess 328 in addition.Outer annular recess 326 is configured to hold outer bearing 330 safely, and interior annular recess 328 is configured to hold inner bearing 332 safely.Outer bearing 330 and inner bearing 332 can limit any suitable bearing or bearing assembly, ball bearing for example, but be not limited thereto.

Interior clamping washer 340 can be arranged in the middle of outer bearing 330 and the saw blade 80.Interior clamping washer 340 can limit shoulder 342, also provides support the surface for it with the central small hole of operatively holding saw blade 80.Can see clearly that in Figure 11 and 12 lining 325 of following saw blade guard block 302a can limit thin-walled portion 346.This thin-walled portion 346 allows axle 322 to be located adjacent to the position of processing work, so saw blade 80 (Figure 13) is positioned at the position near processing work, so that darker being cut in the workpiece in cutting process.Interior clamping washer 340 is press fitted on the Outboard Sections 350 of axle 322.Outboard Sections 350 at assembling outer bearing 330 and inner bearing 332 places limits diameter D4 (Figure 13).Shoulder 342 places of interior clamping washer 340 limit diameter D5.Diameter D4 is less than diameter D5.Have the shoulder 342 that increases diameter D5 and be convenient to the correct centering of saw blade 80.Like this, diameter D5 can also with the diameter basically identical of the central small hole 354 of circular saw blade 80.

Another saw blade protection assembly 300b has been shown among Figure 14 to 16.Be appreciated that except that mentioning the other parts of annular saw 10b usually can be similar to the annular saw 10 (or any other annular saw described herein) shown in above-mentioned and Fig. 1 to 4 herein.In this embodiment, following guard block 302b is pivotally mounted on the gear-box 36b, and its mounting points is positioned on the straight line on output shaft 22 vertical direction, and this mounting points is positioned at the top of output shaft 22 when base plate 16 is adjusted to maximum depth of cut.Following guard block 302b can comprise support 400, and this support 400 can limit axial trough 402 and pivot aperture 404.Output axle 22 is held by axial trough 402, and the pin 408 that is fixedly attached to gear-box 36b holds by pivot aperture 404.Pin 408 can be conventional alignment pin, rivet or may be the column part of securing member, for example soket head cap screw or the shoulder screw is arranged.Figure 14 is illustrated in the following guard block 302b under the complete closure state; Figure 15 is illustrated in the following guard block 302b under the state of partially opening; Figure 16 is illustrated in the following guard block 302b under the full open position, wherein descends guard block 302b partly not to be set directly at output shaft 22 belows.As shown in figure 14, the zone 410 of 180 degree above base plate 16 can fully hold guard block 302b (in fully open position shown in Figure 16) down.

Figure 17 to 19 shows another saw blade guard block 300c.Be appreciated that except that mentioning the remainder of annular saw 10c usually can be similar to the annular saw 10 shown in above-mentioned and Fig. 1 to 4 (perhaps any other annular saw of describing) herein herein.In this embodiment, adopt linkage 500 will descend guard block 302c to be pivotally connected on the gear-box 36c.In addition with reference to Figure 20 to 22, linkage 500 can comprise first or Z-shaped connecting rod 510, the second or L shaped connecting rod 512, the three or I shape connecting rod 514 and the 4th connecting rod 516.First connecting rod 510 can comprise the first arm 520, can be connected to second arm 522 of the first arm 520 ends, generally vertically extends therefrom with relative terminal the 3rd arm 524, the three arms 524 that are connected to second arm 522.When guard block 302b rotated into the fully open position instantly, the first arm 520 can be directed the space 526 so that the end that can hold second arm 522 to be provided.

The first pivot aperture 540 can be formed on the near-end of the first arm 520, the core that the second pivot aperture 542 can be formed on the 3rd arm 524 (promptly, at two of the 3rd arm 524 relatively on the point between the end), the 3rd pivot aperture 544 can be formed on the end of the 3rd arm 524.The first pivot pin (not shown) can comprise pin; the column part of rivet or securing member, soket head cap screw for example, it is housed inside in the first pivot aperture 540; and be connected with following guard block 302c, so that first connecting rod 510 is pivotally connected to guard block 302c down.Second connecting rod 512 can comprise the 4th arm 550 and the 5th arm 552.The 4th pivot aperture 556 can be formed on the near-end of the 4th arm 550.The 5th arm 552 can be connected on the far-end of the 4th arm 550 and usually and vertically extend therefrom.Wushu axle aperture 558 can be formed on the far-end of the 5th arm 552, and first stop component 560 can be connected to the far-end of the 5th arm 552.The second pivot pin (not shown) can comprise pin, the column part of rivet or securing member, and soket head cap screw for example, it can pass the 4th pivot aperture 556 and be connected to down on the guard block 302c, so that second connecting rod 512 is pivotally attached to down on the guard block 302c.

Third connecting rod 514 can comprise the 6th pivot aperture 570 that is shaped by its near-end, by the 7th pivot aperture 572 of its far-end shaping,, and second stop component 574.The 3rd pivot pin (not shown) can comprise pin, the column part of rivet or securing member, soket head cap screw for example, it can pass Wushu axle aperture 558 and the 6th pivot aperture 570, with second and third connecting

rod

512 and 514 be pivotally attached to together.The 4th pivot pin (not shown) can comprise pin, the column part of rivet or securing member, soket head cap screw for example, it can pass the 7th pivot aperture 572 and be admitted and be connected on the gear-box 36c (Figure 17), so that gear-box 36c (Figure 17) is pivotally attached to third connecting rod 514.The 4th connecting rod 516 can comprise the 8th pivot aperture 580 that is shaped by its near-end, the 9th pivot aperture 582 that is shaped in the position of the most close the 8th pivot aperture 580 by the 4th connecting rod 516 and the tenth pivot aperture 584 that is shaped by the 4th connecting rod 516 far-ends.Wushu pivot pin (not shown) can comprise pin, the column part of rivet or securing member, and soket head cap screw for example, it can pass the 4th pivot aperture 556 and the 8th pivot aperture 580 is admitted, so that the second and the 4th connecting

rod

512 and 516 is pivotally attached to together.The 6th pivot pin (not shown) can comprise pin, the column part of rivet or securing member, and soket head cap screw for example, it can pass the second pivot aperture 542 and the 9th pivot aperture 582 is admitted, so that the first and the 4th connecting

rod

510 and 516 is pivotally attached to together.The 7th pivot pin (not shown) can comprise pin, the column part of rivet or securing member, soket head cap screw for example, it can pass the tenth pivot aperture 584 and be admitted and be connected on the gear-box 36c (Figure 17), so that the 4th connecting rod 516 is pivotally attached on the gear-box 36c (Figure 17).

In the present embodiment that provides, following guard block 302c can be switched to the closed position, when this position its arch formula outer rim be arranged on output axle 22 below.Shown in Figure 20 to 22, when guard block 302c rotated to its full open position instantly, linkage 500 was convenient to following guard block 302c is rotated to export axle 22 (Figure 17) concentric or approaching concentric.When guard block 302c is positioned at complete closed position instantly; first stop component, 560 contacts the 4th connecting rod 516; and second stop component, 574 contacts the 4th connecting rod 516 is to prevent down that guard block 302c is with respect to housing assembly 12 further rotation on closing direction.

With reference to Figure 23 to 25, Reference numeral 10d has represented another part according to the annular saw of this novel teachings structure.Except that mentioning, annular saw 10d can the mode similar to the annular saw 10 shown in Fig. 1 to 3 (or any other annular saw described herein) construct herein.Annular saw 10d can comprise housing assembly 12d, CD-ROM drive motor assembly 14d and base plate 16.Housing assembly 12d can comprise first and

second case members

30 and 32 and gear-box 36d, and this gear-box 36d can comprise first housing parts 600 and second housing parts 602.

CD-ROM drive motor assembly 14d can comprise the motor (not shown), transmission device 20d, idler axle 610, output axle 612, belt 614 and strainer (not shown).Motor (for example motor among Fig. 1 18), transmission device 20d and idler axle 610 can be housed in first housing parts 600, and output axle 612 can be housed in second housing parts 602 and strainer can connect together first and second housing parts 600 by adjustable ground with 602.

The motor (not shown) provides rotary power can for transmission device 20d, and the exportable rotary power of transmission device 20d is to idler axle 610.In the present embodiment, transmission device 20d comprises a plurality of gears, wherein includes output gear (not specifically illustrating).The pair of bearings (not shown) can be contained in first housing parts 600, and rotatably supports output gear.One of ordinary skill in the art will appreciate that, the first gear (not shown) can be connected to (not shown) on the output shaft of motor, and can mesh with another gear (not shown) among the transmission device 20d, and rotary power can be by the one or more gear transmission in the transmission device to output gear.

Second housing parts 602 can be general v-shaped structure, and it can limit arbor support 620, belt guard 622 and a plurality of guide post 624.Arbor support 620 can limit pair of bearings support 630, and this support of bearing 630 constitutes and can hold pair of bearings, for example needle bearing 634 and ball bearing 636, and it can support output axle 612 rotatably at the front end place of second housing parts 602 (being the summit).Belt guard 622 can be circulus, its configurable idler axle 610 that also covers in when first and

second housing parts

600 and 602 interconnect around idler axle 610.The first belt aperture 640 can be configured as by belt guard 622, the second belt apertures 642 and can be shaped as front end by second housing parts 602 between the support of bearing 630.Guide post 624 can be outstanding from the remainder of second housing parts 602, and can engage corresponding pillar contained structure 650.Guide post 624 and pillar contained structure 650 can interact so that second housing parts 602 is installed on first housing parts 600 slidably.

Can be connected with output gear in order to rotate idler axle 610, idler axle 610 stretches out in the mode of cantilever from here, and can be arranged in the dimple (not specifically illustrating) that forms in first housing parts 600.

Output axle 612 can be installed on needle bearing 634 and the ball bearing 636, and removably is contained in the support of bearing 630.But threaded fastener 654 precessions be contained in output axle 612 end on hole (not specifically illustrating) in, and can be used to circular saw bit regularly but be detachably connected to output axle 612 on.In this specific embodiment, needle bearing 634 and ball bearing 636 are press-fitted in second housing parts 602, and needle bearing 634 and ball bearing 636 still remain on their position when the output axle removes from second housing parts.Suitable holding device, for example spring clip (not specifically illustrating) can be used to the output axle is remained in the ball bearing 636.

Belt 614 can be contained in the top and idler axle 610 tops of the output axle 612 between needle bearing 634 and the ball bearing 636.In one embodiment, belt 614 is substantially equal to the diameter of belt across wherein output axle 612 across the diameter of wherein idler axle 610.Should be realized that,, can realize the increase of depth of cut by keeping the diameter less relatively (that is, for example being substantially equal to the diameter of jackshaft 610) of output axle.

Strainer can be used for making second housing parts 602 to move to the enough numerical value of transmitting rotary power (via belt 614) between idler axle 610 and output axle 612 with respect to first housing parts 600, so that tightening belt 614.Any suitable strainer can adopt, and comprises that spring loads (automatically) tensioning apparatus.In this specific embodiment, adopt the jackscrew (not shown) that second housing parts 602 is moved with respect to first housing parts 600.Jackscrew can precession be contained in (not shown) in the respective threads sleeve pipe, and this threaded sleeve can be fixedly connected to also can be in abutting connection with the wearing plate (not specifically illustrating) that is installed on first housing parts 600 on second housing parts 602.Threaded sleeve and wearing plate can by high-abrasive material for example hardened steel shape, to increase durability.

When belt 614 is installed on the output axle 612, strainer can be operated so that move second housing parts 602, output axle 612 is quite near idler axle 610 like this, and output axle 612 can be extracted out from the support of bearing 630 at least in part, so that output axle 612 is left the second belt aperture 642.Belt 614 can pass the second belt aperture 642 and the first belt aperture 640 cooperates, and can be engaged in idler axle 610 tops.Output axle 612 can be inserted in the support of bearing 630, so that belt 614 is configured between needle bearing 634 and the ball bearing 636.Strainer can be operated to drive second housing parts 602 away from first housing parts 600.In this respect, 650 cooperations of guiding pillar 624 and pillar contained structure to be guiding second housing parts 602 to move with respect to first housing parts 600, and this is because second housing parts 602 moves by strainer.

With reference to Figure 26 to 28, another annular saw according to this novel instruction structure is represented by Reference numeral 10e.Except that mentioning, annular saw 10e can construct with the similar mode of the annular saw 10 shown in Fig. 1 to 4 (or any other annular saw described herein) and form herein.

Annular saw 10e can comprise CD-ROM drive motor assembly 14e, and this CD-ROM drive motor assembly 14e comprises that (18e, Figure 27), (20e Figure 27), exports roller 700 to transmission device to motor, reaction roller 702 and support axle 704.Motor 18e can exchange, and motor direct current or ac/dc, motor can provide the rotation that is received by transmission device 20e output.Transmission device 20e can be the suitable reducing gear of any kind, for example gear reduction.Transmission device can comprise the driven output block 710 that is rotatably connected with output rod 700.Though output block 710 is depicted as thread spindle, it also can be level and smooth axle or any other rotation transmission part.Correspondingly, transmission device 20e operationally transmits revolving force from motor 18e to output roller 700.In another embodiment, transmission device not necessarily.If it is appropriate that the diameter of output roller 700 is selected, needed deceleration just can realize between output roller 700 and blade so.About 4: 1 to 5: 1 deceleration is preferred.If therefore the diameter of output roller 700 be 700 contacts of output roller saw blade 80 diameters 1/4 or 1/5, all decelerations will be finished at roller/blade chances of losing games place.

Output roller 700 can be installed in support axle 704 and be installed between the circumferential edges 80a of the circular saw bit 80 on the annular saw 10e.Reaction roller 702 can be installed on the gear-box 36e of relative output roller 700.Reaction roller 702 can and can be shifted and/or pivot with respect to the turning cylinder of output roller 700 around the rotation of reaction Roller Shaft, so that mobile reaction Roller Shaft.Can adopt any suitable device so that control moving of reaction roller 702.In the present embodiment, adjusting device comprises axle 750, suspension bracket 752, bias spring (do not specifically illustrate with the related of arm 754, but illustrate and the related bias component 760 of arm 762 that supports output roller 700) and jackscrew (not specifically illustrating).Bias component can provide in the arm 754,762 one or two like this, applies suitable tension force so that help between roller 700,702 and blade 80.Can hold axle 750 and can be installed on the arm 754 of suspension bracket 752 by reaction roller 702.Suspension bracket 752 pivotable being installed on the gear-box 36e.The bias spring suspension bracket 752 of may setovering in one direction, this direction moves reaction roller 702 towards output roller 700.Can adopt jackscrew pivot suspension bracket 752 so that the reaction roller can be shifted to or away from output roller 700.Selectively, the method for mobile reaction roller 702 comprises the mode (not shown) of the suspension bracket 752 that can be slidingly installed.Be appreciated that the mode that output roller 700 and reaction roller 702 can any requirements is shaped, for example common cylindrical or in the frusto-conical shown in the corresponding accompanying drawing.

Support axle 704 and can be installed on the bearing, for example be arranged on the needle bearing 780 and ball bearing 782 on the gear-box 36e.Support axle 704 and can comprise jockey, the internal thread hole (not specifically illustrating) that circular saw blade 80 is connected.Internal thread hole can hold securing member 820, and this securing member 820 can be fastened to prevent that circular saw blade 80 from shifting out from support axle 704.

Reaction roller 702 can move away from output roller 700 by jackscrew, supports on the axle 704 to allow circular saw blade 80 can be contained between them and to be installed in.Securing member 820 is connected to and supports on the axle 704 to prevent that circular saw blade 80 from shifting out from support axle 704.Actuatable jackscrew causes circular saw blade 80 to be clamped between reaction roller 702 and the output roller 700 to drive reaction roller 702 towards output roller 700.The operation of motor causes exporting roller 700 rotations.When circular saw blade 80 is clamped between output roller 700 and the reaction roller 702, the rotation of output roller 700 will cause the corresponding rotation of circular saw blade 80.

Referring now to Figure 29, shown CD-ROM drive motor assembly 14f operationally is associated with gear-box 36f.Except that mentioning, mode is constructed and is formed like any other CD-ROM drive motor component class that CD-ROM drive motor assembly 14f can describe herein herein.Gear-box 36f rotatably supports output axle 22f.In one embodiment, output axle 22f is supported by needle bearing 68f.Be appreciated that in one embodiment supported rotatably (for example needle bearing 68, Fig. 4) by needle bearing for output axle 22f.Similarly, in one embodiment, gear-box 36f provides the sidewall of relative thin in the perimeter 830 of output axle 22f.Parallel offset amount 832 is defined as the distance between the outmost surface of the center line 834 of output axle 22f and the thin sidewalls 830 gear-box 36f of place.The parallel offset amount may be 0.625 inch or still less.Be appreciated that output axle that such structure provides is positioned relatively the position near workpiece to be machined, and so that saw blade (for example 80, Fig. 1) may obtain bigger cutting depth (that is, at least 3 inches, saw blade diameter for example described herein is 7.25 inches).

Referring now to Figure 30 and 31, another CD-ROM drive motor assembly according to this novel teachings structure is represented by Reference numeral 14g.Be appreciated that CD-ROM drive motor assembly 14g can be applicable to any annular saw described herein.Can understand from following, CD-ROM drive motor assembly 14g provides the gear reduction of expectation in relative tight space.Therefore, output axle 22 can be positioned at relatively the position near workpiece to be machined, to reach the purpose that cutting depth is increased as described herein.CD-ROM drive motor assembly 14g can comprise motor 18g (Figure 31) and output axle 22.Motor 18g comprises having and is configured in the terminal worm screw or the output shaft 850 of first worm gear 852.CD-ROM drive motor assembly 14g can also comprise the jackshaft 856 with second worm gear 860 and countershaft-gear thereon 862.First worm gear 852 and second worm gear 860 mesh for rotation.Countershaft-gear 862 meshes for rotation with the output gear 58 of output axle 22.Bearing 866 rotatably supports the opposing ends of jackshaft 856.Bearing 866 can be supported in the gear-box (not specifically illustrating).According to the embodiment of CD-ROM drive motor assembly 14g, output axle 22 revolutions 1 circle, jackshaft 856 rotations are less than 1 circle.Motor output shaft 850 can be configured to export axle 22 and whenever revolve and turn around, and motor output shaft approximately rotates 5 circles.First gearratio can be limited between first worm gear 852 and second worm gear 860.Second gearratio can be limited between countershaft-gear 862 and the output gear 58.According to this novel embodiment, first gearratio is greater than second gearratio.In one embodiment, first worm gear 852 has a screw thread beginning, and second worm gear 860 has 19 threads 870.Countershaft-gear 862 has 44 teeth 872.Output gear 58 has 11 teeth 874.In one embodiment, first gearratio is 19: 1, and second gearratio is 11: 44.In general, first gearratio greater than zero and second gearratio less than zero.In this application, first gearratio has reduced rotation (that is, first worm gear, 852 to second worm gears 860) significantly, and second gearratio quickens rotation (that is, countershaft-gear 862 is to output gear 58).The structure of CD-ROM drive motor assembly 14g makes the speed ratio of jackshaft 856 export the slower of axle 22." saw of depth of cut will be very difficult, be preferred because help to pack relatively little output gear 58 not have this characteristic Design 3.Those skilled in the art will expect to provide other structure of other gearratio.

Although the narration and illustrating in the accompanying drawings in specification of specific example example is appreciated that various changes that those of ordinary skills may make and being equal to of element is substituted all not break away from this novel claim institute restricted portion.And, can imagine in each embodiment and feature, element and/or function can be mixed and collocation, therefore from novel specification those of ordinary skills can understand can suitable being attached in another example with feature, element and/or the function among the embodiment, only with described above opposite.In addition, a lot of improvement of special situation of the adaptation of making according to this novel instruction or material essential scope of not breaking away from the application.Therefore, the content that the application discloses is not limited in the most preferred embodiment of describing in description of drawings and the specification, implement the best mode of this novel teachings and can estimate at present, thereby this novel content that discloses comprises any embodiment that describes in front and additional claim.

The application requires in the priority of the U.S. Provisional Application No.60/993564 of on September 13rd, 2007 application, and above-mentioned application is introduced in the literary composition as a reference.

Claims

1, a kind of annular saw is characterized in that, comprising:

Housing assembly;

Be connected the CD-ROM drive motor assembly on the housing assembly;

Output block by the driving of CD-ROM drive motor assembly;

Adjustable ground is installed in the base plate on the housing assembly; And

Diameter is about 7.3 inches circular saw blade,

Wherein said base plate can be conditioned, to provide more than or equal to about 3.0 inches depth of cut.

2, annular saw according to claim 1 is characterized in that, described output block limits the output gear that rotatably supports with respect to housing assembly, output gear have with in abutting connection with first end of circular saw blade and second end of relative circular saw blade.

3, annular saw according to claim 2 further comprises the clutch shaft bearing of first end that rotatably supports output gear, and second bearing that rotatably supports second end of output gear, and wherein clutch shaft bearing is a needle bearing.

4, annular saw according to claim 3 is characterized in that, the output axle that described output block concentrated area limits output gear and is shaped integratedly, and wherein circular saw blade is fixed on the output axle for rotation.

5, annular saw according to claim 4 is characterized in that, described output gear limits external diameter, and clutch shaft bearing limits internal diameter, and wherein the external diameter of output gear is less than the internal diameter of clutch shaft bearing.

6, annular saw according to claim 1 is characterized in that, described output block is supported in the gear-box of housing assembly, and wherein the far-end of gear-box limits front end, and wherein front end is applicable to and is contained at least in part in the aperture that is shaped by base plate.

7, annular saw according to claim 1, it is characterized in that, described CD-ROM drive motor assembly limits idler axle, and this axle is driven by the CD-ROM drive motor rotation and supported by the gear-box of housing assembly, and the CD-ROM drive motor assembly comprises from the belt of middle axle to the output block transferring rotational motion.

8, annular saw according to claim 7 is characterized in that, described belt is substantially equal to the diameter of belt across wherein output block across the diameter of wherein idler axle.

9, annular saw according to claim 7, it is characterized in that, described output block rotatably is supported on first end by the clutch shaft bearing that is supported by gear-box, and rotatably be supported on second end by second bearing that is supported by gear-box, wherein belt engages output block at the zone line of first and second ends of output block.

10, annular saw according to claim 9 is characterized in that, described clutch shaft bearing is defined as needle bearing, and second bearing is defined as ball bearing.

11, annular saw according to claim 1 is characterized in that, the CD-ROM drive motor assembly comprises:

Motor;

Extend and have the motor output shaft of first worm gear thereon from motor;

Jackshaft with second worm gear and countershaft-gear; And,

Output block with output gear;

Wherein first worm gear and second worm gear mesh for rotation, and countershaft-gear and output gear mesh for rotation.

12, annular saw according to claim 11 is characterized in that, described jackshaft limits axis, and this axis extends substantially transversely to the axis that is limited by motor output shaft.

13, annular saw according to claim 12 is characterized in that, revolution 1 circle of described output block, and the jackshaft rotation is less than 1 circle.

14, annular saw according to claim 13 is characterized in that, described output block revolution 1 circle, and motor output shaft rotates about 5 circles.

15, annular saw according to claim 14, it is characterized in that, described first gearratio is limited between first and second worm gears, second gearratio is limited between countershaft-gear and the output gear, and what wherein one of first and second gearratios caused rotating reduces, and another of first and second gearratios causes the increase of rotating.

16, annular saw according to claim 15 is characterized in that, described first worm gear has 1 screw thread beginning, and second worm gear has about 19 threads.

17, annular saw according to claim 16 is characterized in that, described countershaft-gear has about 44 teeth, and output gear has about 11 teeth.

18, annular saw according to claim 1, it is characterized in that, described CD-ROM drive motor assembly comprises the motor that drives the output roller, and the output roller rotatably engages the first flat side of circular saw blade, in order to around the rotating shaft transferring rotational motion of circular saw blade on circular saw blade.

19, annular saw according to claim 18 is characterized in that, described output roller directly and the first flat engage sides of circular saw blade.

20, annular saw according to claim 18 further comprises the reaction roller, and its second flat side against the circular saw blade of relative first plane surface disposes rotatably.

21, annular saw according to claim 20 is characterized in that, at least one in described output roller and the reaction roller is biased to the first flat engage sides with circular saw blade.

22, annular saw according to claim 21 is characterized in that, described reaction roller is around the idle running of reaction Roller Shaft.

23, annular saw according to claim 1, it is characterized in that, described CD-ROM drive motor assembly further comprises gear case assembly, this gear case assembly rotatably supports output block, and the center line and the gear case assembly that wherein are limited to output block are less than or equal to about 0.6 inch in the parallel offset amount between the outmost surface on the direction of processing work.

24, a kind of annular saw is characterized in that, comprising:

Housing assembly;

Be connected on the housing assembly and comprise the CD-ROM drive motor assembly of the output block that supports circular saw blade drivingly;

Rotatably support output block and comprise the gear case assembly of first and second gear-boxes, qualification bearing aperture in first and second gear-boxes and seal groove;

Qualification is fixedly mounted in the needle bearing of the outer race in the bearing aperture; And

Be configured in the seal between first and second gear-boxes, seal is configured in the seal groove, and wherein the part of seal directly engages the outer periphery of outer race.

25, annular saw according to claim 24, it is characterized in that, described seal groove is further limited by first and second portion, first comprises the first side wall and second sidewall that is formed on one of first and second gear-boxes, and second portion comprises the part of the neighboring of the first side wall and outer race.

26, annular saw according to claim 25 is characterized in that, described seal comprises O shape circle.

27, annular saw according to claim 24 further comprises the driven gear that is contained in the gear case assembly, and driven gear and output block rotatably mesh.

28, annular saw according to claim 25 is characterized in that, described gear case assembly comprises the fluid that is configured in wherein.

29, annular saw according to claim 25 is characterized in that, described circular saw blade limits about 7.3 inches diameter, and wherein base plate can be adjusted to provide more than or equal to about 3.0 inches cutting depth.

30, a kind of annular saw is characterized in that, comprising:

Housing assembly;

The protective blade assembly that comprises the bottom knife protecting component that limits lining; And

The clutch shaft bearing of the external diameter that has opening and keep regularly by lining, wherein output block extends by opening.

31, annular saw according to claim 30 further comprises second bearing, and second bearing and clutch shaft bearing laterally separate, and have with output block for the fixing internal diameter of rotation with by the fixing external diameter that keeps of lining.

32, annular saw according to claim 30 is characterized in that, the diameter that the internal diameter of described clutch shaft bearing limits less than the aperture that forms by circular saw blade.

33, annular saw according to claim 32 further includes and selectively is fixed on the output block and the clamping washer of fixed clutch shaft bearing laterally.

34, a kind of annular saw is characterized in that, comprising:

Housing assembly;

Be connected on the housing assembly and comprise around saw blade axis and support the CD-ROM drive motor assembly of the output block of circular saw blade drivingly; And

Comprise the protective blade assembly that rotatably is installed to the bottom knife protecting component of housing assembly around the axle of bottom knife protecting component;

Wherein said saw blade axis is concentric with respect to the axle right and wrong of bottom knife protecting component.

35, annular saw according to claim 34 is characterized in that, described bottom knife protecting component rotatably is installed on the shoulder screw that is fixed on the housing assembly.

36, annular saw according to claim 34 is characterized in that, described bottom knife protecting component rotatably is installed on the gear-box of housing assembly, and gear-box rotatably supports output block.

37, annular saw according to claim 34, it is characterized in that, described bottom knife protecting component limits the axle groove, the axle groove was basically around output block when wherein the protective blade parts were in complete closing position instantly, and the axle groove moved to the position of departing from output block when the protective blade parts were in a fully open position instantly.

38, a kind of annular saw is characterized in that, comprising:

Housing assembly;

Be connected on the housing assembly and comprise around saw blade axis and support the CD-ROM drive motor assembly of the output block of circular saw blade drivingly;

The protective blade assembly that comprises the bottom knife protecting component; And

The bottom knife protecting component is operably connected to the push and pull system of housing assembly,

Wherein said bottom knife protecting component is restricted by push and pull system, so that concentrate the relevant position at center, move to second concentrated position of in the second place of circular saw blade, locating the bottom knife protecting component from relative to the primary importance of circular saw blade, locating first of bottom knife protecting component, the first and second position differences wherein are so that around the single axle rotation coaxial with the longitudinal axis of output block.

According to the described annular saw of claim 38, it is characterized in that 39, described bottom knife protecting component is restricted by push and pull system, so that around the single axle rotation coaxial with the longitudinal axis of output block.

According to the described annular saw of claim 38, it is characterized in that 40, described push and pull system comprises at least four connecting rods.

41, a kind of annular saw is characterized in that, comprising:

Housing assembly;

Be connected to the CD-ROM drive motor assembly of housing assembly;

Output block with output gear, output block is driven by the CD-ROM drive motor assembly, and comprises:

Motor;

Extend and have the motor output shaft of first gear thereon from motor;

Jackshaft with second gear and countershaft-gear; With

Wherein said first gear and second gear mesh for rotation, and countershaft-gear and output gear mesh for rotation; And

Wherein from the motor output shaft to the jackshaft, limit gear reduction, from the jackshaft to the output block, limit gear up.

42,, comprise that further adjustable ground is installed to the base plate on the housing assembly according to the described annular saw of claim 41; And

The circular saw blade that has about 7.3 inches diameter and be connected for rotation with output block;

Wherein said base plate can be conditioned so that provide more than or equal to about 3.0 inches cutting depth.