Lower blade guard actuating mechanism for silide compound miter saw

In the detailed description of the embodiment of the invention previously, it should be understood, the invention is not influenced by the following specification or [...] resettlement of the part shown in and limited by the details of the structure of. The invention has other embodiments, and adopts a plurality of method is implemented. Also to be understood that the terminology used herein is used for illustrative purposes and terminology, and should not be subject to this limitation.

As shown in Figure 1 shown in a [...] of this invention is the implementation of the sliding compound miter saw 10, the sliding compound miter saw 10 with a platen 14, the platen 14 includes a support 18, it has four anchor 22 (Figure 1 is shown in the only two), is used for the miter saw 10 is supported on a surface, in other words, the upper surface 26 and a lower surface 30 (only Figure 2 and Figure 3 show). The support 18 also includes the support 18 adjacent the front of the peripheral edge 34, the circumferential edge 34 includes a lower surface 38 (only Figure 2 and Figure 3 show) and forward of the support surface of the face 46, the lower surface 38 provided with a plurality of pawl receiving groove 42. Platen extending part 50 is fixed to the support 18 is, the platen extending part 50 includes an upper surface 54.

Platen 18 includes a is fixed to the support 18 of the rotary table 58, for around the vertical axis 60 as the pivot movement, turntable 58 includes an upper surface 62, support 18, platen elongate portion 50 and a turntable 58 of the upper surface 26, 54 and 62 to form a smooth continuous workpiece supporting surface, in order to support a workpiece during cutting of the workpiece. Table 58 of the upper surface 62 is provided with an opening 66, the kerf plate 70 is placed in the opening 66 in, the kerf plate 70 to provide an auxiliary role of supporting the work piece, guard 74 is placed in the work piece support surface, in order to provide further support to the work piece, turntable 58 also includes a lower surface 78 (as shown in Figure 2-4) and [...] member 82, which with one end part 86, peninsula member extends forwardly from the turntable, and the turntable are connected together in the middle.

As shown in Figure 2 and 3, the spring element 90 and the turntable 58 is connected with the bottom of the, U.S. 5,249,496 of shown and described in patents with a similar spring member, for in this incorporated reference. A spring member 90 including the rotary table 58 of the lower surface of the 30 one end of the link 94, and includes opposite end 98. A spring component 90 includes on the end 94 and 98 the central portion of the between 102, the pawl 106 is received in the central portion 102 inner, the spring member 90 positioning according to the following way, the pawl 106 deflection to the circumferential edge 34 of the lower surface 38, in this way, when the pawl 106 is in the pawl receiving recess 42 in the vicinity of the, pawl 106 deflected into the recess 42 inner, in order to ensure that the support 18 is relatively, the turret 58 on the adjustment at a specific position.

Platen 14 also comprises mounting the peninsula member 82 of the lower surface 78 of the supporting member 110, a pull rod supporting member 110 includes opposite ends 114 and 118, end 114 and the turntable 58 of the lower surface of the 78 is connected, with the peninsula member 82 adjacent, end 118 includes a pair of downward extending U-shaped clip, pull rod support member 110 also includes an inclined central portion 126, with the opening in the 130 (as shown in Figure 5).

Table 14 also includes a tie rod 134, which is provided with a formed drive handle 138 of the end of the 1st, located in actuating handle 138 of the locking plate 142, and a spring member 90 [...] of 98 is connected with a 2nd end of the pivot 146, and the central portion 150. The central portion 150 with the consecutive interlinked rows 154 is connected with the U-shaped clamp pivot, therefore, end 138 is caused at the end 146 of the downward movement, and a spring member 90 against the deflecting force, in order to make the pawl from special detent receiving groove 42 is released in, so will its positioning, so as to release the rotary table 58, the shaft 60 for pivotal movement, and, in order to achieve the purpose of necessary around the pawl receiving groove 42 for micro-angular adjustment, in this way, the pawl 106 positioning. Flexible fasteners 158 (as shown in Figure 4 and 5) is fixed in the peninsula member 82 above the rotary table 58 of the lower surface of the 78 upper, flexible fasteners 158 receiving the pull rod 134 of the locking plate 142, in order to ensure that the rod 134 on the pawl withdrawal position. When the lift of the driving handle 138, moved to the pawl when the pawl withdrawal position, flexible fasteners 158 towards the pull rod 134 caused by movement of the flexible latches 158 and locking plate 142 of the locking joint, in order to guarantee the pawl 106 in detent withdrawing position, and the rotary table 58 relative to the support 18 for free pivotal movement.

Table 14 also includes fixed on the rotary table 58 of the lower surface 78 of the locking bracket 166 (Figure 2, 3 and 5 shown), locking bracket 166 comprises a fixed portion 170, with spaced apart from each other in the opening. A pair of screw fasteners 174 (only one of them is shown) extends into the opening, and into the table 58 in, in order to the locking bracket 166 fixed to the turntable 58 on. Locking bracket 166 also includes friction extending part 182 and the support projecting part 178, in which with the opening 186. A supporting rod 190 extends into the pull rod support member 110 in the opening of, and through the supporting extensions 178 opening 186, therefore, the supporting rod 190 by a pull rod supporting member 110 and the locking bracket 166 support, and, a supporting rod 190 one end 194 and the friction extending part 182 are jointed.

Table 14 also includes a hexagonal end portion 202 of the threaded nut 198 (Figure 5 shown) and the end 202 and the outer circle of the central portion 210 extends between the axis 206. Nut 198 is fixed in the opening 214 of the peninsula member 82 the end of 86 the upper, opening 214 formed on the rotary table 58 of the lower surface of the 78 the inner. The opening 214 is sailing speed, in conformity with the outline of and, in order to prevent the nut 198 and rotating axial movement, screw 218 extends into the nut 198 and and the belts 190 contact, handle 222 and the screw 218 is connected, in order to facilitate the rotation thereof, causes the screw 218 relative to the platen 14 in the axial direction, the screw 218 A guided along the arrow (Figure 2) in the direction of the axial movement of the rod 190 end 194 towards friction elongate portion 182 motion, arranged friction elongated 182 re-support to the support 18 support surface 46 is, in order to the turret 58 relative to the support 18 is fixed in place, with respect to the edge of the peninsula and 34 of the lower surface 38 of the pawl 106 of the position-independent.

Figure 1 and 6 the most clearly shown, the platen 14 also comprises mounting the rotary table 58 of the main support shaft 226, a main supporting shaft 226 very high hardness of the chrome-plating of the steel pipe, the main supporting shaft 226 one end 230 is, a portion of the pipe fitting is removed, formed therein with a pair of through bore 234 (only Figure 1 shown) of the jet member. A screw rod (not shown) each extends downward through bore, into the rotary table 58 of the upper surface 62 in, so as to connect the main support shaft 226 is fixed on the rotating platform 58 on. The main supporting shaft 226 also includes a pair of ends 238 (Figure 7 is shown with a dashed line), and with the end portion 230 and 238 extending between the axial lead 242 (only Figure 7 shown). In the preferred embodiment, with the turntable axis line 58 on the upper surface of the on the is in the same plane.

Table 14 also includes with [...] 250 (Figure 6 shown) and 254 (Figure 14 shown) of the auxiliary support shaft 246, it is a kind of through hardened chromium-plated steel pipe. With the master support shaft 226 end 230 adjacent, two piece extends into the auxiliary shaft 246 and support member 258 and into the rotating platform 58 on the upper surface of the fastener (not shown) of the support member 258 and the auxiliary support shaft 246 end 250 is fixed to the rotary table 58 of the upper surface 62 on.

With the coupling 266 (Figure 7 and 14 shown) the main support shaft 226 end 238 and the auxiliary support shaft 246 end 254 connected together, coupling 266 includes a precision cavity 270 and a low allowable tolerance cavity 270, the former is used for the main support shaft 226 wherein the acceptance of the end of the latter for the auxiliary support shaft 246 end 254 on its inner. See Figure 7 and 13, fastener 278 extends into the coupling 226, and through the main supporting shaft 226 end 238, which is used for the main support shaft 226 is fixed on the [...] 270 inside. Nut 282 (only Figure 13 shown) of the bolt by the passageways 278 is, in order to install the bolts 278 is fixed on the coupling 266 on. As shown in Figure 14 the most clearly indicate, coupling 266 also includes a pair of opposed threaded through bore 286, the cavity with the low allowable tolerance 274 communicated. A group of screw 290 are respectively [...] 286 inner, is used for the auxiliary support shaft 246 is fixed to the coupling 266 on, and the auxiliary support shaft 246 of the end portion 254 to the position of the device in the low allowable tolerance 274 within, in this way, in the main supporting shaft 226 of the axial lead 242 and the auxiliary support shaft 246 between the axes of the of the line is in the same plane and the position of the parallel relations will be easy to adjust.

Sliding compound miter saw 10 also includes cutting device 294 (Figure 1 shown), the cutting device 294 includes a mounted on the main support shaft 226 of the inclined support member 298, as shown in Figure 12 the most clearly indicate, the inclined support member 298 has 1st and 2nd supporting part 302 and 306, the supporting part 302 and 306 are connected together, forming a radially extending through bore 310, the main supporting shaft 226 extends through the through-cavity. The open lumen 310 is provided with a longitudinal extending axis, through cavity 310 includes the side wall of the axial opposite ends 314 (Figure 7 shown), each part has seven formed therein a radially-extending side of the pocket 318 (Figure 12 shown). Penetration cavity 310 also includes a substantially smooth cylindrical central portion 322, its internal diameter is slightly larger than the end 314 of the inner diameter.

Through bore 310 to cover the a pair of shrouded linear bearing member 326 (Figure 7 shown), which is arranged on the main supporting shaft 226 and through bore 310 of the side wall. As shown in Figure 8, bearing member 326 industrial product, as shown in the Figure the bearing member 326 by INA   Bearing   Compay, Inc. Production, KH3050PP according to the sales. Bearing member 326 includes an inner cylindrical shell portion around the inner cylindrical shell portion 330 and 330 of the housing part [...] 334, in order to form a ball bearing housing. Part of the inner shell 330 has seven formed on the 'C' -shaped lengths of 338 (Figure 8 in schematic only the 2 a), housing portion 334 has seven formed in the radial direction on the return groove 342 (Figure 8 in the schematic only 3 a). Ball bearing 346 is located in the shell of the oval channel 330 and 334 between, oval passage includes a 'of one side of the oval channel C' -shaped and disposed in the passages on the other side of the radial return groove. In this way, ball bearing 346 is exposed to the main support shaft 226 during, and after 'C' -shaped bearing pressure on the main supporting shaft 226 is, after return, ball bearing 346 is exposed to the through bore 310 of the side wall, and the interval of forming the same. When the oblique years 298 along the main support shaft 226 sliding, ball bearing 346 along the 'C' -shaped lengths lengths from 338 one end to the other end of the moving direction, after the return groove 342 back to the 1st end. Because the bearing member 326 is pressed in and through bore 310 end 314 to the adjacent support part 302 and 306 between, forming at 314 and supporting part 302 and 306 of the concave pits on the side of the supporting part is improved around the bearing member 326 [...] of. Linear bearing member 326 allow the gap passes through zero (that is, at least a portion of the single ball bearing and the main supporting shaft 326 joint), and, by adjusting the supporting part 302 and 306 of compression between, can make the cutting device 294 axial with respect to the main supporting shaft 242 for axial movement and pivotal movement.

In the present invention in the preferred manner, with the fastener 305 (diagram 7 shown) the two supporting part 302 and 306 are connected together, in order to make the bearing member 326 joint therebetween. The material of the support portion, the recess for the bearing structure and the gap 307 (Figure 12 shown) allow for the two supporting portions bearing member 326 the joint is adjusted, by adjusting or tighten fasteners 305, on the supporting part 302 and 306, bearing member 326 and the shaft 226 may be provided between the gap passes through zero.

The inclined support member 298 includes limit the rectangular opening 354 (as shown in Figure 12 is shown with dotted lines) of the back surface 350 (Figure 12 shown), the spring 358 and the spring clip 362 is connected to the back surface 350 is, in this way, at least a portion of the spring 358 extends into the opening 354 inner, and rely on spring clip 362 and 354 the synergy between the positioning thereof. Spring clip 362 includes an opposite arm 366 and 370, and with the annular cavity 378 and the groove 382 stator 374. A pair of lead screw 386 and 390 respectively extends into the cavity 378 and 382 inner, and into the inclined support member 298 in, in order to spring clip 362 is fixed to the inclined support member 298 is, and the spring clip 362 around the screw 386 within the free stroke range for the pivotal movement. Back surface 350 also includes a forming the trough 398 (Figure 7) of the arcuate frame 394, this trough extends inclined support surface 402 and the opposite vertical support surface 406. The inclined support member 298 also includes a define a pair of grooves 414 and the opening located therebetween 418 and 422 of the front surface 410 (Figure 6), the upper surface 426 (Figure 12) and extends into the upper surface 426 of the bolt 430.

Cutting device 294 also includes fixed on the auxiliary supporting shaft 246 auxiliary support member 434 (Figure 7, 10 and 13), it includes an opposite side surface 438 and 442 (only Figure 10 and 13 shown), a back surface 446, front surface 450 (Figure 7 shown) in the rear surface of and 446 and the front surface 450 of extended between 454 (Figure 10 shown). Back surface 446 limits with the cavity 454 of the opening 458, are respectively provided with a shaft 470 and 474 ball bearing 462 and 466 is fixed in the opening 458 inner, lean against the auxiliary support shaft 246 opposite side in the radial direction. Such as shown in the Figure, bearing 462 and 466 supporting the auxiliary shaft 246 on the surface of the, relative to the auxiliary shaft 246 surface rolling, in order to make the auxiliary support member 434 with respect to the auxiliary support shaft 246 in the axial direction easily. The auxiliary supporting member 434 a side surface 438 and 458 through of the screw 478. Ophiasis spring 482 is fixed in the through cavity 478 inner, and through a group of screw rod 486 will be situated in the same through bore 478 within. Adjusting a set of screw 486 changing spring 482 to the bearing 462 rotating force, in order to adjust the bearing 462 and 466 to the auxiliary support shaft 246 combined tension. As shown in Figure 11, the auxiliary support member also comprises fixed on the back surface 446 is used to cover the opening 458 cover plate 487. A cover plate 487 including cross in the bearing 462 and 466 of the opposite arm on 489, is used for providing the bearing 462 and 466 of the auxiliary support.

As shown in Figure 7 the most clearly indicate, the auxiliary supporting member 434 also includes a [...] 490, it is provided with a surface, as the inclined support member 298 bow frame 394 a supplementary. [...] 490 is completely suitable for is put into the bow-shaped frame 394 inner, so that the inclined support member 298 supporting auxiliary support member 434, relative to the main support shaft 226 the axial line of the 242 and to the accessory shaft 246 line is in the axis of the radially fixed position.

Then as shown in Figure 7, the auxiliary supporting member 434 also includes hanging on the inclined support member 298 above the arcuate frame 494. Arcuate frame 494 formed therein a groove 498, the auxiliary supporting member 434 is fixed to the inclined support member 298 is, therefore, threaded bolt 430 extends into the groove 498 inner. Nylon washer 502, steel washer 506 and nut 510 is fixed to the double-head bolt 430 on, is used for the auxiliary support member 434 is fixed on the inclined years 298 on. A handle 518 is directed to creatively is fixed on the collar 522 is, the collar 522 is of the double-head bolt tap 430 inner, shaft ring 522 has greater than nut 510 the outer diameter of the, smaller than that of the positioning steel washer 506 the inner diameter of the outer diameter of the, in this way, rotating the handle will drive the collar 522 towards the scourer 502,506 and frame 494, which is connected to arcuate ridges 490 applying pressure, in order to lean against the support surface 402 and 406 on, and the inclined support member 298 is fixed with respect to the main supporting shaft 226 of the axial lead 242 is fixed in the radial direction. See Figure 10, a pair of threaded through bore 526 and 530 are respectively formed on side surface 438 and 442 is, with the respectively [...] 526 and 530 bow-shaped frame 494 and a group of screw 534 adjacent.

Cutting device 294 also includes fixed on the auxiliary support member 434 of the sliding locking member 542 (Figure 6 shown), as shown in Figure 15 and 16, sliding locking member 542 prevent the cutting device 294 with respect to the support shaft 226 and 246 axial sliding, and include having a pair of retaining tabs 550 a brake ring 546, sheet 550 is used for the brake ring 546 and the auxiliary support member 434 is connected. Brake ring 546 also includes the through bore 558 of the elongate portion 554, the open lumen 558 with respect to the auxiliary support member 434 to the axis of the extended diameter. In the through cavity 558 is fixed in a floating piston 562, the floating piston 562 includes a [...] 566 end, with a less than [...] 566 the round head 570 the end of, the central portion of the narrow and the head 566 and 570 extends between the shaft 574. Shaft 574 is less than the open lumen 558 of the outer diameter of the inner diameter of the, end 566 has greater than penetration cavity 558 of the outer diameter of the inner diameter of the. The sliding locking member 542 also comprises a set screw located in the cavity 578, fastening screw 578 the piston 562 head 566 pressure to the auxiliary support shaft 246. The length of the piston and the head 566 diameter (as shown in Figure 16 is shown by a dashed line in) the relationship between the proportion of, any attempt to allow cutting device 294 along the auxiliary support shaft 246 axial movement of the piston will cause the inclined approach. Since [...] 566 edge of the head 562 from always greater than the linear distance [...] 566 the center of the head 562 of the distance, the inclination of the piston disc-shaped head 566 towards the shaft 246 of the driving surface, in order to prevent the cutting device 294 with respect to the auxiliary support shaft 246 mobile.

See Figure 12, the inclined support member 298 around the positioned in the vertical position and the horizontal 45° bevel position of the oblique angle between the axis 242 to pivot movement freedom, in the vertical position, cutting device 294 is a vertical orientation, is used for conventional miter saw cutting of the work piece, the 45° bevel position, cutting device 294 from the vertical line into a 45° angle. A spring 358 and the spring clip 362 of moving freely, that is, the 0 ° (vertical) position and the 45° between the position 'floating' , the fundamental will not help or hinder support member around the bevel axis 242 motion. As shown in Figure 10, when the cutting device 294 is in a vertical position, the spring clip 362 slices of 374 and the screw 534 is jointed, in order to prevent spring 358 around the bevel axis 242 produce any additional counterclockwise rotation (Figure 10 shown). The: screw 534, the spring clip 362 and spring 358 to provide forced power-assisted, subjected to a spring 358 of the torsional force, and the cutting device 294 the rotating force of the opposite (i.e. more than the perpendicular line to a negative bevel angle position (Figure 12 to the left in)). Cutting device 294 is further artificially around the bevel axis 242 adjustment, and exceeding the vertical position, and the spring 358 relative to the rotating force, in this way, the spring clip 362 in relation to the inclined support member 298 position 'N' (as shown in Figure 12 is shown by a dashed line in), at this time, the lead screw 534 B along the direction of the arrow to the spring clip 362 spring 374, and with the spring 358 opposite the deflecting force. Cutting device 294 adjustable to more than vertical axis, can only be transferred to the spring 358 effectively within the range permitted by the pressure. In this point, the spring 358 is compressed between the spring clip 362 arm 366 and 354 between the right side wall. On the drawings in the embodiment shown, this kind of situation deviate from the vertical axis about -3 ° position.

Similarly, as shown in Figure 12, when the cutting device 294 is in the 45° bevel position, the spring clip 362 of the spring 374 engages the lead screw, in order to prevent the spring 358 around the bevel axis 242 produce any additional clockwise rotation (Figure 12 transfer to the right). In this position, screw 538, the spring clip 362 and the spring 358 to provide forced resistance, confrontation cutting device 294 rotation, more than 45° bevel position. Cutting device 294 also is further manually adjust more than 45° bevel position, and the spring 358 relative to a catalyst, cutting device be adjusted to deviate from the vertical position about 48° position. In this position, the direction of the lead screw along the arrow C pairs of spring clips 362 spring 374 exerts pressure, and with the spring 358 relative to the deflecting force, in this way, the spring clip 362 relative to the inclined support member 298 in position '0' (as shown in Figure 12 is shown by a dashed line). Cutting device 294 can be adjusted to deviate from the vertical axis more than 45° position, as long as the spring 358 of the permitted range of effective compressive force. In this point, the spring is compressed in the spring clip 362 of the arm 370 and opening 354 between the left side wall.

As shown in Figure 1 the most clearly shown, sliding compound miter saw 10 also includes a saw bracket 578, it has a half-and-half housing 582 and 586, and includes a hinge portion 590, the hinged part 590 consecutive interlinked rows for 594 is connected to the U-shaped clamp 414 and 418 between. U.S. 5,265,511 Patent described and shown a similar consecutive interlinked rows and fixing device, in this incorporated for reference herein. Consecutive interlinked rows 594 has axial lead 598, saw bracket 578 can be around the is in the cutting position and [...] is hinged between the position of bolt axis 598 as is pivotally moved. The hinged bolt 594 with two fasteners (not shown) is fixed to the saw support bracket 578 is, a pair of disc spring (also not shown) is positioned on the consecutive interlinked rows 594 and U-shaped clamp 414 between. The relative [...] of the coil spring, a cover board 598 (Figure 6 shown) the hinged bolt 594 is pressed into a predetermined position.

Longer igur 1, saw bracket 578 which comprises a saw motor 602, which comprises axial with spindle 610 spindle 606. The motor 602 caused by powering of spindle 606 around the mandrel axis 610 to rotate. Saw blade 614 is fixed to the shaft 606 on, for rotation with the drive shaft, two chamber-forming blade protective device 618, in order to cover the saw blade 614 of the upper half part.

Saw bracket 578 also comprises a lower blade guard device 622 and one is connected to the lower blade guard device 622 on the connecting rod, is used for the lower blade guard device 622 from the cutting device 294 [...] when in position around the position of the saw blade moves to the cutting device 294 when in the cutting position at the saw blade non-rounded position (expose the saw blade 614 for cutting). U.S. 5,370,025 Patent described and shown a preferred embodiment of the lower blade guard device, in the incorporated for reference.

See Figure 17-19, the connecting rod includes a cam driven wheel support member 626, which is provided with a is connected to the U-shaped clip 418 one end 630 and is used for supporting the cam driven wheel 638 the opposite end 634. The connecting rod also includes a cam plate 642, in consecutive interlinked rows 584 is pivot connected to the half-and-half housing 582 on. Cam plate 642 includes a cam surface 646, a lost motion that is, separation surfaces with an end a 650 and 658 connecting arm 654. The connecting rod also includes a connector 662, connector 662 with pivot is connected to the connecting arm 654 end 658 one end of on 666 and with the shaft axis with the mandrel 610 eccentric at the point of its pivot is connected to the lower blade guard device 622 the opposite end of the the 670. Torsion spring 674 is connected to the half-and-half housing 582 and cam plate 642 between, in order to continuously bias the lower blade guard device 622 towards the encircling position, in this position, the lower blade guard device 622 around the saw blade 614 the lower half part.

Cutting device 294 includes a pair of spiral spring 678 (Figure 17 with the dotted line only one of them is shown), each spiral spring 678 are provided with the inclined support member 298 is connected with one end of the other end of the relatively 682 and 686. A support bar 690 half-and-half of the bracket of the saw housing 582 and 586 extends between the, spiral spring 678 end 686 is connected to the supporting bar 690 on. Spiral spring 678 to provide bias pressure, is used for the saw bracket 578 a bias voltage to the non-cutting position.

See Figure 6 and 9, saw bracket 578 U-shaped clip also includes the 414 adjacent elongate portion 694, as shown in Figure 9 the most clearly indicate, elongate portion 694 has a central positioning of the sailing speed member 698, and includes a part fixed on the sailing speed 698 internal hexagonal nut. With the lead screw 708 the cover 706 is fixed on the elongate portion 694 is, in order to cover the sailing speed member 698 and the nut 702, and the nut 702 positioned in the sailing speed member 698 within. With a set of in its [...] the depth adjusting nut 714 tap screw nut 702 inner, in this way, when the cutting device 294 to the cutting position, screw 710 end 718 and the U-shaped clamp 414 is jointed, in order to restrain the saw bracket 578 downward movement of the saw blade and 614 cut into the work piece and through the cut-out plate 70 depth.

Sliding compound miter saw 10 also includes a extends through the U-shaped clamp 414 locking fasteners 722. Locking bolts 722 from the allow saw bracket 578 to move freely around the withdrawal of the bolt is moved to the position of the saw bracket 578 is fixed in the cutting position is used for transmitting the sliding composite conical saw 10 locking position.

In the course of running, locking bolts 722 exiting the release position, so that the saw bracket 578 is to [...] position, the screw rod 710 and depth adjusting nut 714 is adjusted to the appropriate cutting depth, with protecting piece 74 relative to, the workpiece (not shown) is placed on the workpiece supporting surface.

When the saw blade 614 when necessary for replacing as a special application, the lower blade guard device 622 artificially rotated to non-rounded position, the cutting device 294 is still in on [...] position. This will cause cam driven wheel 638 and lost motion surface 650 engagement, so as to prevent saw support bracket 578 to move downwards, at the same time, the lower blade guard device 622 is in a non-rounded position. When the saw blade at the end of the replacement, release the lower blade guard device 622, and the spring 674 to pivot under bias force around the return position.

If the need to change the cone angle (i.e. turntable 58 is correspondent to the support 18 around the axis 60 of the rotating position), the pull rod 134 end 138 upward, in order to overcome the spring 90 and the biasing force of the pawl 106 from the support 18 of the peninsula edge 34 away from the surface of. Furthermore, the rotating platform 58 free, around the axis 60 is pivotally moved to any desired adjusted position on. In particular, to note, when the need for the turret 58 located in the pawl receiving recess 42 of one of the predetermined adjustment position, it will push peninsula 82, is used for positioning a turntable 58, so that the pawl 106 is in a substantially close to the desired pawl receiving groove 42 is, and to loosen tie rod 134, the pawl 106 reaches the pawl receiving groove 42 is idle. As long as the pawl 106 at least more than the pawl receiving groove 42 with one of the edges, the deflection of the spring pressure will actuate the pawl 106 fully enter into the groove 42, and to the turntable 58 exerts positioning force, reaches a predetermined position. The need to send the [...] to apart from any predetermined position outside the position, then to the screw 218 to the supporting rod 190 tighten, in order to make the friction extending part 178 towards the support surface 46 pressing, the pull rod 134 before being released, the turret 58 relative to the support 18 locking in place.

When the need of the work piece only when the conventional miter saw cutting, according to Figure 1 the cutting device shown in 294 positioning, in this way, cutting device 294 is in a vertical position, in this position, when required, can be rotated by a handle 518, from the auxiliary support member 434 release inclined support member 298, in order to adjust the cutting device 294 and exceeding the vertical axis, is located in the vertical axis and -3 ° bevel position of the position of the between. When the saw is in the proper position, such as oblique angle indicator the axial line shown (not shown), can be tighten the handle 518, in order to the housing and the cutting device 294 fixed on a correct position. When the release handle 518 time, that is, when in the tumbled position, deflection of the spring under the effect of pressure, cutting device 294 will return to the vertical position, can then be in the vertical position and the 45° bevel position of adjustment between the cutting device 294, in order to carry on the composite conical saw cutting of the work piece.

When the need for greater than 45° angle, the vertical axis of the deviated from 45 °-48 ° cutting angle of the work piece, is to firstly the workpiece according to the 45° bevel position, and then near the spring 358 pressure of deflection of the pressing of the work piece to the desired angle position. When the reach the required position, can be tighten the handle 518, in order to the inclined support member 298 with respect to the auxiliary shaft support element 434 are fixed, so that the cutting device 294 is fixed in the correct angle position. When the once again release handle 518 time, the deflection of the spring under the effect of pressure, cutting device 294 will return to 45° bevel position, cutting device 294 is free to again in the 45° bevel position and the vertical axis of the adjustment between the positions.

Adoptability bracket 578 in order to cut the work piece for lowering, cam driven wheel 638 along the cam surface 646 mobile, causing cam plate 642 around the pivot axis and the spring line 674 to the deflection of the pivotal movement relative to the pressure. Cam plate 642 caused by moving the pivot of the lower blade guard device 622 around the mandrel axis 610 to rotate, in this way, the lower blade guard device 622 within retract into the outer casing, surrounded by the saw blade to the saw blade non-cutting position of the position.

Various features of the present invention included in the following claims.