CN105904273A - Overload protection mechanism applied to multi-axis numerical control machine tool - Google Patents

Abstract

The invention discloses an overload protection mechanism applied to a multi-axis numerical control machine tool. The overload protection mechanism comprises a first gear, a second gear and a driven friction disc, wherein the first gear and the second gear are engaged with each other and arranged in a paired manner, and the driven friction disc is fixed to the first gear and is concentric with the first gear. A driving shaft is movably sleeved with the first gear through a bearing. The driving shaft is provided with an outer thread and connected with a screw nut through the outer thread in a threaded manner. The screw nut is fixedly connected with a baffle ring. The driving shaft is further sleeved with a driving friction disc matched with the driven friction disc. The driving shaft is provided with friction keyways formed in the axial direction of the driving shaft. The driving friction disc is matched with the friction keyways through keys so that the driving friction disc can move in the axis direction relative to the driving shaft. The driven friction disc is provided with friction protrusions/friction grooves. The driving friction disc is provided with friction grooves/friction protrusions matched with the driven friction disc. A first spring is mounted between the baffle ring and the driving friction disc.

Description

It is applied to the overload protecting mechanism of multi-axis NC Machine Tools

Technical field

The present invention relates to Machining Technology field.

Background technology

Machine tool technology of the prior art is ripe, and machining accuracy is high, can realize the functions such as car, milling, boring, brill, it can however not effectively car, plane are combined；The cutter holding mechanism of three axle lathes of the prior art is typically fixed, it is impossible to controls cutter and moves in the axial direction, thus limits machining area.

Summary of the invention

It is an object of the invention to provide a kind of high accuracy machining tool, by clamped one time, can complete car, milling, boring, bore, the function such as plane, and the axis direction motion of cutter can be controlled, thus improve machining area.

For realizing above-mentioned technical purpose, the technical solution adopted in the present invention is as follows.

nullIt is applied to the overload protecting mechanism of multi-axis NC Machine Tools，It includes a pair intermeshing first gear、Second gear，Fix with the first gear and the driven friction disk of arranged concentric，First gear is by bearing and driving shaft pivot bush unit，It is provided with external screw thread on driving shaft and is threadeded with screw by external screw thread，Screw is fixing with baffle ring to be connected，The active friction disk matched with driven friction disk also it is socketed with on driving shaft，It is provided with on driving shaft along the axial arranged friction keyway of driving shaft，Active friction disk is by strong mating so that active friction disk can be relative to the displacement of driving shaft generation axis direction with the keyway that rubs，Friction protrusion/friction groove it is provided with on driven friction disk，Friction groove/the friction protrusion matched with driven friction disk it is provided with on active friction disk，The first spring it is also equipped with between baffle ring and active friction disk；Above-mentioned driving shaft is connected by the first drive mechanism and the first driving means, and driving shaft is connected to the outfan of the first drive mechanism, and the first driving means is connected to the drive end of the first drive mechanism.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention, the accompanying drawing used required in embodiment will be done simple introduction below, apparently, accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the structural representation of the present invention.

Fig. 2 is the structural representation of the present invention.

Fig. 3 is the structural scheme of mechanism of the present invention.

Fig. 4 is the overload protecting mechanism structural representation of the present invention.

Fig. 5 is the overload protecting mechanism structural representation of the present invention.

Fig. 6 is the frictional disk structural representation of the overload protecting mechanism of the present invention.

Fig. 7 is the locking mechanism structure schematic diagram of the present invention.

Fig. 8 is the locking mechanism structure schematic diagram of the present invention.

Fig. 9 is the locking mechanism structure schematic diagram of the present invention.

Figure 10 is double-power mechanism and the cutter holding mechanism attachment structure schematic diagram of the present invention.

Figure 11 is the double-power mechanism structural representation of the present invention.

Figure 12 is the double-power mechanism structural representation of the present invention.

Figure 13 is the double-power mechanism structural representation of the present invention.

Figure 14 is the double-power mechanism structural representation of the present invention.

Figure 15 is the cutter holding mechanism structure schematic diagram of the present invention.

Figure 16 is workpiece grip mechanism and the Z axis guide rail connection structure schematic diagram of the present invention.

Figure 17 is the first slip plate body structural representation of the present invention.

Figure 18 is the central rotational plate body structural representation of the present invention.

Figure 19 is the second sliding panel attachment structure schematic diagram of the present invention.

Figure 20 is the 3rd slip plate body and the workpiece grip mechanism attachment structure schematic diagram of the present invention.

Figure 21 is the structural representation of the Z axis rotating mechanism of the present invention.

Figure 22 is the structural representation of the Z axis rotating mechanism of the present invention.

Figure 23 is the structural representation of the Z axis rotating mechanism of the present invention.

Figure 24 is the structural representation of the Z axis rotating mechanism of the present invention.

Figure 25 is the structural representation of the Z axis rotating mechanism of the present invention.

Figure 26 is the structural representation of the Z axis rotating mechanism of the present invention.

Figure 27 is the workpiece grip mechanism structural representation of the present invention.

Figure 28 is the workpiece grip mechanism structural representation of the present invention.

Figure 29 is the dog plate structural representation of the present invention.

Figure 30 is the chuck body structural representation of the present invention.

Figure 31 is the bevel gear wheel structural representation of the present invention.

Figure 32 is double-power mechanism and the range controlling mechanism attachment structure schematic diagram of the present invention.

Figure 33 is the range controlling mechanism structural representation of the present invention.

Figure 34 is the stroke slider structural representation of the present invention.

Figure is denoted as:

100, frame；110, controller；120, Z-axis direction guide rail.

210, motor；220, driving shaft；222, external screw thread；230, the first gear；240, driven friction disk；250, active friction disk；260, baffle ring；262, the first spring；264, screw；270, the second gear.

310, displacement locking plate；320, fixing locking plate；330, slide block；340, the second spring；350, shift fork；352, shift fork prong；360, rotating shaft is stirred；370, stick；380, turn trough is stirred.

400, double-power mechanism；402, the first gathering sill；410, the first main shaft；420, housing is connected；422, the 3rd gear；424, the 4th gear；430, the second main shaft；440, output shaft；442, the second gathering sill；444, end recesses；450, displacement block；451, lobe；452, step；453, extenal fixation ring；454, bearing；455, interior retainer ring；460, range controlling mechanism；461, locating piece；462, stroke guide post；463, scale；464, stroke slider；465, travel switch；466, stroke retaining mechanism；467, pointer.

500, cutter holding mechanism；510, scroll chuck；520, disk body is connected；530, guide pillar is connected；540, chip-removal hole.

600, motion bracket；610, the first slip plate body；612, dials；614, groove is turned to；616, corner scale；617, central rotational plate body；618, corner pointer；619, rotation lock hole；620, the second slip plate body；622, stand；630, the 3rd slip plate body；632, hole slot is connected；634, Y-axis slide block.

700, workpiece grip mechanism；710, chuck body；712, radial groove；714, hole is pulled；720, dog plate；722, radially draw-in groove；724, clamping locking hole；726, chuck guide pad；730, bevel gear wheel；732, planar spiral groove；734, ring-shaped step；740, base plate；750, bevel pinion.

800, Z axis rotating mechanism；810, Z-axis direction rotating shaft；812, the first outside keyway；820, positioning ring；822, poke rod；824, arc guide groove；826, the 3rd spring；830, connection block；832, guide pad；840, movable rotational piece；842, convex annular goes out step；844, the second internal keyway；850, linkage rotation part；852, the second outside keyway；854, loop pulling groove；856, the first internal keyway；860, the traction collar；862, the first subring；864, the second subring.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art under not making creative work premise, the every other embodiment obtained, broadly fall into scope.

As shown in Figure 1, 2, 3, a kind of high accuracy gang tool, it includes frame 100, the controller 110 being installed on frame 100, is installed on the double-power mechanism 400 of frame 100 one end, is installed on the motion bracket 600 of frame 100 other end, is installed on the cutter holding mechanism 500 of double-power mechanism 400 outfan, is installed on the workpiece grip mechanism 700 of motion bracket 600.

Controller can be used for controlling the work of double-power mechanism, it is also possible to controls the movement of motion bracket.

As shown in Figure 1, 2, 3, the present invention provides the embodiment of cutter holding mechanism center shaft line and workpiece grip mechanism centerline axis parallel in detail；Cutter holding mechanism center shaft line in the present invention can also be arranged vertically with workpiece grip mechanism central axis vertical direction, specifically, and the central axis vertical direction layout of workpiece grip mechanism and the central axis upright with cutter holding mechanism；Cutter holding mechanism center shaft line in the present invention can also be arranged vertically with workpiece grip mechanism central axis horizontal direction, specifically, and the central axis horizontal direction layout of workpiece grip mechanism and the central axis upright with cutter holding mechanism.Cutter holding mechanism and the three of workpiece grip mechanism kinds of different arrangements, all can realize car, milling, boring, bore, the function such as plane.

The present invention is described in detail in the way of workpiece grip mechanism centerline axis parallel layout by cutter holding mechanism center shaft line.

As shown in figures 10-14, double-power mechanism 400, it includes sleeve, the connection housing 420 being connected is fixed with sleeve, the second main shaft 430 being socketed in sleeve, output shaft 440, it is provided with a pair intermeshing 3rd gear 422 in connecting housing 420, 4th gear 424, second main shaft 430 is for being socketed with displaced block body 450 outside screw mandrel and the second main shaft 430, displacement block 450 is connected by screw and the second main shaft 430, displacement block is by the first guiding mechanism and sleeve connection, the guide direction of the first guiding mechanism is identical with the length direction of sleeve, displacement block 450 is connected with the movement parts of the first guiding mechanism；Preferably, first guiding mechanism includes being arranged at sleeve the first gathering sill 402 extended along its axis direction, is arranged at displacement block the lobe 451 matched with the first gathering sill 402, by rotating the second main shaft, due to lobe 451 and the matching relationship of the first gathering sill 402 so that displacement block 450 moves along the axis direction of the second main shaft 430；The annular step 452 of concentric layout it is provided with on displacement block 450, output shaft 440 is socketed on outside and output shaft 440 the drive end of the second main shaft 430 and is provided with end recesses 444, end recesses 444 is connected with annular step 452 by bearing 454, being provided with the second gathering sill 442 extended along its axis direction on output shaft 440, the 4th gear 424 is socketed on the outside of output shaft 440 by strong mating with the second gathering sill 442；When under the 4th gear 424 not rotation situation, the rotation of the second main shaft is driven by the second driving means, both displacement block can have been driven to move back and forth along the axis direction of the second main shaft, owing to the end recesses of output shaft is connected to the outer ring of bearing 454, and the inner ring of this bearing 454 is connected to annular step 452, and under the strong matching effect with the second gathering sill so that output shaft 440 can only move along its axis direction；3rd gear 422 is socketed on the outside of the first main shaft 410, by the rotation of the first driving means drive shaft 410, and by the 3rd gear and the transmission of the 4th gear, output shaft 440 both can have been driven around own axis.

As shown in figure 14, the outside of above-mentioned annular step 452 is socketed with extenal fixation ring 453, bearing 454, interior retainer ring 455 the most successively, the diameter of extenal fixation ring 453 is more than the race diameter of bearing 454, the diameter of interior retainer ring 455 inner ring diameter more than bearing 454 race diameter less than bearing 454, end recesses is socketed on bearing 454, interior retainer ring 455 outside, interior retainer ring 455 is fixed with annular step 452 by screw, and extenal fixation ring 453 is fixed by the drive end of screw with output shaft 440；By extenal fixation ring 453, the fixing and restriction effect of interior retainer ring 455 so that end recesses fits tightly with bearing 454.

nullAs shown in figs. 3-9，The drive end of the first main shaft 410 connects retaining mechanism，Retaining mechanism includes the second gear 270 being socketed on the first main shaft 410、It is fixedly sheathed in the displacement locking plate 310 of the first main shaft 410、It is socketed on the first main shaft 410 the fixing locking plate 320 fixed with frame 100，It is provided with, on first main shaft 410, the axial keyway arranged along its axis direction，Second gear 270 by strong mate with axial keyway also pivot bush unit outside the first main shaft 410，It is provided with lock projection on displacement locking plate 310，It is provided with, on fixing locking plate 320, the locking groove matched with lock projection，The annular being provided with concentric layout on displacement locking plate 310 stirs groove，Between displacement locking plate 310 and the second gear 270, the second spring 340 being socketed on the first main shaft 410 is installed，Preferably，The ring that is locked between displacement locking plate and the second gear it is further fixed on first output shaft 410，Displacement locking plate and be locked between ring and be provided with the second spring 340，By setting up the ring that is locked，The second spring 340 is avoided to contact with the direct of the second gear，Can avoid spring that the second gear is applied active force，Improve the precision of this device.

As shown in Fig. 4,7,8,9, displacement locking plate 310 is also associated with toggle mechanism, the active force applied by toggle mechanism so that displacement locking plate 310 overcomes the elastic force of the second spring 340 and along the axially-movable of the first main shaft 410, so that displacement locking plate 310 departs from fixing locking plate 320；When the second gear 270 rotates, the rotation of the first main shaft 410 can be driven.

Above-mentioned toggle mechanism includes slide block 330, shift fork 350, slide block 330 is connected with frame 100 by the second guiding mechanism, the guide direction of the second guiding mechanism is parallel with the axis direction of the first main shaft 410, and slide block 330 is connected with the movement parts of the second guiding mechanism；As shown in Figure 8, preferably, what the second guiding mechanism included fixing with frame 100 and be parallel to the first main shaft stirs guide post, slide block 330 is matched with stirring guide post by sliding sleeve or linear bearing, what the annular being provided with on slide block 330 and shift on locking plate stirred groove match stirs fork, preferably, this stirs fork is U-shaped fork；nullSlide block 330 is flexibly connected with shift fork 350，Shift fork 350 drives slide block 330 to move back and forth along the axis direction stirring guide post，Preferably，The axis direction being provided with reversed column and reversed column on slide block 330 is vertical with the axis direction stirring guide post，The outfan of shift fork 350 is provided with the shift fork prong 352 matched with reversed column，Preferably，This shift fork prong 352 is U-shaped fork，The centre position of shift fork 350 is provided with stirs rotating shaft 360，With stirring of fixing of frame 100 be provided with on control panel with stir that rotating shaft 360 matches stir turn trough 380，The drive end riveting of shift fork 350 has stick 370，Stir be provided with on control panel guide that action bars 370 drives slide block 330 axially-movable stir gathering sill，Preferably，Stir and be additionally provided with fixing displacement locking plate 310 on gathering sill and be in the groove under released state.

nullAs shown in fig. 3 to 7，It is also equipped with overload protecting mechanism between second gear 270 and the first driving means，Can effectively protect the transmission parts in this device，Described overload protecting mechanism includes the first gear 230 being meshed with the second gear 270，Fix with the first gear 230 and the driven friction disk 240 of arranged concentric，First gear 230 is by bearing and driving shaft 220 pivot bush unit，It is provided with external screw thread 222 on driving shaft 220 and is threadeded with screw 264 by external screw thread 222，Screw 264 is fixing with baffle ring 260 to be connected，The active friction disk 250 matched with driven friction disk 240 also it is socketed with on driving shaft 220，It is provided with on driving shaft 220 along the axial arranged friction keyway of driving shaft 220，Active friction disk 250 is by strong mating so that active friction disk 250 can be relative to the displacement of driving shaft generation axis direction with the keyway that rubs，Friction protrusion/friction groove it is provided with on driven friction disk 240，Friction groove/the friction protrusion matched with driven friction disk it is provided with on active friction disk 250，The first spring 262 it is also equipped with between baffle ring 260 and active friction disk 250；Owing to the position of the first gear 230 is fixed, by rotating screw 264, the elastic force of adjustable the first spring 262, thus control the frictional resistance between active friction disk and driven friction disk；When driving shaft 220 rotates under the driving of kinetic energy, mate so that active friction disk 250 rotates by strong with the keyway that rubs, under the elastic force effect of the first spring 262, active friction disk 250 is contacted with driven friction disk 240 closely, thus drive driven friction disk, the rotation of the first gear, thus realize normal delivery and the output of kinetic energy；When the first main shaft 410 is stuck or the over loading of other mechanisms, and when driving shaft 220 rotates, active friction disk skids with driven friction disk, it is impossible to normally to the first gear input kinetic energy, thus protect the safety of mechanism.

Above-mentioned driving shaft 220 is connected by the first drive mechanism and the first driving means, and driving shaft is connected to the outfan of the first drive mechanism, and the first driving means is connected to the drive end of the first drive mechanism；As shown in Figure 3,4, the drive end of driving shaft connects motor 210 by synchronous belt drive mechanism, provides kinetic energy by motor and transmits kinetic energy by synchronous belt drive mechanism, thus driving the rotation of driving shaft 220.

nullAs illustrated in figs. 16-19，When numerical control programming in order to describe the motion of lathe，Simplify the method for programming and ensure the interchangeability of record data，With machine origin O as coordinate origin and follow right-handed Cartesian rectangular coordinate system set up by X、Y、The fixing rectangular coordinate system of Z axis composition，Under original state，Motion bracket 600 can drive workpiece grip mechanism along X、Y、Z-motion and around Z axis、Y-axis rotates，So that held workpiece can complete multi-faceted processing，Described motion bracket 600 includes the first slip plate body 610、Second slip plate body 620、3rd slip plate body 630，First slip plate body 610 passes through nut and is installed on frame and arranges along Z axis axis direction and can be connected around the Z-axis direction screw mandrel of own axis，First slip plate body 610 is connected with frame 100 also by the 3rd guiding mechanism，The guide direction of the 3rd guiding mechanism extends along Z axis axis direction，First slip plate body 610 is fixing with the movement parts in the 3rd guiding mechanism to be connected；nullFirst slip plate body 610 is connected by central rotational plate body 617 with the second slip plate body 620，It is provided with circular ring type dials 612 on first slip plate body 610，The center position of dials 612 is provided with and turns to groove 614，Corner scale 616 it is additionally provided with on the table top of dials 612，The center of central rotational plate body 617 is provided with and turns to what groove 614 matched to turn to projection，By turn to protruding with turn to groove 614 be mutually matched and realize the rotation around Y-axis of the central rotational plate body，The corner pointer 618 pointing to corner scale it is provided with on central rotational plate body，Be provided with on central rotational plate body along X-axis axis direction arrange and can be around the X axis screw mandrel of own axis，Second slip plate body 620 is connected with X-axis filament bar by screw，Central rotational plate body is connected by the 4th guiding mechanism and the second slip plate body 620，The guide direction of the 4th guiding mechanism extends along the axis direction of X-axis，Second slip plate body 620 is fixing with the movement parts of the 4th guiding mechanism to be connected，Rotation lock hole 619 and the second spanner matched with rotation lock hole 619 it is provided with on central rotational plate body 617，By rotating the second spanner, central rotational plate body and the first slip plate body are locked and fixed；The stand 622 that vertical direction (i.e. along Y direction) is arranged it is provided with on second slip plate body 620, be provided with in stand 622 along Y-axis axis direction arrange and can be around the Y-axis screw mandrel of own axis, 3rd slip plate body 630 is connected with Y-axis screw mandrel by screw, stand 622 is connected by the 5th guiding mechanism and the 3rd slip plate body 630, the guide direction of the 5th guiding mechanism extends along the axis direction of Y-axis, and the 3rd slip plate body 630 is fixing with the movement parts of the 5th guiding mechanism to be connected；Workpiece grip mechanism 700 is installed on the 3rd slip plate body 630.

The 3rd above-mentioned guiding mechanism includes being installed on frame 100 and the Z-axis direction guide rail arranged along Z axis axis direction or Z-axis direction guide rod 120, and the movement parts of the 3rd guiding mechanism is the Z-axis direction slide block or sliding sleeve matched with Z-axis direction guide rail or Z-axis direction guide rod.

The 4th above-mentioned guiding mechanism includes being arranged at central rotational plate body and the X axis guide rail arranged along X-axis axis direction or X axis guide rod, and the movement parts of the 4th guiding mechanism is the X axis slide block or sliding sleeve matched with X axis guide rail or X-axis line guide rod.

The 5th above-mentioned guiding mechanism includes being arranged at stand 622 and the Y-axis guide rail extended along Y-axis axis direction or Y-axis guide rod, and the movement parts of the 5th guiding mechanism is the Y-axis slide block or sliding sleeve matched with Y-axis guide rail or Y-axis guide rod.

nullAs shown in Figure 19-24，Workpiece grip mechanism 700 includes being flexibly connected with the 3rd slip plate body 630 and can be around the base plate 740 of own axis、It is flexibly connected with base plate 740 and can be around the bevel gear wheel 730 of own axis、Several bevel pinions 750 matched with bevel gear wheel 730 are installed on base plate 740、It is socketed on base plate 740、Bevel gear wheel 730 outside the chuck body 710 fixed with base plate、Dog plate 720 with four same sizes that chuck body 710 is slidably connected，Base plate 740 is installed between bevel gear wheel 730 and the 3rd slip plate body 630，The central angle of dog plate 720 is 90 degree and four dog plates can be spliced into a complete circle，Connection hole slot 632 it is provided with on 3rd slip plate body 630，Concentric layout and the ring-shaped step 734 being connected with base plate 740 center it is provided with on bevel gear wheel，The other end at 740 centers, bottom is also associated with Z-axis direction rotating shaft 810，The back side of bevel gear wheel is provided with planar spiral groove 732，Four radial grooves 712 being radially distributed it are provided with on chuck body 710，The back side of dog plate 720 is provided with the chuck guide pad 726 matched with radial groove 712，The spiral salient matched with planar spiral groove it is provided with on chuck guide pad 726，The drive end of bevel pinion is provided with rotation hole，The wall portion of chuck body is provided with the through hole matched with rotation hole.

By driving spanner to drive the rotation of bevel pinion, the rotation of bevel gear wheel can be driven, due to chuck guide pad and the planar spiral groove matching relationship being arranged at bevel gear wheel, so that four dog plates occur the deviation synchronized or gather.

The advantage using four dog plates is: four dog plates occur the deviation synchronized or gather, it is more convenient for gripping rods parts, particularly clamp U-shaped rod-like members, workpiece grip mechanism of the prior art, poor to the clamping effect of U-shaped rod-like members, clamped one time can not be realized, complete the two ends processing of U-shaped tubular part.

Such as Figure 20, shown in 21, on dog plate 720, front is additionally provided with the radial direction draw-in groove 722 being radially distributed, and dog plate 720 is additionally provided with the clamping locking hole 724 being positioned at radially draw-in groove 722 both sides；Other auxiliary clamps can be easily installed by radial direction draw-in groove 722, and locked by clamping locking hole 724 so that clamping is more stable and is applicable to the clamping workpiece of various shapes.

As shown in figure 15, cutter holding mechanism 500, it includes that fix with the outfan of output shaft 440 connects disk body 520 and be connected the scroll chuck 510 that disk body 520 is connected, connect disk body 520 to be connected with output shaft 440 by screw, connect disk body 520 and fix with being connected scroll chuck 510 by being socketed with the connection guide pillar 530 of screw.

The center position of scroll chuck is additionally provided with chip-removal hole 540, it is simple to chip is got rid of.

The technology maturation of scroll chuck of the prior art, and multiple functional, the structure of scroll chuck is no longer repeated by the present invention.

As Fig. 1-3,10, shown in 25-27, range controlling mechanism 460 is there also is provided in double-power mechanism 400, range controlling mechanism 460 includes laying respectively at two stroke slider 464 at displacement block two ends, the 6th guiding mechanism that guide direction is consistent with the axis direction of output shaft 440, and stroke slider 464 is connected with the movement parts of the 6th guiding mechanism；Travel switch 465 is installed in stroke slider 464.

The 6th above-mentioned guiding mechanism include two axis directions stroke guide post 462 parallel with output shaft axis direction, be fixed on the locating piece 461 at two stroke guide post 462 two ends, stroke slider 464 is slidably connected with stroke guide post 462 by sliding sleeve or linear bearing, stroke retaining mechanism 466 for fixed journey system slide position is installed in stroke slider 464, the trip retaining mechanism 466 is preferably knob, by rotary knob thus stroke slider is fixed with stroke guide post.

It is further fixed on scale 463 between two above-mentioned locating pieces 461, stroke slider 464 is additionally provided with the pointer 467 pointing to scale 463.

By stirring two stroke slider, thus control to shift the stroke range of block, it is to avoid because the stroke of displacement block is excessive or too small, the axis direction range of movement causing output shaft is impacted；By the control action of range controlling mechanism 460, that can improve improves the precision produced, and prevents the stroke shifting block excessive, cause the collision between mechanism, it is ensured that the safety of device.

As shown in Figure 20-26, the 3rd slip plate body 630 is provided with Z axis and rotates plate body 800, rotate plate body 800 by Z axis and workpiece grip mechanism 700 can be driven to deflect around Z axis generation certain angle, thus realize multi-angle processing；Z axis rotating mechanism 800 includes the shell body that Z-axis direction rotating shaft 810 fixes with the 3rd slip plate body 630, it is slidably socketed in Z-axis direction rotating shaft 810 can be around the positioning ring 820 of own axis, movable rotational piece 840, movable rotational piece 840 is connected with motor by the 3rd drive mechanism, and movable rotational piece 840 is connected to the driven member of the 3rd drive mechanism；Due to being slidably socketed of movable rotational piece and Z-axis direction rotating shaft, when drive stepping motor, by the transmission of the 3rd drive mechanism, movable rotational piece can be realized and dally around own axes；nullThe convex annular being additionally provided with concentric layout on movable rotational piece 840 goes out step 842，Convex annular goes out to be provided with the second internal keyway 844 on the inwall of step 842，The first outside keyway 812 it is provided with in Z-axis direction rotating shaft 810，Z-axis direction rotating shaft 810 slide outside is socketed with the linkage rotation part 850 that can move relative to Z-axis direction rotating shaft generation axis direction，The first internal keyway 856 matched with the first outside keyway 812 it is provided with at the inwall of linkage rotation part 850，The second outside keyway 852 matched with the second internal keyway 844 it is provided with at the outer wall of linkage rotation part 850，The loop pulling groove 854 of concentric layout it is provided with on linkage rotation part 850，Linkage rotation part 850 is connected with the traction collar 860 by loop pulling groove 854，It is provided with, on the traction collar 860, the connection block 830 that a pair level is put，The guide pad 832 of Z-axis direction shaft axis it is provided perpendicular in connection block 830，Shell body is socketed on positioning ring 820、The outside of connection block 830，The interior gathering sill moved for guide connecting block body 830 it is provided with along Z-axis direction shaft axis direction in shell body，It is provided with on positioning ring 820 and matches and guide the arc guide groove 824 that guide pad shifts in Z-axis direction shaft axis direction with guide pad 832，The 3rd spring 826 it is socketed with outside Z-axis direction rotating shaft 810，3rd spring 826 one end connecting positioning sleeve ring 820，The inner wall part of other end connected with outer casing body.

The above-mentioned traction collar 860 is made up of with the second subring 864 splicing the first subring 862, first subring 862 is fixed by screw with the second subring, so that draw, the collar is more convenient to be installed in loop pulling groove 854, a pair guide pad 830 fixing connection the first subring and/or the second subring.

Above-mentioned movable rotational piece is connected with Z-axis direction rotating shaft 810 by bearing, and movable rotational piece is connected to the outer ring of this bearing, and Z-axis direction rotating shaft is connected to the inner ring of this bearing；So that movable rotational piece can dally relative to Z-axis direction rotating shaft.

The 3rd above-mentioned drive mechanism is synchronous belt drive mechanism.

Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention；Multiple amendment to these embodiments will be apparent from for those skilled in the art, and the General Principle defined in the present invention can realize in the case of without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will not be defined to the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and features of novelty.

Claims (1)

1. null1. it is applied to the overload protecting mechanism of multi-axis NC Machine Tools，It is characterized in that: it includes a pair intermeshing first gear、Second gear，Fix with the first gear and the driven friction disk of arranged concentric，First gear is by bearing and driving shaft pivot bush unit，It is provided with external screw thread on driving shaft and is threadeded with screw by external screw thread，Screw is fixing with baffle ring to be connected，The active friction disk matched with driven friction disk also it is socketed with on driving shaft，It is provided with on driving shaft along the axial arranged friction keyway of driving shaft，Active friction disk is by strong mating so that active friction disk can be relative to the displacement of driving shaft generation axis direction with the keyway that rubs，Friction protrusion/friction groove it is provided with on driven friction disk，Friction groove/the friction protrusion matched with driven friction disk it is provided with on active friction disk，The first spring it is also equipped with between baffle ring and active friction disk；Above-mentioned driving shaft is connected by the first drive mechanism and the first driving means, and driving shaft is connected to the outfan of the first drive mechanism, and the first driving means is connected to the drive end of the first drive mechanism.