CN1077481C

CN1077481C - Manually operated machine-tool

Info

Publication number: CN1077481C
Application number: CN97180386A
Authority: CN
Inventors: 曼弗雷德·基恩; 阿尔贝特·克莱德尔
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 1996-12-05
Filing date: 1997-10-06
Publication date: 2002-01-09
Anticipated expiration: 2017-10-06
Also published as: DE59709119D1; DE19752810A1; WO1998024589A1; KR20000057372A; EP0942802B1; CN1239912A; EP0942802A1

Abstract

The present invention relates to a manually operated machine-tool, fitted with a disc-shaped tool (18) and a housing (10) for accomodating a work spindle (13), the free end of which (131) bears the tool (18) between a clamping ring (19) and a securing nut (20), both featuring together a securing device (17). The machine is also fitted with a locking device (25) to prevent the spindle (13) from rotating. The locking device has a crown, mounted on the clamping piece, with a least one notch (28), as well as a hand lever (29) provided with a latch tooth (32) to engage the notch (28). For a safer change of tool on the machine, the SDS-click clamping ring (19), as modified according to the standard EP 0 424 388, is captive, torsion-proof and can be fixed to the drive spindle (13) by putting a hexagon socket on an external hexagonal socket head screw, superficially locked in the direction of rotation of the work spindle (13) up to a certain number of rotations by the work spindle (13), and, starting from a given number of rotations, actuated through gearing by means of a spindle-locking device (25) and put in a release position.

Description

Hand tool

The present invention relates to a kind of hand tool, for example: portable abrasive machine, manual circular saw or similar machine.

From EP0339027, known a kind of hand tool that has the clamping device that is used for disc-shaped cutting tool, thereby it can be operated from the outside and unclamp at the bias voltage on the instrument when it is operated and unclamp bias voltage on the locking nut that a relative side clamps, and locking nut can easily be opened with openhanded like this.In this solution, when also moving, can not debug operate by machine, and its consequence is that the disc instrument can be automatically from also unclamping at the main shaft that rotates, and people and article around this can give bring danger.

Known a kind of SDS Ke Like nut (SDS-Click nut) according to EP0424388, it can be used to be equipped with the hand tool of disc-shaped cutting tool, here, this nut can be fixed on the working-spindle free end of supporting disk cutter from the outside, for the replacing instrument, just can regulate in loosening direction rotation with hand, here it, removed the clamping pressure on the disc-shaped cutting tool, can easily SDS Ke Like nut have been screwed down with hand.

In addition, from PCT/DE95/01083, known one type hand tool, its spindle braking system moves by an available lever operated rotating dog (Drehbolzen), and here, a stopping projection that is configured on the rotating dog has a semi-circular cross-section.This stopping projection is predetermined insert clamp flange groove circle be arranged in the opposite, semi-circular groove.Stopping projection enters in this semi-circular groove by the rotation servo-actuated at the operating position that handle is shown.This spindle braking system be familiar with is made simple and reliable operation, yet during the faulty operation spindle braking system, the power that acts between groove and stopping projection is so high, makes vibration can take place to disturb in this case in machine run.

The objective of the invention is, a kind of hand tool is provided, guarantee that SDS Ke Like nut can not take off and can advantageously be unclamped in the machine side on working-spindle, and reduce bearing load.

According to the present invention, a kind of hand tool with a disk cutter and a housing has been proposed, a working-spindle is contained in this housing, this working-spindle is being clamped in cutter between the clamp flange and locking nut that constitutes clamping device on its free end, and this hand tool has a spindle braking system, it can fix working-spindle anti-rotationly, this spindle braking system has one and is installed on the clamp flange, have the groove circle of at least one groove and have a handle, this handle has configuration in the above, the engageable stopping projection that affacts at least one groove with groove sidewall, wherein, special nut that does not have a screw thread is configured as the clamp flange of case side, this clamp flange can particularly can not taken off ground, do not have and relatively rotate ground, a preferably available interior hexagonal is inserted on the outer-hexagonal on the working-spindle, and slow down in the work direction of rotation until prevent the operation axis brake apparatus to offside clamping during certain rotating speed of working-spindle, and when being lower than this regulation rotating speed of working-spindle, can bring the released position into by spindle braking system.Advantage of the present invention

Compared with prior art, advantage according to hand tool of the present invention is, this favourable solution can guarantee that SDS Ke Like nut can not take off and can unclamp by means of the spindle braking system of a special tectonic in an advantageous manner in the machine side on working-spindle, in addition here by means of this clamping device, with locking direction operation clamping device after the automatically stop of main shaft at the traditional locks jack panel that can screw on from the outside.By the structure axial weak point or flat of new-type clamping device, the length that working-spindle can remain unchanged is because because the axial spacing of cutter is not compared not variation with the hand tool position of bearings, bearing load is little.

In addition, stopping projection has only minimum power to arrive clamp flange from handle by stopping projection when faulty operation.Therefore, the danger that when the faulty operation spindle braking system, for example when machine moves, does not have stopping projection or groove to be out of shape.In addition, guarantee that the fixation size in two direction of rotation of working-spindle is differentiated, and it is reliable to compare the brake apparatus of being familiar with, for example, if locking nut clamps with an aid.The trough roller road ascent stage of rolling element has than the high gradient of SDS Ke Like nut, can not unclamp in advance when the faulty operation by this clamp flange, and this has prevented that undesirable cutter from unclamping from working-spindle.

The rear end face of stopping projection slides on the groove circle, until stopping projection can enter in the groove, the projection end face of stopping projection than groove width narrow 1 to 3mm, by this stopping projection is not had at working-spindle and dangerously just can enter when rotating than the slow-speed of revolution.

It is that acute angle, the other end are the profiles of rounding that stopping projection and groove have an end of stipulating in order to be meshing with each other, by this in the power of the work bed knife of direction of rotation between main shaft and spindle braking system during less than the locking nut fixing and locking.

The groove sidewall tilts with respect to a radius against the work direction of rotation of working-spindle, here, at first sidewall of work direction of rotation by the particularly fixedly rib of sharp edge and second sidewalls flex ground carries out the transition to the groove circle by a rounding a profile, stopping projection has fixedly the projection end face of rib and an end profile of a circle of overlap joint sidewall when unclamping locking nut with hooking, the groove side wall supports is on this end profile, here stopping projection approximately than groove little 1 to 2mm, can reach desired bed knife difference especially reliably by this, particularly pass through, groove depth about 3 is to 5mm, wide about 5 to 10mm, and radius about 0.5 is to 1.2mm, and here rounding has one and is approximately 1.2 to 1.8mm radius of curvature, by this, stopping projection is shorter than handle, is 1/3 to 1/2 of its length.

The projection end face of stopping projection is entering in the groove and is distributing obliquely with respect to bottom land when the end profile of circle keeps flat, can further improve the fixed function of spindle braking system by this, because the compressive load per unit area that is meshing with each other between the part has been strengthened.

The projection end face has a v connected in star, and its profile makes in the fixation of locking nut locking direction better according to the groove side wall profile in fixing rib scope by this.

Can express replacing cutter and reliably, cosily clamp the cutter of changing again by means of the comfortable and safe operability of spindle braking system.

Accompanying drawing

At length introduced the present invention in the following description by means of the embodiment shown in the accompanying drawing.

Wherein:

Fig. 1 shows part one longitudinal section according to portable abrasive machine of the present invention,

Fig. 2 shows according to view (bottom view) Fig. 1 arrow II, that do not have the portable abrasive machine of locking nut, emery wheel and protective cover,

Fig. 3 shows the stereo rearview of clamp flange,

Fig. 4 to Fig. 7 shows the detail view of the spindle braking system in four different operating positions,

Fig. 8 and Fig. 9 show the working-spindle exploded view with clamp flange major part with the front from behind,

Figure 10 shows clamp flange with longitudinal section,

Figure 11 shows the vertical view of clamp flange cross section from the front,

Figure 11 a, b, c show the built-in fitting of clamp flange the inside,

Figure 12 shows the details of groove circle with vertical view.

The explanation of embodiment

Fig. 1 has a housing 10 with the portable abrasive machine 9 shown in the longitudinal section, and it has held that do not illustrate, as to have a driving shaft 11, a bevel gearing 12 and a working-spindle 13 drive motors.Working-spindle 13 can be rotated to support on 15 li of ball bearing 14 and needle bearings, and two design bearing become journal bearing.Needle bearing 15 is contained in 10 li of housings, and ball bearing 14 is contained in 16 li of the bearing flanges that plastics make.This bearing flange 16 is connected with housing 10 flanges and has settled a portable abrasive machine guard shield 161 on its excircle of indicating as neck 160.

The free end 131 of working-spindle 13 is axially stretched out by bearing flange 16.A clamping device 17 is housed on this free end 131, and this clamping device will clamp with the cutter 18 of chopping disk or emery wheel form.

Clamping device 17 include one be installed on working-spindle 13 free ends 131 with do not have with the relative rotation with this main shaft and radially reach the axially not removable clamp flange that is connected 19 and a locking nut 20.Locking nut 20 can be screwed on the thread segment 21 of working-spindle free end 131.Cutter 18 is arranged to one on the axle journal 23 that clamp flange 19 end faces form by what hole 22 shapes that center that are positioned at the center were coincide, and can by means of locking nut 20 by transmission power be pressed onto on the annular end face 191 of clamp flange 19.Between locking nut 20 and cutter 18, assembled a pad 24.

Working-spindle 13 can stop operating when operating its handle 29 by a spindle braking system 25.For this reason, spindle braking system 25 have one clamp flange 19 outside that constitute, have many mutually with the groove circle 27 of the groove 28 of identical anglec of rotation intervals, radially, square-section, and one with 27 mating reactions of groove circle, its projection end face 37 is the stopping projection 32 (Fig. 2) of hook-type profile.The profile of the profile of groove 28 and stopping projection 32 is so mutual coordinations, thereby stopping projection 32 at working-spindle 13 static or only when engaging into groove 28 under the low velocity rotation very, that is to say and under desirable situation, make clamp flange 19 and working-spindle 13 is stopped operating, and under undesirable situation, when that is to say when motor moves the operation axis brake apparatus, groove circle 27 is with the power effect of minimum and small vibration refusal stopping projection 32, and working-spindle 13 can not be stopped.Only comparing by projection bearing-surface 37 with groove 28 width, the minute widths difference of poor about 1mm obtains this coordination.By this, stopping projection 32 must be in little time, be swinging into bottom land 45 at working-spindle 13 during along the operation of rotation of work direction of rotation and handle 29 always, makes it can act on 28 li of grooves regularly and groove circle 27 is stopped operating together jointly with working shaft 13.

The groove 28 of groove circle 27 has relatively and passes the hypothesis radius of coming out at working-spindle 13

centers

42,44 and flat basically bottom lands 45 of groove sidewall that tilt, substantially parallel according to Fig. 2.

Groove sidewall

42,44 is tilted to the right along direction of observation, that is to say, passes the radius of coming out at working-spindle 13 centers be tilted to the right (Fig. 2) against direction of rotation arrow 50 with respect to one.

Stopping projection 32 is built into the free end of rotating dog 31, and this rotating dog can be rotated to support on 16 li of bearing flanges.The rotation 30 and working-spindle 13 extends parallel of rotating dog 31.The handle 29 that is standing at vertical angle is fixedlyed connected with rotating dog 31, and here, handle 29, rotating dog 31 and stopping projection 32 are by many parts ground, especially by plastic production.

Handle 29 is positioned near the end that rotating dog 31 deviates from stopping projection 32, and here, a distolateral rotating dog section 311 axially continues to extend beyond handle 29 and is supported in 16 li of bearing flanges.A back-moving spring 33 that constitutes as torsionspring is shifted onto on the distolateral rotating dog section 311, and an end of spring is fixed on the bearing flange 16, and the other end of spring is fixed on the rotating dog 31.

Back-moving spring 33 is like this designs, and it attempts to make rotating dog to rotate to home position, stopping projection in the home position 32 fully from 28 li of grooves show and directly spaced radial ground be positioned at groove circle 27 fronts on the clamp flange 19.This home position of rotating dog 31 or stopping projection 32 is given by a stop part 34 that constitutes on clamp flange 16, and handle 29 abuts (Fig. 2) on this stop part.Handle 29 radially stretches out this flange a little and has a handle panel 291 in a side by a hole 35 of 16 li of bearing flanges.

Fig. 2 shows stopping projection 32 as the lever arm of little length with the vertical view of portable abrasive machine 9 from a side of clamp flange 19, it has profile straight or rounding on the radial outside of clamp flange 19 dorsad, this profile beak shape ground, away from handle 29, end rib 38 by a small curvature radius rounding on clamp flange 19, radially inner side, transition be flat, particularly spill, with the projection end face 37 radius of curvature bending, that have a rear end rib 38 ' identical with groove circle 27, and carry out the transition to a v connected in star 39 at rear end rib place.Fixedly the profile phase at rib 41 positions is consistent at acute angle with groove 28 left side walls 42 basically for this groove 39, this fixedly rib 41 constitute by the transition of groove sidewall 42 to groove circle 27 peripheral curved.

Clamping disk(-sc) 62 has one mainly to be the end face 621 of radially slotting.The end face 621 of fluting is used for fixing clamped, the disc-shaped cutting tool 18 of high compressive load per unit area.

If should change cutter 18, then at first unclamp fixing locking nut 20 by means of the spanner that does not illustrate.For this reason, for steady job main shaft 13, operating personnel are put into a finger on the handle panel 291 of handle 29 and according to the direction of arrow 26 turning handles 29 of Fig. 2.Like this, rotating dog 31 clockwise directions overcome the power rotation of back-moving spring 33.In this case, stopping projection 32 swings in 28 li of the grooves of groove circle 27.On the groove sidewall 44 on the right of the end rib 38 of stopping projection 32 roundings supports to or the rounding 46 of its clamp flange 19.Rounding 46 and end rib 38 are determined size like this, and the loosening moment on the locking nut 20 is big more, and then stopping projection 32 just is fixed on the groove sidewall 44 more muchly.

Coincide by the shape between groove 28 and the stopping projection 32, at handle 29 fixedly the time, clamp flange 19 and working-spindle 13 position that is fixed, non-rotatable.Now, locking nut 20 can unclamp without a doubt by means of a spanner.

Change after the cutter 18, also operation axis brake apparatus 25 is good when tightening locking nut 20.In order to tighten locking nut 20, handle 29 is rotated to operation arrow 26 directions.If now with locking nut 20 to the locking direction, that is to say that against 13 rotations of the relative working-spindle of work direction of rotation, then it makes working-spindle rotate with tangible slip servo-actuated.By this, groove circle 27 with groove 28 together relatively stopping projection 32 rotate like this, have the projection end face 37 of groove 39 and overlap with fixing rib 41.Therefore, clamp flange 19 is fixed and with it working-spindle 13 is fixed against the locking direction of locking nut 20, in other words, and fixing fixedly rib 41 like the rear end rib 38 ' hook of projection end face 37.

Be operated personnel and unclamp if tighten after the locking nut 20 handle 29, back-moving spring 33 make rotating dog 31 according to Fig. 2 against clockwise direction or against the direction of arrow 26 rotations until till handle 29 runs into block 34 on the axle journal 16.Carry out this when rotatablely moving at rotating dog 31, stopping projection 32 is showed in groove reliably fully, and clamp flange 19 can rotate freely.

The through hole 36 ' that the clamp flange 19 that Fig. 3 illustrates from behind with stereogram has hexagonal moulding in the conduct is used for not having the free end 131 of overlap joint working-spindle 13 with relatively rotating, and this end is furnished with the outer-hexagonal 36 that is complementary.Have the moulding,

groove sidewall

42,44, rounding 46 of the groove 28 of whole rounding profile and fixedly the configuration of rib 41 be clearly visible.In addition, can see radially three of the inside guiding slots 271 between groove circle 27 and supporting disk 63, they carry out the transition to three evenly spaced radially inwardly towards radial projection 79, they are by the radial projection 77 that is directed in the slot 271 in guiding of support ring 63, clearly show that this support ring at Fig. 8,9 etc.

The local detail view that shows the spindle braking system 25 in the different operating position of amplifying of Fig. 4 to 7, Fig. 4 shows the neutral position of stopping projection 32 opposed slot circles 27 grooves 28 when not having to operate the spindle braking system 25 with handle 29, stopping projection 32 and groove circle 27.

Stopping projection 32 when Fig. 5 shows faulty operation that is to say, when direction of arrow fast rotational driven shaft 13 under the situation of operation axis brake apparatus 25 on groove 28 unaccredited situation.Be clear that here the end rib 38 of slight rounding slips away at rounding 46 places of groove sidewall 44, has stoped stopping projection 32 to enter groove 28 like this.Compare with groove 28, the size of stopping projection 32 is a little bit smaller a little.From then on can be clear that only when fixedly rib 41 arrived groove 39, stopping projection 32 just can come out to enter 28 li of grooves from its Support Position at the radially outward edge of groove circle 27 when operation axis brake apparatus 25.But because 46 of roundings are from end rib 38 about 1mm in this position, at the bottom of end rib 38 arrival slots 45 and can be supported on trough rim 44 with stopping before, lead circle and bump together mutually with holding rib.

Exactly, stopping projection 32 is rejected acceptance on rounding 46 after the operation oscillating stroke of short relatively futile effort, and has experienced very short, unaccredited backstroke.This has caused, and spindle braking system is mild when its faulty operation, vibrationless reaction almost, correspondingly obtains job security.By this, working-spindle 13 only can be by stop thus when its rotating speed is enough little.

Fig. 6 shows the position that enters groove 28 with enough slow rotating speed stopping projection 32 when the working-spindle 13 of work direction of rotation operation is braked, and here, the end rib 38 of rounding is not supported on the groove sidewall 44 with slipping away.Main point rib 38 is because the moment of unclamping on the locking nut 20 is supported on the groove sidewall 44 with keeping automatically, and locking nut 20 can unclamp, and spindle braking system 25 needn't keep with being operated.

The stopping projection 32 of little microscler shape is short a bit a little shorter with 38 width than locking groove 28 of end rib than operating grip 29 unimportantly, by this, stopping projection 32 can only be swung with relatively little power and also only can be entered groove 28 when the less rotating speed of groove circle 27 by this.Its reason is, only exists the gap of about 1mm when stopping projection 32 can swing in groove 28 between end rib 38 and rounding 46, when it overlaps, at the stopping projection on its braking distance 32 at the bottom of the arrival slot 45.In groove circle 27 working speeds, compared with end rib 38 can arrival slot at the bottom of 45 and can be supported on there on the precipitous position of groove sidewall 44 with braking, this 1mm is passed through soon manyly.Stopping projection is run on the rounding 46 of the groove sidewall 44 that continues rotation after oscillating stroke short, that available relatively little power begins, and stopping projection is not accepted, and only produces small vibration and noise here, and can not make operating personnel's irriate.

Fig. 7 shows, and when tightening locking nut 20, working-spindle 13 is rotating with groove circle 27 jointly with the rightabout shown in Fig. 6, has stoped working-spindle 13 to continue rotation when locking nut 20 is tightened.When locking nut 20 is tightened, for example, with a spanner, working-spindle 13 servo-actuateds rotation, groove circle 27 is with its rotation.Here, if operating

grip

29,28 li of stopping projection 32 arrival slot.In this case, the rear end rib 38 of stopping projection 32 hooks below the fixedly rib 41 of groove sidewall 42 like this, only returns rotation when some at groove circle 27 against the locking direction, and it could unclamp again.Therefore, handle 29 only must be operated with being snapped into when locking nut 20 lockings,, and then can vacate the hand of operating grip 29 here, such as be used for buttressing hand tool when clamp-on tool.

There is shown the working-spindle 13 with outer-hexagonal 132 in Fig. 8,9 decomposition, it is equipped with major part, support ring 63, groove circle 27 and the clamping disk(-sc) 62 of clamp flange 19.Its interior hexagonal 36 nothings of support ring 63 usefulness are inserted on the outer-hexagonal 132 of working-spindle 13 with relatively rotating.It axially is supported in rigging position on the groove circle 27, and here, the groove circle can rotate and this support ring of radial overlap with respect to support ring 63 limitedly.Support ring 63 has in one axially adjacent with interior hexagonal 36 two-sided 721, its anti-rotation ground, but axially movably cooperate with outer two-sided 72 of clamping disk(-sc) 62.Radially outer has disposed projection 77 with identical spacing mutually on support ring 63, and they are as coexist corresponding projection 79 mating reactions of inner radial configuration in groove circle 27 wheel rims 791 of the block of restriction rotation.Constitute slot 271 (Fig. 3) by projection and corresponding projection 77,79 together jointly with wheel rim 791, this slit allows the limited rotation each other of these parts.Under the situation of faulty operation spindle braking system 25, thereby this rotation restriction has stoped groove circle 27 relative support rings 63 to rotate excessive and has damaged part or the function face that is installed in clamp flange 19 inside.

Working-spindle 13 has a cannelure 81 at its free end 131, is used to put into annulus 80 (Fig. 1), and this annulus makes clamp flange 19 end play ground be arranged, still can prevent from disengageably to be fixed on the working-spindle 13.

Seen three trough roller roads 67 that radially are positioned at the inside on groove circle 27, they carry out the transition to the radially inside gradient part 673 of guiding and carry out the transition to a groove 674 of guiding radially outward therefrom respectively of a part scope respectively from the radially protruding inwards block 672 of a profile of tooth respectively.If clamp flange 19 is adjusted to its loosening position by swivelling chute circle 27, can allow here according to three rolling elements 68 of Figure 11.

On clamping disk(-sc) 62, be clear that and prevented relatively rotating the fluting 621 of ground fixed disc shape cutter and being used for the neck-receiving 23 that cutter centers.

Fig. 9 shows clamping disk(-sc) 62 along left direction of observation is clear from behind, wherein, can see its cylindrical center cylindrical casing 71, and it has one two-sided 72 and at a cannelure 711 of outermost end.This cannelure 711 is used to insert annulus 712 (Figure 10), and annulus interfixes clamp flange 19 axial locations, like this its below shown in the accompanying drawing, built-in part with groove circle 27 and support ring 63 together mutually axial restraint can not take off.

Figure 10 shows annulus 712 on clamping disk(-sc) 62 cylindrical casings 71 with the longitudinal section of clamp flange 19, and this ring is fixed the mutual axial location of the part position of clamp flange 19, to bring into play their function.In addition, different with earlier figures is, show one and sitting plastics labyrinth circle 76 and the spring of putting on the support ring 63 cylindrical shaft shoulders 631 69 on the clamp flange 19, this spring makes it and returns to its initial position according to the rolling element 68 of Figure 11 and comes on the block 672 after groove circle 27 unclamps stroke, clamp flange 19 is preparing to be used for new clamping process like this, for example, be portable abrasive machine 9 mounting cutters 18.

Clamping disk(-sc) 62 axially can be supported on the support ring 63, so that bear the axial clamping force by locking nut 20 relative cutter 18 effects.Clamping disk(-sc) 62 can move axially and can not connect with the relative rotation together with support ring 63 with respect to working-spindle 13.

Cross section be wedge shape, as supporting mass 64 axial support of annulus section structure be positioned between the

conical end face

65,66 of clamping disk(-sc) 62 and support ring 63, like this, between clamping disk(-sc) 62 and support ring 63, formed a cannelure.

As the groove circle 27 of operating parts be axially placed between clamping disk(-sc) 62 and the support ring 63 and with they radial overlaps, this groove circle is keeping under the movement clearance situation and clamping disk(-sc) 62 overlap joints at axial direction with annular lip on it 70.Annular lip 70 almost stops with the profile of clamping disk(-sc) 62 end faces 191 on axially with flushing.Groove circle 27 is axially having movement clearance between clamping disk(-sc) 62 and support ring 63, and the two rotation relatively.

Groove circle 27 contains trough roller road 67 in inner radial, trough roller road such as can be cylindrical.Opposed slot raceway 67 is with the radial spacing that the is about as much as rolling element 68 diameters corresponding corresponding raceway 641 that distributing on the radially outer circumference surface of supporter 64.Supporter 64 by means of the rolling element 68 (Figure 11) of the operation on

raceway

67 and 641 and the cylinder form of rolling by radial loaded.

Figure 11 shows in the embodiment shown three rolling elements of settling mutually with about identical angle of circumference spacing 68, rolling element with the concentric raceway 67,641 of central axis on operation and here contact with supporter 64 on the one hand and contact with groove circle 27 on the other hand.Radial support is on clamping disk(-sc) 62 and support ring 63 rotatably by rolling element 68 for groove circle 27, and here, partial fixing of bending out with anti-hook-type with the cam ring 78 of plate compacting is 632 li of the axial notches of support ring 63.Cam ring 78 has constituted chuck and a bearing and a stop surface that is used for rolling element 68 that is used for spring 69.

At groove circle 27 according to motion arrow 26 at direction of observation during to right rotation, rolling element 68 rolls to the right on supporter 64, here, groove circle 27 force rolling elements 68 about 15 °, radially inwardly roll on the gradient part 673 of trend until 674 li of the recesses in trough roller road 67.Because gradient part 673 has been created more formidable pressure spot, its stops the unclamping of clamped position that produces undesirable clamp flange 19 owing to faulty operation spindle braking system 25, by this, only be safe from danger than low engine speed range in just can regulate the released position of clamp flange 19 during handle 29 at operation axis brake apparatus 25.In this position, rolling element 68 has arrived recess 674, and rolling element radially outward enters recess, like this, the supporter 64 that wedge shape clamps between the end face of support ring 63 and clamping disk(-sc) 62 can radially outward move equally, radially discharges the clamping pressure from rolling element 68.Therefore, clamping disk(-sc) 62 and support ring 63 can axially move mutually in opposite directions.The structure of this motion process and the functor of clamp flange 19 inside is consistent with situation about illustrating in patent specification EP0424388 basically.

Figure 11 shows corresponding grooves 674 in each rolling element 68 trough roller roads 67 scope.It respectively by one radially outwards recessed in trough roller road 67, form to the ball recess of central open.Here, each groove 674 is obtained like this, and when rolling element 68 rolls and when arriving each corresponding grooves 674, rolling element 68 radially outward moves.By this, supporter 64 above-mentioned radially unloading and the axial unloading between clamping disk(-sc) 62 and support ring 63 have subsequently been produced.Here, at least one in two

end faces

65,66 is made of the

anchor ring

65,66 that stretches with supporter 64 parallel sided, and the supporter 64 that cross section is wedge shape is axially placed between these two end faces.Wedge shape ring surface 65,66 (Figure 10) is owing to the bias voltage of locking nut 20 is attempted supporter 64 is radially outward pressed.Corresponding to each

ring surface

65 or 66, supporter 64 is not only in the axial side towards ring surface 65, and also has the identical bearing-surface 642 of cross section or 643 in opposite opposed axial side.By this, as long as rolling element one snaps in groove 674, supporter 64 just follows rolling element 68 closely and radially outward moves.As long as the axially motion mutually of clamping disk(-sc) 62 and support ring 63, clamp flange 19 is reduced like this with respect to the clamping force of the cutter 18 that clamps, and lock-screw or locking nut 20 can easily be unclamped from working-spindle 13 with hand.

Three ring segment-shaped supporters 64 of circle as can see from Figure 11, their spaces are identical angle of circumference approximately., remain with the space respectively here between adjacent mutually supporter 64, about stop part 781 parallel with axis of lobe plate 78 stretches in these spaces.These stop parts 781 are positioned at rolling element 68 rolling scopes outside, and like this, they do not hinder the rolling movement of rolling element between raceway 641,67.Stop part 781 is located and is guaranteed that supporter 64 is positioned at its position in tangential direction.

Groove circle 27 is furnished with a projection shape block 672 for each rolling element 68, and this block profile of tooth radially stretches in the raceway of each rolling element that is positioned at the front 68 inwards, and has formed a bearing-surface that shape is coincide for rolling element.

As the groove circle 27 that sintered part constitutes, on its end face, have around, cylindrical upper and lower annular flange 84,85.Clamping disk(-sc) 62 is radially overlapped to small part by annular flange down by last annular flange, support ring 63.

Annular flange

84,85 and clamping disk(-sc) 62 or and support ring 63 between a

sealing ring

86,87 is housed respectively.

Sealing ring

86,87 is used for sealing inner chamber clamp flange 19, that fenced up by support ring 63, clamping disk(-sc) 62 and groove circle 27.In addition, sealing ring is axially fixed in groove circle 27 relative support rings 63 in its position at least.Support ring 63 and clamping disk(-sc) 62 its outer edges and mutually towards inner face on have convex shoulder, it has constituted the stepped annular holding portion that is used for sealing

ring

86,87 there.

Clamping disk(-sc) 62 on a side of cutter 18, be equipped with one axially protrude hold axle journal 23, disc-shaped cutting tool 18 can centrally be contained on this axle journal.A horizontal slot 622 passes this and holds axle journal 23, and in order to unload clamp flange 19, the erecting tools that is used to dismantle the safety collar 80 that is positioned at working-spindle 13 cannelures 81 removably passes this slot.Hold axle journal 23 externally be used to improve annulus 231 that cutter 18 centers around.

Between clamping disk(-sc) 62 and support ring 63, installed as the cam ring 78 of built-in fitting by sheet metal forming.This cam ring 78 is formed to the flat plate ring of small part by one, and this plate annulate shaft to resting on the distolateral anchor ring 65 of support ring 63 with supporting.

Figure 11,11a to c show, and cam ring 78 is stretching the section of having 781 on the circumferential section of supporter 64 thereon, and particularly ring segment 781, and supporter 64 axial support are on it.The angle of circumference length of each ring segment 781 at least approx with the angle of circumference equal in length of each supporter 64.

The equally big angle of circumference in section 781 spaces of cam ring 78.The plate section that section 781 planes that are constructed to the flat ring segment 782 of slave plate profiled member bend out.These plate sections are bent upwards under identical angle at least, and the end face 65 of support ring 63 extends in its lower section, and this end face has constituted an axially mounting face that is used for tilting section 781.

In addition, cam ring 78 has safety member 783 upright, that axially point to towards support ring 63, for example nose.632 li of the corresponding holding portions of the axial blind hole form in these safety member 783 engagement insertion support rings 63, like this, cam ring 78 is connected with support ring 63 in the tangential direction shape with coincideing.Safety member 783 preferably disposes and is constructed to projection mutually with identical big angle of circumference spacing, they are bent downwardly by the plane of the flat ring segment 782 of cam ring 78 approximately at right angles, and insert in that be open upwards, the corresponding holding portion 631 there.

Cam ring 78 has radially outward crooked stop part 784, on the one hand spring 69 and on the other hand rolling element 68 meet on this stop part.These stop parts are laterally bent by cam ring 78 in the track that to enter rolling element 68, and here each rolling element 68 has a stop part 784.Each stop part 784 is from flat ring segment 782, and from approximately repeatedly bending of right angle here, curved the about quadrangle or the cross section of pipe for example, and like this, it can enter in the raceway of rolling element 68 aloft.Each of stop part 784 is bent the shape of plate section and/or size and selects so greatly at least, and the respective end of corresponding rolling element 68 and spring 69 is supported on respectively on a side and the opposite side reliably.

In addition, cam ring 78 has stop part 785 in inner radial, and it axially protrudes upward and make supporter 64 radially to locate in its position.Stop part 785 be constructed to from cam ring 78 that shear out and be supported on the upwards brace that separates of the fan-shaped section 781 of bending of end face 65 that support ring 63 tilts, they protrude upward end face 65 bendings.Here, stop part 785 is in two circumferential notch scopes that constitute between the fan-shaped section 781 that tangential direction is separated by with a determining deviation.

In the illustrated embodiment, two stop parts 785 that have spacing mutually in tangential direction are positioned in the circumferential notch.Here, as keeper, a stop part 785 is the relative end configuration of supporter 64, and another stop part 785 is the relative end configuration of next supporter 64.Constructed a tongue tray section 787 in the breach scope between per two stop parts 785, it at the intermediate cavity position axes inside of inner radial between two supporters 64 to protruding upward.The plate section 787 that this protrudes upward approximately is placed on the identical circumferential location, respectively as samely be placed in safety member 783 on the cam ring 78 at radially outer.

Particularly Figure 11 c shows the detail view of plate section 787 about ligulate, that make progress bending.On this junction fragment 787, connecting a relative therewith bending and end section 788 radial outward.This two on cross section, approximately be the V-arrangement that keeps flat, its opening radial outward.This approximately is that plate section 787 ligulate, towering has constituted the safety device that is used for spring 69 when clamp flange 19 is installed.

The element of all explanations all is the part of cam ring 78, and cam ring resembles a rolling bearing retainer, can make clamp flange 19 simple in structure and reduction expenses by this.Cam ring 78 axial elasticity ground pushing support ring 63 and clamping disk(-sc) 62, make them separately, clamp flange 19 has always automatically occupied its restraint location again after the released position is regulated like this, and from this position, it can bring the released position into again by swivelling chute circle 27.As long as groove circle 27 1 is released, it just automatically rotates and returns to its clamped position, here, rolling element 68 returns to its home position, and in this position, they are supported on the stop part 672 of groove circle 27, here, by the separately pushing effect of cam ring 78, supporter 64 can radially be hidden inwards, and has produced the clamped condition of clamp flange 19 by this.

Figure 12 shows the details of groove circle 27,, can see the profile in trough roller road 67 here, has the ascent stage 671 of three configurations respectively, the stop part 672 of servo-actuated, about 15 ° gradient part 673 and groove 674.

Claims

1. the hand tool that has a disk cutter (18) and a housing (10), a working-spindle (13) is contained in this housing, this working-spindle is gone up at its free end (131) cutter (18) is clamped between the clamp flange (19) and locking nut (20) that constitutes clamping device (17), and this hand tool has a spindle braking system (25), it can fix working-spindle (13) anti-rotationly, this spindle braking system has one and is installed on the clamp flange (19), have the groove circle (27) of at least one groove (28) and have a handle (29), this handle has configuration in the above, engageablely affact at least one and have groove sidewall (42,44) stopping projection (32) in the groove (28), it is characterized in that

One does not have the special nut of screw thread to be configured as the clamp flange (19) of case side, this clamp flange can be particularly can not take off ground, do not have relatively rotate ground, preferably an available interior hexagonal (36) is inserted on the outer-hexagonal (132) on the working-spindle (13), and the work direction of rotation slow down until during certain rotating speed of working-spindle (13) offside clamping ground prevent operation axis brake apparatus (25), and when this that is lower than working-spindle (13) stipulated rotating speed, can bring the released position into by spindle braking system (25).

2. according to the described machine of claim 1, it is characterized in that,

Groove circle (27) on the clamp flange (19) of spindle braking system (25) on can same working-spindle (13) can offside clamping engagement ground and in the opposite direction be connected effect in the work direction of rotation with hooking, wherein, as long as the rear end rib (38 ') of stopping projection does not have arrival slot sidewall (42) to locate, got rid of stopping projection (32) insertion by its shape and size and be engaged in the groove (28).

3. according to the described machine of claim 2, it is characterized in that,

The rear end rib (38 ') of stopping projection (32) can go up slide at groove circle (27), and stopping projection (32) can enter in the groove (28) and fix, the projection end face (37) of stopping projection (32) than the width of groove (28) narrow 1 to 3mm.

4. according to the described machine of claim 3, it is characterized in that,

It is that acute angle, the other end are the profiles of rounding that stopping projection (32) and groove (28) have an end of determining in order to be meshing with each other.

5. according to the described machine of claim 4, it is characterized in that,

At least two groove sidewalls (42,44) rear wall tilts with respect to a radius against the work direction of rotation (26) of working-spindle (13), here, first groove sidewall (42) in work direction of rotation (26) passes through a particularly fixedly rib (41) of sharp edge, and second groove sidewall (44) carries out the transition on the profile of groove circle (27) by a rounding (46) agley, stopping projection (32) has one and hook groove sidewall (42) fixedly the projection end face (37) of rib (41) overlap joint and the end rib (38) of a rounding when unclamping locking nut (20), second groove sidewall (44) can be bearing on this end rib, here, stopping projection (32) approximately than groove (28) narrow 1 to 2mm.

6. according to the described machine of claim 5, it is characterized in that,

The degree of depth of groove (28) is approximately 3 to 5mm, and width is approximately 5 to 10mm, and radius is approximately 0.5 to 1.2mm, and here, the radius of curvature of rounding (46) is approximately 1.2 to 1.8mm.

7. according to claim 2 or 3 described machines, it is characterized in that,

Stopping projection (32) is constructed to 1/3 to 1/2 lever arm of so growing of handle (29).

8. according to claim 2 or 3 described machines, it is characterized in that,

The projection end face (37) of stopping projection (32) distributes obliquely with respect to bottom land (45).

9. according to claim 2 or 3 described machines, it is characterized in that,

Can come the rotation of limiting groove circle (27) by projection radially, that be used as stop part (77,79) with respect to support ring (63).

10. according to claim 2 or 3 described machines, it is characterized in that,

Trough roller road (67) has about 15 ° a gradient part (673), and it has constituted the pressure spot that prevents faulty operation.

11. according to the described machine of claim 1, it is characterized in that,

It is described that not have the special nut of screw thread be SDS Ke Like nut.