CN102672684B - Tool collet - Google Patents

Abstract

The present invention relates to the tool collet of a kind of toolroom machine for dental formulas work, described tool collet has: be concentric with the receiving sleeve that axis of operation (10) is arranged, in order to accommodate the rod end (3) with locking slot of instrument (4)；Locking body, this locking body is partly advanced by leaps and bounds in described receiving sleeve, and in order to embed at least one locking slot described, and this locking physical ability is moved along described axis of operation (10)；Chute, guides described locking body in this chute, and this chute has part that is that wind or that be inclined to described axis of operation (10) around described axis of operation (10) spirality.

Description

Tool collet

Technical field

The present invention relates to a kind of tool collet, especially for dental formulas work, pure dental formulas The tool collet of that work and/or the work of Drilling formula toolroom machine.

Background technology

Percussive drill is taken out together with dental formulas instrument from basis or workpiece once user, punching The toolroom machine hitting rig or another kind of dental formulas work just should stop its operation voluntarily.Reduce whereby and make User and the load of percussive drill.Lift when instrument typically for percussive drill and connect from instrument Receive time device is maximally removed, then cause cut-out.Certainly instrument is due to the last impact accepted May rebound on stopper section, and again access in tool collet.This kind of so-called sky The buffering carrying impact can stop such recoil and contribute to cutting off automatically.

Summary of the invention

Have according to the tool collet for the toolroom machine of dental formulas work of the present invention and be concentric with The receiving sleeve that axis of operation is arranged, in order to accommodate the one or more locking slot of having of instrument Rod end.The locking body of tool collet is partly advanced by leaps and bounds in receiving sleeve, in order to embed locking In groove.Locking body can move along axis of operation.Chute is so engaged in locking body so that chute Cither indirectly or directly guide locking body.Chute has around axis of operation spirality winding or inclined Tiltedly in the spiral section of axis of operation.The translational motion when no-load percussion of instrument causes lock Tight body is along the drive of axis of operation.Chute forces at least one component of toolroom machine relative to instrument Relatively rotate, whereby impact energy is changed into rotational at least partially.The space spiral shell of chute Rotation characteristic stops, in order to the rotational of the return movement of instrument is recoverable in toolroom machine.Work Tool preferably keeps disengaging.If chute relative to locking body around axis of operation rotatably arranged with, The locking body being then axially movable can be forced to rotate and/or make chute itself by chute Rotate.In addition replacing the rotation around axis of operation, the component of chute can be the most vertical Move in axis of operation.

A kind of form of implementation sets, and locking sleeve is to be radially directed towards the inner faces contact institute of axis of operation State at least one locking body, and chute constructs on the inner face of locking sleeve.Locking sleeve has Having big the moment of inertia, most impact energy can be changed into rotational by this moment of inertia.Locking Sleeve can rotatably support around axis of operation.

A kind of form of implementation sets, and locking sleeve has space on inner face, another locking body Advancing by leaps and bounds in this space, this space size along the circumferential direction is more than chute size along the circumferential direction. Described space can have a side being parallel to axis of operation, and chute can have and is inclined to Axis of operation or around axis of operation winding side.There is multiple lock for locking tool In the tool collet of tight body, it can be beneficial that only by one of them locking body at spiral Shape or mandatory guidance in the chute of deflection.This locking body or other locking bodies can not be subject to The impact of chute and the impact of the rotary motion of chute, in one or more spaces along working shaft Line moves in locking sleeve.

A kind of form of implementation has disengagable chute locking device, and this chute locking device is at lock To impact direction, chute applied power by means of spring on tight position, and on unlocked position, make bullet Spring and chute uncoupling.Locking sleeve can move along axis of operation, can reduce opposing whereby and rotate Frictional force.Additionally, the rotary motion of locking sleeve reduces, because this locking sleeve can be with Locking body synchronously axially-movable.Chute locking device can have spring and coupling element.Institute State coupling element and be applied in power by spring to impact direction, be adjacent to locking sleeve.Instrument is received Device can be relative to locking sleeve in contrast to impact direction by user steerable manipulation sleeve Motion.Handle sleeve can also be connected with coupling element, such as material in locking manner or shape in locking manner Connect.Alternatively, or in addition, handle sleeve to be directly bearing in contrast to impact direction Indirectly it is bearing on coupling element on coupling element or by being rigidly connected.

Accompanying drawing explanation

Hereinafter describe, by each exemplary form of implementation and accompanying drawing, the present invention is described.Accompanying drawing is as follows:

Fig. 1 hand held power machine,

Fig. 2 to 4 tool collet,

Fig. 5 and the locking sleeve of 6 tool collet,

Fig. 7 to 9 tool collet,

The locking sleeve of Figure 10 tool collet,

Figure 11 and Figure 12 tool collet,

The locking sleeve of Figure 13 to Figure 15 tool collet,

The view of the expansion of Figure 16 locking sleeve,

The receiving sleeve of Figure 17 and Figure 18 tool collet.

Detailed description of the invention

As long as no additionally explanation, the identical element of identical or function is in the various figures with identical Labelling is indicated.As long as no additionally clearly stating, radial direction is about work with axially direction The axis of operation of tool machine.When not having other note, each orientation is rushing relative to toolroom machine Hitting direction explanation, therefore, element below staggers along impact direction relative to element above. Length shows the size in maximum (longitudinally) direction extending size along object, and width is to hang down Straight full-size in the plane of longitudinal direction.

Fig. 1 schematically shows the impact of the example of the hand held power machine as the work of Drilling formula Rig 1.Percussive drill 1 has tool collet 2, may be inserted into work in this erecting device The rod end 3 of the such as Drilling head 4 of tool.Motor 5 constitutes the main driving means of percussive drill 1, This motor drives percussion mechanism 6 and output shaft 7.User can guide punching by means of handle 8 Hit rig 1, and percussive drill 1 can be made to operate by means of system switching 9.In operation, Percussive drill 1 makes Drilling head 4 rotate continuously around axis of operation 10, and can be at this by Drilling 4 squeeze in basis along axis of operation 10 to impact direction 11.

The percussion mechanism 6 that percussion mechanism 6 is the most pneumatic.Activator 12 and impacter 13 exist In percussion mechanism 6 movably guided along axis of operation 10.Activator 12 is via eccentric 14 Or rocking pin is bonded on motor 5, thus this activator is forced to do the linear motion in cycle.Logical The air spring crossing pneumatic cavity 15 composition between activator 12 and impacter 13 will punching The motion hitting device 13 is joined in the motion of activator 12.Impacter 13 can directly bump against brill To impact on the rear end of chisel head 4 or indirectly via substantially stationary motionless middle impacter 16 A part for the momentum of device 13 passes to Drilling head 4.Percussion mechanism 6 and preferably other driving Parts are arranged in casing 17.

Fig. 2 and Fig. 3 illustrates the thin of the tool collet 2 of the rod end 3 including exemplary insertion Joint, this rod end illustrates at the home position for drilling operation in fig. 2, is i.e. adjacent to middle punching Hit device 16, and this rod end position when no-load percussion in figure 3 illustrates.Fig. 4 is shown in Cross section in plane IV-IV.Tool collet 2 has receiving sleeve 20, this receiving set Cylinder is concentric with axis of operation 10 and arranges.Accommodate the cylindrical or prismatic cavity of sleeve 20 The internal diameter of 21 is nearly equal to the external diameter of rod end 3 with slight play, this rod end substantially mark Standardization.Rod end 3 guides along axis of operation 10 in accommodating sleeve 20.Shown instrument connects Device 2 of receiving has multiple rib 22, for rotarily driving of rod end 3.Each rib 22 rigidity Ground is connected with accommodating sleeve 20 and extend in cavity 21.The instrument being suitable for, such as Drilling Head, has multiple unlimited cannelure, described rib 22 on the rod end of described applicable instrument It is embedded in these cannelures.Therefore rod end 3 locks, and prevents relative to the phase accommodating sleeve 20 To rotation, thus the torque being applied to accommodate on sleeve 20 of driving means passes to instrument 4.

Accommodate sleeve 20 by the break-through of two elongated holes 23, described elongated hole radially, the most vertical Directly open wide cavity 21 in axis of operation 10.Elongated hole 23 along axis of operation 10 size typically Less than elongated hole 23 along the size of the circumferencial direction 24 around axis of operation 10.Locking body 25 inserts In elongated hole 23 and can move along axis of operation 10.Longitudinal side 26 of elongated hole 23 is at elongated hole Between front end 27 and rear end 28, locking body 25 is guided along axis of operation 10 in 23.Locking body The example of 25 is ball, rolling roller, claw or sliding pin.The radial dimension of elongated hole 23 is less than The radial dimension of locking body 25.Locking body 25 the most outwards, i.e. away from axis of operation 10 exceeds Accommodate sleeve 20 to highlight, and inwardly advance by leaps and bounds in the cavity 21 accommodating sleeve 20.

Rod end 3 has one or more locking slot 29 closed in both sides along axis of operation 10, Locking body 25 is embedded in described locking slot.In shown rod end 3, cannelure is set as lock Tight groove 29.Instrument 4 maximally inserts in tool collet 2 on home position, now locks Tight body 25 can be adjacent to the front end 27 of elongated hole 23.When the no-load percussion of instrument 4, instrument 4 In tool collet 2, the first section can be moved along axis of operation 10, and do not drive locking Body 25, and and then can move the second section, now locking body 25 is moved along elongated hole 23 It is dynamic, until locking body 25 is adjacent in rear end 28.Selectable rod end such as can have circle Groove or cannelure, under those circumstances, when instrument 4 moves axially, locking body 25 always by Mobile.

Locking sleeve 30 is enclosed within above receiving sleeve 20 and locking body 25.Locking sleeve 30 Radially inner inner face 31 is adjacent to locking body 25, stops these locking bodies whereby from cavity 21 Remove.Therefore the instrument 4 inserted locks by means of locking body 25 and locking sleeve 30.Locking Sleeve 30 can overcome the reset force of one or more spring 32 to be axially displaced, and thus adjoins Radially opening free space 33 in locking body 25, locking body 25 is in order to from cavity 21 In remove and can be displaced in this free space.User can be indirectly by caning oneself from the outside Locking sleeve 30 is moved by the manipulation sleeve 34 got at.Locking sleeve 30 is around axis of operation 10 Rotatably support.Particularly locking sleeve 30 can rotate around accommodating sleeve 20.Preferably lock Tight sleeve 30 can be freely rotatable in handling sleeve 34, and does not drive this manipulation sleeve.

Fig. 5 and Fig. 6 illustrates that locking sleeve 30 is in contrast to the top view of impact direction 11 with flat Cross section in the VI-VI of face.Inner face 31 is provided with spiral chute 40, embedding in this chute Enter locking body 25.Chute 40 is such as consisted of groove 41, and this groove has along the circumferential direction 24 Leading side 42 and side 43 subsequently.Two sides 42,43 can be hull shape, example As having the cross section of the circular arc being perpendicular to axis of operation 10.The shape of groove 41 groove in other words Wall imitates locking body 25, i.e. groove 41 being perpendicular to the profile cuing open in plane of axis of operation 10 The profile graphics of a part for the locking body 25 that shape is congruent in embedded groove 41.The section of groove 41 Figure is part circle preferably for spherical locking body 25.In locking body 25 embedded groove 41, and And along the circumferential direction 24 the most in the clockwise direction but also in the counterclockwise direction, this locking body Motion in the plane being perpendicular to axis of operation 10 is blocked.

Chute 40 or groove 41 helically wind around axis of operation 10.The spiral of chute 40 Angle 44, i.e. chute 40 are preferably at 65 ° relative to the inclination angle of the plane being perpendicular to axis of operation 10 And in the range of between 85 °, such as between 75 ° and 82 °.Groove 41 is relative to axis of operation In the range of the lift angle 45 of 10 is correspondingly preferably between 5 ° and 25 °, such as at 8 ° and 15 ° Between, this lift angle determines along the face of cylinder around axis of operation 10.Chute 40 is preferably around work Make a part for 10, axis winding one whole circle, such as between the 1/20 to 1/10 of a whole circle. The front end 46 along impact direction 11 of chute 40 relative to chute 40 along impact direction 11 Rear end 47 to arrange in the angle 48 rotated around axis of operation 10 between 5 ° and 25 °, preferably edge Impact direction 11 is observed counterclockwise.Chute 40 this chute along axis of operation 10 full-scale on Extend around axis of operation 10 with identical turning to, turn to the change along axis of operation 10 to be not provided with. Groove 41 can also serve as the crow flies and be parallel to longitudinal axis 49 orienting approx.Longitudinal axis 49 The longitudinal axis 49 being inclined to axis of operation 10, i.e. groove 41 had both been not parallel to axis of operation 10, and And longitudinal axis 49 is the most non-intersect with axis of operation 10.

Although arranging with different Angle Position about axis of operation 10, groove 41 be perpendicular to work The profile graphics of axis preferably congruence.Locking body 25 is forced along groove 41 to guide constantly. Locking body preferably continued contacts leading side 42 and side subsequently along groove 41 when moving 43, described side has constant spacing 50.Due to the spiral or side 42,43 of deflection Groove 41 in other words, chute 40 force the locking body 25 moved along axis of operation 10 do relative to The relative rotary motion around axis of operation 10 of locking sleeve 30.

In shown form of implementation, chute 40 is on the leading edge 51 of inner face 31 or lock sleeve Start on the front end face 52 of cylinder 30.Locking body 25 is (Fig. 2) on the home position of this locking body Typically close to leading edge 51 and therefore it is halved together with chute 40.Spring on front end face 52 Load annular disk 53 stop locking body 25 in contrast to impact direction 11 from locking sleeve 30 Exit and therefore exit from the interlocking of chute 40.Annular disk 53 in radial directions with lock Tight body 25 is overlapping.Due to the interlocking on home position, hand held power machine boring or In the operating process of Drilling, locking sleeve 30 rotates jointly with accommodating sleeve 20.

Chute 40 along the size 54 of axis of operation 10 than locking body 25 along the chi of axis of operation 10 Very little 55 to the youthful and the elderly 50% or to the youthful and the elderly 0.5cm.The length 54 of chute 40 is such as in 0.5cm And in the range of between 2cm.Chute 40 can extend in the total length of locking sleeve 30.

When the no-load percussion of instrument 4, instrument 4 removes tool collet along axis of operation 10 2, until locking body 25 touches on the rear end 28 of elongated hole 23 (Fig. 3).Locking body 25 is at this To impact direction 11 along axis of operation 10, such as from the end or front of the instrument pusher side of elongated hole 23 End 27 moves to the end of the tool side of elongated hole 23 or rear end 28.Follow the axle of locking body 25 To motion, locking sleeve 30 is forced to turn about axis of operation 10 rotates due to chute 40.Instrument 4 The rotational being changed into locking sleeve 30 at least partially of kinetic energy.Locking sleeve 30 is Spinning up in one direction of rotation, this direction of rotation is made a reservation for by chute 40.First direction of rotation Exemplarily looking towards impact direction 11 is counterclockwise, logical equal to rig or Drilling head 4 Normal direction of rotation.

Typically, instrument 4 rebounds and in contrast to impact direction 11 on stopper section below Return movement, this stopper section is such as consisted of the rear end 28 of elongated hole 23.This return movement is also The locking sleeve 30 by rotating is not supported, on the contrary, the locking sleeve 30 rotated is braked Instrument 4.Reason is handedness or the chirality of chute 40, and this chute is at locking body 25 return movement time be forced in contrast to the first direction of rotation second direction of rotation rotate.Work Tool 4 promptly loses kinetic energy and is preferably parked near stopper section below.Locking sleeve 30 Rotational can be by friction, such as in the friction handled on sleeve 34 or by user Contrary torque is led away.

Locking sleeve 30 preferably can not be moved along axis of operation 10 by the power applied by instrument 4. Shown locking sleeve 30 is adjacent to stopper section along impact direction 11.Spring 32 is along impact direction 11 apply power, and this power is more than the axial component of the power being passed to chute 40 by locking body 25.

Fig. 7 and Fig. 8 illustrates that tool collet 2 is on home position and when no-load percussion Form of implementation, Fig. 9 is shown in the cross section in plane IX-IX.Figure 10 illustrates that dress received by instrument Put the locking sleeve 60 of 2 profile along axis of operation 10.

On the inner face 61 of axis of operation 10, locking body 60 has multiple at axis of operation The radially prominent rib 62 of 10, the such as rib 62 between 6 and 10.Rib 62 the most along the circumferential direction 24 are uniformly distributed, and arrange with identical angular separation 63.Each two is adjacent Near rib 62 limits the recess 64 of similar groove, and this recess can guide locking as chute 65 Body 25.So select angular separation 63, make locking body 25 contact along the circumferential direction 24 the most simultaneously Lead over this locking body and along the circumferential direction 24 subsequently in the rib 62 of this locking body.Locking Body 25 embeds in chute 65, is stopped in the move in plane being perpendicular to axis of operation 10.Rib Bar 62 is inclined to axis of operation 10 ground or helically winds around axis of operation 10.Relative to In the range of the inclination angle 45 of axis of operation 10 is between 5 ° and 25 °, such as at 8 ° and 15 ° Between.

Inclination angle 45 can be gradually increased along impact direction 11.The particularly previous section of chute 65 Can have the lift angle between 1 ° and 5 °, and aft section tilts between 8 ° and 15 °.

Rib 62 only extends along axis of operation 10 on the Part I 66 of inner face 61.At rib In contrast to impact direction 11, and then there is smooth cylindrical inner surface on bar 62 or chute 65 The Part II 67 of 68, this inner surface is concentric with axis of operation 10.Cylindrical form interior surface 68 can To be adjacent to locking body 25.The axial dimension of cylindrical form interior surface 68 is preferably approximately equal to or than lock Tight body 25 is along the size 70 big less than 50% of axis of operation 10.If whole locking body 25 Overlapping along axis of operation 10 with cylindrical form interior surface 68, then locking sleeve 60 can be around working shaft Line 10 is freely rotatable.

Figure 11 illustrates the profilograph of a kind of form of implementation of tool collet 2；Figure 12 shows Go out the partial enlarged drawing of Figure 11.Tool collet 2 includes accommodating sleeve 20, this receiving set Cylinder has two elongated holes 23 preferably with respect to axis of operation 10 symmetry.Each elongated hole 23 divides Not Qian Ru locking body 25,71, described locking body radially inwardly and radially outwardly protrude from receiving set Cylinder 20.Locking sleeve 80 has the inner face 81 towards axis of operation 10, and this inner faces contact is locked Body 25.

Figure 13 illustrates the cross section intercepted along plane XIII-XIII of locking sleeve 80, Figure 14 With Figure 15 illustrate locking sleeve 80 in same plane XIV-XIV, XV-XV to contrary line of vision Profilograph.Figure 16 simplifies the inner face 81 illustrated in contrast to rotation direction 24 expansion.Horizontal seat The numeral explanation put on is about the exemplary position, angle in units of degree of elective zero point Put.

Deflection or spiral chute 40 constructs on inner face 81, embeds the in this chute One locking body 25.Chute 40 such as can construct as describe above in association with Fig. 5 and 6. Chute 40 can have such as deflection or spiral groove 41 on inner face 81.Groove 41 Along the circumferential direction 24 leading sides 42 and along the circumferential direction 24 sides 43 subsequently be deflection Or spiral.The spacing 50 of two sides 42,43 preferably keeps not along axis of operation 10 Become.Spacing 50 is chosen to, and makes locking body 25 guide with inlaying between two sides 42,43, I.e. locking body not only contacts leading side 42 but also contacts side 43 subsequently.

Groove 41 has such shape being suitable for locking body 25, i.e. locking body 25 and is being perpendicular to Inlayed towards with in contrast to circumferencial direction 24 by chute 41 in the plane of axis of operation 10.Hanging down Straight in the cross section of axis of operation 10, groove 41 such as can have the shape of part circle, should The radius of part circle is equal to the radius of spherical locking body 25.In preferred form of implementation, groove 41 start on the front end 82 of locking sleeve 80.Groove 41 is along the size 54 of axis of operation 10 Than locking body 25 along the size of axis of operation 10 big at least 50%.

Locking sleeve 80 is radially adjacent to the second locking body 71, in order to stop this second lock Tight body is removed from cavity 21.Being different from the first locking body 25, the second locking body 71 is circumferentially Direction 24 is not inlayed by locking sleeve 80.Locking sleeve 80 is relative to the second locking body 71 It is possible around relatively rotating of axis of operation 10.

The exemplary form of implementation of locking sleeve 80 has wide space 83 on inner face 81. Leading side 84 and side 85 the most subsequently can be parallel to work Make axis 10.The angle according to locking body 25,71 is arranged relative to the angle of groove 41 in space 83 Degree is arranged, is i.e. selected according to the angle layout of the elongated hole 23 of these locking bodies.In this embodiment Middle locking body 25,71 is to be opposed to, with the first angle 86 layout equal to 180 °.Space 83 are opposite to groove 41, i.e. rotate the first angle 86 ground cloth relative to groove 41 around axis of operation 10 Put.

As it has been described above, when the first locking body 25 moves along axis of operation 10, locking sleeve 80 Rotate.Wide space 83 is configured to so that the side 84,85 in this space is not occupied any Turned position on contact the second locking body 71.The leading side 84 in space 83 is with at least Two angles 87 are away from, preferably big than the first angle 86 10 ° of this second angle.Shown in Figure 16 Example in, this spacing is 200 °.The side 85 subsequently in space 83 is at most with third angle 88 away from the side 43 subsequently of groove 41, and this third angle is preferably little than the first angle 10 °, See example with 165 ° away from.

Space 83 along the circumferential direction 24 size 89 more than angle 48 (groove 41 with this angle around Axis of operation 10 winds) with groove 41 along the circumferential direction 24 the summation of size 50.Space 83 It is wider than the groove 41 projection in the plane being perpendicular to axis of operation 10, the widest at least 20 °.

Space 83 is preferably equal to chute 40 along axis of operation 10 along the size 90 of axis of operation 10 Size 54.On the first locking body 25 and the edge of the second locking body caused by no-load percussion During the common linear motion of axis of operation 10, the first locking body 25 forces locking sleeve 80 Rotate, and the second locking body does not has towards or applies force to locking sleeve in contrast to circumferencial direction 24 On 80.Space 83 along the circumferential direction 24 has enough gaps, thus the edge in this space or Side the 84,85 and second locking body keeps spacing when locking sleeve 80 rotates.

Chute 40 should be added by the locking body 25 moved along axis of operation 10 when no-load percussion Rapid-result rotary motion, is used for consuming kinetic energy.When the instrument 4 of installing or removing, locking body 25 is same Move along axis of operation 10, but make locking sleeve 80 rotate as far as possible no consumption.

Disengagable chute locking device 100 is in the position blocks locked or prevents locking sleeve 80 Move along axis of operation 10, and can allow for locking sleeve 80 axially move in the position unlocked Dynamic.In latter position, chute 40 can move with locking body 25 simultaneously, and this chute It is not forced to do relative rotary motion.

Disengagable chute locking device 100 engages with handling sleeve 34.When user moves behaviour Vertical sleeve 34, so that during taking off tool 4, moves in contrast to impact direction 11 in the example shown This manipulation sleeve, then chute locking device 100 unlocks.If handling sleeve 34 to be in for locking The position of clamping tool 4, then chute locking device 100 is on its locked position equally.

Exemplary disengagable chute locking device 100 includes one or more spring 32, institute State spring and locking sleeve 80 is pressed to stopper section to impact direction 11.Such as dust seal 101 Constitute this stopper section.Preferably stopper section is line with rubber, in order to produce the high friction of locking sleeve 80. Spring 32 is designed to, and makes the spring force of this spring more than in operation by locking sleeve 80 The power that one side applies along axis of operation 10.As long as user does not intervenes, locking sleeve 80 is along work Make axis 10 and there is fixing position.

Chute locking device 100 has the coupling element of rigidity, and this coupling element is at spring 32 And it is linked in load path between locking sleeve 80.On the home position of locking, coupling unit The power acted on to impact direction 11 of spring 32 is passed to locking sleeve 80 by part.For unlocking Position, coupling element can depart from locking sleeve 80, in order to interrupt load path.Coupling The disengaging of element and locking sleeve 80 realizes by handling sleeve, this manipulation sleeve by mobile or Rotate and with coupling element, interlocking occurs and coupling element can be driven.

Exemplary coupling element is annular disk 53.This annular disk 53 has in contrast to impact side To 11 sides pointed to, spring 32 is adjacent on this side.Point to the side of impact direction 11 115 have two regions 116,117.First area 116 is adjacent to lock sleeve on home position Cylinder 80.The power passing to annular disk 53 from spring 32 is transmitted to locking sleeve along impact direction 11 80.Second area 117 is opposite to handle the drivening piece 118 of sleeve 34 along impact direction 11. This drivening piece 118 can be such as by maybe passing through with the manipulation separate spacer sleeve of sleeve In locking manner or the protuberance that is connected cohesively together of material is constituted with handling sleeve 34 shape.At annular disk Preferably there is on home position small air gap 119, in order to really between 53 and drivening piece 118 The incoming locking sleeve of power 80 of guarantor's spring 32, and the most incoming manipulation sleeve 34.When user phase Anti-when impact direction 11 mobile operating sleeve 34, such as when taking off tool 4, drivening piece 118 move annular disk 53 in contrast to impact direction 11.The power of spring 32 is now by annular disk 53 incoming manipulation sleeves 34, locking sleeve 80 does not stresses.The braking of locking sleeve 80 is made With being reduced or eliminated.Handle sleeve 34 and locking sleeve 80 is preferably faint along axis of operation 10 Ground engages, particularly compared with the power of spring 32.

Coupling unit that is that manipulation sleeve 34 can be the replacement of chute locking device 100 or that supplement Part.Handle the radially protruding part 102 of such as annular of sleeve 34 in the side towards spring 32 On be applied to the radially protruding part 103 of locking sleeve 80 from behind.Handle the sensing of sleeve 34 The surface 104 of impact direction 11 be adjacent to locking sleeve 80 in contrast to impact direction 11 point to Surface 105.The spring force of spring 32 passes to locking sleeve 80 by handling sleeve 34.So As long as and user is in contrast to impact direction 11 mobile operating sleeve 34, then power stream is interrupted also And locking sleeve 80 and spring 32 uncoupling.

Handle sleeve 34 and locking sleeve 80 can be by the slinky spring of chute locking device 100 106 engage.Slinky spring 106 resists handles sleeve 34 to impact direction 11 relative to locking The relative movement of sleeve 80.Slinky spring 106 preferably compression spring, it is along axis of operation 10 Arrange in load path between sleeve 34 and locking sleeve 80 handling.Dress is received at instrument Putting on the home position of 2, slinky spring preferably relaxes.

Slinky spring 106 is arranged on the stopper section 109 pointing to impact direction 11 of locking sleeve 80 And handle between the stopper section 108 in contrast to impact direction 11 sensing of sleeve 34.The two Stopper section 108,109 e.g. ring, they are relative to handling sleeve 34 and locking sleeve 80 It is axial restraint, but can be around axis of operation 10 relative to manipulation sleeve 34 and locking sleeve 80 Rotate.Ring 109 can be such as to insert the bail wire in the cannelure in locking sleeve 80.? In shown example, at manipulation sleeve 34 during home position, in slinky spring 106 and backstop Air gap 107 can be there is between one of portion 108,109.The spring constant of slinky spring 106 is preferred Less than the elastic force of spring 32 1/5th.Slinky spring 106 can be helical spring or elastomer Ring.Locking sleeve 80 moves along axis of operation 10 when replacing, particularly taking off tool 4, And only it is forced to rotate motion in the range of less circumferential angle.When user in contrast to During impact direction 11 mobile operating sleeve 34, slinky spring 106 drives locking sleeve 80.Freely Space 33 moves up in the side of elongated hole 23, and locking body 25 can be radially in order to discharge rod end 3 Avoid to this free space.

Chute locking device 100 the most exemplarily combines locking sleeve 80 and describes, and can also In other form of implementation of tool collet 2.

Figure 17 illustrates the receiving sleeve 110, Figure 18 of another form of implementation of tool collet 2 Part sectioned view along axis of operation 10 is shown.Accommodate sleeve 110 and there is one or more elongated hole 111, described elongated hole embeds locking body 25.Locking body 25 is advanced by leaps and bounds and is accommodated the rib of sleeve 110 In the cavity 21 of cylindricality or cylinder, in order to the instrument 4 inserted with locking slot locking.Locking body 25 have the size less than elongated hole 111 along axis of operation 10, and therefore can be along work Axis 10 moves in elongated hole 111.Elongated hole 111 constitutes chute 120 for locking body 25.

At least some of of elongated hole 111 winds around axis of operation 10 spirality.Elongated hole 111 Along the rear end 121 of impact direction 11 relative to the front end 122 along impact direction 11 around working shaft Line 10 is arranged rotationally.Preferably elongated hole 111 is looked rotate in an anti-clockwise direction towards impact direction 11. In the part of the winding of chute 120, locking is made moving to impact direction 11 once instrument 4 Body 25 moves, then instrument 4 is forced to rotate around axis of operation 10.Rotary motion stops instrument 4 move locking body 25 by the chute 120 of winding in contrast to impact direction 11.Instrument 4 is at sky Carry the difficulty increase of the later recoil of impact.

Tool collet 2 has short or that drive not used for rotation, for implementation tool 4 ribs 22 rotated around axis of operation 10.Preferably by rib 22 along the size of axis of operation 10 Determine into so that instrument 4 start along axis of operation 10 drive locking body 25 time, rod end 3 from Open the interlocking of rib 22.Rib 22 such as can be arranged along axis of operation 10 and elongated hole with staggering.

Above-mentioned each form of implementation can also combine.Tool collet 2 is possible not only to have and includes The elongated hole 111 of spiral chute 120, and permissible on the inner face 81 of locking sleeve 80 There is spiral chute 40.

Claims (10)

1. the tool collet of the toolroom machine worked for dental formulas, described tool collet bag Include: be concentric with the receiving sleeve (20,110) that axis of operation (10) is arranged, in order to accommodate work The rod end (3) with at least one locking slot (29) of tool (4)；At least one locking body (25), This locking body is partly advanced by leaps and bounds in receiving sleeve (20,110), in order to embed described at least one In locking slot (29), and this locking physical ability is moved along axis of operation (10)；Chute (40, 65,120), guiding locking body (25) in this chute, this chute (40,65,120) has There is spiral that is that wind or that be inclined to axis of operation (10) around axis of operation (10) spirality Shape part (41).

2. according to the tool collet of claim 1, it is characterised in that locking sleeve (30, 60,80) described to be radially directed towards inner face (31,61, the 81) contact of axis of operation (10) At least one locking body (25), and described chute constitutes on this inner face.

3. according to the tool collet of claim 2, it is characterised in that locking sleeve (30, 60) rotatably support around axis of operation (10).

4. according to the tool collet of one of claims 1 to 3, it is characterised in that described The spiral section of chute (40,65,120) has relative to axis of operation (10) at 5 ° And the lift angle (45) between 25 °.

5. according to the tool collet of one of claims 1 to 3, it is characterised in that described Locking body (25) along the circumferential direction (24) and in contrast to circumferencial direction (24) be adjacent to chute (40, 65、120)。

6. according to the tool collet of Claims 2 or 3, it is characterised in that locking sleeve (80) having space (83) on inner face, other locking body (71) is advanced by leaps and bounds in this space, The size (89) in this space (83) along the circumferential direction (24) is more than chute (40) circumferentially The size (50) in direction (24).

7. according to the tool collet of claim 6, it is characterised in that described space (83) There is the side (84,85) being parallel to axis of operation (10), and chute (40) has phase For axis of operation (10) deflection or around the side (42,43) that axis of operation (10) winds.

8. according to the tool collet of Claims 2 or 3, it is characterised in that have and can take off The chute locking device (100) opened, this chute locking device on locked position by means of spring (32) apply force on chute (40,65) as land used to impact direction (1), and this is sliding Groove locking device makes spring (32) and chute (40,65) uncoupling on unlocked position.

9. according to the tool collet of claim 8, it is characterised in that described chute is locked Device (100) has described spring (32) and has coupling element (53,102), this coupling Close element (53,102) and pass through described spring (32) to impact direction (11) towards lock sleeve Cylinder (30,60,80) is applied in power, manipulation sleeve (34) energy of tool collet (2) Move relative to locking sleeve (30,60,80) in contrast to impact direction (11), and should Handle sleeve be connected with coupling element (102) or be bearing in coupling in contrast to impact direction (11) On element (53).

10. according to the tool collet of Claims 2 or 3, it is characterised in that described appearance Sleeve (110) of receiving has at least one elongated hole (111), in this elongated hole insert described at least one Individual locking body (25), this elongated hole (111) spirality at least in part is around axis of operation (10) Winding.