CN101058178A

CN101058178A - Drilling and / or hammering tool

Info

Publication number: CN101058178A
Application number: CNA2007100936736A
Authority: CN
Inventors: 阿希姆·布赫霍尔茨; 拉尔夫·伯恩哈特; R·赫廷
Original assignee: Black and Decker Inc
Current assignee: Black and Decker Inc
Priority date: 2001-10-26
Filing date: 2002-10-25
Publication date: 2007-10-24
Anticipated expiration: 2022-10-25
Also published as: ATE502721T1; AU2002357469B2; DE60239004D1; DE60239553D1; CN100366398C; EP1849562A2; AU2002350626B2; CN1735485A; GB0214774D0; CN101633056A; EP1619000B1; CN101058178B; GB0211184D0; GB2381228A; GB0125749D0; EP1619000A1; EP1849562A3; CN101633056B; ATE495858T1

Abstract

The invention provides a drilling and/or hammering tool, comprising a hollow main shaft (1) and a tool chuck (10) which can be connected with the end (18) of the main shaft and can be taken out of the end. The tool chuck comprises a tool chuck main body (14) which can be arranged in the end of the main shaft and can be locked in the end in a releasable way through at least a locking part (32), and a locking ring (42) which keeps the locking part or all locking parts at locking positions where the tool chuck is locked on the main shaft by the locking part in a releasable way. The locking ring (42) is provided with the internal radius which is changed along the circumference; therefore, the rotation of the locking ring round the axis line of the tool chuck main body leads the locking ring to move between the locking position and a releasing position; in the locking position, the locking part or all locking parts (32) can clamp the tool chuck main body in the main shaft; in the releasing position, the locking part or all locking parts can release the tool chuck main body by radial motion.

Description

Boring and/or fullering tool

Technical field

The application is the dividing an application of patent application CN02825595.X that is entitled as " boring and/or fullering tool ".

The present invention relates to boring and/or fullering tool, relate in particular to hammer and electric hammer, and the hammer that is used for this instrument.

Background technology

This instrument generally includes the main shaft that comes rotary driving by motor, and hammer mechanism such as air-cushion type hammer mechanism, and it is used for clashing into repeatedly the instrument by the hammer clamping.The shank of instrument such as drill bit or cutter head is clamped on the instrument by hammer, and the instrument that makes can axially slide several centimetres in hammer under the effect of hammer mechanism.In a kind of well-known design of selling with model SDS Plus, tool shank has the groove that pair of end portions is opened wide, it is used for holding the spline of the hammer that makes the instrument rotation, and the groove of pair of end portions sealing, it is used for holding the locking piece of hammer, and this locking piece can limit the scope of the axially-movable of instrument in hammer.Hammer can for example utilize in axial sliding parts to come the artificially to handle by the operator, therefrom discharges so that instrument remained on wherein and with instrument.

In addition, hammer itself usually needs and can discharge from main shaft, so that for example will be with dissimilar tool holdings can change in hammer the time.In this case, tool holder body or main shaft are provided with one or more locking pieces, for example lock ball, their (for the axis of main shaft) motions diametrically to be being clamped in tool holder body on the main shaft, or allow therefrom to discharge tool holder body.

Though tool holder body is positioned on the outer surface of hammer main shaft usually, yet for example at patent GB-A-2313566 (corresponding to patent DE-A-19621610) with propose in patent US-A-5437465, tool holder body can be inserted in the end of main shaft.The advantage of this design is, owing to be used for holding the endoporus of hammer of tool shank and the endoporus of main shaft can be piled up in the axial direction, therefore can reduce the length of instrument significantly.Be positioned in original design of main shaft exterior circumferential at hammer, the endoporus of hammer only originates in a certain position outside the front-end of spindle.

Yet these designs of hammer all have many shortcomings.For example, in the hammer that patent GB-A-2313566 is introduced, the user is difficult in the correct axial location that finds hammer on the main shaft with the hammer locking thereon, that is to say that very difficult assurance is positioned at the corresponding part that being used on locking piece and the hammer on the main shaft hold locking piece and upwards aligns in week.In other cases, produce axially-movable with the releasing tool shank or be fixed under the situation in the hammer at the parts that need hammer, for it is discharged from main shaft, the axially-movable meeting of hammer parts causes difficulty.For example, ring on hammer or skirt section must axially travel forward so that hammer is discharged from main shaft, the user holds hammer with their hand along the axis of hammer usually, and with hand extruding with releasing tool chuck (so its palm has applied newton's reaction force to the front end of hammer).This may make hammer unscrew the tool shank that is held on wherein in taking off the process of hammer, and therefore when the hammer on the replacing main shaft, in case hammer is actuated, instrument will be ejected from hammer.Perhaps, hammer may be inserted improperly, and therefore hammer just is ejected when actuating hammer.On the other hand, in the device that patent US-A-5437465 is introduced, must axially mobile backward ring so that hammer is taken out from main shaft, therefore take out hammer and necessarily require the operator to make with the hands to reach this purpose.

Summary of the invention

According to a first aspect of the invention, provide a kind of hammering and/or boring bar tool, it comprises the main shaft of hollow and the hammer that can be connected on the spindle nose and therefrom take off, and described hammer comprises:

Tool holder body, it can be installed in the end of main shaft and be locked in releasedly wherein by at least one locking piece; With

Locking ring, it can remain on latched position releasedly with this locking piece or each locking piece, and locking piece is locked in hammer on the main shaft in this position,

It is characterized in that this hammer comprises: the sleeve that can manually actuate, it can be rotated in a first direction locking ring and along opposite second direction turning tool clamper main body; And the elastic component that links to each other with tool holder body with locking ring, it can promote tool holder body and accompany or follow locking ring moving along first direction, and promote locking ring and accompany or follow tool holder body moving along second direction, wherein, this sleeve that can manually actuate causes locking ring to rotate along same direction along the rotation of first direction, and elastic component promotes tool holder body and rotates to locking ring wherein discharges locking piece or each locking piece from latched position position, and this sleeve that can manually actuate causes tool holder body to be rotated along same direction along the rotation of second direction, and elastic component promotes locking ring and rotates to locking ring wherein locking piece or each locking piece are remained on position in the latched position.

The locking of this hammer and release setting can be fixed on hammer on the main shaft reliably, and can fast and easily hammer be taken off from main shaft, and change this hammer or another hammer fast and easily on main shaft.And, hammer is fixed in the same manually-operated on the main shaft, can relatively easily on main shaft, find the correct initial position of rotation of hammer at the sleeve that can manually actuate of rotation.

In one embodiment, locking ring can by sleeve along first direction, be preferably clockwise direction and rotate, thereby hammer is discharged from main shaft, and tool holder body can by sleeve along opposite second direction, be preferably and counterclockwise rotate, thereby hammer is locked on the main shaft.Locking piece can be installed in the end of main shaft, thereby can move diametrically.This sleeve that can manually actuate can come the throw clamper main body by the part that is nonrotatably mounted tO on the tool holder body.

The sleeve that can manually actuate can be installed into and can rotate with respect to locking ring and tool holder body limitedly.Particularly, the sleeve that can manually actuate can be installed into and can rotate along first direction with respect to tool holder body limitedly, and/or can be installed into and can rotate along second direction with respect to locking ring limitedly.

Elastic component can be a wind spring, and its first end is fixed on the locking ring, and the second end is fixed on the above-mentioned part.

In an embodiment of first aspect present invention, the hammer part can have the groove that is used for each locking piece, and locking ring has the groove that is used to hold each locking piece, wherein the locking ring groove has than the deep branch with than shallow portion, they are arranged to when aliging with locking piece than the deep branch, locking piece can move out from tool holder recesses, and hammer can take out from main shaft or be installed on the main shaft, and when aliging with locking piece than shallow portion, locking piece is locked in the corresponding tool holder recesses, and hammer is fixed on the main shaft.Each tool holder recesses can be formed in the surface radially outward of hammer, each locking ring groove can be formed on locking ring radially in inner surface.

A first aspect of the present invention also provides a kind of hammer, and it can be connected on the end of the boring and/or the main shaft of fullering tool and therefrom take off, and this hammer comprises:

Tool holder body, its can by at least one locking piece be installed on the end of main shaft and locking releasedly thereon; With

Locking ring, it can remain on latched position releasedly with this locking piece or each locking piece, wherein locking piece is locked in hammer on the main shaft, it is characterized in that, this hammer comprises: the sleeve that can manually actuate, and it can be rotated in a first direction locking ring and along opposite second direction turning tool clamper main body; And the elastic component that links to each other with tool holder body with locking ring, it can promote tool holder body and accompany or follow locking ring moving along first direction, and promote locking ring and accompany or follow tool holder body moving along second direction, wherein, this sleeve that can manually actuate causes locking ring to rotate along same direction along the rotation of first direction, and elastic component promotes tool holder body and rotates to locking ring wherein discharges locking piece or each locking piece from latched position position, and this sleeve that can manually actuate causes tool holder body to be rotated along same direction along the rotation of second direction, and elastic component promotes locking ring and rotates to locking ring wherein locking piece or each locking piece are remained on position in the latched position.

Can have and hammering and/or the relevant miscellaneous function of boring bar tool according to the hammer of first aspect present invention according to first aspect present invention.

Boring and/or fullering tool according to second aspect present invention are characterised in that, locking ring has the inside radius along its circumferential variation, therefore locking ring will make it move between latched position and off-position around the rotation of tool holder body axis, in latched position, can cause this locking piece or each locking piece that tool holder body is clamped in the main shaft, and in the off-position, allow this locking piece or each locking piece radially to move with the releasing tool clamper main body.

Therefore, because the locking of hammer relates to the rotation of locking ring, therefore in same manually-operated, find hammer to locate with respect to the correct angle of main shaft than being easier to.In addition, than being easier to instrument being unclamped from hammer and the motion that hammer discharges from main shaft is arranged to betide mutually orthogonal direction of each parts of hammer, so these two operations can not interfered mutually.

In the opening that this locking piece or each locking piece one of are usually located in main shaft or the tool holder body, and can engage with another the recess in main shaft or the tool holder body, thereby tool holder body is clamped on the main shaft, therefore, only when tool holder body was in the orientation of regulation with respect to main-shaft axis, tool holder body just was clamped in the main shaft.In most of the cases, this locking piece or each locking piece will be positioned at the opening of main shaft, and be in it at it and radially engage with the recess of tool holder body (being inserted in the main shaft) during inner side, thereby tool holder body is clamped on the main shaft.

Hammer can comprise manually operable sleeve, and it is associated with locking ring, so as the user can be between latched position and off-position the twist-lock ring.In this case, locking ring can have the bigger zone of inside radius that has formed depression, it can hold locking piece (so that energy releasing tool clamper main body) when locking piece is in the outermost radial outside position, locking ring also has the less zone of inside radius, and it only holds locking piece when locking piece is in the radially inner side position that can engage with recess.In this is provided with, locking ring can biased with respect to tool holder body (normally fexible bias pressure) in its latched position.Therefore, for example no matter whether hammer is positioned on the main shaft, and locking ring all can be biased, makes the small radii zone of locking ring align at the recess that has held locking piece that makes progress in week with on the tool holder body.

A second aspect of the present invention also provides a kind of hammer, it can be connected on the end of the boring and/or the main shaft of fullering tool and therefrom take off, this hammer comprises tool holder body, it can be inserted in the spindle nose, but and be clamped in wherein by at least one locking piece of radial motion, so that clamping or permission releasing tool clamper main body, also include locking ring, it is used for this locking piece or each locking piece are remained on the position that tool holder body can be clamped on the main shaft, it is characterized in that, locking ring has the inside radius along its circumferential variation, therefore locking ring will make it move between latched position and off-position around the rotation of tool holder body axis, in latched position, can cause this locking piece or each locking piece that tool holder body is clamped in the main shaft, and in the off-position, allow this locking piece or each locking piece radially to move with the releasing tool clamper main body.

Can have and hammering and/or the relevant miscellaneous function of boring bar tool according to the hammer of second aspect present invention according to second aspect present invention.

As mentioned above, aspect two of the present invention in, manually operable sleeve can also rotate with respect to tool holder body limited extent ground with respect to locking ring limited extent ground rotation.Therefore, in this case, the bias effect that locking ring can overcome spring by the sleeve of artificially operation is maintained in its latched position (perhaps more precisely, locking ring and tool holder body are maintained each other, make locking ring be in its latched position), sleeve is provided with the ratchet of some forms to limit further rotation.The rotation of manually operable sleeve on a direction (clockwise or counter clockwise direction) is configured to cause tool holder body to produce corresponding rotation, but allow locking ring to keep static (with respect to main shaft), yet, the rotation in the opposite direction of manually operable sleeve is configured to require locking ring correspondingly to rotate, but allows tool holder body to keep static.In this set, tool holder body can be inserted in the spindle nose, make this locking piece or each locking piece be in its outermost radial outside position, and be contained in the depression of locking ring, sleeve artificial rotation in one direction causes tool holder body with respect to main axis rotation, but can prevent that by this locking piece or each locking piece locking ring is with respect to main axis rotation, up to this recess or each recess week upwards with till locking piece aligns, at this moment, this locking piece or each locking piece will radially inwardly move in its recess, allow locking ring to rotate to its latched position under bias effect.This rotation of locking ring is attended by the clear click of listening usually, and this just reminds operator's hammer correctly to engage and be in the lock state down with main shaft.For hammer is taken off from main shaft, can center on main shaft artificially rotational sleeve in opposite direction, this just makes locking ring and overcomes the spring bias voltage with sleeve and rotate, up to this locking piece or each locking piece with till the depression of locking ring aligns, at this moment, this locking piece or each locking piece will move radially outwardly in its depression, allow to take out hammer.

Though hammer can be arranged to discharge from main shaft by twist-lock ring and/or sleeve clockwise or counterclockwise in principle, preferred (along the axis of tool holder body to coming to see) twist-lock ring and/or sleeve discharge hammer from main shaft by only along clockwise direction.This is because electric hammer is designed for this instrument and hammer are rotated in a clockwise direction.Therefore, if sleeve is run on wall or other fixed object by accident during operation, wall or other object will apply the moment of torsion of counterclockwise going up (with respect to the remainder of hammer) to sleeve, thereby hammer is remained locked in the hammer main shaft.

Description of drawings

Introduce a kind of form below with reference to the accompanying drawings and by example according to hammer of the present invention and hammer, in the drawings:

Fig. 1 is the cutaway view along the total axis of the main shaft of hammer according to the present invention and hammer and hammer;

Fig. 2 be as shown in Figure 1 hammer and the decomposition diagram of a part of main shaft;

Fig. 3 is the cutaway view along the total axis of main shaft according to the present invention and improved hammer; With

Fig. 4 is the perspective view of the manually operable sleeve of improved hammer shown in Figure 3.

The specific embodiment

Referring to accompanying drawing, the hammer that can use in combined rotary hammering mode comprises main shaft 1, it is provided with the air-cushion type hammer mechanism that comprises piston 2, and piston can be by by wobbler that the motor (not shown) drove or swing mechanism 4 and move back and forth in main shaft.The reciprocating motion of piston makes drift 6 move back and forth, and drift 6 impinges upon on the impulse member 8.Impulse member 8 clashes into the drill bit in the endoporus that is fixed on hammer 10 in a known way or cuts a hole the shank of a (not shown).

Hammer comprises removable hammer 10, and it can clamp the shank of drill bit such as hammer drill bit or cutting bit.Shown hammer 10 is designed for fixed drill bit, this drill bit has the elongated slot of pair of end portions sealing, it is used to hold locking piece, so that drill bit is fixed in the hammer, allows axially-movable to a certain degree simultaneously, drill bit also has the groove that pair of end portions is opened wide, it is used to hold the spline 12 of rotary driving, and the design of this drill bit is called " SDS Plus ", but also can adopt the hammer of other design, SDS Max for example, hexagonal shank etc.Hammer comprises the tool holder body 14 of the generally cylindrical body shape of hollow, and it has the rear end 16 in the front end 18 that can be inserted into hammer main shaft 1.Be provided with the locking ball 20 that is used for drill bit is fixed on hammer 10 in the slotted opening 22 of tool holder body 14, it remains on the position in the endoporus (and groove of any drill bit that is held) that extend into tool holder body 14 by locking ring 24.Locking ring 24 is arranged in releasing sleeve 26 in axial sliding, and this sleeve 26 can overcome the bias effect of spring 28 and move backward, moves radially outwardly in the groove 30 to allow locking ball 20, thereby can take out drill bit.

Tool holder body 14 is clamped in main shaft 1 by four locking balls 32 that are arranged in the opening 34 of main shaft wall.Opening 34 is tapered a little, drop in the endoporus of main shaft 1 so that prevent ball, and these balls remains in the opening by snap ring 36.Locking ball 32 can be diametrically limited extent ground motion between outermost radial outside position and radially inner side, allow to install and take out hammer 10 in the outermost radial outside position, in radially inner side place permission hammer is fixed on the main shaft.Tool holder body 14 has four recesses 38 on its outer surface, and it can hold locking ball 32 when hammer 10 is fixed on the main shaft.

Hammer 10 is provided with manually operable sleeve 40, and it can and accommodate locking ring 42 around the rotation of tool holder body 14 limited extent ground, and locking ring 42 is located around locking ball 32, and by being fixed in the sleeve 40 by the snap ring 43 of radial compression.Sleeve 40 also accommodates annular slab 44 (it is cut open partly to demonstrate its flanged peripheral part 45) in Fig. 2.Locking ring 42 has four peripheral protuberances 46, its can bear against in the sleeve 40 by on the relatively thick part 50 formed inner circular bead 48, so that the restriction locking ring can be with respect to the degree of sleeve rotation.Similarly, annular slab 44 has a pair of protuberance 52 at its periphery, and it can bear against on other inner circular bead 54 in the sleeve 40, so that the restriction annular slab can be with respect to the degree of sleeve rotation.Annular slab 44 has central opening 56, so that it can be located around tool holder body 14, this opening 56 has straight flange 58, and it can cooperatively interact with the flat site 60 on the tool holder body 14, thereby prevents that annular slab 44 is around the tool holder body rotation.Annular slab 44 and locking ring 42 interconnect by helical spring 62, and an end of helical spring 62 is arranged in the hole 64 of annular slab, and the other end is placed on the protuberance 46 of locking ring.Spring 62 biases annular plates 44 and locking ring 42, thereby limit their rotations in sleeve 40, that is to say that

protuberance

46 and 52 bears against on the inner

circular bead

48 and 54 in the sleeve, make locking ring 42 and tool holder body 14 be merely able to overcome the bias voltage of spring 62 and the rotation of relative sleeve.

Locking ring 42 has irregular inner surface, and this inner surface has the zone 66 of four thicker (being that inside radius is less), and they are separated by four grooves 68.Groove 68 itself all has a darker part 70 and an adjacent more shallow part 72.Groove divide 70 depression is provided than the deep, even be on its outermost radial outside position to allow to connect and when taking off hammer 10 at locking ball 32, this depression also can hold locking ball 32, however groove 68 can only when locking ball 32 is on its radially inner side, hold locking ball 32 than shallow portion 72.No matter which position locking ball 32 is in, thicker zone 66 all can't hold locking ball 32.

Sleeve 40, annular slab 44, locking ring 42 and tool holder body 14 be arranged so that spring 62 with locking ring be biased into its further groove 68 than shallow portion 72 week upwards with tool holder body in recess 38 positions aligning, and make the multipotency of locking ring rotate about 45 °, up to depression 70 with till recess 38 aligns.

For hammer 10 being installed on the main shaft 1 of hammer, only need hammer 10 to be shifted onto on the end 18 of main shaft simply, make the end 16 of tool holder body 14 be arranged in the endoporus of main shaft.The end of tool holder body forces locking ball 32 to move radially outwardly into its outermost locations.To cause locking ring 42 to bear against on the locking ball 32 at the further hammer 10 that promotes on the main shaft.The throw chuck 10 then, up to locking ball 32 with till depression 70 in the locking ring aligns, at this moment just can promote hammer farther in main shaft, till the rear end surface of annular slab 44 leans against on the spindle nose, and locking ball 32 be contained in the depression 70.This position is hereinafter alleged centre position.Turnbarrel 40 about 45 ° in the counterclockwise direction then, this just makes tool holder body 14 rotations by annular slab 44.Because locking ball 32 is in its outermost radial outside position, thus they can't be contained in groove 68 than in the shallow portion 72, locking ring keeps static with respect to main shaft, therefore just overcomes the bias effect of spring 62 and is rotated in a clockwise direction with respect to sleeve 40.The rotation of sleeve 40 causes tool holder body 14 rotations by annular slab 44.In case hammer 10 is around about 45 ° of main axis rotation, the recess 38 in the tool holder body 14 just aligns with locking ball 32, and the locking ball will radially inwardly move to its latched position, and here they are contained in the recess 38.The locking ball 32 this radial motion make they can be contained in locking ring 42 groove 68 than in the shallow portion 72, at this moment, locking ring will rotate to its latched position in the counterclockwise direction under the bias effect of spring 62, and be attended by the clear click of listening.Then hammer 10 is securely fixed on the end of main shaft.

In this operation, the operator needn't make hammer align with any part of main shaft.Only need be pushed in the main shaft hammer and rotation, be contained in (hammer 10 axially-movable further like this) in the depression 70 up to locking ball 32, and rotational sleeve 40 further, up to locking ring 42 is snapped onto its latched position.

For hammer 10 is taken off, only need along clockwise direction rotational sleeve 40 about 45 ° from main shaft 1.This motion forces locking ring 42 to rotate in sleeve 40, but tool holder body 14 and annular slab 44 keep static because of locking ball 32 is engaged in the recess 38.Therefore, with respect to sleeve 40 and locking ring 42, tool holder body and annular slab overcome the bias effect of spring 62 and rotate in the counterclockwise direction.When locking ring 42 is rotated into when making that locking ball 32 aligns with depression 70, locking ball 32 will move radially outwardly in the depression immediately.But just freely-movable of tool holder body 14 this moment, and will under the bias effect of spring 62, be rotated in a clockwise direction, up to protuberance 52 with till inner circular bead 54 in the sleeve 40 engages once more, this moment, recess 38 did not engage with locking ball 32, and promptly the groove in the tool holder body 38 does not align with locking ball 32.This rotation also is attended by the clear click of listening.Hammer axially can be pulled out from main shaft 1 then.

A kind of improved form that in Fig. 3 and 4, has shown hammer.Roughly the same shown in the hammer of this form and Fig. 1 and 2, but do not use snap ring 43, locking ring 42 remains on the inside of sleeve 40 by having the locating ring 100 of L shaped circumferential cross-section roughly.Locating ring 100 is provided with four alar parts 102, they can be installed in the inside of sleeve 40, and are equipped with small boss 104, and it is shown as the shape of four-headed arrow, boss 104 can be assembled in the respective aperture 106 in the sleeve wall, thereby the effective joint of locating ring 100 in sleeve 40 is provided.

Claims

1. hole and/or fullering tool for one kind, the last hammer of also therefrom taking off (10) in end (18) that it comprises the main shaft (1) of hollow and can be connected to described main shaft, described hammer has tool holder body (14), it can be inserted in the end of described main shaft, but and be clamped in wherein by at least one locking piece (32) of radial motion, so that clamping or permission discharge described tool holder body, described hammer also has locking ring (42), it is used for described locking piece or each locking piece are remained on the position that described tool holder body can be clamped on the described main shaft, it is characterized in that, described locking ring has the inside radius along its circumferential variation, therefore described locking ring will make it move between latched position and off-position around the rotation of described tool holder body axis, in described latched position, can cause described locking piece or each locking piece that described tool holder body is clamped in the described main shaft, and in described off-position, allow described locking piece or each locking piece radially to move to discharge described tool holder body.

2. instrument according to claim 1, it is characterized in that, described locking piece or each locking piece (32) are arranged in the opening (34) of one of described main shaft or tool holder body, and can engage with another the recess (38) in described main shaft or the tool holder body, thereby described tool holder body (14) is clamped in the described main shaft, therefore, only when described tool holder body was in the orientation of regulation with respect to the axis of described main shaft, described tool holder body just was clamped in the described main shaft.

3. instrument according to claim 2, it is characterized in that, described locking piece or each locking piece (32) are positioned at the opening (34) of described main shaft, and be in it at it and radially engage with recess (38) in the described tool holder body during inner side, thereby described tool holder body is clamped on the described main shaft.

4. according to claim 2 or 3 described instruments, it is characterized in that, described hammer comprises manually operable sleeve (40), it is associated with described locking ring (42), so that the user can rotate described locking ring between described latched position and off-position, described locking ring has the bigger zone of inside radius that has formed depression (70), it can hold described locking piece (to allow to discharge described tool holder body) when locking piece is in the outermost radial outside position, described locking ring also has the less zone of inside radius (72), and it only holds described locking piece when described locking piece is in the radially inner side position that engages with its recess (38).

5. according to each described instrument in the claim 1 to 4, it is characterized in that described locking ring (42) can be biased in its latched position with respect to described tool holder body.

6. according to claim 4 or 5 described instruments, it is characterized in that described manually operable sleeve (40) can rotate with respect to described locking ring limited extent ground.

7. instrument according to claim 6, it is characterized in that, described manually operable sleeve (40) can be with respect to the rotation of described tool holder body limited extent ground, and described locking ring can overcome described bias effect by described manually operable sleeve and remain in its latched position.

8. instrument according to claim 7, it is characterized in that, described tool holder body (14) can be inserted in the end of described main shaft, make described locking piece or each locking piece (32) be in its outermost radial outside position and be contained in the depression (70) of described locking ring, described sleeve (40) will cause described tool holder body (14) with respect to described main axis rotation along the artificial rotation of a direction, but described locking piece or each locking piece can prevent that described locking ring (42) is with respect to described main axis rotation, up to described recess or each recess (38) week upwards with till described locking piece aligns, at this moment, described locking piece or each locking piece will radially inwardly move in its recess, and allow described locking ring to rotate in its latched position under bias effect.

9. instrument according to claim 8, it is characterized in that, when described hammer (10) is inserted in the end of described main shaft and described locking ring (42) when being in its latched position, described sleeve (40) will cause described locking ring to overcome described bias effect with described sleeve and rotate around the artificial rotation of described main shaft in opposite direction, up to described locking piece or each locking piece with till the depression (70) of described locking ring aligns, at this moment, described locking piece or each locking piece will move radially outwardly in its depression, to allow to take out described hammer.

10. according to each described instrument in the claim 1 to 9, it is characterized in that described hammer comprises and is used for tool holding moving vertically with the part (26) that discharges described instrument but described hammer comprises the artificially in device wherein.

11. on the end that can be connected to the boring and/or the main shaft (1) of fullering tool and the hammer of therefrom taking off (10), described hammer has tool holder body (14), it can be inserted in the end of described main shaft, but and be clamped in wherein by at least one locking piece (32) of radial motion, so that clamping or permission discharge described tool holder body, described hammer also has locking ring (42), it is used for described locking piece or each locking piece are remained on the position that described tool holder body can be clamped on the described main shaft, it is characterized in that, described locking ring (42) has the inside radius along its circumferential variation, therefore described locking ring will make it move between latched position and off-position around the rotation of described tool holder body axis, in described latched position, can cause described locking piece or each locking piece that described tool holder body is clamped in the described main shaft, and in described off-position, allow described locking piece or each locking piece radially to move to discharge described tool holder body.

12. one kind is used to hole and/or the hammer of fullering tool, comprise the sleeve (40) that manually to actuate, the parts of wherein said hammer remain in the described sleeve by the snap ring (100) that is installed in the described sleeve, it is characterized in that, described snap ring has at least one elastic arm (102), described sleeve has the through hole (105) in the surface radially outward that extends to described sleeve of respective numbers, they are arranged so that described arm or each arm engage with corresponding through hole by being clasped, each arm and through hole compounding practice make the part (104) that can see from the surface radially outward of described sleeve of described arm or each arm be rendered as the shape of certain symbol.

13. hammer according to claim 12, the part of the outermost radial outside at least of described through hole or each through hole (105) forms the shape of described symbol.

14. hammer according to claim 13, the outermost radial outside of described arm or each arm (104) partly form the shape of described symbol to be assembled in the corresponding through hole.

15. hammer according to claim 12, the outermost radial outside part (104) that extends through respective through hole on described arm or each arm (104) forms the shape of described symbol.

16. according to each described hammer in the claim 12 to 15, it is characterized in that, described elastic arm or each elastic arm (102) are formed with the latch piece (104) of described symbol shape, and described latch piece is contained in by being clasped in the through hole (105) of respective shapes.

17., it is characterized in that described symbol is to have indicated the arrow that the described sleeve that can manually actuate can travel direction according to each described hammer in the claim 12 to 16.

18. according to each described hammer in the claim 12 to 17, it is characterized in that, can actuate the described sleeve that can manually actuate to be installed to instrument or drill bit on the described hammer and/or therefrom to take off.

19. according to each described hammer in the claim 12 to 17, it is characterized in that, can actuate the described sleeve that can manually actuate to be installed to described hammer on described boring and/or the fullering tool and/or therefrom to take off.