CN103846879B

CN103846879B - Power tool

Info

Publication number: CN103846879B
Application number: CN201210524420.0A
Authority: CN
Inventors: 胡广; 朱伯元
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2012-12-07
Filing date: 2012-12-07
Publication date: 2016-03-16
Anticipated expiration: 2032-12-07
Also published as: CN103846879A

Abstract

The present invention relates to a kind of electric hammer, a kind of working head can be installed, working head has hexagon profile and circumferential groove, and electric hammer comprises: housing, is positioned at the motor of housing, be positioned at the transmission mechanism of housing, produced by motor and make the chuck around an axis of operation rotary actuation through transmission mechanism, chuck comprises the sleeve holding working head, and wherein chuck comprises axial location part and shackle member, axial location part coordinates with circumferential groove, shackle member can move radially with the hexagon contoured fit of working head.Electric hammer of the present invention can utilize axial location part and the firm clamping working head of shackle member.

Description

Power tool

Technical field

The present invention relates to a kind of power tool.

Background technology

Known many hand held electric tools are particularly useful for house decoration, building industry market.These hand held electric tools or only arrange and be used for boring, screw or for hammering work, or be designed for the combination of two described work, such as, for boring with to screw or for rotary and impact type boring.The electric tool of this kind of impact hammer drill class is such as to electric hammer, electric pick etc.These electric tools all have the chuck of the front end being positioned at electric tool, for accommodating and clamping locking working head.Although known working head is applicable to the purposes of each regulation best, mostly or can only can not poorly be applicable to other objects at all.Such as working head is the situation of fluted drill, and this working head adapts to best and screws and hole, but is not suitable in stone and concrete applicable.Such as working head is build the situation that work bores, and this working head is suitable for coordinating the boring of rotary and impact type, but is not suitable for boring.

For enabling electric tool be widely used in different occasions, therefore often connect the various working head being applicable to different occasion to electric tool.Working head is generally strip, has the working end acting on workpiece and the pommel be installed in chuck.But various pommel structure and shape are also different often, this just connects various working head to electric tool and brings very large difficulty.The industry is standard market standard for this reason, unifies to the structure of the pommel of the chuck for connecting electric tool of working head and shape, and roughly forms the shape of two kinds of groundwork heads.But the chuck of electric tool in the market often can only connect the working head of wherein a kind of shape, can not the working head of another shape compatible.If the chuck of this kind of electric tool wants the working head connecting another shape, often to transfer again an additional mechanism providing additional operation at chuck.Utilize this additional mechanism providing additional operation connecting the working head of this kind of shape, but will production cost be increased like this, and easily lose, cannot portability be increased.And after this additional mechanism providing additional operation that the chuck of electric tool is transferred, the length of whole electric tool can be made, very easily produce during electric tool work and rock, have impact on performance accuracy, be unfavorable for the raising of comfortableness.Therefore be necessary to design a kind of power tool that can clamp the working head of number of different types.

After the working head meeting demand being installed according to working condition requirement, just work can be carried out.In general, this kind of hand held electric tool has multiple-working mode.Such as the drill jig formula performing boring, as the hammer pattern performing hammering work, carry out the hammer drill pattern bored and hammer into shape in addition simultaneously.Usually on this type electric tool, have the patten transformation button being located at external portion, user is according to the autonomous corresponding mode of operation of selection of operating mode used.But the operation measure of this kind of transmission has following shortcoming: 1. because extra arranges patten transformation button and corresponding construction therein, be unfavorable for the compact in size of whole electric tool.Especially need to avoid this problem in the design process of small-sized electric hammer.2. need the operation that user is extra, carry out patten transformation, be unfavorable for lifting operation comfortableness and simplicity.3. need user independently according to circumstances to select, the intelligentized development trend of instrument cannot be embodied.Therefore be necessary to design a kind of power tool realizing translative mode conversion without the need to custom-designed patten transformation button.

Summary of the invention

In view of this, the object of the present invention is to provide a kind of can the power tool of a kind of standard operation head of firm grip.

The present invention solves the technical scheme that prior art problem adopts: a kind of power tool, a kind of working head can be installed, working head has hexagon profile and circumferential groove, power tool comprises: housing, be positioned at the motor of housing, be positioned at the transmission mechanism of housing, by motor through transmission mechanism drive and do around one axis of operation rotate chuck, chuck comprises the sleeve holding working head, wherein comprise can radially across the axial location part of sleeve and shackle member for chuck, axial location part can coordinate with circumferential groove with moving radially, shackle member can move radially with the hexagon contoured fit of working head.

Preferably, shackle member about the distribution of axis of operation Central Symmetry, and has the card access surface of radial clamping hexagon profile.

Preferably, card access surface is V-type face or plane.

Preferably, the angle in V-type face is 120 degree.

Preferably, chuck comprises the first drive unit be socketed on sleeve, the second drive unit and operates the operating means of the first drive unit and the second drive unit, operating means operationally makes the first drive unit driving axial keeper move radially to snap in circumferential groove, and operating means operationally makes the second drive unit driver card fitting move radially with clamping hexagon profile.

Preferably, the second drive unit has the first drive division of driver card fitting radially-inwardly movement.

Preferably, the first drive division is the drive surface that circumference is arranged, and drive surface radial direction abuts shackle member and can radially-inwardly move by push card fitting.

Preferably, drive surface is the curved surface of radial radius gradual change.

Preferably, shackle member also comprises the floating-point abutting drive surface.

Preferably, drive surface comprises the first different plane of radial radius and the second plane, and when being switched to the second plane from the first plane, the second plane push card fitting radially-inwardly moves.

Preferably, the second drive unit also comprises the second drive division, and the second drive division push card fitting radially outward moves.

Preferably, the second drive division comprises the bias piece of radially bias voltage shackle member.

Preferably, shackle member comprises lug, and the second drive division comprises the convex shoulder radially outward abutting lug.

Preferably, convex shoulder abuts the radial radius gradual change of the bearing surface of lug.

Preferably, the first drive division is the drive surface of radial radius gradual change, and the direction that the radial radius of drive surface diminishes is contrary with the direction that the radial radius of bearing surface diminishes.

Preferably, the second drive unit comprises first actuator with the first drive division and second actuator with the second drive division, and the first actuator is in the tubular along axis of operation opening, and the first actuator accommodates shackle member and the second actuator.

Preferably, the first actuator is fixedly connected with the first drive unit by the alignment pin arranged along axis of operation direction, and the second actuator has and holds the accommodation section passed of alignment pin, such that the first actuator and the second actuator are not relatively turnable to be connected.

Preferably, operating means operationally rotates.

Preferably, operating means is the chuck guard shield being socketed in sleeve periphery.

Compared with prior art, beneficial effect of the present invention is: utilize axial location part and the firm clamping working head of shackle member.

Another object of the present invention is to provide a kind of power tool that can clamp two kinds of dissimilar working heads.

The technical solution adopted in the present invention is: a kind of power tool, can installment work head, working head comprises first working head and the second working head with dissimilar shank, the shank of the first working head has axial limiting groove and radial stopper slot, second working head has hexagon profile and circumferential groove, power tool comprises: housing, be positioned at the motor of housing, be positioned at the transmission mechanism of housing, produced by motor and drive through transmission mechanism and make the chuck around an axis of operation rotary actuation, wherein chuck comprises the axial location part operationally coordinated with axial limiting groove or circumferential groove respectively, chuck also comprises the shackle member of the positive stop strip that coordinates with radial stopper slot and operationally radial clamping hexagon profile.

Preferably, chuck at least has the first clip position of clamping first working head and the second clip position of clamping the second working head, and at the first clip position, axial location part radial direction abuts axial limiting groove, positive stop strip circumference clamping circumference stopper slot, and shackle member departs from clamping working head; At the second clip position, axial location part radial direction abuts circumferential groove, shackle member radial clamping hexagon profile.

Preferably, chuck comprises the operating means that can carry out around axis of operation rotation process, the first drive unit of driving axial keeper, and the second drive unit of driver card fitting, at the first clip position, operating mechanism operates the first drive unit makes axial location part move radially; At the second clip position, operating mechanism operates the first drive unit and the second drive unit makes the first drive unit driving axial keeper move radially, and the second drive unit driver card fitting moves radially.

Preferably, chuck also has the neutral position not clamping working head, and at neutral position, axial location part and shackle member all depart from clamping working head.

Preferably, operating means operationally rotates along first direction, moves to the first clip position from neutral position; Operating means operationally reversely rotates along contrary with first direction second, moves to the second clip position from neutral position.

Preferably, the first drive unit comprises the first drive surface that circumference is arranged, and the first drive surface has the accommodation hole holding axial location part, and when being positioned at the first clip position or the second clip position, the first drive surface impeller-hub leaves to keeper and holds hole.

Preferably, axial location part is steel ball.

Preferably, the second drive unit comprises the first drive division of driver card fitting radially-inwardly movement.

Preferably, the second drive unit also comprises the second drive division of driver card fitting radially outward movement.

Preferably, the first drive unit is axially fixedly connected with the second drive unit, makes operating means can operate the first drive unit and the second drive unit rotates simultaneously.

Preferably, the first drive unit and the second drive unit are respectively equipped with the blind hole held alignment pin and pass, and alignment pin is fixedly connected with the first drive unit and the second drive unit.

Preferably, the first drive unit and the second drive unit are socketed on sleeve respectively, and operating means is be socketed in the outer and chuck guard shield be fixedly connected with the second drive unit of the first drive unit and the second drive unit.

Compared with prior art, beneficial effect of the present invention is: chuck can press from both sides first two dissimilar working head respectively, without the need to any annex, uses more convenient.

Another object of the present invention is to provide a kind of chuck that can utilize to operate the power tool controlling mode of operation switching.

The technical solution adopted in the present invention is: a kind of power tool, comprise: housing, be positioned at the motor of housing, be positioned at the transmission mechanism of housing, by motor through the chuck of transmission mechanism driving around an axis of operation rotary actuation, chuck is for clamping working head and rotary driving force being passed to working head, and be positioned at the beater mechanism of housing, beater mechanism is applied to impact driving force the working head be installed on chuck, power tool has the first mode of operation and the second mode of operation, in the first mode of operation, electric hammer at least exports impact driving force, in the second mode of operation, electric hammer only exports rotary driving force, wherein chuck operationally makes power tool switch between the first mode of operation or the second mode of operation.

Preferably, what chuck can rotate around axis of operation moves at least two different positions, and in primary importance, power tool is in the first mode of operation; In the second place, power tool is in the second mode of operation.

Preferably, chuck also has the neutral position that is unclamped clamping working head, and chuck rotates to first direction and moves to primary importance from neutral position; Chuck rotates to the second direction contrary with first direction and moves to the second place from neutral position.

Preferably, chuck can clamp first working head and the second working head with dissimilar shank, the shank of the first working head has axial limiting groove and radial stopper slot, second working head has hexagon profile and circumferential groove, chuck comprises the axial location part operationally coordinated with axial limiting groove and circumferential groove respectively, and chuck also comprises the shackle member of the positive stop strip that coordinates with radial stopper slot and operationally radial clamping hexagon profile.

Preferably, in primary importance, axial location part radial direction abuts axial limiting groove, positive stop strip circumference clamping circumference stopper slot, and shackle member departs from clamping working head, and now power tool is in the first mode of operation; At the second operating position, axial location part radial direction abuts circumferential groove, and shackle member radial clamping hexagon profile, now power tool is in the second mode of operation.

First mode of operation is the hammer drill pattern exporting rotary driving force simultaneously and impact driving force, second mode of operation is the drill jig formula exporting rotary driving force, power tool also comprises the clutch of connection for transmission mechanism, the link gear of connecting clip and clutch, when chuck turns to primary importance, chuck makes arrangement of clutch operationally be connected with beater mechanism by link gear, thus produces impact driving force to chuck; When chuck turns to the second place, arrangement of clutch interrupts the connection with beater mechanism all the time.

Preferably, link gear also comprises the position-limit mechanism selectively limiting chuck and move axially, and when chuck is positioned at primary importance, position-limit mechanism is not spacing to chuck, thus chuck is operationally moved axially; When chuck is positioned at the second place, the movement of position-limit mechanism restriction chuck, thus make chuck axial restraint.

Preferably, position-limit mechanism comprises the fixture of axial restraint and connecting clip and the moving member that can move axially, and when having axial gap between moving member and fixture, chuck can move axially; When axially abutting between moving member with fixture, chuck axial restraint.

Preferably, chuck has axially outstanding jut, and moving member has the mating part of form fit jut, and mating part comprises different first the connecting face and second and connect face of axial height, when jut be coupled to first connect face time, moving member and fixture axially abut; When jut be coupled to second connect face time, between moving member and fixture, there is axial gap.

Preferably, transmission mechanism comprises the jackshaft of connecting motor, and arrangement of clutch comprises the clutching member connecting jackshaft, and clutching member has the clutch part that can engage with beater mechanism or throw off.

Preferably, clutch part is end-tooth.

Preferably, clutch part is taper surface.

Preferably, be provided with between clutching member and beater mechanism to the bias piece away from beater mechanism direction bias voltage clutching member.

Preferably, chuck comprises the axial location part operationally coordinated with axial limiting groove or circumferential groove respectively, chuck also comprises the shackle member of the positive stop strip that coordinates with radial stopper slot and operationally radial clamping hexagon profile, in primary importance, axial location part radial direction abuts axial limiting groove, positive stop strip circumference clamping circumference stopper slot, and shackle member departs from clamping working head; In the second place, axial location part radial direction abuts circumferential groove, shackle member radial clamping hexagon profile

Compared with prior art, beneficial effect of the present invention is: control to make electric hammer switch different mode of operations by chuck, and without the need to extra operation switching working mode, use more convenient.

Accompanying drawing explanation

Above-described object of the present invention, technical scheme and beneficial effect by the detailed description that can realize specific embodiments of the invention below, can describe and clearly obtain simultaneously by reference to the accompanying drawings.

Identical label in accompanying drawing and description and symbol are for representing identical or equivalent element.

Fig. 1 is the overall schematic of the electric hammer of first embodiment of the invention.

Fig. 2 is the phantom of electric hammer in Fig. 1.

Fig. 3 be in Fig. 1 electric hammer along the exploded perspective view of axis of operation.

Fig. 4 is the schematic diagram of the first drive unit along a visual angle of electric hammer in Fig. 1.

Fig. 5 is the schematic diagram of the first drive unit along another visual angle of electric hammer in Fig. 1.

Fig. 6 is the schematic diagram of the first actuator of the second drive unit of electric hammer in Fig. 1.

Fig. 7 is the schematic diagram of the second actuator of the second drive unit of electric hammer in Fig. 1.

Fig. 8 is the schematic diagram of the moving member of the position-limit mechanism of electric hammer in Fig. 1.

Fig. 9 is the schematic diagram that in Fig. 1, electric hammer clamps the first working head.

Figure 10 be in Fig. 9 electric hammer along the sectional view of AA line.

Figure 11 be in Fig. 9 electric hammer along the sectional view of BB line.

Figure 12 is the schematic diagram that in Fig. 1, electric hammer clamps the second working head.

Figure 13 be in Figure 12 electric hammer along the sectional view of AA line.

Figure 14 be in Figure 12 electric hammer along the sectional view of BB line.

Figure 15 is the schematic diagram of the electric hammer of second embodiment of the invention.

Figure 16 is the sectional view along AA ' line when electric hammer clamps the first working head in Figure 12.

Figure 17 is the sectional view along BB ' line when electric hammer clamps the first working head in Figure 12.

Figure 18 is the sectional view along AA ' line when electric hammer clamps the second working head in Figure 12.

Figure 19 is the sectional view along BB ' line when electric hammer clamps the second working head in Figure 12.

Figure 20 is the schematic diagram of the electric hammer of third embodiment of the invention.

Figure 21 is along AA when in Figure 20, electric hammer clamps the first working head " sectional view of line.

Figure 22 is along BB when in Figure 20, electric hammer clamps the first working head " sectional view of line.

Figure 23 is along AA when in Figure 20, electric hammer clamps the second working head " sectional view of line.

Figure 24 is along BB when in Figure 20, electric hammer clamps the second working head " sectional view of line.

Figure 25 is the schematic diagram of the first working head.

Figure 26 is the schematic diagram of the second working head.

1, power tool 2, housing 3, transmission mechanism

4, chuck 5, beater mechanism 6, first drive unit

7, the second drive unit 8, clutch 9, link gear

10, axis of operation 11, working head 12, head

13, shank 14, circular contour 15, half fluting

16, open end 17, enclosed slot 18, hexagonal outline

19, circumferential groove 20, operating means 21, motor

22, motor drive shaft 23, power line 24, handle portion

25, handle hole 26, switch 31, reduction box casing

32, jackshaft 33, spring bearing 34, first travelling gear

35, the second travelling gear 37, haptic element 38, O type circle

39, position-limit mechanism 41, gear wheel 42, sleeve

43, perforate 44, axial location part 45, positive stop strip

46, shackle member 47, card access surface 48, floating-point

49, lug 51, Oscillating lever bearing 52, percussion hammer

53, cylinder 55, projection 56, depressed part

57, the 3rd perforation the 58, first actuator 59, second actuator

60, domatic 61, first perforation 62, arc surface

63, side, container cavity 64, first side 65, second

66, jut 67, stuck point 68, stage portion

69, connecting hole 71, sidewall 72, roof

73, the second perforation 74, radial boss 75, connecting hole

76, drive surface 77, locating slot 78, convex shoulder

81, clutching member 82, spline housing 83, spline part

84, clutch part 91, fixture 92, moving member

93, bias piece 94, dead turn 95, first connect face

96, second connects face 97, neutral gear connects face 98, location stuck point

99, positioning convex 101, cam surface 102, bias piece

103, radial outer end 104, radial inner end 105, first cam surface

106, the second cam surface 109, cam surface 110, first working head

111, the second working head 112, guard shield 113, chuck guard shield

114, indicating structure 115, locating slot 116, keeper

117, locating hole 207, second drive unit 244, axial location part

246, shackle member 247, card access surface 306, first drive unit

307, the second drive unit 310, biasing device 344, axial location part

346, shackle member 421, first space 422, Second gap

Detailed description of the invention

Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail.

Hand-hold power tool 1 is in fig. 1 generally used for carrying out impact type boring along axis of operation 10 as shown in Figure 1 or being called hammer drill, and rotary drilling or be referred to as to screw.This kind of hand-hold power tool 10 can comprise electric hammer, electric pick etc.In the present invention, illustrate with electric hammer.Electric hammer comprises the housing 2 being enclosed in periphery.Housing 2 is preferably two-piece type half shell and is spliced.As shown in Figure 2, in the inside of housing 2, be provided with motor 21.Motor 21 has motor drive shaft 22 and exports for generation of rotation.In the present embodiment, motor 21 can be direct current generator or the alternating current generator with Electronic Control or Non-follow control, by this Electronic Control or Non-follow control can governor motor rotating speed and preferably, the driving torque of motor can be controlled.This Electronic Control or Non-follow control can be arranged to according to rotational speed regulation driving torque or according to load regulation rotating speed.

In an embodiment as shown in Figure 1, power tool 1 also comprises the power line 23 connecting external power source, and power line 23 is electrically connected motor 21, thus is supplied to the power that motor 21 produces rotation output.In a preferred embodiment, power tool 1 also can not comprise power line 23, but is set to the power brick of motor 21 power supply in housing 2 inside.Power brick can be charged repeatedly, is charged to power brick by charging inlet.The mode of wireless charging can certainly be adopted to charge to power brick, and do not need to arrange charging inlet in addition.In unshowned embodiment, power brick is not arranged on enclosure interior, but can adopt and tear the formula of pulling out open or other known modes are connected on housing.Power brick can disassemble charges.The kind of power brick is also can the type such as lithium battery, lead-acid battery, nickel-cadmium cell.

Power brick is placed in the handle portion 24 of power tool 1 usually.Power tool 1 has the front end be positioned on the right side of as Fig. 1 and the rear end be positioned on the left of Fig. 1 along axis of operation 10 direction.Namely handle portion 24 is positioned at the rear end of power tool 1.Handle portion 24 can be configured to D type or other shapes such as U-shaped, has the handle hole 25 that the hand for user grips in the middle of it.Switch 26 for connecting and cut out motor 21 is positioned at the edge of handle hole 26, and when the hand of user grips, finger can this switch 26 of handled easily.

Transmission mechanism 3 is also provided with in housing 2.The motor drive shaft 22 of motor 21 is positioned at the chuck 4 of power tool 1 front end via the driving of this transmission mechanism 3, chuck 4 selectively can install the working head 11 being suitable for impact type boring or being suitable for screwing.Particularly, in the present embodiment, transmission mechanism 3 comprises the reduction box casing 31 being arranged at housing 2 inside, the jackshaft 32 being arranged on reduction box casing 31 inside.Reduction box casing 31 also constitutes the inner casing of power tool 1.In order to keep good sealing, the element of transmission mechanism 3 is arranged at the inside of reduction box casing 31.Jackshaft 32 is extended along axis of operation direction.Preferably, the axis runout axis of operation of jackshaft 32 self is arranged, but the axis both keeping is parallel to each other.The two ends of jackshaft 32 arrange spring bearing 33 respectively for supporting jackshaft 32.Jackshaft 32 is respectively by gear transmission effect connecting motor 21 and chuck 4 respectively.Particularly, jackshaft 32 is fixed with the first travelling gear 34.First travelling gear 34 be positioned near motor 21 position, and with motor drive shaft 22 gears meshing, thus the rotation of motor 21 is exported pass to jackshaft 32, jackshaft 32 rotates around self axis is also corresponding.The gear wheel 41 that jackshaft 32 also comprises the second travelling gear 35, second travelling gear 35 and chuck 4 engages each other all the time.The power having motor 21 to produce like this passes to chuck 4 through the transmission effect of transmission mechanism 3, and chuck 4 can be driven rotatably by around axis of operation, and then produces rotation output to the working head 11 in chuck 4.Preferably, the second travelling gear 35 is arranged on the end of jackshaft 32 near chuck 4, and the second travelling gear 35 also can be the spline tooth being arranged on jackshaft 32 end.

Beater mechanism 5 is also provided with in housing 2.Beater mechanism 5 can be applied to generation impulsive force the working head 11 be installed on chuck 4.Preferably, beater mechanism 5 is positioned at reduction box casing 31.Beater mechanism 5 mainly comprises the Oscillating lever bearing 51 be arranged on jackshaft, connects the cylinder 53 of Oscillating lever bearing 51 and be positioned at the percussion hammer 52 of cylinder 53 and be positioned at the lance in percussion hammer 52 front.Pine fits on jackshaft 32 Oscillating lever bearing 51, and Oscillating lever bearing 51 and jackshaft 32 can be relatively rotated.The rotary driving force of jackshaft 32 can't pass to oscillation bearing 51, makes Oscillating lever bearing 51 corresponding sports.But after meeting certain condition, Oscillating lever bearing 51 power connects jackshaft 32.Oscillating lever bearing 51 can be the reciprocating motion of cylinder 53 relative to percussion hammer 52 the convert rotational motion of jackshaft 32.Meanwhile, formed pneumatic spring in cylinder 53 by the gas that percussion hammer 52 is closed, pneumatic spring promotion percussion hammer 52 travels forward and clashes into working head 11, drives working head 11 along the reciprocating motion in axis of operation 10 direction thus.In the present embodiment, cylinder 53 is extended along axis of operation 10.In other embodiments, Oscillating lever bearing also can connect piston, drives piston to produce relative motion relative to cylinder.In addition, beater mechanism 5 also can have other forms.Such as, beater mechanism 5 can utilize crank mechanism to produce the axial impact force of the convert rotational motion of bias for working head 11.These beater mechanisms 5 are all structures common in this area.

The chuck 4 of the present embodiment can clamp at least two kinds of dissimilar working heads 11.Working head comprises the first working head 110 such as shown in Figure 25 or the second working head 111 as shown in figure 26.These working heads 11 all comprise and the head 12 of absorption surface and the shank 13 be coupled in chuck 4.But shank 13 has different shapes usually.For the first working head 110, its shank 13 roughly has circular contour 14, has groove respectively on 4 Along ent positions of circle simultaneously.These 4 grooves have same structure between two, thus the structure that formation two kinds is different altogether.And two circumferentially relative grooves have same structure.As shown in figure 25, wherein one is configured to one end and closes, half fluting 15 that one end is open.The bearing of trend of half fluting 15 is consistent with the bearing of trend of whole working head 11.The open end 16 of half fluting 15 should be positioned at the end of shank 13, thus when this working head 11 is inserted in chuck 4, in chuck 4 with should just can be inserted in half fluting 15 from open end 16 by half 15 corresponding bulge-structures of slotting, thus play the spacing effect of radial direction.Another is configured to the enclosed slot 17 all closed at two ends.The bearing of trend of enclosed slot 17 is same consistent with the bearing of trend of whole working head 11.After other elements snap onto enclosed slot 17, just can play the effect of axial limiting to working head 11.It 15 is 90 degree relative to the angle of working head 11 central axis that enclosed slot 17 and half is slotted.The head 12 of tup 110 has spiral decorative pattern, is beneficial to the discharge of chip in boring procedure.For the second working head 111, the section that its shank 13 is arranged with having two spaced distances, that length is different, there is regular hexagonal profile 18, these sections by standardized have spill rounding cross section circumferential groove 19 separately.

In the present embodiment, chuck 4 can clamp the working head 11 of above-mentioned two types respectively.Particularly, as long as user's operation chuck 4 rotates fixed clamp can live working head 11 around axis of operation 10, and two kinds of working heads 11 can clamp, thus bring conveniently to operation.As shown in Figures 2 and 3, chuck 4 includes the sleeve 42 of shank 13 insertion holding working head 11.Sleeve 42 roughly becomes cylindrical shape, and sleeve 42 extends along axis of operation 10 direction, two ends perforate 43 respectively of its axis.The shape of perforate 43 is roughly circle, and radius is enough large, can ensure that all types of working head 11 can insert like this.Chuck 4 comprises the retaining mechanism that locking is inserted into the working head 11 in sleeve 42.In order to the working head 11 of different handle shapes design can be clamped, the retaining mechanism of chuck 4 includes the axial location part 44 that operationally this kind of with enclosed slot 17 axial limiting groove and circumferential groove 19 coordinate, and further comprises the shackle member 46 of positive stop strip 45 that 15 this kind of radial stopper slots of slotting with half coordinate and operationally radial clamping working head hexagon profile 18.

In addition, chuck 4 also has the first clip position of clamping first working head 110 and the second clip position of clamping the second working head.When chuck 4 moves to the first clip position as shown in Figure 9, chuck 4 just can clamp the first working head 110 be inserted in sleeve 42.And when chuck 4 moves to the second clip position as shown in figure 12, chuck 4 just can clamp the second working head 111 be inserted in sleeve 42.Particularly, at the first clip position, as shown in Figure 10 and Figure 11, axial location part 44 radial direction abuts axial limiting groove, and positive stop strip 45 circumferential clamping circumference stopper slot, and now shackle member 46 departs from clamping first working head 110, does not play the effect of clamping.At the second clip position, as shown in Figure 13 and Figure 14, axial location part 44 radial direction abuts circumferential groove 19, the hexagon profile 18 of shackle member 46 radial clamping second working head 111, and now positive stop strip 45 does not have the second working head 111 position-limiting actions.In the present embodiment, the first clip position and the second clip position is different.Certainly in other examples, the first clip position and the second clip position can be identical, and under this position, for the different operating head inserted, user selectively operates clamp system and clamps the working head of correspondence respectively.Preferably, chuck 4 also has the neutral position not clamping any working head 11.When chuck 4 is in neutral position, axial location part 44 and shackle member 46 all depart from clamping working head 11, and working head 11 can be pulled up from chuck 4 very like a cork or from outside, working head 11 is inserted into chuck 4.When neutral position, user is inserted into the first working head 110 in chuck 4, then operates chuck 4 and moves to the first clip position, then chuck 4 just by axial location part 44 and positive stop strip 45 to the first working head 110 firm grip.When neutral gear position, user is inserted into the second working head 111 in chuck 4, then operates chuck 4 and moves to the second clip position, then chuck 4 just by axial location part 44 and shackle member 46 to the second working head 111 firm grip.

As shown in Figures 2 and 3, axial location part 44 is roughly positioned in the circumferential plane of vertical operation axis 10, and axial location part 44 symmetric points Central Symmetry centered by the subpoint of axis of operation 10 in circumferential plane.In the present embodiment, the quantity of axial location part 44 is two, and the quantity of certain axial location part also can more than three and three.When the quantity of axial location part 44 is two time, axial location part 44 is symmetrical about axis of operation 10.Axial location part 44 can move radially and enter into sleeve 42 inside with steady job 11 with being driven.The sidewall of sleeve 42 has the first space 421 holding the turnover of axial location part 44 radial direction.Shape and the quantity in the first space 421 are all matched with axial location part 44.In the present embodiment, axial location part 44 is steel ball, so the shape in the first space 421 is circular, its radius is a bit larger tham the radius of axial location part 44, facilitates axial location part 44 to pass in and out.The quantity in the first space 421 is also two, and is also be symmetrical arranged about axis of operation 10.In the present embodiment, positive stop strip 45 and axial location part 44 are 90 degree relative to the angle of axis of operation 10.Such design is all to coordinate the first working head 110 from the insertion of sleeve 42.When the first working head 110 is inserted in sleeve 42, half fluting 15 of the first working head 110 just in time with positive stop strip 45 form fit.Meanwhile, axial location part 44 operationally moves radially, and the enclosed slot 17 that part enters into the first working head 110 is locked.Because enclosed slot 17 two ends are all closed, therefore can to carry out along axis of operation 10 direction to the first working head 110 spacing for axial location part 44, but restriction is not dead completely.Axial location part 44 can tup relatively, can do axial displacement to a certain degree in enclosed slot 17.The concrete operations of axial location part 44 can be mentioned in subsequent descriptions.And because partly fluting 15 and positive stop strip 45 circumferentially lock, when the sleeve 42 of chuck 4 rotates around axis of operation 10 time, positive stop strip 45 on sleeve 42 can be supplied to the first working head 110 driving force, drives that the first working head 110 is also corresponding to rotate around axis of operation 10.

Shackle member 46 is roughly positioned in the circumferential plane of vertical operation axis 10, and shackle member 46 symmetric points Central Symmetry centered by the subpoint of axis of operation 10 in circumferential plane.Shackle member 46 is similar to axial location part 44 in this, and both have identical projected position in circumferential plane, and namely shackle member 46 and axial location part 44 are 0 degree relative to the angle of axis of operation 10.Shackle member 46 can radially move equally.And in the present embodiment, the quantity of shackle member 46 is two about axis of operation 10 symmetry.As shown in Figure 3, shackle member 46 is roughly the column construction in cuboid.Certainly, shackle member 46 also can be other shapes such as cylinder, triangle body.Shackle member 46 has radial card access surface 47 of aiming at shank 13, and card access surface 47 is V-type bending side.V-type opening aims at shank.The angle in V-type face is preferably 120 degree, can ensure that V-type opening can snap fit onto to form fit on the hexagon profile 18 of the second working head 111 like this.The footpath of the card access surface dorsad 47 of shackle member 46 is rearwardly provided with protruding floating-point 48, and so just make the contact of other elements and spacer pin be contacted by floating-point 48, can ensure it is all point cantact, consequent frictional force is less.In addition, the relative two sides of the card access surface 47 of shackle member 46 are also respectively equipped with lug 49.Lug 49 is outstanding from corresponding side respectively along axis of operation 10 direction.There is Second gap 422 on the sleeve 42 that hold the turnover of card access surface 47 radial direction.The form fit of Second gap 422 is in shackle member 46.So the shape of Second gap 422 is rectangle, and the length of this Second gap 422 and wide being a bit larger tham respectively limit the length of shackle member 46 and wide, make shackle member 46 can free in and out this Second gap 422.First space 421 and Second gap 422 are spaced on axis of operation 10 direction, make the diverse location of axial location part 44 and the shackle member 46 just in time shank 13 of clamping working head 11 like this.Incorporated by reference to Fig. 9 and Figure 12, when the shank 13 of the second working head 111 is inserted into after in sleeve 42, on the one hand, axial location part 44 operationally moves radially, and the circumferential groove 19 that part enters into the second working head 111 is locked, and that is axial location part 44 can carry out axial limiting to the second working head 111.On the other hand, shackle member 46 operably moves radially, and the card access surface 47 of shackle member 46 closely adheres on the hexagon profile 18 of the second working head 111, thus shackle member 46 and the second working head 111 are circumferentially locked, when chuck 4 rotates around axis of operation 10 time, shackle member 46 can be supplied to the second working head 111 rotary driving force, drives that the second working head 111 is also corresponding to rotate around axis of operation 10.

In the present embodiment, chuck 4 and the mode around axis of operation 10 rotation process move to the first clip position or the second clip position.In other embodiment, chuck 4 can be to move axially or other mode moves.Chuck 4 includes the operating means 20 that can carry out around axis of operation rotation process, the first drive unit 6 of driving axial keeper 44 and the second drive unit 7 of driver card fitting 46.When operating means 20 operationally turns to the first clip position, as Fig. 9 to Figure 11, shown operating means 20 just operation the first drive unit 6 driving axial keeper 44 moves radially, thus the first working head 110 is clamped.It should be noted that because the first working head 110 is in the process inserting sleeve 42, positive stop strip 45 is aimed at automatically and circumferential stopper slot on clamping first working head 110, drives positive stop strip 45 without the need to extra driving element.In the present embodiment, positive stop strip 45 for being fixedly installed on the inwall of sleeve 42, and protrudes from inwall setting.Positive stop strip 45 is extended along axis of operation 10 direction, and be positioned near perforate 43 place, thus convenient when the first working head 110 inserts sleeve 42, its circumferential stopper slot is automatically and positive stop strip 45 form fit.When operating means 20 operationally turns to the second clip position, as shown in Figure 12 to Figure 14, operating means 20 just operation the first drive unit 6 driving axial keeper 44 moves radially to snap in circumferential groove 19, simultaneously operating means 20 operates the second drive unit 7 driver card fitting 46 and moves radially with clamping hexagon profile 18, thus the second working head 111 is clamped.In a preferred embodiment, operating means 20, along first direction around axis of operation 10 rotation process, makes chuck 4 move to the first clip position from neutral position; Operating means 20, along second direction around axis of operation 10 rotation process, makes chuck 4 move to the second clip position from neutral position; First direction and second direction are contrary.In other embodiments, first direction and second direction also can be angles identical or at an angle.

As shown in Figures 3 to 5, the first drive unit 6 roughly circlewise, has the first perforation 61 in the middle of it and passes with receiving sleeve 42.The circumferential hole wall surrounding the first perforation 61 is formed primarily of arc surface 62, and the distance at the center of arc surface 62 to the first drive unit 6 is R1.Hole wall also has outwardly container cavity 63 in addition, the cambered surface forming container cavity 63 is R2 to the distance at the center of the first actuator, and wherein R2 is greater than R1.Axial location part 44 is generally positioned at container cavity 63, and due to container cavity 63 footpath convex, now axial location part 44 is not connected to the shank 13 in sleeve 42.After the first drive unit 6 to be operated by operating means 20 and produces and rotate, the axial location part 44 in container cavity 63 will detach container cavity 63, and starts to abut arc surface 62.Because R1 is less than R2, so arc surface 62 radially-inwardly moves to keeper 44 with regard to impeller-hub, thus axial location part 44 is abutted to the shank 13 in sleeve 42.In addition, it should be noted that and no matter turn to the first clip position or turn to the second clip position, the axial location part 44 in container cavity 63 will detach container cavity 63, and arc surface 62 impeller-hub radially-inwardly moves to keeper 44.First drive unit 6 also has two relative sides, is respectively the first side 64 and the second side 65.First side 64 is along axis of operation 10 direction towards motor 21.First side 64 has jut 66.Preferably, jut 66 has domatic 60 of inclination and the stuck point 67 of projection.The effect of domatic 60 can make other elements climb up jut 66 when mainly the first drive unit 6 rotates more convenient.And location is convenient in the effect arranging stuck point 67.The stuck point that protruding stuck point 67 can other elements cave in matches, after putting in place, both namely shape connect.Certainly in other embodiments, the stuck point 67 of jut 66 also can be arranged to cave in, and the stuck point on other elements is arranged to prominent protruding.In the present embodiment, the quantity of jut 66 is two, and is along the circumferential direction just in time positioned at the two ends place of diameter.The quantity of jut 66 is also not limited to two, can be more than three and three.In addition, the part-circular periphery on the first side 64 is also provided with stage portion 68, for coordinating with other elements.Can introduce in detail in description after a while.Second side 65 facing to the first side 64 facing to just in time contrary.Second side 65 has connecting hole 69, the second drive unit 7 can be coupled together by the alignment pin (not shown) inserted in connecting hole 69.Connecting hole 69 is preferably blind hole.

The second drive unit 7 for driver card fitting 46 is socketed on the sleeve 42, and axial location is consistent with the axial location of shackle member 46.Second drive unit 7 radial drive shackle member 46 moves.In the present embodiment, the second drive unit 7 includes the first actuator 58 and the second actuator 59 of split design.Certain first actuator 58 and the second actuator 59 also can be one-body molded.As shown in Figure 2 and Figure 6, the first actuator 58 is roughly the cylinder of one end open.First actuator 58 mainly comprises the sidewall 71 of annular and is positioned at the roof 72 of sidewall one end.Shackle member 46 is positioned at this cylinder.Roof 72 has the second perforation 73 and passes with receiving sleeve 42.Inside the sidewall 71 of annular, be provided with radial boss 74, radial boss 74 is for the second actuator 59.Radial boss 74 is also provided with the connecting hole 75 coordinated with alignment pin.By alignment pin, the first actuator 58 and the second actuator 59 are not coupled together rotatably like this.The drive surface 76 for driver card fitting 46 is also provided with inside the sidewall 71 of the first actuator 58.This drive surface 76 forms the first drive division of actuator shackle member 46 radially-inwardly movement.The profile of this drive surface 76 is crescent.Drive surface 76 is the curved surface of the radial distance gradual change to the first actuator 58 center.This drive surface 76 is touched with the radial back face of shackle member 46.Particularly, the floating-point 48 that drive surface 76 and footpath are rearwardly gone up contacts.Due to the gradual change of the radius of this drive surface 76, therefore when the first actuator 58 carries out rotating operation, when floating-point 48 is moved to the first direction that radius diminishes relative to the first actuator 58, floating-point 48 is just subject to the withstand effect of drive surface 76 and makes shackle member 46 produce radial displacement, thus realizes the locking of shackle member 46 pairs of working heads 11.When floating-point 48 relative to the first actuator 58 to radius become large second direction move time, and first direction and second direction are contrary.First drive division can not push card fitting 46 in the present embodiment, the quantity of drive surface 76 is two, and the quantity of shackle member 46 is just in time corresponding.The relative movement under the effect of corresponding drive surface 76 of each shackle member 46.In addition, be also provided with locating slot 77 outside the sidewall 71 of the first actuator 58, locating slot 77 is for being fixedly connected with operating means 20.The operation of operating means 20 thus the second drive unit 7 can be passed to.In the present embodiment, operating means 20 is for being arranged on the chuck guard shield 113 be socketed in outside the first drive unit 6 and the second drive unit 7.Chuck guard shield 113 both can give chuck 4 protective action, and user need not direct control driving mechanism and at once drive driving mechanism corresponding sports by operation chuck guard shield 113 in addition.The indicating structure 114 being convenient to user's operation can be set in addition on chuck guard shield 113, utilize the operation that user is fast and convenient.In other examples, operating means 20 also can be arranged on outside toggle switch or other elements.

As shown in Figure 7, the second actuator 59 roughly ringwise.Second actuator 59 has the 3rd perforation 57 that receiving sleeve 42 passes.Second actuator 59 is arranged in the cylinder of the first actuator 58.The depressed part 56 being circumferentially provided with indent of the second actuator 59, the effect of depressed part 56 is radial boss 74 clampings with the first actuator 58, thus ensures the first actuator 58 with the second actuator 59 without being connected in relative rotation.In the present embodiment, the second drive unit 7 also comprises the second drive division of driver card fitting 46 radially outward movement.Second drive division is made up of jointly the first actuator 58 and the second actuator 59.When operating mechanism 9 operate the second drive unit 7 rotate time, the second drive division can drive shackle member 46 radially outward to move, from locking working head 11 position be returned to unclamp locking working head 11 position.This second drive division also has the effect to shackle member 46 axial limiting.As shown in Figure 2, the first actuator 58 and the second actuator 59 have convex shoulder 78 respectively, and convex shoulder 78 just in time abuts against with the lug 49 of shackle member 46, for providing radially outer supporting role.Lug 49 due to shackle member 46 is bearing on corresponding convex shoulder 78 respectively, simultaneously because the axial distance of convex shoulder 78 is fixed, so convex shoulder 78 also has the effect to shackle member 46 axial limiting.The axial sides of the second actuator 59 is provided with protruding projection 55.The profile of projection 55 forms the convex shoulder 78 of radial support shackle member 46.It should be noted that the profile of projection 55 is also be made up of the curve of radius gradual change, and consistent with the drive surface 76 on bending radian and the first actuator 58.The roof 72 of the first actuator 58 is provided with corresponding projection 55 simultaneously.The profile of the projection 55 on roof 72 is formed and forms consistent with the profile of the projection 55 on the second actuator 59.Because the first actuator 58 and the second actuator 59 not can be movable relatively, when the second drive unit 7 rotation makes shackle member 46 move to the first direction that radius diminishes relative to drive surface 76, the direction that the lug 49 of shackle member 46 also diminishes to radius relative to the convex shoulder 78 on the first actuator 58 and the second actuator 59 is moved.Drive surface 76 is while radially-inwardly pressing shackle member 46 thus, and convex shoulder 78 also radially-inwardly moves, and can't produce radially outer resistance.When shackle member 46 relative to drive surface 76 to radius become large second direction move time, convex shoulder 78 on first actuator 58 and the second actuator 59 moves to second direction, the lug 49 of push card fitting 46 radially outward moves thus, and now the drive surface 76 of the first drive division also radially outward moves, and can not produce radially inner resistance.Convex shoulder 78 radially outward moves thus, and towards radially outer direction push card fitting 46, and drive surface 76 becomes large direction to radius simultaneously and moves, and can't produce radially inner resistance.

Selectively export rotary driving force due to power tool and impact driving force, therefore power tool comprises the hammer pattern exporting separately and impact driving force, exports separately the drill jig formula of rotary driving force and exports the hammer drill pattern of impacting driving force and rotary driving force simultaneously.And the power tool in the present invention has at least two kinds of dissimilar mode of operations, wherein the first mode of operation at least exports impact driving force, and the second mode of operation only exports rotary driving force.Therefore namely the first mode of operation can refer to hammer pattern, also can refer to hammer drill pattern.And the second mode of operation refers to the drill jig formula exporting separately rotary driving force.Chuck of the present invention operationally makes this electric hammer switch between the first mode of operation or the second mode of operation.In the present embodiment, chuck can enclose the operation be rotated about axis, and can turn to different positions.When moving to primary importance, power tool is switched to the first mode of operation; When moving to the second place, power tool just can be switched to the second mode of operation.In other examples, chuck also can switch to different mode of operations by the operation moved axially.Also the state of electron detection chuck can be adopted to change, switch to different mode of operations etc. additive method.

In addition, chuck operates rotationally and also has multitude of different ways.In the present embodiment, chuck moves to primary importance from neutral position along first direction, and electric hammer just switches to the first mode of operation; Chuck moves to the second place from neutral position along the second direction contrary with first direction, and electric hammer just switches to the second mode of operation.In other examples, chuck is rotated in a first direction to primary importance, and electric hammer just switches to the first mode of operation, and chuck continues to be rotated in a first direction to the second place, and electric hammer is just corresponding switches to the second mode of operation.Chuck turns to different operating positions in a word, just can correspond to different gears, and each gear just corresponding mode of operation of corresponding electric hammer.

And dissimilar working head can be clamped due to chuck of the present invention, the working head that therefore grips is different correspondingly can be switched to corresponding mode of operation.Such as, when chuck moves to the first clip position of the working head clamping applicable first mode of operation, chuck just correspondingly can be switched to the first mode of operation power tool, when chuck moves to the second clip position of the working head clamping applicable second mode of operation, chuck just can and corresponding power tool is switched to the second mode of operation.This brings many convenience to user, the step of corresponding selection mode of operation after the step of grips working head and clamping can be combined in a step of grips working head and go, because namely automatically choose corresponding mode of operation after the complete working head of the grips in the present invention.

As shown in Figure 2, the power tool clutch 8 that comprises connection for transmission mechanism and link gear 9 that chuck and clutch 8 are coupled together.The effect of clutch 8 mainly selectively carries out clutch beater mechanism 5 and transmission mechanism 3, thus exports accordingly or do not export impact driving force.And chuck 4 just drives clutch 8 to produce corresponding clutch by the gearing of link gear 9.Clutch 8 mainly comprises the clutching member 81 of connection for transmission mechanism 3 all the time, and clutching member 81 selectively connects beater mechanism 5.In other embodiments, clutching member 81 also can connect beater mechanism 5 all the time, and selectively connection for transmission mechanism 3.Clutching member 81 also can selectively be connected with beater mechanism 5 and transmission mechanism 3 respectively.Clutch 8 is also included on jackshaft 32 and is fixed with spline housing 82, and spline housing 82 rotates with jackshaft 32.Clutching member 81 has the spline part 83 coordinated with spline housing 82, and the rotary motion of jackshaft 32 just can by passing to clutching member 81 by spline part 83, make clutching member 81 all the time with jackshaft 32 together without relative rotation.Clutching member 81 also comprises that clutch part 84 is selectable carries out clutch with beater mechanism 5.In the present embodiment, clutch part 84 and spline part 83 lay respectively at the axial two ends of clutching member 81.In other examples, clutch part 84 and spline part 83 also can be in different positions.Clutch part 84 carries out clutch with the Oscillating lever bearing 51 be positioned on jackshaft 32 in the mode moved axially.When clutch part 84 engages with Oscillating lever bearing 51, transmission mechanism 3 just produces power with beater mechanism 5 and is connected, and beater mechanism 5 produces impulsive force to the working head 11 in chuck 4.When clutch part 84 is thrown off with the engaging of Oscillating lever bearing 51, transmission mechanism 3 just runs out of steam with beater mechanism 5 and is connected, and beater mechanism 5 can not produce impulsive force to working head 11.Certainly, clutch part 84 also can carry out clutch with other elements in beater mechanism 5, such as percussion hammer 52, cylinder 53 etc.In addition, beater mechanism 5 is if crank-type, then clutch part 84 also can carry out clutch with crank or travelling gear.Clutch mode in addition can be the mode of radial clutch or the clutch of circumference, such as clamping tooth engagement.In addition in the present embodiment, clutch part 84 has conical profile, and after clutch part 84 generation moves axially, the profile of clutch part 84 just closely engages with beater mechanism 5, thus carries out transmission.In other embodiments, clutch part 84 also has the end-tooth towards beater mechanism 5, and after clutch part 84 generation moves axially, the end-tooth of clutch part 84 just closely engages with beater mechanism 5.Also be provided with between clutch part 84 and beater mechanism 5 bias voltage away from bias piece.Here bias piece can be preferably wind spring.

And link gear 9 is between chuck 4 and clutch 8, mainly play gearing.Chuck 4 produces to move axially and just by link gear 9, the corresponding generation of clutching member 81 of clutch 8 is moved axially.In the present embodiment, link gear 9 comprises shift fork, and shift fork has and is socketed in O type circle 38 on the sleeve 42 of chuck 4 and from outwardly directed haptic element 37 O type circle 38.O type circle 38 utilizes the fixture of other modes such as collar fixing on the sleeve 42.Haptic element 37 is connected to clutching member 81, after chuck 4 generation is mobile, and O type circle 38 also corresponding movement, thus drive the corresponding movement of clutching member 81 by haptic element 37, to carry out clutch action.

After the first working head 110 inserts chuck 4, chuck 4 is corresponding turns to the first clip position, and now chuck 4 fixed clamp lives the first working head 110.Then power tool 1 is activated, and by transmission mechanism 3 driving force that motor 21 produces is passed to the first working head 110 on chuck 4, the first working head 110 can be rotated around axis of operation 10.When the first working head 110 touches surface of the work, surface of the work is supplied to the thrust of the first working head 110 axis.First working head 110 drives chuck 4 to produce and moves axially, thus is made by link gear 9 that the clutching member 81 of clutch 8 is corresponding to be moved axially.And after clutching member 81 moves and engages with beater mechanism 5, beater mechanism 5 just produces and impacts driving force to the first working head 110 on chuck 4, now power tool 1 produces rotary driving force simultaneously and impacts driving force to the first working head 110, and power tool 1 is in the first mode of operation.

Preferably, link gear 9 also comprises the position-limit mechanism 39 selectively limiting chuck 4 and move axially.When chuck 4 moves to the first clip position, position-limit mechanism 39 does not carry out spacing to chuck 4, thus chuck 4 can be moved axially, and carries out power tool 1 to switch to the first mode of operation.But when chuck 4 moves to the second clip position, chuck 4 fixed clamp second working head 111.Position-limit mechanism 39 can limit the movement of chuck 4, thus makes chuck 4 axial restraint.After chuck 4 is limited, clutch 8 is departed from beater mechanism 5 all the time engage, thus transmission mechanism 3 is also thrown off power with beater mechanism 5 all the time and is connected, now power tool 1 only produces rotary driving force to the second working head 111, and power tool 1 is in the second mode of operation.

As shown in Fig. 3 to Figure 14, the mode that position-limit mechanism 39 controls the axial air gap between chuck 4 and other elements carries out carrying out spacing to chuck 4.When chuck 4 exists axial air gap with other elements, owing to not having members block, chuck 4 just can move axially.When chuck 4 and other elements do not exist axial air gap, when namely chuck 4 and other elements abut against, chuck 4 now just cannot move axially.When the present invention is not limited to this kind of mode, also can adopt circumferential clamping, the modes such as inclined-plane abutting.Position-limit mechanism 39 mainly includes the fixture 91 of axial restraint and the moving member 92 can doing to move axially.Moving member 92 can abut with chuck 4, thus when having axial gap between moving member 92 and fixture 91, chuck 4 is axially movable.And when axially abutting and do not have axial gap between moving member 92 with fixture 91, chuck 4 is axially fixed and cannot moves axially.In the present embodiment, fixture 91 is fixed by the reinforcement on housing 2 inwall, and make fixture 91 relative with housing 2 fixing, fixture 91 cannot be moved.Preferably, fixture 91 can also play a supportive role to the sleeve 42 of chuck 4, and fixture 91 internal openings receiving sleeve 42 passes.And moving member 92 can move axially by opposed fixed member 91.The bias piece 93 of its bias effect is provided with between fixture 91 and moving member 92.Bias piece 93 is to the direction bias voltage moving member 92 away from fixture 91.Preferably, in order to reduce to rub and improve precision, in the axial sides of fixture 91, also cover has dead turn 94.Dead turn 94 and fixture 91 fit tightly.The two ends of bias piece 93 are connected on moving member 92 and dead turn 94 respectively.Certainly in other embodiments, dead turn 94 can cancel setting.

As shown in Figure 8, moving member 92 is arranged roughly ringwise.Moving member 92 is not rotatable, and can only move axially.Moving member 92 central authorities have perforation makes the sleeve 42 of chuck 4 pass.Moving member 92 is socketed on the sleeve 42, and its side towards motor 21 abuts with bias piece 93, and its side towards working head 11 then abuts with the first drive unit 6 on chuck 4.Particularly, there is the mating part with jut 66 form fit on the first drive unit 6 towards the side of working head 11.Mating part includes different first the connecting face 95 and second and connect face 96 of axial height, and jut 66 is rotatable operatively to be connected face 95 or the second respectively and connect face 96 and connect with first.First to connect the axial height in face 95 higher, and second to connect the axial height in face 96 lower, when jut 66 and first connect face 95 abut time, it is comparatively large to the distance of fixture 91 direction movement along axis that jut 66 just can promote moving member 92, thus moving member 92 is axially abutted with fixture 91.When jut 66 and second connect face 96 abut time, it is less to the distance of fixture 91 direction movement along axis that jut 66 promotes moving member 92, thus make to have axial gap between moving member 92 and fixture 91.Preferably, when being positioned at neutral position to coordinate chuck 4, the first drive unit 6 drives with moving member 92 and abuts, and moving member 92 also comprises neutral gear and connects face 97, and the axial height that neutral gear connects face 97 connects the axial height in face 95 lower than first.Neutral gear connects face 97 and connects face 95 and second first in circumferential direction and connect between face 96.When chuck 4 drives the first drive unit 6 to rotate to the first clip position from neutral position along first direction, jut 66 connects face 97 from abutting neutral gear and is transferred to second and connects face 96.When chuck drives the first drive unit 6 to rotate to the second clip position from neutral position along the second direction contrary with first direction, jut 66 connects face 97 from abutting neutral gear and is transferred to first and connects face 95.Connect face 95, second first to connect face 96 and neutral gear and connect face 97 and be provided with between plane between two and level and smooth domaticly carry out transition, facilitate jut 66 to carry out climbing or descending in moving process.In addition, the radially inner side of moving member 92 also has locating slot 115.Keeper 116 part is as shown in Figure 3 arranged at this locating slot 115.Meanwhile, the corresponding locating hole 117 be provided with for holding portion keeper 116 on the sleeve 42.By keeper 116, moving member 92 and sleeve 42 circumference are fixed like this, thus moving member 82 cannot relatively rotate by relative sleeve 42.Preferably, connect face 95, second first to connect face 96 and neutral gear and connect face 97 and be respectively equipped with for coordinating the location stuck point 98 of location with the stuck point 67 on jut 66.In addition, mating part is also provided with axial raised positioning convex 99.Stage portion 68 snap-fit engagement on positioning convex 99 and the first drive unit 6, is convenient to location.The radial outer periphery of moving member 92 is also provided with perforation to be fixedly connected with secure shroud 112.Secure shroud 112 other fixed forms such as shape can also be joined the mode such as clamping or magnetic absorption and is fixedly connected with moving member 92.Secure shroud 112 is the same with moving member 92, can only move axially and can not rotate.Preferably, secure shroud 112 and chuck guard shield 113 connect.Simultaneously secure shroud 112 is provided with the display pattern of multiple-working mode and matches with the indicating structure 114 on chuck guard shield 113.When after the corresponding rotation of chuck guard shield 113, the corresponding pattern pointing to corresponding mode of operation of indicating structure 114, such user just knows the mode of operation residing for current power instrument, more convenient operation and can not maloperation.

First working head 110 is inserted in sleeve 42, and user's operation makes chuck 4 be rotated in a first direction by operating means 20, the first drive unit 6 driving axial keeper 44 fixed clamp first working head 110.Meanwhile, the jut 66 of the first drive unit 6 abuts to second and connects on face 96, and chuck 4 can be moved axially.After chuck 4 moves axially, by link gear 9 and clutch 8, beater mechanism 5 is connected with transmission mechanism 3 power, power tool 1 just exports rotary driving force and impacts driving force to the first working head 110, is now in the first mode of operation.

Second working head 111 inserts in sleeve 42, user's operation makes chuck 4 rotate along the second direction contrary with first direction by operating means 20, the first drive unit 6 driving axial keeper 44 and the second drive unit 7 driver card fitting 46 fixed clamp second working head 111.Meanwhile, the jut 66 of the first drive unit 6 abuts to first and connects on face 95, and chuck 4 axial restraint cannot be moved.Beater mechanism 5 disconnects with transmission mechanism 3 power all the time, and power tool 1 only exports rotary driving force to the second working head 111, is now in the second mode of operation.

Figure 15 to Figure 19 is the power tool of the second embodiment of the present invention.The main distinction of the second embodiment and the first embodiment is, the quantity of shackle member 246 is 3.And the card access surface 247 of shackle member 246 is plane.First drive division of the driver card fitting 246 of the second drive unit 207 radially-inwardly movement is no longer the curved surface of radius gradual change, but is made up of two vicissitudinous cam surfaces 101 of height.When after insertion second working head 111, after operation second drive unit 207 rotates, highly lower cam surface 101 driver card fitting 246 moves radially thus abuts the second working head 111.Axial location part 244 still snaps fit onto on the circumferential groove 19 of the second working head 111 simultaneously.And when after insertion first working head 110, shackle member 246 is connected to highly higher cam surface 101, thus shackle member 246 not radial clamping first working head 110.But rely on axial location part 244 to snap fit onto the first working head 110 and realize location.Preferably, also shackle member 246 can be provided with in the circumferential plane at the first drive unit 206 place.

Figure 20 to Figure 24 is the power tool of the third embodiment of the present invention, the main feature of the 3rd embodiment is, the driver card fitting 346 of the second drive unit 307 radially-inwardly the first drive division of movement is be made up of two vicissitudinous cam surfaces 109 of height equally, and this point and the second embodiment comparing class are seemingly.In addition, the first drive unit 306 comprises the biasing device 310 of radial bias voltage axial location part 344.In the present embodiment, the stage clip of biasing device 310 for swaying, stage clip radial compression axial location part 344.In addition, the second drive division of the second drive unit 307 driver card fitting 346 radially outward movement has the bias piece 102 be arranged in shackle member 346 to form.Shackle member 346 has container cavity for holding the radial bias piece 102 arranged.The radial outer end 103 of bias piece 102 abuts in shackle member 346 all the time.Radial inner end 104 corresponding with radial outer end 103 on bias piece 102 then abuts on sleeve 42.When the first cam surface 105 that shackle member 346 and the radial radius in cam surface 109 are lower abuts, the radial inner end 104 of bias piece 102 is squeezed in shackle member 346 by sleeve 42 circumference, and therefore fitting 346 is compressed largely.When the second cam surface 106 that shackle member 346 and the radial radius in cam surface 109 are higher abuts, the release compressing to a certain extent of fitting 346.Sleeve 42 is corresponding is in the circumferential provided with stage portion.And in the radial direction, bias piece 102 promotes whole fitting 346 and moves laterally.

The present invention is not limited to lifted specific embodiment structure, and the structure based on the present invention's design all belongs to scope.

Claims

1. a power tool, comprise: housing, be positioned at the motor of described housing, be positioned at the transmission mechanism of described housing, being driven through described transmission mechanism by described motor also can around the chuck of an axis of operation rotary actuation, described chuck is for clamping working head and rotary driving force can being passed to described working head, and be positioned at the beater mechanism of described housing, described beater mechanism is applied to impact driving force the working head be installed on described chuck, described power tool has the first mode of operation and the second mode of operation, in the first mode of operation, described power tool at least exports impact driving force, in the second mode of operation, described power tool only exports rotary driving force, it is characterized in that: described chuck operationally moves, thus described power tool is switched between the first mode of operation and the second mode of operation.

2. power tool according to claim 1, is characterized in that: what described chuck can rotate around described axis of operation moves at least two different positions, and in primary importance, described power tool is in the first mode of operation; In the second place, described power tool is in the second mode of operation.

3. power tool according to claim 2, is characterized in that: described chuck also has the neutral position that is unclamped clamping working head, and described chuck rotates to first direction and moves to described primary importance from neutral position; Described chuck rotates to second direction opposite to the first direction and moves to the described second place from neutral position.

4. power tool according to claim 2, it is characterized in that: described chuck can clamp first working head and the second working head with dissimilar shank, the shank of described first working head has axial limiting groove and radial stopper slot, described second working head has hexagon profile and circumferential groove, described chuck comprises the axial location part operationally coordinated with described axial limiting groove and described circumferential groove respectively, and described chuck also comprises the shackle member of the positive stop strip that coordinates with described radial stopper slot and operationally hexagon profile described in radial clamping.

5. power tool according to claim 4, it is characterized in that: in described primary importance, described axial location part radial direction abuts described axial limiting groove, circumferential stopper slot described in the clamping of described positive stop strip circumference, and described shackle member departs from working head described in clamping, now power tool is in the first mode of operation; At described second operating position, described axial location part radial direction abuts described circumferential groove, and hexagon profile described in the radial clamping of described shackle member, now power tool is in described second mode of operation.

6. power tool according to claim 5, it is characterized in that: described chuck comprises the operating means that can carry out around axis of operation rotation process, drive the first drive unit of described axial location part, and drive the second drive unit of described shackle member, in primary importance, described operating mechanism operates the first drive unit makes described axial location part move radially; In the second place, described operating mechanism operates the first drive unit and the second drive unit makes described first drive unit drive described axial location part to move radially, and described second drive unit drives described shackle member to move radially.

7. power tool according to claim 2, it is characterized in that: described first mode of operation is the hammer drill pattern exporting rotary driving force simultaneously and impact driving force, described second mode of operation is the drill jig formula exporting rotary driving force, described power tool also comprises the clutch connecting described transmission mechanism, connect the link gear of described chuck and described clutch, when described chuck turns to primary importance, described chuck makes described arrangement of clutch operationally be connected with described beater mechanism by described link gear, thus produce impact driving force to described chuck, when described chuck turns to the second place, described arrangement of clutch interrupts the connection with described beater mechanism all the time.

8. power tool according to claim 7, it is characterized in that: described link gear also comprises the position-limit mechanism selectively limiting described chuck and move axially, when described chuck is positioned at primary importance, described position-limit mechanism is not spacing to described chuck, thus described chuck is operationally moved axially; When described chuck is positioned at the second place, described position-limit mechanism limits the movement of described chuck, thus makes described chuck axial restraint.

9. power tool according to claim 8, it is characterized in that: described position-limit mechanism comprises the fixture of axial restraint and connects described chuck and the moving member that can move axially, when having axial gap between described moving member and described fixture, described chuck can move axially; When axially abutting between described moving member with described fixture, described chuck axial restraint.

10. power tool according to claim 9, it is characterized in that: described chuck has axially outstanding jut, described moving member has the mating part of jut described in form fit, described mating part comprises different first the connecting face and second and connect face of axial height, when described jut be coupled to described first connect face time, described moving member axially abuts with described fixture; When described jut be coupled to described second connect face time, between described moving member and described fixture, there is axial gap.

11. power tools according to claim 7, it is characterized in that: described transmission mechanism comprises the jackshaft connecting described motor, described arrangement of clutch comprises the clutching member connecting described jackshaft, and described clutching member has the clutch part that can engage with described beater mechanism or throw off.

12. power tools according to claim 11, is characterized in that: described clutch part is end-tooth.

13. power tools according to claim 11, is characterized in that: described clutch part is taper surface.

14. power tools according to claim 11, is characterized in that: be provided with between described clutching member and described beater mechanism to the bias piece away from clutching member described in the bias voltage of described beater mechanism direction.