CN103846878B - Power tool - Google Patents

Abstract

The present invention relates to a kind of electric hammer, a kind of work head can be installed, work head has hexagon profile and circumferential groove, and electric hammer includes: housing, is positioned at the motor of housing, it is positioned at the drive mechanism of housing, being produced by motor and make to rotate, around an axis of operation, the chuck driven through drive mechanism, chuck includes the sleeve holding work head, and wherein chuck includes axial keeper and shackle member, axial keeper coordinates with circumferential groove, shackle member radially movablely with work head hexagon contoured fit。The electric hammer of the present invention can utilize axial keeper and the firm clamping work 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 be provided only to boring, screw or work for hammering, or are designed for the combination of two described work, for instance for boring with 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 are respectively provided with the chuck of the front end being positioned at electric tool, for housing and clamp locking work head。Although known work head is applicable to the purposes of each regulation best, but mostly or can only can not poorly be applicable to other purposes at all。Such as work the situation that head is fluted drill, and this work head is optimally adapted to screw and hole, but be not suitable in stone and concrete and be suitable for。The head that such as works is build the situation that work is bored, and this work head is adapted for engagement with rotary and impact type boring, but is not suitable for boring。

For enabling electric tool to be widely used in different occasions, therefore often connect the various work head being applicable to different occasion to electric tool。Work head is generally grown up bar shaped, has the working end acting on workpiece and the pommel being installed in chuck。But various pommel structures and shape also tend to be different, this just connects various work head to electric tool and brings very big difficulty。It is standard market standard for this industry, has unified to the structure of the pommel of the chuck for connecting electric tool of work head and shape, and substantially formed the shape of two kinds of groundwork heads。But the chuck of electric tool in the market often can only connect the work head of one of which shape, can not the work head of another shape compatible。If the chuck of this kind of electric tool wants the work head connecting another shape, often transfer again an additional mechanism providing additional operation at chuck。Utilize this additional mechanism providing additional operation connecting the work head of this kind of shape, but thus can increase the cost of production, and be easily lost, it is impossible to increase portability。And after this additional mechanism providing additional operation of transferring on the chuck of electric tool, the length of whole electric tool can be made, very easily produce to rock during electric tool work, have impact on performance accuracy, be unfavorable for the raising of comfortableness。It is therefore desirable to design the power tool of a kind of work head that can clamp number of different types。

Be mounted with to meet the work head of demand according to working condition requirement after, it is possible to be operated。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, also has the hammer drill pattern simultaneously carrying out boring and hammering into shape。Generally having the patten transformation button being located at external portion on this type electric tool, 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. owing to extra arranges patten transformation button and corresponding construction therein, be unfavorable for the compact in size of whole electric tool。Design process particularly in small-sized electric hammer needs avoid this problem。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, it is impossible to embody the intelligentized development trend of instrument。It is therefore desirable to design a kind of power tool realizing translative mode conversion without custom-designed patten transformation button。

Summary of the invention

In view of this, it is an object of the invention to provide a kind of power tool that can firmly clamp a kind of standard work head。

This invention address that prior art problem be the technical scheme is that a kind of power tool, a kind of work head can be installed, work head has hexagon profile and circumferential groove, power tool includes: housing, it is positioned at the motor of housing, it is positioned at the drive mechanism of housing, by motor through drive mechanism drive and make around one axis of operation rotate chuck, chuck includes the sleeve holding work head, wherein include can radially across the axial keeper of sleeve and shackle member for chuck, axial keeper coordinates with circumferential groove radially movablely, shackle member radially movablely with work head hexagon contoured fit。

Preferably, shackle member is distributed about axis of operation centrosymmetry, and has the card access surface of radially 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 includes the operation device of the first driving device, the second driving device and operation the first driving device and the second driving device that are socketed on sleeve, operation device operationally makes the first driving device driving axial keeper move radially to snap in circumferential groove, and operation device operationally makes the second driving device drive shackle member to move radially with clamping hexagon profile。

Preferably, the second driving device has the first drive division driving shackle member radially-inwardly to move。

Preferably, the first drive division is circumferentially disposed drive surface, and drive surface radially abuts shackle member and can radially-inwardly move by push card fitting。

Preferably, drive surface is the curved surface of radially radius gradual change。

Preferably, shackle member also includes the floating-point of abutting drive surface。

Preferably, drive surface includes the first plane and the second plane that radially radius is different, and when being switched to the second plane from the first plane, the second plane push card fitting radially-inwardly moves。

Preferably, the second driving device also includes the second drive division, and the second drive division push card fitting is moved radially outward。

Preferably, the second drive division includes the bias piece that radially biases shackle member。

Preferably, shackle member includes lug, and the second drive division includes the convex shoulder radially outward abutting lug。

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

Preferably, the first drive division is the drive surface of radially radius gradual change, and the drive surface direction that radially radius diminishes is in opposite direction with what bearing surface radially radius diminished。

Preferably, the second driving device includes having the first actuator of the first drive division and has the second actuator of 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, first actuator alignment pin fixing connection the first driving device by arranging along axis of operation direction, the second actuator has the accommodation portion holding alignment pin traverse so that the first actuator and the not relatively turnable connection of the second actuator。

Preferably, operation device operationally rotates。

Preferably, operation device is be socketed in the chuck guard shield that sleeve is peripheral。

Compared with prior art, the invention have the benefit that and utilize axial keeper and shackle member firm clamping work head。

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

The technical solution adopted in the present invention is: a kind of power tool, can installment work head, work head includes the first work head and the second work head with dissimilar shank, the shank of the first work head has axial limiting groove and radial direction stopper slot, second work head has hexagon profile and circumferential groove, power tool includes: housing, it is positioned at the motor of housing, it is positioned at the drive mechanism of housing, produced by motor and drive through drive mechanism and make to rotate, around an axis of operation, the chuck driven, wherein chuck includes the axial keeper that operationally coordinates respectively with axial limiting groove or circumferential groove, chuck also includes the shackle member of the positive stop strip that coordinates with radial direction stopper slot and operationally radially clamping hexagon profile。

Preferably, chuck at least has the first clip position of clamping the first work head and the second clip position of clamping the second work head, and at the first clip position, axial keeper radially abuts axial limiting groove, positive stop strip circumference clamping circumference stopper slot, and shackle member disengaging clamping work head；At the second clip position, axial keeper radially abuts circumferential groove, and shackle member is clamping hexagon profile radially。

Preferably, chuck includes carrying out the operation device around axis of operation rotation process, the first driving device of driving axial keeper, and drives the second driving device of shackle member, at the first clip position, operating mechanism operates the first driving device makes axial keeper move radially；At the second clip position, operating mechanism operates the first driving device and the second driving device makes the first driving device driving axial keeper move radially, and the second driving device drives shackle member to move radially。

Preferably, chuck also has the neutral position not clamping work head, and at neutral position, axial keeper and shackle member all depart from clamping work head。

Preferably, operation device operationally rotates in the first direction, moves to the first clip position from neutral position；Operation device operationally reversely rotates along contrary with first direction second, moves to the second clip position from neutral position。

Preferably, the first driving device includes the first circumferentially disposed drive surface, and the first drive surface has the accommodation hole holding axial keeper, and when being positioned at the first clip position or the second clip position, the first drive surface promotes axial keeper to leave accommodation hole。

Preferably, axial keeper is steel ball。

Preferably, the second driving device includes the first drive division that driving shackle member radially-inwardly moves。

Preferably, the first drive division is circumferentially disposed drive surface, and drive surface radially abuts shackle member and can radially-inwardly move by push card fitting。

Preferably, the second driving device also includes the second drive division that driving shackle member is moved radially outward。

Preferably, shackle member includes lug, and the second drive division includes the convex shoulder radially outward abutting lug。

Preferably, the first driving device and the second driving device are axially fixing connects so that operation operable first driving device of device and the second driving device rotate simultaneously。

Preferably, the first driving device and the second driving device are respectively equipped with the blind hole holding alignment pin traverse, and alignment pin is fixing connects the first driving device and the second driving device。

Preferably, the first driving device and the second driving device are socketed on sleeve respectively, and operation device is be socketed in outside the first driving device and the second driving device and fix the chuck guard shield being connected with the second driving device。

Compared with prior art, the invention have the benefit that chuck can distinguish the two distinct types of work head of chuck, it is not necessary to any adnexa, use more convenient。

Another object of the present invention is to provide a kind of power tool that chuck operation can be utilized to control mode of operation switching。

The technical solution adopted in the present invention is: a kind of power tool, including: housing, it is positioned at the motor of housing, it is positioned at the drive mechanism of housing, it is driven around an axis of operation by motor through drive mechanism and rotates the chuck driven, chuck is used for clamping work head and rotary driving force passing to work head, and it is positioned at the beater mechanism of housing, beater mechanism is applied to, impacting driving force, the work head being 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, the movement that chuck can rotate around axis of operation is to the different position of at least two, and in primary importance, power tool is in the first mode of operation；In the second position, power tool is in the second mode of operation。

Preferably, chuck also has a neutral position unclamping clamping work head, and chuck rotates to first direction and moves to primary importance from neutral position；Chuck moves to the second position to the rotation of first direction opposite second direction from neutral position。

Preferably, chuck can clamp the first work head with dissimilar shank and the second work head, the shank of the first work head has axial limiting groove and radial direction stopper slot, second work head has hexagon profile and circumferential groove, chuck includes the axial keeper operationally coordinated respectively with axial limiting groove and circumferential groove, and chuck also includes the shackle member of the positive stop strip that coordinates with radial direction stopper slot and operationally radially clamping hexagon profile。

Preferably, in primary importance, axial keeper radially abuts axial limiting groove, positive stop strip circumference clamping circumference stopper slot, and shackle member and departs from clamping work head, and now power tool is in the first mode of operation；At the second operating position, axial keeper radially abuts circumferential groove, and shackle member is clamping hexagon profile radially, and now power tool is in the second mode of operation。

First mode of operation is the hammer drill pattern of output rotary driving force and impact driving force simultaneously, second mode of operation is the drill jig formula of output rotary driving force, power tool also includes the clutch connecting drive 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 producing to impact driving force to chuck；When chuck turns to the second position, arrangement of clutch interrupts the connection with beater mechanism all the time。

Preferably, link gear also includes the position-limit mechanism that selectively restriction chuck moves axially, and when chuck is positioned at primary importance, position-limit mechanism is not spacing to chuck, so that chuck operationally moves axially；When chuck is positioned at the second position, the movement of position-limit mechanism restriction chuck, so that chuck axial restraint。

Preferably, position-limit mechanism includes the fixture of axial restraint and connecting clip the moving member being axially movable, and when having axial gap between moving member and fixture, chuck is axially movable；When axially abutting between moving member with fixture, chuck axial restraint。

Preferably, chuck has axially projecting jut, and moving member has the mating part of form fit jut, and mating part includes different first the connecting face and second and connect face of axial height, when jut be coupled to first connect face time, moving member axially abuts with fixture；When jut be coupled to second connect face time, there is between moving member and fixture axial gap。

Preferably, drive mechanism includes the jackshaft connecting motor, and arrangement of clutch includes the clutching member connecting jackshaft, and clutching member has can with the clutch part of beater mechanism engagement or disengagement。

Preferably, clutch part is end-tooth。

Preferably, clutch part is taper surface。

Preferably, it is provided with between clutching member and beater mechanism to the bias piece biasing clutching member away from beater mechanism direction。

Preferably, chuck includes the axial keeper operationally coordinated respectively with axial limiting groove or circumferential groove, chuck also includes the shackle member of the positive stop strip that coordinates with radial direction stopper slot and operationally radially clamping hexagon profile, in primary importance, axial keeper radially abuts axial limiting groove, positive stop strip circumference clamping circumference stopper slot, and shackle member disengaging clamping work head；In the second position, axial keeper radially abuts circumferential groove, and shackle member is clamping hexagon profile radially

Compared with prior art, the invention have the benefit that and control to make electric hammer switch different mode of operations by chuck, without extra operation switching working mode, use more convenient。

Accompanying drawing explanation

The purpose of invention described above, technical scheme and beneficial effect by the following detailed description being capable of specific embodiments of the invention, can describe in combination with accompanying drawing and clearly obtain。

Identical label and symbol in accompanying drawing and description are used 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 first driving device schematic diagram along a visual angle of electric hammer in Fig. 1。

Fig. 5 is first driving device schematic diagram along another visual angle of electric hammer in Fig. 1。

Fig. 6 is the schematic diagram of the first actuator of the second driving device of electric hammer in Fig. 1。

Fig. 7 is the schematic diagram of the second actuator of the second driving device 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 of electric hammer clamping the first work head in Fig. 1。

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 of electric hammer clamping the second work head in Fig. 1。

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。

Along the sectional view of AA ' line when Figure 16 is electric hammer clamping the first work head in Figure 12。

Along the sectional view of BB ' line when Figure 17 is electric hammer clamping the first work head in Figure 12。

Along the sectional view of AA ' line when Figure 18 is electric hammer clamping the second work head in Figure 12。

Along the sectional view of BB ' line when Figure 19 is electric hammer clamping the second work head in Figure 12。

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

Along AA when Figure 21 is electric hammer clamping the first work head in Figure 20 " sectional view of line。

Along BB when Figure 22 is electric hammer clamping the first work head in Figure 20 " sectional view of line。

Along AA when Figure 23 is electric hammer clamping the second work head in Figure 20 " sectional view of line。

Along BB when Figure 24 is electric hammer clamping the second work head in Figure 20 " sectional view of line。

Figure 25 is the schematic diagram of the first work head。

Figure 26 is the schematic diagram of the second work head。

1, power tool 2, housing 3, drive mechanism

4, chuck 5, beater mechanism the 6, first driving device

7, the second driving device 8, clutch 9, link gear

10, axis of operation 11, work 12, head

13, shank 14, circular contour 15, half fluting

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

19, circumferential groove 20, operation device 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 the 34, first travelling gear

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

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

43, perforate 44, axial keeper 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 58, first actuator the 59, second actuator

60, domatic 61, first perforation 62, arc surface

63, the 65, second side, the 64, first side, chamber is held

66, jut 67, stuck point 68, stage portion

69, connecting hole 71, sidewall 72, roof

73, the second perforation 74, radially 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 connect 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 the 105, first cam surface

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

111, the second work 112, guard shield 113, chuck guard shield

114, instruction structure 115, locating slot 116, keeper

117, hole the 207, second driving device 244, axial keeper are positioned

246, shackle member 247, card access surface the 306, first driving device

307, the second driving device 310, biasing device 344, axial keeper

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

Detailed description of the invention

Below in conjunction with accompanying drawing, presently preferred embodiments of the present invention is described in detail。

Hand-hold power tool 1 shown in fig. 1 is 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 include electric hammer, electric pick etc.。In the present invention, illustrate with electric hammer。Electric hammer includes the housing 2 being enclosed in periphery。Housing 2 is preferably two-piece type half-shell and is spliced。As in figure 2 it is shown, in the inside of housing 2, be provided with motor 21。Motor 21 has motor drive shaft 22 for producing to rotate output。In the present embodiment, motor 21 can be direct current generator or the alternating current generator with Electronic Control or Non-follow control, can the rotating speed and preferably of governor motor by this Electronic Control or Non-follow control, it is possible to control the driving torque of motor。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 it is shown in figure 1, power tool 1 also includes the power line 23 connecting external power source, power line 23 is electrically connected motor 21, thus being supplied to motor 21 to produce to rotate the power of output。In a preferred embodiment, power tool 1 can not also comprise power line 23, but arranges inside housing 2 to the battery bag of motor 21 power supply。Battery bag can charge repeatedly, by charging inlet, battery bag is charged。Battery bag is charged by the mode that can certainly adopt wireless charging, without additionally arranging charging inlet。In unshowned embodiment, battery bag is not arranged on enclosure interior, but can adopt and tear the formula of pulling out open or other conventional fashions are connected on housing。Battery bag can disassemble and be charged。The kind of battery bag is also can the type such as lithium battery, lead-acid battery, nickel-cadmium cell。

Battery bag is generally disposed in the handle portion 24 of power tool 1。Power tool 1 has the front end being positioned on the right side of such as Fig. 1 and is positioned at the rear end 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, it is so structured that D type or other shapes such as U-shaped, has the handle hole 25 that the hands for user grips in the middle of it。Switch 26 for being switched on and off motor 21 is positioned at the edge of handle hole 26, and when the hands of user grips, finger can conveniently operate this switch 26。

Drive mechanism 3 it is additionally provided with in housing 2。The motor drive shaft 22 of motor 21 drives the chuck 4 being positioned at power tool 1 front end via this drive mechanism 3, and chuck 4 can selectively be installed and is suitable to impact type boring or is suitable to the work 11 screwed。Specifically, in the present embodiment, drive mechanism 3 includes being arranged at the reduction box casing 31 within housing 2, is arranged on the jackshaft 32 within reduction box casing 31。Reduction box casing 31 also constitutes the inner shell of power tool 1。In order to keep good sealing, the element of drive 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 is to maintain both being axially parallel to each other。The two ends of jackshaft 32 are respectively provided with spring bearing 33 for supporting jackshaft 32。Jackshaft 32 connects motor 21 and chuck 4 respectively respectively through gear transmission effect。Specifically, jackshaft 32 is fixed with the first travelling gear 34。First travelling gear 34 be located close to motor 21 position, and engage with motor drive shaft 22 gear, pass to jackshaft 32 thus the rotation of motor 21 is exported, jackshaft 32 also rotates accordingly around the axis of self。Jackshaft 32 also includes the second travelling gear 35, and the gear wheel 41 of the second travelling gear 35 and chuck 4 engages each other all the time。So having the power that motor 21 produces to pass to chuck 4 through the transmission effect of drive mechanism 3, chuck 4 can be rotatably driven around axis of operation, and then produces to rotate output to the work 11 in chuck 4。Preferably, the second travelling gear 35 is arranged on the jackshaft 32 end near chuck 4, and the second travelling gear 35 can also be provided in the spline tooth of jackshaft 32 end。

Beater mechanism 5 it is additionally provided with in housing 2。Beater mechanism 5 can be applied to, producing impulsive force, the work 11 being installed on chuck 4。Preferably, beater mechanism 5 is positioned at reduction box casing 31。Oscillating lever bearing 51 that beater mechanism 5 mainly includes being arranged on jackshaft, connect 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。Oscillating lever bearing 51 pine fits on jackshaft 32 so that Oscillating lever bearing 51 and jackshaft 32 can relatively rotate。The rotary driving force of jackshaft 32 can't pass to oscillation bearing 51 so that 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 cylinder 53 reciprocating motion relative to percussion hammer 52 the convert rotational motion of jackshaft 32。Meanwhile, the gas closed by percussion hammer 52 in cylinder 53 forms pneumatic spring, and pneumatic spring promotes percussion hammer 52 to travel forward shock work 11, thus drives work 11 along the reciprocating motion in axis of operation 10 direction。In the present embodiment, cylinder 53 is extended along axis of operation 10。In other embodiments, Oscillating lever bearing can also connect piston, drives piston to produce relative motion relative to cylinder。It addition, beater mechanism 5 can also have other forms。Such as, the axial impact force that it is work 11 by the convert rotational motion of bias that beater mechanism 5 can utilize crank mechanism to produce。These beater mechanisms 5 are all structures common in this area。

The chuck 4 of the present embodiment can clamp the different types of work 11 of at least two。Work head includes such as the first work 110 shown in Figure 25 or the second work 111 as shown in figure 26。These work 11 all include the head 12 with absorption surface and the shank 13 being coupled in chuck 4。But shank 13 is generally of different shapes。For the first work 110, its shank 13 substantially has circular contour 14, is respectively provided with groove on 4 circular Along ent positions simultaneously。These 4 grooves have same structure between two, thus altogether forming structure two kinds different。And two circumferentially relative grooves have same structure。As shown in figure 25, one of which is configured to one end and closes, half fluting 15 of one end open。The bearing of trend of half fluting 15 is consistent with the bearing of trend of whole work 11。The open end 16 of half fluting 15 should be positioned at the end of shank 13, thus when this work 11 is inserted in chuck 4, in chuck 4 with should just can be inserted in half fluting 15 from open end 16 by bulge-structure corresponding to half fluting 15, thus playing the effect that radial direction is spacing。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 work 11。After other elements snap onto enclosed slot 17, it is possible to work 11 is played the effect of axial limiting。Enclosed slot 17 and half fluting 15 are 90 degree relative to the angle of work 11 central axis。The head 12 of tup 110 has spiral decorative pattern, the discharge being beneficial in boring procedure chip。For the second work 111, its shank 13 is arranged with having two separation distances from each other, length is different, the section with regular hexagonal profile 18, these sections by standardized have spill rounding cross section circumferential groove 19 separate。

In the present embodiment, chuck 4 can clamp the work 11 of above two type respectively。Specifically, as long as user operation chuck 4 rotates can handle work 11 by fixation clamp around axis of operation 10, and two kinds of work 11 can clamp, thus bringing conveniently to operation。As shown in Figures 2 and 3, chuck 4 includes and holds the sleeve 42 that the shank 13 of work 11 inserts。Sleeve 42 substantially becomes cylindrical shape, and sleeve 42 extends along axis of operation 10 direction, its axial two ends perforate 43 respectively。Being generally circular in shape of perforate 43, and radius is sufficiently large, so can ensure that all types of work 11 can be inserted into。Chuck 4 includes the retaining mechanism locking the work 11 being inserted in sleeve 42。In order to the work 11 of the different handle shapes design of clamping, the axial keeper 44 that the retaining mechanism of chuck 4 includes operationally this kind of with enclosed slot 17 axial limiting groove and circumferential groove 19 coordinates, further comprises positive stop strip 45 that the radial direction stopper slot this kind of with half fluting 15 coordinate and operationally radially clamping works the shackle member 46 of head hexagon profile 18。

It addition, chuck 4 also has the first clip position of clamping the first work 110 and the second clip position of clamping the second work head。When chuck 4 moves to the first clip position as shown in Figure 9, the first work 110 being inserted in sleeve 42 just can be clamped by chuck 4。And when chuck 4 moves to the second clip position as shown in figure 12, the second work 111 being inserted in sleeve 42 just can be clamped by chuck 4。Specifically, at the first clip position, as shown in Figure 10 and Figure 11, axial keeper 44 radially abuts axial limiting groove and positive stop strip 45 circumference clamping circumference stopper slot, and now shackle member 46 departs from clamping the first work 110, it does not have play the effect of clamping。At the second clip position, as shown in Figure 13 and Figure 14, axial keeper 44 radially abuts circumferential groove 19, the hexagon profile 18 of shackle member 46 radially clamping the second work 111, and now positive stop strip 45 does not have 111 position-limiting action that work to second。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 respectively corresponding work head clamped。Preferably, chuck 4 also has the neutral position not clamping any work 11。When chuck 4 is in neutral position, axial keeper 44 and shackle member 46 all depart from clamping work 11, and work 11 very easily can pull up from chuck 4 or from outside, work 11 is inserted into chuck 4。When neutral position, user is inserted into the first work 110 in chuck 4, and then operation chuck 4 moves to the first clip position, then the first work 110 is just firmly clamped by chuck 4 by axial keeper 44 and positive stop strip 45。When neutral gear position, user is inserted into the second work 111 in chuck 4, and then operation chuck 4 moves to the second clip position, then the second work 111 is just firmly clamped by chuck 4 by axial keeper 44 and shackle member 46。

As shown in Figures 2 and 3, axial keeper 44 is located substantially in the circumferential plane of vertical operation axis 10, and axial keeper 44 point of symmetry centrosymmetry centered by the axis of operation 10 subpoint in circumferential plane。In the present embodiment, the quantity of axial keeper 44 is two, and certainly axially the quantity of keeper can also three and more than three。When the quantity of axial keeper 44 is two time, axial keeper 44 is symmetrical about axis of operation 10。It is internal with fixing work 11 that axial keeper 44 can drivingly be moved radially and be entered into sleeve 42。The sidewall of sleeve 42 has the first space 421 holding the radially turnover of axial keeper 44。The shape in the first space 421 and quantity are all matched with axial keeper 44。In the present embodiment, axial keeper 44 is steel ball, so the first space 421 is generally circular in shape, its radius is a bit larger tham the radius of axial keeper 44, facilitates axial keeper 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 keeper 44 are 90 degree relative to the angle of axis of operation 10。Such design is for coordinating the first work 110 from the insertion of sleeve 42。When the first work 110 is inserted in sleeve 42, half fluting 15 of the first work 110 just with positive stop strip 45 form fit。Meanwhile, axial keeper 44 operationally moves radially, and enters partly in the enclosed slot 17 of the first work 110 and lock。Owing to enclosed slot 17 two ends are all closed, therefore axially keeper 44 first work 110 can be carried out along axis of operation 10 direction spacing, but be not entirely limited dead。Axial keeper 44 can tup relatively, enclosed slot 17 can do a degree of axial displacement。The concrete operations of axial keeper 44 can be mentioned in subsequent descriptions。And owing to half fluting 15 circumferentially locks with positive stop strip 45, 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 work 110 driving force, drives the first work 110 also to rotate around axis of operation 10 accordingly。

Shackle member 46 is located substantially in the circumferential plane of vertical operation axis 10, and shackle member 46 point of symmetry centrosymmetry centered by the axis of operation 10 subpoint in circumferential plane。Shackle member 46 is similar to axial keeper 44 in this, and both have identical projected position in circumferential plane, and namely shackle member 46 and axial keeper 44 are 0 degree relative to the angle of axis of operation 10。Shackle member 46 is equally possible to be moved radially。And in the present embodiment, the quantity of shackle member 46 is two about axis of operation 10 symmetry。As it is shown on figure 3, shackle member 46 is generally the column construction of cuboid。Certainly, shackle member 46 can also be other shapes such as cylinder, triangle body。Shackle member 46 has the card access surface 47 of radially aligned shank 13, and card access surface 47 is V-type bending side。V-type opening alignment shank。The angle in V-type face is preferably 120 degree, so can ensure that V-type opening can snap fit onto to form fit on the hexagon profile 18 of the second work 111。The footpath of the card access surface dorsad 47 of shackle member 46 is rearwardly provided with the floating-point 48 of projection, thus makes other elements be contacted by floating-point 48 with contacting of spacer pin, it is ensured that being all point cantact, consequent frictional force is less。It addition, the card access surface 47 opposite sides face of shackle member 46 further respectively has lug 49。Lug 49 is prominent from corresponding side respectively along axis of operation 10 direction。There is Second gap 422 on the sleeve 42 that hold card access surface 47 radially turnover。The form fit of Second gap 422 is in shackle member 46。So Second gap 422 be shaped as rectangle, and the length of this Second gap 422 with the wide length being a bit larger tham limit shackle member 46 respectively with wide so that shackle member 46 can free in and out this Second gap 422。First space 421 is spaced on axis of operation 10 direction with Second gap 422, so makes the diverse location of the shank 13 of axial keeper 44 and shackle member 46 just clamping work 11。Incorporated by reference to Fig. 9 and Figure 12, after the shank 13 of the second work 111 is inserted in sleeve 42, on the one hand, axial keeper 44 operationally moves radially, and enter partly in the circumferential groove 19 in the second work 111 and lock, say, that axially the second work 111 can be carried out axial limiting by keeper 44。On the other hand, shackle member 46 can operatively move radially, and the card access surface 47 of shackle member 46 closely adheres on the hexagon profile 18 of the second work 111, so that shackle member 46 and the second work 111 circumferentially lock, when chuck 4 rotates around axis of operation 10 time, shackle member 46 can be supplied to the second work 111 rotary driving force, drives the second work 111 also to rotate around axis of operation 10 accordingly。

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 move axially or other mode moves。Chuck 4 includes and can carry out the operation device 20 around axis of operation rotation process, the first driving device 6 of driving axial keeper 44 and drive the second driving device 7 of shackle member 46。When operating device 20 and operationally turning to the first clip position, such as Fig. 9 to Figure 11, it is shown that operation device 20 just operation the first driving device 6 driving axial keeper 44 moves radially, thus the first work 110 is clamped。Significantly, since the first work 110 is in the process inserting sleeve 42, positive stop strip 45 is directed at the circumferential stopper slot in also clamping the first work 110 automatically, it is not necessary to positive stop strip 45 is driven by extra driving element。In the present embodiment, positive stop strip 45 is be 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 located close to perforate 43 place, thus convenient when sleeves 42 are inserted in the first work 110, its circumference stopper slot is automatically and positive stop strip 45 form fit。When operating device 20 and operationally turning to the second clip position, as shown in Figure 12 to Figure 14, operation device 20 just operation the first driving device 6 driving axial keeper 44 moves radially to snap in circumferential groove 19, operation device 20 operates the second driving device 7 and drives shackle member 46 to move radially with clamping hexagon profile 18 simultaneously, thus the second work 111 is clamped。In a preferred embodiment, operation device 20, in the first direction around axis of operation 10 rotation process, makes chuck 4 move to the first clip position from neutral position；Operation device 20, in a second direction around axis of operation 10 rotation process, makes chuck 4 move to the second clip position from neutral position；First direction is contrary with second direction。In other embodiments, first direction and second direction can also be angles identical or at an angle。

As shown in Figures 3 to 5, the first driving device 6 substantially circlewise, has the first perforation 61 and passes to hold sleeve 42 in the middle of it。The circumferential hole wall surrounding the first perforation 61 is mainly made up of arc surface 62, and the distance at the center of arc surface the 62 to the first driving device 6 is R1。Additionally also having outwardly accommodation chamber 63 on hole wall, the cambered surface in composition accommodation chamber 63 is R2 to the distance at the center of the first actuator, and wherein R2 is more than R1。Axial keeper 44 is normally in accommodation chamber 63, and owing to holding footpath, chamber 63 convex, now axially keeper 44 is not connected to the shank 13 in sleeve 42。After the first driving device 6 is operated by operation device 20 and produces rotation, hold the axial keeper 44 in chamber 63 and will detach accommodation chamber 63, and start to abut arc surface 62。Owing to R1 is less than R2, so arc surface 62 just promotes axial keeper 44 radially-inwardly to move, thus axial keeper 44 being abutted to the shank 13 in sleeve 42。Moreover, it is noted that no matter turn to the first clip position or turn to the second clip position, hold the axial keeper 44 in chamber 63 and will detach accommodation chamber 63, and arc surface 62 promotes axial keeper 44 radially-inwardly to move。First driving device 6 also has relative two side, 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 the 60 of inclination and the stuck point 67 of projection。The effect of domatic 60 is mainly that other elements can be made to climb up jut 66 when the first driving device 6 rotates more convenient。And the effect arranging stuck point 67 is easy for location。Protruding stuck point 67 can match by the stuck point of depression on other elements, and after putting in place, both are that shape connects。Certainly in other embodiments, the stuck point 67 of jut 66 can also be arranged to depression, and the stuck point on other elements is arranged to prominent projection。In the present embodiment, the quantity of jut 66 is two, and is along the circumferential direction placed exactly in the two ends place of diameter。The quantity of jut 66 is also not necessarily limited to two, it is possible to be three and more than three。It addition, the part-circular periphery on the first side 64 is additionally provided with stage portion 68, for coordinating with other elements。Can be discussed in detail in description after a while。Second side 65 facing to the first side 64 facing to contrast。Second side 65 has connecting hole 69, the second driving device 7 can be coupled together by inserting the alignment pin (not shown) in connecting hole 69。Connecting hole 69 is preferably blind hole。

For driving the second driving device 7 of shackle member 46 to be socketed on the sleeve 42, and axial location is consistent with the axial location of shackle member 46。Second driving device 7 radial drive shackle member 46 moves。In the present embodiment, the second driving device 7 includes the first actuator 58 and the second actuator 59 of split design。Certain first actuator 58 and the second actuator 59 can also be one-body molded。As shown in Figure 2 and Figure 6, the cylinder of the first actuator 58 substantially one end open。First actuator 58 mainly includes 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 to hold sleeve 42。Being provided with radially boss 74 inside the sidewall 71 of annular, radially boss 74 is for the second actuator 59。Radial direction boss 74 is additionally provided with the connecting hole 75 coordinated with alignment pin。So by alignment pin, the first actuator 58 and the second actuator 59 are not coupled together rotatably。The drive surface 76 for driving shackle member 46 it is additionally provided with inside the sidewall 71 of the first actuator 58。This drive surface 76 constitutes the first drive division that actuator shackle member 46 radially-inwardly moves。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 tactile with the radial direction back face of shackle member 46。Specifically, the floating-point 48 that drive surface 76 rearwardly goes up with footpath contacts。Gradual change due to the radius of this drive surface 76, therefore when the first actuator 58 carries out rotating operation, make floating-point 48 relative to the first actuator 58 to the first direction that radius diminishes move time, floating-point 48 is just driven the withstanding effect in face 76 and makes shackle member 46 produce radial displacement, thus realizing the shackle member 46 locking to work 11。When floating-point 48 moves to the big second direction of radius change relative to the first actuator 58, and first direction and second direction are contrary。First drive division will 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 corresponding。The relative movement under the effect of a corresponding drive surface 76 of each shackle member 46。It addition, be additionally provided with locating slot 77 outside the sidewall 71 of the first actuator 58, locating slot 77 is used for and operation device 20 is fixing connects。The operation of operation device 20 is such that it is able to pass to the second driving device 7。In the present embodiment, operation device 20 is be arranged on the chuck guard shield 113 being socketed in outside the first driving device 6 and the second driving device 7。Chuck guard shield 113 both can give chuck 4 protective action, and the person of additionally using directly need not operate driving mechanism and be operated by chuck guard shield 113 and at once drive driving mechanism corresponding sports。The instruction structure 114 being easy to user operation additionally can be set on chuck guard shield 113, utilize the operation that user is fast and convenient。In other examples, operation device 20 can also be provided in toggle switch or other elements of outside。

As it is shown in fig. 7, the second actuator 59 is roughly annular。Second actuator 59 has the 3rd perforation 57 holding sleeve 42 traverse。Second actuator 59 is arranged in the cylinder of the first actuator 58。The circumference of the second actuator 59 is provided with the depressed part 56 of indent, and the effect of depressed part 56 is radial direction boss 74 clamping with the first actuator 58, thus ensureing that the first actuator 58 and the second actuator 59 are without connecting in relative rotation。In the present embodiment, the second driving device 7 also includes the second drive division that driving shackle member 46 is moved radially outward。Second drive division is collectively formed by the first actuator 58 and the second actuator 59。When operating mechanism 9 operate the second driving device 7 rotate time, the second drive division can drive shackle member 46 to be moved radially outward, from locking work 11 position be returned to unclamp locking work 11 position。This second drive division also has the effect to shackle member 46 axial limiting。As in figure 2 it is shown, the first actuator 58 and the second actuator 59 are respectively provided with convex shoulder 78, convex shoulder 78 just abuts against with the lug 49 of shackle member 46, is used for providing radially outer supporting role。Owing to the lug 49 of shackle member 46 is bearing on the convex shoulder 78 of correspondence 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。Axial sides at the second actuator 59 is provided with the projection 55 of projection。The profile of projection 55 constitutes 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 the radian of bending and the first actuator 58。The roof 72 of the first actuator 58 is provided with the projection 55 of correspondence simultaneously。The profile of the projection 55 on roof 72 is formed and constitutes consistent with the profile of the projection 55 on the second actuator 59。Owing to the first actuator 58 and the second actuator 59 not can be movable relatively, when the second driving device 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。Thus drive surface 76 is while radially-inwardly pressing shackle member 46, and convex shoulder 78 also radially-inwardly moves, and can't produce radially outer resistance。When shackle member 46 moves to the big second direction of radius change relative to drive surface 76, convex shoulder 78 on first actuator 58 and the second actuator 59 moves to second direction, thus the lug 49 of push card fitting 46 is moved radially outward, and now the drive surface 76 of the first drive division is also moved radially outward, and will not produce radially inner resistance。Thus convex shoulder 78 is moved radially outward, and towards radially outward direction push card fitting 46, and drive surface 76 becomes big 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 includes the hammer pattern of individually output impact driving force, and the hammer drill pattern of driving force and rotary driving force is impacted in the drill jig formula and the output simultaneously that individually export rotary driving force。And the power tool in the present invention has the different types of mode of operation of at least two, 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, it is also possible to refer to hammer drill pattern。And the second mode of operation refers to individually export the drill jig formula of rotary driving force。The 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 being rotated about axis, it is possible to turns to different positions。When moving to primary importance, power tool is switched to the first mode of operation；When moving to the second position, power tool could switch to the second mode of operation。In other examples, chuck can also switch to different mode of operations by the operation moved axially。The state that can also adopt electron detection chuck changes, and switches to different mode of operations etc. additive method。

It addition, chuck operates rotationally also has multitude of different ways。In the present embodiment, chuck moves to primary importance in the first direction from neutral position, and electric hammer is handed off the first mode of operation；Chuck is from neutral position along moving to the second position with first direction opposite second direction, and electric hammer is handed off the second mode of operation。In other examples, chuck is rotated in a first direction to primary importance, and electric hammer is handed off the first mode of operation, and chuck continues to be rotated in a first direction to the second position, and electric hammer just switches to the second mode of operation accordingly。Chuck turns to different operating positions in a word, it is possible to corresponding to different gears, and each gear just corresponding corresponding mode of operation of electric hammer。

And owing to the chuck of the present invention can clamp different types of work head, the work head that therefore grips is different can be switched to corresponding mode of operation accordingly。Such as, when chuck move to clamp applicable first mode of operation work head the first clip position time, chuck just can be switched to the first mode of operation power tool accordingly, when chuck move to clamp applicable second mode of operation work head the second clip position time, chuck just can and accordingly power tool is switched to the second mode of operation。This brings many convenience to user, the corresponding step selecting mode of operation after the step of head and clamping that grips can be worked is combined in a step of grips work head, because namely automatically selecting the mode of operation of correspondence after the complete work head of the grips in the present invention。

As in figure 2 it is shown, power tool includes the clutch 8 connecting drive mechanism and the 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 drive mechanism 3, thus exporting accordingly or not exporting impact driving force。And chuck 4 just drives clutch 8 to produce corresponding clutch by the gearing of link gear 9。Clutch 8 mainly includes the clutching member 81 connecting drive mechanism 3 all the time, and clutching member 81 selectively connects beater mechanism 5。In other embodiments, clutching member 81 can also connect beater mechanism 5 all the time, and selectively connects drive mechanism 3。Clutching member 81 can also selectively be connected with beater mechanism 5 and drive mechanism 3 respectively。Clutch 8 is additionally 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, the rotary motion of jackshaft 32 just can pass through pass 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 includes 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 can also be in different positions。Clutch part 84 is to carry out clutch in the way of moving axially with the Oscillating lever bearing 51 on centrally located axle 32。When clutch part 84 engages with Oscillating lever bearing 51, drive mechanism 3 just produces power with beater mechanism 5 and is connected, and beater mechanism 5 produces impulsive force to the work 11 in chuck 4。When clutch part 84 disengages and when engaging of Oscillating lever bearing 51, drive mechanism 3 just runs out of steam with beater mechanism 5 and is connected, and beater mechanism 5 will not produce impulsive force to work 11。Certainly, clutch part 84 can also carry out clutch with other elements in beater mechanism 5, for instance percussion hammer 52, cylinder 53 etc.。It addition, beater mechanism 5 is if crank-type, then clutch part 84 can also carry out clutch with crank or travelling gear。Additionally clutch mode can be the clutch of clutch radially or circumference, for instance the mode of clamping tooth engagement。Additionally in the present embodiment, clutch part 84 has the profile of cone, and after clutch part 84 generation moves axially, the profile of clutch part 84 just tightly engages with beater mechanism 5, thus carrying 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 tightly engages with beater mechanism 5。Be additionally provided with between clutch part 84 and beater mechanism 5 bias away from bias piece。Here bias piece can be preferably wind spring。

And link gear 9 is between chuck 4 and clutch 8, act primarily as gearing。Chuck 4 produces to move axially just to make the clutching member 81 of clutch 8 produce accordingly to move axially by link gear 9。In the present embodiment, link gear 9 includes shift fork, and shift fork has the O 38 on the sleeve 42 being socketed in chuck 4 and from haptic element 37 outwardly directed O 38。O 38 utilizes the fixture of other modes such as collar to fix on the sleeve 42。Haptic element 37 is connected to clutching member 81, and after chuck 4 generation is mobile, O 38 also moves accordingly, drives clutching member 81 to move accordingly thereby through haptic element 37, to carry out clutch action。

After chuck 4 is inserted in the first work 110, chuck 4 turns to the first clip position accordingly, and now chuck 4 fixation clamp handles the first work 110。Then power tool 1 is activated, and the driving force produced by 3 motors 21 of drive mechanism passes to the first work 110 on chuck 4, makes the first work 110 can rotate around axis of operation 10。When the first work 110 touches surface of the work, surface of the work is supplied to the thrust that the first work 110 is axial。First work 110 drives chuck 4 to produce to move axially, and makes the clutching member 81 of clutch 8 move axially accordingly thereby through link gear 9。And after clutching member 81 moves and engages with beater mechanism 5, beater mechanism 5 just produces to impact driving force to the first work 110 on chuck 4, now power tool 1 produces rotary driving force simultaneously and impacts driving force to the first work 110, and power tool 1 is in the first mode of operation。

Preferably, link gear 9 also includes the position-limit mechanism 39 that selectively restriction chuck 4 moves axially。When chuck 4 moves to the first clip position, chuck 4 is not carried out spacing by position-limit mechanism 39, so that chuck 4 can move axially, carries out power tool 1 to switch to the first mode of operation。But when chuck 4 moves to the second clip position, the second work 111 of chuck 4 fixed clamp。Position-limit mechanism 39 can limit the movement of chuck 4, so that chuck 4 axial restraint。After chuck 4 is limited, clutch 8 is disengaged from beater mechanism 5 all the time, being connected thus drive mechanism 3 also disengages power with beater mechanism 5 all the time, now power tool 1 only produces rotary driving force to the second work 111, and power tool 1 is in the second mode of operation。

As shown in Fig. 3 to Figure 14, position-limit mechanism 39 controls the mode of the axial air gap between chuck 4 and other elements and 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 are absent from axial air gap, and namely chuck 4 and other elements abut against, chuck 4 now just cannot be carried out moving axially。When the present invention is not limited to this kind of mode, it would however also be possible to employ circumference clamping, the mode such as inclined-plane abutting。Position-limit mechanism 39 mainly includes the fixture 91 of axial restraint and can make the moving member 92 moved 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 move axially。In the present embodiment, fixture 91 is fixed by the reinforcement on housing 2 inwall so that fixture 91 and housing 2 are relatively fixed, and fixture 91 cannot be moved。Preferably, the sleeve 42 of chuck 4 can also be played a supportive role by fixture 91, and fixture 91 internal openings is held sleeve 42 and passed。And moving member 92 can move axially by opposed fixed member 91。The bias piece 93 of its bias effect it is provided with between fixture 91 and moving member 92。Bias piece 93 biases moving member 92 to the direction away from fixture 91。Preferably, in order to reduce friction and improve precision, the axial sides of fixture 91 is also cased with 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 roughly annular setting。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 it abuts towards the side of motor 21 with bias piece 93, and it then abuts with the first driving device 6 on chuck 4 towards the side of work 11。Specifically, have and the mating part of jut 66 form fit on the first driving device 6 towards the side of work 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 relatively low, when jut 66 connect with first face 95 abut time, jut 66 just can promote the distance that moving member 92 moves along axis to fixture 91 direction relatively big, so that moving member 92 axially abuts with fixture 91。When jut 66 connect with second face 96 abut time, jut 66 promotes the distance that moving member 92 moves along axis to fixture 91 direction less, so that having axial gap between moving member 92 and fixture 91。Preferably, in order to when coordinating chuck 4 to be positioned at neutral position, the first driving device 6 abuts with moving member 92 drive, moving member 92 also includes neutral gear and connects face 97, and neutral gear connects the axial height in face 97 lower than the first axial height connecting face 95。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 driving device 6 to rotate in the first direction to the first clip position from neutral position, jut 66 connects face 97 and is transferred to second and connects face 96 from abutting neutral gear。When chuck drives the first driving device 6 from neutral position along when rotating to the second clip position with first direction opposite second direction, jut 66 connects face 97 and is transferred to first and connects face 95 from abutting neutral gear。First connecting face 95, second connecting face 96 and neutral gear connects face 97 and is provided with between plane between two and smooth domatic carries out transition, jut 66 is facilitated to carry out climbing or descending in moving process。It addition, the radially inner side of moving member 92 also has locating slot 115。Keeper 116 part as shown in Figure 3 is arranged at this locating slot 115。Meanwhile, the hole, location 117 for holding part keeper 116 it is correspondingly provided with on the sleeve 42。So circumferentially fixed by 116 moving members 92 of keeper and sleeve 42, thus moving member 82 cannot relatively rotate by relative sleeve 42。Preferably, first connecting face 95, second connecting face 96 and neutral gear connects face 97 and is respectively provided with and stuck point 67 on jut 66 coordinates the location stuck point 98 of location。Additionally, be additionally provided with axial raised positioning convex 99 on mating part。Stage portion 68 snap-fit engagement on positioning convex 99 and the first driving device 6, it is simple to location。The radial outer periphery of moving member 92 is additionally provided with perforation with the fixing guard shield 112 of fixing connection。Fixing guard shield 112 other fixed forms such as shape can also be joined the mode such as clamping or magnetic absorption and fix with moving member 92 and be connected。Fixing guard shield 112 is the same with moving member 92, can only move axially and can not rotate。Preferably, fixing guard shield 112 connects with chuck guard shield 113。Fix simultaneously guard shield 112 be provided with display multiple-working mode pattern match with the instruction structure 114 on chuck guard shield 113。After chuck guard shield 113 rotates accordingly, instruction structure 114 points to the pattern of mode of operation of correspondence accordingly, and such user is known that the mode of operation residing for current power instrument, more convenient operation and will not maloperation。

First work 110 is inserted in sleeve 42, and user operation is operated by device 20 makes chuck 4 be rotated in a first direction, first driving device 6 driving axial keeper 44 fixed clamp the first work 110。Meanwhile, the jut 66 of the first driving device 6 abuts to second and connects on face 96, makes chuck 4 to move axially。After chuck 4 moves axially, making beater mechanism 5 be connected with drive mechanism 3 power by link gear 9 and clutch 8, power tool 1 just output rotary driving force and impact driving force, to the first work 110, are now in the first mode of operation。

Second work 111 is inserted in sleeve 42, user operation is operated by device 20 makes chuck 4 rotate along with first direction opposite second direction, and the first driving device 6 driving axial keeper 44 and the second driving device 7 drive the second work 111 of shackle member 46 fixed clamp。Meanwhile, the jut 66 of the first driving device 6 abuts to first and connects on face 95, makes chuck 4 axial restraint to move。Beater mechanism 5 disconnects with drive mechanism 3 power all the time, and power tool 1 only exports rotary driving force to the second work 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 first embodiment is that the quantity of shackle member 246 is 3。And the card access surface 247 of shackle member 246 is plane。The first drive division that the driving shackle member 246 of the second driving device 207 radially-inwardly moves is no longer the curved surface of radius gradual change, but the cam surface 101 changed by two height is constituted。After inserting the second work 111, after operating the second driving device 207 rotation, highly relatively low cam surface 101 drives shackle member 246 to move radially thus abutting the second work 111。Axially keeper 244 still snaps fit onto on the circumferential groove 19 of the second work 111 simultaneously。And after inserting the first work 110, shackle member 246 is connected to highly higher cam surface 101, thus shackle member 246 not radially clamping the first work 110。But it is dependent on axial keeper 244 and snaps fit onto the first work 110 realization location。Preferably, shackle member 246 can also be provided with in the circumferential plane at the first driving device 206 place。

Figure 20 to Figure 24 is the power tool of the third embodiment of the present invention, being mainly characterized by of 3rd embodiment, the first drive division that the driving shackle member 346 of the second driving device 307 radially-inwardly moves is that the cam surface 109 changed by two height is constituted equally, and this point and the second embodiment ratio are relatively similar。It addition, the first driving device 306 includes the biasing device 310 of radially biased axial keeper 344。In the present embodiment, biasing device 310 is the stage clip of pivoting, the axial keeper 344 of stage clip radial compression。It addition, the second driving device 307 drives the second drive division that shackle member 346 is moved radially outward to have the bias piece 102 being arranged in shackle member 346 to constitute。Shackle member 346 has accommodation chamber for holding the bias piece 102 being radially 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 is relatively low with the radial direction radius in cam surface 109 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 is higher with the radial direction radius in cam surface 109 abuts, the compression of fitting 346 obtains a degree of release。Sleeve 42 is correspondingly provided with stage portion in the circumferential。And in the radial direction, bias piece 102 promotes whole fitting 346 to move laterally。

The present invention is not limited to the specific embodiment structure lifted, and the structure based on present inventive concept belongs to scope。

Claims (19)

1. a power tool, a kind of work head can be installed, described work head has hexagon profile and circumferential groove, described power tool includes: housing, it is positioned at the motor of described housing, it is positioned at the drive mechanism of described housing, by described motor through described drive mechanism drive and make around one axis of operation rotate chuck, described chuck includes the sleeve holding described work head, it is characterized in that: described chuck includes can radially across the axial keeper of described sleeve and shackle member, described axial keeper coordinates with described circumferential groove radially movablely, described shackle member radially movablely with the hexagon contoured fit of described work head。

2. power tool according to claim 1, it is characterised in that: described shackle member is distributed about described axis of operation centrosymmetry, and has the card access surface of hexagon profile described in radially clamping。

3. power tool according to claim 2, it is characterised in that: described card access surface is V-type face or plane。

4. power tool according to claim 3, it is characterised in that: the angle in described V-type face is 120 degree。

5. power tool according to claim 1, it is characterized in that: described chuck includes the operation device of the first driving device, the second driving device and operation the first driving device and described second driving device that are socketed on described sleeve, described operation device operationally makes described first driving device drive described axial keeper to move radially to snap in described circumferential groove, and described operation device operationally makes described second driving device drive described shackle member to move radially with clamping hexagon profile。

6. power tool according to claim 5, it is characterised in that: described second driving device has the first drive division driving described shackle member radially-inwardly to move。

7. power tool according to claim 6, it is characterised in that: described first drive division is circumferentially disposed drive surface, and described drive surface radially abuts described shackle member and described shackle member can be promoted radially-inwardly to move。

8. power tool according to claim 7, it is characterised in that: described drive surface is the curved surface of radially radius gradual change。

9. power tool according to claim 8, it is characterised in that: described shackle member also includes the floating-point abutting described drive surface。

10. power tool according to claim 7, it is characterized in that: described drive surface includes the first plane and the second plane that radially radius is different, when being switched to the second plane from described first plane, described second plane promotes described shackle member radially-inwardly to move。

11. power tool according to claim 6, it is characterised in that: described second driving device also includes the second drive division, and described second drive division promotes described shackle member to be moved radially outward。

12. power tool according to claim 11, it is characterised in that: described second drive division includes the bias piece radially biasing described shackle member。

13. power tool according to claim 11, it is characterised in that: described shackle member includes lug, and described second drive division includes the convex shoulder radially outward abutting described lug。

14. power tool according to claim 13, it is characterised in that: described convex shoulder abuts the radial direction radius gradual change of the bearing surface of described lug。

15. power tool according to claim 14, it is characterised in that: described first drive division is the drive surface of radially radius gradual change, and the described drive surface direction that radially radius diminishes is in opposite direction with what described bearing surface radially radius diminished。

16. power tool according to claim 11, it is characterized in that: described second driving device includes having the first actuator of described first drive division and has the second actuator of described second drive division, described first actuator is in the tubular along described axis of operation opening, and in described first actuator, shackle member and described second actuator are stated in accommodation to some extent。

17. power tool according to claim 16, it is characterized in that: described first actuator alignment pin described first driving device of fixing connection by arranging along described axis of operation direction, described second actuator has the accommodation portion holding described alignment pin traverse so that described first actuator and the not relatively turnable connection of the second actuator。

18. power tool according to claim 5, it is characterised in that: described operation device operationally rotates。

19. power tool according to claim 18, it is characterised in that: described operation device is be socketed in the chuck guard shield that described sleeve is peripheral。